Compressor capable of reducing exhaust pulsation

Abstract

The utility model discloses a compressor capable of reducing exhaust pulsation, which comprises a movable disc and a static disc which are meshed together, a rear cover is hermetically mounted on the back of the static disc, a sealing gasket is arranged between the static disc and the rear cover, an exhaust inlet is arranged on the back of the static disc, an exhaust outlet is arranged on the rear cover, and an annular boss is arranged in the rear cover. The inner space of the rear cover is divided into an inner cavity and an outer cavity by the annular boss, the sealing gasket comprises an outer sealing gasket and an inner sealing gasket, the outer sealing gasket is assembled between the edge of the back face of the static disc and the edge of the outer cavity of the rear cover in a sealed mode, the shape and size of the inner sealing gasket are matched with those of the annular boss, and the inner sealing gasket is assembled between the back face of the static disc and the annular boss in a sealed mode. A first groove and a second groove are formed in the back face of the static disc, the first groove and the exhaust inlet are both located in the inner side of the inner sealing gasket, the second groove is located in the outer side of the inner sealing gasket, a gas channel is formed between one end of the second groove and the first groove, and the other end of the second groove is communicated with the exhaust outlet. Exhaust pulsation is reduced through drainage and throttling.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of compressor for reducing exhaust pulsation, belong to automobile air conditioner compressor technical field. BACKGROUND

[0002] Scroll compressor is a kind of compressor commonly used in automobile air conditioner, and the pressure of exhaust gas will fluctuate during compression. These fluctuating gases propagate in the exhaust pipe, which can cause pipe vibration, thereby affecting the steering wheel and other components inside the vehicle. The structure of a scroll compressor in the prior art is shown in Figure 1 , which exhausts from the exhaust inlet on the back of the static disc into the cavity between the static disc and the rear cover first, and then is discharged to the outside of the compressor through the exhaust outlet. In this exhaust method, the volume of exhaust gas changes greatly, resulting in large exhaust pressure fluctuations, which causes pipe vibration and affects the driving experience and passenger comfort. SUMMARY

[0003] The utility model aims to provide a kind of compressor for reducing exhaust pulsation, to solve the problem of pipe vibration caused by large exhaust pressure fluctuations of the compressor in the prior art.

[0004] The utility model adopts the following technical scheme: a kind of compressor for reducing exhaust pulsation, which includes dynamic disc and static disc engaged together, the back of the static disc is sealingly installed with rear cover, sealing gasket is provided between the static disc and the rear cover, the back of the static disc is provided with exhaust inlet, and the rear cover is provided with exhaust outlet, the rear cover is provided with annular boss, and the annular boss separates the internal space of the rear cover into inner cavity and outer cavity, the sealing gasket includes outer sealing gasket and inner sealing gasket, the outer sealing gasket is sealingly assembled between the edge of the back of the static disc and the edge of the outer cavity of the rear cover, the shape and size of the inner sealing gasket are adapted to the annular boss, and the inner sealing gasket is sealingly assembled between the back of the static disc and the annular boss;The back of the static disc is provided with first groove and second groove, the first groove and the exhaust inlet are both located on the inner side of the inner sealing gasket, the second groove is located on the outer side of the inner sealing gasket, a gas passage is provided between one end of the second groove and the first groove, and the other end of the second groove is communicated with the exhaust outlet.

[0005] The first groove adopts a linear structure.

[0006] The second groove adopts C-shaped structure.

[0007] A baffle for blocking airflow is provided at the middle position of the second groove, the baffle is fixed on one side of the second groove, and has a gap between the other side of the second groove.

[0008] There are two baffles, and the two baffles are respectively fixed on the two sides of the second groove.

[0009] The rear cover is provided with a V-shaped groove near the inner side of the outer sealing gasket, and the outer sealing gasket is provided with an oil hole corresponding to the V-shaped groove.

[0010] The baffle is located at the rear part of the V-shaped groove along the direction of the exhaust gas flow.

[0011] The outer sealing gasket and the inner sealing gasket are integrally connected with sealing sheets, and the sealing sheets are two and located at the two end positions of the second groove.

[0012] The elastic valve sheet is provided with a buffer layer on the side attached to the back of the static disc.

[0013] The elastic valve sheet adopts an m-shaped structure, and the m-shaped valve sheet comprises a main body and three elastic sheets fixed on the main body, and the elastic sheet located at the middle part is pressed on the exhaust inlet.

