Title of Invention	AIR CONDITIONER WITH LOW NOISE LEVEL
Abstract	ABSTRACT Air conditioner with low noise level that comprises of a compressor mounted on rubber grommets with sleeve construction, wherein compressor is covered with a soundproof jacket; a bulkhead covered with insulation jacket made up of two layers to reduce resonance effect of noise; twin motors out of which one is condensation fan motor and the other is evaporation fan motor , where both these motors comprises of centrifugal fans for air movement; a tubing system with the compressor to absorb shocks and covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level ;a silencer plate is mounted on condenser fan motor cover to reduce the pulsation of air and a scroll designed around the evaporation fan motor with the help of Computerized fluid dynamics system is used to distribute air uniformly and thereby reduce noise level. 2 3 FEB 2007

Title of Invention

AIR CONDITIONER WITH LOW NOISE LEVEL

Abstract

ABSTRACT Air conditioner with low noise level that comprises of a compressor mounted on rubber grommets with sleeve construction, wherein compressor is covered with a soundproof jacket; a bulkhead covered with insulation jacket made up of two layers to reduce resonance effect of noise; twin motors out of which one is condensation fan motor and the other is evaporation fan motor , where both these motors comprises of centrifugal fans for air movement; a tubing system with the compressor to absorb shocks and covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level ;a silencer plate is mounted on condenser fan motor cover to reduce the pulsation of air and a scroll designed around the evaporation fan motor with the help of Computerized fluid dynamics system is used to distribute air uniformly and thereby reduce noise level. 2 3 FEB 2007

