Scroll compressor

Abstract

A scroll compressor, comprising a fixed scroll (1), an orbiting scroll (2), a high-pressure partition plate (6), a high-pressure cover plate (7), an exhaust valve (5), and a pressure relief valve (8). The orbiting scroll (2) is configured to cooperate with the fixed scroll (1) to form a volume-variable compression cavity; the high-pressure partition plate (6) is arranged on the fixed scroll (1); the high-pressure cover plate (7) is connected to the high-pressure partition plate (6) to form an exhaust cavity (70); the exhaust valve (5) is configured to communicate the compression cavity and the exhaust cavity (70) when the exhaust pressure of the compressor is reached; and the pressure relief valve (8) is arranged on the high-pressure partition plate (6), and is configured to communicate the compression cavity and the exhaust cavity (70) when the pressure in the compression cavity exceeds the exhaust pressure. According to the scroll compressor, the pressure relief valve (8) is arranged on the high-pressure partition plate (6), and the high pressure in the exhaust cavity (70) directly acts on the high-pressure partition plate (6) instead of directly acting on the fixed scroll (1), thereby relatively reducing the acting force on the fixed scroll (1), then reducing the risk of deformation of scroll blades of the fixed scroll (1) due to stress, and ensuring the service life, performance and reliability of the scroll compressor.

Description

scroll compressor

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202310798743.7 and invention name “Scroll Compressor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of compressors, and in particular to a scroll compressor. Background Art

[0003] 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. It can replace traditional medium and small reciprocating compressors to a large extent.

[0004] Referring to Figures 1 and 2, the typical structure of a scroll compressor comprises at least a fixed scroll 1, an orbiting scroll 2, and a compressor body 3. Both fixed scroll 1 and orbiting scroll 2 have spiral blades, and they are intermeshing and staggered 180 degrees. The orbiting scroll 2 is driven by a crankshaft 4 with a very small eccentricity. Constrained by an anti-rotation mechanism, it moves in a very small planar motion around the fixed scroll 1, thereby forming a series of crescent-shaped cylindrical working volumes in conjunction with the end plates.

[0005] 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 to the suction port 10 and is always in the suction process. The inner space is connected to 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.

[0006] Referring to Figure 3, the scroll compressor also includes an exhaust valve. The exhaust valve 5 includes an exhaust valve back plate and an exhaust valve disc. 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 disc 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 operation. During the exhaust operation, the exhaust valve disc leaves the fixed scroll 1 under the action of the internal and external pressure difference 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, the exhaust valve disc falls back and resets under the action of its own weight and / or pressure difference, and blocks the exhaust hole 11 again.

[0007] The scroll compressor also includes a high-pressure cover plate, which is fixedly connected to the stationary scroll 1 and forms an exhaust chamber. A through-hole is formed in the high-pressure cover plate. When the scroll compressor is in exhaust mode, the exhaust valve plate is pushed open until the medium exhaust hole is opened. The compressed high-temperature and high-pressure medium flows through the medium exhaust hole and the medium hole, into the exhaust chamber, and finally flows through a one-way valve on the high-pressure cover plate that connects to the exhaust chamber and into the external pipeline.

[0008] 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 detrimental to the performance and reliability of the static scroll.

[0009] In view of this, those skilled in the art need to find another way to solve the problem in existing scroll compressors where the pressure of the exhaust chamber is applied to the static scroll, causing the static scroll to deform.

[0010] Summary of the Invention

[0011] In order to solve the technical problems existing in the prior art, the present application provides a scroll compressor.

[0012] The present application provides a scroll compressor, which includes:

[0013] static vortex disk;

[0014] an orbiting scroll, the orbiting scroll being configured to cooperate with the fixed scroll to form a compression chamber with a variable volume;

[0015] a high-pressure baffle, arranged on the static vortex;

[0016] a high-pressure cover plate connected to the high-pressure partition plate to form an exhaust cavity;

[0017] The pressure relief valve is provided 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.

[0018] In one embodiment, the scroll compressor comprises:

[0019] 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 and is communicated with the exhaust chamber;

[0020] The pressure relief valve is configured to open or close the secondary exhaust hole on the connecting member based on a magnitude relationship between the pressure in the compression chamber and the exhaust pressure.

[0021] 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.

[0022] 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 communicating hole, through which the secondary exhaust hole communicates with the exhaust chamber, and the pressure relief valve plate is configured to open or close the communicating hole.

[0023] In one embodiment, the pressure relief valve seat and the high-pressure partition are integrally formed.

