CN220378486U - Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a - Google Patents

Abstract

The present disclosure relates to a scroll compressor including a fixed scroll, an orbiting scroll, a high pressure separator, a high pressure cover plate, an exhaust valve, and a pressure relief valve. Wherein, the movable vortex disk is configured to form a compression cavity with variable volume in cooperation with the fixed vortex disk; the high-pressure baffle plate is arranged on the fixed scroll; the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity; a discharge valve configured to communicate the compression chamber and the discharge chamber upon reaching a compressor discharge pressure; a relief valve is disposed on the high pressure diaphragm and is configured to communicate the compression chamber with the discharge chamber when the pressure in the compression chamber exceeds the discharge pressure. The scroll compressor of this disclosure sets up the relief valve on high-pressure baffle, and the high pressure direct action of exhaust intracavity is on high-pressure baffle, and not direct action is at quiet vortex dish to relative reduction to the effort of quiet vortex dish, reduced the risk that the vortex blade atress of quiet vortex dish warp then, guaranteed its life, performance and reliability.

Description

Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Technical Field

The present disclosure relates to the field of compressors, and in particular, to a scroll compressor.

Background

The scroll compressor is a typical structure of a compressor, is mainly used for air conditioning, refrigeration, general gas compression, automobile engine superchargers, vacuum pumps and other occasions, and can replace the traditional middle-and small-sized reciprocating compressors in a large range.

Referring to fig. 1 and 2, a typical structure of a scroll compressor includes at least a fixed scroll 1, an orbiting scroll 2, and a body 3. Wherein, the fixed scroll 1 and the movable scroll 2 are provided with scroll blades which are mutually meshed in 180-degree staggered opposite directions. The movable vortex disk 2 is driven by a crankshaft 4 with small eccentric distance and restrained by an anti-rotation mechanism, and moves around the fixed vortex disk 1 in a plane with small radius, so that a series of crescent cylinder working volumes are formed by the cooperation of the movable vortex disk and the end plate.

The scroll compressor simultaneously performs three working processes of air suction, compression and air discharge in the period of one revolution of the crankshaft 4, the outer space is communicated with the air suction port 10 and is always in the air suction process, the inner space is communicated with the air discharge hole 11 and is always in the air discharge process, and the air discharge hole 11 faces the axial direction of the fixed scroll 1.

Referring to fig. 3, the scroll compressor further includes an exhaust valve. The exhaust valve 5 comprises 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 through screws, an axial gap is reserved between the exhaust valve back plate and the exhaust hole 11, the exhaust valve plate is positioned in the axial gap and is used for sealing the exhaust hole 11 under the action of internal and external pressure differences in the process of air suction and compression, the exhaust valve plate is separated from the fixed scroll 1 under the action of the internal and external pressure differences in the process of air exhaust, the exhaust hole 11 is stopped by the exhaust valve back plate, at the moment, the exhaust hole 11 is opened, compressed high-temperature 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 plate falls back under the action of dead weight and/or pressure difference to reset, and the exhaust hole 11 is sealed again.

The vortex compressor also comprises a high-pressure cover plate which is fixedly connected to the fixed vortex disk 1 and fixedly connected with the fixed vortex disk to form an exhaust cavity. The high-pressure cover plate is provided with a through hole. When the vortex compressor is in the exhaust working condition, the exhaust valve plate is pushed open until the medium exhaust hole is opened, the high-temperature and high-pressure medium after compression treatment sequentially flows through the medium exhaust hole and the medium hole into the exhaust cavity, and finally flows into an external pipeline from the one-way valve arranged on the high-pressure cover plate and communicated with the exhaust cavity.

The higher the acting force, the larger the deformation of the vortex blade of the fixed vortex disk 1, the more adverse the performance and reliability of the fixed vortex disk.

In view of this, those skilled in the art need to develop a new way to solve the problem of deformation of the fixed scroll caused by the application of the pressure of the exhaust chamber to the fixed scroll in the existing scroll compressor.

Disclosure of Invention

The present disclosure provides a scroll compressor for solving the technical problems existing in the prior art.

