Check valve assembly, compressor and air conditioner

Abstract

The check valve assembly is used for the compressor, the compressor comprises a compression cavity and an enthalpy increasing channel connected to the compression cavity, the check valve assembly is arranged in the enthalpy increasing channel, the enthalpy increasing channel can be opened or closed, the check valve assembly comprises a valve assembly, the valve assembly is provided with a movable cavity and a first through-flow opening, and the movable cavity is communicated with the first through-flow opening. The first end of the movable cavity is communicated with the enthalpy increasing channel; the valve element is movably arranged in the movable cavity and used for opening or closing the first through-flow opening; under the condition that the valve element opens the first through-flow opening, the second end of the movable cavity communicates with the enthalpy increasing channel through the first through-flow opening, and the enthalpy increasing channel is communicated and communicates with the compression cavity. And under the condition that the first through-flow opening is closed by the valve element, the first through-flow opening is cut off from the second end of the movable cavity, and the enthalpy increasing channel is cut off. And under the condition that the system is closed to supply air and increase enthalpy, the enthalpy increasing channel is cut off through the check valve assembly, so that the communicating passage between the enthalpy increasing channel and the compression cavity is cut off, the refrigerant in the compression cavity is effectively prevented from flowing back into the enthalpy increasing channel, and the energy efficiency of the compressor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valve structures, in particular to a check valve component, a compressor and an air conditioner. Background Art

[0002] At present, in the heat pump system of related technology, when it is in a low temperature or ultra-low temperature environment, the system needs to start air replenishment and enthalpy increase to improve the heating capacity of the system and avoid problems such as insufficient heating capacity and overheating of the compressor when the compressor is running under low temperature conditions.

[0003] However, under most operating conditions throughout the year, the system does not need to add air to increase enthalpy. When the system turns off the air addition and enthalpy increase function, the refrigerant in the compression chamber will flow back into the enthalpy increase passage for thermal expansion, increasing the compressor's additional compression power consumption and reducing the compressor's energy efficiency. Utility Model Content

[0004] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the utility model provides a check valve assembly.

[0006] A second aspect of an embodiment of the utility model provides a compressor.

[0007] A third aspect of the embodiments of the present utility model provides an air conditioner.

[0008] In view of this, according to the first aspect of an embodiment of the utility model, a check valve assembly is provided, the check valve assembly is used for a compressor, the compressor includes a compression chamber and an enthalpy increase channel connected to the compression chamber, the check valve assembly is arranged in the enthalpy increase channel, and can make the enthalpy increase channel open or closed, the check valve assembly includes: a valve assembly, the valve assembly is provided with an active chamber and a first flow port, the first end of the active chamber is connected to the enthalpy increase channel; a valve core is movably arranged in the active chamber, and is used to open or close the first flow port; wherein, when the valve core opens the first flow port, the second end of the active chamber is connected to the enthalpy increase channel through the first flow port, the enthalpy increase channel is opened, and is connected to the compression chamber; when the valve core closes the first flow port, the first flow port is cut off from the second end of the active chamber, and the enthalpy increase channel is cut off.

[0009] The check valve assembly provided in the embodiment of the utility model includes a valve assembly and a valve core. Specifically, the compressor includes a compression chamber and an enthalpy increase channel. It can be understood that the enthalpy increase channel also has an enthalpy increase inlet, which is used to connect to the air replenishment equipment.

[0010] It is understandable that when the compressor operates in a low temperature (below -20°C) or ultra-low temperature (below -35°C) environment, the suction pressure ratio continues to increase and the exhaust temperature rises, resulting in insufficient heat generation of the compressor and overheating of the compressor.

[0011] The check valve assembly is arranged in the enthalpy increase channel, and can make the enthalpy increase channel open or closed, so that the enthalpy increase channel is connected or closed with the compression chamber. Specifically, when the compressor is operated in a low temperature or ultra-low temperature environment, the check valve assembly makes the enthalpy increase channel open, and the enthalpy increase channel is connected with the compression chamber, that is, the enthalpy increase is increased by air supplementation through the enthalpy increase channel, thereby improving the heating capacity of the compressor when operating in a low temperature environment and preventing the compressor from overheating.

[0012] Since the compressor only needs to open the enthalpy increase channel to replenish air and increase enthalpy under low or ultra-low temperature environments, and does not need to replenish air and increase enthalpy under most working conditions throughout the year, when the compressor turns off the air replenishment and enthalpy increase, that is, when the air replenishment is stopped, if the enthalpy increase channel is not closed in time, the refrigerant in the compression chamber will flow back into the enthalpy increase channel for thermal expansion, increasing the additional compression power consumption of the compressor and reducing the energy efficiency of the compressor.

[0013] That is to say, under other working conditions except low temperature, the system closes the air supply and enthalpy increase, and cuts off the enthalpy increase channel through the check valve assembly, so that the enthalpy increase channel and the compression chamber are cut off, thereby timely cutting off the connecting path between the compression chamber and the enthalpy increase channel, significantly improving the energy efficiency of the compressor.

[0014] The valve assembly is provided with an active cavity and a first flow port, the first end of the active cavity is communicated with the enthalpy increase channel, and the valve core can move in the active cavity to open or close the first flow port.

[0015] In detail, when the compressor is operating in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy. When the introduced gas enters the first flow port, it can push the valve core in the active cavity to move to the side away from the first flow port to open the first flow port. The enthalpy increase channel is connected, and the gas enters the compression chamber through the enthalpy increase channel for replenishing air and increasing enthalpy, thereby improving the heating capacity of the compressor and preventing the compressor from overheating.

[0016] When the compressor is operating under other working conditions, the system closes the air replenishment and enthalpy increase, and the valve core moves in the active chamber to the side close to the first flow port to seal the first flow port. The enthalpy increase channel is cut off, even if the connecting path between the enthalpy increase channel and the compression chamber is cut off, thereby effectively reducing the backflow of refrigerant in the compression chamber into the enthalpy increase channel and improving the energy efficiency of the compressor.

[0017] In addition, the enthalpy increase channel can be opened or closed by the movement of the valve core in the active cavity. The structure is simple and no external force control is required. While improving the energy efficiency of the compressor, it is beneficial to reduce the manufacturing cost of the compressor.

[0018] In addition, the check valve assembly provided by the above technical solution of the utility model also has the following additional technical features:

[0019] In some technical solutions, optionally, there are multiple first flow openings, and the multiple first flow openings are arranged at intervals along the circumference of the valve assembly.

[0020] In this technical solution, the number of the first flow openings is limited to multiple. Specifically, the multiple first flow openings are arranged at intervals along the circumference of the valve assembly.

[0021] When the enthalpy-increasing channel is turned on, the gas enters the compression chamber through the enthalpy-increasing channel to increase the enthalpy of the air, thereby improving the heating capacity of the compressor and preventing the compressor from overheating. The number of the first flow openings is set to be multiple, that is, the flow area of ​​the first flow openings is increased, so that when the compressor is running in a low temperature or ultra-low temperature environment, the air replenishment efficiency can be ensured, and the heating capacity of the compressor is improved when it is running in a low temperature environment.

[0022] Optionally, the plurality of first flow openings are evenly arranged. When the system is turned on to increase enthalpy by replenishing air, the gas enters the plurality of first flow openings and pushes the valve core to move in the active cavity to a side away from the first flow openings. When the first flow openings are opened, the plurality of first flow openings are evenly arranged, so that the force on the valve core is even, thereby ensuring that the valve core can smoothly open the plurality of first flow openings, thereby ensuring that the system can smoothly replenish enthalpy by replenishing air, and facilitating the extension of the service life of the valve core.

