Exhaust valve assembly, compressor and air conditioner

Abstract

The present application provides an exhaust valve assembly, a compressor, and an air conditioner. The exhaust valve assembly includes a flange (1) and an exhaust assembly. The flange (1) is provided with a valve seat (2). Along the rotation direction of the main shaft, at least two exhaust ports (3) are sequentially arranged on the valve seat (2). The exhaust assembly is arranged on the valve seat (2). The exhaust assembly includes a valve plate (4) capable of closing the exhaust port (3). A groove (5) is arranged on the outer peripheral side of the exhaust port (3), and a damping material (6) is arranged in the groove (5). Along the rotation direction of the main shaft, the loss factor of the damping material (6) decreases sequentially. According to the exhaust valve assembly of the present application, the vibration and noise generated by the compressor during the exhaust process can be reduced. At the same time, the reaction force received by the valve plate is reduced, and the service life of the valve plate is improved.

Description

Technical Field

[0001] This application relates to the technical field of compressors, and particularly to an exhaust valve assembly, a compressor, and an air conditioner. Background Art

[0002] Due to the inherent characteristics of a sliding vane compressor, there are at least two vanes and at least two compression chambers in the compressor pump body. When the compressor valve plate closes, the vane slides past the exhaust port at a high speed. When the vane passes through the exhaust port, the pressure difference before and after is large. When the valve plate closes, the pressure at the exhaust port is already the medium pressure or even low pressure in the rear chamber. Under the action of its own elastic force and differential pressure force, the valve plate accelerates towards the exhaust valve seat and strikes it, generating vibration and noise; there are relatively few related improvement patent technologies for sliding vane compressors.

[0003] Similar problems also occur in other types of compressors. For example, when a rotary compressor operates at high speed, due to the too-fast operation of the compressor, the rebound speed of the valve plate is insufficient, resulting in delayed closing of the valve plate. The external pressure of the pump body is the high exhaust pressure, and the inside of the pump body is still in the compression stage or even the suction stage. The high pressure difference inside and outside the pump body will cause a large rebound force of the valve plate. When the valve plate contacts the valve seat instantaneously, it will cause vibration of the compressor; the same situation also occurs in the intermediate relief valve of a scroll compressor. When the compressor is in an air conditioning system, its vibration will affect the pipeline stability of the system, the system noise, and the noise problem of the compressor itself.

[0004] For a compressor with multiple exhaust ports, due to the different exhaust characteristics of each exhaust port, the impact forces when the valve plate strikes the valve seat are different, making it difficult to effectively control the vibration and noise generated during the exhaust process of the compressor. The reaction force received by the valve plate is relatively large, affecting the service life of the valve plate. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide an exhaust valve assembly, a compressor, and an air conditioner, which can reduce the vibration and noise generated during the exhaust process of the compressor, while reducing the reaction force received by the valve plate and improving the service life of the valve plate.

[0006] To solve the above problems, this application provides an exhaust valve assembly for a sliding vane compressor, including a flange and an exhaust assembly. The flange is provided with a valve seat. The valve seat is sequentially provided with at least two exhaust ports along the rotation direction of the main shaft. The exhaust assembly is arranged on the valve seat. The exhaust assembly includes a valve plate capable of closing the exhaust port. A groove is provided on the outer peripheral side of the exhaust port, and a damping material is arranged in the groove. Along the rotation direction of the main shaft, the loss factor of the damping material decreases sequentially.

[0007] Preferably, an annular protrusion is provided at the exhaust port, the damping material is disposed on the outer peripheral side of the annular protrusion, the axial height of the damping material relative to the mounting surface of the valve seat is t, the axial height of the annular protrusion relative to the mounting surface of the valve seat is h, and t - h = 0 to 0.5 mm.

[0008] Preferably, the outer peripheral surface of the annular protrusion is a cylindrical surface, the inner peripheral surface of the damping material is a cylindrical surface, and the inner peripheral surface of the damping material is in contact with the outer peripheral surface of the annular protrusion.

[0009] Preferably, the damping material is annular; or, the damping material is arc-shaped, and multiple sections of damping material are arranged at intervals along the circumferential side of the exhaust port; or, the damping material is rectangular, and multiple sections of damping material are arranged at intervals along the circumferential side of the exhaust port.

