Compressor exhaust structure and compressor

Abstract

The present invention provides a compressor exhaust structure and a compressor, wherein a compressor exhaust structure includes: a pump body and a main body, wherein a first groove is provided on the main body, a valve body unit is provided in the first groove, and the valve body unit can move in the first groove; the main body is provided on the pump body, the main body has a hollow cavity, and the hollow cavity is connected to the first groove; the pump body has an exhaust hole, and the first groove is opposite to the exhaust hole; the valve body unit can only move along the central axis direction of the exhaust hole to open or close the exhaust hole, and when the valve body unit opens the exhaust hole, the gas discharged from the exhaust hole can enter the first groove and then enter the hollow cavity. This can overcome the defect in the prior art that during the high-pressure gas discharge process, the exhaust valve plate repeatedly and violently collides between the exhaust baffle and the pump body, which easily causes the exhaust valve plate to break.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor exhaust structure and a compressor. Background Art

[0002] The compressor is the core component of the air-conditioning system, and the exhaust assembly is a key component of the compressor. Low-pressure gas is sucked in from the suction hole of the pump body, and is discharged from the exhaust hole after being compressed to reach the exhaust pressure. Before the pump body completes compression, the exhaust structure must close the pump body to avoid pressure release and cause low cooling capacity of the compressor; after the pump body completes compression, the high-pressure gas must be discharged quickly. The exhaust structure of the existing compressor consists of an elastic exhaust valve plate and a rigid baffle, one end of which is fixed to the pump body of the compressor by screws. During the discharge of high-pressure gas, the exhaust valve plate repeatedly collides violently between the exhaust baffle and the pump body, which can easily cause fatigue fracture of the exhaust valve plate and noise and vibration problems. Summary of the Invention

[0003] Therefore, the compressor exhaust structure and compressor of the present invention can overcome the defect in the prior art that the exhaust valve plate repeatedly and violently collides between the exhaust baffle and the pump body during the discharge of high-pressure gas, which easily causes the exhaust valve plate to break.

[0004] In order to solve the above problems, the present invention provides a compressor exhaust structure, which includes:

[0005] A pump body and a main body, wherein a first groove is provided on the main body, a valve body unit is provided in the first groove, and the valve body unit can move in the first groove. The main body is provided on the pump body, and the main body has a hollow cavity, and the hollow cavity is communicated with the first groove. The pump body has an exhaust hole, and the first groove is opposite to the exhaust hole. The valve body unit can only move along the central axis direction of the exhaust hole to open or close the exhaust hole, and when the valve body unit opens the exhaust hole, the gas discharged from the exhaust hole can enter the first groove and then enter the hollow cavity.

[0006] In some embodiments, the valve body unit includes an elastic member and a valve plate, one end of the elastic member is connected to the main body, and the other end is connected to the valve plate, and the elastic member and the valve plate are located between the main body and the exhaust hole, and the valve plate can move between the main body and the exhaust hole.

[0007] In some embodiments, the first groove can completely accommodate the valve body unit, and the valve body unit can completely move in the first groove. A second through hole is provided on the main body. When the valve body unit opens the exhaust hole, the gas in the first groove can enter the hollow cavity and be discharged outside the main body through the second through hole.

[0008] In some embodiments, the pump body also has two pressure relief holes, one of which is located on one side of the exhaust hole, and the other is located on the other side of the exhaust hole. Three first grooves are provided on the main body, and the three first grooves are opposite to the two pressure relief holes and the exhaust hole one by one.

[0009] In some embodiments, a fixing portion is provided in the first groove, the fixing portion is engaged with one end of the valve body unit, and the fixing portion is located in the first groove near the bottom of the groove relative to the exhaust hole.

[0010] In some embodiments, the fixing portion includes a second groove, the second groove is located at the bottom of the first groove, and the area of ​​the transverse cross-section of the first groove is larger than the area of ​​the transverse cross-section of the second groove, one end of the valve body unit is located in the two grooves, and one end of the valve body unit is interference fit with the second groove.