[0023] In some technical solutions, optionally, the valve core can move axially along the valve assembly in the active cavity to open or close the first flow port; wherein, along the radial direction of the valve assembly, there is a gap between the outer wall of the valve core and the inner wall of the active cavity.

[0024] In this technical solution, the movement direction of the valve core in the active cavity is defined. Specifically, the valve core moves in the active cavity along the axial direction of the valve assembly. Optionally, the valve core can open the first flow port by moving upward in the active cavity, and can cover the first flow port by moving downward in the active cavity.

[0025] Along the radial direction of the valve assembly, there is a gap between the outer wall of the valve core and the inner wall of the active cavity, so that the valve core can move axially in the active cavity to smoothly open or cover the first flow port, thereby achieving timely conduction or blocking of the enthalpy increase channel.

[0026] In addition, since there is a gap between the outer wall of the valve core and the inner wall of the active cavity, the friction between the valve core and the inner wall of the active cavity can be reduced during the reciprocating motion of the valve core in the active cavity, thereby extending the service life of the check valve assembly and improving the stability and reliability of the compressor operation.

[0027] In some technical schemes, optionally, the enthalpy increase channel includes a first channel, the first channel includes a channel body and a vent that are connected, the valve assembly is arranged at the vent, and when the valve core opens the first flow port, the second end of the active cavity is connected to the channel body through the first flow port; wherein the flow cross-sectional area of ​​the first flow port is larger than the flow cross-sectional area of ​​the channel body.

[0028] In this technical solution, it is defined that the enthalpy increasing channel includes a first channel. Optionally, the first channel is arranged on the static scroll disk.

[0029] The first channel includes a channel body and a vent, wherein the channel body is connected to the vent, and the valve assembly is arranged at the vent. It is understandable that when the valve core moves to the side away from the first flow port to open the first flow port, the enthalpy increase channel is connected, and the gas enters the compression chamber through the channel body, the first flow port, and the active chamber in sequence to replenish gas and increase enthalpy, thereby improving the heating capacity of the compressor and preventing the compressor from overheating.

[0030] The flow cross-sectional area of ​​the first flow opening is larger than the flow cross-sectional area of ​​the channel body. When the compressor operates in a low temperature or ultra-low temperature environment and the air replenishment and enthalpy increase are turned on, it is beneficial to reduce the flow resistance of the gas, ensure the air replenishment efficiency, and thus effectively improve the heating capacity of the compressor.

[0031] In some technical schemes, optionally, the valve core is provided with a second flow port, the second flow port is connected to the active cavity, and when the valve core closes the first flow port, the second flow port is staggered with the first flow port along the axial direction of the valve assembly; wherein, the flow cross-sectional area of ​​the second flow port is larger than the flow cross-sectional area of ​​the channel body.

[0032] In this technical solution, it is specified that the valve core is provided with a second flow port. Specifically, when the system is closed to replenish air and increase enthalpy, the valve core moves to one side of the first flow port to close the first flow port. At this time, along the axial direction of the valve assembly, the second flow port is staggered with the first flow port. That is to say, there is no overlapping area between the second flow port and the first flow port in the axial direction, so that the valve core can completely close the first flow port, preventing the refrigerant in the compression chamber from flowing back through the first flow port to the channel body for thermal expansion, thereby reducing the additional compression power consumption of the compressor and improving the energy efficiency of the compressor.

[0033] When the compressor is running in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy. The gas enters the first flow port through the channel body and pushes the valve core to move to the side away from the first flow port to open the first flow port. The gas flows through the active cavity and the second flow port in turn and enters the compression cavity to replenish air and increase enthalpy, thereby improving the heating capacity of the compressor in a low temperature environment and preventing the compressor from overheating.

[0034] Since the second flow opening is located on the flow path of the gas when replenishing air to increase enthalpy, the flow cross-sectional area of ​​the second flow opening is larger than the flow cross-sectional area of ​​the channel body, which is beneficial to reducing the flow resistance of the gas when replenishing air to increase enthalpy, ensuring the air replenishment efficiency, and thus effectively improving the heating capacity of the compressor in a low temperature environment.

[0035] In some technical schemes, optionally, the enthalpy increase channel also includes a second channel, the second channel is connected to the compression chamber, and the valve assembly includes a valve body and a valve cover, wherein the valve body is provided with a third flow port, the first end of the active chamber is connected to the second channel through the third flow port, the valve cover is arranged at one end of the valve body away from the third flow port, and is enclosed with the valve body to form an active chamber, and the valve cover is provided with a first flow port; the flow cross-sectional area of ​​the third flow port is larger than the flow cross-sectional area of ​​the channel body.

[0036] In this technical solution, it is defined that the valve assembly includes a valve body and a valve cover. Specifically, the valve body is provided with a third flow port, the third flow port is communicated with the active cavity, and the second channel is communicated with the third flow port. The valve cover is arranged at one end of the valve body away from the third flow port, and the valve cover and the valve body enclose the active cavity, and the first flow port is arranged on the valve cover.

[0037] Specifically, when the compressor is operating in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy, and the gas enters the first flow port through the channel body. Since the gas has a certain pressure, the gas entering the first flow port can push the valve core to move to the side away from the first flow port to open the first flow port. The gas enters the active cavity and enters the second channel through the third flow port, and then enters the compression chamber through the second channel for replenishing air and increasing enthalpy, thereby improving the heating capacity of the compressor in a low temperature environment and preventing the compressor from overheating.

[0038] Since the third flow opening is located on the flow path of the gas when replenishing air to increase enthalpy, the flow cross-sectional area of ​​the third flow opening is larger than the flow cross-sectional area of ​​the channel body, which is beneficial to reducing the flow resistance of the gas when replenishing air to increase enthalpy, ensuring the air replenishment efficiency, and thus effectively improving the heating capacity of the compressor in a low temperature environment.

[0039] In addition, when the system is closed to increase air enthalpy, the refrigerant in the compression chamber will enter the active chamber through the third flow port and push the valve core to move to the side close to the first flow port, so that the valve core can quickly close the first flow port to further reduce the refrigerant in the compression chamber from flowing back to the channel body for thermal expansion, which is beneficial to reduce the additional compression power consumption of the compressor and improve the energy efficiency of the compressor.

[0040] In some technical solutions, optionally, the valve body is further provided with a sink groove, the sink groove is communicated with the movable cavity, and at least a part of the valve cover is arranged in the sink groove.

[0041] In this technical solution, it is defined that the valve body is also provided with a sink groove. Specifically, the sink groove is connected to the movable cavity, and at least a part of the valve cover is arranged in the sink groove, that is, the valve cover is embedded in the sink groove. On the one hand, it can improve the installation stability of the valve cover. On the other hand, it is helpful to reduce the axial height of the check valve assembly and reduce the volume of the check valve assembly. When the check valve assembly is installed to the enthalpy increase channel, it is helpful to reduce the structural size of the sealing cover arranged on the outside of the check valve assembly, thereby reducing the volume of the second channel formed by the sealing cover and the static vortex. When the system is closed for air replenishment and enthalpy increase, it is helpful to reduce the amount of refrigerant in the compression chamber that flows back to the second channel, further reducing the additional compression power consumption of the compressor and improving the energy efficiency of the compressor.

