Scroll compressor

Abstract

The invention relates to a scroll compressor. The scroll compressor comprises a static scroll plate, a dynamic scroll plate, a high-pressure partition plate, a high-pressure cover plate, an exhaust valve and a pressure release valve. Wherein the orbiting scroll is configured to be matched with the static scroll to form a compression cavity with variable volume; the high-pressure partition plate is arranged on the static scroll plate; the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity; the exhaust valve is configured to be communicated with the compression cavity and the exhaust cavity when the exhaust pressure of the compressor is reached; the pressure release valve is arranged on the high-pressure partition plate and is configured to communicate the compression cavity with the exhaust cavity when the pressure in the compression cavity exceeds the exhaust pressure. According to the scroll compressor disclosed by the invention, the pressure release valve is arranged on the high-pressure partition plate, and high pressure in the exhaust cavity directly acts on the high-pressure partition plate instead of directly acting on the static scroll plate, so that the acting force on the static scroll plate is relatively reduced, the risk that the scroll blades of the static scroll plate are stressed and deformed is reduced, and the service life of the scroll compressor is prolonged. And the service life, the performance and the reliability are ensured.

Description

Technical Field

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

[0002] As a typical structure of compressor, scroll compressor is mainly used in air conditioning, refrigeration, general gas compression, as well as in automobile engine superchargers and vacuum pumps, and can replace traditional medium and small reciprocating compressors to a large extent.

[0003] See also Figure 1 and Figure 2 The typical structure of a scroll compressor includes at least a fixed scroll 1, a movable scroll 2 and a body 3. The fixed scroll 1 and the movable scroll 2 both have spiral blades, and the two are 180° staggered and meshed with each other. The movable scroll 2 is driven by a crankshaft 4 with a very small eccentricity, and is constrained by an anti-rotation mechanism to make a planar motion with a very small radius around the fixed scroll 1, thereby forming a series of crescent-shaped cylindrical working volumes in cooperation with the end plate.

[0004] During one rotation of the crankshaft 4 of the scroll compressor, the three working processes of suction, compression and exhaust are carried out simultaneously. The outer space is connected with the suction port 10 and is always in the suction process. The inner space is connected with the exhaust hole 11 and is always in the exhaust process, and the exhaust hole 11 is facing the axial direction of the static scroll 1.

[0005] See also Figure 3 , the scroll compressor also includes an exhaust valve. The exhaust valve 5 includes an exhaust valve back plate and an exhaust valve plate. The exhaust valve back plate is fixedly connected to the exhaust hole 11 of the fixed scroll 1 by screws, and there is an axial gap between the exhaust valve back plate and the exhaust hole 11. The exhaust valve plate is located in the axial gap and blocks the exhaust hole 11 under the action of the internal and external pressure difference during the suction and compression process, and leaves the fixed scroll 1 under the action of the internal and external pressure difference during the exhaust process and is stopped by the exhaust valve back plate. At this time, the exhaust hole 11 is opened, and the compressed high-temperature and high-pressure medium is discharged from the exhaust hole 11 until the external air pressure is greater than the internal air pressure, and the exhaust valve plate falls back and resets under the action of its own weight and / or pressure difference, and blocks the exhaust hole 11 again.

[0006] The scroll compressor also includes a high-pressure cover plate, which is fixedly connected to the static scroll 1 and is fixedly connected to the static scroll to form an exhaust chamber. A through hole is provided on the high-pressure cover plate. When the scroll compressor is in exhaust operation, the exhaust valve plate is pushed open until the medium exhaust hole is opened, and the high-temperature and high-pressure medium after compression flows through the medium exhaust hole and the medium hole in sequence into the exhaust chamber, and finally flows into the external pipeline from the one-way valve provided on the high-pressure cover plate and connected to the exhaust chamber.

[0007] The high pressure in the exhaust chamber directly acts on the static scroll 1. The greater the force, the greater the deformation of the vortex blades of the static scroll 1, which is more unfavorable to the performance and reliability of the static scroll.

[0008] In view of this, those skilled in the art need to find another way to solve the problem that the exhaust chamber pressure in the existing scroll compressor is applied to the stationary scroll, causing the stationary scroll to deform. Summary of the invention

[0009] In order to solve the technical problems existing in the prior art, the present disclosure provides a scroll compressor.