[0010] Preferably, the circumferential side of the exhaust port is a plane, a groove is provided on the plane, the groove extends along the circumferential direction of the exhaust port, the damping material is embedded in the groove, and the height of the damping material is higher than the plane.

[0011] Preferably, the distance between the inner edge of the damping material close to the exhaust port and the central axis of the exhaust port is R1, the distance between the outer edge of the damping material far from the exhaust port and the central axis of the exhaust port is R2, and the distance between the outer edge of the head of the valve plate and the central axis of the exhaust port is R3, and R3 > R2 > R1.

[0012] Preferably, the circumferential side of the exhaust port is a plane, a groove is provided on the plane, the damping material is annular, an annular flange is provided on the end surface of the damping material facing the plane, the annular flange is embedded in the groove, and the end surface of the damping material facing the plane is in contact with the plane.

[0013] Preferably, the damping materials at each exhaust port are the same, and along the rotation direction of the main shaft, the axial height of the damping material gradually decreases.

[0014] Preferably, the damping materials at each exhaust port are different, and along the rotation direction of the main shaft, the damping ratio of the damping material gradually decreases.

[0015] According to another aspect of the present application, a sliding vane compressor is provided, including an exhaust valve assembly, and the exhaust valve assembly is the above-mentioned exhaust valve assembly.

[0016] According to another aspect of the present application, an air conditioner is provided, including an exhaust valve assembly, and the exhaust valve assembly is the above-mentioned exhaust valve assembly.

[0017] The exhaust valve assembly of the sliding vane compressor provided by the present application includes a flange and an exhaust assembly. The flange is provided with a valve seat, and at least two exhaust ports are sequentially arranged on the valve seat along the rotation direction of the main shaft. The exhaust assembly is arranged on the valve seat and includes a valve plate capable of closing the exhaust port. A groove is arranged on the outer peripheral side of the exhaust port, and damping material is arranged in the groove. Along the rotation direction of the main shaft, the loss factor of the damping material decreases sequentially. This exhaust valve assembly is applied to a sliding vane compressor, and can, according to the different characteristics of multiple exhaust ports of the sliding vane compressor, reduce the energy transmitted to the valve seat when the exhaust valve plate closes by changing the material and form of the valve seat on the periphery of the exhaust port, so that the loss factor of the damping material arranged on the periphery of each exhaust port matches the exhaust speed at this exhaust port, thereby enabling the damping capacity of the damping material on the periphery of the exhaust port to match the falling speed of the valve plate at this exhaust port, enabling the slapping energy of the valve plate corresponding to each exhaust port to be fully absorbed, reducing the acting force of the valve plate slapping the valve seat when closing, thereby being able to reduce the vibration and noise generated by the compressor during the exhaust process, and at the same time reducing the reaction force received by the valve plate and improving the service life of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic exploded view of a pump body assembly according to an embodiment of the present application;

[0019] Figure 2 is a schematic structural view of an exhaust valve assembly according to an embodiment of the present application;

[0020] Figure 3 is a schematic internal structural view of a pump body assembly according to an embodiment of the present application;

[0021] Figure 4 is a schematic structural view of an exhaust valve assembly according to an embodiment of the present application;

[0022] Figure 5 is Figure 4 an enlarged schematic structural view of part A of

[0023] Figure 6 is a schematic structural view of an exhaust valve assembly according to an embodiment of the present application;

[0024] Figure 7 is a schematic structural view of an exhaust valve assembly according to an embodiment of the present application;

[0025] Figure 8 is a schematic structural view of the damping material of an exhaust valve assembly according to an embodiment of the present application;

[0026] Figure 9 is a schematic structural view of the valve seat of an exhaust valve assembly according to an embodiment of the present application.