[0014] The utility model discloses a beneficial effect is: the utility model discloses a way of drainage and resistance reduces exhaust pulsation. The airflow is discharged from the exhaust inlet to the space between the annular boss of the rear cover and the static disc, then enters the first recess, then enters the second recess through the gas passage, and finally is discharged from the exhaust outlet, thereby forming long-distance drainage. The process of gas flow is expansion, then throttling and finally expansion again, the first recess is a large-volume cavity, and the airflow from the exhaust inlet to the first recess is an expansion process; the gas passage is small in volume, and the process from the first recess to the gas passage is throttling; the second recess is a large-volume cavity, and the process from the gas passage to the second recess is an expansion process; because the flow rate and flow volume can be reduced through narrow flow channels, the gas flow rate is reduced after passing through the gas passage, and the gas passage realizes the function of resistance. In conclusion, the utility model can reduce the impact force of gas reaching the exhaust outlet, thereby reducing exhaust pulsation and improving user experience.

[0015] Preferably, a baffle is arranged in the second recess, and the airflow hits the baffle during exhaust, thereby further reducing the flow rate and further reducing the impact force of gas reaching the exhaust outlet, thereby reducing exhaust pulsation.

[0016] Preferably, the V-shaped groove arranged on the rear cover can be used for collecting lubricating oil, and the baffle is located in front of the V-shaped groove, so that the lubricating oil carried in the airflow is guided into the V-shaped groove through the oil hole after being blocked by the baffle.

[0017] Preferably, the two sealing sheets facilitate the integral connection of the inner sealing gasket and the outer sealing gasket, and are beneficial to sealing enhancement.

[0018] Preferably, the buffer layer on the elastic valve sheet can reduce exhaust noise. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1is a schematic view of the exhaust structure of a scroll compressor of the prior art;

[0020] Figure 2 is a schematic view of a compressor reducing exhaust pulsation according to an embodiment of the present application;

[0021] Figure 3 is Figure 2 is a schematic view from another angle;

[0022] Figure 4 is Figure 2 is a plan view of the back of the static plate in the static plate.

[0023] In the figure: 1 - static plate, 1.1 - exhaust inlet, 1.2 - first groove, 1.3 - second groove, 1.4 - gas passage, 1.5 - barrier wall, 1.6 - elastic valve plate, 2 - back cover, 2.1 - exhaust outlet, 2.2 - annular boss, 2.3 - V-shaped groove, 3 - sealing gasket, 3.1 - outer sealing gasket, 3.2 - inner sealing gasket, 3.3 - sealing plate, 3.4 - oil hole. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] As Figures 2 to 4 shown, the compressor reducing exhaust pulsation according to an embodiment of the present application comprises a dynamic plate (not shown in the figure) and a static plate 1 engaged together, the back of the static plate 1 is sealingly installed with a back cover 2, a sealing gasket 3 is arranged between the static plate 1 and the back cover 2, an exhaust inlet 1.1 is arranged on the back of the static plate 1, an exhaust outlet 2.1 is arranged on the back cover 2, an annular boss 2.2 is arranged in the back cover 2, the annular boss 2.2 divides the internal space of the back cover 2 into an inner cavity and an outer cavity, the sealing gasket 3 comprises an outer sealing gasket 3.1 and an inner sealing gasket 3.2, the outer sealing gasket 3.1 is sealingly assembled between the edge of the back of the static plate 1 and the edge of the outer cavity of the back cover 2, the shape and size of the inner sealing gasket 3.2 are adapted to the annular boss 2.2, and the inner sealing gasket 3.2 is sealingly assembled between the back of the static plate 1 and the annular boss 2.2; the back of the static plate 1 is provided with a first groove 1.2 and a second groove 1.3, the first groove 1.2 and the exhaust inlet 1.1 are both located on the inner side of the inner sealing gasket 3.2, the second groove 1.2 is located on the outer side of the inner sealing gasket 3.2, a gas passage 1.4 is arranged between one end of the second groove 1.3 and the first groove 1.2, and the other end of the second groove 1.3 is in communication with the exhaust outlet 2.1.

[0026] The first groove 1.2 adopts a linear structure, and the second groove 1.3 adopts a C-shaped structure. A middle position in the second groove 1.3 is provided with a baffle 1.5 for blocking the airflow, the baffle 1.5 is fixed on one side of the second groove 1.3 and has a gap between the other side of the second groove 1.3. The baffle 1.5 is two, and the two baffles 1.5 are respectively fixed on two sides of the second groove 1.3.