The present disclosure provides a scroll compressor, the scroll compressor of the present disclosure comprising:

a fixed scroll;

an orbiting scroll configured to cooperate with the fixed scroll to form a variable volume compression chamber;

the high-pressure baffle is arranged on the fixed scroll;

the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity;

and a pressure release valve arranged on the high-pressure partition plate and configured to communicate the compression chamber with the discharge chamber when the pressure in the compression chamber exceeds the discharge pressure.

In one embodiment, the scroll compressor includes:

the connecting piece is provided with an auxiliary exhaust hole, the auxiliary exhaust hole of the connecting piece is communicated with the compression cavity, and the connecting piece penetrates through the high-pressure partition plate to be communicated with the exhaust cavity;

the pressure relief valve is configured to open or close a secondary vent on the connector based on a magnitude relationship of pressure in the compression chamber and discharge pressure.

In one embodiment, the relief valve includes a relief valve plate, and the relief valve plate is configured to open the secondary vent of the connector when the pressure in the compression chamber exceeds the discharge pressure and to close the secondary vent of the connector when the pressure in the compression chamber does not exceed the discharge pressure.

In one embodiment, the relief valve further includes a relief valve seat provided on the high-pressure separator and having a communication hole through which the auxiliary exhaust hole communicates with the exhaust chamber, and the relief valve plate is configured to open or close the communication hole.

In one embodiment, the relief valve seat and the high pressure diaphragm are integrally formed.

In one embodiment, the connecting piece and the fixed scroll are integrally formed.

In one embodiment, the scroll compressor includes:

the connecting piece is provided with an auxiliary exhaust hole, the auxiliary exhaust hole of the connecting piece is communicated with the auxiliary exhaust hole on the static vortex plate and the auxiliary exhaust hole on the high-pressure partition plate, the auxiliary exhaust hole on the static vortex plate is communicated with the compression cavity, and the auxiliary exhaust hole on the high-pressure partition plate is communicated with the exhaust cavity;

the relief valve is configured to open or close a secondary vent on the high pressure diaphragm based on a magnitude relationship of pressure in the compression chamber and discharge pressure.

In one embodiment, the connecting piece is integrally formed with the fixed scroll or the high-pressure separator.

In one embodiment, the relief valve comprises a relief valve backplate, a relief valve plate, and a return spring pre-compressed between the relief valve backplate and the relief valve plate;

the relief valve plate is configured to communicate the compression chamber and the discharge chamber against an elastic force of the return spring when the pressure in the compression chamber exceeds a discharge pressure.

In one embodiment, the relief valve backplate is further provided with a reset orifice in communication with the discharge chamber, and the reset orifice is configured to direct pressure within the discharge chamber onto the relief valve plate to reset the relief valve plate when the pressure within the compression chamber does not exceed the discharge pressure.

One of the beneficial effects of the scroll compressor of the present disclosure is: the scroll compressor of this disclosure sets up the relief valve on high-pressure baffle, and the high pressure direct action of exhaust intracavity is on high-pressure baffle, and not direct action is at quiet vortex dish to relative reduction to the effort of quiet vortex dish, reduced the risk that the vortex blade atress of quiet vortex dish warp then, guaranteed its life, performance and reliability.

Drawings

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

FIG. 1 is a schematic view of a partial cross-sectional configuration of a scroll compressor;

FIG. 2 is a schematic view of the structure of the orbiting scroll after engagement with the fixed scroll;

FIG. 3 is a schematic axial cross-sectional view of a prior art fixed scroll and exhaust valve assembly;

FIG. 4 is a schematic view of a partial cross-sectional configuration of a scroll compressor of the present disclosure in one embodiment;

FIG. 5 is a schematic view of a partial axial cross-sectional structure of a scroll compressor of the present disclosure in one embodiment;

FIG. 6 is a schematic view of a partial axial cross-sectional structure of a scroll compressor of the present disclosure in one embodiment.

