Noise reduction and non-return structure for special-shaped air passage of rotary vane compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a noise reduction non-return structure for a special-shaped air passage of a rotary vane compressor, which comprises a shell and a front end cover arranged on one side of the shell, an air inlet and an air outlet are arranged on the outer surface of the shell, and the air inlet is arranged close to one end of the front end cover; an end cover cavity is formed in the side, facing the shell, of the front end cover, an air guide cavity, a working cavity and an exhaust cavity are formed in the shell, the air guide cavity is formed in the air inlet, the end cover cavity communicates with the air guide cavity and the working cavity, and the exhaust cavity is formed in the air outlet and communicates with the end, away from the end cover cavity, of the working cavity; and the air guide cavity is L-shaped, and a check valve is clamped in the air guide cavity. The air passage structure is optimized, airflow noise during operation of the compressor is effectively reduced, comfort of a driver and passengers is improved, the check valve is arranged in the air passage structure, the reverse rotation trend during shutdown of the compressor is controlled, abrasion and noise caused by reverse rotation are eliminated, and therefore the service life of the compressor is prolonged, and the working performance of the compressor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a special-shaped airway silencer and anti-return structure of a rotary vane compressor. Background Art

[0002] The rotary vane automotive air-conditioning compressor is the core component of the automotive air-conditioning system. Its structure is generally composed of a cylinder, a rotor, blades, and front and rear end covers. The rotation of the rotor completes the process of suction, compression, and exhaust. With its high speed, high efficiency, small size, and good adaptability to working fluids, it plays an important role in the automotive air-conditioning system.

[0003] In the related technology, in order to improve the suction efficiency and reduce the energy consumption of the compressor, the special-shaped air duct rotary vane compressor has gradually developed and been applied. Its air inlet and air outlet are distributed on the compressor housing, and the air duct structure is a Z-shaped structure. As a result, when the gas enters the air duct structure, it needs to pass through the air inlet, the end cover cavity and the inside of the movement in sequence, resulting in a too long gas path, accompanied by obvious airflow noise during operation, and the reversal trend of the compressor when it stops is difficult to control, which not only affects the working performance and service life of the compressor, but also causes noise when the compressor stops, affecting the safety and comfort of the driver and passengers.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes the prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to provide a special-shaped air duct silencer and anti-reverse structure for a rotary vane compressor, so that the airflow noise is attenuated during operation, thereby ensuring the working performance and service life; and the reverse trend of the compressor when it is stopped is controlled, thereby eliminating the noise caused by the reverse rotation of the compressor.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a special-shaped air duct silencer and anti-return structure of a rotary vane compressor, comprising:

[0007] A housing and a front end cover provided on one side of an open end of the housing, wherein an air inlet and an air outlet are provided on an outer surface of the housing, wherein the air inlet is provided near one end of the front end cover, and the air outlet is provided away from one end of the front end cover;

[0008] An end cover cavity is provided on the side of the front end cover facing the shell, and an air guide cavity, a working cavity and an exhaust cavity are provided inside the shell. The air guide cavity is provided at the air inlet, and the end cover cavity is connected to the air guide cavity and the working cavity. The exhaust cavity is provided at the air outlet and is connected to the end of the working cavity away from the end cover cavity; the air guide cavity is provided in an L-shape, and a check valve is provided in the air guide cavity.

[0009] Furthermore, the air guide cavity includes a radial channel and an axial channel vertically connected, the radial channel is connected to the air inlet, the axial channel is connected to the end cover cavity, and the check valve is clamped in the radial channel at the connection between the radial channel and the axial channel.

[0010] Furthermore, the radial channel includes an air intake section, a throttling section and an expansion section, the air intake section is arranged at the air inlet, the throttling section is located between the air intake section and the expansion section, and the aperture of the throttling section is smaller than the air intake section setting, the expansion section is vertically connected to the axial channel, and the aperture of the expansion section is larger than the aperture settings of the air intake section and the throttling section.

[0011] Furthermore, the aperture of the expanded section is 20 mm to 30 mm.

[0012] Furthermore, the check valve includes a limit block, a valve core, a compression spring and a valve body. The limit block is clamped in the throttling section, and one end is connected to the end of the valve body. The valve core and the compression spring are both arranged between the limit block and the valve body, and the two ends of the compression spring are respectively arranged to abut the valve core and the inner end surface of the valve body.

