Compressor with exhaust pressure stabilizing device

Abstract

The compressor with the exhaust pressure stabilizing device comprises an exhaust expansion cavity, the exhaust pressure stabilizing device is installed in the exhaust expansion cavity, a base is fixedly arranged at an opening of the exhaust expansion cavity, and a first channel is formed in the base in the axis direction; a plurality of first channels are formed in the outer wall of the protruding piece, the protruding piece is arranged in the exhaust expansion cavity, a containing cavity is formed in the protruding piece, the containing cavity is communicated with the first channels, and a plurality of second channels evenly distributed in the circumferential direction are formed in the outer wall of the protruding piece. High-frequency pressure pulsation generated by periodic exhaust of the compressor is absorbed and then is shunted and flows out through the second channel, so that flowing pulsation of airflow is reduced, airflow circulation is more stable, the air flow speed and pressure fluctuation are effectively reduced, pressure impact on the compressor and downstream equipment is greatly reduced, noise and vibration are reduced, and the service life of the compressor is prolonged. Meanwhile, the exhaust pressure stabilizing device is small in size and convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of compressor equipment technology, and in particular to a compressor with an exhaust pressure stabilizing device. Background Technology

[0002] A rotary swashplate automotive air conditioning compressor mainly consists of a swashplate, two cylinders mounted on and connected to the swashplate, a piston, and front and rear covers at the outer ends of the cylinders. The air conditioning compressor is installed in the air conditioning system. The noise of the entire vehicle's air conditioning system is primarily generated by the airflow pulsation during compressor operation. The periodic operation of the cylinders causes high-frequency pulsations in the exhaust pressure. These high-frequency pulsations subject the compressor and downstream equipment (such as the condenser and pipes) to periodic pressure, resulting in vibration and noise. High-speed airflow impacting the pipes also generates high-frequency noise. Therefore, it is necessary to control the compressor's exhaust pulsation as much as possible to reduce noise during operation and improve passenger comfort.

[0003] However, it is quite difficult to effectively control the exhaust pulsation of the compressor while ensuring a certain cooling capacity. First of all, the compressor continuously discharges high-pressure refrigerant gas during operation. If the exhaust passage of the compressor is not optimized and improved, it will cause large exhaust pulsation and high-frequency noise. Traditional pressure stabilizing devices (such as expansion chambers and mufflers) are too large to be compatible with vehicles with limited installation. Therefore, there is an urgent need for an exhaust pressure stabilizing device that can be installed in the air conditioning compressor to effectively control the exhaust pulsation of the compressor and has high compatibility. Utility Model Content

[0004] The purpose of this invention is to provide a compressor with an exhaust pressure stabilizing device to solve the problems in the prior art, which can effectively control the exhaust pulsation of the compressor and has high adaptability.

[0005] This utility model provides a compressor with an exhaust pressure stabilizing device, including an exhaust expansion chamber, wherein the exhaust expansion chamber is equipped with an exhaust pressure stabilizing device, the exhaust pressure stabilizing device comprising:

[0006] A base, which is fixed at the opening of the exhaust expansion chamber, and the base has a first channel along the axial direction;

[0007] A protrusion is provided on one side of the base. The protrusion is disposed in the exhaust expansion chamber. The protrusion has a receiving cavity, which is connected to the first channel. Several second channels are evenly distributed circumferentially on the outer wall of the protrusion.

[0008] In a compressor with an exhaust pressure stabilizing device as described above, preferably, the inner diameter of the accommodating cavity is larger than the inner diameter of the first channel.

[0009] In a compressor with an exhaust pressure stabilizing device as described above, preferably, the sum of the cross-sectional areas of the plurality of second channels is less than the cross-sectional area of ​​the first channel.

[0010] In a compressor with an exhaust pressure stabilizing device as described above, preferably, the outer diameter of the protrusion is smaller than the outer diameter of the base.

[0011] In a compressor with an exhaust pressure stabilizing device as described above, preferably, there is a predetermined distance between the outer wall of the protrusion and the inner wall of the exhaust expansion chamber.

[0012] In a compressor with an exhaust pressure stabilizing device as described above, preferably, one side of the exhaust expansion chamber is connected to an exhaust passage, and the cross-sectional position of the second passage corresponds to the position of the exhaust passage.

[0013] Compared with existing technologies, this invention installs an exhaust pressure stabilizing device in the exhaust expansion chamber of the rear cover. The high-temperature, high-pressure refrigerant gas, compressed by the piston, enters the receiving cavity through the first channel for expansion and buffering, absorbing the high-frequency pressure pulsations generated by the periodic exhaust of the compressor. It then flows out through the second channel, effectively reducing gas velocity and pressure fluctuations, minimizing airflow pulsation, and ensuring smoother gas flow. This significantly reduces pressure shocks to the compressor and downstream equipment, thereby reducing noise and vibration and extending the compressor's service life. Furthermore, this exhaust pressure stabilizing device is small in size, easy to assemble, and does not require external installation space on the compressor. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the rotary swashplate compressor and exhaust pressure stabilizing device after installation, as provided in an embodiment of this utility model.