The one-to-one correspondence between the component names and the reference numerals in fig. 1 to 6 is as follows:

the device comprises a fixed scroll, a 10 air suction port, an 11 exhaust hole, a 2 movable scroll, a 3 machine body, a 4 crankshaft, a 5 exhaust valve, a 6 high-pressure partition plate, a 7 high-pressure cover plate, a 70 exhaust cavity, an 8 pressure relief valve, an 80 pressure relief valve plate, an 81 pressure relief valve seat, an 82 pressure relief valve backboard, an 820 pressure relief exhaust hole, an 821 reset hole, an 83 reset spring, a 9 connecting piece and a 1a auxiliary exhaust hole.

Detailed Description

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 the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.

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

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The present disclosure provides a scroll compressor including a fixed scroll, a movable scroll, a high pressure separator, a high pressure cover plate, an exhaust valve, and a pressure relief valve. Wherein, the movable vortex disk is configured to form a compression cavity with variable volume in cooperation with the fixed vortex disk; the high-pressure baffle plate is arranged on the fixed scroll; the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity; a discharge valve configured to communicate the compression chamber and the discharge chamber upon reaching a compressor discharge pressure; a relief valve is disposed on the high pressure diaphragm and is configured to communicate the compression chamber with the discharge chamber when the pressure in the compression chamber exceeds the discharge pressure.

The term "medium" as used herein refers to a gas or liquid or the like that is compressed by a compressor, such as compressed gas or refrigerant. In addition, the discharge pressure means that the pressure in the compression cavity reaches the set pressure which allows normal discharge to the discharge cavity, or the pressure in the compression cavity reaches the discharge valve plate which can push the discharge valve away, so that the discharge valve is communicated with the compression cavity and the discharge cavity, and the scroll compressor is in a normal discharge stroke state. The discharge pressure may be a specific value or a range of values depending on factors such as the displacement of the scroll compressor.

The working principle of the scroll compressor is as follows: the dynamic vortex plate rotates eccentrically, the volume of the side of a medium suction hole of a compression cavity formed by meshing the dynamic vortex plate and the static vortex plate increases with the pressure difference outside the compression cavity, medium to be compressed is sucked into the compression cavity through the medium suction hole, the volume of the compression cavity where the medium is located is not gradually reduced along with the continuous rotation of the dynamic vortex plate, the medium is compressed, an exhaust valve always enables a medium discharge hole and a discharge channel to be blocked under the suction and compression conditions, the temperature and the pressure of the medium in the compression cavity are gradually increased, the exhaust valve enables the medium discharge hole and the discharge channel to be conducted, high-temperature and high-pressure medium is discharged from the compression cavity through the medium discharge hole and is discharged into the discharge cavity through the discharge channel, and finally the medium is input into equipment using the compressed medium such as an air conditioner through an external pipeline.

When the pressure in the vortex compression cavity exceeds the discharge pressure of the compressor, the pressure relief valve opens the auxiliary exhaust hole under the action of high pressure, the compression cavity automatically relieves pressure to the discharge cavity through the auxiliary exhaust hole, the pressure of the compression cavity is reduced back to the vicinity of the discharge pressure, and then the pressure relief valve is restored to be original state to close the auxiliary exhaust hole. The internal pressure ratio of the compressor is reduced, the internal volume ratio of the compressor is changed along with the reduction to meet the running requirement of the compressor, and the over-compression in the vortex compression cavity is effectively prevented.

In the prior art, a pressure relief valve of a vortex compressor is arranged on a static vortex disc, the upper part of the static vortex disc is positioned in a gas exhaust cavity, and the pressure in the gas exhaust cavity directly acts on the static vortex disc to easily cause the vortex blade of the static vortex disc to deform, so that the performance of the static vortex disc is affected.

Compared with the prior art, the scroll compressor has the advantages that the pressure release valve is arranged on the high-pressure partition plate, the high pressure in the exhaust cavity directly acts on the high-pressure partition plate instead of directly acting on the fixed scroll, so that acting force on the fixed scroll is relatively reduced, the risk of stress deformation of the scroll blades of the fixed scroll is reduced, and the service life, performance and reliability of the scroll compressor are guaranteed.