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 of 1970) COMPLETE SPECIFICATION (SECTION 10; rule 13) "AIR CONDITIONER WITH LOW NOISE LEVEL" HITACHI HOME AND LIFE SOLUTIONS (INDIA) LTD. A Company Incorporated Under The Indian Companies Act HITACHI COMPLEX, KARAN NAGAR KADI.DIST. MEHSANA- 382727 GUJARAT STATE , INDIA. The following specification particularly describes the invention and the manner in which it is to be performed: GRANTED 23-2-2007 ORIGINAL 440/MUM/2005 23 FEB 2007 This invention particularly relates to Air Conditioner with low noise level as less as around 43dbA. Background Of The Invention Air conditioner being well known device providing comfortable climate for human by optimizing the climatic parameters like temperature, humidity, room air velocity, and room air quality and noise level. With continuous development of civilization and growth in population, Air-conditioner always remains in great demand through out the world. In present scenario of global warming, demand of air conditioner increases with consideration of factors such as low noise level, less power consumption, and more cooling efficiency of the air conditioner. At present most of the air conditioner manufacturers have made attempts to provide comforts in the filed of saving power consumption and achieving higher cooling efficiency. But one more factor, which remains hidden in the field of comforts provided by air conditioner, is low noise level. The average noise level of available air conditioners is around 51dbA thus failing to provide comforts in the field of noise level. Such air conditioners with higher noise level have following drawbacks.: 1. It disturbs mental peace as well as effects on the work efficiency. 2. It also creates environmental pollution. There are mainly three kind of noises generated in present air conditioners which are: • Noise of compressor • Noise generated due to vibration • Air flow noise Compressor and fan generate most of the noise from the above kinds of noise. These devices have frequency around 100 Hz to 2 KHz. So in the present scenario of comforts provided by air conditioner, customers demand for device, which provides less noise. Objects of the Invention So with the goal of providing comforts in the field of noise level, inventor has proposed an air conditioner with low noise level as less as around 43dbA. The main object of this invention is to obviate all the above-mentioned drawbacks and limitations of existing air conditioners and to provide a tubing system, which is covered with butyl sheet at several places and is mounted on the rubber grommets to reduce vibration noise level. A further object of the invention is to provide a tubing system having suction pipe with such an arrangement so that the shocks or jerks, produced by anticlock movement of compressor can be absorbed. A further object of the invention is to involve a tubing system to reduce pressure of the refrigerant, which increases due to rise in temperature within the air conditioner during its working. A further object of the invention is to provide single capillary design for uniform distribution of refrigerant to evaporator coil. A further object of the invention is to provide compressor covered with a soundproof jacket made up of rubber, which is mounted on rubber grommets to reduce noise of compressor as well as vibration noise. A further object of the invention is to provide an air conditioner that consists of an insulated bulkhead, which is covered with jacket made up of soundproof material to suppress the sound to enter from source to room inside. A further object of the invention is to provide an air conditioner having sleeve construction of rubber grommets with legs of the compressor and motors to reduce vibration noise. A further object of the invention is to use of twin motors incorporated with condensation fan motor and an evaporation fan motor wherein both motors are connected to separate shaft to perform individual function as well as runs with variant speed. A further object of the invention is to use of coated silencer plate, mounted on condensation fan motor that reduces pulsation of air and in turn reduces noise level. A further object of the invention is to provide a scroll, around the evaporation fan motor, which is designed by computerized fluid system and made up of expanded polystyrene, for unique flow of air with the refrigerant. Detail Description Of The Invention Accordingly this invention proposes an air conditioner with low noise level has following components: 1.A compressor, mounted on rubber grommets with sleeve construction, wherein compressor is covered with soundproof jacket. 2.A bulkhead that is covered with insulation jacket made up of two layers wherein outer layer is made up of fire-retarded material while inner layer is made up of insulative material to reduce resonance effect of noise. 3. Twin motors out of which one is condensation fan motor (outdoor) and the other is evaporation fan motor (indoor), where both the motors run independently and are mounted on rubber grommets with sleeve construction. 4. A tubing system, which is covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level in which single capillary design is used for proper distribution of refrigerant flow. It is connected with suction pipe suction pipe with an arrangement to absorb the shocks or jerks, produced by anticlock movement of compressor. 5.A silencer plate coated with zinc is mounted on condenser fan motor cover to reduce the pulsation of air and ultimately to reduce noise level. 6.A scroll, designed around evaporation fan motor with the help of Computerized fluid dynamics system, made up of expanded polystyrene (EPS), is used to distribute air uniformly and designed to get the maximum efficiency and thereby reduce noise level. The invention will now be described with reference to accompanying drawings, wherein Figs. 1 and 2 show top view and side view of air conditioner respectively according to an embodiment of this invention. Figs. 3 and 4 show front view and perspective side view of air conditioner respectively according to an embodiment of this invention. Figs. 5A and 5B show front view and top view of an evaporation fan motor assembly respectively according to an embodiment of this invention Figs. 6A and 6B show front view and top view of condensation fan motor assembly respectively according to an embodiment of this invention Fig. 7A and 7B show top view and front view of compressor with soundproof jacket according to an embodiment of this invention. Fig. 8 shows front view of silencer plate of air conditioner according to an embodiment of this invention. Fig. 9 shows detailing of tubing system along with suction pipe according to an embodiment of this invention. Figs. 10 shows bulkhead according to an embodiment of this invention. Fig. 11 shows discharge pipe according to an embodiment of this invention. Fig. 12 shows cross sectional view of scroll around an evaporation fan motor assembly. Fig. 13 shows capillary unit comprises plurality of circuits according to an invention. Referring to figs. 1, 4 & 7A, 7B, compressor (1), covered with thick soundproof jacket (3) is mounted on rubber grommets (2) made up of natural rubber, preferably