[0013] Furthermore, a plurality of ventilation grooves are provided on the outer surface of the valve body. The ventilation grooves are provided through-through, and the distances between adjacent ventilation grooves are equal.

[0014] Furthermore, the limit block shrinks toward the outer axial surface of the valve body to form a step surface, the shrinking end of the limit block is arranged on the inner side of the valve body, and the end face of the valve core is abutted against the end face of the limit block under the action of the compression spring, and the end face of the valve body is abutted against the step surface.

[0015] Furthermore, one side of the valve core opposite to the inner bottom of the valve body is concave to form an abutment groove, one end of the compression spring is arranged in the abutment groove, and the end face is abutted against the bottom of the abutment groove.

[0016] Furthermore, the valve core is provided with a raised guide surface, which is arc-shaped and is raised toward the side where the air inlet is located.

[0017] Furthermore, blocking seats are provided on the air inlet and the air outlet, and the blocking seats are fixedly connected to the shell by bolts.

[0018] The beneficial effects of the present invention are as follows: the present invention effectively reduces the airflow noise during the operation of the compressor and improves the comfort of the driver and passengers by optimizing the air duct structure; and by arranging a check valve in the air duct structure, controls the reversal trend when the compressor is stopped, eliminates the wear and noise caused by reversal, thereby extending the service life of the compressor, and improving the working performance of the compressor as a whole, making its operation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the special-shaped air duct silencer and anti-return structure of the rotary vane compressor in the embodiment of the present utility model;

[0021] Figure 2 This is a side view of the special-shaped air duct silencer and anti-return structure of the rotary vane compressor in the embodiment of the utility model;

[0022] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0023] Figure 4 for Figure 2 Cross-sectional view at the middle BB;

[0024] Figure 5 This is a structural diagram of a check valve in an embodiment of the present utility model;

[0025] Figure 6 This is a left side view of the special-shaped air duct silencer and anti-return structure of the rotary vane compressor in the embodiment of the present utility model;

[0026] Figure 7 for Figure 6 Cross-sectional view at CC.

[0027] Figure markings: 1. Shell; 11. Air inlet; 12. Air outlet; 2. Front end cover; 21. End cover cavity; 3. Air guide cavity; 31. Radial channel; 311. Air inlet section; 312. Throttling section; 313. Expansion section; 32. Axial channel; 4. Working chamber; 5. Exhaust chamber; 6. Check valve; 61. Limit block; 611. Step surface; 62. Valve core; 621. Abutment groove; 622. Guide surface; 63. Compression spring; 64. Valve body; 641. Vent groove; 7. Blocking seat. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] like Figures 1 to 7 The special-shaped air passage silencer and anti-return structure of the rotary vane compressor shown includes:

[0032] A housing 1 and a front end cover 2 disposed on one side of an open end of the housing 1. An air inlet 11 and an air outlet 12 are disposed on the outer surface of the housing 1, with the air inlet 11 disposed near one end of the front end cover 2 and the air outlet 12 disposed away from the end of the front end cover 2.

[0033] An end cover cavity 21 is provided on the side of the front end cover 2 facing the shell 1, and an air guide cavity 3, a working cavity 4 and an exhaust cavity 5 are provided inside the shell 1. The air guide cavity 3 is provided at the air inlet 11, and the end cover cavity 21 connects the air guide cavity 3 and the working cavity 4. The exhaust cavity 5 is provided at the air outlet 12 and is connected to the end of the working cavity 4 away from the end cover cavity 21; the air guide cavity 3 is provided in an L-shape, and a check valve 6 is provided in the air guide cavity 3.

[0034] The utility model optimizes the airway structure, effectively reduces the airflow noise when the compressor is running, improves the comfort of the driver and passengers, and provides a check valve 6 in the airway structure to control the reversal trend when the compressor is stopped, eliminates the wear and noise caused by reversal, thereby extending the service life of the compressor, improving the working performance of the compressor as a whole, and making it run more smoothly.