[0042] In some technical solutions, optionally, the valve body is further provided with a first limit surface, the first limit surface is located in the sink groove, and along the axial direction of the valve assembly, the valve cover abuts against the first limit surface.

[0043] In this technical solution, it is defined that the valve body is further provided with a first limit surface. Specifically, the first limit surface is arranged in the recessed groove, and along the axial direction of the valve assembly, the valve cover abuts against the first limit surface.

[0044] It can be understood that when the system is turned on to increase the heat by replenishing air, the gas entering the heat increasing channel has a certain pressure. When the gas with a certain pressure flows to the valve cover and enters the first flow port, a certain impact force will be generated. By setting the first limit surface to limit the valve cover, the installation stability of the valve cover can be effectively improved, and the valve cover can be prevented from moving into the active cavity under the impact of the air flow for a long time, resulting in the valve core being unable to fall back smoothly and seal the first flow port when the system is closed to replenish air and increase heat, thereby further improving the energy efficiency of the compressor.

[0045] In some technical solutions, optionally, the valve body is further provided with a second limit surface, the second limit surface is located in the active cavity, and when the valve core opens the first flow opening, the second limit surface can abut against the side of the valve core away from the first flow opening.

[0046] In this technical solution, it is defined that the valve body is further provided with a second limit surface. Specifically, the second limit surface is located in the active cavity.

[0047] When the valve core moves to the side away from the first flow port to open the first flow port, the second limit surface can be offset against the side of the valve core away from the first flow port. That is to say, the second limit surface can limit the valve core in the movement direction of the valve core to open the first flow port. Under the premise of ensuring that the valve core opens the first flow port, the movement path of the valve core in the active cavity is prevented from being too long. When the system is closed to replenish air and increase enthalpy, the valve core falls back and seals the first flow port, the path required for movement is too long, resulting in part of the refrigerant in the compression chamber flowing back into the channel body for thermal expansion.

[0048] It is worth noting that, when the valve core is provided with the second flow opening, when the valve core opens the first flow opening, the valve core contacts the second limit surface, and the movable chamber is connected with the third flow opening through the second flow opening.

[0049] In some technical schemes, optionally, the first limiting surface is a first annular surface, the second limiting surface is a second annular surface, and the second flow opening is a through hole axially passing through the valve core; wherein, along the axial direction of the valve assembly, the second flow opening is coaxial with at least one of the first annular surface and the second annular surface.

[0050] In this technical solution, along the axial direction of the valve assembly, the second flow opening is coaxial with the first annular surface, that is, the central axis of the second flow opening coincides with the central axis of the first annular surface. Alternatively, along the axial direction of the valve assembly, the second flow opening is coaxial with the second annular surface, that is, the central axis of the second flow opening coincides with the central axis of the second annular surface. Alternatively, along the axial direction of the valve assembly, the second flow opening, the first annular surface, and the second annular surface are coaxial, that is, the central axis of the second flow opening, the central axis of the first annular surface, and the central axis of the second annular surface coincide.

[0051] This allows the valve core to perform reciprocating motion along the axial direction of the valve assembly in the active chamber, and further when the valve core moves toward the first flow port to close the first flow port, it can ensure that the first flow port is completely closed, thereby preventing the refrigerant in the compression chamber from flowing back into the channel body through the first flow port when the system is closed to replenish air and increase enthalpy due to the valve core failing to completely close the first flow port, thereby completely cutting off the connecting path between the enthalpy increase channel and the compression chamber, thereby improving the energy efficiency of the compressor.

[0052] In some technical solutions, optionally, the outer wall of the valve core is provided with a wear-resistant layer; and / or the valve core is an elastic member.

[0053] In this technical solution, it is defined that the outer wall of the valve core is provided with a wear-resistant layer, so that the outer wall of the valve core has wear resistance, so that the wear of the valve core can be reduced during the reciprocating motion of the valve core in the active cavity, ensuring that the valve core can smoothly open or close the first flow port, so that the enthalpy increase channel is turned on or off, while extending the service life of the valve core and ensuring the stability and reliability of the compressor operation.

[0054] The valve core is an elastic member, that is, the valve core has a certain elasticity, so that when the valve core reciprocates in the active cavity, the impact between the valve core and the inner wall of the valve assembly can be reduced, thereby extending the service life of the check valve assembly.

[0055] According to a second aspect of the utility model, a compressor is provided, comprising a check valve assembly as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the check valve assembly, which will not be repeated here.

[0056] Furthermore, the compressor also includes a movable scroll, a stationary scroll and a sealing cover, wherein the stationary scroll and the movable scroll are combined to form a compression chamber, the stationary scroll is provided with a first channel and a connecting port, the check valve assembly can make the first channel open or closed, the sealing cover is arranged on the outside of the check valve assembly and is connected to the side of the stationary scroll away from the compression chamber, the sealing cover and a part of the stationary scroll are combined to form a second channel, the second channel is connected to the compression chamber through the connecting port, and when the first channel is open, the first channel is connected to the second channel, and the second channel and the first channel form an enthalpy increasing channel.

[0057] The compressor provided by the embodiment of the utility model includes a movable scroll, a fixed scroll, a sealing cover and a check valve assembly. It can be understood that the first channel has an enthalpy increase inlet, and the enthalpy increase inlet is used to connect to the air supplement equipment.

[0058] The fixed scroll and the movable scroll enclose a compression chamber, and the movable scroll can move relative to the fixed scroll. Optionally, the fixed scroll is also provided with an exhaust port, which is connected to the compression chamber, and the compressed high-temperature and high-pressure refrigerant is discharged through the exhaust port.

[0059] It is understandable that when the compressor operates in a low-temperature or ultra-low-temperature environment, the suction pressure ratio continues to increase and the exhaust temperature rises, resulting in insufficient heat generation of the compressor and overheating of the compressor.

[0060] The first channel is arranged on the fixed scroll, and the check valve assembly can make the first channel open or closed, that is, the check valve assembly is arranged on the fixed scroll. The sealing cover is arranged on the outside of the check valve assembly, and the sealing cover is connected to the side of the fixed scroll away from the compression chamber, and the sealing cover and the fixed scroll are enclosed to form a second channel, and the first channel and the second channel form an enthalpy increase channel, that is, the enthalpy increase channel includes the first channel and the second channel.

[0061] The static scroll is also provided with a connecting port, and the second channel is connected to the compression chamber through the connecting port. Specifically, when the compressor is running in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy, and the gas enters the first flow port through the first channel, and pushes the valve core to move to the side away from the first flow port to open the first flow port, so that the first flow port is connected to the active chamber, the first channel is turned on, and the first channel is connected to the second channel, that is, the gas enters the compression chamber through the first flow port, the active chamber, the second channel and the connecting port in sequence to replenish air and increase enthalpy, thereby improving the heating capacity of the compressor and preventing the compressor from overheating.

[0062] Since the compressor only needs to open the enthalpy increase channel to replenish air and increase enthalpy under low or ultra-low temperature environments, and does not need to replenish air and increase enthalpy under most working conditions throughout the year, when the compressor turns off the air replenishment and enthalpy increase, that is, when the air replenishment is stopped, if the enthalpy increase channel is not closed in time, the refrigerant in the compression chamber will flow back into the enthalpy increase channel for thermal expansion, increasing the additional compression power consumption of the compressor and reducing the energy efficiency of the compressor.