neoprene rubber. The soundproof jacket (3), having thickness of 5 -15 mm, preferably 10mm is made up of natural rubber, preferably neoprene rubber, is used to reduce noise. Referring to figs. 2 & 10, bulkhead (4) is covered with insulation jacket (5) having thickness of 15 - 25 mm, preferably 18 mm, comprises of two layers outer layer and inner layer, from which outer layer is made up of wool, preferably made up of natural wool having fire-retarded property, while inner layer is made up of adhesive type insulation; preferably PEFOP-AC SG (POLYURETHENE FOAM WITH ADHESIVE. AC) which has the property to reduce resonance effect of noise. Referring to fig. 1,2, 5A and 5B & 6A and 6B, twin motor technology comprises of inturbo unit (18) and outturbo unit (19) wherein inturbo unit (18) comprises of an evaporation fan motor (7) and outturbo unit (19) comprises of a condensation fan motor (6). Both these motors comprise of conventional centrifugal fans for air movement wherein both motors are connected with separate shaft and thereby they run independently. Condensation fan motor (6) runs with the high speed only while evaporation fan motor (7) runs with three variant speeds like slow, medium or high. So even though evaporation fan motor (7) runs either with low or medium or high speed, condensation fan motor (6) runs only with the high speed. With this arrangement, condensation fan motor (6) passes hot air at high speed to the condensor unit (21) comprises of condensor coil (14), which helps the refrigerant within condensor unit (21) to remain within liquid form thus preserving the refrigerant from evaporation. At the same time evaporation fan motor (7), which runs with three variant speeds, converts liquid refrigerant into gaseous form, sucks cool air released from condensor unit (14) and sends cool air inside the room. Thus this technology helps to maintain the required temperature inside the room even though outside temperature is high. In twin turbo technology system, diameter as well as depth of both the fans is kept large which helps to increase flow of air and improve hydraulic efficiency and thereby reduces consumption of power and also reduces noise level. Both fans consist of comparatively less number of blades, which do not allow the dust and dirt to remain stick with blades. Instead larger fan passages allow dust to pass through. Thus by preventing the deposition of dirt and dust upon the blades, the noise reduces. Both fan motors assembly are mounted on rubber grommets (2) with the help of sleeve construction where sleeve construction means sheet metal (SM) plates (9) are applied between motor legs & rubber grommets (2) to reduce vibration, which is transferred from motor stands to machine. Referring to fig. 4, 9 & 11, tubing system (11) is covered with butyl sheet (13) at several places and mounted on rubber grommets (2). This tubing system (11) is kept comparatively long where the length of tubing system (11) varies from 800 cm to 1500 cm, depends on the capacity of compressor of air conditioner and proportional to size (tones) of compressor. The pressure of refrigerant that passes through tubing system (11) rises with increase in temperature of compressor (1). This tubing system (11) with loops (15) drops this pressure and thereby converts liquid refrigerant to vapour form before entering in compressor (1), so power consumption by compressor (1) reduces. The anti-clock movement of compressor (1) produces jerks when compressor (1) starts or stops. To absorb these jerks, suction pipe (12) is arranged perpendicular to compressor (1). This arrangement reduces the chances of breakage of suction pipe (12), made up of copper and thereby preserves life of tube. In the proposed air conditioner, as shown in fig. 13, single capillary (22) is used to carry refrigerant to circuits (23) which are small pathways of coolant. This single capillary (22) generates uniform flow of refrigerant into plurality of circuits (23) and thereby helps to reduce pulsation of refrigerant through the circuits and enhance life of circuits. Referring to fig. 1,2 & 8, silencer plate (17), coated with zinc, is mounted on condenser fan motor (6) to reduce the pulsation of air thus reducing noise level. Referring to fig. 1,2, 4 &12 scroll (20) is kept around an evaporation fan motor (7) assembly, which is designed with the help of computerized fluid dynamics. The scroll (20), made up of expanded polystyrene (EPS), is used to manage flow of air sucked by inturbo fan motor (6) from the room which is to be cooled and sent to the tubing system (15) for cooling as well as it releases cool air into the room. This directed distribution of air through the scroll (20) helps to reduce noise level by providing an obstacle to the flow of air. CLAIM: 1. Airconditioner with low noise level that mainly comprises of a compressor mounted on rubber grommets with sleeve construction, wherein compressor is covered with a soundproof jacket made up of natural rubber, preferably neoprene rubber; a bulkhead that is covered with insulation jacket made up of two layers wherein outer layer is made up of wool preferably natural wool; while inner layer is made up of PEFOP-AC SG to reduce resonance effect of noise; twin motors out of which one is condensation fan motor (outdoor) and the other is evaporation fan motor (indoor), where both these motors comprises of centrifugal fans for air movement and connected with separate shaft where both the motors run independently and are mounted on rubber grommets with sleeve construction; a tubing system which is arranged perpendicular to the compressor to absorb the shocks or jerks and covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level ;a silencer plate coated with zinc is mounted on condenser fan motor cover to reduce the pulsation of air and ultimately to reduce noise level and a scroll designed around the evaporation fan motor with the help of Computerized fluid dynamics system, made up of expanded polystyrene (EPS), is used to distribute air uniformly and thereby reduce noise level. 2. Airconditioner with low noise level as claimed in claim 1 wherein the tubing system is covered with butyl sheet and is mounted on rubber grommets made up of natural rubber, preferably neoprene rubber at several places, to reduce noise generated by vibration of tubes. 3. Airconditioner with low noise level as claimed in claim 1 & 2, wherein the tubing system has loops at several places to reduce pressure of refrigerant flowing through it. 4. Air conditioner with low noise level as claimed in claim 1, wherein the soundproof jacket has thickness from 5 mm to 15 mm, preferably 10mm. 5. Airconditioner with low noise level as claimed in claim 1, wherein the insulation jacket has thickness of 5 to 25 mm, preferably 18mm. 6. Airconditioner with low noise level as claimed in claim 1 is to use silencer plate, coated with zinc, mounted on condensation fan motor to reduce pulsation of air and ultimately to reduce noise level. 7. Airconditioner with low noise level as herein described and illustrated in the figures of the accompanying drawings. Dated this 30th day of August, 2005. JATIN Y. TRIVEDI (Authorised Agent of the Applicant) To, The Controller of Patents, The Patent Office, Mumbai.

