Bridge muffler air passage for vehicle air conditioner compressor

Abstract

The application provides a bridge type noise elimination air guide path of a vehicle air conditioner compressor, which is arranged in the air conditioner compressor, the air conditioner compressor comprises a shell, a rear end plate arranged in the shell, a cylinder body and a front end plate, a first noise elimination cavity is formed by the shell, the front end plate, the rear end plate and the cylinder body, a valve assembly is arranged on the cylinder body, and the bridge type noise elimination air guide path further comprises a noise elimination air guide pipe, the noise elimination air guide pipe is arranged at the position of the first noise elimination cavity and is fixedly connected with the cylinder body, a cavity is arranged in the noise elimination air guide pipe and is communicated with the exhaust hole of the cylinder body and the air inlet hole of the rear end plate, high-pressure gas in the compressor is directly discharged from the exhaust hole of the cylinder body, directly enters the built-in noise elimination air guide pipe, directly enters the air inlet hole of the rear end plate through the cavity of the noise elimination air guide pipe, and the bridge type noise elimination air guide path is formed, the bridge type noise elimination air guide path arranged in the first noise elimination cavity is designed, the whole high-pressure cavity is simplified into a pipeline connection type path, a new gas flow path is formed, the pressure gradient is ensured to be similar, and the pressure loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner compressor noise reduction, in particular to a bridge type noise reduction gas guide path for vehicle air conditioner compressor. BACKGROUND

[0002] Currently, the gas of rotary vane compressor is compressed into high-temperature and high-pressure gas in the cylinder compression chamber, and then is discharged at high speed through the cylinder exhaust hole, enters the first-stage noise reduction cavity after hitting the valve assembly, and advances into the gas inlet on the rear end plate under the action of pressure difference. Due to the flow mutation of the gas in the cylinder exhaust hole (small diameter) and the first-stage noise reduction cavity, a large pressure gradient change is formed, and the structure of the valve assembly and the large open space of the first-stage noise reduction cavity are affected, which causes the refrigerating capacity (hereinafter referred to as performance) of the compressor to decrease and the aerodynamic noise to increase. Specifically, the first-stage noise reduction cavity has the effect of reducing noise in some frequency bands, but due to its simple structure, it is mainly composed of existing parts assembled to form a new area, and the noise reduction frequency range and size are limited. The gas flows at high speed from the cylinder exhaust hole to the first-stage noise reduction cavity, and the first-stage noise reduction cavity refers to the area formed by the shell, cylinder, rear end plate and front end plate. The gas flow will be dispersed to various positions in the first-stage noise reduction cavity, causing pressure loss. At the same time, the gas in the first-stage noise reduction cavity will also be affected by the structure of the valve assembly (valve piece, valve plate, gasket and screw assembly), which will change the flow state (the flow resistance and flow state are changed under the influence of pressure difference before and after the obstruction). When the gas flows at high speed, under the combined action of the first-stage noise reduction cavity and the obstruction of the valve assembly, more vortices will be formed in the first-stage noise reduction cavity and near the valve assembly (the boundary layer separation occurs in the valve assembly towards the inlet hole direction of the rear end plate), and the gas will flow in the form of turbulent flow, and the long space of the first-stage noise reduction cavity provides the condition for breaking large eddies into small eddies. According to the vibration principle, the aerodynamic noise generated by the gas flow is caused by many factors such as turbulent flow (vortex is a form of turbulent flow), pressure difference (pressure fluctuation) and vortex breaking, and the turbulent flow flow is chaotic and produces shear flow, which dissipates a lot of momentum, causing flow loss, i.e. the kinetic energy of the fluid is converted into heat energy, thereby reducing the flow and reducing the performance of the compressor. At the same time, the high-speed gas ejected from the cylinder exhaust hole hits the wall surface of the shell and the cylinder, causing vibration and causing structural vibration noise, and the shell also needs a larger wall thickness to withstand the impact of high-pressure gas, causing the weight of the parts to increase (secondary factor). In summary, the compressor is prone to generate a large noise under the combined action of aerodynamic noise and structural vibration noise, reducing comfort. Due to the influence of turbulent flow dissipation in the first-stage noise reduction cavity, the performance will also be greatly reduced, ultimately affecting the overall competitiveness of the product. SUMMARY

[0003] The purpose of the present application is to overcome the deficiencies of the prior art, and to design a bridge type silencing exhaust passage installed in a primary silencing cavity, so that the entire high pressure cavity is simplified into a pipeline connected passage, a new gas flow path is formed, and the pressure gradient is ensured to be similar, and the pressure loss is reduced.

