CN209976794U - Air supplementing valve of scroll compressor and scroll compressor - Google Patents

Abstract

The utility model discloses an aeration valve of a scroll compressor, which comprises an aeration pipe and a one-way valve; the air supplement pipe comprises an inlet end communicated with the outside of the compressor and an outlet end communicated with the air supplement hole of the static scroll, the outlet end comprises 2 outlet branch pipes, the tail ends of the outlet branch pipes form accommodating cavities, the one-way valves are arranged in the accommodating cavities, and through holes are formed in the one-way valves. This scheme still discloses a compressor, contains above-mentioned gulp valve, controller, whirlpool dish, actuating system and casing, and whirlpool dish is provided with the gulp pipe with the last tonifying qi hole intercommunication of quiet whirlpool dish including moving whirlpool dish and quiet whirlpool dish on the casing. This scheme provides the gulp valve to the scroll compressor who adopts asymmetric whirlpool dish for gas energy gets into whirlpool dish in the gulp pipe way, and gas can not get into the gulp pipe way in the whirlpool dish, avoids taking place to cross gas mutually through the gulp pipe between 2 tonifying qi holes, has reduced the energy consumption of compressor, has improved compression efficiency.

Description

Air supplementing valve of scroll compressor and scroll compressor

Technical Field

The utility model belongs to the technical field of the compressor, specifically speaking, the utility model relates to a scroll compressor's gulp valve and contain this gulp valve's scroll compressor.

Background

The scroll compressor consists of mainly control part, motor part and compressing part with one pair of scrolls. The existing scroll pan can be divided into a symmetrical scroll pan and an asymmetrical scroll pan. The scroll compressor usually has a fixed internal volume ratio, namely fixed compression, which causes over-compression and under-compression under variable working conditions, and the working efficiency is low. When the external environment temperature is too low, the refrigerant mass flow can be reduced, and if the compressor cannot absorb a certain amount of refrigerant, the refrigerant flow is small, so that the operation requirement of the air conditioning system cannot be met. Scroll compressors have been developed with intermediate air make-up to improve the performance of the scroll compressor in low temperature environments.

In the existing air supply compressor structure, when the external environment temperature is too low, the refrigerant mass flow can be reduced, the compressor can not absorb a certain amount of refrigerant, the refrigerant flow is small, and the operation requirement of an air conditioning system can not be met, so that an air supply hole is designed on a static vortex disc of the compressor, the refrigerant flow of the air conditioning system can be increased, and the operation requirement of the air conditioning system is ensured. The scrolls of the fixed scroll and the movable scroll are engaged to form a plurality of compression spaces, and each compression space has two compression chambers. After the static vortex disk is provided with the air supplementing holes, the air inlet end of the air supplementing pipeline is the same as the external environment of the compressor, and the air outlet end is divided into two branch pipes which respectively correspond to the two air supplementing holes. Because the air supplement pipeline and the compression space are always in a communicated state, the corresponding compression space between the two air supplement holes can be communicated through the air supplement pipeline. During the compression process, the pressure in the compression chamber changes from low to high. When the pressure in the compression chamber is low, gas in the gas supply pipeline enters the compression chamber; when the pressure in the compression chamber is high, the gas in the compression chamber can enter the air supplement pipe. After the refrigerant enters the compression space from the refrigerant inlet of the fixed scroll disk, the pressure of the compression chamber in each compression space is equal in the symmetrical scroll disk, so that the problem of gas leakage between the two gas supplementing holes is avoided. In the asymmetric scroll disk (with 180 deg. difference), the pressure of the compression chamber in each compression space is unequal, so when the pressure in one compression chamber is insufficient or too small, the gas in another compression chamber with higher pressure can enter the compression chamber with lower pressure through two mutually communicated gas supplementing holes. The repeated gas communication among the gas in the 2 compression chambers can increase the power consumption of the compressor and influence the performance of the whole compressor. Therefore, there is a need to develop an air compensating valve for a scroll compressor using an asymmetric scroll and a compressor including the air compensating valve to solve the problem of air leakage between compression chambers.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the air supply valve of the scroll compressor for the asymmetric scroll disk and the compressor comprising the air supply valve are provided, so that air in the air supply pipeline can enter the scroll disk, air in the scroll disk can not enter the air supply pipeline, mutual air leakage is avoided, the power consumption of the compressor is reduced, and the refrigerating capacity of the compressor is improved.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