[0010] The present disclosure provides a scroll compressor, and the scroll compressor of the present disclosure includes:

[0011] static vortex disk;

[0012] A movable scroll, wherein the movable scroll is configured to cooperate with the fixed scroll to form a compression chamber with a variable volume;

[0013] A high-pressure baffle, arranged on the static vortex disk;

[0014] A high-pressure cover plate connected to the high-pressure partition plate to form an exhaust cavity;

[0015] The pressure relief valve is disposed on the high-pressure partition plate and is configured to connect the compression chamber and the exhaust chamber when the pressure in the compression chamber exceeds the exhaust pressure.

[0016] In one embodiment, the scroll compressor comprises:

[0017] A connecting piece, wherein a secondary exhaust hole is formed on the connecting piece, the secondary exhaust hole of the connecting piece is communicated with the compression chamber, and the connecting piece passes through the high-pressure partition plate and is communicated with the exhaust chamber;

[0018] The pressure relief valve is configured to open or close the secondary exhaust hole on the connecting member based on the relationship between the pressure in the compression chamber and the exhaust pressure.

[0019] In one embodiment, the pressure relief valve includes a pressure relief valve plate, and the pressure relief valve plate is constructed to open the secondary exhaust hole of the connecting member when the pressure in the compression chamber exceeds the exhaust pressure, and to close the secondary exhaust hole of the connecting member when the pressure in the compression chamber does not exceed the exhaust pressure.

[0020] In one embodiment, the pressure relief valve further includes a pressure relief valve seat, which is disposed on the high-pressure partition and has a connecting hole, the secondary exhaust hole is connected to the exhaust chamber through the connecting hole, and the pressure relief valve plate is configured to open or close the connecting hole.

[0021] In one embodiment, the pressure relief valve seat and the high pressure partition are integrally formed.

[0022] In one embodiment, the connecting member and the static scroll are integrally formed.

[0023] In one embodiment, the scroll compressor comprises:

[0024] A connecting piece, wherein the connecting piece is provided with an auxiliary exhaust hole, the auxiliary exhaust hole of the connecting piece is connected to the auxiliary exhaust hole on the static scroll and the auxiliary exhaust hole on the high-pressure partition, the auxiliary exhaust hole on the static scroll is connected to the compression chamber, and the auxiliary exhaust hole on the high-pressure partition is connected to the exhaust chamber;

[0025] The pressure relief valve is configured to open or close the secondary exhaust hole on the high-pressure partition based on the relationship between the pressure in the compression chamber and the exhaust pressure.

[0026] In one embodiment, the connecting member is integrally formed with the static scroll or the high-pressure partition.

[0027] In one embodiment, the pressure relief valve comprises a pressure relief valve back plate, a pressure relief valve sheet, and a return spring pre-compressed between the pressure relief valve back plate and the pressure relief valve sheet;

[0028] The pressure relief valve plate is configured to connect the compression chamber and the exhaust chamber by overcoming the elastic force of the return spring when the pressure in the compression chamber exceeds the exhaust pressure.

[0029] In one embodiment, the pressure relief valve back plate is also provided with a reset hole connected to the exhaust chamber, and the reset hole is constructed to direct the pressure in the exhaust chamber to the pressure relief valve plate to reset the pressure relief valve plate when the pressure in the compression chamber does not exceed the exhaust pressure.

[0030] One of the beneficial effects of the scroll compressor disclosed in the present invention is that the scroll compressor disclosed in the present invention sets the pressure relief valve on the high-pressure partition, and the high pressure in the exhaust chamber directly acts on the high-pressure partition instead of directly acting on the static scroll, thereby relatively reducing the force on the static scroll, and then reducing the risk of the vortex blades of the static scroll being deformed by force, thereby ensuring its service life, performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 It is a partial cross-sectional structural schematic diagram of a scroll compressor;

[0033] Figure 2 It is a schematic diagram of the structure after the movable scroll and the fixed scroll are meshed;

[0034] Figure 3It is a schematic diagram of the axial cross-sectional structure of the existing static scroll and exhaust valve assembly;

[0035] Figure 4 A schematic diagram of a partial cross-sectional structure of a scroll compressor disclosed in one embodiment;

[0036] Figure 5 is a schematic diagram of a partial axial cross-sectional structure of a scroll compressor disclosed in an embodiment of the present invention;

[0037] Figure 6 The diagram is a partial axial cross-sectional structural diagram of a scroll compressor disclosed in the present invention in one embodiment.

[0038] Figures 1 to 6 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0039] 1 stationary scroll, 10 suction port, 11 exhaust hole, 2 movable scroll, 3 engine body, 4 crankshaft, 5 exhaust valve, 6 high-pressure partition, 7 high-pressure cover plate, 70 exhaust chamber, 8 pressure relief valve, 80 pressure relief valve plate, 81 pressure relief valve seat, 82 pressure relief valve back plate, 820 pressure relief exhaust hole, 821 reset hole, 83 reset spring, 9 connecting piece, 1a auxiliary exhaust hole. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] The present disclosure provides a scroll compressor, which includes a fixed scroll, a movable scroll, a high-pressure partition, a high-pressure cover plate, an exhaust valve and a pressure relief valve. The movable scroll is configured to cooperate with the fixed scroll to form a compression chamber with a variable volume; the high-pressure partition is arranged on the fixed scroll; the high-pressure cover plate is connected to the high-pressure partition to form an exhaust chamber; the exhaust valve is configured to connect the compression chamber and the exhaust chamber when the compressor exhaust pressure is reached; the pressure relief valve is arranged on the high-pressure partition and is configured to connect the compression chamber and the exhaust chamber when the pressure in the compression chamber exceeds the exhaust pressure.

[0046] It should be noted that the "medium" mentioned herein refers to compressed gas, refrigerant, and other gases or liquids that can be compressed by a compressor. In addition, the exhaust pressure refers to the pressure in the compression chamber reaching the set pressure that allows normal exhaust to the exhaust chamber, or the pressure in the compression chamber reaching the exhaust valve plate that can push open the exhaust valve, so that the exhaust valve connects the compression chamber and the exhaust chamber, so that the scroll compressor is in a normal exhaust stroke state. The exhaust pressure can be a specific value or a range of values, depending on factors such as the displacement of the scroll compressor.

[0047] The working principle of the scroll compressor is as follows: the movable scroll rotates eccentrically around the fixed scroll, and the volume on the medium suction hole side of the compression chamber formed by the meshing of the two increases to form a pressure difference with the outside of the compression chamber, and the medium to be compressed is sucked into the compression chamber through the medium suction hole. As the movable scroll continues to rotate around the fixed scroll, the volume of the compression chamber where the medium is located does not gradually decrease, and the medium is compressed. Under the suction and compression conditions, the exhaust valve always keeps the medium discharge hole and the discharge channel blocked. As the temperature and pressure of the medium in the compression chamber gradually increase, the exhaust valve makes the medium discharge hole and the discharge channel open, and the high-temperature and high-pressure medium is discharged from the compression chamber through the medium discharge hole, and discharged into the exhaust chamber through the discharge channel, and finally input into the air conditioner and other equipment using the compressed medium through an external pipeline.

[0048] When the pressure in the scroll compression chamber exceeds the exhaust pressure of the compressor, the pressure relief valve opens the secondary exhaust hole under the action of high pressure, and the compression chamber automatically releases pressure to the exhaust chamber through the secondary exhaust hole. The pressure in the compression chamber drops back to near the exhaust pressure, and then the pressure relief valve returns to its original state to close the secondary exhaust hole. The pressure ratio in the compressor decreases, and the volume ratio of the compressor changes accordingly to meet the operation needs of the compressor, effectively preventing over-compression in the scroll compression chamber.

[0049] In the prior art, the pressure relief valve of the scroll compressor is arranged on the stationary scroll, and the upper part of the stationary scroll is located in the exhaust chamber. The pressure in the exhaust chamber directly acts on the stationary scroll, which can easily cause the vortex blades of the stationary scroll to deform, thereby affecting the performance of the stationary scroll.

[0050] In comparison, the scroll compressor disclosed in the present invention sets the pressure relief valve on the high-pressure partition, and the high pressure in the exhaust chamber acts directly on the high-pressure partition instead of directly on the stationary scroll, thereby relatively reducing the force on the stationary scroll, and then reducing the risk of the vortex blades of the stationary scroll being deformed by force, thereby ensuring its service life, performance and reliability.

[0051] For ease of understanding, refer to Figures 4 to 6 , the specific structure and working principle of the scroll compressor disclosed in the present invention are described in detail in combination with specific embodiments.

[0052] See also Figure 4 In this embodiment, the scroll compressor includes a fixed scroll 1, a movable scroll 2, a body 3, an exhaust valve 5, a high-pressure partition plate 6 and a high-pressure cover plate 7.

[0053] The body 3 is usually a thin-walled shell structure, and the space inside the body is sufficient to accommodate the fixed scroll 1 , the movable scroll 2 , and a driving mechanism that drives the movable scroll 2 to rotate around the fixed scroll 1 .

[0054] Both the fixed scroll 1 and the movable scroll 2 have vortex blades, and the two are staggered 180 degrees and mesh with each other. The movable scroll 2 is driven by a crankshaft with a very small eccentricity, and is constrained by an anti-rotation mechanism to make a planar motion with a very small radius around the fixed scroll 1, thereby forming a series of crescent-shaped cylindrical working volumes in cooperation with the end plate.

[0055] It should be noted that, as to the specific structures of the fixed scroll 1, the movable scroll 2 and the body 3 and their mutual assembly relationship, those skilled in the art may adopt the existing technology, which will not be elaborated herein.

[0056] Continue to see Figure 4 In this embodiment, the high pressure partition plate 6 is fixedly connected to the static scroll plate 1, and the two are usually welded together. Of course, on the basis of meeting the processing and assembly process requirements, the two can also be fixedly connected by fasteners such as screws, or riveted or bonded.

[0057] A connecting hole is provided on the high-pressure partition 6, which is connected to the medium discharge hole of the static vortex disk 1, and the two are basically coaxial and have the same radius. This can avoid the pressure on the high-pressure partition 6 when the high-temperature and high-pressure medium is discharged from the compression chamber, causing the risk of the connection between the high-pressure partition 6 and the static vortex disk 1 falling off.

[0058] A sealing ring groove surrounding the medium discharge hole is provided on the mating surface of the static scroll 1 and the high-pressure partition 6, and an elastic sealing ring is pressed into the sealing ring groove to achieve static sealing between the static scroll 1 and the high-pressure partition 6, thereby preventing the compressed high-temperature and high-pressure medium from leaking from between the mating surfaces of the two.

[0059] The high-pressure cover plate 7 and the high-pressure partition plate 6 are fixedly connected by welding, bonding or using fasteners such as screws to form an exhaust chamber 70 .

[0060] The high-pressure cover plate 7 is provided with a discharge port which is connected to the discharge chamber 70, and the discharge port is connected to an external pipeline. Usually, an exhaust check valve (not shown in the figure) is also installed on the external pipeline. The exhaust check valve is used to prevent the refrigeration circuit in the equipment pipeline of the air conditioner from reaching the scroll compressor, that is, to avoid the so-called "refrigerant migration".

[0061] The exhaust valve 5 is arranged on the outer plate surface of the high-pressure partition 6 and is located in the exhaust chamber 70. It should be noted that the directional words "inside" and "outside" used herein are set with the compression chamber as the reference. The side close to the compression chamber on the scroll compressor is the inside, and the side away from the compression chamber is the outside. The exhaust valve 5 is configured to connect the compression chamber and the exhaust chamber when the compressor exhaust pressure is reached.

[0062] The pressure relief valve 8 is disposed on the high-pressure diaphragm 6 and is configured to connect the compression chamber and the exhaust chamber 70 when the pressure in the compression chamber exceeds the exhaust pressure.

[0063] With such arrangement, when the pressure in the scroll compression chamber exceeds the exhaust pressure of the compressor, the pressure relief valve 8 opens the auxiliary exhaust hole 1a under the action of high pressure, and the compression chamber automatically releases pressure to the exhaust chamber 70 through the auxiliary exhaust hole 1a, and the pressure in the compression chamber drops back to near the exhaust pressure, and then the pressure relief valve 8 returns to its original state to close the auxiliary exhaust hole 1a. The pressure ratio in the compressor decreases, and the volume ratio of the compressor changes accordingly to meet the operation needs of the compressor, effectively preventing over-compression in the scroll compression chamber.

[0064] In the prior art, the pressure relief valve 8 of the scroll compressor is arranged on the static scroll 1. The upper part of the static scroll 1 is located in the exhaust chamber 70. The pressure in the exhaust chamber 70 directly acts on the static scroll 1, which can easily cause the vortex blades of the static scroll 1 to deform, thereby affecting the performance of the static scroll 1.

[0065] In comparison, the scroll compressor disclosed in the present invention sets the pressure relief valve 8 on the high-pressure partition 6. The high pressure in the exhaust chamber 70 acts directly on the high-pressure partition 6 instead of directly on the static scroll 1, thereby relatively reducing the force on the static scroll 1, and then reducing the risk of the vortex blades of the static scroll 1 being deformed by force, thereby ensuring its service life, performance and reliability.

[0066] In detail, in one embodiment, combining Figure 4 and Figure 5 The scroll compressor includes a connector 9 , on which a secondary exhaust hole 1 a is formed. The secondary exhaust hole 1 a of the connector 9 is connected to the compression chamber, and the connector 9 passes through the high-pressure partition 6 and is connected to the exhaust chamber 70 .

[0067] The pressure relief valve 8 is configured to open or close the secondary exhaust hole 1 a on the connecting member 9 based on the magnitude relationship between the pressure in the compression chamber and the exhaust pressure.

[0068] With such arrangement, there is no need to process the secondary exhaust hole 1a on the high-pressure partition plate 6. Instead, it is sufficient to process a through hole for the connecting piece 9 to pass through. The size of the through hole is usually larger than that of the secondary exhaust hole 1a, thereby reducing the processing difficulty of the high-pressure cover plate 7.

[0069] In one embodiment, the connecting member 9 can be integrally formed with the static scroll 1, that is, a cylindrical structure is processed on the static scroll 1 to pass through the high-pressure partition 6, and the secondary exhaust hole 1a is processed on the integrally formed structure of the connecting member 9 and the static scroll 1 to connect the compression chamber and the exhaust chamber 70.

[0070] Of course, the connecting part 9 and the stationary scroll 1 of the scroll compressor disclosed in the present invention are processed relatively independently, and the auxiliary exhaust holes 1a are processed on each other, and then the two are assembled together by welding, bonding, bolting, etc., and the auxiliary exhaust holes 1a of the two are connected, and it is best to make the auxiliary exhaust holes 1a of the two coaxially arranged.

[0071] Compared with this structure, the connecting part 9 and the static scroll 1 of the scroll compressor disclosed in the present invention are integrally formed, which not only reduces the number of components in the scroll compressor, but also the auxiliary exhaust hole 1a is directly integrally formed on the connecting part 9 and the static scroll 1, eliminating the steps of independent processing and reassembly, thereby reducing the difficulty of processing and assembly of the overall structure.

[0072] Continue to see Figure 5 In one embodiment, the pressure relief valve 8 of the present disclosure includes a pressure relief valve plate 80, a pressure relief valve seat 81, a pressure relief valve back plate 82 and a return spring 83. The pressure relief valve seat 81 is arranged on the high-pressure partition plate 6 by welding, threading, bonding, etc. and has a connecting hole. The auxiliary exhaust hole 1a on the connecting member 9 is connected to the exhaust chamber 70 through the connecting hole. The pressure relief valve back plate 82 is fixedly connected to the pressure relief valve seat 81. The return spring 83 is pre-compressed between the pressure relief valve back plate 82 and the pressure relief valve plate 80.

[0073] The pressure relief valve plate 80 is configured to overcome the elastic force of the return spring 83 to connect the compression chamber and the exhaust chamber 70 when the pressure in the compression chamber exceeds the exhaust pressure, so as to discharge the gas in the compression chamber into the exhaust valve 5 until the pressure in the compression chamber is reduced to the exhaust pressure or less than the exhaust pressure.

[0074] That is to say, when the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve plate 80 closes the connecting hole on the pressure relief valve seat 81 under the elastic force of the return spring 83, that is, closes the exhaust path connecting the compression chamber and the exhaust chamber 70 through the auxiliary exhaust hole 1a.

[0075] In one embodiment, the return spring 83 may be a compression spring, or an elastic component that can store elastic potential energy after compression, such as a rubber component.