For ease of understanding, the specific structure of the scroll compressor of the present disclosure and its operating principle will be described in detail with reference to fig. 4 to 6 in conjunction with specific embodiments.

Referring to fig. 4, in the present embodiment, the scroll compressor includes a fixed scroll 1, an orbiting scroll 2, a body 3, an exhaust valve 5, a high pressure separator 6, and a high pressure cover 7.

The machine body 3 is generally a thin-walled shell structure, and the space inside the machine body is enough to accommodate the fixed scroll 1, the movable scroll 2 and a driving mechanism for driving the movable scroll 2 to rotate around the fixed scroll 1.

The fixed scroll 1 and the movable scroll 2 are provided with scroll blades, and are mutually meshed in 180-degree staggered opposition. The movable vortex disk 2 is driven by a crankshaft with small eccentric distance and restrained by an anti-rotation mechanism, and moves around the fixed vortex disk 1 in a plane with small radius, so that a series of crescent cylinder working volumes are formed by the cooperation of the movable vortex disk and the end plate.

It should be noted that, the specific structures and the mutual assembly relationships of the fixed scroll 1, the movable scroll 2 and the machine body 3 may be adopted by those skilled in the art, and are not described herein again.

With continued reference to fig. 4, in this embodiment, the high-pressure separator 6 is fixedly connected to the fixed scroll 1, and typically, both are welded. Of course, on the basis of meeting the requirements of processing and assembly processes, the two can be fixedly connected through a fastener of a screw, and can also be fixedly connected in a riveting or bonding mode.

The high-pressure partition plate 6 is provided with a communication hole, the communication hole is communicated with the medium discharge hole of the fixed scroll 1, and basically the communication hole and the medium discharge hole are coaxial and have the same radius, so that the risk that the joint of the high-pressure partition plate 6 and the fixed scroll 1 falls off due to the pressure generated by the high-temperature high-pressure medium when discharged from the compression cavity can be avoided.

The sealing ring groove surrounding the medium discharge hole is formed in the matching surface of the fixed vortex disk 1 and the high-pressure partition plate 6, and an elastic sealing ring is arranged in the sealing ring groove in an internal pressure mode so as to realize static sealing between the fixed vortex disk 1 and the high-pressure partition plate 6, and therefore leakage of compressed high-temperature and high-pressure medium from the matching surface of the fixed vortex disk 1 and the high-pressure partition plate 6 is prevented.

The high-pressure cover plate 7 and the high-pressure separator 6 are fixedly connected by welding, bonding, or fastening using screws or the like to form the exhaust chamber 70.

The high-pressure cover plate 7 is provided with a discharge port communicating with the discharge chamber 70, and an external pipe is connected to the discharge port, and a discharge check valve (not shown) is usually installed on the external pipe, and the discharge check valve is used for preventing a refrigeration circuit in a device pipe of an air conditioner from flowing into the scroll compressor, so-called "refrigerant migration".

The exhaust valve 5 is provided on the outer plate surface of the high-pressure separator 6 and is located in the exhaust chamber 70. The terms "inner" and "outer" as used herein are defined with reference to the compression chamber, and the side of the scroll compressor closer to the compression chamber is the inner side and the side farther from the compression chamber is the outer side. The discharge valve 5 is configured to communicate the compression chamber and the discharge chamber when the discharge pressure of the compressor is reached.

A relief valve 8 is provided on the high pressure diaphragm 6 and is configured to communicate the compression chamber with the discharge chamber 70 when the pressure in the compression chamber exceeds the discharge pressure.

So set up, when the pressure in the scroll compression chamber exceeds compressor discharge pressure, the relief valve 8 opens auxiliary vent 1a under the high pressure effect, and the compression chamber is through auxiliary vent 1a automatic pressure release to the vent 70, and compression chamber pressure drops back to near the discharge pressure, and then the relief valve 8 resumes the original state and closes auxiliary vent 1a. The internal pressure ratio of the compressor is reduced, the internal volume ratio of the compressor is changed along with the reduction to meet the running requirement of the compressor, and the over-compression in the vortex compression cavity is effectively prevented.