an air supplement valve of a scroll compressor is used for controlling air supplement at an air supplement hole on a static scroll of the compressor and comprises an air supplement pipe and a one-way valve; the air supplement pipe comprises an inlet end communicated with the outside of the compressor and an outlet end communicated with the air supplement hole of the static scroll, the outlet end comprises 2 outlet branch pipes, the tail ends of the outlet branch pipes form accommodating cavities, the one-way valves are arranged in the accommodating cavities, and through holes are formed in the one-way valves.

Preferably, the cross section of the one-way valve is matched with that of the accommodating cavity.

Preferably, the number of the through holes in the check valve is 2 or more, and the through holes are arranged symmetrically with respect to the axis of the check valve.

Preferably, the through holes are circular arcs or circles.

Preferably, the accommodating cavity is communicated with the air replenishing hole.

Preferably, a clamping piece is arranged on the inner wall of one side of the accommodating cavity close to the air supplementing hole.

The utility model provides a scroll compressor, includes above-mentioned gulp valve, still includes controller, whirlpool dish, actuating system and casing, whirlpool dish is including moving whirlpool dish and quiet whirlpool dish, be provided with on the casing the gulp pipe, 2 export bleeder pipes of gulp pipe respectively with 2 the tonifying qi hole intercommunication.

Preferably, the main support periphery with the casing inner wall is connected, will casing inner space is separated for low temperature low pressure chamber and high temperature high pressure chamber of mutual separation, be provided with on the casing in low temperature low pressure chamber the intake pipe with the air make-up pipe, be provided with the blast pipe on the casing in high temperature high pressure chamber.

The technical scheme of the utility model the theory of operation introduces as follows: the air supply pipeline of the compressor is closed under the refrigeration working condition; in the heating process, the air supply pipe is opened. In this scheme the gulp valve carries out under the state of tonifying qi at the compressor through the gulp pipe to whirlpool dish, and gas gets into export bleeder then gets into quiet whirlpool dish gulp hole through the air vent on the check valve via the gulp pipe. When the gas in the scroll flows into the gas supplementing pipe, the one-way valve is pushed to block the outlet branch pipe, so that the gas cannot enter the gas supplementing pipe, and the gas in a certain compression cavity in the scroll is prevented from leaking from the gas supplementing hole and entering another compression cavity through the outlet branch pipe. The gulp valve in this scheme can guarantee that the air current between 2 export lateral pipes of gulp pipe is independent each other, and gaseous can not take place to cross the gas phenomenon through 2 gulp holes and the mutual circulation of gulp pipe in the whirlpool dish.

The technical scheme of the utility model the beneficial technological effect who gains is: an air supply valve of a scroll compressor for the asymmetric scroll is provided, so that gas in an air supply pipeline can enter the scroll, but the gas in the scroll cannot enter the air supply pipeline, and the phenomenon that gas is mutually mixed among 2 air supply holes of the static scroll through the air supply pipe is avoided; the air supply valve can effectively reduce the power consumption of the compressor and improve the refrigerating capacity of the compressor. The scroll compressor of this scheme is through with main support and casing inner wall reciprocal anchorage, separates the casing inner space for low temperature low pressure chamber and high temperature high pressure chamber, can arrange the casing outside in low temperature low pressure chamber with the controller like this, and the heat that the controller produced can be taken away to the refrigerant that low temperature low pressure chamber lasts the inflow, avoids the controller overheated and causes electronic components's damage, makes compressor overall structure more small and exquisite compactness simultaneously.

