Title of Invention	A MODULAR PURE AIR UNIT DEVICE FOR FEEDING PURE AIR INTO CLEAN ROOMS HAVING PHARMACEUTICAL, GROCERY AND BIOTECHNICAL PRODUCT
Abstract	The invention relates to a modular pure air unit device for feeding pura ar into clean rooms having pharmaceuticals, grocery and bio-technical products, the device comprising atieast one fan means (4, 4a, 4b, 4d); and atleast one beat transmitter (3,3a, 3b, 3d) operatively connected, and being disposed adjacent to the atlaast one fan means, the atleast one heat transmitter configured as a finned tube heat exchanger; the fan means (4, 4a, 4b, 4d) having atleast one filter (7,7a, 7b, 7d) through which pure air flowing into the clean rooms, the fan means (4,4a, 4b, 4d) drawing air from a fresh air chamber (5,5d) disposed in a region between the fen means and a ceiling (ft), e common housing (1, la, lb, 1d) is provided to accommodate the atlaast one fan means (4,4a, 4b, 4d), the atleast one filter (7, 7a, 7b, 7d), and the atlaast one heat transmitter (3,3a, 3b, 3d) to form a built-in-module so that the fresh air flowing through the atieast one filter (7) directly delivered to the clean rooms and the exiting air from the clean rooms being directly fed to the atleast one heat transmitter (3).

Title of Invention

A MODULAR PURE AIR UNIT DEVICE FOR FEEDING PURE AIR INTO CLEAN ROOMS HAVING PHARMACEUTICAL, GROCERY AND BIOTECHNICAL PRODUCT

Abstract

The invention relates to a modular pure air unit device for feeding pura ar into clean rooms having pharmaceuticals, grocery and bio-technical products, the device comprising atieast one fan means (4, 4a, 4b, 4d); and atleast one beat transmitter (3,3a, 3b, 3d) operatively connected, and being disposed adjacent to the atlaast one fan means, the atleast one heat transmitter configured as a finned tube heat exchanger; the fan means (4, 4a, 4b, 4d) having atleast one filter (7,7a, 7b, 7d) through which pure air flowing into the clean rooms, the fan means (4,4a, 4b, 4d) drawing air from a fresh air chamber (5,5d) disposed in a region between the fen means and a ceiling (ft), e common housing (1, la, lb, 1d) is provided to accommodate the atlaast one fan means (4,4a, 4b, 4d), the atleast one filter (7, 7a, 7b, 7d), and the atlaast one heat transmitter (3,3a, 3b, 3d) to form a built-in-module so that the fresh air flowing through the atieast one filter (7) directly delivered to the clean rooms and the exiting air from the clean rooms being directly fed to the atleast one heat transmitter (3).