In the prior art, a pressure release valve 8 of a scroll compressor is arranged on a fixed scroll 1, the upper part of the fixed scroll 1 is arranged in a gas discharge cavity 70, and the pressure in the gas discharge cavity 70 directly acts on the fixed scroll 1, so that the deformation of scroll blades of the fixed scroll 1 is easily caused, and the performance of the fixed scroll 1 is affected.

Compared with the prior art, the scroll compressor has the advantages that the pressure release valve 8 is arranged on the high-pressure partition plate 6, 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, so that acting force on the fixed scroll 1 is relatively reduced, the risk of stress deformation of the scroll blades of the fixed scroll 1 is reduced, and the service life, performance and reliability of the scroll compressor are guaranteed.

In detail, in one embodiment, referring to fig. 4 and 5, the scroll compressor includes a connection member 9, a sub-discharge hole 1a is formed in the connection member 9, the sub-discharge hole 1a of the connection member 9 communicates with the compression chamber, and the connection member 9 communicates with the discharge chamber 70 through the high pressure barrier 6.

The relief valve 8 is configured to open or close the sub-discharge hole 1a on the connecting member 9 based on the magnitude relation of the pressure in the compression chamber and the discharge pressure.

By the arrangement, the auxiliary exhaust hole 1a is not required to be machined on the high-pressure partition plate 6, only a through hole through which the connecting piece 9 can penetrate is required to be machined, and the size of the through hole is generally larger than that of the auxiliary exhaust hole 1a, so that the machining difficulty of the high-pressure cover plate 7 is reduced.

In one embodiment, the connection member 9 may be integrally formed with the fixed scroll 1, that is, a cylindrical structure is formed on the fixed scroll 1 to penetrate the high-pressure separator 6, and the auxiliary exhaust hole 1a is formed on the integrally formed structure of the connection member 9 and the fixed scroll 1 to communicate the compression chamber and the exhaust chamber 70.

Of course, the connecting piece 9 of the scroll compressor of the present disclosure and the fixed scroll 1 are processed relatively independently, and the auxiliary exhaust holes 1a are processed on each other, and then the two are assembled together by means of welding, bonding, bolting, etc., and the auxiliary exhaust holes 1a of the two are communicated, preferably coaxially arranged in the auxiliary exhaust holes 1a of the two.

Compared with the structure, the connecting piece 9 and the fixed scroll 1 of the scroll compressor are integrally formed, so that the number of components in the scroll compressor can be reduced, the auxiliary exhaust hole 1a is directly integrally formed on the connecting piece 9 and the fixed scroll 1, the step of independently processing and assembling is omitted, and the processing and assembling difficulty of the whole structure can be reduced.

With continued reference to fig. 5, in one embodiment, the relief valve 8 of the present disclosure includes a relief valve plate 80, a relief valve seat 81, a relief valve back plate 82, and a return spring 83. The pressure relief valve seat 81 is disposed on the high-pressure partition plate 6 by welding, threaded connection, bonding, and the like, and has a communication hole, the auxiliary exhaust hole 1a on the connecting piece 9 is communicated with the exhaust cavity 70 through the communication 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-compressed between the pressure relief valve back plate 82 and the pressure relief valve plate 80.

The relief valve plate 80 is configured to communicate the compression chamber and the discharge chamber 70 against the elastic force of the return spring 83 when the pressure in the compression chamber exceeds the discharge pressure to discharge the gas in the compression chamber into the discharge valve 5 until the pressure in the compression chamber is reduced to the discharge pressure or less.

That is, when the pressure in the compression chamber exceeds the discharge pressure, the relief valve plate 80 closes the communication hole in the relief valve seat 81 by the elastic force of the return spring 83, that is, closes the discharge path communicating the compression chamber and the discharge chamber 70 through the sub-discharge hole 1a.

In one embodiment, the return spring 83 may be a compression spring, or may be an elastic member, such as a rubber member, that stores elastic potential energy after compression.