[0011] In some embodiments, a sink is provided on the pump body, and the exhaust hole is provided at the bottom of the sink. When the valve body unit closes the exhaust hole, the valve body unit is at least partially located in the sink, and at least part of the valve body unit is gap-matched with the sink.

[0012] In some embodiments, the fixing plate is connected to the pump body through a connecting piece, a plurality of connecting holes are provided on the pump body, and the connecting holes are blind hole structures. A plurality of fixing plates are provided on the main body, and a first connecting hole is provided on the fixing plate. The first connecting hole is opposite to the connecting hole one by one, and the connecting piece passes through the first connecting hole and is connected to the inner circumferential wall of the connecting hole.

[0013] In some embodiments, the main body has an end surface connected to the pump body, a sealing groove is provided on the end surface, a sealing member is provided in the sealing groove, and the sealing member can seal the main body and the pump body.

[0014] The present invention also provides a compressor, which includes the compressor exhaust structure described in any of the preceding items.

[0015] The present invention provides a compressor exhaust structure and a compressor, wherein a first groove is provided on the main body, and a valve body unit is provided in the first groove. The valve body unit can move in the first groove, and the valve body unit can only move along the central axis direction of the exhaust hole to make the exhaust hole open and close. In the process of repeated closing of the valve body unit due to the exhaust pressure, it can not only avoid the noise vibration caused by the violent collision between the valve plate and the main body, but also avoid the fatigue fracture of the exhaust valve plate after the impact, thereby increasing the reliability of the compressor parts, increasing the service life of the compressor, and avoiding the occurrence of faults. The movement of the valve body unit is limited by the first groove, and the circumferential movement of the valve body unit is restricted to ensure that the movement trajectory of the valve body unit does not deviate from the center of the first groove. The hollow cavity is connected with the first groove, and can also play a role in silencing the gas discharged from the exhaust hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly of a compressor exhaust structure according to an embodiment of the present invention;

[0017] Figure 2 A cross-sectional structural diagram of a compressor exhaust structure according to an embodiment of the present invention;

[0018] Figure 3 A bottom view of the compressor exhaust structure according to an embodiment of the present invention;

[0019] Figure 4 1 is a cross-sectional structural diagram of a stator plate in a compressor exhaust structure according to an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the elastic member in the compressor exhaust structure according to an embodiment of the present invention.

[0021] The reference numerals indicate:

[0022] 1. Main body; 101. First groove; 102. Fixing part; 103. First through hole; 104. Second through hole; 105. Sealing groove; 2. Pump body; 201. Pressure relief hole; 202. Exhaust hole; 203. Sink; 204. Connecting hole; 205. Oil return hole; 206. Intake hole; 3. Connecting part; 4. Valve body unit; 401. Elastic part; 402. Valve plate; 5. Sealing part. DETAILED DESCRIPTION

[0023] See also Figures 1 to 5As shown, according to an embodiment of the present invention, a compressor exhaust structure is provided, comprising a pump body 2 and a main body 1. The main body 1 is provided with a first groove 101, and a valve body unit 4 is provided in the first groove 101. The valve body unit 4 can move in the first groove 101. The main body 1 is provided on the pump body 2. The main body 1 has a hollow cavity, which is communicated with the first groove 101. The pump body 2 has an exhaust hole 202. The first groove 101 is opposite to the exhaust hole 202. The valve body unit 4 can only move along the central axis direction of the exhaust hole 202 to open or close the exhaust hole 202. Moreover, when the valve body unit 4 opens the exhaust hole 202, the gas discharged from the exhaust hole 202 can enter the first groove 101 and then enter the hollow cavity. In this technical solution, see Figure 1 As shown, the pump body 2 also has an oil return hole 205 and an air intake hole 206, and a first groove 101 is provided on the main body, and a valve body unit 4 is provided in the first groove 101, and the valve body unit 4 can move in the first groove 101, and the valve body unit 4 can only move along the central axis direction of the exhaust hole 202, so that the exhaust hole 202 is opened and closed. In the process of repeated closing of the valve body unit 4 by the exhaust pressure, it can not only avoid the noise vibration caused by the violent collision between the valve plate and the main body, but also avoid the fatigue fracture of the exhaust valve plate after the impact, thereby increasing the reliability of the compressor parts, increasing the service life of the compressor, and avoiding the occurrence of faults. The movement of the valve body unit 4 is limited by the first groove 101, and the circumferential movement of the valve body unit 4 is limited to ensure that the movement trajectory of the valve body unit 4 does not deviate from the center of the first groove 101. The hollow cavity is connected with the first groove 101, and can also play a role in silencing the gas discharged from the exhaust hole 202. At the same time, the main body 1 is used to separate the compressor's exhaust high-pressure chamber from the return oil low-pressure chamber. The return oil low-pressure chamber serves as an oil storage chamber, which stores the return oil and circulates the oil circuit. The exhaust structure also realizes the function of the oil storage chamber, thereby completing the circulation of the lubricating oil in the pump body and the lubrication of the dynamic and static plates, thereby saving oil storage space and improving the refrigeration performance and service life of the compressor.