Drawings

FIG. 1 is a schematic sectional view of a horizontal scroll compressor in an embodiment (arrows indicate general gas flow);

FIG. 2 is a sectional view showing the installation of an outlet branch pipe and a check valve of the air supplement pipe in the embodiment (arrows indicate the general flow direction of the gas);

FIG. 3 is a perspective view of the check valve in the embodiment;

fig. 4 is a schematic front view of a fixed scroll of the asymmetric scroll in the embodiment;

fig. 5 is a schematic rear view of a fixed scroll of an asymmetric scroll in an embodiment (a high pressure cover plate is hidden);

FIG. 6 is a schematic sectional view of an asymmetric scroll in an initial operation state;

fig. 7 is a schematic cross-sectional view of the orbiting scroll rotating 90 ° when the asymmetric scroll is operated;

FIG. 8 is a schematic sectional view of the orbiting scroll rotated 180 degrees when the asymmetric scroll is operated;

fig. 9 is a schematic sectional view of an asymmetric scroll operating with the orbiting scroll rotated 270 °;

fig. 10 is a schematic cross-sectional view of an orbiting scroll rotating 360 ° when the asymmetric scroll is operated;

FIG. 11 is a schematic diagram showing the relationship between discharge pressure and suction pressure during the operation of the asymmetric scroll in the embodiment;

FIG. 12 is a schematic diagram showing a relation between a discharge pressure and a suction pressure in an operation of an asymmetric scroll in a comparative example;

reference numerals: 1-a controller, 2-a fixed scroll, 2 a-a fixed scroll back, 2 b-a fixed scroll wrap, 3-an orbiting scroll, 3 a-an orbiting scroll end face, 3 b-an orbiting scroll wrap, 4-a low-temperature low-pressure cavity, 5-a high-temperature high-pressure cavity, 6-a main bracket, 7-an auxiliary bracket, 8-a motor, 9-a containing cavity, 10-an outlet branch pipe, 11-a driving shaft, 12-a sealing cavity, 13-an oil discharge hole, 14-a high-pressure cover plate, 15-a first through hole, 16-a second through hole, 17-a refrigerant inlet, 18-a central exhaust hole, 19-an air supplement hole, 19 a-a first air supplement hole, 19 b-a second air supplement hole, 20 a-a first compression cavity, 20 b-a second compression cavity and 21-an air supplement pipe, 22-exhaust pipe, 23-intake pipe, 24-compression space, 25-intake channel, 26-machine shell, 27-third through hole, 28-one-way valve, 29-through hole and 30-fastener.

Detailed Description

The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.

Example 1

Referring to fig. 1, the specific structure of the horizontal scroll compressor of the present embodiment includes: controller 1, housing 26, and a pair of scrolls, brackets, and drive systems inside housing 26. The scroll comprises a fixed scroll 2 and an orbiting scroll 3, the drive system comprises a motor 8, a stator (not numbered in the figure), a rotor (not numbered in the figure) and a drive shaft 11, and the support comprises a main support 6 and an auxiliary support 7. An air inlet pipe 23 and an air supplement pipe 21 are arranged at the position of the casing 26 close to the controller 1, and an air exhaust pipe 22 is arranged at the other end of the casing 26. Referring also to fig. 2, the air supply pipe 21 includes an inlet end communicating with the outside of the compressor and an outlet end divided into two outlet branch pipes (not shown). The scroll disk is arranged on a main bracket 6 in the shell 26, and 2 air supplement holes (not marked in the figure) on the fixed scroll disk 2 are positioned on the same side of the transverse shaft of the compressor; two outlet branch pipes at the outlet end of the air supply pipe 21 are respectively communicated with 2 air supply holes on the static scroll 2 correspondingly.

Continuing to refer to the schematic diagram 1, in the present embodiment, the periphery of the main support 6 is fixedly connected with the inner wall of the housing 26 by laser welding, so as to divide the inner space of the housing 26 into the low-temperature low-pressure chamber 4 and the high-temperature high-pressure chamber 5 which are separated from each other. The static scroll 2 is positioned in the low-temperature low-pressure cavity 4, and an air inlet pipe 23 and an air supplement pipe 21 are arranged on a casing 26 of the low-temperature low-pressure cavity 4; the motor 8 is located in the high-temperature high-pressure cavity 5, and an exhaust pipe 22 is arranged at the end part of a casing 26 of the high-temperature high-pressure cavity 5. The controller 1 is fixed on the casing 26 at one side of the low temperature and low pressure chamber 4, and one end of the main bracket 6 and the driving system are located at the high temperature and high pressure chamber 5. Wherein, the fixed scroll 2 is fixed on the first end of the main bracket 6, and the movable scroll 3 is arranged between the main bracket 6 and the fixed scroll 2. The main support 6 is provided with a second through hole 16 on a sidewall thereof. The second end of the main bracket 6 is connected with the first end of a driving shaft 11, the second end of the driving shaft 11 is connected to the auxiliary bracket 7 through a bearing (not marked in the figure), and the motor 8 drives the rotor to rotate through the driving shaft 11. The periphery of the auxiliary support 7 is fixedly connected with the inner wall of the machine shell 26, and a third channel 27 for high-temperature and high-pressure gas to circulate is arranged on the auxiliary support 7.