Full Text

FORM 2
THE PATENTS ACT, 1970 (39 of 1970)
COMPLETE SPECIFICATION (SECTION 10; rule 13)
"AIR CONDITIONER WITH LOW NOISE LEVEL"
HITACHI HOME AND LIFE SOLUTIONS (INDIA) LTD.
A Company Incorporated Under The Indian Companies Act
HITACHI COMPLEX, KARAN NAGAR
KADI.DIST. MEHSANA- 382727
GUJARAT STATE , INDIA.
The following specification particularly describes the invention and the manner in which it is to be performed:
GRANTED

23-2-2007
ORIGINAL
440/MUM/2005
23 FEB 2007

This invention particularly relates to Air Conditioner with low noise level as less as around 43dbA.
Background Of The Invention
Air conditioner being well known device providing comfortable climate for human by optimizing the climatic parameters like temperature, humidity, room air velocity, and room air quality and noise level. With continuous development of civilization and growth in population, Air-conditioner always remains in great demand through out the world.
In present scenario of global warming, demand of air conditioner increases with consideration of factors such as low noise level, less power consumption, and more cooling efficiency of the air conditioner. At present most of the air conditioner manufacturers have made attempts to provide comforts in the filed of saving power consumption and achieving higher cooling efficiency. But one more factor, which remains hidden in the field of comforts provided by air conditioner, is low noise level.
The average noise level of available air conditioners is around 51dbA thus failing to provide comforts in the field of noise level. Such air conditioners with higher noise level have following drawbacks.:
1. It disturbs mental peace as well as effects on the work efficiency.
2. It also creates environmental pollution.

There are mainly three kind of noises generated in present air conditioners which are:
• Noise of compressor
• Noise generated due to vibration
• Air flow noise
Compressor and fan generate most of the noise from the above kinds of noise. These devices have frequency around 100 Hz to 2 KHz. So in the present scenario of comforts provided by air conditioner, customers demand for device, which provides less noise.
Objects of the Invention
So with the goal of providing comforts in the field of noise level, inventor has proposed an air conditioner with low noise level as less as around 43dbA.
The main object of this invention is to obviate all the above-mentioned drawbacks and limitations of existing air conditioners and to provide a tubing system, which is covered with butyl sheet at several places and is mounted on the rubber grommets to reduce vibration noise level.
A further object of the invention is to provide a tubing system having suction pipe with such an arrangement so that the shocks or jerks, produced by anticlock movement of compressor can be absorbed.