[0024] In some embodiments, see Figure 2 and Figure 5As shown, the valve body unit 4 includes an elastic member 401 and a valve disc 402. One end of the elastic member 401 is connected to the main body 1, and the other end is connected to the valve disc 402. In addition, the elastic member 401 and the valve disc 402 are located between the main body 1 and the exhaust hole 202, and the valve disc 402 can move between the main body 1 and the exhaust hole 202. In this technical solution, the elastic member 401 and the valve disc 402 are located between the main body 1 and the exhaust hole 202, and the valve disc 402 can move between the main body 1 and the exhaust hole 202, thereby preventing the valve disc 402 from fatigue fracture after being impacted. When the valve disc 402 is repeatedly impacted at high frequency by high-pressure gas, the elastic member 401 cushions the impact force on the valve disc 402, while also preventing noise and vibration generated by the collision between the valve disc 402 and the main body 1.

[0025] Preferably, the elastic member 401 is a spring, and the spring satisfies:

[0026] The initial spring tension F2 should satisfy F2 = P1 × S, where P1 is the exhaust pressure of the exhaust hole 202, and S is the area of ​​the transverse section of the exhaust hole 202;

[0027] The spring compression length h should satisfy F2 = P-(k×F), where P is the maximum load of the spring and k is the spring tension coefficient;

[0028] Spring tension coefficient Where G is the rigidity modulus of the spring material, d is the spring wire diameter, Dm is the spring mean diameter, and Nc is the number of effective coils of the spring.

[0029] In some embodiments, see Figure 3 As shown, the first groove 101 can completely accommodate the valve body unit 4, and the valve body unit 4 can completely move within the first groove 101. The main body 1 is provided with a second through hole 104. When the valve body unit 4 opens the exhaust hole 202, the gas in the first groove 101 can enter the hollow cavity and be discharged outside the main body 1 through the second through hole 104. In this technical solution, when the valve body unit 4 opens the exhaust hole 202, the gas in the first groove 101 can enter the hollow cavity. The hollow cavity provides a gathering space for the gas in the first groove 101, and is eventually discharged through the second through hole 104.

[0030] In some embodiments, see Figure 4As shown, the pump body 2 is also provided with two pressure relief holes 201, one of the pressure relief holes 201 is located on one side of the exhaust hole 202, and the other pressure relief hole 201 is located on the other side of the exhaust hole 202. The main body 1 is provided with three first grooves 101, and the three first grooves 101 are opposite to the two pressure relief holes 201 and the exhaust hole 202. In this technical solution, the pump body 2 is also provided with two pressure relief holes 201. When the exhaust pressure of the compressor is higher than the suction pressure, the compressor cannot exhaust during the compression process, resulting in over-compression, which increases power consumption and affects the energy efficiency of the entire machine. At this time, the high-pressure gas can push open the valve body unit 4 opposite to the pressure relief hole 201 to complete the pressure relief and ensure the normal operation of the compressor. The pressure relief hole has an anti-over-compression function, which improves the performance under low-load conditions.