[0027] The reference numerals are shown as:

[0028] 1. Flange; 2. Valve seat; 3. Exhaust port; 4. Valve disc; 5. Groove; 6. Damping material; 7. Annular protrusion; 8. Annular flange; 9. Sliding vane; 10. Lift limiter; 11. Plane. Detailed implementation manner

[0029] Referring to Figures 1 to 9 As shown, according to an embodiment of the present application, the exhaust valve assembly of a sliding vane compressor includes a flange 1 and an exhaust assembly. The flange 1 is provided with a valve seat 2. Along the rotation direction of the main shaft, at least two exhaust ports 3 are sequentially arranged on the valve seat 2. The exhaust assembly is arranged on the valve seat 2. The exhaust assembly includes a valve disc 4 capable of closing the exhaust port 3. A groove 5 is arranged on the outer peripheral side of the exhaust port 3, and a damping material 6 is arranged in the groove 5. Along the rotation direction of the main shaft, the loss factor of the damping material 6 decreases sequentially.

[0030] This exhaust valve assembly is applied to a compressor. It can, according to the different characteristics of multiple exhaust ports 3 of the compressor, reduce the energy transmitted to the valve seat 2 when the exhaust valve disc 4 closes by changing the material and form of the valve seat 2 on the periphery of the exhaust port 3, so that the loss factor of the damping material 6 arranged on the periphery of each exhaust port 3 matches the exhaust speed at this exhaust port 3. Thus, the damping ability of the damping material 6 on the periphery of the exhaust port 3 can match the falling speed of the valve disc 4 at this exhaust port 3, enabling the slapping energy of the valve disc 4 corresponding to each exhaust port 3 to be fully absorbed, reducing the acting force of the valve disc 4 slapping the valve seat 2 when closing, thereby reducing the vibration and noise generated by the compressor during the exhaust process, and at the same time reducing the reaction force received by the valve disc 4 and improving the service life of the valve disc 4.

[0031] The above-mentioned exhaust valve assembly is particularly applicable to a sliding vane compressor, and can also be applicable to a scroll compressor or a rotor compressor, etc.

[0032] The loss factor refers to the ability of a deformed material to release the stored energy generated by the deformation in the form of heat. The larger the loss factor, the stronger the ability of the material to convert vibration energy into heat, and the stronger the vibration and noise reduction effect.

[0033] The above-mentioned damping material is a high-damping metal, such as manganese copper alloy, etc., or an engineering plastic, such as PTFE, etc.

[0034] In this embodiment, this exhaust valve assembly is applied to the pump body assembly of a sliding vane compressor. The pump body assembly includes an upper flange, a cylinder, rollers, a main shaft, a lower flange, a sliding vane 9, etc. The exhaust valve assembly can be arranged on the upper flange or on the lower flange. The rollers are rotatably arranged in the cylinder. The sliding vane 9 is slidably arranged on the rollers, and the head of the sliding vane 9 abuts against the inner wall of the cylinder. At least two sliding vanes 9 are arranged on the rollers, so that the inside of the cylinder is divided into at least two compression chambers.

[0035] In one embodiment, an annular protrusion 7 is provided at the exhaust port 3. The damping material 6 is disposed on the outer peripheral side of the annular protrusion 7. The axial height of the damping material 6 relative to the mounting surface of the valve seat 2 is t, and the axial height of the annular protrusion 7 relative to the mounting surface of the valve seat 2 is h, where t - h = 0 to 0.5 mm. In this embodiment, by providing the annular protrusion 7, the annular protrusion 7 can be used to cooperate with the valve plate 4. The deformation ability of the annular protrusion 7 can be improved by virtue of the relatively small radial thickness of the annular protrusion 7. The vibration generated when the valve plate 4 strikes the valve seat 2 can be eliminated by using the deformation ability of the annular protrusion 7, thereby reducing vibration and noise. By disposing the damping material 6 on the outer peripheral side of the annular protrusion 7, and the axial height of the damping material 6 is higher than the axial height of the annular protrusion 7, during the process of the valve plate 4 striking the valve seat 2, the valve plate 4 can first strike on the damping material 6, eliminating most of the vibration energy and noise, and then strike on the annular protrusion 7. By the mutual cooperation of the annular protrusion 7 and the damping material 6, the vibration and noise generated by the valve plate 4 hitting the valve seat 2 can be further eliminated, achieving a more effective vibration and noise reduction effect. In addition, by providing the annular protrusion 7 on the inner peripheral side of the damping material 6, the sealing performance of the exhaust port 3 can also be ensured after the deformation amount of the damping material 6 is too large.