A further object of the invention is to involve a tubing system to reduce pressure of the refrigerant, which increases due to rise in temperature within the air conditioner during its working.
A further object of the invention is to provide single capillary design for uniform distribution of refrigerant to evaporator coil.
A further object of the invention is to provide compressor covered with a soundproof jacket made up of rubber, which is mounted on rubber grommets to reduce noise of compressor as well as vibration noise.
A further object of the invention is to provide an air conditioner that consists of an insulated bulkhead, which is covered with jacket made up of soundproof material to suppress the sound to enter from source to room inside.
A further object of the invention is to provide an air conditioner having sleeve construction of rubber grommets with legs of the compressor and motors to reduce vibration noise.
A further object of the invention is to use of twin motors incorporated with condensation fan motor and an evaporation fan motor wherein both motors are connected to separate shaft to perform individual function as well as runs with variant speed.
A further object of the invention is to use of coated silencer plate, mounted on condensation fan motor that reduces pulsation of air and in turn reduces noise level.

A further object of the invention is to provide a scroll, around the evaporation fan motor, which is designed by computerized fluid system and made up of expanded polystyrene, for unique flow of air with the refrigerant.
Detail Description Of The Invention
Accordingly this invention proposes an air conditioner with low noise level has following components:
1.A compressor, mounted on rubber grommets with sleeve construction, wherein compressor is covered with soundproof jacket.
2.A bulkhead that is covered with insulation jacket made up of two layers wherein outer layer is made up of fire-retarded material while inner layer is made up of insulative material to reduce resonance effect of noise.
3. Twin motors out of which one is condensation fan motor (outdoor) and the other is evaporation fan motor (indoor), where both the motors run independently and are mounted on rubber grommets with sleeve construction.
4. A tubing system, which is covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level in which single capillary design is used for proper distribution of refrigerant flow. It is connected with suction pipe suction pipe with an arrangement to absorb the shocks or jerks, produced by anticlock movement of compressor.

5.A silencer plate coated with zinc is mounted on condenser fan motor cover to reduce the pulsation of air and ultimately to reduce noise level.
6.A scroll, designed around evaporation fan motor with the help of Computerized fluid dynamics system, made up of expanded polystyrene (EPS), is used to distribute air uniformly and designed to get the maximum efficiency and thereby reduce noise level.
The invention will now be described with reference to accompanying drawings, wherein
Figs. 1 and 2 show top view and side view of air conditioner respectively according to an embodiment of this invention.
Figs. 3 and 4 show front view and perspective side view of air conditioner respectively according to an embodiment of this invention.
Figs. 5A and 5B show front view and top view of an evaporation fan motor assembly respectively according to an embodiment of this invention
Figs. 6A and 6B show front view and top view of condensation fan motor assembly respectively according to an embodiment of this invention
Fig. 7A and 7B show top view and front view of compressor with soundproof jacket according to an embodiment of this invention.
Fig. 8 shows front view of silencer plate of air conditioner according to an embodiment of this invention.

Fig. 9 shows detailing of tubing system along with suction pipe according to an embodiment of this invention.
Figs. 10 shows bulkhead according to an embodiment of this invention.
Fig. 11 shows discharge pipe according to an embodiment of this invention.
Fig. 12 shows cross sectional view of scroll around an evaporation fan motor assembly.
Fig. 13 shows capillary unit comprises plurality of circuits according to an invention.
Referring to figs. 1, 4 & 7A, 7B, compressor (1), covered with thick soundproof jacket (3) is mounted on rubber grommets (2) made up of natural rubber, preferably neoprene rubber. The soundproof jacket (3), having thickness of 5 -15 mm, preferably 10mm is made up of natural rubber, preferably neoprene rubber, is used to reduce noise.
Referring to figs. 2 & 10, bulkhead (4) is covered with insulation jacket (5) having thickness of 15 - 25 mm, preferably 18 mm, comprises of two layers outer layer and inner layer, from which outer layer is made up of wool, preferably made up of natural wool having fire-retarded property, while inner layer is made up of adhesive type insulation; preferably PEFOP-AC SG (POLYURETHENE FOAM WITH ADHESIVE. AC) which has the property to reduce resonance effect of noise.