[0024] In one embodiment, the connecting member and the static scroll are integrally formed.

[0025] In one embodiment, the scroll compressor comprises:

[0026] a connecting member, wherein a secondary exhaust hole is formed on the connecting member, the secondary exhaust hole of the connecting member communicating with the secondary exhaust hole on the fixed scroll and the secondary exhaust hole on the high-pressure partition, the secondary exhaust hole on the fixed scroll communicating with the compression chamber, and the secondary exhaust hole on the high-pressure partition communicating with the exhaust chamber;

[0027] The pressure relief valve is configured to open or close the secondary exhaust hole on the high-pressure partition based on a magnitude relationship between the pressure in the compression chamber and the exhaust pressure.

[0028] In one embodiment, the connecting member is integrally formed with the static scroll or the high-pressure partition.

[0029] In one embodiment, the pressure relief valve includes a pressure relief valve back plate, a pressure relief valve disc, and a return spring pre-compressed between the pressure relief valve back plate and the pressure relief valve disc;

[0030] 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.

[0031] In one embodiment, the pressure relief valve back plate is further 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.

[0032] One of the beneficial effects of the scroll compressor of the present application is that the scroll compressor of the present application 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, rather than 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

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0034] FIG1 is a partial cross-sectional structural schematic diagram of a scroll compressor;

[0035] FIG2 is a schematic diagram of the structure of the movable scroll and the fixed scroll after meshing;

[0036] FIG3 is a schematic diagram of an axial cross-sectional structure of a conventional static scroll and exhaust valve assembly;

[0037] FIG4 is a schematic diagram of a partial cross-sectional structure of a scroll compressor of the present application in one embodiment;

[0038] FIG5 is a schematic diagram of a partial axial cross-sectional structure of a scroll compressor of the present application according to an embodiment;

[0039] FIG6 is a schematic diagram of a partial axial cross-sectional structure of a scroll compressor of the present application in one embodiment.

[0040] The one-to-one correspondence between the component names and figure marks in Figures 1 to 6 is as follows: 1 static scroll, 10 intake port, 11 exhaust hole, 2 orbiting 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 part, 1a auxiliary exhaust hole. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] The present application provides a scroll compressor comprising a fixed scroll, an orbiting scroll, a high-pressure partition, a high-pressure cover plate, an exhaust valve, and a pressure relief valve. The orbiting scroll is configured to cooperate with the fixed scroll to form a compression chamber with a variable volume; the high-pressure partition is disposed 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; and the pressure relief valve is disposed on the high-pressure partition and configured to connect the compression chamber and the exhaust chamber when the pressure in the compression chamber exceeds the exhaust pressure.

[0047] It should be noted that the term "medium" as used herein refers to any gas or liquid that can be compressed by a compressor, such as compressed gas or refrigerant. Furthermore, exhaust pressure refers to the pressure within the compression chamber reaching a predetermined level that allows normal exhaust to the exhaust chamber, or the pressure within the compression chamber reaching a level that pushes open the exhaust valve plate, thereby connecting the compression and exhaust chambers and allowing the scroll compressor to enter a normal exhaust stroke. Exhaust pressure can be a specific value or a range of values, depending on factors such as the scroll compressor's displacement.

[0048] 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, forming 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 blocks the medium discharge hole and the discharge channel. As the temperature and pressure of the medium in the compression chamber gradually increase, the exhaust valve opens the medium discharge hole and the discharge channel, 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 through an external pipeline to an air conditioner or other equipment that uses the compressed medium.

[0049] When the pressure in the scroll compression chamber exceeds the compressor's exhaust pressure, the pressure relief valve opens the secondary exhaust port under high pressure, automatically releasing pressure from the compression chamber to the exhaust chamber through the secondary exhaust port. The compression chamber pressure drops back to near the exhaust pressure, and the pressure relief valve then returns to its original position, closing the secondary exhaust port. This lowers the pressure ratio in the compressor, and the compressor's internal volume ratio changes accordingly to meet the compressor's operating requirements, effectively preventing over-compression in the scroll compression chamber.

[0050] In the prior art, the pressure relief valve of the scroll compressor is arranged on the static scroll, the upper part of which is located in the exhaust chamber. The pressure in the exhaust chamber directly acts on the static scroll, which can easily cause the vortex blades of the static scroll to deform, thereby affecting the performance of the static scroll.

[0051] In comparison, the scroll compressor of the present application 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 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.

[0052] For ease of understanding, the specific structure and working principle of the scroll compressor of the present application will be described in detail below in combination with specific embodiments with reference to FIG. 4 to FIG. 6 .