[0036] In this embodiment, the cross-sectional shape of the groove 5 is, for example, an annular shape, a square annular shape, an arc shape, a rectangular shape, etc., or it can also be other shapes, and the shape of the damping material 6 is adapted to the shape of the groove 5.

[0037] The damping material 6 can be fixed in the groove 5 by means of adhesion, embedding, or fixing with fixing parts, etc.

[0038] In one embodiment, the outer peripheral surface of the annular protrusion 7 is a cylindrical surface, the inner peripheral surface of the damping material 6 is a cylindrical surface, and the inner peripheral surface of the damping material 6 is in contact with the outer peripheral surface of the annular protrusion 7.

[0039] When the damping material 6 is in contact with the annular protrusion 7, the damping ability of the damping material 6 and the deformation ability of the annular protrusion 7 can be utilized, enabling the two to interact with each other, improving the vibration and noise reduction effect. At the same time, the annular protrusion 7 can be used to further support the damping material 6, which can reduce the depth requirement for the groove 5 on the mounting surface of the damping material 6 and ensure the structural strength of the valve seat 2.

[0040] In one embodiment, the damping material 6 is annular; or, the damping material 6 is arc-shaped, and multiple sections of the damping material 6 are arranged at intervals along the circumferential side of the exhaust port 3; or, the damping material 6 is rectangular, and multiple sections of the damping material 6 are arranged at intervals along the circumferential side of the exhaust port 3.

[0041] In one embodiment, the circumferential side of the exhaust port 3 is a plane 11, a groove 5 is provided on the plane 11, the groove 5 extends along the circumferential direction of the exhaust port 3, a damping material 6 is embedded in the groove 5, and the height of the damping material 6 is higher than that of the plane 11.

[0042] In this embodiment, the height of the damping material 6 is higher than the top surface height of the exhaust port 3. When the valve plate 4 is closed, the head of the valve plate 4 contacts the damping material 6, and the head of the valve plate is completely supported by the damping material 6, which can absorb greater slapping energy. In this embodiment, in order to ensure that the damping material 6 can be stably fixed on the valve seat 2, the depth of the groove 5 for setting the damping material 6 needs to be slightly deeper.

[0043] In one embodiment, the distance between the inner edge of the damping material 6 close to the exhaust port 3 and the central axis of the exhaust port 3 is R1, the distance between the outer edge of the damping material 6 far from the exhaust port 3 and the central axis of the exhaust port 3 is R2, and the distance between the outer edge of the head of the valve plate 4 and the central axis of the exhaust port 3 is R3, and R3 > R2 > R1. In this embodiment, the head of the valve plate 4 completely covers the damping material 6, so it can completely slap on the damping material 6, and the vibration reduction and noise reduction effect of the damping material can be maximized.

[0044] In one embodiment, the circumferential side of the exhaust port 3 is a plane 11, a groove 5 is provided on the plane 11, the damping material 6 is annular, an annular flange 8 is provided on the end surface of the damping material 6 facing the plane 11, the annular flange 8 is embedded in the groove 5, and the end surface of the damping material 6 facing the plane 11 is attached to the plane 11. In this embodiment, the damping material 6 is divided into two parts, one part is the annular flange 8 fitted with the groove 5, and the other part is an annular flat plate structure, so that the installation and bearing of the damping material 6 have different structures, which can have a larger bearing surface, make the contact area between the damping material 6 and the head of the valve plate 4 and the valve seat 2 larger, and can more effectively buffer the impact function of the valve plate 4 while improving the reliability of the damping material 6.

[0045] In one embodiment, the damping materials 6 at each exhaust port 3 are the same, and along the rotation direction of the main shaft, the axial height of the damping material 6 gradually becomes smaller.

[0046] In the rotation direction of the main shaft, the exhaust port 3 in the more forward position needs to absorb more vibration energy. Therefore, the damping material 6 arranged around the exhaust port 3 correspondingly needs a suitable material and structure to consume the energy of the valve plate 4 hitting the valve seat 2. By increasing the axial height of the damping material 6, the damping ratio of the damping material 6 can be increased, that is, the more forward the exhaust port 3 is, the greater the axial height of the damping material 6 and the greater the damping ratio, for the vibration reduction of the slapping force of the valve plate 4.