Full Text	The invention relates to a pure air unit for the phramacy-, grocery- and bio-technical industry. More particularly, the invention relates to a modular pure air unit device for feeding pure air into clean rooms having phramaceutical, grocery and biotechnical product. It is known in the pharmacy- and bio-technical industry how to handle corresponding products outside a clean room of the category A and also in clean rooms of the categories B, C and D. Pure air is fed into these clean rooms through filters which are arranged in the ceiling of the corresponding clean room.The pure air is fed through channels of circulating air units which are connected to at least one external air device which is situated in the region outside the clean rooms, These pure air units have a cumbersome design due to the channel system for feeding fresh air and therefore require a corresponding installation space. It is the task of this invention to design the generic pure air unit in such a way that the fresh air can be fed reliably into the respective clean rooms with a simpler design and more compact measurements. This task is fulfilled in the generic pure air unit as per the features of the invention. In the pure air unit as per the invention, the fan, the filter and the heat transmitter are accommodated in a common housing . Therefore, cumbersome channels for feeding the fresh air or return guiding of the return air are no longer required. The fresh air flowing through the filter lands directly into the clean room, while the return air coming out of the clean room is directly fed to the heat transmitter. The pure air unit as per the invention is therefore is design-wise simpler and can be built without much complication. On account of the design as per the invention, the pure air unit designed as a modular unit has only small measurements, so that the pure air unit can also be installed in places where only small installation space is available. Further features of the invention can be obtained from the further claims, the description and the accompanying drawings. The invention is described in more details on the basis of a few design examples shown in the drawings. The following are shown: Fig. 1 A pure air unit as per the invention in perspective view; Fig. 2 The pure air unit as per figure 1, in top view; Fig 3 A section along the line A-A in fig. 2; Fig 4 A second design form of a pure air unit as per the invention, in top view; Fig. 5 Top view of a third design form of a pure air unit as per the invention; Fig. 6 In section, a further design form of a heat transmitter of a pure air unit as per the invention; Fig. 7 In a depiction corresponding to fig. 4, a further design form of a pur air unit as per the invention; Fig. 8 The pure air unit as shown in fig. 7, in a view inclined from below. The pure air unit is meant for application in the pharmacy or grocedry industry or even in the area of bio-technology. The pure air unit is designed as a module and is used in the clean room category B, C and D. The pure air unit according to fig. 1 to 3 has a housing 1, in which a filter fan unit 2 and a heat transmitter 3 are accommodated beside one another In the design forms described below, the heat transmitter 3 is designed advantageously as radiator. The filter fan unit 2 has a fan 4 which sucks pure air from a fresh air chamber which is situated in the region between the fan 4 and a ceiling 6 of the housing 1 Below the fan 4 there is a filter 7 which is designed in the known fashion and through which the pure air flows into the clean room. The filter fan unit 2 is separated by a separating wall 8 from a room 9 housing the radiator 3. the separating wall 8 is provided with an opening 10 which joins the housing room 9 to the fresh air chamber 5. The filter 7 lies at a small distance above the fresh air screen 11, through which the fresh air enters the clean room. The radiator 3 is provided in the region above a return air screen 12, through which the return air flows to the radiator. In the design example shown, the housing 1 is cuboid-shaped. Of course, it could also have any other suitable shape. Ideally, the ceiling 6 and the side walls 13 to 16 connected at right angles to it are of metal. A sound insulation layer 17 is applied to the inner side of the ceiling 6 The fan 4 is held against a plate 18 which, for example, has a quadratic outline (fig. 2) and at least on two opposite sides a sound insulation layer 19, 20 protrudes and is fastened on to the housing side wall 14 and to the separating wall 8. The sound insulation layer 19 is provided on the inner side of the housing side wall and the opposite-lying sound insulation layer 20 is provided against the separating ,wall 8 which stretches from the housing floor to the housing ceiling 6 between the housing walls 13, 15 lying opposite to one another. The separating wall is ideally made of metal. As shown in fig. 3, the filter 7 is supported by a frame 21, whose frame sides have a somewhat L- shaped cross-section, on the lower arm 22 of the frame 21 in the assembling position lies the filter 7. Parallel to the frame arm angled inwards, the frame 21 has an upper frame arm 23, whose free end is inclined upwards and with which the frame 21 is fastened on to the inner side of the housing side wall 13 to 15 and on to the separating wall 8. The filter lies at a distance below the fan 4, so that a flow space 25 lying between it and the filter gets created. The flow space 25 ensures that the pure air is fed uniformly over the entire face of the filter 7. On the underside of the fan 4, a diverting unit 26 is fixed. It is formed by a plane plate 27 which juts out on all side above the fan 4 and whose outer edge runs perpendicularly upwards. The pure air suctioned (in a method yet to be described) by the fan 4 lands up in the ring space 29 formed between the plate edge 28 and the fan 4, where the pure air flows upwards. As the plate edge 28 ends at a distance below the carrier plate 18, the pure air can exit out of the ring space 29 and reach the flow space 30 between the plate edge 28 and the sound insulation layers 19,20. Here the pure air flows into the flow space 25 into which the flow space 30 passes on. From the flow space 25 onwards the pure air flows through the filter 7 and reaches through the fresh air screen 11 into the clean room below it. The sound insulation layer 17 stretches over the entire inner side of the housing ceiling 6, so that it is also provided in the radiator housing room 9 (fig. 3). In the housing side wall 16 there is an opening 31, to the outer side of which a fresh air connector 32 is joined, through which external air 33 can be supplied. The opening 31 is situated immediately after the ceiling-side sound insulation layer 17 and hence at a distance above the radiator 3. The external air 33 flows at right angles to the return air 34 into the room 9, in which the external air 33 is mixed with the return air 34. The room 9 thus also forms a mixing chamber for the external air and the return air. From the room 9 the mixed air goes through the opening 10 of the separating wall 8 and reached the fresh air chamber 5 between the carrier plate 18 and the ceiling-side sound insulation layer 17. Through the housing ceiling 6 and the sound insulation layer 17, electrical lines 35 for the fan 4 as well as lines 36 for the radiator are guided. The separating wall 8 divides the housing 1 into two housing spaces, out of which the fan-side housing space is greater than the radiator-side housing space 9. - The fresh air screen 11 has fresh air openings arranged distributed over its surface, to which baffle plates 37 placed inclined and running parallel to one another are joined. They stretch inclined from the opening edge in the direction towards the housing space 9 for the radiator 3. In this way, the fresh air 38 initially enters inclined into the clean room situated below it. On account of the baffle plate 37 the fresh air 38 flows away from the room 9 at an inclination, so that this fresh air does not immediately flow back again via the return air screen to the radiator. Even the return air screen 12 has opening arranged distributed over its surface, to which baffle plates are joined. They also similarly lie parallel and are inversely inclined towards the baffle plates 37 of the fresh air screenll. On using the pure air unit the filtered fresh air 38 flows through the fresh air screen 11 directly into the clean room. Thereafter it flows along with the return air 34 provided with the housed parts through the return air screen 12 to the radiator 3 through which it flows right through. Here the return air 34 is cooled. The radiator 3 lies horizontally somewhat at the height of the filter 7. In the radiator room 9 the return air 34 flows upwards and goes through the opening 10 in the separating wall 8 into the fresh air chamber 5 above the fan 4. If required, external air 33 can be fed into the radiator room 9 via the fresh air connector 32. where the external air 33 gets mixed with the cooled return air 34. In this case, the air mixture enters through the opening 10 into the fresh air chamber 5. In the fresh air chamber 5, the return air flows through an opening 40 (fig. 1) provided in the carrier plate 18 into the fan 4. The carrier plate 18 locks the ring space 29 as well as the flow space 30 upwards against the fresh air chamber 5. The air coming out of the fan 4 goes into the ring space 29 where it is deflected upwards by the plate edge 28 running upwards. Through the flow space 30 surrounding the ring space 29 the fresh air then flows downwards into the flow space 25, which ensures that the fresh air is uniformly distributed over the inlet surface of the filter 7. During passing through of the fresh