[0004] The technical scheme of the present application is as follows:

[0005] A bridge type silencing guide passage for an air conditioner compressor is arranged in the air conditioner compressor, the air conditioner compressor comprising a shell, a rear end plate arranged in the shell, a cylinder body and a front end plate, a primary silencing cavity being formed between the shell, the front end plate, the rear end plate and the cylinder body, a valve assembly being arranged on the cylinder body, and further comprising a silencing guide pipe, the silencing guide pipe being arranged at the position of the primary silencing cavity and being fixedly connected with the cylinder body, a cavity being arranged in the silencing guide pipe, the cavity being in communication with the exhaust hole of the cylinder body and the air inlet hole of the rear end plate, high pressure gas in the compressor being directly discharged from the exhaust hole of the cylinder body into the built-in silencing guide pipe, and then being directly introduced into the air inlet hole of the rear end plate through the cavity of the silencing guide pipe, so as to form the bridge type silencing guide passage.

[0006] Preferably, the silencing guide pipe is a cylindrical pipe with one open end and one closed end, the open end being arranged at the rear end plate so that the air inlet hole of the rear end plate is in communication with the cavity of the silencing guide pipe, and lugs are arranged on the outer surface of the silencing guide pipe, the silencing guide pipe being fixedly installed on the cylinder body through the lugs, and a clearance slot is further arranged on the silencing guide pipe and arranged at the valve assembly, so as to ensure that the valve assembly can work normally.

[0007] Preferably, the lugs are three in number and are integrally formed with the silencing guide pipe, and the lugs close to the installation position of the valve assembly are two in number, and a through hole is arranged on each lug.

[0008] Preferably, the clearance slots are arranged at one end of the installation position of the valve assembly and the cylinder body, and two clearance slots are arranged.

[0009] Preferably, threaded holes are arranged on the cylinder body and correspond to the positions of the through holes of the lugs, and the silencing guide pipe and the cylinder body are connected and fixed through screws.

[0010] Preferably, the cylindrical pipe of the silencing guide pipe can adopt a linear type or a curved type structure.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] 1. The silencing guide pipe is arranged in the primary silencing cavity of the compressor, so that the entire high pressure cavity is simplified into a pipeline connected passage, a new gas flow path is formed, the performance reduction caused by fluid resistance is reduced, the structure is simple, the processing is convenient, and the weight is light.

[0013] 2. The bridge type silencing exhaust passage can eliminate the large vortex formed by the gas in the high pressure cavity, simplify the gas flow from complex three-dimensional flow to simple two-dimensional pipeline flow (the part behind the valve plate can be simplified as two-dimensional flow), make the gas flow smoothly in the pipeline (only small scale turbulent vortex exists in the bridge type silencing exhaust passage when the gas flows at high speed), and reduce the aerodynamic noise caused by fluid turbulent flow;

[0014] 3. The structural vibration noise caused by the impact of high pressure gas on the shell and the cylinder wall is eliminated, so that the comfort and performance of the compressor are improved, and the comprehensive competitiveness of the compressor is improved;

[0015] 4. A new gas flow path is formed, the bridge type silencing guide gas passage makes the high pressure gas directly enter the built-in silencing guide pipe after being discharged from the compressor exhaust hole, enters the gas inlet hole of the rear end plate after passing through the channel of the built-in silencing guide pipe, and saves a series of adverse effects caused by the gas entering the primary silencing cavity after being discharged from the cylinder exhaust hole;

[0016] 5. The application is suitable for rotary vane type air conditioning compressors of various displacements. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the shaft side view of the related parts of the primary silencing cavity of the existing rotary vane type compressor;

[0018] Figure 2 is the shaft side view of the bridge type silencing guide gas passage,

[0019] Figure 3 is the front view of the bridge type silencing guide gas passage,

[0020] Figure 4 is the top view of the bridge type silencing guide gas passage,

[0021] Figure 5 is Figure 3 A-A sectional view in figure,

[0022] Figure 6 is Figure 4 B-B sectional view in figure,

[0023] Figure 7 is the exploded view of the bridge type silencing guide gas passage.

[0024] In the drawings: 1 is the rear end plate, 2 is the cylinder, 3 is the silencing guide pipe, 4 is the primary silencing cavity,

[0025] 5 is the front end plate, 6 is the ear, 7 is the screw, 8 is the valve assembly, 9 is the compression chamber, 10 is the cylinder exhaust hole, 11 is the rear end plate gas inlet hole, 12 is the silencing guide pipe slot,

[0026] 31 is the cavity DETAILED DESCRIPTION

[0027] The embodiments of the present application will be further described in detail with reference to the accompanying drawings.

[0028] As Figures 1-7 The vehicle air conditioner compressor bridge type silencing guide path is arranged in the air conditioner compressor, which comprises a shell, a rear end plate 1 arranged in the shell, a cylinder body 2 and a front end plate 5, a first stage silencing cavity 4 is formed between the shell, the front end plate 5, the rear end plate 1 and the cylinder body 2, a valve assembly 8 is arranged on the cylinder body 2, and a silencing guide pipe 3 is arranged at the position of the first stage silencing cavity 4 and fixedly connected with the cylinder body 2 through a screw 7, the silencing guide pipe 3 is internally provided with a cavity 31, which is communicated with a cylinder exhaust hole 10 and a rear end plate air inlet hole 11, high pressure gas in the compressor is directly discharged from the cylinder exhaust hole 10 and then directly enters the rear end plate air inlet hole 11 through the cavity 31 of the silencing guide pipe 3, thereby forming the bridge type silencing guide path.

