Scroll compressor

Abstract

The application relates to a scroll compressor, which comprises a fixed disc, a moving disc, a machine body and a crankshaft, the fixed disc and the machine body are respectively arranged on the two sides of the moving disc, the fixed disc and the moving disc jointly define a compression cavity, the crankshaft is arranged on the machine body and connected with the moving disc to drive the moving disc to move horizontally relative to the fixed disc, and a jet enthalpy-increasing channel is arranged on the machine body and used for inputting refrigerant from outside. According to the scroll compressor, the jet enthalpy-increasing channel of the scroll compressor is arranged on the machine body and located in a low-temperature area of the scroll compressor, the heating of the enthalpy-increasing gas by the high temperature inside the scroll compressor can be avoided, and the air supplementing effect can be improved.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and more particularly to a scroll compressor. Background Technology

[0002] To enhance the heating capacity of heat pump systems in low-temperature environments and achieve rapid heating at ultra-low temperatures, enthalpy-increasing scroll compressors are being widely used in various heat pump systems, including multi-split systems, refrigeration and cold storage systems, and vehicle air conditioning systems. With increasing awareness of energy conservation and environmental protection, high-efficiency heat pump systems are gradually becoming the market leader. As a quasi-two-stage compression enthalpy-increasing scroll compressor technology, the medium-pressure refrigerant directly enters the compression chamber through the enthalpy-increasing pipeline, where it mixes and compresses with the high-temperature refrigerant, achieving a cooling effect on the compressor chamber.

[0003] The existing technology uses a solution to set up an enthalpy-increasing channel on the compressor stator side. Since the compressor enthalpy-increasing channel is located on the high-temperature side of the compressor exhaust, the enthalpy-increasing gas will be heated by the high temperature of the exhaust when passing through the enthalpy-increasing channel, which affects the gas replenishment effect. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a scroll compressor in which the jet enthalpy-enhancing channel is located on the compressor body in the low-temperature region of the scroll compressor, which can avoid the heating of the enthalpy-enhancing gas by the high internal temperature of the scroll compressor and improve the gas replenishment effect.

[0005] The scroll compressor according to the present invention includes: a fixed plate, a moving plate, a housing, and a crankshaft. The fixed plate and the housing are respectively disposed on both sides of the moving plate, and the fixed plate and the moving plate together define a compression chamber. The crankshaft is disposed on the housing and connected to the moving plate to drive the moving plate to translate relative to the fixed plate. The housing is provided with a jet enthalpy enhancement channel, which communicates with the compression chamber and is used to input refrigerant from the outside.

[0006] According to the scroll compressor of the present invention, the vapor injection enthalpy enhancement channel includes an inlet end for inputting the refrigerant from the outside, and a gas replenishment check valve is provided in the vapor injection enthalpy enhancement channel. The gas replenishment check valve includes a movable part, at least a portion of which is configured to selectively move toward the inlet end to close the vapor injection enthalpy enhancement channel or move away from the inlet end to open the vapor injection enthalpy enhancement channel.

[0007] According to the scroll compressor of the present invention, the gas replenishment check valve includes a limiting part, a movable part, and an elastic element. The two ends of the elastic element are respectively connected to the movable part and the machine body. The limiting part is located on the side of the movable part near the inlet end. The elastic element is deformable. The movable part can be moved to a position that abuts against the limiting part and to a position that is spaced apart from it.

[0008] According to the scroll compressor of the present invention, a first gas supply channel is provided on the fixed plate or the moving plate, and the jet enthalpy increasing channel, the first gas supply channel and the compression chamber are connected in sequence.

[0009] Optionally, the jet enthalpy enhancement channel includes a second gas supply channel and a gas supply check chamber. The second gas supply channel, the gas supply check chamber, and the first gas supply channel are connected in sequence. The second gas supply channel defines the inlet end, and the gas supply check valve is provided at the inlet of the gas supply check chamber.

[0010] Optionally, the jet enthalpy enhancement channel further includes a gas replenishment buffer chamber, and the second gas replenishment channel, the gas replenishment buffer chamber, the gas replenishment check chamber, and the first gas replenishment channel are connected in sequence.

[0011] Optionally, the gas replenishment buffer chamber includes multiple chambers, and adjacent gas replenishment buffer chambers are connected through a first conductive channel. The gas replenishment check chamber is connected to at least one of the gas replenishment buffer chambers through the gas replenishment check valve.