air 38 through the filter 7, the fresh air is purified and filtered in the known method before entering the clean room once again. Instead of the ring space 29, one can also provide only flow channels on both sides of the fan 4, running parallel to one another, which stretch between the housing side walls 13 and 15 In this case, the air coming out of the fan 4 flows via the plate edges 28 into the flow space 30. As, in the pure air unit, the fan 4, the filter 7 and the radiator 3 are accommodated in a common housing, a cumbersome channel system for feeding the return air is not required. The pure air unit is designed as a module which, for example, can be inserterd into an opening of a screen ceiling 41 Fig 2 and 3 show the carrier rails 42 and 43 of the screen ceiling which cross each other at right-angles. It is however also possible to fix the module suspended against a structure-side ceiling and then join it on the clean room side to a suspended cover, for example made of module plates. In the design example shown in fig. 4, the module is designed symmetrically. The housing la has a quadratic outline structure. To each of two housing sides 14a, 16a lying opposite to one another within the housing la, a fan 4a is connected. Both the fans 4a lie at half the length of the housing side walls 14a, 16a at the same height. They have the same design as the fan 4 as shown in fig. 1 to 3. Below each of the two fans 4a there is a filter 7a having a rectangular outline shape Conforming to the previous design form, the filter 7a stretch between the housing side walls 13a, 15a lying opposite to one another. Besides, the filters 7a stretch between the housing side walls 14a, 16a and the separating walls 8a lying parallel to them, which in turn stretch parallel to the housing side walls 14a, 16a between the housing side walls 13a, 15a. The separating walls 8a separate the fresh air chambers situated in the region above the the fans 4a from the radiator space 9a in which the radiator is accommodated. It is also similarly arranged horizontally in the installation position and stretches according to the previous design form betweeen the housing side walls 13a, 15a lying opposite to one another and running parallel to one another. Besides, the radiator 3a stretches between the separating walls 8a lying parallel to one another. Below the radiator 3a there is again the return air screen, through which the return air flows out of the clean room into the radiator space 9a. On entering through the radiator 3a, the return air is cooled and flows through the openings 10a prvided in the separating walls 8a into the fresh air chambers in the region above the fans 4a. The return air suctioned by the fans 4a can be deflected and guided in the same way, as already described on the basis of fig. 1 to 3. Otherwise, this design form is exactly the same as the design example as shown in the fig. lto 3 Fig. 5 shows a design form, in which the housing lb, corresponding to the design example shown in fig. 4, is divided through the separating walls 8b. Contrary to the previous design form, only a single fan 4b is provided, which is accommodated in the centre space of the housing lb, while in both the spaces joining it, a radiator 3b each is arranged Both the radiators 3b ideally have the same design and stretch between the housing side walls 13b, 15b lying opposite to one another, as well as between the housing side walls 14b, 16b and the separating walls 8b lying parallel to them. The fan 4b is placed centrically in the housing lb. The return air suctioned by the fan 4b flows out of the radiator spaces 9b through corresponding openings in the separating walls 8b into the central fresh air chamber which is situated in the region above the fan 4b In the region below the fan 4b there is the filter 7b which stretches between the housing side walls 13b, 15b lying opposite to one another, as well as between the separating walls 8b joining them at right-angles and which are parallel to one another. Otherwise, this design form is exactly the same as the design example as shown in fig. 1 to 3. On one of the housing side walls, a fresh air connector can be provided, in order to feed external air to the radiator space 9b. A suitable fresh air connector can also be provided in the design example as shown in fig. 4. Fig. 6 shows the possibility of accommodating the radiator 3c not horizontally but in an inclined position within the radiator space 9c. This inclined position has the advantage that the radiator space can be kept very narrow, so that even the corresponding housing lc has small outer measurements. The cooling effect is not hampered by the inclined position of the radiator 3c. The inclined positioned radiator 13 is fixed with holder rails 44, 45 on to the housing floor, as well as to the housing side wall. Such an inclined-arranged radiator can be provided in the case of the design examples described before, so that the corresponding modules would have small measurements. In a further (not shown) deisgn form, the fan is situated in the region above the radiator. In this case, the return air flows through the return air screen and through the radiator before it reaches the fan situated above it. From there the air is deflected to the filters which stretch in the region beside the radiator above fresh air screens. The radiator is ideally place centrally and separated from the filters by separating walls, so that in any case the return air must flow through the radiator and the fan before reaching the filters, In the design form as shown in fig. 7 and 8, the radiator is situated in the space 9d and a prefilter is pre-connected to it. It sits in a flow channel 60 for the return air 34. The filter-fan-unit 2 is inserted into the housing Id adjacent to the radiator 3d and has the fan 4d which is suspended on the plate 18d. Corresponding to the design form as shown in fig. 1 to 3, sound insulation layers 19d, 20d are provided, which stretch starting from the filter 7d upto the height of the plate 18d. At a small distance below the fan 4d the deflecting unit is provided, which ideally also should be made of sound insulation material. The air suctioned out of the fresh air chamber 5d then goes downwards out of the fan 4d and is deflected sideways at the deflecting unit 26d. This way the air first lands up in the flow space 30d and subsequently in the flow space 25d. The flow space 30d is designed as ring space and lies in the region between the fan 4d or the deflecting unit 26d and the sound insulation layers 19d, 20d. The flow space 25d is restricted upwards by the deflecting unit 26d. From here onwards the air flows through the filter 7d downwards to the exit (to be described), through which reaches the clean room situated below. The fan 4d, the sound insulation layers 19d, 20d, the deflecting unit 26d and the filter 7d form an assembly unit 47 which is inserted into the housing Id of the pure air unit. The assembly unit 47 has a housing 48 along whose side walls the sound insulation layers 19d, 20d lie. The housing 48 is closed below by the filter 7d. On top the housing 48 is closed by sections of the side walls inclined inwards at right-angles and the plate 18d fixed on them. The assembly unit 47 can be pre-mounted and easily inserted into the housing 1d of the pure air unit. The housing 1d of the pure air unit sits on the installation frame 49, with which the unit can be placed on the screen ceiling 41 or even fixed suspended against a construction-side ceiling, as explained on the basis of the design form shown in fig. 1 to 3. The fresh air connector 32d is provided against the side wall 14d of the housing 1d. In this way, the fresh air connector 32d is situated on the side of the filter-fan-unit 2 which is away from the radiator 3d. this arrangement has the advantage that the air flowing through the radiator 3d into the fresh air chamber 5d, as well as the external air fed through the fresh air connector 32d get symmetrically suctioned from the fan 4d into the fresh air chamber 5d. As explained on the basis of fig. 1 to 3, the return air 34 flows via the radiator 3d into the space 9d and through the opening 10d goes into the fresh air chamber 5d. The air coming out of the fan 4d is deflected radially outwards at the delfecting unit 26d and flows through the flow space 30d into the flow space 25d, and from there through the filter 7d. The flow space 25d ensures that the fresh air is distributed uniformly over the inlet surface of the filter 7d. While passing through the filter 7d the fresh air is purified and filtered in the know method before entering the clean room. On the side wall 16d of the housing 1d, in the upper edge region, there is a thermostatic regulating valve 50 with which the radiator 3d can be regulated. Below the prefilter 46, in the space 9d there is a measuring stud 51, to which a further measuring stud 53 is connected by a measuring line 52; the additional measuring stud is placed in the region beside the fan 4d in the flow space 30d. Through this measuring stud 53, with the help of a measuring sensor connected to the measuring stud 51, the pressure in the flow space 30d can be measured. Besides, the pressure below the filter 7d can be determined with the help of a further (not shown) sensor. From the pressure difference, once can get inferences regarding the load on the filter 7d. In this way one can find out, when the filter 7d has to be cleaned and/or replaced. With both the measuring studs 51 and 53, it is also possible to determine the particle concentration in the flow path of the air before the filter 7d. Particularly while using the pure air unit in the pharmacy industry, one can thus check and monitor the integrity of the air filter 7d. In the region