[0035] On the basis of the above embodiment, the air guide cavity 3 includes a radial channel 31 and an axial channel 32 that are vertically connected. The radial channel 31 is connected to the air inlet 11, and the axial channel 32 is connected to the end cover cavity 21. The check valve 6 is stuck in the radial channel 31, located at the connection between the radial channel 31 and the axial channel 32; when the gas enters the radial channel 31 from the air inlet 11, the check valve 6 can be opened under the gas pressure and enter the axial channel 32. On the contrary, when the compressor is shut down, the high-pressure gas in the working chamber 4 cannot continue to flow to the end cover cavity 21 after passing through the check valve 6, thereby preventing reversal when the compressor is shut down and reducing noise and wear.

[0036] On the basis of the above embodiment, the radial channel 31 includes an air intake section 311, a throttling section 312 and an expansion section 313. The air intake section 311 is arranged at the air inlet 11, and the throttling section 312 is located between the air intake section 311 and the expansion section 313. The aperture of the throttling section 312 is smaller than that of the air intake section 311. The expansion section 313 is vertically connected to the axial channel 32, and the aperture of the expansion section 313 is larger than the apertures of the air intake section 311 and the throttling section 312. When the gas enters the radial channel 31, a throttling effect is formed at the throttling section 312 due to the smaller aperture. When passing through the expansion section 313, the activity space of the gas suddenly increases due to the increase in aperture, which reduces the speed of the gas flow, thereby attenuating the noise and improving the airflow noise of the special-shaped air duct rotary vane air-conditioning compressor.

[0037] On the basis of the above embodiment, the aperture of the diameter-enlarging section 313 is 20 mm to 30 mm, thereby avoiding overheating of the air intake caused by an excessively large diameter, which in turn affects the structural strength, and can ensure the sound-absorbing effect.

[0038] On the basis of the above embodiment, the check valve 6 includes a limit block 61, a valve core 62, a compression spring 63 and a valve body 64. The limit block 61 is clamped in the throttling section 312, and one end is connected to the end of the valve body 64. The valve core 62 and the compression spring 63 are both arranged between the limit block 61 and the valve body 64. The two ends of the compression spring 63 are respectively abutted against the inner end surfaces of the valve core 62 and the valve body 64; the limit block 61 is clamped in the throttling section 312, and one end is connected to the end of the valve body 64, which plays a role in fixing and limiting The function of the positions of other components of the check valve 6 is to ensure the stable operation of the check valve 6; the valve core 62 is the main working component of the check valve 6, which controls the one-way flow of gas. When gas enters the shell 1, the valve core 62 moves toward the compression spring 63 to open, allowing gas to enter. When no gas passes through, the valve core 62 moves in the opposite direction under the elastic force of the compression spring 63, closing the check valve 6. When the gas moves in the opposite direction, it prevents the gas from flowing back, preventing the compressor from reversing and reducing noise and wear.

[0039] On the basis of the above embodiment, a plurality of ventilation grooves 641 are provided on the outer surface of the valve body 64. The ventilation grooves 641 are provided through and the spacing between adjacent ventilation grooves 641 is equal. This helps to reduce the turbulence and eddy current of the air flow inside the valve body 64, thereby reducing the air flow noise, helping the gas to pass quickly while reducing the weight of the valve body 64, ensuring the smooth operation of the check valve 6, and reducing the wear caused by the impact of the air flow.

[0040] On the basis of the above embodiment, the limit block 61 shrinks toward the outer axial surface of the valve body 64 to form a step surface 611. The shrinking end of the limit block 61 is arranged on the inner side surface of the valve body 64, and the end surface of the limit block 61 is abutted on the end surface of the valve core 62, and the end surface of the valve body 64 is abutted on the step surface 611; a stable supporting structure is formed, which enhances the structural stability of the check valve 6, ensures the precise positioning of the valve core 62, and helps the accurate operation of the valve core 62 when opening and closing, ensuring the stability and reliability of operation.

[0041] On the basis of the above embodiment, the side of the valve core 62 that is opposite to the inner bottom of the valve body 64 is concave to form an abutment groove 621, and one end of the compression spring 63 is arranged in the abutment groove 621, and the end face is abutted against the bottom of the abutment groove 621; through the concave abutment groove 621, the elastic force of the compression spring 63 can be more effectively transmitted to the valve core 62, and the abutment groove 621 provides a stable support point for the compression spring 63, ensuring that the compression spring 63 will not deviate during the expansion and contraction process, thereby enhancing the stability of the check valve 6.