[0029] In order to ensure that the outlet of the built-in silencing guide pipe 3 is completely aligned with the rear end plate air inlet hole 11 on the rear end plate 1 and reduce the gas leakage, in the embodiment, the silencing guide pipe 3 is a cylindrical pipe with one open end and one closed end, the open end is arranged at the rear end plate 1, the rear end plate air inlet hole 11 is communicated with the cavity 31 of the silencing guide pipe, the shape of the silencing guide pipe 3 can be designed as a straight line type or a curved type according to the position of the rear end plate air inlet hole 11 on the rear end plate 1, the silencing guide pipe 3 is provided with three lugs 6, which are integrally formed with the silencing guide pipe, the lugs close to the valve assembly mounting position are two, a through hole is formed in each lug, the silencing guide pipe 3 is fixedly mounted on the cylinder body 2 through the lugs 6, the valve assembly 8 is mounted on the cylinder body 2, the silencing guide pipe 3 is designed with a silencing guide pipe accommodation groove 12 for accommodating the valve assembly 8, which is arranged at one end of the valve assembly 8 and the cylinder body 2 mounting position, and two are arranged to ensure the normal work of the valve assembly 8.

[0030] The cylinder body 2 is designed with three threaded holes in the first stage silencing cavity 4, which correspond to the through hole positions of the lugs 6, and the silencing guide pipe 3 is connected and fixed with the cylinder body 2 through the screw 7.

[0031] The silencing guide pipe is arranged in the first stage silencing cavity of the compressor, the high pressure gas in the compressor passes through the cylinder exhaust hole 10, the silencing guide pipe 3 and the rear end plate air inlet hole 11 to form a new bridge type silencing guide path, thereby forming a new gas flow path, and simplifying the existing complex three-dimensional flow into a simple two-dimensional pipe flow.

[0032] When the compressor is working, the compression chamber 9 compresses the low-temperature and low-pressure gas into high-temperature and high-pressure gas, which is discharged through the cylinder exhaust hole 10, and then enters the muffler guide pipe 3, which is connected with the rear end plate gas inlet hole 11. Under the action of pressure difference and the guide flow of the muffler guide pipe 3, the gas enters the rear end plate gas inlet hole 11. Since the muffler guide pipe 3 is directly connected with the cylinder 2 and the rear end plate 1, a new bridge type muffler guide pipe is formed, so that the flow state of the gas in the muffler guide pipe 3 is stable and smooth, avoiding the turbulent flow of the gas in the primary muffler cavity 4 and the impact on the cylinder 2 and the shell wall, thereby effectively reducing the aerodynamic noise of the gas flow and the structural vibration noise, and finally achieving the dual purpose of improving the comfort and performance of the compressor.

[0033] The technical scheme is verified by comparison test on a certain 120 displacement compressor. The performance of the compressor with the bridge type muffler guide pipe structure at each speed section is much higher than that of the original compressor. The COP increases by 20%. The total noise value and each order at the commonly used speed section range is reduced to different degrees. The exhaust temperature is also lower than that of the original state. The comprehensive purpose of improving performance and reducing noise is achieved.

[0034] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A bridge-type muffler air guide passage for a vehicle air-conditioning compressor is disposed within the air-conditioning compressor. The air-conditioning compressor comprises a housing, a rear end plate disposed within the housing, a cylinder body, and a front end plate. The housing, front end plate, rear end plate, and cylinder body enclose a primary muffler chamber. A valve assembly is mounted on the cylinder body. The invention is characterized by: The muffling gas guide pipe is provided at the position of the first-stage muffling cavity, fixedly connected with the cylinder body, and internally provided with a cavity, which is communicated with the exhaust hole of the cylinder body and the air inlet hole of the rear end plate. The muffling gas guide pipe is a cylindrical pipe with one open end and one closed end, and the open end is arranged at the rear end plate to make the air inlet hole of the rear end plate communicated with the cavity of the muffling gas guide pipe. The muffling gas guide pipe is provided with lugs on the outer surface, and is fixedly installed on the cylinder body through the lugs.

2. The bridge silencer air guide passage for an automotive air conditioning compressor as set forth in claim 1, characterized by: The lugs are provided with three holes, and are integrally formed with the muffling gas guide pipe. The lugs near the valve assembly installation position are provided with two holes. The cylinder body is provided with threaded holes corresponding to the holes of the lugs, and the muffling gas guide pipe is connected and fixed with the cylinder body through screws.

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