below the prefilter 46 there is a temperature feeler 54 in the flow channel 60, which acts on the thermostatic regulating valve 50. Instead of the thermostatic regulating valve, an electrical or electromotoric regulating valve can also be used. A further temperature feeler can be installed in the flow channel 60, with which the room temperature can be determined. The wall 16d of the housing 1d is provided with a connector 55 through which, if required, the entire or a part of the return air can be fed to a continuous air plant which is post-connected (not shown). The filtered and cooled fresh air 38 exits turbulantly on all sides into the clean room. It distributes itself in the clean room and is suctioned out of the clean room through the return air screen 12d and is cooled again by the heat exchanger 3d. As shown in fig. 8, the return air screen is surrounded on three sides by the fresh air screen lid. The fresh air screen lid has a U-shape and is provided with guide plates, through which the pure air flowing out is blown into the clean room. The guide plates 37d in the individual regions of the fresh air screen 1 1d are set in such a way that the pure air flows in different directions. In fig. 8, the flow-out directions of the pure air are marked by arrows. The guide plates are accordingly set inclined, so that the fresh air 38 exits inclined on to the respective adjacent edge of the housing Id. As explained on the basis of the design form shown in fig. 1 to 3, even the return air screen 12d has the inclined-lying guide plates. These guide plates can be dropped even in the previous design forms. As the return air screen 12d is situated between two sections of the fresh air screen 1 1d (fig. 8), there is a box 56 within the pure air unit in the region above the return air screen 12d, which in appearance has the same outline structure as the return air screen 12d. This box has an inclined wall 57 which stretches inclined downwards. The width of this wall 57, measured perpendicular to the sign level as shown in fig. 7, conforms to the corresponding width of the return air screen 12d. To this wall side walls are joined, which stretch vertically downwards and along the logitudinal edges 58,59 (fig.8) of the return air screen 12d. In this way, the region above the return air screen 12d is flow-technically separated from the adjacent regions of the fresh air screen lid, so that the return air entering the housing 1d through the return air screen does not get mixed with the fresh air 38. At the inclined wall 57 a part of or the eintire return air is deflected to the prefilter 46, which protects the air filter 7d from excessive pollution. The described pure air units are small, modular units which can be excellently applied in the fields of pharmacy, grocery and bio-technology. These modules are self-sufficient units, so that a complicated channel system for feeding the return air is not necesssary. The inner side of the module is smooth, which not only ensures smooth flow, but also the module can be easily cleaned. The temperature regulation as well as the flow volume regulation of the module can ideally take place witha bus system, like a LON. The modules can be easily mounted the the required points within the clean rooms. We Claim 1. A modular pure air unit device for feeding pure air into clean rooms having pharmaceuticals, grocery and bio-technical products, the device comprising atleast one fan means (4, 4a, 4b, 4d); and atleast one heat transmitter (3, 3a, 3b, 3d) operatively connected, and being disposed adjacent to the atleast one fan means, the atleast one heat transmitter configured as a finned tube heat exchanger; the fan means (4,4a, 4b, 4d) having atleast one filter (7,7a, 7b, 7d) through which pure air flowing Into the clean rooms, the fan means (4, 4a, 4b, 4d) drawing air from a fresh air chamber (5, 5d) disposed in a region between the fan means and a ceiling (8), characterized in that a common housing (1, la, lb, Id) is provided to accommodate the atleast one fan means (4,4a, 4b, 4d), the atleast one filter (7, 7a, 7b, 7d), and the atleast one heat transmitter (3, 3a, 3b, 3d) to form a built-in-module so that the fresh air flowing through the atleast one filter (7) directly delivered to the clean rooms and the exiting air from the clean rooms being directly fed to the atleast one heat transmitter (3). 2. The device as claimed in claim 1, wherein the heat transmitter (3,3a, 3b) is separated from the fan means (4,4a, 4b) and from the filter (7,7a, 7b) in the common housing (1, la, lb) by atleast one separating wall (8,8a, 8b) which has atleast one passage (10,10a) through which the return air (34) flows to the fan means (4,4a, 4b). 3. The device as claimed in claim 2, wherein the passage (10, 10a, lOd) leads into the fresh air chamber (5, 5d) which is provided on the suction side of the fan means (4, 4a, 4b, 4d) in the common housing (1, la, lb, 1d). 4. The device as claimed in claims 1 to 3, wherein the (4,4a, 4b, 4d) and the heat transmitter (3, 3a, 3b, 3d) are accommodated at adjacent spaces designed in the common housing. 5. The device as claimed in claims 1 to 4, wherein the heat transmitter (3a) is accommodated in a first middle housing space (9a) of the common housing. 6. The device as claimed in claim 5, wherein a first additional housing space is configured on both sides of the first middle housing space (9a) and wherein the atleast one fen means (4a) with atleast one allocated filter (7a) is accommodated in the first additional housing space. 7. The device as claimed in claims 1 to 4, wherein the atleast one fan means (4b) is accommodated in a second additional housing space. 8. The device as claimed in claim 7, wherein on both sides of the first middle having space (9a), a second middle housing space (9b) is designed, in each of which at least one heat transmitter (3b) is accommodated. 9. The device as claimed in claims 1 to 8, wherein the housing spaces (9,9a to 9b) stretch between atleast two housing side walls (13,13a, 13b; 15, 15a, 15b) lying opposite to one another. 10.The device as claimed in claims 1 to 9, wherein the filter (7, 7a, 7b, 7d) stretches between the housing side walls (13, 13a, 13b; 15, 15a, 15b) lying opposite to one another. 11.The device at claimed in claims 1 to 10, wherein the housing side watts (6, 13 to 16; 13a to 15a; 13b to 16b) ara providad on tha inner side at least partly with a sound insulation layer (17,19,20; 19d, 20d). 12. The device as claimed claims 1 to 11, wherein atleast one feed opening (31) for external air (33) leads into the housing space (9, 9a to 9b) supporting the heat transmitter (3,3a to 3c). 13.The device as claimed in claims 1 to 11, wherein a housing space (9d) supporting the heat transmitter (3d) and atleast one feed opening for external air (33) are provided on opposite sides of the fen (4d). 14.The device as claimed in claims 1 to 13, wherein the heat transmitter (3, 3a, 3b) lies perpendicular to the direction of a return air flow (34). 15.The device as claimed in claims 1 to 13, wherein the heat transmitter (3c) lies at an angle to the direction of the return air flow (34). 16.The device as claimed in claims 1 to 15, wherein an outlet opening for fresh air (38) are designed in such a way that the fresh air (38) is directed away from an inlet opening of the return air. 17.The device as claimed in claims 1 to 16, wherein the common housing (1, 1a, 1b, 1d) can be mounted on a screen ceiling (41). 18. The device as claimed in claims 1 to 16, wherein the common housing (1, 1a, 1b, 1d) can be mounted hanging against a cover. 19.The device as claimed in claims 1 to 18, wherein the fan (4d) and the filter (7d) are combined into one structural unit (47). 20.The device as claimed in claim 19, wherein the structural unit (47) atleast has a sound insulation layer (19d, 20d). 21.The device as claimed in claim 19 or 20, wherein the structural unit (47) has a diverting unit (26d) for tha fresh air post-connected to tha fan (4d). 22.The device as claimed in claims 19 to 21, wharain tha structural unit (47) is intertable into tha common housing (1d). 23.The device as claimed in claims 1 to 22, wharain tha outlet opening for the fresh air (38) and tha Nat opening for tha return air (34) are provided on tha same side of tha common housing (1, la, lb, Id). 24.The device as claimed in claim 23, wharain tha outlet opening constitutes a part of a fresh air screen (11, 11d) which atleast partly surrounds a return air screen (12d) containing tha inlet opening. 25.The device as claimed in claims 1 to 24, wharain atleast one profiteer (46) is provided in tha flow path of tha return air (34) before the fan (4d). The invention relates to a modular pure air unit device for feeding pura ar into clean rooms having pharmaceuticals, grocery and bio-technical products, the device comprising atieast one fan means (4, 4a, 4b, 4d); and atleast one beat transmitter (3,3a, 3b, 3d) operatively connected, and being disposed adjacent to the atlaast one fan means, the atleast one heat transmitter configured as a finned tube heat exchanger; the fan means (4, 4a, 4b, 4d) having atleast one filter (7,7a, 7b, 7d) through which pure air flowing into the clean rooms, the fan means (4,4a, 4b, 4d) drawing air from a fresh air chamber (5,5d) disposed in a region between the fen means and a ceiling (ft), e common housing (1, la, lb, 1d) is provided to accommodate the atlaast one fan means (4,4a, 4b, 4d), the atleast one filter (7, 7a, 7b, 7d), and the atlaast one heat transmitter (3,3a, 3b, 3d) to form a built-in-module so that the fresh air flowing through the atieast one filter (7) directly delivered to the clean rooms and the exiting air from the clean rooms being directly fed to the atleast one heat transmitter (3).