[0063] When the compressor is running under other working conditions, the system closes the air replenishment and enthalpy increase, and the valve core moves to the side close to the first flow port to close the first flow port, so that the first flow port and the active cavity are cut off, the first channel is cut off, and the first channel and the second channel are cut off, that is, the connecting path between the compression chamber and the enthalpy increase channel is cut off in time, thereby preventing the refrigerant in the compression chamber from flowing back to the first channel for thermal expansion, thereby improving the energy efficiency of the compressor.

[0064] In addition, by providing a sealing cover, the air flow passage formed when replenishing air to increase enthalpy is made into a sealed passage, thereby preventing gas leakage and ensuring the efficiency of replenishing air.

[0065] In addition, the compressor provided by the above technical solution of the utility model also has the following additional technical features:

[0066] In some technical solutions, optionally, at least a portion of the check valve assembly is disposed in the first channel.

[0067] In this technical solution, it is specified that at least part of the check valve assembly is arranged in the first channel, that is, at least part of the check valve assembly is embedded in the first channel, thereby significantly reducing the volume of the check valve assembly exposed to the static vortex disk. Compared with the related technology of arranging a reed plate and a valve seat as a check structure on the outside of the enthalpy increase port, the structural size of the sealing cover is effectively reduced, and then the volume of the clearance space formed between the sealing cover and the check valve assembly is significantly reduced, further reducing the amount of refrigerant backflowing in the compression chamber, thereby improving the energy efficiency of the compressor.

[0068] In some technical solutions, optionally, the inner wall of the first channel is sealed and connected to the valve assembly.

[0069] In this technical solution, it is defined that the inner wall of the first channel is sealed and connected to the valve assembly, that is, the outer wall of the valve assembly is sealed and connected to the inner wall of the first channel, so as to form a seal between the outer wall of the valve assembly and the inner wall of the first channel. On the one hand, the installation stability of the check valve assembly in the first channel can be improved, and the valve assembly can be prevented from escaping from the first channel under the impact of airflow when the system is replenishing air and increasing enthalpy. Furthermore, when the system closes the replenishing air and increasing enthalpy, the check valve assembly can effectively cut off the enthalpy increasing channel, thereby improving the energy efficiency of the compressor while ensuring the stability and reliability of the compressor operation.

[0070] On the other hand, when the system is closed to replenish air and increase enthalpy, it can effectively prevent the refrigerant in the compression chamber from flowing back into the first channel through the gap between the inner wall of the first channel and the valve assembly, thereby reducing the additional compression power consumption of the compressor and improving the energy efficiency of the compressor.

[0071] Optionally, the valve assembly is interference fit with an inner wall of the first passage.

[0072] Optionally, an outer wall of the valve assembly is provided with an external thread, an inner wall of the first channel has an internal thread, and the inner wall of the first channel is threadedly matched with the outer wall of the valve assembly.

[0073] Optionally, the inner wall of the first channel is riveted to the valve assembly.

[0074] Optionally, the first channel includes a channel body and a vent, and the valve assembly is disposed at the vent.

[0075] According to the third aspect of the utility model, an air conditioner is provided, comprising a check valve assembly or a compressor as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the check valve assembly or the compressor, which will not be repeated here.

[0076] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0078] Figure 1 A partial structural schematic diagram of a stationary scroll according to an embodiment of the utility model is shown;

[0079] Figure 2 An exploded view of a check valve assembly according to an embodiment of the present utility model is shown;

[0080] Figure 3 A schematic structural diagram of a valve body according to an embodiment of the utility model is shown;

[0081] Figure 4 A schematic diagram of the structure of a valve core according to an embodiment of the utility model is shown;

[0082] Figure 5 A schematic structural diagram of a valve cover according to an embodiment of the utility model is shown;

[0083] Figure 6 One of the structural schematic diagrams of a stationary scroll according to an embodiment of the utility model is shown;

[0084] Figure 7 A second structural schematic diagram of a stationary scroll according to an embodiment of the utility model is shown;

[0085] Figure 8 A schematic structural diagram of a sealing cover according to an embodiment of the utility model is shown;

[0086] Fig. 9 A schematic structural diagram of a compressor according to an embodiment of the utility model is shown.

[0087] in, Figures 1 to 9 The corresponding relationship between the reference numerals and the component names is as follows:

[0088] 100 compressor, 111 compression chamber, 113 static scroll, 114 movable scroll, 115 connecting port, 116 enthalpy increasing channel, 117 first channel, 118 channel body, 119 vent, 120 check valve assembly, 121 valve assembly, 122 movable chamber, 123 first flow port, 124 valve core, 125 second flow port, 126 valve body, 127 third flow port, 128 valve cover, 129 sink, 130 sealing cover, 150 gap, 160 first limit surface, 170 second limit surface. DETAILED DESCRIPTION

[0089] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0090] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0091] Refer to the following Figures 1 to 9 The check valve assembly 120 , the compressor 100 , and the air conditioner provided according to some embodiments of the present invention are described.

[0092] In one embodiment according to the present application, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, a check valve assembly 120 is proposed. The check valve assembly 120 is used for a compressor 100. The compressor 100 includes a compression chamber 111 and an enthalpy increase channel 116 connected to the compression chamber 111. The check valve assembly 120 is arranged in the enthalpy increase channel 116, and can make the enthalpy increase channel 116 conductive or cut off. The check valve assembly 120 includes: a valve assembly 121, the valve assembly 121 is provided with an active chamber 122 and a first flow port 123, and the first end of the active chamber 122 is communicated with the enthalpy increase channel 116; The valve core 124 is movably disposed in the active chamber 122, and is used to open or close the first flow port 123; wherein, when the valve core 124 opens the first flow port 123, the second end of the active chamber 122 is connected to the enthalpy increasing channel 116 through the first flow port 123, the enthalpy increasing channel 116 is conducted, and is connected to the compression chamber 111; when the valve core 124 closes the first flow port 123, the first flow port 123 and the second end of the active chamber 122 are cut off, and the enthalpy increasing channel 116 is cut off.

[0093] The check valve assembly 120 provided in the embodiment of the utility model includes a valve assembly 121 and a valve core 124. Specifically, the compressor 100 includes a compression chamber 111 and an enthalpy increase channel 116. It can be understood that the enthalpy increase channel 116 also has an enthalpy increase inlet, which is used to connect to the air replenishment equipment.

[0094] It is understandable that when the compressor 100 operates in a low temperature (below -20°C) or ultra-low temperature (below -35°C) environment, the suction pressure ratio continues to increase and the exhaust temperature rises, resulting in insufficient heating capacity of the compressor 100 and overheating of the compressor 100.

[0095] The check valve assembly 120 is disposed in the enthalpy increase channel 116, and can open or close the enthalpy increase channel 116, so that the enthalpy increase channel 116 is connected or closed with the compression chamber 111. Specifically, when the compressor 100 operates in a low temperature or ultra-low temperature environment, the check valve assembly 120 opens the enthalpy increase channel 116, and the enthalpy increase channel 116 is connected with the compression chamber 111, that is, the enthalpy increase channel 116 is used to increase the enthalpy, thereby improving the heating capacity of the compressor 100 when operating in a low temperature environment, and preventing the compressor 100 from overheating.

[0096] Since the compressor 100 only needs to open the enthalpy increase channel 116 to replenish air and increase enthalpy under low temperature or ultra-low temperature environments, and does not need to replenish air and increase enthalpy under most working conditions throughout the year, when the compressor 100 turns off the air replenishment and enthalpy increase, that is, stops replenishing air, if the enthalpy increase channel 116 is not closed in time, the refrigerant in the compression chamber 111 will flow back into the enthalpy increase channel 116 for thermal expansion, which increases the additional compression power consumption of the compressor 100 and reduces the energy efficiency of the compressor 100.