[0031] In some embodiments, a fixing portion 102 is provided within the first groove 101. The fixing portion 102 engages with one end of the valve body unit 4. The fixing portion 102 is located within the first groove 101, relative to the exhaust hole 202, and near the bottom of the groove 101. In this technical solution, the fixing portion 102 engages with one end of the valve body unit 4 to restrict the circumferential movement of the valve body unit 4, thereby preventing the risk of the valve body unit 4 deviating from its path during operation and causing uneven force on the valve disc.

[0032] In some embodiments, the fixing portion 102 includes a second groove located at the bottom of the first groove 101, with the transverse cross-sectional area of ​​the first groove 101 being larger than the transverse cross-sectional area of ​​the second groove. One end of the valve unit 4 is located within the second groove, and the one end of the valve unit 4 forms an interference fit with the second groove. In this technical solution, the interference fit between the one end of the valve unit 4 and the second groove restricts the circumferential movement of the valve unit 4, ensuring that the centerline of the valve unit 4 is always aligned with the centerline of the first groove 101. This prevents noise and vibration caused by violent collisions between the exhaust valve disc and the exhaust cover, while also preventing fatigue fracture of the exhaust valve disc after impact. Preferably, the fixing portion 102 adopts a stepped structure. The diameter of the spring is smaller than that of the first groove 101, thus risking deviation from its path during operation, resulting in uneven force on the valve disc. Therefore, a step is provided at the bottom of the first groove 101, which forms an interference fit with the one end of the spring, to secure the spring and restrict its circumferential movement. Furthermore, the height of the step is relatively small relative to the length of the first groove 101, while the diameter remains unchanged. A step is designed within the first groove 101, creating an interference fit with the spring, limiting the circumferential movement of the spring and ensuring that the spring does not deviate from the center of the first groove 101 during movement. Furthermore, the valve disc 402 is fixedly connected to the spring, and their centers of motion coincide with each other. Therefore, the center of motion of the spring valve disc coincides with the center of motion of the spring.

[0033] In some embodiments, see Figure 4 As shown, the pump body 2 is provided with a sink 203, and the exhaust hole 202 is provided at the bottom of the sink 203. When the valve unit 4 closes the exhaust hole 202, the valve unit 4 is at least partially located in the sink 203, and at least part of the valve unit 4 is loosely fitted with the sink 203. In this technical solution, after the exhaust hole 202 has exhausted air, at least part of the valve unit 4 returns to the static plate sink 203. The valve unit 4 compresses the exhaust hole 202 to prevent the high-pressure gas from being released before reaching the exhaust pressure, which would cause a decrease in the cooling capacity of the compressor.

[0034] In some embodiments, the fixing plate is connected to the pump body 2 via a connector 3. The pump body 2 is provided with a plurality of connecting holes 204, each of which is a blind hole structure. The main body 1 is provided with a plurality of fixing plates, each of which is provided with a first communicating hole 103. The first communicating holes 103 are opposite to the connecting holes 204 one by one. The connector 3 passes through the first communicating holes 103 and is connected to the inner circumferential wall of the connecting hole 204. Specifically, the main body 1 has an end face connected to the pump body 2, and a sealing groove 105 is provided on the end face. A sealing member 5 is disposed in the sealing groove 105. The sealing member 5 can seal the main body 1 and the pump body 2. In this technical solution, the connecting hole 204, the connecting member 3, and the first connecting hole 103 can be threaded holes and screws, and the sealing member 5 can be a rubber sealing ring. Through the sealing groove 105 and the sealing member 5, a sealing effect is played between the main body 1 and the pump body 2, thereby ensuring the stability of the main body 1, preventing the leakage of high-pressure gas in the main body 1, and ensuring that the discharged high-pressure gas can only enter the compressor head cover from the second through hole 104 of the main body 1, and then enter the circulation system outside the compressor from the exhaust hole 202 of the head cover.