[0012] Optionally, the machine body is further provided with a medium-pressure chamber, which is connected to the gas replenishment check chamber through a second conductive channel.

[0013] Optionally, the gas replenishment check valve includes a limiting baffle, a fixed part, and a movable part. The fixed part connects the limiting baffle, the movable part, and the body. The limiting baffle blocks the inlet of the gas replenishment check chamber. The limiting baffle is provided with a third guiding channel. The movable part is disposed in the gas replenishment check chamber. The movable part has a first position that abuts against the limiting baffle and a second position that is at least partially spaced from the limiting baffle. When the movable part is in the first position, it blocks the third guiding channel. When the movable part is in the second position, it avoids the third guiding channel.

[0014] Optionally, the machine body is provided with a mounting groove, and a support cover plate is provided in the mounting groove. One side of the support cover plate abuts against the moving plate. The support cover plate is provided with a low-pressure throttling channel, and the fixed plate is provided with a high-pressure throttling channel. The low-pressure throttling channel and the high-pressure throttling channel are connected.

[0015] Optionally, the machine body is further provided with one or more medium-pressure chambers, the medium-pressure chambers are spaced apart from the gas replenishment check chamber, and when there are multiple medium-pressure chambers, the multiple medium-pressure chambers are connected through a fourth conductive channel.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] The jet enthalpy-increasing channel of the scroll compressor is located on the machine body to inject refrigerant into the compression chamber during the operation of the scroll compressor. It is located in the low temperature region of the scroll compressor, which can avoid the heating of the enthalpy-increasing gas by the high internal temperature of the scroll compressor and improve the gas injection effect. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of a scroll compressor according to Embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 Cross-sectional view at point AA;

[0022] Figure 3 This is a partially enlarged view of the scroll compressor according to Embodiment 1 of the present invention;

[0023] Figure 4 This is a partially enlarged view of the scroll compressor according to Embodiment 2 of the present invention;

[0024] Figure 5 This is a cross-sectional view of a scroll compressor according to Embodiment 3 of the present invention;

[0025] Figure 6 for Figure 5 Cross-sectional view at point BB;

[0026] Figure 7 This is a cross-sectional view of a scroll compressor according to Embodiment 4 of the present invention;

[0027] Figure 8 This is a partially enlarged view of the scroll compressor according to Embodiment 5 of the present invention;

[0028] Figure 9 for Figure 8 Cross-sectional view at point C;

[0029] Figure 10 This is a partially enlarged view of the scroll compressor according to Embodiment Six of the present invention;

[0030] Figure 11 This is a partially enlarged view of the scroll compressor according to Embodiment 7 of the present invention.

[0031] Figure label:

[0032] 1. Top cover, 2. Fixed plate, 201. First air supply channel, 202. Air supply port, 203. High-pressure throttling channel, 3. Moving plate, 4. Body, 5. Rear cover, 6. Drive motor, 7. Crankshaft, 8. Housing intake port, 9. Low-pressure chamber, 10. Air supply buffer chamber, 101. First air supply buffer chamber, 102. Second air supply buffer chamber, 103. Third air supply buffer chamber, 104. Fourth air supply buffer chamber, 11. Medium-pressure chamber, 111. First medium-pressure chamber, 112. Second medium-pressure chamber, 113. Intake chamber, 12. Compression chamber, 13. Exhaust chamber, 14. Oil distribution chamber, 15. Second air supply. Channel 16, Air replenishment check valve 17, Third conduction channel 171, Moving part 172, Limiting baffle 173, Fixed part 174, Elastic element 175, Air replenishment check chamber 18, Support cover plate 19, Connecting hole 191, Low-pressure throttling channel 192, Moving disc bearing 20, Eccentric block 21, Main bearing 22, First seal 23, Sealing cover plate 25, Limiting part 27, Second seal 28, First conduction channel 402, Second conduction channel 403, Fourth conduction channel 404, Low-pressure oil return channel 405, Sixth conduction channel 261. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0035] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0036] like Figure 1 , Figure 5 as well as Figure 6 As shown, the scroll compressor according to an embodiment of the present invention includes: a fixed plate 2, a moving plate 3, a body 4, and a crankshaft 7. The fixed plate 2 and the body 4 are respectively disposed on both sides of the moving plate 3. The fixed plate 2 and the moving plate 3 together define a compression chamber 13. The crankshaft 7 is disposed on the body 4 and connected to the moving plate 3 to drive the moving plate 3 to translate relative to the fixed plate 2. The body 4 is provided with a jet enthalpy enhancement channel for inputting refrigerant from the outside.

[0037] To elaborate, the jet enthalpy enhancement channel is located on the casing 4, which is the low-temperature region of the scroll compressor. This avoids the refrigerant in the jet enthalpy enhancement channel being heated by the temperature of the scroll compressor, thereby improving the gas injection effect, reducing the temperature of the compression chamber 13, and increasing the compression capacity of the scroll compressor.

[0038] Secondly, the fixed plate 2 includes a first scroll tooth, and the moving plate 3 includes a second scroll tooth. The first scroll tooth and the second scroll tooth mesh to define the compression chamber 13.

[0039] According to an embodiment of the present invention, the scroll compressor has a jet enthalpy-increasing channel disposed on the body 4 to inject refrigerant into the compression chamber 13 during the operation of the scroll compressor. Being located in the low-temperature region of the scroll compressor, it can avoid the heating of the enthalpy-increasing gas by the high internal temperature of the scroll compressor, thereby improving the gas injection effect.

[0040] like Figure 1 and Figure 7As shown, in the scroll compressor according to an embodiment of the present invention, the vapor injection enthalpy enhancement channel and the compression chamber 13 are connected. The vapor injection enthalpy enhancement channel includes an inlet end for inputting refrigerant from the outside. A gas replenishment check valve 17 is provided in the vapor injection enthalpy enhancement channel. The gas replenishment check valve 17 includes a movable part 172. At least a portion of the movable part 172 is configured to selectively move toward the inlet end to close the vapor injection enthalpy enhancement channel or move away from the inlet end to open the vapor injection enthalpy enhancement channel.

[0041] Specifically, the gas replenishment check valve 17 includes a movable part 172. At least a portion of the movable part 172 is configured to selectively move toward the inlet end to close the vapor injection enthalpy channel or move away from the inlet end to open the vapor injection enthalpy channel. That is, when the pressure on the side of the movable part 172 toward the inlet end is greater than the pressure on the side of the movable part 172 away from the inlet end, at least a portion of the movable part 172 can move toward the direction away from the inlet end to open the vapor injection enthalpy channel, allowing refrigerant to be input from the outside into the vapor injection enthalpy channel and enter the compression chamber 13; when the pressure on the side of the movable part 172 toward the inlet end is less than or equal to the pressure on the side of the movable part 172 away from the inlet end, at least a portion of the movable part 172 moves toward the inlet end to close the vapor injection enthalpy channel, thereby preventing refrigerant backflow.

[0042] It should be noted that the inlet end is a section from one end of the jet enthalpy enhancement channel to the other end of the jet enthalpy enhancement channel near the compression chamber 13. The length can be defined as needed and is not specifically limited. In this way, no matter what shape or structure the jet enthalpy enhancement channel is configured in a specific embodiment, it will not affect the description of the operation or function of the gas replenishment check valve 17 in this application.

[0043] It should also be noted that the movement toward or away from the entrance end can be a straight line movement, a curved movement, or an inclined movement; this application does not impose any restrictions.

[0044] Furthermore, the jet enthalpy enhancement channel can be configured as a single, integral channel or include other chambers. For example, in some embodiments, the jet enthalpy enhancement channel can be configured as a single, integral channel. Figure 7 As shown, the jet enthalpy enhancement channel only includes the second gas replenishment channel 16, but does not include the gas replenishment check chamber 18, which can further reduce the check volume and improve the gas replenishment check effect.

[0045] In some embodiments, the body 4 includes a housing and a support frame; in some embodiments, the body 4 is an integral structure.

[0046] like Figure 7As shown, in the scroll compressor according to an embodiment of the present invention, the gas replenishment check valve 17 includes a limiting part 27, a movable part 172, and an elastic member 175. The two ends of the elastic member 175 are respectively connected to the movable part 172 and the body 4. The limiting part 27 is provided on the side of the movable part 172 near the inlet end. The elastic member 175 is deformable, and the movable part 172 can be moved to a position that stops against the limiting part 27 and to a position that is spaced apart.

[0047] Specifically, when the pressure on the side of the movable part 172 facing the inlet end is greater than the pressure on the side of the movable part 172 away from the inlet end, the movable part 172 can compress the elastic member 175 to move in the direction away from the inlet end. In this way, the movable part 172 and the limiting part 27 are spaced apart to open the jet enthalpy enhancement channel, and the refrigerant can be input from the outside into the jet enthalpy enhancement channel and enter the compression chamber 13. When the pressure on the side of the movable part 172 facing the inlet end is less than or equal to the pressure on the side of the movable part 172 away from the inlet end, the movable part 172 moves towards the inlet end under the reset force of the elastic member 175. In this way, the movable part 172 and the limiting part 27 stop to close the jet enthalpy enhancement channel, thereby preventing the refrigerant backflow.

[0048] In some embodiments, the elastic element 175 is configured as a spring.

[0049] like Figures 1-4 As shown, in the scroll compressor according to an embodiment of the present invention, a first gas supply channel 201 is provided on the fixed plate 2 or the moving plate 3, and the jet enthalpy channel, the first gas supply channel 201 and the compression chamber 13 are connected in sequence.

[0050] That is, in some embodiments, such as Figure 1 and Figure 3 In the first embodiment shown, the fixed plate 2 is provided with a first air supply channel 201, and the jet channel, the first air supply channel 201, and the compression chamber 13 are connected in sequence. In some embodiments, such as... Figure 4 In the second embodiment shown, the moving plate 3 is provided with a first air replenishment channel 201, and the jet enthalpy enhancement channel, the first air replenishment channel 201 and the compression chamber 13 are connected in sequence.

[0051] like Figures 1-4 As shown, in some embodiments, the jet enthalpy enhancement channel includes a second gas supply channel 16 and a gas supply check chamber 18. The second gas supply channel 16, the gas supply check chamber 18 and the first gas supply channel 201 are connected in sequence. The second gas supply channel 16 defines the inlet and outlet ends, and a gas supply check valve 17 is provided at the inlet of the gas supply check chamber 18.

[0052] Specifically, the second gas supply channel 16 defines the inlet and outlet ends for communication with the outside. Refrigerant is introduced into the second gas supply channel 16, and then the refrigerant is introduced from the second gas supply channel 16 through the gas supply check valve 17 into the gas supply check chamber 18. After that, it flows out from the gas supply check chamber 18, passes through the first gas supply channel 201, and enters the compression chamber 13.

[0053] Among them, the gas replenishment check chamber 18 can further alleviate refrigerant pressure fluctuations and improve the gas replenishment effect of the scroll compressor.

[0054] like Figure 8 and Figure 10 As shown, in some embodiments, the gas replenishment check chamber 18 is connected to the first gas replenishment channel 201 through the sixth conductive channel 261.

[0055] like Figure 10 As shown, in some embodiments, the first air supply channel 201 includes an air supply port 202, which is connected to the compression chamber 13.

[0056] like Figure 1 , Figure 8 as well as Figure 10 As shown, in some embodiments, the jet enthalpy-enhancing channel further includes a gas replenishment buffer chamber 10, and the second gas replenishment channel 16, the gas replenishment buffer chamber 10, the gas replenishment check chamber 18, and the first gas replenishment channel 201 are sequentially connected. After the refrigerant enters the machine body 4 through the second gas replenishment channel 16, it enters the gas replenishment buffer chamber 10. After being buffered and its pressure stabilized in the gas replenishment buffer chamber 10, it enters the gas replenishment check chamber 18, and then enters the compression chamber 13 through the first gas replenishment channel 201. In this way, the gas replenishment buffer chamber 10 can effectively mitigate the pressure fluctuations of the refrigerant entering from the outside.

[0057] The number of air replenishment buffer chambers 10 can be one or more.

[0058] like Figure 2 As shown, in some embodiments, the air replenishment buffer chamber 10 includes multiple chambers, and adjacent air replenishment buffer chambers 10 are connected through a first conductive channel 402. The air replenishment check chamber 18 is connected to at least one of the air replenishment buffer chambers 10 through an air replenishment check valve 17.

[0059] It is understandable that setting multiple gas replenishment buffer chambers 10 on the body 4, rather than a single large gas replenishment buffer chamber 10, can enhance the structural strength of the body 4. By connecting adjacent gas replenishment buffer chambers 10 sequentially through the first conductive channel 402, multiple gas replenishment buffer chambers 10 can be connected. This ensures the pressure buffering effect of the gas replenishment buffer chambers 10 on the refrigerant while maintaining the structural strength of the body 4.

[0060] like Figure 1As shown, in some embodiments, the gas replenishment check chamber 18 is connected to one of the gas replenishment buffer chambers 10 via a gas replenishment check valve 17; in other embodiments, the gas replenishment check chamber 18 is connected to multiple gas replenishment buffer chambers 10 via multiple gas replenishment check valves 17. It is understood that by only providing the gas replenishment check chamber 18 connected to one of the gas replenishment buffer chambers 10 via gas replenishment check valves 17, reducing the volume of the gas replenishment check chamber 18 for small-displacement scroll compressors can improve the gas replenishment effect.

[0061] like Figure 4 As shown, in some embodiments, the body 4 is further provided with a medium-pressure chamber 11, which is connected to the gas replenishment check chamber 18 through a second conductive channel 403. The medium-pressure chamber 11 can accommodate the medium-pressure back pressure. The medium-pressure chamber 11 and the gas replenishment check chamber 18 are at the same pressure, both being the gas replenishment medium-pressure. Their connection through the second conductive channel 403 further enhances the gas replenishment effect of the scroll compressor.

[0062] Example 1:

[0063] like Figures 1-3 As shown, the first air supply channel 201 is located on the fixed plate 2. The scroll compressor also has an air supply check chamber 18 and an air supply buffer chamber 10. A rear cover 5 is located on the side of the machine body 4 away from the moving plate 3. A drive motor 6 is also located on the machine body 4, which drives the crankshaft 7 to move. A support cover plate 19 is also located on the machine body 4, and a connecting hole 191 is provided on the support cover plate 19. The connecting hole 191 is used to connect the air supply check chamber 18 and the first air supply channel 201. The machine body 4 also has a housing intake port 8 and a low-pressure chamber 9. An upper cover 1 is also located on the side of the fixed plate 2 away from the moving plate 3. The fixed plate 2 and the moving plate 3 together define the intake chamber 12. The fixed plate 2 also defines the exhaust chamber 14. The upper cover 1 defines the oil distribution chamber 15. The machine body 4 also has a moving plate bearing 20, an eccentric block 21, and a main bearing 22. A first seal 23 is used to seal and isolate the intermediate pressure chamber 11.

[0064] The gas replenishment check valve 17 includes a limiting baffle 173, a fixed part 174, and a movable part 172. The fixed part 174 connects the limiting baffle 173, the movable part 172, and the body 4. The limiting baffle 173 blocks the entrance to the gas replenishment check chamber 18. The limiting baffle 173 is provided with a third guiding channel 171. The movable part 172 is located in the gas replenishment check chamber 18. The movable part 172 has a first position that abuts against the limiting baffle 173 and a second position that is at least partially spaced from the limiting baffle 173. When the movable part 172 is in the first position, it blocks the third guiding channel 171. When the movable part 172 is in the second position, it avoids the third guiding channel 171.

[0065] Thus, when the pressure on the side of the movable part 172 near the third conduction channel 171 is greater than the pressure on the side of the movable part 172 away from the third conduction channel 171, the air pressure will push the movable part 172 toward the inside of the gas replenishment check chamber 18, thereby opening the third conduction channel 171, allowing the refrigerant to enter the gas replenishment check chamber 18 through the third conduction channel 171. When the pressure on the side of the movable part 172 near the third conduction channel 171 is less than or equal to the pressure on the side of the movable part 172 away from the third conduction channel 171, the pressure on the side of the gas replenishment check chamber 18 will cause the movable part 172 to move toward the side near the third conduction channel 171, causing the movable part 172 to abut against the limiting baffle 173, thereby blocking the outlet of the third conduction channel 171 and preventing backflow.

[0066] Secondly, the air replenishment buffer chamber 10 includes multiple chambers, and adjacent air replenishment buffer chambers 10 are connected through a first conductive channel 402. The air replenishment check chamber 18 is connected to one of the air replenishment buffer chambers 10 through an air replenishment check valve 17. Figure 2 As shown, the multiple air replenishment buffer chambers 10 include a first air replenishment buffer chamber 101, a second air replenishment buffer chamber 102, a third air replenishment buffer chamber 103, and a fourth air replenishment buffer chamber 104.

[0067] Example 2:

[0068] like Figure 4 As shown, in some embodiments, the machine body 4 is provided with an installation groove, and a support cover plate 19 is provided in the installation groove. One side of the support cover plate 19 abuts against the moving plate 3. The support cover plate 19 is provided with a low-pressure throttling channel 192, the fixed plate 2 is provided with a high-pressure throttling channel 203, and the machine body 4 is provided with a low-pressure oil return channel 405. The low-pressure oil return channel 405, the low-pressure throttling channel 192, and the high-pressure throttling channel 203 are connected in sequence.

[0069] In some embodiments, the body 4 is further provided with one or more intermediate pressure chambers 11, which are spaced apart from the gas replenishment check chamber 18. When there are multiple intermediate pressure chambers 11, the multiple intermediate pressure chambers 11 are connected through the fourth conductive channel 404. Placing the intermediate pressure chambers 11 on the body 4 makes the overall structure of the scroll compressor more compact.

[0070] Example 3:

[0071] like Figure 5 and Figure 6 As shown, the body 4 is provided with multiple intermediate pressure chambers 11, which are connected by a fourth conductive channel 404. For ease of explanation, the multiple intermediate pressure chambers 11 are defined as a first intermediate pressure chamber 111, a second intermediate pressure chamber 112, and a third intermediate pressure chamber 113.

[0072] The gas replenishment check valve 17 includes a fixed part 174 and a movable part 172. The fixed part 174 connects the movable part 172 and the body 4. The body 4 is provided with a third conduction channel 171. The movable part 172 is located in the gas replenishment check cavity 18. The movable part 172 has a first position that abuts against the body 4 and a second position that is at least partially spaced from the body 4. When the movable part 172 is in the first position, it blocks the third conduction channel 171. When the movable part 172 is in the second position, it avoids the third conduction channel 171.

[0073] Thus, when the pressure on the side of the movable part 172 near the third conduction channel 171 is greater than the pressure on the side of the movable part 172 away from the third conduction channel 171, the air pressure will push the movable part 172 toward the inside of the gas replenishment check chamber 18, thereby opening the third conduction channel 171, allowing the refrigerant to enter the gas replenishment check chamber 18 through the third conduction channel 171. When the pressure on the side of the movable part 172 near the third conduction channel 171 is less than or equal to the pressure on the side of the movable part 172 away from the third conduction channel 171, the pressure on the side of the gas replenishment check chamber 18 will cause the movable part 172 to move toward the side near the third conduction channel 171, causing the movable part 172 to abut against the body 4, thereby blocking the outlet of the third conduction channel 171 and preventing backflow.

[0074] Example 4:

[0075] like Figure 7 As shown, the air replenishment check valve 17 is located in the second air replenishment channel 16. The air replenishment check valve 17 includes a limiting part 27, a movable part 172, and an elastic member 175. The two ends of the elastic member 175 are respectively connected to the movable part 172 and the body 4. The limiting part 27 is located on the side of the movable part 172 near the inlet end. The elastic member 175 is deformable, and the movable part 172 can move to a position that stops against the limiting part 27 and to a position that is spaced apart.

[0076] Example 5:

[0077] like Figure 8 and Figure 9 As shown, a sealing cover plate 25 is provided on the side of the air replenishment buffer chamber 10 away from the air replenishment check chamber 18, so that the sealing cover plate 25 and the body 4 together define the air replenishment buffer chamber 10. Among them, a second sealing element 28 is provided between the limiting part 27 and the body 4.

[0078] Example 6:

[0079] like Figure 10As shown, the jet enthalpy enhancement channel includes a second gas supply channel 16 and a gas supply check chamber 18. The second gas supply channel 16, the gas supply check chamber 18, and the first gas supply channel 201 are connected in sequence. The second gas supply channel 16 defines the inlet and outlet ends. A gas supply check valve 17 is provided at the inlet of the gas supply check chamber 18. The gas supply check valve 17 includes a limiting part 27, a movable part 172, and an elastic element 175. The two ends of the elastic element 175 are respectively connected to the movable part 172 and the body 4. The limiting part 27 is located on the side of the movable part 172 near the inlet end. The elastic element 175 is deformable, and the movable part 172 can move to a position that stops against the limiting part 27 and to a position that is spaced apart.

[0080] Example 7:

[0081] like Figure 11 As shown, the machine body 4 is provided with an installation groove, and a support cover plate 19 is provided in the installation groove. One side of the support cover plate 19 abuts against the moving plate 3. The machine body 4 and the support cover plate 19 together define the gas replenishment buffer chamber 10. The moving plate 3 and the fixed plate 2 together form the pump body. The pump body restricts the axial clearance through the support cover plate 19, and the support cover plate 19 can move within a small range in the axial direction of the moving plate 3, with a movement range of less than 0.1mm. It relies on the gas replenishment pressure to provide gas support force. When the scroll compressor is running, it presses the moving plate 3 onto the fixed plate 2 to achieve axial sealing. The support cover plate 19 is provided with a sixth conduction channel 261, which connects the gas replenishment check chamber 18 and the first gas replenishment channel 201. The first gas replenishment channel 201 is located on the moving plate 3.

[0082] In the description of this invention, it should also be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0083] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A scroll compressor, characterized in that, include: The system comprises a fixed plate, a moving plate, a housing, and a crankshaft. The fixed plate and the housing are respectively located on both sides of the moving plate, and the fixed plate and the moving plate together define a compression chamber. The crankshaft is mounted on the housing and connected to the moving plate to drive the moving plate to translate relative to the fixed plate. The housing is provided with a jet enthalpy enhancement channel, which communicates with the compression chamber and is used to input refrigerant from the outside. The fixed plate or the moving plate is provided with a first air supply channel, and the jet enthalpy increasing channel, the first air supply channel and the compression chamber are connected in sequence; The jet enthalpy enhancement channel includes a second gas supply channel and a gas supply check chamber, wherein the second gas supply channel, the gas supply check chamber, and the first gas supply channel are connected in sequence. The machine body is also provided with a medium pressure chamber, which is connected to the gas replenishment check chamber through a second conductive channel. The medium pressure chamber is used to accommodate the medium pressure back pressure. The medium pressure chamber and the gas replenishment check chamber are at the same pressure, which is the gas replenishment medium pressure.

2. The scroll compressor according to claim 1, characterized in that, The vapor injection enthalpy enhancement channel includes an inlet end for inputting the refrigerant from the outside. The vapor injection enthalpy enhancement channel is provided with a gas replenishment check valve, which includes a movable part. At least a portion of the movable part is configured to selectively move toward the inlet end to close the vapor injection enthalpy enhancement channel or move away from the inlet end to open the vapor injection enthalpy enhancement channel.

3. The scroll compressor according to claim 2, characterized in that, The gas replenishment check valve includes a limiting part, the movable part, and an elastic element. The two ends of the elastic element are respectively connected to the movable part and the body. The limiting part is located on the side of the movable part near the inlet end. The elastic element is deformable, and the movable part can be moved to a position that stops against the limiting part and to a position that is spaced apart.

4. The scroll compressor according to claim 2, characterized in that, The second air supply channel defines the inlet end, and the air supply check valve is provided at the inlet of the air supply check chamber.

5. The scroll compressor according to claim 4, characterized in that, The jet enthalpy enhancement channel also includes a gas replenishment buffer chamber, and the second gas replenishment channel, the gas replenishment buffer chamber, the gas replenishment check chamber, and the first gas replenishment channel are connected in sequence.

6. The scroll compressor according to claim 5, characterized in that, The gas replenishment buffer chamber includes multiple chambers, and adjacent gas replenishment buffer chambers are connected through a first conductive channel. The gas replenishment check chamber is connected to at least one of the gas replenishment buffer chambers through the gas replenishment check valve.

7. The scroll compressor according to claim 5, characterized in that, The gas replenishment check valve includes a limiting baffle, a fixed part, and a movable part. The fixed part connects the limiting baffle, the movable part, and the body. The limiting baffle blocks the inlet of the gas replenishment check chamber. The limiting baffle is provided with a third guiding channel. The movable part is located in the gas replenishment check chamber. The movable part has a first position that abuts against the limiting baffle and a second position that is at least partially spaced from the limiting baffle. When the movable part is in the first position, it blocks the third guiding channel. When the movable part is in the second position, it avoids the third guiding channel.

8. The scroll compressor according to any one of claims 4-7, characterized in that, The machine body is provided with a mounting groove, and a support cover plate is provided in the mounting groove. One side of the support cover plate abuts against the moving plate. The support cover plate is provided with a low-pressure throttling channel, and the fixed plate is provided with a high-pressure throttling channel. The low-pressure throttling channel and the high-pressure throttling channel are connected.

9. The scroll compressor according to claim 1, characterized in that, There are one or more medium-pressure chambers, and the medium-pressure chambers are spaced apart from the gas replenishment check chamber. When there are multiple medium-pressure chambers, the multiple medium-pressure chambers are connected through a fourth conductive channel.

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