[0097] That is to say, under other working conditions except low temperature, the system closes the air supply and enthalpy increase, and cuts off the enthalpy increase channel 116 through the check valve assembly 120, so that the enthalpy increase channel 116 and the compression chamber 111 are cut off, thereby timely cutting off the connecting path between the compression chamber 111 and the enthalpy increase channel 116, thereby significantly improving the energy efficiency of the compressor 100.

[0098] The valve assembly 121 is provided with an active chamber 122 and a first flow port 123 . The first end of the active chamber 122 is communicated with the enthalpy increasing channel 116 . The valve core 124 can move in the active chamber 122 to open or close the first flow port 123 .

[0099] In detail, when the compressor 100 is operating in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy. When the introduced gas enters the first flow port 123, it can push the valve core 124 in the active chamber 122 to move to the side away from the first flow port 123 to open the first flow port 123, and the enthalpy increase channel 116 is connected. The gas enters the compression chamber 111 through the enthalpy increase channel 116 to replenish air and increase enthalpy, thereby improving the heating capacity of the compressor 100 and preventing the compressor 100 from overheating.

[0100] When the compressor 100 is operating under other working conditions, the system closes the air replenishment and enthalpy increase function, and the valve core 124 moves in the active chamber 122 to the side close to the first flow port 123 to seal the first flow port 123. The enthalpy increase channel 116 is cut off, even if the connecting passage between the enthalpy increase channel 116 and the compression chamber 111 is cut off, thereby effectively reducing the backflow of refrigerant in the compression chamber 111 to the enthalpy increase channel 116, thereby improving the energy efficiency of the compressor 100.

[0101] In addition, the enthalpy increase channel 116 can be opened or closed by moving the valve core 124 in the active chamber 122. The structure is simple and no external force control is required. While improving the energy efficiency of the compressor 100, it is beneficial to reduce the manufacturing cost of the compressor 100.

[0102] like Figure 5 As shown, in some embodiments, optionally, there are multiple first flow openings 123 , and the multiple first flow openings 123 are arranged at intervals along the circumference of the valve assembly 121 .

[0103] In this embodiment, the number of the first flow openings 123 is defined as plural. Specifically, the plurality of first flow openings 123 are arranged at intervals along the circumferential direction of the valve assembly 121 .

[0104] When the enthalpy increase channel 116 is turned on, the gas enters the compression chamber 111 through the enthalpy increase channel 116 to increase the enthalpy of the air, thereby improving the heating capacity of the compressor 100 and preventing the compressor 100 from overheating. The number of the first flow openings 123 is set to be multiple, that is, the flow area of ​​the first flow openings 123 is increased, so that when the compressor 100 operates in a low temperature or ultra-low temperature environment, the air replenishment efficiency can be ensured, so that the heating capacity of the compressor 100 is improved when it operates in a low temperature environment.

[0105] Optionally, the plurality of first through-flow openings 123 are evenly arranged. When the system is turned on to replenish air and increase enthalpy, the gas enters the plurality of first through-flow openings 123 and pushes the valve core 124 to move in the movable chamber 122 to the side away from the first through-flow openings 123. When the first through-flow openings 123 are opened, since the plurality of first through-flow openings 123 are evenly arranged, the force on the valve core 124 is evenly applied everywhere, thereby ensuring that the valve core 124 can smoothly open the plurality of first through-flow openings 123, thereby ensuring that the system replenishes air and increases enthalpy smoothly, and facilitating the extension of the service life of the valve core 124.

[0106] like Figure 1 As shown, in some embodiments, optionally, the valve core 124 can move axially along the valve assembly 121 in the active chamber 122 to open or close the first flow port 123; wherein, along the radial direction of the valve assembly 121, there is a gap 150 between the outer wall of the valve core 124 and the inner wall of the active chamber 122.

[0107] In this embodiment, the movement direction of the valve core 124 in the active chamber 122 is defined. Specifically, the valve core 124 moves in the active chamber 122 along the axial direction of the valve assembly 121. Optionally, the valve core 124 can open the first flow port 123 by moving upward in the active chamber 122, and can cover the first flow port 123 by moving downward in the active chamber 122.

[0108] Along the radial direction of the valve assembly 121, there is a gap 150 between the outer wall of the valve core 124 and the inner wall of the active chamber 122, so that the valve core 124 can move axially in the active chamber 122 to smoothly open or cover the first flow port 123, thereby achieving timely conduction or cutting off of the enthalpy increase channel 116.

[0109] In addition, since there is a gap 150 between the outer wall of the valve core 124 and the inner wall of the active chamber 122, the friction generated between the valve core 124 and the inner wall of the active chamber 122 can be reduced during the reciprocating motion of the valve core 124 in the active chamber 122, thereby extending the service life of the check valve assembly 120 and improving the stability and reliability of the operation of the compressor 100.

[0110] like Figure 1As shown, in some embodiments, optionally, the enthalpy increase channel 116 includes a first channel 117, the first channel 117 includes a channel body 118 and a vent 119 that are connected to each other, and the valve assembly 121 is arranged at the vent 119, and when the valve core 124 opens the first flow port 123, the second end of the active cavity 122 is connected to the channel body 118 through the first flow port 123; wherein, the flow cross-sectional area of ​​the first flow port 123 is greater than the flow cross-sectional area of ​​the channel body 118.

[0111] In this embodiment, the enthalpy increasing passage 116 is defined to include a first passage 117 . Optionally, the first passage 117 is disposed on the fixed scroll 113 .

[0112] The first channel 117 includes a channel body 118 and a vent 119, wherein the channel body 118 is in communication with the vent 119, and a valve assembly 121 is disposed at the vent 119. It is understandable that when the valve core 124 moves to a side away from the first flow port 123 to open the first flow port 123, the enthalpy increase channel 116 is connected, and the gas sequentially enters the compression chamber 111 through the channel body 118, the first flow port 123, and the active chamber 122 to supplement the gas and increase the enthalpy, thereby improving the heating capacity of the compressor 100 and preventing the compressor 100 from overheating.

[0113] The flow cross-sectional area of ​​the first flow port 123 is greater than the flow cross-sectional area of ​​the channel body 118. When the compressor 100 operates in a low temperature or ultra-low temperature environment and the air replenishment and enthalpy increase are turned on, it is beneficial to reduce the flow resistance of the gas, ensure the air replenishment efficiency, and thus effectively improve the heating capacity of the compressor 100.

[0114] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, optionally, the valve core 124 is provided with a second flow port 125, and the second flow port 125 is connected to the active chamber 122. When the valve core 124 closes the first flow port 123, the second flow port 125 is staggered with the first flow port 123 along the axial direction of the valve assembly 121; wherein, the flow cross-sectional area of ​​the second flow port 125 is larger than the flow cross-sectional area of ​​the channel body 118.

[0115] In this embodiment, it is defined that the valve core 124 is provided with a second flow port 125. Specifically, when the system is closed for air replenishment and enthalpy increase, the valve core 124 moves to one side of the first flow port 123 to close the first flow port 123. At this time, along the axial direction of the valve assembly 121, the second flow port 125 is staggered with the first flow port 123, that is, there is no overlapping area between the second flow port 125 and the first flow port 123 in the axial direction, so that the valve core 124 can completely close the first flow port 123, preventing the refrigerant in the compression chamber 111 from flowing back through the first flow port 123 to the channel body 118 for thermal expansion, thereby reducing the additional compression power consumption of the compressor 100 and improving the energy efficiency of the compressor 100.