[0015] Figure 2 This is a perspective view of the rotary swashplate compressor provided in an embodiment of the present invention;

[0016] Figure 3 This is a perspective view of the exhaust pressure stabilizing device provided in an embodiment of this utility model;

[0017] Figure 4 This is a cross-sectional view of the exhaust pressure stabilizing device provided in an embodiment of this utility model;

[0018] Figure 5 This is a perspective view of the back cover provided in an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10 - Exhaust pressure stabilizing device, 100 - Base, 101 - First channel, 102 - Protrusion, 103 - Accommodating cavity, 104 - Second channel;

[0021] 20 - Rear cover, 200 - Rear cover high pressure chamber, 201 - Rear cover low pressure chamber, 202 - Exhaust expansion chamber, 203 - Exhaust passage;

[0022] 30 - Front cover, 300 - Front cover high pressure chamber, 301 - Front cover low pressure chamber;

[0023] 40 - front cylinder block, 50 - rear cylinder block, 60 - intake port, 70 - exhaust port, 80 - crankshaft cavity. Detailed Implementation

[0024] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] See Figure 1 As shown in Figure 5, this utility model discloses a compressor with an exhaust pressure stabilizing device. Taking a rotary swashplate compressor as an example, the rotary swashplate compressor includes a front cylinder block 40, a rear cylinder block 50, and a crankshaft cavity 80 connected to each other. A front cover 30 is used to seal the end of the front cylinder block 40, and a rear cover 20 is used to seal the end of the rear cylinder block 50. An intake port 60 is provided on the rear cylinder block 50. The front cover 30 has a front cover high-pressure chamber 300 and a front cover low-pressure chamber 301. The rear cover 20 has a rear cover low-pressure chamber 201, a rear cover high-pressure chamber 200, an exhaust expansion chamber 202, and an exhaust passage 203. The exhaust expansion chamber 202 is connected to the rear cover high pressure chamber 200 and the exhaust channel 203 respectively. The exhaust channel 203 extends to the outer wall of the rear cover 20 to form an exhaust port 70. The front cover high pressure chamber 300 is connected to the rear cover high pressure chamber 200. The refrigerant gas in the front cover high pressure chamber 300 and the refrigerant gas in the rear cover high pressure chamber 200 merge in the exhaust expansion chamber 202 and are discharged through the exhaust channel 203. The two gases will generate a large exhaust pulsation and high frequency noise in the exhaust expansion chamber 202. In order to solve this problem, this application installs an exhaust pressure stabilizing device 10 in the exhaust expansion chamber 202.

[0026] The exhaust pressure stabilizing device 10 includes a base 100 and a protrusion 102, wherein:

[0027] A base 100 is fixed at the opening of the exhaust expansion chamber 202. The base 100 has a first channel 101 along its axial direction. A protrusion 102 protrudes from one side of the base 100 and is disposed within the exhaust expansion chamber 202. The protrusion 102 has a receiving cavity 103, which communicates with the first channel 101. The receiving cavity 103 and the first channel 101 are coaxial, and refrigerant gas enters the receiving cavity through the first channel 101. (See also...) Figure 1 and 3As shown in Figure 5, since the refrigerant gas in the front cover high-pressure chamber 300 and the rear cover high-pressure chamber 200 will simultaneously converge in the exhaust expansion chamber 202, in this application, the base 100 is fixed at the opening of the exhaust expansion chamber 202, and its connection method is not limited here. The protrusion 102 is set in the exhaust expansion chamber 202, which increases the structural complexity of the cavity. When the sound wave propagates in the cavity, it will be reflected and scattered when it encounters the protrusion 102. This reflection and scattering can disperse the energy of the sound wave, reduce the direct propagation of the sound wave, and thus reduce the noise transmitted from the exhaust port 70.

[0028] The outer wall of the protrusion 102 has several circumferentially distributed second channels 104. These second channels 104 form a pulsation attenuation flow path, reducing gas velocity and pressure fluctuations. In the embodiments provided in this application, the several second channels 104 are evenly distributed circumferentially, enabling uniform gas distribution into each second channel 104, avoiding local pressure concentration, effectively improving the uniformity of airflow distribution, reducing local high-pressure areas, and lowering noise and vibration caused by uneven airflow. Gas enters the receiving cavity 103 through the first channel 101 and then flows out dispersedly through the multiple second channels 104, which buffers and stabilizes the airflow, making it flow more smoothly, thereby reducing pipe vibration and noise, and avoiding additional impact loads on air conditioning system components.