[0047] In this embodiment, taking the number of exhaust ports 3 as 3 for example, along the rotation direction of the main shaft, the 3 exhaust ports 3 are b1, b2, and b3 in sequence, and the damping materials 6 are a1, a2, and a3 in sequence. Among them, the height of a1 is h1, the loss factor is η1, the height of a2 is h2, the loss factor is η2, the height of a3 is h3, the loss factor is η3, h1 > h2 > h3, and η1 > η2 > η3.

[0048] In one embodiment, along the rotation direction of the main shaft, assuming that the axial distance between the axis of the first exhaust port and the axis of the second exhaust port is L1, the axial distance between the axis of the second exhaust port and the axis of the third exhaust port is L2... There is the following numerical relationship between the ratio of the height of the damping material and the axial distance of the exhaust port: h1 / h2 = L1 / 9, h2 / h3 = L2 / 9,.... By limiting the relationship between the distance between the exhaust ports and the height of the damping material, it is possible to correlate the change in the valve plate flapping force based on the exhaust pressure caused by the change in the position of the exhaust port, and determine the change in the thickness of the damping material according to the change in the valve plate flapping force, so that the structural design of the damping material is correlated with the change in the exhaust pressure of the exhaust port, making the thickness design of the damping material adapt to the position design of the exhaust port, with a more reasonable structural design and better vibration reduction and noise reduction effects.

[0049] In one embodiment, the damping materials 6 at each exhaust port 3 are different, and along the rotation direction of the main shaft, the damping ratios of the damping materials 6 decrease in sequence. By using the change in the damping ratio, it is also possible to ensure that along the rotation direction of the main shaft, the loss factors of the respective damping materials 6 decrease in sequence.

[0050] The exhaust valve assembly further includes a lift limiter 10 for limiting the upward lift stroke of the valve plate 4. When the valve plate 4 opens, the valve plate 4 warps upward around the lift limiter 10, and the lift limiter 10 plays a role in restricting the opening height of the valve plate 4, which can prevent the valve plate 4 from opening too large without an opening limit, resulting in too short a fatigue life of the valve plate 4.

[0051] There are at least two sliding vanes 9 inside the sliding vane compressor, forming at least two compression chambers. There are at least two exhaust ports 3 on the upper flange. The two chambers before and after the sliding vane 9 are divided into a front chamber and a rear chamber. When the pressure in the front chamber reaches a certain value, the valve plate 4 opens and tilts, and the high-pressure refrigerant is discharged from the exhaust flow hole. When the sliding vane 9 completely passes by the exhaust port 3, the internal pressure of the exhaust port 3 instantaneously switches from the high pressure in the front chamber to the medium pressure or even the low pressure of suction in the rear chamber, while the pressure on the upper surface of the valve plate 4 is the high pressure of the exhaust pressure. Under the action of its own elastic force and the large pressure difference force, the valve plate 4 accelerates and hits the valve seat 2. The more forward the exhaust port 3 is arranged, the smaller the pressure in the rear chamber when the sliding vane 9 passes by instantaneously, the greater the formed pressure difference force between the front and rear, and the greater the energy generated by the closing of the valve plate 4. The closing of the valve plate 4 generates great vibration and noise, and is transmitted to other parts of the compressor to excite more noise. At the same time, the valve plate 4 has a risk of fracture. Therefore, the damping material 6 around the forward exhaust port requires a greater loss factor.

[0052] The closing order of the exhaust ports is exhaust port a1, exhaust port a2, and exhaust port a3. During the closing process of the valve plate 4, the pressure difference relationship between the upper and lower of the valve plate 4 of each exhaust port 3 is ΔP1>ΔP2>ΔP3. Therefore, the thickness h1>h2>h3 of the damping material 6 is made.

[0053] After the damping material 6 is provided, the head of the valve plate 4 closes and first strikes on the damping material 6. When the damping material 6 is insufficient to absorb the striking energy, the head of the valve plate then contacts the top surface of the exhaust port 3 to complete the closing process of the valve plate 4. The damping material 6 can slow down the vibration and abnormal noise generated by the closing of the valve plate, and can also play a blocking role on the vibration transmission path, improve the noise quality of the compressor, and at the same time reduce the striking stress of the valve plate 4 and improve the reliability of the valve plate.