[0116] When the compressor 100 is operating in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy. The gas enters the first flow port 123 through the channel body 118 and pushes the valve core 124 to move to the side away from the first flow port 123 to open the first flow port 123. The gas flows through the active cavity 122 and the second flow port 125 in turn and enters the compression cavity 111 to replenish air and increase enthalpy, thereby improving the heating capacity of the compressor 100 in a low temperature environment and preventing the compressor 100 from overheating.

[0117] Since the second flow opening 125 is located on the flow path of the gas when replenishing air to increase enthalpy, the flow cross-sectional area of ​​the second flow opening 125 is larger than the flow cross-sectional area of ​​the channel body 118, which is beneficial to reducing the flow resistance of the gas when replenishing air to increase enthalpy, ensuring the air replenishment efficiency, and thus effectively improving the heating capacity of the compressor 100 in a low temperature environment.

[0118] Optionally, the cross-sectional shape of the valve core 124 is annular.

[0119] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, the enthalpy increase channel 116 also includes a second channel, the second channel is connected to the compression chamber 111, and the valve assembly 121 includes a valve body 126 and a valve cover 128, wherein the valve body 126 is provided with a third flow port 127, the first end of the active chamber 122 is connected to the second channel through the third flow port 127, the valve cover 128 is provided at one end of the valve body 126 away from the third flow port 127, and is enclosed with the valve body 126 to form the active chamber 122, and the valve cover 128 is provided with a first flow port 123; the flow cross-sectional area of ​​the third flow port 127 is larger than the flow cross-sectional area of ​​the channel body 118.

[0120] In this embodiment, the valve assembly 121 is defined to include a valve body 126 and a valve cover 128. Specifically, the valve body 126 is provided with a third flow port 127, the third flow port 127 is communicated with the active cavity 122, and the second channel is communicated with the third flow port 127. The valve cover 128 is provided at one end of the valve body 126 away from the third flow port 127, and the valve cover 128 and the valve body 126 enclose the active cavity 122, and the first flow port 123 is provided on the valve cover 128.

[0121] Specifically, when the compressor 100 is operating in a low temperature or ultra-low temperature environment, the system starts to replenish air and increase enthalpy, and the gas enters the first flow port 123 through the channel body 118. Since the gas has a certain pressure, the gas entering the first flow port 123 can push the valve core 124 to move to the side away from the first flow port 123 to open the first flow port 123. The gas enters the active cavity 122 and enters the second channel through the third flow port 127, and then enters the compression chamber 111 through the second channel to replenish air and increase enthalpy, thereby improving the heating capacity of the compressor 100 in a low temperature environment and preventing the compressor 100 from overheating.

[0122] Since the third flow opening 127 is located on the flow path of the gas when replenishing air to increase enthalpy, the flow cross-sectional area of ​​the third flow opening 127 is larger than the flow cross-sectional area of ​​the channel body 118, which is beneficial to reducing the flow resistance of the gas when replenishing air to increase enthalpy, ensuring the air replenishment efficiency, and thus effectively improving the heating capacity of the compressor 100 in a low temperature environment.

[0123] In addition, when the system is closed to increase air enthalpy, the refrigerant in the compression chamber 111 will enter the active chamber 122 through the third flow port 127, and push the valve core 124 to move to the side close to the first flow port 123, so that the valve core 124 can quickly close the first flow port 123, so as to further reduce the refrigerant in the compression chamber 111 from flowing back to the channel body 118 for thermal expansion, which is beneficial to reduce the additional compression power consumption of the compressor 100 and improve the energy efficiency of the compressor 100.

[0124] Optionally, the cross-sectional shape of the valve cover 128 is circular.

[0125] like Figure 1 and Figure 3 As shown, in some embodiments, optionally, the valve body 126 is further provided with a sink 129 , the sink 129 is communicated with the active chamber 122 , and at least a portion of the valve cover 128 is disposed in the sink 129 .

[0126] In this embodiment, it is defined that the valve body 126 is also provided with a sink 129. Specifically, the sink 129 is communicated with the active chamber 122, and at least a part of the valve cover 128 is arranged in the sink 129, that is, the valve cover 128 is embedded in the sink 129. On the one hand, the installation stability of the valve cover 128 can be improved. On the other hand, it is conducive to reducing the height of the check valve assembly 120 in the axial direction and reducing the volume of the check valve assembly 120. When the check valve assembly 120 is installed in the enthalpy increase channel 116, it is conducive to reducing the structural size of the sealing cover 130 covered on the outside of the check valve assembly 120, thereby reducing the volume of the second channel formed by the sealing cover 130 and the static scroll 113. When the system is closed for air replenishment and enthalpy increase, it is conducive to reducing the amount of refrigerant in the compression chamber 111 that flows back to the second channel, further reducing the additional compression power consumption of the compressor 100, and improving the energy efficiency of the compressor 100.

[0127] like Figure 1 and Figure 3 As shown, in some embodiments, optionally, the valve body 126 is further provided with a first limiting surface 160 , and the first limiting surface 160 is located in the recessed groove 129 , and along the axial direction of the valve assembly 121 , the valve cover 128 abuts against the first limiting surface 160 .

[0128] In this embodiment, it is defined that the valve body 126 is further provided with a first limiting surface 160 . Specifically, the first limiting surface 160 is provided in the recessed groove 129 , and along the axial direction of the valve assembly 121 , the valve cover 128 abuts against the first limiting surface 160 .

[0129] It can be understood that when the system is turned on to increase the heat by replenishing air, the gas entering the heat increasing channel 116 has a certain pressure. When the gas with a certain pressure flows to the valve cover 128 and enters the first flow port 123, a certain impact force will be generated. By setting the first limiting surface 160 to limit the valve cover 128, the installation stability of the valve cover 128 can be effectively improved, and the valve cover 128 can be prevented from moving into the active cavity 122 under the impact of the air flow for a long time, resulting in the valve core 124 being unable to smoothly fall back and seal the first flow port 123 when the system is closed to replenish air and increase heat, thereby further improving the energy efficiency of the compressor 100.

[0130] like Figure 1 and Figure 3 As shown, in some embodiments, optionally, the valve body 126 is further provided with a second limit surface 170, and the second limit surface 170 is located in the active cavity 122. When the valve core 124 opens the first flow opening 123, the second limit surface 170 can abut against the side of the valve core 124 away from the first flow opening 123.

[0131] In this embodiment, it is defined that the valve body 126 is further provided with a second limiting surface 170 . Specifically, the second limiting surface 170 is located in the active cavity 122 .

[0132] When the valve core 124 moves to the side away from the first flow port 123 to open the first flow port 123, the second limit surface 170 can be offset against the side of the valve core 124 away from the first flow port 123. That is to say, the second limit surface 170 can limit the valve core 124 in the movement direction of the valve core 124 to open the first flow port 123. Under the premise of ensuring that the valve core 124 opens the first flow port 123, the movement path of the valve core 124 in the active chamber 122 is prevented from being too long. When the system is closed to replenish air and increase enthalpy, the valve core 124 falls back and covers the first flow port 123, the required movement path is too long, causing part of the refrigerant in the compression chamber 111 to flow back into the channel body 118 for thermal expansion.