In one embodiment, the relief valve seat 81 may be integrally formed with the high pressure diaphragm 6.

By the arrangement, the number of parts involved in the scroll compressor can be reduced, and the processing difficulty is reduced to realize an assembly process.

That is, the relief valve back plate 82 may be directly and fixedly connected to the high pressure separator 6, and in the case that the pressure in the compression chamber does not exceed the discharge pressure, the relief valve plate 80 is pressed against the auxiliary discharge hole 1a of the connecting member 9 by the return spring 83, and when the pressure in the compression chamber exceeds the discharge pressure, the relief valve plate 80 overcomes the elastic force of the return spring 83 to open the auxiliary discharge hole 1a of the connecting member 9 under the action of the internal and external pressure difference, so that the compression chamber and the discharge chamber 70 are communicated through the auxiliary discharge hole 1a, and the scroll compressor starts to relieve pressure.

Referring to fig. 6, in one embodiment, the scroll compressor includes a connecting member 9, a secondary exhaust hole 1a is formed in the connecting member 9, the secondary exhaust hole 1a on the connecting member 9 communicates with the secondary exhaust hole 1a on the fixed scroll 1 and the secondary exhaust hole 1a on the high-pressure separator 6, the secondary exhaust hole 1a on the fixed scroll 1 communicates with the compression chamber, and the secondary exhaust hole 1a on the high-pressure separator 6 communicates with the exhaust chamber 70.

The relief valve 8 is configured to open or close the sub-discharge hole 1a in the high-pressure separator 6 based on the magnitude relation of the pressure in the compression chamber and the discharge pressure.

That is, when the pressure in the compression chamber exceeds the discharge pressure, the pressure release valve 8 opens the auxiliary vent hole 1a on the high-pressure separator 6, that is, the compression chamber and the discharge chamber 70 are communicated through the auxiliary vent hole 1a on the fixed scroll 1, the auxiliary vent hole 1a on the connecting piece 9, and the auxiliary vent hole 1a on the high-pressure separator 6, which are sequentially communicated, so as to rapidly discharge the pressure in the compression chamber into the discharge chamber 70, and start to release the pressure, until the pressure in the compression chamber does not exceed the discharge pressure, the pressure release valve closes the auxiliary vent hole 1a on the high-pressure separator 6, and the pressure release is ended.

In the present embodiment, the connecting member 9, the fixed scroll 1, and the high-pressure separator 6 are independently processed and then formed, and the auxiliary exhaust holes 1a of the three parts are communicated.

It will be appreciated that the connector 9 may be integrally formed with the high pressure separator 6 to reduce the number of components involved in the scroll compressor of the present disclosure, thereby reducing machining and assembly difficulties.

With continued reference to fig. 6, in this embodiment, the relief valve 8 of the present disclosure includes a relief valve plate 80, a relief valve seat 81, a relief valve back plate 82, and a return spring 83, where the relief valve seat 81 is disposed on the high-pressure partition plate 6 by welding, screwing, bonding, or the like and has a communication hole, the auxiliary exhaust hole 1a on the high-pressure partition plate 6 is communicated with the exhaust chamber 70 through the communication hole, the relief valve back plate 82 is fixedly connected to the relief valve seat 81, the return spring 83 is pre-compressed between the relief valve back plate 82 and the relief valve plate 80, and the relief valve plate 80 is configured to communicate the compression chamber with the exhaust chamber 70 against the elastic force of the return spring 83 when the pressure in the compression chamber exceeds the exhaust pressure, so as to exhaust 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.

That is, when the pressure in the compression chamber exceeds the discharge pressure, the relief valve plate 80 closes the communication hole in the relief valve seat 81 by the elastic force of the return spring 83, that is, closes the discharge path communicating the compression chamber and the discharge chamber 70 through the sub-discharge hole 1a.

In one embodiment, the return spring 83 may be a compression spring, or may be an elastic member, such as a rubber member, that stores elastic potential energy after compression.

In one embodiment, the relief valve seat 81 may be integrally formed with the high pressure diaphragm 6, see the structure shown in FIG. 4.