Referring to fig. 1,2, 5A and 5B & 6A and 6B, twin motor technology comprises of inturbo unit (18) and outturbo unit (19) wherein inturbo unit (18) comprises of an evaporation fan motor (7) and outturbo unit (19) comprises of a condensation fan motor (6). Both these motors comprise of conventional centrifugal fans for air movement wherein both motors are connected with separate shaft and thereby they run independently. Condensation fan motor (6) runs with the high speed only while evaporation fan motor (7) runs with three variant speeds like slow, medium or high. So even though evaporation fan motor (7) runs either with low or medium or high speed, condensation fan motor (6) runs only with the high speed. With this arrangement, condensation fan motor (6) passes hot air at high speed to the condensor unit (21) comprises of condensor coil (14), which helps the refrigerant within condensor unit (21) to remain within liquid form thus preserving the refrigerant from evaporation. At the same time evaporation fan motor (7), which runs with three variant speeds, converts liquid refrigerant into gaseous form, sucks cool air released from condensor unit (14) and sends cool air inside the room. Thus this technology helps to maintain the required temperature inside the room even though outside temperature is high.
In twin turbo technology system, diameter as well as depth of both the fans is kept large which helps to increase flow of air and improve hydraulic efficiency and thereby reduces consumption of power and also reduces noise level. Both fans consist of comparatively less number of blades, which do not allow the dust and dirt to remain stick with blades. Instead larger fan passages allow dust to pass through. Thus by preventing the deposition of dirt and dust upon the blades, the noise reduces. Both fan motors assembly are mounted on rubber grommets

(2) with the help of sleeve construction where sleeve construction means sheet metal (SM) plates (9) are applied between motor legs & rubber grommets (2) to reduce vibration, which is transferred from motor stands to machine.
Referring to fig. 4, 9 & 11, tubing system (11) is covered with butyl sheet (13) at several places and mounted on rubber grommets (2). This tubing system (11) is kept comparatively long where the length of tubing system (11) varies from 800 cm to 1500 cm, depends on the capacity of compressor of air conditioner and proportional to size (tones) of compressor.
The pressure of refrigerant that passes through tubing system (11) rises with increase in temperature of compressor (1). This tubing system (11) with loops (15) drops this pressure and thereby converts liquid refrigerant to vapour form before entering in compressor (1), so power consumption by compressor (1) reduces.
The anti-clock movement of compressor (1) produces jerks when compressor (1) starts or stops. To absorb these jerks, suction pipe (12) is arranged perpendicular to compressor (1). This arrangement reduces the chances of breakage of suction pipe (12), made up of copper and thereby preserves life of tube.
In the proposed air conditioner, as shown in fig. 13, single capillary (22) is used to carry refrigerant to circuits (23) which are small pathways of coolant. This single capillary (22) generates uniform flow of refrigerant into plurality of circuits

(23) and thereby helps to reduce pulsation of refrigerant through the circuits and enhance life of circuits.
Referring to fig. 1,2 & 8, silencer plate (17), coated with zinc, is mounted on condenser fan motor (6) to reduce the pulsation of air thus reducing noise level.
Referring to fig. 1,2, 4 &12 scroll (20) is kept around an evaporation fan motor (7) assembly, which is designed with the help of computerized fluid dynamics. The scroll (20), made up of expanded polystyrene (EPS), is used to manage flow of air sucked by inturbo fan motor (6) from the room which is to be cooled and sent to the tubing system (15) for cooling as well as it releases cool air into the room. This directed distribution of air through the scroll (20) helps to reduce noise level by providing an obstacle to the flow of air.