[0133] It is worth noting that, when the valve core 124 is provided with the second flow opening 125 , when the valve core 124 opens the first flow opening 123 , the valve core 124 contacts the second limit surface 170 , and the active chamber 122 is connected with the third flow opening 127 through the second flow opening 125 .

[0134] It is worth noting that the axial ratio of the valve core 124 floating up and down in the valve body 126 of 1%-100% falls within the protection scope of the present application.

[0135] In some embodiments, optionally, the first limiting surface 160 is a first annular surface, the second limiting surface 170 is a second annular surface, and the second flow opening 125 is a through hole axially passing through the valve core 124; wherein, along the axial direction of the valve assembly 121, the second flow opening 125 is coaxial with at least one of the first annular surface and the second annular surface.

[0136] In this embodiment, along the axial direction of the valve assembly 121, the second flow opening 125 is coaxial with the first annular surface, that is, the central axis of the second flow opening 125 coincides with the central axis of the first annular surface. Alternatively, along the axial direction of the valve assembly 121, the second flow opening 125 is coaxial with the second annular surface, that is, the central axis of the second flow opening 125 coincides with the central axis of the second annular surface. Alternatively, along the axial direction of the valve assembly 121, the second flow opening 125, the first annular surface, and the second annular surface are coaxial, that is, the central axis of the second flow opening 125, the central axis of the first annular surface, and the central axis of the second annular surface coincide.

[0137] Thereby, the valve core 124 can reciprocate in the active chamber 122 along the axial direction of the valve assembly 121, and further when the valve core 124 moves toward the first flow port 123 to close the first flow port 123, it can ensure that the first flow port 123 is completely closed, thereby preventing the refrigerant in the compression chamber 111 from flowing back into the channel body 118 through the first flow port 123 when the system is closed to replenish air and increase enthalpy due to the valve core 124 failing to completely close the first flow port 123, thereby completely cutting off the connecting passage between the enthalpy increase channel 116 and the compression chamber 111, thereby improving the energy efficiency of the compressor 100.

[0138] In some embodiments, optionally, the outer wall of the valve core 124 is provided with a wear-resistant layer; and / or the valve core 124 is an elastic member.

[0139] In this embodiment, it is defined that the outer wall of the valve core 124 is provided with a wear-resistant layer, so that the outer wall of the valve core 124 has wear resistance, so that the wear of the valve core 124 can be reduced during the reciprocating motion of the valve core 124 in the active chamber 122, ensuring that the valve core 124 can smoothly open or close the first flow port 123, so that the enthalpy increase channel 116 is turned on or off, while extending the service life of the valve core 124, ensuring the stability and reliability of the operation of the compressor 100.

[0140] The valve core 124 is an elastic member, that is, the valve core 124 itself has a certain elasticity, so that when the valve core 124 reciprocates in the active chamber 122, the impact between the valve core 124 and the inner wall of the valve assembly 121 can be reduced, thereby extending the service life of the check valve assembly 120.

[0141] According to a second aspect of the present invention, a compressor 100 is provided, comprising a check valve assembly 120 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the check valve assembly 120, which will not be described in detail herein.

[0142] like Figure 1 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, further, the compressor 100 also includes a movable scroll 114, a fixed scroll 113 and a sealing cover 130, wherein the fixed scroll 113 and the movable scroll 114 enclose a compression chamber 111, the fixed scroll 113 is provided with a first channel 117 and a connecting port 115, the check valve assembly 120 can make the first channel 117 open or closed, the sealing cover 130 is covered on the outside of the check valve assembly 120, and is connected to the side of the fixed scroll 113 away from the compression chamber 111, the sealing cover 130 and a part of the fixed scroll 113 enclose a second channel, the second channel is connected to the compression chamber 111 through the connecting port 115, when the first channel 117 is open, the first channel 117 is connected to the second channel, and the second channel and the first channel 117 form an enthalpy increase channel 116.

[0143] The compressor 100 provided in the embodiment of the present invention includes a movable scroll 114, a fixed scroll 113, a sealing cover 130 and a check valve assembly 120. It can be understood that the first channel 117 has an enthalpy increase inlet, which is used to connect to the air supplement equipment.

[0144] The fixed scroll 113 and the movable scroll 114 enclose a compression chamber 111, and the movable scroll 114 can translate relative to the fixed scroll 113. Optionally, the fixed scroll 113 is further provided with an exhaust port, which is communicated with the compression chamber 111, and the compressed high-temperature and high-pressure refrigerant is discharged through the exhaust port.

[0145] It is understandable that when the compressor 100 operates in a low temperature or ultra-low temperature environment, the suction pressure ratio continues to increase and the exhaust temperature rises, resulting in insufficient heating capacity of the compressor 100 and overheating of the compressor 100.

[0146] The first channel 117 is provided on the fixed scroll 113, and the check valve assembly 120 can open or close the first channel 117, that is, the check valve assembly 120 is provided on the fixed scroll 113. The sealing cover 130 is provided on the outside of the check valve assembly 120, and the sealing cover 130 is connected to the side of the fixed scroll 113 away from the compression chamber 111, and the sealing cover 130 and the fixed scroll 113 are enclosed to form a second channel, and the first channel 117 and the second channel form an enthalpy increase channel 116, that is, the enthalpy increase channel 116 includes the first channel 117 and the second channel.

[0147] The stationary scroll 113 is also provided with a connecting port 115, and the second channel is connected to the compression chamber 111 through the connecting port 115. Specifically, when the compressor 100 is operated in a low temperature or ultra-low temperature environment, the system starts to supplement air and increase enthalpy, and the gas enters the first flow port 123 through the first channel 117, and pushes the valve core 124 to move to the side away from the first flow port 123 to open the first flow port 123, so that the first flow port 123 is connected to the active chamber 122, the first channel 117 is turned on, and the first channel 117 is connected to the second channel, that is, the gas enters the compression chamber 111 through the first flow port 123, the active chamber 122, the second channel and the connecting port 115 in sequence to supplement air and increase enthalpy, thereby improving the heating capacity of the compressor 100 and preventing the compressor 100 from overheating.

[0148] Since the compressor 100 only needs to open the enthalpy increase channel 116 to replenish air and increase enthalpy under low temperature or ultra-low temperature environments, and does not need to replenish air and increase enthalpy under most working conditions throughout the year, when the compressor 100 turns off the air replenishment and enthalpy increase, that is, stops replenishing air, if the enthalpy increase channel 116 is not closed in time, the refrigerant in the compression chamber 111 will flow back into the enthalpy increase channel 116 for thermal expansion, which increases the additional compression power consumption of the compressor 100 and reduces the energy efficiency of the compressor 100.

[0149] When the compressor 100 is operating under other working conditions, the system closes the air replenishment and enthalpy increase, and the valve core 124 moves to the side close to the first flow port 123 to close the first flow port 123, so that the first flow port 123 and the active chamber 122 are cut off, the first channel 117 is cut off, and the first channel 117 and the second channel are cut off, that is, the connecting passage between the compression chamber 111 and the enthalpy increase channel 116 is cut off in time, so as to avoid the refrigerant in the compression chamber 111 from flowing back to the first channel 117 for thermal expansion, thereby improving the energy efficiency of the compressor 100.

[0150] In addition, by providing the sealing cover 130, the air flow passage formed when replenishing the gas to increase the enthalpy is a sealed passage, thereby preventing gas leakage and ensuring the efficiency of replenishing the gas.