By the arrangement, the number of parts involved in the scroll compressor can be reduced, and the processing difficulty is reduced to realize an assembly process.

That is, the relief valve back plate 82 may be directly and fixedly connected to the high pressure partition plate 6, and in the case that the pressure in the compression chamber does not exceed the discharge pressure, the relief valve plate 80 is pressed against the auxiliary discharge hole 1a on the high pressure partition plate 6 by the return spring 83, when the pressure in the compression chamber exceeds the discharge pressure, the relief valve plate 80 overcomes the elastic force of the return spring 83 to open the auxiliary discharge hole 1a on the high pressure partition plate 6 under the action of the internal and external pressure difference, so that the compression chamber and the discharge chamber 70 are communicated through the auxiliary discharge hole 1a, the scroll compressor starts to relieve pressure, until the pressure in the compression chamber does not exceed the discharge pressure, the relief valve plate 80 closes the auxiliary discharge hole 1a on the high pressure partition plate 6, and the relief is ended.

Further, to ensure that the relief valve plate 80 can be smoothly reset, with continued reference to fig. 6, a reset hole 821 in communication with the exhaust chamber 70 is further provided on the relief valve back plate 82 of the present disclosure, and the reset hole 821 is configured to guide the pressure in the exhaust chamber 70 onto the relief valve plate 80 to reset the relief valve plate 80 when the pressure in the compression chamber does not exceed the exhaust pressure.

That is, in this embodiment, the relief valve plate 80 can achieve the purpose of resetting by the double action of the return spring 83 and the air pressure introduced from the return hole 821.

By the arrangement, the problem that the reset spring 83 fails or cannot reset due to the fact that the pressure relief valve plate 80 is clamped on the pressure relief valve back plate 82 can be avoided, and therefore the problem that air flow in the exhaust cavity 70 flows backwards into the compression cavity when the scroll compressor is in working strokes of compression, air suction and the like is avoided, and normal and safe operation of the compressor can be guaranteed.

In detail, in this embodiment, the reset hole 821 is disposed on a side surface of the relief valve back plate 82 opposite to the relief valve plate 80, that is, on a top plate of the relief valve back plate 82, so that the relief valve plate 80 is quickly reset under the full action of the air pressure introduced by the free exhaust chamber 70.

In order to release the pressure in the compression chamber to the discharge chamber 70 under the pressure relief condition, in this embodiment, the pressure relief vent hole 820 of the pressure relief valve back plate 82 is provided 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.

It should be noted that, in the present embodiment, the scheme of providing the reset hole 821 on the back plate 82 of the relief valve is also applicable to the embodiment shown in fig. 5, and those skilled in the art can fully understand and implement the embodiment based on the above description, and the details are not repeated here.

Of course, in the embodiment shown in fig. 5 and 6, the pressure release valve 8 of the present disclosure may only include the pressure release valve plate 80, the pressure release valve plate 80 may be a spring plate, which is fixed on the high-pressure partition plate 6 by a bolt connection or the like and can seal the auxiliary exhaust hole 1a on the high-pressure partition plate 6 or the connecting piece 9 under the action of self elastic potential energy, when the pressure in the compression cavity exceeds the exhaust pressure, the pressure release valve plate 80 overcomes the resistance of the self elastic potential energy under the action of internal and external pressure differences to deform and leave the high-pressure partition plate 6, so that the auxiliary exhaust hole 1a on the high-pressure partition plate 6 is communicated with the exhaust cavity 70, and the compression cavity is communicated with the exhaust cavity 70, so as to start pressure release, when the pressure in the compression cavity is reduced to no longer exceed the exhaust pressure, the internal and external pressure differences are reduced, the pressure release valve plate 80 resets under the action of self elastic potential energy to seal the auxiliary exhaust hole 1a again, the compression cavity is not communicated with the exhaust cavity 70, and the pressure release is ended.