[0076] In one embodiment, the pressure relief valve seat 81 may be integrally formed with the high pressure partition 6 .

[0077] Such an arrangement can reduce the number of components involved in the scroll compressor of the present disclosure, and reduce the difficulty of processing and assembly process.

[0078] That is to say, the pressure relief valve back plate 82 can be directly fixedly connected to the high-pressure partition 6, and when the pressure in the compression chamber does not exceed the exhaust pressure, the pressure relief valve plate 80 is pressed against the auxiliary exhaust hole 1a of the connecting piece 9 by the return spring 83. When the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve plate 80 overcomes the elastic force of the return spring 83 under the action of the internal and external pressure difference to open the auxiliary exhaust hole 1a on the connecting piece 9, so that the compression chamber and the exhaust chamber 70 are connected through the auxiliary exhaust hole 1a, and the scroll compressor starts to relieve pressure.

[0079] See also Figure 6 In one embodiment, the scroll compressor includes a connecting member 9, on which a secondary exhaust hole 1a is opened. The secondary exhaust hole 1a on the connecting member 9 connects the secondary exhaust hole 1a on the static scroll 1 and the secondary exhaust hole 1a on the high-pressure partition 6. The secondary exhaust hole 1a on the static scroll 1 is connected to the compression chamber, and the secondary exhaust hole 1a on the high-pressure partition 6 is connected to the exhaust chamber 70.

[0080] The pressure relief valve 8 is configured to open or close the secondary exhaust hole 1 a on the high-pressure partition plate 6 based on the relationship between the pressure in the compression chamber and the exhaust pressure.

[0081] That is, when the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve 8 opens the auxiliary exhaust hole 1a on the high-pressure partition 6, that is, the compression chamber and the exhaust chamber 70 are connected through the auxiliary exhaust hole 1a on the static scroll 1, the auxiliary exhaust hole 1a on the connecting piece 9, and the auxiliary exhaust hole 1a on the high-pressure partition 6, so as to quickly discharge the pressure in the compression chamber into the exhaust chamber 70 and start to relieve pressure until the pressure in the compression chamber does not exceed the exhaust pressure, at which time the pressure relief valve closes the auxiliary exhaust hole 1a on the high-pressure partition 6 and the pressure relief ends.

[0082] It should be noted that, in the present embodiment, the connecting member 9, the static scroll 1 and the high-pressure partition plate 6 are independently processed and then assembled, and the secondary exhaust holes 1a on the three are connected.

[0083] It can be understood that the connector 9 can be integrally formed with the high-pressure partition 6 so as to reduce the number of components involved in the scroll compressor of the present disclosure, thereby reducing the difficulty of processing and assembly.

[0084] Continue to see Figure 6In the present embodiment, the pressure relief valve 8 disclosed in the present invention includes a pressure relief valve plate 80, a pressure relief valve seat 81, a pressure relief valve back plate 82 and a return spring 83, wherein the pressure relief valve seat 81 is arranged on the high-pressure partition plate 6 by welding, threaded connection, bonding, etc. and has a connecting hole, the secondary exhaust hole 1a on the high-pressure partition plate 6 is connected with the exhaust chamber 70 through the connecting hole, the pressure relief valve back plate 82 is fixedly connected to the pressure relief valve seat 81, and the return spring 83 is pre-tightened between the pressure relief valve back plate 82 and the pressure relief valve plate 80, and the pressure relief valve plate 80 is configured to overcome the elastic force of the return spring 83 to connect the compression chamber and the exhaust chamber 70 when the pressure in the compression chamber exceeds the exhaust pressure, so as to discharge the gas in the compression chamber into the exhaust valve 5 until the pressure in the compression chamber is reduced to the exhaust pressure or less than the exhaust pressure.

[0085] That is to say, when the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve plate 80 closes the connecting hole on the pressure relief valve seat 81 under the elastic force of the return spring 83, that is, closes the exhaust path connecting the compression chamber and the exhaust chamber 70 through the auxiliary exhaust hole 1a.

[0086] In one embodiment, the return spring 83 may be a compression spring, or an elastic component that can store elastic potential energy after compression, such as a rubber component.

[0087] In one embodiment, the pressure relief valve seat 81 can be integrally formed with the high pressure partition 6, see Figure 4 The structure shown in .

[0088] Such an arrangement can reduce the number of components involved in the scroll compressor of the present disclosure, and reduce the difficulty of processing and assembly process.

[0089] That is to say, the pressure relief valve back plate 82 can be directly fixedly connected to the high-pressure partition 6, and when the pressure in the compression chamber does not exceed the exhaust pressure, the pressure relief valve plate 80 is pressed against the auxiliary exhaust hole 1a on the high-pressure partition 6 by the return spring 83. When the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve plate 80 overcomes the elastic force of the return spring 83 under the action of the internal and external pressure difference and opens the auxiliary exhaust hole 1a on the high-pressure partition 6, so that the compression chamber and the exhaust chamber 70 are connected through the auxiliary exhaust hole 1a, and the scroll compressor starts to relieve pressure until the pressure in the compression chamber does not exceed the exhaust pressure, and the pressure relief valve plate 80 closes the auxiliary exhaust hole 1a on the high-pressure partition 6, and the pressure relief ends.

[0090] Further, in order to ensure that the pressure relief valve plate 80 can be smoothly reset, continue to refer to Figure 6 The pressure relief valve back plate 82 of the present invention is also provided with a reset hole 821 connected to the exhaust chamber 70, and the reset hole 821 is constructed to direct the pressure in the exhaust chamber 70 to the pressure relief valve plate 80 to reset the pressure relief valve plate 80 when the pressure in the compression chamber does not exceed the exhaust pressure.

[0091] That is to say, in this embodiment, the pressure relief valve plate 80 can achieve the purpose of resetting by virtue of the dual effects of the resetting spring 83 and the air pressure introduced from the resetting hole 821 .

[0092] Such an arrangement can avoid the problem that the return spring 83 fails or cannot be reset due to the pressure relief valve plate 80 being stuck on the pressure relief valve back plate 82, thereby avoiding the problem that the air flow in the exhaust chamber 70 flows back into the compression chamber when the scroll compressor is in the compression, intake and other working strokes, thereby ensuring the normal and safe operation of the compressor.

[0093] In detail, in this embodiment, the reset hole 821 is arranged on the side plate surface of the pressure relief valve back plate 82 opposite to the pressure relief valve plate 80, that is, on the top plate of the pressure relief valve back plate 82, so that the air pressure introduced into the free exhaust chamber 70 can fully act on the pressure relief valve plate 80 to quickly reset it.

[0094] Furthermore, in order to release the pressure in the compression chamber to the exhaust chamber 70 under pressure relief conditions, in this embodiment, the pressure relief exhaust hole 820 of the pressure relief valve back plate 82 is arranged on the side plate of the pressure relief valve back plate 82, preferably within the minimum stroke range of the pressure relief valve plate 80.

[0095] It should be noted that the solution of providing the reset hole 821 on the pressure relief valve back plate 82 in this embodiment is also applicable to Figure 5 In the illustrated embodiment, those skilled in the art can fully understand and implement this based on the above description, and will not be elaborated herein.

[0096] Of course, in Figure 5 and Figure 6 In the illustrated embodiment, the pressure relief valve 8 of the present invention may only include a pressure relief valve plate 80, which may be a spring plate, which is fixed to the high-pressure partition 6 by bolt connection or the like and can block the secondary exhaust hole 1a on the high-pressure partition 6 or the connecting member 9 under the action of its own elastic potential energy. When the pressure in the compression chamber exceeds the exhaust pressure, the pressure relief valve plate 80 overcomes the resistance of its own elastic potential energy under the action of the internal and external pressure difference and deforms to leave the high-pressure partition 6, thereby connecting the secondary exhaust hole 1a on the high-pressure partition 6 with the exhaust chamber 70, thereby connecting the compression chamber and the exhaust chamber 70, and starting to relieve pressure. When the pressure in the compression chamber is reduced to no longer exceed the exhaust pressure, the internal and external pressure difference is reduced, and the pressure relief valve plate 80 is reset under the action of its own elastic potential energy to block the secondary exhaust hole 1a again, so that the compression chamber and the exhaust chamber 70 are not connected, and the pressure relief ends.