[0053] 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 .

[0054] The body 3 is generally 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 .

[0055] Both the fixed scroll 1 and the orbiting scroll 2 feature vortex-shaped blades, meshing with each other at an angle of 180°. Driven by a crankshaft with a very small eccentricity and restrained by an anti-rotation mechanism, the orbiting scroll 2 moves in a very small planar motion around the fixed scroll 1, thereby forming a series of crescent-shaped cylindrical working volumes in conjunction with the end plates.

[0056] It should be noted that, as to the specific structures of the static scroll 1 , the movable scroll 2 and the body 3 and their mutual assembly relationship, those skilled in the art may adopt existing technologies, which will not be elaborated herein.

[0057] Continuing with FIG4 , in this embodiment, the high-pressure partition 6 is fixedly connected to the static scroll 1, typically by welding. Of course, the two can also be fixedly connected by screw fasteners, riveting, or bonding, provided that processing and assembly requirements are met.

[0058] A connecting hole is provided on the high-pressure partition 6, which is connected to the medium discharge hole of the static vortex 1, and the two are basically coaxial and have the same radius. This can avoid the pressure generated 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 1 falling off.

[0059] 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. 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.

[0060] 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.

[0061] The high-pressure cover plate 7 is provided with an exhaust port connected to the exhaust chamber 70, and the exhaust port is connected to an external pipeline. Usually, an exhaust one-way valve (not shown in the figure) is also installed on the external pipeline. The exhaust one-way 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 what is commonly known as "refrigerant migration".

[0062] The exhaust valve 5 is mounted on the outer surface of the high-pressure partition 6 and is located within the exhaust chamber 70. It should be noted that the terms "inside" and "outside" used herein are relative to the compression chamber. On a scroll compressor, the side closest to the compression chamber is considered "inside," while the side further from the compression chamber is considered "outside." The exhaust valve 5 is configured to connect the compression chamber and the exhaust chamber when the compressor discharge pressure is reached.

[0063] The pressure relief valve 8 is provided 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.

[0064] With this arrangement, when the pressure in the scroll compression chamber exceeds the compressor discharge pressure, pressure relief valve 8, under the action of the high pressure, opens secondary exhaust port 1a, automatically releasing pressure from the compression chamber to exhaust chamber 70 through secondary exhaust port 1a. The compression chamber pressure then drops back to near the discharge pressure, after which pressure relief valve 8 returns to its original position and closes secondary exhaust port 1a. This lowers the pressure ratio within the compressor, and the compressor's internal volume ratio accordingly adjusts to meet compressor operating requirements, effectively preventing over-compression within the scroll compression chamber.

[0065] In the prior art, the pressure relief valve 8 of the scroll compressor is arranged on the static scroll 1, and 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.

[0066] In comparison, the scroll compressor of the present application sets the pressure relief valve 8 on the high-pressure partition 6, and 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.

[0067] In detail, in one embodiment, in combination with Figures 4 and 5, the scroll compressor includes a connector 9, which is provided with a secondary exhaust hole 1a. The secondary exhaust hole 1a 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.

[0068] 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 relationship between the pressure in the compression chamber and the exhaust pressure.

[0069] With this arrangement, there is no need to process the secondary exhaust hole 1a on the high-pressure partition 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.

[0070] 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 so that it passes 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.

[0071] Of course, the connecting part 9 and the static scroll 1 of the scroll compressor of the present application are processed relatively independently, and the secondary exhaust holes 1a are processed on each other, and then the two are assembled together by welding, bonding, bolting, etc., and the secondary exhaust holes 1a of the two are connected, and it is best to make the secondary exhaust holes 1a of the two coaxially arranged.

[0072] Compared with this structure, the connector 9 and the static scroll 1 of the scroll compressor of the present application 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 connector 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.

[0073] Continuing with FIG5 , in one embodiment, the pressure relief valve 8 of the present application includes a pressure relief valve disc 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 mounted on the high-pressure partition 6 by welding, threading, bonding, or the like and has a connecting hole. The secondary exhaust hole 1a on the connector 9 is connected to the exhaust chamber 70 via 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 disc 80.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] In one embodiment, the pressure relief valve seat 81 can be integrally formed with the high-pressure partition 6 .

[0078] Such an arrangement can reduce the number of components involved in the scroll compressor of the present application, and lower the difficulty of processing and assembly process.