Full Text

The invention relates to a pure air unit for the phramacy-,
grocery- and bio-technical industry.
More particularly, the invention relates to a modular pure
air unit device for feeding pure air into clean rooms having
phramaceutical, grocery and biotechnical product.
It is known in the pharmacy- and bio-technical industry how
to handle corresponding products outside a clean room of the
category A and also in clean rooms of the categories B, C and
D. Pure air is fed into these clean rooms through filters which
are arranged in the ceiling of the corresponding clean room.The
pure air is fed through channels of circulating air units which
are connected to at least one external air device which is
situated in the region outside the clean rooms, These pure air
units have a cumbersome design due to the channel system for
feeding fresh air and therefore require a corresponding
installation space.
It is the task of this invention to design the generic pure
air unit in such a way that the fresh air can be fed reliably
into the respective clean rooms with a simpler design and more
compact measurements. This task is fulfilled in the generic pure
air unit as per the features of the invention.
In the pure air unit as per the invention, the fan, the
filter and the heat transmitter are accommodated in a common
housing . Therefore, cumbersome channels for feeding the fresh
air or return guiding of the return air are no longer required.
The fresh air flowing through the filter lands directly into the
clean room, while the return air coming out of the clean room is
directly fed to the heat transmitter. The pure air unit as per
the invention is therefore is design-wise simpler and can be
built without much complication. On account of the design as per
the invention, the pure air unit designed as a modular unit has
only small measurements, so that the pure air unit can also be
installed in places where only small installation space is
available.
Further features of the invention can be obtained from the
further claims, the description and the accompanying drawings.
The invention is described in more details on the basis of a
few design examples shown in the drawings. The following are
shown:
Fig. 1 A pure air unit as per the invention in perspective
view;
Fig. 2 The pure air unit as per figure 1, in top view;
Fig 3 A section along the line A-A in fig. 2;
Fig 4 A second design form of a pure air unit as per the invention, in top view;
Fig. 5 Top view of a third design form of a pure air unit as per the invention;
Fig. 6 In section, a further design form of a heat transmitter of a pure air unit as per the invention;
Fig. 7 In a depiction corresponding to fig. 4, a further design form of a pur air unit as per the
invention;
Fig. 8 The pure air unit as shown in fig. 7, in a view inclined from below.
The pure air unit is meant for application in the pharmacy or grocedry industry or even in the area of
bio-technology. The pure air unit is designed as a module and is used in the clean room category B, C
and D. The pure air unit according to fig. 1 to 3 has a housing 1, in which a filter fan unit 2 and a heat
transmitter 3 are accommodated beside one another In the design forms described below, the heat
transmitter 3 is designed advantageously as radiator. The filter fan unit 2 has a fan 4 which sucks pure
air from a fresh air chamber which is situated in the region between the fan 4 and a ceiling 6 of the
housing 1 Below the fan 4 there is a filter 7 which is designed in the known fashion and through which
the pure air flows into the clean room.
The filter fan unit 2 is separated by a separating wall 8 from a room 9 housing the radiator 3. the
separating wall 8 is provided with an opening 10 which joins the housing room 9 to the fresh air
chamber 5.
The filter 7 lies at a small distance above the fresh air screen 11, through which the fresh air enters the
clean room. The radiator 3 is provided in the region above a return air screen 12, through which the
return air flows to the radiator.
In the design example shown, the housing 1 is cuboid-shaped. Of course, it could also have any other
suitable shape. Ideally, the ceiling 6 and the side walls 13 to 16 connected at right angles to it are of
metal. A sound insulation layer 17 is applied to the inner side of the ceiling 6
The fan 4 is held against a plate 18 which, for example, has a quadratic outline (fig. 2) and at least on
two opposite sides a sound insulation layer 19, 20 protrudes and is fastened on to the housing side wall
14 and to the separating wall 8. The sound insulation layer 19 is provided on the inner side of the
housing side wall and the opposite-lying sound insulation layer 20 is provided against the separating
,wall 8 which stretches from the housing floor to the housing ceiling 6 between the housing walls 13,
15 lying opposite to one another. The separating wall is ideally made of metal.
As shown in fig. 3, the filter 7 is supported by a frame 21, whose frame sides have a somewhat L-
shaped cross-section, on the lower arm 22 of the frame 21 in the assembling position lies the filter 7.
Parallel to the frame arm angled inwards, the frame 21 has an upper frame arm 23, whose free end is
inclined upwards and with which the frame 21 is fastened on to the inner side of the housing side wall
13 to 15 and on to the separating wall 8.
The filter lies at a distance below the fan 4, so that a flow space 25 lying between it and the filter gets
created. The flow space 25 ensures that the pure air is fed uniformly over the entire face of the filter 7.
On the underside of the fan 4, a diverting unit 26 is fixed. It is formed by a plane plate 27 which juts
out on all side above the fan 4 and whose outer edge runs perpendicularly upwards. The pure air
suctioned (in a method yet to be described) by the fan 4 lands up in the ring space 29 formed between
the plate edge 28 and the fan 4, where the pure air flows upwards. As the plate edge 28 ends at a
distance below the carrier plate 18, the pure air can exit out of the ring space 29 and reach the flow
space 30 between the plate edge 28 and the sound insulation layers 19,20. Here the pure air flows into
the flow space 25 into which the flow space 30 passes on. From the flow space 25 onwards the pure
air flows through the filter 7 and reaches through the fresh air screen 11 into the clean room below it.
The sound insulation layer 17 stretches over the entire inner side of the housing ceiling 6, so that it is
also provided in the radiator housing room 9 (fig. 3). In the housing side wall 16 there is an opening
31, to the outer side of which a fresh air connector 32 is joined, through which external air 33 can be
supplied. The opening 31 is situated immediately after the ceiling-side sound insulation layer 17 and
hence at a distance above the radiator 3. The external air 33 flows at right angles to the return air 34
into the room 9, in which the external air 33 is mixed with the return air 34. The room 9 thus also
forms a mixing chamber for the external air and the return air. From the room 9 the mixed air goes
through the opening 10 of the separating wall 8 and reached the fresh air chamber 5 between the
carrier plate 18 and the ceiling-side sound insulation layer 17.
Through the housing ceiling 6 and the sound insulation layer 17, electrical lines 35 for the fan 4 as
well as lines 36 for the radiator are guided.
The separating wall 8 divides the housing 1 into two housing spaces, out of which the fan-side housing
space is greater than the radiator-side housing space 9.
- The fresh air screen 11 has fresh air openings arranged distributed over its surface, to which baffle
plates 37 placed inclined and running parallel to one another are joined. They stretch inclined from the
opening edge in the direction towards the housing space 9 for the radiator 3. In this way, the fresh air
38 initially enters inclined into the clean room situated below it. On account of the baffle plate 37 the
fresh air 38 flows away from the room 9 at an inclination, so that this fresh air does not immediately
flow back again via the return air screen to the radiator.
Even the return air screen 12 has opening arranged distributed over its surface, to which baffle plates
are joined. They also similarly lie parallel and are inversely inclined towards the baffle plates 37 of the
fresh air screenll.
On using the pure air unit the filtered fresh air 38 flows through the fresh air screen 11 directly into the
clean room. Thereafter it flows along with the return air 34 provided with the housed parts through the
return air screen 12 to the radiator 3 through which it flows right through. Here the return air 34 is
cooled. The radiator 3 lies horizontally somewhat at the height of the filter 7. In the radiator room 9
the return air 34 flows upwards and goes through the opening 10 in the separating wall 8 into the fresh
air chamber 5 above the fan 4. If required, external air 33 can be fed into the radiator room 9 via the
fresh air connector 32. where the external air 33 gets mixed with the cooled return air 34. In this case,
the air mixture enters through the opening 10 into the fresh air chamber 5. In the fresh air chamber 5,
the return air flows through an opening 40 (fig. 1) provided in the carrier plate 18 into the fan 4. The
carrier plate 18 locks the ring space 29 as well as the flow space 30 upwards against the fresh air