[0054] According to an embodiment of the present application, the compressor includes an exhaust valve assembly, and this exhaust valve assembly is the above-mentioned exhaust valve assembly.

[0055] According to an embodiment of the present application, the air conditioner includes an exhaust valve assembly, and this exhaust valve assembly is the above-mentioned exhaust valve assembly.

[0056] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned various advantageous ways can be freely combined and superimposed.

[0057] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An exhaust valve assembly, characterized in that, it includes a flange (1) and an exhaust assembly. The flange (1) is provided with a valve seat (2). Along the rotation direction of the main shaft, at least two exhaust ports (3) are sequentially arranged on the valve seat (2). The exhaust assembly is arranged on the valve seat (2). The exhaust assembly includes a valve plate (4) capable of closing the exhaust port (3). A groove (5) is arranged on the outer peripheral side of the exhaust port (3), and a damping material (6) is arranged in the groove (5). Along the rotation direction of the main shaft, the loss factor of the damping material (6) decreases sequentially; The damping materials (6) at each exhaust port (3) are the same. Along the rotation direction of the main shaft, the axial height of the damping material (6) becomes smaller sequentially.

2. The exhaust valve assembly according to claim 1, characterized in that, a circular protrusion (7) is arranged at the exhaust port (3), the damping material (6) is arranged on the outer peripheral side of the circular protrusion (7), the axial height of the damping material (6) relative to the mounting surface of the valve seat (2) is t, and the axial height of the circular protrusion (7) relative to the mounting surface of the valve seat (2) is h, and t - h = 0 to 0.5 mm.

3. The exhaust valve assembly according to claim 2, characterized in that, the outer peripheral surface of the circular protrusion (7) is a cylindrical surface, the inner peripheral surface of the damping material (6) is a cylindrical surface, and the inner peripheral surface of the damping material (6) fits with the outer peripheral surface of the circular protrusion (7).

4. The exhaust valve assembly according to claim 1, characterized in that, the damping material (6) is annular; or, the damping material (6) is arc-shaped, and multiple sections of the damping material (6) are arranged at intervals along the circumferential side of the exhaust port (3); or, the damping material (6) is rectangular, and multiple sections of the damping material (6) are arranged at intervals along the circumferential side of the exhaust port (3).

5. The exhaust valve assembly according to claim 1, characterized in that, the circumferential side of the exhaust port (3) is a plane (11), a groove (5) is arranged on the plane (11), the groove (5) extends along the circumferential direction of the exhaust port (3), the damping material (6) is embedded in the groove (5), and the height of the damping material (6) is higher than the plane (11).

6. The exhaust valve assembly according to claim 1, characterized in that, the distance between the inner edge of the damping material (6) close to the exhaust port (3) and the central axis of the exhaust port (3) is R1, the distance between the outer edge of the damping material (6) far from the exhaust port (3) and the central axis of the exhaust port (3) is R2, and the distance between the outer edge of the head of the valve plate (4) and the central axis of the exhaust port (3) is R3, and R3 > R2 > R1.

7. The exhaust valve assembly according to claim 1, characterized in that, The periphery of the exhaust port (3) is a plane (11), a groove (5) is arranged on the plane (11), the damping material (6) is annular, an annular flange (8) is arranged on the end surface of the damping material (6) facing the plane (11), the annular flange (8) is embedded in the groove (5), and the end surface of the damping material (6) facing the plane (11) is attached to the plane (11).

8. The exhaust valve assembly according to claim 1, characterized in that the damping materials (6) at each exhaust port (3) are different, and along the rotation direction of the main shaft, the damping ratios of the damping materials (6) decrease in sequence.

9. A compressor, characterized in that it includes an exhaust valve assembly, and the exhaust valve assembly is the exhaust valve assembly according to any one of claims 1 to 8.

10. An air conditioner, characterized in that it includes an exhaust valve assembly, and the exhaust valve assembly is the exhaust valve assembly according to any one of claims 1 to 8.

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