[0079] 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 secondary 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 secondary exhaust hole 1a on the connecting piece 9, so that the compression chamber and the exhaust chamber 70 are connected through the secondary exhaust hole 1a, and the scroll compressor starts to relieve pressure.

[0080] Referring to Figure 6, in one embodiment, the scroll compressor includes a connecting member 9, which is provided with an auxiliary exhaust hole 1a. The auxiliary exhaust hole 1a on the connecting member 9 is connected to the auxiliary exhaust hole 1a on the static scroll 1 and the auxiliary exhaust hole 1a on the high-pressure partition 6. The auxiliary exhaust hole 1a on the static 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.

[0081] The pressure relief valve 8 is configured to open or close the secondary exhaust hole 1 a on the high-pressure partition 6 based on the relationship between the pressure in the compression chamber and the exhaust pressure.

[0082] 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 pressure relief. When the pressure in the compression chamber does not exceed the exhaust pressure, the pressure relief valve closes the auxiliary exhaust hole 1a on the high-pressure partition 6 and the pressure relief ends.

[0083] It should be noted that, in this embodiment, the connecting member 9, the static scroll 1 and the high-pressure partition 6 are independently processed and then assembled, and the auxiliary exhaust holes 1a on the three are connected.

[0084] It can be understood that the connecting member 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 application, thereby reducing the difficulty of processing and assembly.

[0085] Continuing to refer to Figure 6, in this embodiment, the pressure relief valve 8 of the present application includes a pressure relief valve disc 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 6 by welding, threaded connection, bonding, etc. and has a connecting hole, and the secondary exhaust hole 1a on the high-pressure partition 6 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, and the return spring 83 is pre-tightened between the pressure relief valve back plate 82 and the pressure relief valve disc 80. The pressure relief valve disc 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.

[0086] 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.

[0087] 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.

[0088] In one embodiment, the pressure relief valve seat 81 may be integrally formed with the high-pressure partition 6 , as shown in the structure in FIG. 4 .

[0089] Such an arrangement can reduce the number of components involved in the scroll compressor of the present application, and lower the difficulty of processing and assembly process.

[0090] 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 secondary 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 secondary exhaust hole 1a on the high-pressure partition 6, so that the compression chamber and the exhaust chamber 70 are connected through the secondary exhaust hole 1a, and the scroll compressor starts to relieve pressure until the pressure in the compression chamber does not exceed the exhaust pressure, at which time the pressure relief valve plate 80 closes the secondary exhaust hole 1a on the high-pressure partition 6, and the pressure relief ends.

[0091] Furthermore, in order to ensure that the pressure relief valve disc 80 can be smoothly reset, referring to Figure 6, the pressure relief valve back plate 82 of the present application 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 disc 80 when the pressure in the compression chamber does not exceed the exhaust pressure to reset the pressure relief valve disc 80.

[0092] That is to say, in this embodiment, the pressure relief valve plate 80 can achieve the purpose of reset by means of the dual action of the reset spring 83 and the air pressure introduced from the reset hole 821 .

[0093] Such a setting can avoid the problem that the return spring 83 fails or the pressure relief valve plate 80 cannot be reset due to 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, suction and other working strokes, thereby ensuring the normal and safe operation of the compressor.

[0094] 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, causing it to reset quickly.

[0095] Moreover, in order to release the pressure in the compression chamber to the exhaust chamber 70 under the pressure relief condition, in this embodiment, the pressure relief exhaust hole 820 of the pressure relief valve back plate 82 is set 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.

[0096] 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 the embodiment shown in FIG5 . Those skilled in the art can fully understand and implement this solution based on the above description, and no further details will be given herein.

[0097] Of course, in the embodiments shown in Figures 5 and 6, the pressure relief valve 8 of the present application may only include a pressure relief valve plate 80, which may be a spring, which is fixed to the high-pressure partition 6 by means of bolt connection or the like and can block the secondary exhaust hole 1a on the high-pressure partition 6 or the connector 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 away from the high-pressure partition 6, thereby connecting the secondary exhaust hole 1a on the high-pressure partition 6 with the exhaust chamber 70, and then connecting the compression chamber and the exhaust chamber 70, and starting to relieve pressure. When the pressure in the compression chamber drops to a level that no longer exceeds the exhaust pressure, the internal and external pressure difference decreases, and the pressure relief valve plate 80 resets under the action of its own elastic potential energy and blocks the secondary exhaust hole 1a again. The compression chamber and the exhaust chamber 70 are not connected, and the pressure relief ends.

[0098] It is 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.

[0099] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of this application 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 2, 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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