[0029] See Figure 4 As shown, the inner diameter of the cavity 103 is larger than the inner diameter of the first channel 101. When the refrigerant gas enters the cavity 103 from the first channel 101, the cavity 103 forms an expansion buffer for the gas due to its larger inner diameter, which can absorb the high-frequency pressure pulsation generated by the periodic exhaust of the compressor.

[0030] In one possible implementation, see [link to implementation details]. Figure 3 As shown in Figure 4, the sum of the cross-sectional areas of the multiple second channels 104 is smaller than the cross-sectional area of ​​the first channel 101. When gas enters the multiple second channels 104 with small cross-sectional areas from the first channel 101, the total cross-sectional area of ​​the multiple second channels 104 decreases, which can play a damping role. The gas velocity will be significantly reduced, thereby reducing turbulence and impact noise caused by high-speed airflow, as well as reducing the impact of airflow on the inner wall of the exhaust pressure stabilizing device 10 and downstream pipeline, and reducing vibration and wear.

[0031] In another implementation, see Figure 3 As shown in Figure 4, the outer diameter of the protrusion 102 is smaller than the outer diameter of the base 100. There is a certain distance between the extension line of the second channel 104 and the outer wall surface of the base 100, providing space for gas to flow out.

[0032] In another embodiment, see Figure 1As shown, there is a preset distance between the outer wall of the protrusion 102 and the inner wall of the exhaust expansion cavity 202. The outer wall of the protrusion 102 includes a circumferential outer wall and a bottom wall on the side opposite to the base 100. Setting the preset distance can make full use of the space of the exhaust expansion cavity 202 to achieve buffering and pressure stabilization, making the airflow in the exhaust expansion cavity 202 more uniform and stable. In addition, the space formed by the preset distance can serve as a resonance cavity. When sound waves propagate in the exhaust expansion cavity 202, reflection and scattering will occur in this space, which can further reduce noise.

[0033] Further, see Figure 1 As shown, the cross-sectional position of the second channel 104 corresponds to the position of the exhaust channel 203 of the compressor rear cover 20. The exhaust channel 203 is connected to the exhaust expansion chamber 202, and the second channel 104 corresponds to the exhaust channel 203. The airflow can pass smoothly through the exhaust channel 203, reducing the impact and turbulence of the airflow, thereby effectively reducing noise and vibration.

[0034] In this application, as long as the rear cover 20 of the compressor has an exhaust expansion chamber 202 and the exhaust expansion chamber 202 is connected to the exhaust channel 203, the exhaust pressure stabilizing device 10 in this application can be installed in the exhaust expansion chamber 202 to absorb the high-frequency pressure pulsation generated by the periodic exhaust of the compressor and reduce noise. The refrigerant gas in the high pressure chamber 300 of the front cover and the refrigerant gas discharged from the high pressure chamber 200 of the rear cover pass through the first channel 101 at the same time, and further merge and stabilize in the accommodating cavity 103, so that the stabilized refrigerant gas is gradually discharged through several second channels 104, reducing the gas flow rate and pressure fluctuation, thereby reducing noise and vibration.

[0035] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A compressor with an exhaust pressure stabilizing device, comprising an exhaust expansion chamber, characterized in that, An exhaust pressure stabilizing device is installed inside the exhaust expansion chamber. The exhaust pressure stabilizing device includes: A base, which is fixed at the opening of the exhaust expansion chamber, and the base has a first channel along the axial direction; A protrusion is provided on one side of the base. The protrusion is disposed in the exhaust expansion chamber. The protrusion has a receiving cavity, which is connected to the first channel. Several second channels are evenly distributed circumferentially on the outer wall of the protrusion.

2. The compressor with an exhaust pressure stabilizing device according to claim 1, characterized in that: The inner diameter of the cavity is larger than the inner diameter of the first channel.

3. The compressor with an exhaust pressure stabilizing device according to claim 1, characterized in that, The sum of the cross-sectional areas of several second channels is less than the cross-sectional area of ​​the first channel.

4. The compressor with an exhaust pressure stabilizing device according to claim 1, characterized in that, The outer diameter of the protrusion is smaller than the outer diameter of the base.

5. The compressor with an exhaust pressure stabilizing device according to claim 1, characterized in that, There is a predetermined distance between the outer wall of the protrusion and the inner wall of the exhaust expansion chamber.

6. The compressor with an exhaust pressure stabilizing device according to claim 1, characterized in that, One side of the exhaust expansion chamber is connected to the exhaust channel, and the cross-sectional position of the second channel corresponds to the position of the exhaust channel.

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