Referring to fig. 4 and 5, the scroll structure in this embodiment is described as an asymmetric scroll, and 2 air supply holes 19 are formed in the fixed scroll, the air supply holes 19 are located between two circles of fixed scroll wraps 2b, one air supply hole 19 is close to the outer fixed scroll wrap 2b, and the other air supply hole 19 is close to the inner fixed scroll wrap 2 b; the side wall of the static vortex disc is provided with a first channel 15 which penetrates through the whole static vortex disc and allows high-temperature and high-pressure gas to flow out. In the embodiment, the back surface 2a of the fixed scroll disk can see a central exhaust hole 18, 2 air supply holes 19, 4 oil discharge exhaust holes 13 and a first through hole 15 positioned on the side wall of the fixed scroll disk, a refrigerant inlet 17 is formed by a notch at the edge of the fixed scroll disk, and the refrigerant inlet 17 is communicated with an air inlet channel 25. Referring also to fig. 1, the high-pressure cover plate 14 is a pentahedral structure with an open bottom and closed other surfaces and capable of resisting high pressure. The high-pressure cover plate 14 is fastened and fixed on the back surface 2a of the fixed scroll through bolts, clamping pieces or sealant and the like, and a sealing cavity 12 is formed between the high-pressure cover plate 14 and the back surface 2a of the fixed scroll. Wherein, one end opening of the first through hole 15 is located in the sealed cavity 12.

Referring to fig. 2 and 3, the gulp valve in the present embodiment is described, including a gulp tube 21 and a one-way valve 28; the air supply pipe 21 comprises an inlet end communicated with the outside of the compressor and an outlet end communicated with the air supply hole of the fixed scroll, and the outlet end comprises 2 outlet branch pipes 10. The end of the outlet branch pipe 10 forms a containing cavity 9, the containing cavity 9 is communicated with the air replenishing hole 19, the one-way valve 28 is arranged in the containing cavity 9, and the one-way valve 28 is provided with a through hole 29. The cross section of the one-way valve 28 is matched with that of the accommodating cavity 9, and the size of the one-way valve 28 is slightly smaller than that of the accommodating cavity 9, so that the one-way valve can slide in the accommodating cavity 9 along the horizontal direction. In this embodiment, the number of the through holes 29 in the check valve 28 is 3, several through holes 29 are identical in size, and several through holes 29 are symmetrically arranged with respect to the axis of the check valve 28, so that the center of gravity of the check valve 28 in the accommodating chamber 9 is balanced, and the check valve is not prone to toppling when pushed by air flow. In other embodiments, 2 or 4 check valves can be arranged, and several check valves are symmetrically arranged. The through holes 29 are circular arc-shaped or circular, and the distance between the axes of the opposite 2 through holes 29 is larger than the diameter of the position where the outlet branch pipe 10 is communicated with the containing cavity 9; when the check valve 28 is close to the port of the branch outlet pipe 10, once gas in the scroll leaks, the gas flows to push the check valve 28 to be close to the port of the branch outlet pipe 10, and the part of the check valve 28, which is not provided with the through hole 29, can seal the port of the branch outlet pipe 10, so that the gas in the scroll is prevented from entering the other branch outlet hole 19 through one of the gas supplementing holes 19 and the gas supplementing pipe 21. In the non-air-supply state, the air supply valve in the embodiment separates the air in the scroll and the air in the air supply pipe by the one-way valve and does not communicate with each other. When the air supply state is in, the pressure of the air in the air supply pipe is large, the one-way valve is pushed to slide towards the air supply hole, and at the moment, the air in the air supply pipe enters the accommodating cavity and enters the air supply hole through the vent hole in the one-way valve.

Referring to the schematic diagram 3, in the modification of the embodiment, the inner wall of the accommodating cavity 9 near the air supplement hole 19 is provided with a clamping piece 30. This limits the distance that the check valve 28 moves in the receiving cavity 9, and reduces the wear on the periphery of the check valve 28 caused by the long sliding of the check valve 28 in the receiving cavity 9.

The working principle of the horizontal scroll compressor in the embodiment is as follows: referring to a general gas flow direction indicated by an arrow in fig. 1, a refrigerant of low temperature and low pressure enters the low temperature and low pressure chamber 4 from the inlet pipe 23, and then enters the compression space 24 between the fixed scroll 2 and the movable scroll 3 through the refrigerant inlet 17 provided on the fixed scroll 2. The compression space 24 is formed by meshing the scrolls of the fixed scroll 2 and the movable scroll 3, the motor 8 drives the movable scroll 3 to rotate around the base circle center of the fixed scroll 2 in a plane with a small radius through the driving shaft 11, the refrigerant gas is continuously extruded in the compression space 24 to move towards the center of the fixed scroll 2 and is gradually compressed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the sealed cavity 12 after being discharged from the central exhaust port 18 of the fixed scroll 2, then enters the area where the motor 8 is located, namely the high-temperature high-pressure cavity 5 through the first through hole 15 formed in the side wall of the fixed scroll 2 and the second through hole 16 formed in the main support 6, and then the high-temperature high-pressure gas passes through the third channel 27 on the auxiliary support 7 and then is discharged through the exhaust pipe. In the working state, a pressure difference exists at intervals of 180 degrees, and the pressures of the compression cavities at intervals of 180 degrees are different, so that the 2 air replenishing holes correspond to different compression cavities respectively. When the external environment temperature is too low, the refrigerant mass flow can be reduced, the compressor can not absorb a certain amount of refrigerant, in order to increase the refrigerant circulation flow, 2 air supply holes are designed on the static scroll, and the air supply pipe is communicated with the air supply holes. When the external environment temperature is lower and heating is needed, low-temperature and low-pressure refrigerant gas is supplemented into the static scroll disk through the gas supplementing pipe. In the scroll compressor in the embodiment, the air supply pipe is not communicated with the air supply hole of the fixed scroll in the non-air supply state. In the state that the compressor supplies air to the scroll disk through the air supply pipe, air enters through the air supply pipe and pushes the check valve away, and enters the static scroll disk air supply hole through the vent hole in the check valve. When the gas in the scroll moves into the gas supplementing pipe, the one-way valve is pushed to block the outlet branch pipe, so that the gas in a certain compression cavity in the scroll is prevented from leaking from the gas supplementing hole and entering another compression cavity through the outlet branch pipe. The arrangement can ensure that the gas in the vortex disk can not flow through the gas supplementing pipe to cause gas cross.

Referring to fig. 6 to 10, which are horizontal sectional views illustrating an asymmetric scroll in an operation state during air supply, a compression chamber is formed between wrap 3b of orbiting scroll 3 and wrap 2b of fixed scroll 2. In fig. 6, the first compression chamber 20a is just closed and is not communicated with the first air supplement hole 19a, and the first compression chamber 20a has suction pressure; the second compression cavity 20b is in gas communication with the gas inlet pipe, and is not in gas communication with the gas supplementing hole, and at this time, the suction pressure is obtained. In fig. 7, orbiting scroll 3 rotates 90 ° from the initial state of fig. 6, and first compression chamber 20a communicates with first air supplement hole 19a, where pressure of first compression chamber 20a is increased to be greater than suction pressure; the second compression cavity 20b is in gas communication with the gas inlet pipe and is not communicated with the gas of the gas supplementing hole, and the pressure is the suction pressure; in this state, the gas pressure at the first gas replenishment hole 19a is higher than the pressure at the second gas replenishment hole 19 b. In fig. 8, orbiting scroll 3 rotates by 180 ° from the initial state of fig. 6, and first compression chamber 20a communicates with first air supplement hole 19a, where the pressure rises to be greater than the suction pressure; the second compression chamber 20b is just closed and is communicated with the second air supply port 19b, and the pressure is the suction pressure. In fig. 9, orbiting scroll 3 is rotated by 270 ° from the initial state of fig. 6, and first compression chamber 20a communicates with first air supplement hole 19 a; the second compression cavity 20b is communicated with the second air supplement hole 19 b; at this time, the pressure of the first air replenishing hole 19a is higher than the pressure of the second air replenishing hole 19 b. In fig. 10, orbiting scroll 3 is rotated by 360 ° from the initial state of fig. 6, at which time first compression chamber 20a is not communicated with first gas supply hole 19 a; the second compression chamber 20b communicates with the second suction hole 19 b.

As can be seen from the detailed description of the operation of the scrolls in fig. 6 to 10, in the prior art, 2 outlet branch pipes at the outlet end of the air supply pipe are directly communicated with the air supply hole on the fixed scroll, at this time, the gas in the scroll is communicated with the gas in the air supply pipe, and the gas between the first compression chamber 20a and the second compression chamber 20b can be mutually communicated through the air supply pipe. Referring to a gas pressure change curve in a scroll disk working state in a schematic diagram 11, wherein a vertical coordinate is a pressure value, and a horizontal coordinate is an angle of rotation of the movable scroll disk; the solid line indicates the pressure change curve of the first compression chamber 20a communicated with the first gas supplementing hole 19a, the dotted line indicates the pressure change curve of the second compression chamber 20b communicated with the second gas supplementing hole 19b, it can be known that the gas between the first gas supplementing hole 19a and the second gas supplementing hole 19b is communicated through the gas supplementing pipe, and the broken line indicates the pressure change when the gas between the 2 gas supplementing holes is mutually communicated. In the embodiment, the compressor is provided with an air compensating valve, and a gas pressure change curve in the working state of the scroll disk is shown in a schematic diagram 12, wherein the ordinate is a pressure value, and the abscissa is the rotating angle of the movable scroll disk; in this embodiment, it is understood that the gas between the first gas compensation hole 19a and the second gas compensation hole 19b does not cross each other. To sum up, the gulp valve in this embodiment can avoid the compressed gas in the compression chamber that 2 mends gas holes correspond to take place the condition of gas mixing each other through the gulp pipe, is showing the energy consumption that has reduced the compressor, has effectively improved the efficiency of compressor.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be understood as merely illustrative of the present invention and not as limiting the scope of the invention. After reading the description of the present invention, the skilled person can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope of the present invention defined by the claims.

Claims (8)

1. An air supplement valve of a scroll compressor is used for controlling air supplement at an air supplement hole on a static scroll of the compressor and is characterized by comprising an air supplement pipe and a one-way valve; the air supplement pipe comprises an inlet end communicated with the outside of the compressor and an outlet end communicated with the air supplement hole of the static scroll, the outlet end comprises 2 outlet branch pipes, the tail ends of the outlet branch pipes form accommodating cavities, the one-way valves are arranged in the accommodating cavities, and through holes are formed in the one-way valves.

2. The gulp valve of a scroll compressor as recited in claim 1, wherein the cross-section of the one-way valve is matched to the cross-section of the receiving cavity.

3. The aeration valve for a scroll compressor according to claim 2, wherein the number of the through holes of the check valve is 2 or more, and the through holes are symmetrically arranged about the axis of the check valve.

4. The gulp valve of a scroll compressor as claimed in claim 3, wherein the through holes are rounded or circular.

5. The gulp valve of a scroll compressor as recited in claim 4, wherein the receiving cavity communicates with the gulp hole.

6. The air compensating valve of the scroll compressor as claimed in claim 5, wherein a latch is provided on an inner wall of the receiving chamber on a side thereof adjacent to the air compensating hole.

7. A scroll compressor, comprising the gulp valve of any one of claims 1-6, further comprising a controller, a scroll, a driving system and a casing, wherein the scroll comprises a movable scroll and a fixed scroll, the fixed scroll is provided with 2 gas supplementing holes, the casing is provided with the gas supplementing pipe, and 2 outlet branch pipes of the gas supplementing pipe are respectively communicated with the 2 gas supplementing holes.

8. The scroll compressor according to claim 7, further comprising a main support, wherein a periphery of the main support is connected to an inner wall of the casing to divide an inner space of the casing into a low-temperature low-pressure chamber and a high-temperature high-pressure chamber, the low-temperature low-pressure chamber is provided with an inlet pipe and the air supply pipe, and the high-temperature high-pressure chamber is provided with an outlet pipe.

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