It can be understood that the pressure relief valve has a simple structure and is convenient to realize, and the purpose of plugging the auxiliary exhaust hole 1a is realized by means of self elastic potential energy. Of course, such a relief valve plate 80 may be provided with a relief valve seat 81, when there is no need to introduce a return spring 83, a relief valve back plate 82, and the like.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others 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 (10)

1. A scroll compressor, comprising:

a fixed scroll (1);

-an orbiting scroll (2), the orbiting scroll (2) being configured to cooperate with the fixed scroll (1) to form a variable volume compression chamber;

a high-pressure separator (6) arranged on the fixed scroll (1);

a high-pressure cover plate (7) connected with the high-pressure partition plate (6) to form an exhaust cavity (70);

a relief valve (8) is provided on the high pressure diaphragm (6) and configured to communicate the compression chamber with the discharge chamber (70) when the pressure in the compression chamber exceeds the discharge pressure.

2. The scroll compressor of claim 1, wherein the scroll compressor comprises:

the connecting piece (9), the auxiliary exhaust hole (1 a) is formed in the connecting piece (9), the auxiliary exhaust hole (1 a) of the connecting piece (9) is communicated with the compression cavity, and the connecting piece (9) penetrates through the high-pressure partition plate (6) to be communicated with the exhaust cavity (70);

the pressure relief valve (8) is configured to open or close the secondary vent hole (1 a) on the connection member (9) based on the magnitude relation of the pressure in the compression chamber and the discharge pressure.

3. A scroll compressor according to claim 2, wherein the relief valve (8) comprises a relief valve plate (80), and wherein the relief valve plate (80) is configured to open the secondary vent (1 a) of the connection member (9) when the pressure in the compression chamber exceeds the discharge pressure, and to close the secondary vent (1 a) of the connection member (9) when the pressure in the compression chamber does not exceed the discharge pressure.

4. A scroll compressor according to claim 3, wherein the relief valve (8) further comprises a relief valve seat (81), the relief valve seat (81) being provided on the high pressure separator (6) and having a communication hole through which the auxiliary exhaust hole (1 a) communicates with the exhaust chamber (70), the relief valve plate (80) being configured to open or close the communication hole.

5. The scroll compressor according to claim 4, wherein the relief valve seat (81) and the high pressure diaphragm (6) are integrally formed.

6. A scroll compressor according to claim 2, wherein the connecting piece (9) and the fixed scroll (1) are integrally formed.

7. The scroll compressor of claim 1, wherein the scroll compressor comprises:

the connecting piece (9), the auxiliary exhaust hole (1 a) is formed in the connecting piece (9), the auxiliary exhaust hole (1 a) of the connecting piece (9) is communicated with the auxiliary exhaust hole (1 a) of the static vortex plate (1) and the auxiliary exhaust hole (1 a) of the high-pressure partition plate (6), the auxiliary exhaust hole (1 a) of the static vortex plate (1) is communicated with the compression cavity, and the auxiliary exhaust hole (1 a) of the high-pressure partition plate (6) is communicated with the exhaust cavity (70);

the pressure release valve (8) is configured to open or close the auxiliary exhaust hole (1 a) on the high-pressure partition plate (6) based on the magnitude relation between the pressure in the compression chamber and the exhaust pressure.

8. A scroll compressor according to claim 7, wherein the connection piece (9) is integrally formed with the fixed scroll (1) or the high pressure separator (6).

9. The scroll compressor of any one of claims 1 to 8, wherein the relief valve (8) comprises a relief valve backplate (82), a relief valve plate (80), and a return spring (83) pre-compressed between the relief valve backplate (82) and the relief valve plate (80);

the relief valve plate (80) is configured to communicate the compression chamber and the discharge chamber (70) against the elastic force of the return spring (83) when the pressure in the compression chamber exceeds the discharge pressure.

10. The scroll compressor of claim 9, wherein the relief valve back plate (82) is further provided with a reset bore (821) in communication with the discharge chamber (70), and the reset bore (821) is configured to direct pressure within the discharge chamber (70) onto the relief valve plate (80) to reset the relief valve plate (80) when the discharge pressure is not exceeded by the pressure within the compression chamber.