[0035] When the compressor exhaust structure of the present invention is applied to a scroll compressor, the core component of the scroll compressor is the pump body, which is composed of an orbiting scroll and a stationary scroll. When the compressor is running, the orbiting scroll rotates inside the stationary scroll, compressing the gas sucked into the pump body into a high-pressure state. When the gas enters the exhaust chamber of the stationary scroll and reaches the exhaust pressure P1, it is discharged from the exhaust hole 202 of the stationary scroll. The stationary scroll is designed with an exhaust hole 202 and two pressure relief holes 201. Their positions and apertures are related to the displacement of the scroll compressor. The lower ends of the three valve body units 4 are respectively placed on the exhaust hole 202 and the pressure relief hole 201 of the stationary disk. In order to ensure that the exhaust valve plate 402 can be opened by the exhaust pressure and then restored to cover the exhaust hole 202 and the pressure relief hole 201, and the valve body unit 4 is required not to shift during repeated compression movements, a groove 203 for placing the exhaust valve plate 402 is designed on the top of the exhaust hole 202 and the pressure relief hole 201, and the exhaust valve plate 402 is clearance-matched with the groove 203. The upper end of the valve body unit 4 is designed with a main body 1 that is tightly fixed. First, the main body 1 has three first grooves 101, which not only limit the movement space of the elastic member 401 for repeated compression, but also ensure that the position of the exhaust valve plate 402 is always above the exhaust hole 202 and the pressure relief hole 201. The top of the main body 1 is designed with a fixing portion 102, which is used for the valve body unit 4 to ensure that the center of the valve body unit 4 is always consistent with the first groove, thereby determining the movement route of the valve body unit 4. The bottom of the main body 1 is designed with a circle of sealing grooves 105 for placing the sealing member 5. The sealing member 5 in the sealing groove 105 of the main body 1 is fixed and pressed by the connecting member 3 to play a sealing role, preventing the high-pressure gas in the exhaust hood from leaking, and ensuring that the discharged high-pressure gas can only enter the compressor head cover from the second through hole 104 of the main body 1, and then enter the circulation system outside the compressor from the exhaust hole 202 of the head cover.

[0036] Low-pressure gas enters the suction chamber from the suction hole 206 of the static scroll, and the orbiting scroll rotates, gradually compressing the inhaled low-pressure gas from the outer chamber inward to the central chamber of the static scroll. When the high-pressure gas in the central chamber reaches the exhaust pressure P1, the high-pressure gas overcomes the initial force F2 of the force-storing elastic member 401 and pushes the exhaust valve plate 402 upward. At this time, the spring valve plate 4 is in an open state, and the high-pressure gas is discharged from the exhaust hole 202 into the inner cavity of the exhaust hood 1. When the exhaust valve plate 402 is pushed open by the high-pressure gas, the buffering effect of the elastic member 401 prevents the exhaust valve plate 402 from hitting the top of the exhaust hood 1, reducing the vibration and noise at the exhaust end. At the same time, the exhaust impact force on the exhaust valve plate 402 is reduced, which greatly extends the service life of the exhaust valve plate 402, reduces the possibility of fatigue fracture of the exhaust valve plate 402, and avoids the occurrence of failures. When exhaust is complete, the exhaust valve disc 402 returns to the static plate sink 203. The initial force of the accumulator spring compresses the exhaust valve disc 402, preventing the high-pressure gas from releasing pressure before reaching the exhaust pressure P1, which would otherwise reduce the compressor's cooling capacity. The high-pressure gas then gathers in the exhaust hood 1 and enters the oil-gas separation structure of the compressor head cover through the second through-hole 104. The separated lubricating oil is stored in the cavity formed by the head cover and the exhaust hood 1 and flows into the pump body through the oil return hole 205, thereby achieving lubricating oil circulation, extending the service life of the pump body, and improving the cooling performance of the compressor.