CLAIM:
1. Airconditioner with low noise level that mainly comprises of a compressor mounted on rubber grommets with sleeve construction, wherein compressor is covered with a soundproof jacket made up of natural rubber, preferably neoprene rubber; a bulkhead that is covered with insulation jacket made up of two layers wherein outer layer is made up of wool preferably natural wool; while inner layer is made up of PEFOP-AC SG to reduce resonance effect of noise; twin motors out of which one is condensation fan motor (outdoor) and the other is evaporation fan motor (indoor), where both these motors comprises of centrifugal fans for air movement and connected with separate shaft where both the motors run independently and are mounted on rubber grommets with sleeve construction; a tubing system which is arranged perpendicular to the compressor to absorb the shocks or jerks and covered with butyl sheet at several places and is mounted on rubber grommets having loops at several places in order to reduce the noise level ;a silencer plate coated with zinc is mounted on condenser fan motor cover to reduce the pulsation of air and ultimately to reduce noise level and a scroll designed around the evaporation fan motor with the help of Computerized fluid dynamics system, made up of expanded polystyrene (EPS), is used to distribute air uniformly and thereby reduce noise level.
2. Airconditioner with low noise level as claimed in claim 1 wherein the tubing system is covered with butyl sheet and is mounted on rubber

grommets made up of natural rubber, preferably neoprene rubber at several places, to reduce noise generated by vibration of tubes.
3. Airconditioner with low noise level as claimed in claim 1 & 2, wherein the tubing system has loops at several places to reduce pressure of refrigerant flowing through it.
4. Air conditioner with low noise level as claimed in claim 1, wherein the soundproof jacket has thickness from 5 mm to 15 mm, preferably 10mm.
5. Airconditioner with low noise level as claimed in claim 1, wherein the insulation jacket has thickness of 5 to 25 mm, preferably 18mm.
6. Airconditioner with low noise level as claimed in claim 1 is to use silencer plate, coated with zinc, mounted on condensation fan motor to reduce pulsation of air and ultimately to reduce noise level.
7. Airconditioner with low noise level as herein described and illustrated in the figures of the accompanying drawings.
Dated this 30th day of August, 2005.
JATIN Y. TRIVEDI (Authorised Agent of the Applicant)
To,
The Controller of Patents, The Patent Office, Mumbai.

Documents:

440-mum-2005-abstract(23-02-2007).pdf

440-mum-2005-abstract-(23-2-2007).doc

440-mum-2005-cancelled pages (23-02-2007).pdf

440-mum-2005-claim(granted)-(23-2-2007).doc

440-mum-2005-claims(granted)-(23-02-2007).pdf

440-mum-2005-claims.doc

440-mum-2005-claims.pdf

440-mum-2005-correspondence(23-02-2007).pdf

440-mum-2005-correspondence(ipo)-(05-11-2007).pdf

440-mum-2005-correspondence-received-ver-030905.pdf

440-mum-2005-correspondence-received-ver-060406.pdf

440-mum-2005-correspondence-received-ver-060905.pdf

440-mum-2005-correspondence-received-ver-171205.pdf

440-mum-2005-description (complete).pdf

440-mum-2005-drawings.pdf

440-mum-2005-form 1(07-04-2005).pdf

440-mum-2005-form 1(23-02-2007).pdf

440-mum-2005-form 18(20-12-2005).pdf

440-mum-2005-form 2(granted)-(23-02-2007).pdf

440-mum-2005-form 2(granted)-(23-2-2007).doc

440-mum-2005-form 26(06-04-2005).pdf

440-mum-2005-form 3(06-04-2005).pdf

440-mum-2005-form 5(06-09-2005).pdf

440-mum-2005-form 9(06-09-2005).pdf

440-mum-2005-form-1.pdf

440-mum-2005-form-18.pdf

440-mum-2005-form-2.doc

440-mum-2005-form-2.pdf

440-mum-2005-form-26.pdf

440-mum-2005-form-3.pdf

440-mum-2005-form-5.pdf

440-mum-2005-form-9.pdf

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Patent Number

211635

Indian Patent Application Number

440/MUM/2005

PG Journal Number

42/2008

Publication Date

17-Oct-2008

Grant Date

05-Nov-2007

Date of Filing

07-Apr-2005

Name of Patentee

HITACHI HOME & LIFE SOLUTION (INDIA) LIMITED

Applicant Address

HITACH COMPLEX, KARAN NAGAR, KADI, DIST. MEHSANA-

Inventors:

#	Inventor's Name	Inventor's Address
1	V.MANJUNATH	HITACH COMPLEX, KARAN NAGAR, KADI, DIST. MEHSANA-382727

PCT International Classification Number

F24F1/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA