Title of Invention

SWITCH CUPBOARD WITH DEVICES FOR COOLING THE HOT AIR INSIDE

Abstract

The invention relates to a switchgear cabinet with devices for cooling the heated air being generated therein, wherein at least one vertical side is closed off by means of a double-walled wall element (20), whose outer and inner wall sections (21, 22) form an air conduit (23) with a large surface, wherein several openings (25) are cut, distributed over the inner wall section (22), which can selectively be covered by cover plates (25), fans (26), which can be operated in both directions of rotation, and hose sections (27) with connector plates (28).

Full Text

Switch Cupboard with Devices for Cooling the Hot Air Inside The invention relates to a switchgear cabinet with devices for cooling the heated air being generated therein. Cooling devices, which can be installed on the top of the switchgear cabinet are known, which draw off the heated air from the interior of the switchgear cabinet and return it to the interior of the switchgear cabinet after it has been cooled. Heat exchangers designed as wall elements are known, which take over the same function. These known devices have the disadvantage that they cannot be adapted to various conditions in the interior of the switchgear cabinet. For example, there is the repeated desire to draw off the air in a specific manner from clearly defined locations in the interior, or to directly conduct the returned cooled air to components, which have been mounted at arbitrary locations of the interior. It is the object of the invention to design a switchgear cabinet with devices for cooling the heated air being generated in the interior thereof in such a way, that the air circulation in the interior can easily be adapted to various conditions. In accordance with the invention, this object is attained in that at least one vertical side is closed off with a double- walled wall element, whose outer and inner wall sections form an air conduit with a large surface, and that several openings are cut, distributed over the inner wall section, which can selectively be covered by cover plates, fans, which can be operated in both directions of rotation, and hose sections with connector plates. Depending on the covering of the openings, it is possible by means of the fans to draw off or blow in air at all these locations having openings. The same applies for the hose sections, which in this case can be brought to exactly defined components, which are arbitrarily distributed over the interior. Openings which are not used can be covered with the cover plates. Equipping the inner wall section as a part of the heat exchanger can be varied in many ways and optimally adapted to the conditions prevailing in the interior. In accordance with a preferred embodiment, the openings have been distributed in a grid pattern in the inner wall section. In this connection it is possible to additionally provide that the inner wall section is put together from several vertically divided wall panels. An advantageous embodiment provides for the openings to have a square cross section. If fans are used, whose input and output connecting planes are at an acute angle in respect to each other, the "fans can be attached in any arbitrarily rotated position to the square openings, and in this way the directions in which the air flow is drawn off or blown in can be oriented in different directions. The fans can preferably be operated as suction blowers and pressure blowers. If the hose sections are designed to be resilient, their open ends can easily be guided to the components arranged at arbitrary locations in the interior of the switchgear cabinet. It is possible to charge the components with cooled air in a specific manner. It is also possible to draw off the heated air emitted by the components in a specific manner. The double-walled wall element is embodied as a heat exchanger, wherein the air conduit with a large surface provides a steep temperature gradient when filled with warm air. Good efficiency is achieved with this by means of the heat exchanger. The double-walled wall element can close off a lateral wall or the rear wall of the switchgear cabinet. However, it can also be designed to be the switchgear cabinet, door. The invention will be explained in greater detail by means of an exemplary embodiment, shown in a perspective partial view in the drawings. The switchgear cabinet of the exemplary embodiment has a rack 10, which is composed of vertical and horizontal frame legs 11, 12, 13, 14 and 15, whose sides are or can be closed off by means of wall elements and at least one switchgear cabinet door. As the partial view shows, a vertical side, for example, of the rack 10 is closed off by means of a double-walled wall element 20, which consists of an outer wall section 21 and an inner wall section 22. Both wall sections 21 and 22 form a heat exchanger with a large surface with an air