[0037] The present invention also provides a compressor, comprising the above-mentioned compressor exhaust structure.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A scroll compressor exhaust structure, characterized by: include: A pump body (2) and a main body (1), wherein the main body (1) is provided with a first groove (101), a valve body unit (4) is provided in the first groove (101), and the valve body unit (4) is movable in the first groove (101), the main body (1) is provided on the pump body (2), the main body (1) has a hollow cavity, the hollow cavity is communicated with the first groove (101), the pump body (2) has an exhaust hole (202), the first groove (101) is opposite to the exhaust hole (202), and the valve body unit (4) can only move along the central axis direction of the exhaust hole (202), so that the exhaust hole (202) The valve body unit (4) is open or closed, and when the valve body unit (4) opens the exhaust hole (202), the gas exhausted from the exhaust hole (202) can enter the first groove (101) and then enter the hollow cavity; the first groove (101) can completely accommodate the valve body unit (4), and the valve body unit (4) can move in the first groove (101), and the main body (1) is provided with a second through hole (104), and when the valve body unit (4) opens the exhaust hole (202), the gas in the first groove (101) can enter the hollow cavity and be discharged outside the main body (1) through the second through hole (104); The pump body (2) further comprises two pressure relief holes (201), one of the pressure relief holes (201) being located on one side of the exhaust hole (202), and the other of the pressure relief holes (201) being located on the other side of the exhaust hole (202). The main body (1) comprises three first grooves (101), and the three first grooves (101) are respectively opposite to the two pressure relief holes (201) and the exhaust hole (202); The valve body unit (4) comprises an elastic member (401) and a valve plate (402), one end of the elastic member (401) is connected to the main body (1), and the other end is connected to the valve plate (402), and the elastic member (401) and the valve plate (402) are located between the main body (1) and the exhaust hole (202), and the valve plate (402) can move between the main body (1) and the exhaust hole (202); The pump body (2) also has an oil return hole (205), which is arranged on the pump body (2) at a distance from the main body (1), and the separated lubricating oil flows into the pump body (2) through the oil return hole (205).

2. The scroll compressor exhaust structure according to claim 1, characterized in that: A fixing portion (102) is provided in the first groove (101), the fixing portion (102) being engaged with one end of the valve body unit (4), and the fixing portion (102) being located in the first groove (101) near the bottom of the first groove (101) relative to the exhaust hole (202).

3. The scroll compressor exhaust structure according to claim 2, characterized in that: The fixing portion (102) includes a second groove, the second groove is located at the bottom of the first groove (101), and the area of ​​the transverse cross-section of the first groove (101) is larger than the area of ​​the transverse cross-section of the second groove. One end of the valve body unit (4) is located in the second groove, and one end of the valve body unit (4) is interference-fitted with the second groove.

4. The scroll compressor exhaust structure according to claim 1, characterized in that: A sink groove (203) is provided on the pump body (2), and the exhaust hole (202) is provided at the bottom of the sink groove (203). When the valve body unit (4) closes the exhaust hole (202), the valve body unit (4) is at least partially located in the sink groove (203), and at least a portion of the valve body unit (4) is clearance-matched with the sink groove (203).

5. The scroll compressor exhaust structure according to claim 1, characterized in that: The main body (1) is provided with a plurality of fixing plates, the fixing plates being connected to the pump body (2) via a connecting member (3), the pump body (2) being provided with a plurality of connecting holes (204), the connecting holes (204) being blind hole structures, the fixing plates being provided with a first communicating hole (103), the first communicating holes (103) being opposite to the connecting holes (204) one by one, the connecting member (3) passing through the first communicating hole (103) and being connected to the inner peripheral wall of the connecting hole (204).

6. The scroll compressor exhaust structure according to claim 1, characterized in that: The main body (1) has an end face connected to the pump body (2), a sealing groove (105) is provided on the end face, a sealing member (5) is provided in the sealing groove (105), and the sealing member (5) can seal the main body (1) and the pump body (2).

7. A compressor, characterized in that: The invention comprises the scroll compressor exhaust structure according to any one of claims 1 to 6.

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