chamber 5. The air coming out of the fan 4 goes into the ring space 29 where it is deflected upwards
by the plate edge 28 running upwards. Through the flow space 30 surrounding the ring space 29 the
fresh air then flows downwards into the flow space 25, which ensures that the fresh air is uniformly
distributed over the inlet surface of the filter 7. During passing through of the fresh air 38 through the
filter 7, the fresh air is purified and filtered in the known method before entering the clean room once
again.
Instead of the ring space 29, one can also provide only flow channels on both sides of the fan 4,
running parallel to one another, which stretch between the housing side walls 13 and 15 In this case,
the air coming out of the fan 4 flows via the plate edges 28 into the flow space 30.
As, in the pure air unit, the fan 4, the filter 7 and the radiator 3 are accommodated in a common
housing, a cumbersome channel system for feeding the return air is not required. The pure air unit is
designed as a module which, for example, can be inserterd into an opening of a screen ceiling 41 Fig
2 and 3 show the carrier rails 42 and 43 of the screen ceiling which cross each other at right-angles. It
is however also possible to fix the module suspended against a structure-side ceiling and then join it
on the clean room side to a suspended cover, for example made of module plates.
In the design example shown in fig. 4, the module is designed symmetrically. The housing la has a
quadratic outline structure. To each of two housing sides 14a, 16a lying opposite to one another within
the housing la, a fan 4a is connected. Both the fans 4a lie at half the length of the housing side walls
14a, 16a at the same height. They have the same design as the fan 4 as shown in fig. 1 to 3.
Below each of the two fans 4a there is a filter 7a having a rectangular outline shape Conforming to the
previous design form, the filter 7a stretch between the housing side walls 13a, 15a lying opposite to
one another. Besides, the filters 7a stretch between the housing side walls 14a, 16a and the separating
walls 8a lying parallel to them, which in turn stretch parallel to the housing side walls 14a, 16a
between the housing side walls 13a, 15a. The separating walls 8a separate the fresh air chambers
situated in the region above the the fans 4a from the radiator space 9a in which the radiator is
accommodated. It is also similarly arranged horizontally in the installation position and stretches
according to the previous design form betweeen the housing side walls 13a, 15a lying opposite to one
another and running parallel to one another. Besides, the radiator 3a stretches between the separating
walls 8a lying parallel to one another. Below the radiator 3a there is again the return air screen,
through which the return air flows out of the clean room into the radiator space 9a. On entering
through the radiator 3a, the return air is cooled and flows through the openings 10a prvided in the
separating walls 8a into the fresh air chambers in the region above the fans 4a. The return air suctioned
by the fans 4a can be deflected and guided in the same way, as already described on the basis of fig. 1
to 3. Otherwise, this design form is exactly the same as the design example as shown in the fig. lto 3
Fig. 5 shows a design form, in which the housing lb, corresponding to the design example shown in
fig. 4, is divided through the separating walls 8b. Contrary to the previous design form, only a single
fan 4b is provided, which is accommodated in the centre space of the housing lb, while in both the
spaces joining it, a radiator 3b each is arranged Both the radiators 3b ideally have the same design and
stretch between the housing side walls 13b, 15b lying opposite to one another, as well as between the
housing side walls 14b, 16b and the separating walls 8b lying parallel to them. The fan 4b is placed
centrically in the housing lb.
The return air suctioned by the fan 4b flows out of the radiator spaces 9b through corresponding
openings in the separating walls 8b into the central fresh air chamber which is situated in the region
above the fan 4b In the region below the fan 4b there is the filter 7b which stretches between the
housing side walls 13b, 15b lying opposite to one another, as well as between the separating walls 8b
joining them at right-angles and which are parallel to one another. Otherwise, this design form is
exactly the same as the design example as shown in fig. 1 to 3. On one of the housing side walls, a
fresh air connector can be provided, in order to feed external air to the radiator space 9b. A suitable
fresh air connector can also be provided in the design example as shown in fig. 4.
Fig. 6 shows the possibility of accommodating the radiator 3c not horizontally but in an inclined
position within the radiator space 9c. This inclined position has the advantage that the radiator space
can be kept very narrow, so that even the corresponding housing lc has small outer measurements.
The cooling effect is not hampered by the inclined position of the radiator 3c.
The inclined positioned radiator 13 is fixed with holder rails 44, 45 on to the housing floor, as well as
to the housing side wall. Such an inclined-arranged radiator can be provided in the case of the design
examples described before, so that the corresponding modules would have small measurements.
In a further (not shown) deisgn form, the fan is situated in the region above the radiator. In this case,
the return air flows through the return air screen and through the radiator before it reaches the fan
situated above it. From there the air is deflected to the filters which stretch in the region beside the
radiator above fresh air screens. The radiator is ideally place centrally and separated from the filters by
separating walls, so that in any case the return air must flow through the radiator and the fan before
reaching the filters,
In the design form as shown in fig. 7 and 8, the radiator is situated in the space 9d and a prefilter is
pre-connected to it. It sits in a flow channel 60 for the return air 34. The filter-fan-unit 2 is
inserted into the housing Id adjacent to the radiator 3d and has the fan 4d which is suspended on
the plate 18d. Corresponding to the design form as shown in fig. 1 to 3, sound insulation layers 19d,
20d are provided, which stretch starting from the filter 7d upto the height of the plate 18d.
At a small distance below the fan 4d the deflecting unit is provided, which ideally also should be made
of sound insulation material. The air suctioned out of the fresh air chamber 5d then goes downwards
out of the fan 4d and is deflected sideways at the deflecting unit 26d. This way the air first lands up in
the flow space 30d and subsequently in the flow space 25d. The flow space 30d is designed as ring
space and lies in the region between the fan 4d or the deflecting unit 26d and the sound insulation
layers 19d, 20d. The flow space 25d is restricted upwards by the deflecting unit 26d. From here
onwards the air flows through the filter 7d downwards to the exit (to be described), through which
reaches the clean room situated below.
The fan 4d, the sound insulation layers 19d, 20d, the deflecting unit 26d and the filter 7d form an
assembly unit 47 which is inserted into the housing Id of the pure air unit. The assembly unit 47 has a
housing 48 along whose side walls the sound insulation layers 19d, 20d lie. The housing 48 is closed
below by the filter 7d. On top the housing 48 is closed by sections of the side walls inclined inwards at
right-angles and the plate 18d fixed on them. The assembly unit 47 can be pre-mounted and easily
inserted into the housing 1d of the pure air unit.
The housing 1d of the pure air unit sits on the installation frame 49, with which the unit can be placed
on the screen ceiling 41 or even fixed suspended against a construction-side ceiling, as explained on
the basis of the design form shown in fig. 1 to 3.
The fresh air connector 32d is provided against the side wall 14d of the housing 1d. In this way, the
fresh air connector 32d is situated on the side of the filter-fan-unit 2 which is away from the radiator
3d. this arrangement has the advantage that the air flowing through the radiator 3d into the fresh air
chamber 5d, as well as the external air fed through the fresh air connector 32d get symmetrically
suctioned from the fan 4d into the fresh air chamber 5d.
As explained on the basis of fig. 1 to 3, the return air 34 flows via the radiator 3d into the space 9d and
through the opening 10d goes into the fresh air chamber 5d. The air coming out of the fan 4d is
deflected radially outwards at the delfecting unit 26d and flows through the flow space 30d into the
flow space 25d, and from there through the filter 7d. The flow space 25d ensures that the fresh air is
distributed uniformly over the inlet surface of the filter 7d. While passing through the filter 7d the
fresh air is purified and filtered in the know method before entering the clean room.
On the side wall 16d of the housing 1d, in the upper edge region, there is a thermostatic regulating
valve 50 with which the radiator 3d can be regulated.
Below the prefilter 46, in the space 9d there is a measuring stud 51, to which a further measuring
stud 53 is connected by a measuring line 52; the additional measuring stud is placed in the region