[0097] It can be understood that this pressure relief valve has a simple structure and is easy to implement, and it uses its own elastic potential energy to achieve the purpose of blocking the auxiliary exhaust hole 1a. Of course, this pressure relief valve plate 80 can be equipped with a pressure relief valve seat 81, and there is no need to introduce components such as the return spring 83 and the pressure relief valve back plate 82.

[0098] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A scroll compressor, characterized in that: include: Static vortex disk (1); A movable scroll (2), wherein the movable scroll (2) is configured to cooperate with the fixed scroll (1) to form a compression chamber with a variable volume; A high-pressure partition (6) is arranged on the static scroll (1); A high-pressure cover plate (7) connected to the high-pressure partition plate (6) to form an exhaust chamber (70); A pressure relief valve (8) is provided on the high-pressure partition (6) and is configured to connect the compression chamber and the exhaust chamber (70) when the pressure in the compression chamber exceeds the exhaust pressure.

2. The scroll compressor according to claim 1, characterized in that: The scroll compressor comprises: A connecting piece (9), wherein the connecting piece (9) is provided with a secondary exhaust hole (1a), the secondary exhaust hole (1a) of the connecting piece (9) is in communication with the compression chamber, and the connecting piece (9) penetrates the high-pressure partition plate (6) and is in communication with the exhaust chamber (70); The pressure relief valve (8) is configured to open or close the secondary exhaust hole (1a) on the connecting member (9) based on the magnitude relationship between the pressure in the compression chamber and the exhaust pressure.

3. The scroll compressor according to claim 1, characterized in that: The pressure relief valve (8) comprises a pressure relief valve plate (80), and the pressure relief valve plate (80) is configured to open the secondary exhaust hole (1a) of the connecting piece (9) when the pressure in the compression chamber exceeds the exhaust pressure, and to close the secondary exhaust hole (1a) of the connecting piece (9) when the pressure in the compression chamber does not exceed the exhaust pressure.

4. The scroll compressor according to claim 3, characterized in that: The pressure relief valve (8) further comprises a pressure relief valve seat (81), wherein the pressure relief valve seat (81) is arranged on the high-pressure partition (6) and has a connecting hole, the auxiliary exhaust hole (1a) is connected to the exhaust chamber (70) through the connecting hole, and the pressure relief valve plate (80) is configured to open or close the connecting hole.

5. The scroll compressor according to claim 4, characterized in that: The pressure relief valve seat (81) and the high-pressure partition plate (6) are integrally formed.

6. The scroll compressor according to claim 2, characterized in that: The connecting piece (9) and the static scroll (1) are integrally formed.

7. The scroll compressor according to claim 1, characterized in that: The scroll compressor comprises: A connecting piece (9), wherein the connecting piece (9) is provided with an auxiliary exhaust hole (1a), the auxiliary exhaust hole (1a) of the connecting piece (9) is connected to the auxiliary exhaust hole (1a) on the fixed scroll (1) and the auxiliary exhaust hole (1a) on the high-pressure partition (6), the auxiliary exhaust hole (1a) on the fixed scroll (1) is connected to the compression chamber, and the auxiliary exhaust hole (1a) on the high-pressure partition (6) is connected to the exhaust chamber (70); The pressure relief valve (8) is configured to open or close the secondary exhaust hole (1a) on the high-pressure partition (6) based on the magnitude relationship between the pressure in the compression chamber and the exhaust pressure.

8. The scroll compressor according to claim 7, characterized in that: The connecting member (9) is integrally formed with the static scroll (1) or the high-pressure partition (6).

9. The scroll compressor according to any one of claims 1 to 8, characterized in that: The pressure relief valve (8) comprises a pressure relief valve back plate (82), a pressure relief valve plate (80), and a return spring (83) pre-compressed between the pressure relief valve back plate (82) and the pressure relief valve plate (80); The pressure relief valve plate (80) is configured to connect the compression chamber and the exhaust chamber (70) by overcoming the elastic force of the return spring (83) when the pressure in the compression chamber exceeds the exhaust pressure.

10. The scroll compressor according to claim 9, characterized in that: The pressure relief valve back plate (82) is further provided with a reset hole (821) connected to the exhaust chamber (70), and the reset hole (821) is configured to direct the pressure in the exhaust chamber (70) to the pressure relief valve plate (80) to reset the pressure relief valve plate (80) when the pressure in the compression chamber does not exceed the exhaust pressure.

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