[0042] On the basis of the above-mentioned embodiment, the valve core 62 is provided with a convex guide surface 622, the guide surface 622 is a circular arc shape, and is convexly arranged towards the side where the air inlet 11 is located; the circular arc-shaped guide surface 622 is helpful for smoothing the airflow, so that the gas pressure can form a stable pushing action on the valve core 62, thereby improving the response speed of the valve core 62, ensuring the stability of the movement of the valve core 62, reducing the deviation and vibration of the valve core 62, and improving the overall performance of the check valve 6.

[0043] On the basis of the above-mentioned embodiment, the air inlet 11 and the air outlet 12 are both provided with a plug seat 7, the plug seat 7 is fixedly connected with the shell 1 through bolts, so as to form a plugging effect on the air inlet 11 or the air outlet 12, avoiding that the compressor enters water, impurities or leaks lubricating oil before being connected to the automobile air conditioning system.

[0044] Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiment, and the above-mentioned embodiment and the description in the specification are only to illustrate the principle 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. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A special-shaped airway silencer and anti-return structure for a rotary vane compressor, characterized in that: include: A housing and a front end cover provided on one side of an open end of the housing, wherein an air inlet and an air outlet are provided on an outer surface of the housing, wherein the air inlet is provided near one end of the front end cover, and the air outlet is provided away from one end of the front end cover; An end cover cavity is provided on the side of the front end cover facing the shell, and an air guide cavity, a working cavity and an exhaust cavity are provided inside the shell. The air guide cavity is provided at the air inlet, and the end cover cavity is connected to the air guide cavity and the working cavity. The exhaust cavity is provided at the air outlet and is connected to the end of the working cavity away from the end cover cavity; the air guide cavity is provided in an L-shape, and a check valve is provided in the air guide cavity.

2. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 1 is characterized in that: The air guide cavity includes a radial channel and an axial channel connected vertically, the radial channel is connected to the air inlet, the axial channel is connected to the end cover cavity, and the check valve is clamped in the radial channel at the connection between the radial channel and the axial channel.

3. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 2, characterized in that: The radial channel includes an air intake section, a throttling section and an expansion section. The air intake section is arranged at the air inlet, the throttling section is located between the air intake section and the expansion section, and the aperture of the throttling section is smaller than the air intake section. The expansion section is vertically connected to the axial channel, and the aperture of the expansion section is larger than the aperture settings of the air intake section and the throttling section.

4. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 3, characterized in that: The aperture of the expanded diameter section is 20 mm to 30 mm.

5. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 3, characterized in that: The check valve includes a limit block, a valve core, a compression spring and a valve body. The limit block is clamped in the throttling section, and one end is connected to the end of the valve body. The valve core and the compression spring are both arranged between the limit block and the valve body, and the two ends of the compression spring are respectively arranged to abut the valve core and the inner end surface of the valve body.

6. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 5, characterized in that: A plurality of ventilation grooves are provided on the outer surface of the valve body. The ventilation grooves are arranged through-through, and the distances between adjacent ventilation grooves are equal.

7. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 6, characterized in that: The limit block shrinks toward the outer axial surface of the valve body to form a step surface. The shrinkage end of the limit block is arranged on the inner side of the valve body, and the end face of the valve core is abutted against the end face of the limit block under the action of the compression spring, and the end face of the valve body is abutted against the step surface.

8. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 7, characterized in that: The valve core is concavely arranged on one side opposite to the inner bottom of the valve body to form an abutment groove. One end of the compression spring is arranged in the abutment groove, and the end face is abutted against the bottom of the abutment groove.

9. The special-shaped air duct silencer and anti-return structure of the rotary vane compressor according to claim 8, characterized in that: The valve core is provided with a raised guide surface, which is arc-shaped and is raised toward the side where the air inlet is located.

10. The special-shaped air duct silencer and anti-return structure of a rotary vane compressor according to claim 1, characterized in that: The air inlet and the air outlet are both provided with blocking seats, and the blocking seats are fixedly connected to the shell through bolts.

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