beside the fan 4d in the flow space 30d. Through this measuring stud 53, with the help of a
measuring sensor connected to the measuring stud 51, the pressure in the flow space 30d can be
measured. Besides, the pressure below the filter 7d can be determined with the help of a further (not
shown) sensor. From the pressure difference, once can get inferences regarding the load on the filter
7d. In this way one can find out, when the filter 7d has to be cleaned and/or replaced. With both the
measuring studs 51 and 53, it is also possible to determine the particle concentration in the flow path
of the air before the filter 7d.
Particularly while using the pure air unit in the pharmacy industry, one can thus check and monitor the
integrity of the air filter 7d.
In the region below the prefilter 46 there is a temperature feeler 54 in the flow channel 60, which acts
on the thermostatic regulating valve 50. Instead of the thermostatic regulating valve, an
electrical or electromotoric regulating valve can also be used. A further temperature feeler can
be installed in the flow channel 60, with which the room temperature can be determined.
The wall 16d of the housing 1d is provided with a connector 55 through which, if required, the entire
or a part of the return air can be fed to a continuous air plant which is post-connected (not shown).
The filtered and cooled fresh air 38 exits turbulantly on all sides into the clean room. It distributes
itself in the clean room and is suctioned out of the clean room through the return air screen 12d and is
cooled again by the heat exchanger 3d.
As shown in fig. 8, the return air screen is surrounded on three sides by the fresh air screen lid. The
fresh air screen lid has a U-shape and is provided with guide plates, through which the pure air
flowing out is blown into the clean room. The guide plates 37d in the individual regions of the fresh
air screen 1 1d are set in such a way that the pure air flows in different directions. In fig. 8, the flow-out
directions of the pure air are marked by arrows. The guide plates are accordingly set inclined, so that
the fresh air 38 exits inclined on to the respective adjacent edge of the housing Id.
As explained on the basis of the design form shown in fig. 1 to 3, even the return air screen 12d has
the inclined-lying guide plates. These guide plates can be dropped even in the previous design
forms. As the return air screen 12d is situated between two sections of the fresh air screen 1 1d (fig. 8),
there is a box 56 within the pure air unit in the region above the return air screen 12d, which in
appearance has the same outline structure as the return air screen 12d. This box has an inclined wall 57
which stretches inclined downwards. The width of this wall 57, measured perpendicular to the sign
level as shown in fig. 7, conforms to the corresponding width of the return air screen 12d. To this wall
side walls are joined, which stretch vertically downwards and along the logitudinal edges 58,59 (fig.8)
of the return air screen 12d. In this way, the region above the return air screen 12d is flow-technically
separated from the adjacent regions of the fresh air screen lid, so that the return air entering the
housing 1d through the return air screen does not get mixed with the fresh air 38. At the inclined wall
57 a part of or the eintire return air is deflected to the prefilter 46, which protects the air filter 7d from
excessive pollution.
The described pure air units are small, modular units which can be excellently applied in the fields of
pharmacy, grocery and bio-technology. These modules are self-sufficient units, so that a complicated
channel system for feeding the return air is not necesssary. The inner side of the module is smooth,
which not only ensures smooth flow, but also the module can be easily cleaned. The temperature
regulation as well as the flow volume regulation of the module can ideally take place witha bus
system, like a LON. The modules can be easily mounted the the required points within the clean
rooms.
We Claim
1. A modular pure air unit device for feeding pure air into clean rooms
having pharmaceuticals, grocery and bio-technical products, the device
comprising atleast one fan means (4, 4a, 4b, 4d); and atleast one heat
transmitter (3, 3a, 3b, 3d) operatively connected, and being disposed
adjacent to the atleast one fan means, the atleast one heat transmitter
configured as a finned tube heat exchanger; the fan means (4,4a, 4b, 4d)
having atleast one filter (7,7a, 7b, 7d) through which pure air flowing Into
the clean rooms, the fan means (4, 4a, 4b, 4d) drawing air from a fresh
air chamber (5, 5d) disposed in a region between the fan means and a
ceiling (8), characterized in that a common housing (1, la, lb, Id) is
provided to accommodate the atleast one fan means (4,4a, 4b, 4d), the
atleast one filter (7, 7a, 7b, 7d), and the atleast one heat transmitter (3,
3a, 3b, 3d) to form a built-in-module so that the fresh air flowing through
the atleast one filter (7) directly delivered to the clean rooms and the
exiting air from the clean rooms being directly fed to the atleast one heat
transmitter (3).
2. The device as claimed in claim 1, wherein the heat transmitter (3,3a, 3b)
is separated from the fan means (4,4a, 4b) and from the filter (7,7a, 7b)
in the common housing (1, la, lb) by atleast one separating wall (8,8a,
8b) which has atleast one passage (10,10a) through which the return air
(34) flows to the fan means (4,4a, 4b).
3. The device as claimed in claim 2, wherein the passage (10, 10a, lOd)
leads into the fresh air chamber (5, 5d) which is provided on the suction
side of the fan means (4, 4a, 4b, 4d) in the common housing (1, la, lb,
1d).
4. The device as claimed in claims 1 to 3, wherein the (4,4a, 4b,
4d) and the heat transmitter (3, 3a, 3b, 3d) are accommodated at
adjacent spaces designed in the common housing.
5. The device as claimed in claims 1 to 4, wherein the heat transmitter (3a)
is accommodated in a first middle housing space (9a) of the common
housing.
6. The device as claimed in claim 5, wherein a first additional housing space
is configured on both sides of the first middle housing space (9a) and
wherein the atleast one fen means (4a) with atleast one allocated filter
(7a) is accommodated in the first additional housing space.
7. The device as claimed in claims 1 to 4, wherein the atleast one fan means
(4b) is accommodated in a second additional housing space.
8. The device as claimed in claim 7, wherein on both sides of the first middle
having space (9a), a second middle housing space (9b) is designed, in
each of which at least one heat transmitter (3b) is accommodated.
9. The device as claimed in claims 1 to 8, wherein the housing spaces (9,9a
to 9b) stretch between atleast two housing side walls (13,13a, 13b; 15,
15a, 15b) lying opposite to one another.
10.The device as claimed in claims 1 to 9, wherein the filter (7, 7a, 7b, 7d)
stretches between the housing side walls (13, 13a, 13b; 15, 15a, 15b)
lying opposite to one another.
11.The device at claimed in claims 1 to 10, wherein the housing side watts
(6, 13 to 16; 13a to 15a; 13b to 16b) ara providad on tha inner side at
least partly with a sound insulation layer (17,19,20; 19d, 20d).
12. The device as claimed claims 1 to 11, wherein atleast one feed opening
(31) for external air (33) leads into the housing space (9, 9a to 9b)
supporting the heat transmitter (3,3a to 3c).
13.The device as claimed in claims 1 to 11, wherein a housing space (9d)
supporting the heat transmitter (3d) and atleast one feed opening for
external air (33) are provided on opposite sides of the fen (4d).
14.The device as claimed in claims 1 to 13, wherein the heat transmitter (3,
3a, 3b) lies perpendicular to the direction of a return air flow (34).
15.The device as claimed in claims 1 to 13, wherein the heat transmitter (3c)
lies at an angle to the direction of the return air flow (34).
16.The device as claimed in claims 1 to 15, wherein an outlet opening for
fresh air (38) are designed in such a way that the fresh air (38) is directed
away from an inlet opening of the return air.
17.The device as claimed in claims 1 to 16, wherein the common housing
(1, 1a, 1b, 1d) can be mounted on a screen ceiling (41).
18. The device as claimed in claims 1 to 16, wherein the common housing
(1, 1a, 1b, 1d) can be mounted hanging against a cover.
19.The device as claimed in claims 1 to 18, wherein the fan (4d) and the
filter (7d) are combined into one structural unit (47).
20.The device as claimed in claim 19, wherein the structural unit (47) atleast
has a sound insulation layer (19d, 20d).
21.The device as claimed in claim 19 or 20, wherein the structural unit (47)
has a diverting unit (26d) for tha fresh air post-connected to tha fan (4d).
22.The device as claimed in claims 19 to 21, wharain tha structural unit (47)
is intertable into tha common housing (1d).
23.The device as claimed in claims 1 to 22, wharain tha outlet opening for
the fresh air (38) and tha Nat opening for tha return air (34) are provided
on tha same side of tha common housing (1, la, lb, Id).
24.The device as claimed in claim 23, wharain tha outlet opening constitutes
a part of a fresh air screen (11, 11d) which atleast partly surrounds a
return air screen (12d) containing tha inlet opening.
25.The device as claimed in claims 1 to 24, wharain atleast one profiteer (46)
is provided in tha flow path of tha return air (34) before the fan (4d).

The invention relates to a modular pure air unit device for feeding pura ar into
clean rooms having pharmaceuticals, grocery and bio-technical products, the
device comprising atieast one fan means (4, 4a, 4b, 4d); and atleast one beat
transmitter (3,3a, 3b, 3d) operatively connected, and being disposed adjacent to
the atlaast one fan means, the atleast one heat transmitter configured as a
finned tube heat exchanger; the fan means (4, 4a, 4b, 4d) having atleast one
filter (7,7a, 7b, 7d) through which pure air flowing into the clean rooms, the fan
means (4,4a, 4b, 4d) drawing air from a fresh air chamber (5,5d) disposed in a
region between the fen means and a ceiling (ft), e common housing (1, la, lb,
1d) is provided to accommodate the atlaast one fan means (4,4a, 4b, 4d), the
atleast one filter (7, 7a, 7b, 7d), and the atlaast one heat transmitter (3,3a, 3b,
3d) to form a built-in-module so that the fresh air flowing through the atieast
one filter (7) directly delivered to the clean rooms and the exiting air from the
clean rooms being directly fed to the atleast one heat transmitter (3).

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=DzFMpEQ/cTKUydbU+j00yg==&loc=wDBSZCsAt7zoiVrqcFJsRw==

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Patent Number

272939

Indian Patent Application Number

535/CAL/2000

PG Journal Number

19/2016

Publication Date

06-May-2016

Grant Date

04-May-2016

Date of Filing

18-Sep-2000

Name of Patentee

M & W ZANDER FACILITY ENGINEERING GMBH

Applicant Address

LOTTERBERGSTR. 30, 70499 STUTTGART

Inventors:

#	Inventor's Name	Inventor's Address
1	RENZ MANFRED	HOHE WARTE 21/1, 71254 DITZINGEN

PCT International Classification Number

F24F 3/16

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	29916321.0	1999-09-16	Germany