conduit 23 of a correspondingly large surface between the wall sections 21 and 22. The inner wall section 22 can also be divided into several wall panels in the vertical direction. Openings 25 have been cut in a grid shape, distributed over the entire surface of the inner wall section 21, which can be selectively covered by means of cover plates 26, fans 26, which can be operated in both directions of rotation, or connector plates 28 with hose sections 27. Equipping the openings 25 with these three built-in elements can be arbitrarily selected and optimally matched to the conditions prevailing in the interior of the switchgear cabinet and the distribution of the built-ins. For example, the heat absorbed by a cooling element 3 0 can be directly removed via a hose section 27, if the hose section is brought directly to this cooling element 30. By means of the fans 26 it is possible to draw-off heated air or to blow in cold air at all those locations of the inner wall section 22 at which openings 25 have been provided, if these fans 26 can be operated as suction and pressure blowers. Openings 25 which are not used are closed off by means of cover plates 28 in order to achieve defined flow conditions in the interior of the switchgear cabinet and over the heat exchanger. If the input and the output connecting planes of the fan 26 are arranged at an acute angle in respect to each other, the fan 26 can be attached to the square opening 25 in any arbitrarily rotated position. In this way the draw-in and blow-in directions of the fan 26 can be oriented in different directions, as can be seen from the two fans 2 6 represented in the drawings. The double-walled wall element 20 as the heat exchanger can also constitute the rear wall of the switchgear cabinet. However, it can also be embodied as the cabinet door. We Claim: 1. A switchgear cabinet with devices for cooling the heated air being generated therein, wherein at least one vertical side is closed off by means of a double-walled wall element (20), whose outer and inner wall sections (21, 22) form an air conduit (23) with a large surface, wherein several openings (25) are cut, distributed over the inner wall section (22), which can selectively be covered by cover plates (25) , fans (26), which can be operated in both directions of rotation, and hose sections (27) with connector plates (28). 2. The switchgear cabinet as claimed in claim 1, wherein the openings (25) are distributed in a grid shape over the entire surface of the inner wall section (22). 3. The switchgear cabinet as claimed in claim 1 or 2, wherein the inner wall section (22) is put together from several, vertically divided wall panels. 4. The switchgear cabinet as claimed in claims 1 to 3, wherein the openings (25) have square cross sections. 5. The switchgear cabinet as claimed in any one of claims 1 to 4, wherein fans (26) are employed, whose input and output connecting planes are at an acute angle in respect to each other. 6. The switchgear cabinet as claimed in any one of claims 1 to 5, wherein the fans (26) can be operated as suction or pressure blowers. 7. The switchgear cabinet as claimed in any one of claims 1 to 6, wherein the hose sections (27) are designed to be resilient. 8. The switchgear cabinet as claimed in any one of claims 1 to 7, wherein the double-walled wall element (20) is designed as a heat exchanger. 9. The switchgear cabinet as claimed in any one of claims 1 to 8, wherein the double walled wall element (20) is designed as the lateral or rear wall of the switchgear cabinet. 10. The switchgear cabinet as claimed in any one of claims 1 to 8, wherein the double-walled wall element (20) is designed as the switchgear cabinet door. The invention relates to a switchgear cabinet with devices for cooling the heated air being generated therein, wherein at least one vertical side is closed off by means of a double-walled wall element (20), whose outer and inner wall sections (21, 22) form an air conduit (23) with a large surface, wherein several openings (25) are cut, distributed over the inner wall section (22), which can selectively be covered by cover plates (25), fans (26), which can be operated in both directions of rotation, and hose sections (27) with connector plates (28).

Documents:

in-pct-1999-77-kol-granted-abstract.pdf

in-pct-1999-77-kol-granted-claims.pdf

in-pct-1999-77-kol-granted-correspondence.pdf

in-pct-1999-77-kol-granted-description (complete).pdf

in-pct-1999-77-kol-granted-drawings.pdf

in-pct-1999-77-kol-granted-examination report.pdf

in-pct-1999-77-kol-granted-form 1.pdf

in-pct-1999-77-kol-granted-form 18.pdf

in-pct-1999-77-kol-granted-form 2.pdf

in-pct-1999-77-kol-granted-form 3.pdf

in-pct-1999-77-kol-granted-form 5.pdf

in-pct-1999-77-kol-granted-pa.pdf

in-pct-1999-77-kol-granted-reply to examination report.pdf

in-pct-1999-77-kol-granted-specification.pdf

in-pct-1999-77-kol-granted-translated copy of priority document.pdf