[0027] The rear cover 2 is provided with a V-shaped groove 2.3 near the inner side of the outer sealing gasket 3.1, and the inner edge of the outer sealing gasket 3.1 is provided with an oil hole 3.4 corresponding to the V-shaped groove 2.3. In the direction of the exhaust airflow, the baffle 1.5 is located at the rear of the V-shaped groove 2.3.

[0028] The outer sealing gasket 3.1 and the inner sealing gasket 3.2 are integrally connected with a sealing sheet 3.3, and the sealing sheet 3.3 is two, and the two sealing sheets 3.3 are respectively located at the two end positions of the second groove 1.3.

[0029] The exhaust inlet 1.1 is provided with an elastic valve sheet 1.6, and the side of the elastic valve sheet 1.6 which is attached to the back of the static disc 1 is provided with a buffer layer. The elastic valve sheet 1.6 adopts an m-shaped structure, and the m-shaped valve sheet includes a main body and three elastic sheets fixed on the main body, and the elastic sheet located at the middle position is pressed on the exhaust inlet.

[0030] The compressor of the utility model in the exhaust, under the pressure of the airflow, the elastic valve sheet opens, the airflow is discharged from the exhaust inlet to the space between the annular boss of the rear cover and the static disc, then enters the first groove, then enters the second groove through the gas passage, and finally is discharged from the exhaust outlet. The utility model prolongs the exhaust path through the first groove and the second groove, the whole drainage path is long distance, and the gas is in the process of first expansion, then throttling and finally expansion. The first groove is a large volume cavity, the airflow is in the expansion process from the exhaust inlet to the first groove; the gas passage is small in volume, and the throttling process is from the first groove to the gas passage; the second groove is a large volume cavity, and the expansion process is from the gas passage to the second groove, the airflow hits two baffles in the second groove, further reduces the flow rate, and reduces the impact force of the gas reaching the exhaust outlet, thereby reducing the exhaust pulsation.

[0031] The above embodiments and descriptions described in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A compressor for reducing exhaust pulsation, comprising a moving disc and a stationary disc meshing together, a rear cover being sealed to the back of the stationary disc, a sealing gasket being provided between the stationary disc and the rear cover, an exhaust inlet being provided on the back of the stationary disc, and an exhaust outlet being provided on the rear cover, characterized in that: The rear cover is internally provided with an annular boss, which divides the internal space of the rear cover into an inner cavity and an outer cavity, the sealing gasket comprises an outer sealing gasket and an inner sealing gasket, the outer sealing gasket is sealingly assembled between the edge of the back surface of the static disc and the edge of the outer cavity of the rear cover, the shape and size of the inner sealing gasket are adapted to the annular boss, and the inner sealing gasket is sealingly assembled between the back surface of the static disc and the annular boss; the back surface of the static disc is provided with a first groove and a second groove, the first groove and the gas inlet are located on the inner side of the inner sealing gasket, the second groove is located on the outer side of the inner sealing gasket, a gas passage is arranged between one end of the second groove and the first groove, and the other end of the second groove is in communication with the gas outlet.

2. The reduced pulsation compressor of claim 1, wherein: The first groove adopts a linear structure.

3. The reduced pulsation compressor of claim 1, wherein: The second groove adopts a C-shaped structure.

4. The reduced pulsation compressor of claim 1, wherein: A middle position in the second groove is provided with a baffle for blocking the airflow, the baffle is fixed on one side of the second groove, and has a gap between the other side of the second groove.

5. The reduced pulsation compressor of claim 4, wherein: The baffle has two, and the two baffles are respectively fixed on two sides of the second groove.

6. The reduced pulsation compressor of claim 4, wherein: A V-shaped groove is arranged on the rear cover near the inner side of the outer sealing gasket, and an oil hole is arranged on the inner edge of the outer sealing gasket corresponding to the position of the V-shaped groove.

7. The reduced pulsation compressor of claim 6, wherein: In the direction of the exhaust airflow, the baffle is located at the rear part of the V-shaped groove.

8. The reduced pulsation compressor of claim 1, wherein: The outer sealing gasket and the inner sealing gasket are integrally connected with a sealing sheet, the sealing sheet has two, and the two sealing sheets are respectively located at the two end positions of the second groove.

9. The reduced pulsation compressor of claim 1, wherein: The gas inlet is provided with an elastic valve sheet, and the side of the elastic valve sheet abutting against the back surface of the static disc is provided with a buffer layer.

10. The reduced pulsation compressor of claim 9, wherein: The elastic valve sheet adopts an m-shaped structure, the m-shaped valve sheet comprises a main body and three elastic sheets fixed on the main body, and the elastic sheet located at the middle position is pressed on the gas inlet.

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