[0151] In a specific embodiment, the related art uses a reed and a valve seat as a check structure, but due to the large size of the reed and the valve seat structure, a larger sealing cover is required. When the system is closed to increase enthalpy, there is 1801.79mm in the entire sealing cavity. 3 The refrigerant in the compression chamber will flow back into the gap chamber of the enthalpy increase passage for thermal expansion, resulting in additional compression power consumption. Using the check valve assembly 120 defined in this application, the gap volume is 343.07mm 3 , that is, the clearance volume is reduced by 80.9%, and the APF (Annual Performance Factor, energy efficiency ratio) is increased by 0.4%-0.8%.

[0152] A jet enthalpy increase check structure (check valve assembly 120), the check structure is installed at the enthalpy increase outlet (air vent 119) of the fixed scroll (fixed scroll 113), which can effectively prevent the gas (refrigerant) in the scroll compressor (compressor 100) cavity (compression chamber 111) from backflowing into the enthalpy increase pipe (first channel 117), while reducing the clearance volume.

[0153] The enthalpy increase check assembly (check valve assembly 120) includes a valve seat (valve body 126), a valve plate (valve core 124) and a cover plate (valve cover 128), and the valve seat is provided with a first limiting portion (first limiting surface 160) and a second limiting portion (second limiting surface 170), and a valve cavity (active cavity 122) connecting the first limiting portion and the second limiting portion.

[0154] The valve plate is arranged in the valve cavity, and there is a gap 150 between the valve plate and the peripheral wall of the valve cavity. The valve plate has a hole in the center (the second flow opening 125). When the enthalpy increase is turned on, the valve plate floats upward to allow gas to pass through, and the valve plate contacts the second limit portion. When the enthalpy increase is closed, the valve plate floats downward under the thrust of the gas in the compression chamber 111, and is tightly attached to the cover plate (valve cover 128) to achieve sealing, thereby preventing the gas in the compression chamber 111 from flowing back into the enthalpy increase tube (the first channel 117).

[0155] The cover plate (valve cover 128) is arranged at the first limiting portion, and a hollow hole (first flow opening 123) is arranged on the cover plate and passes through both sides.

[0156] like Figure 1 and Figure 6 As shown, in some embodiments, optionally, at least a portion of the check valve assembly 120 is disposed within the first passage 117 .

[0157] In this embodiment, it is defined that at least a portion of the check valve assembly 120 is disposed in the first channel 117, that is, at least a portion of the check valve assembly 120 is embedded in the first channel 117, thereby significantly reducing the volume of the check valve assembly 120 exposed from the static vortex 113. Compared with the related art in which a reed plate and a valve seat are disposed on the outer side of the enthalpy increase port as a check structure, the structural size of the sealing cover 130 is effectively reduced, thereby significantly reducing the volume of the clearance space formed between the sealing cover 130 and the check valve assembly 120, further reducing the amount of refrigerant backflowing in the compression chamber 111, and improving the energy efficiency of the compressor 100.

[0158] In some embodiments, optionally, the inner wall of the first channel 117 is sealed and connected to the valve assembly 121 .

[0159] In this embodiment, the inner wall of the first channel 117 is sealedly connected to the valve assembly 121, that is, the outer wall of the valve assembly 121 is sealedly connected to the inner wall of the first channel 117, so that a seal is formed between the outer wall of the valve assembly 121 and the inner wall of the first channel 117. On the one hand, the installation stability of the check valve assembly 120 in the first channel 117 can be improved, and the valve assembly 121 can be prevented from escaping from the first channel 117 under the impact of airflow when the system is replenishing air and increasing enthalpy. Further, when the system closes the replenishing air and increasing enthalpy, the check valve assembly 120 can effectively cut off the enthalpy increasing channel 116, thereby improving the energy efficiency of the compressor 100 and ensuring the stability and reliability of the operation of the compressor 100.

[0160] On the other hand, when the system is closed to replenish air and increase enthalpy, it can effectively prevent the refrigerant in the compression chamber 111 from flowing back into the first channel 117 through the gap between the inner wall of the first channel 117 and the valve assembly 121, thereby reducing the additional compression power consumption of the compressor 100 and improving the energy efficiency of the compressor 100.

[0161] Optionally, the valve assembly 121 is interference fit with the inner wall of the first channel 117 .

[0162] Optionally, an outer wall of the valve assembly 121 is provided with an outer thread, an inner wall of the first channel 117 is provided with an inner thread, and the inner wall of the first channel 117 is threadedly matched with the valve assembly 121 .

[0163] Optionally, the inner wall of the first channel 117 is riveted to the valve assembly 121 .

[0164] Optionally, the first channel 117 includes a channel body 118 and a vent 119 , and the valve assembly 121 is disposed at the vent 119 .

[0165] According to the third aspect of the utility model, an air conditioner is provided, comprising a check valve assembly 120 or a compressor 100 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the check valve assembly 120 or the compressor 100, which will not be repeated here.

[0166] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0167] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0168] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A check valve assembly, characterized in that: The check valve assembly is used for a compressor, the compressor includes a compression chamber and an enthalpy increase channel connected to the compression chamber, the check valve assembly is arranged in the enthalpy increase channel, and can make the enthalpy increase channel open or closed, the check valve assembly includes: A valve assembly, wherein the valve assembly is provided with an active cavity and a first flow opening, and a first end of the active cavity is communicated with the enthalpy increasing channel; A valve core is movably disposed in the movable chamber and is used to open or close the first flow opening; Wherein, when the valve core opens the first flow port, the second end of the active chamber is connected to the enthalpy increasing channel through the first flow port, and the enthalpy increasing channel is connected and connected to the compression chamber; When the valve core closes the first flow opening, the first flow opening is cut off from the second end of the active chamber, and the enthalpy increasing channel is cut off.

2. The check valve assembly according to claim 1, characterized in that: There are multiple first flow openings, and the multiple first flow openings are arranged at intervals along the circumference of the valve assembly.

3. The check valve assembly according to claim 1, characterized in that: The valve core can move in the movable chamber along the axial direction of the valve assembly to open or close the first flow port; Wherein, along the radial direction of the valve assembly, there is a gap between the outer wall of the valve core and the inner wall of the active chamber.

4. The check valve assembly according to any one of claims 1 to 3, characterized in that: The enthalpy increase channel includes a first channel, the first channel includes a channel body and a vent that are connected, the valve assembly is arranged at the vent, and when the valve core opens the first flow port, the second end of the active cavity is connected to the channel body through the first flow port; Wherein, a flow cross-sectional area of ​​the first flow opening is larger than a flow cross-sectional area of ​​the channel body.

5. The check valve assembly according to claim 4, characterized in that: The valve core is provided with a second flow opening, the second flow opening is communicated with the active cavity, and when the valve core closes the first flow opening, the second flow opening is staggered with the first flow opening along the axial direction of the valve assembly; Wherein, a flow cross-sectional area of ​​the second flow opening is larger than a flow cross-sectional area of ​​the channel body.

6. The check valve assembly according to claim 5, characterized in that The enthalpy-increasing channel further includes a second channel, the second channel being in communication with the compression chamber, and the valve assembly includes: a valve body, wherein the valve body is provided with a third flow opening, and the first end of the movable chamber is connected with the second channel through the third flow opening; a valve cover, which is arranged at one end of the valve body away from the third flow opening and is enclosed with the valve body to form the active cavity, and the valve cover is provided with the first flow opening; Wherein, the flow cross-sectional area of ​​the third flow opening is larger than the flow cross-sectional area of ​​the channel body.

7. The check valve assembly according to claim 6, characterized in that The valve body is further provided with a sink groove, the sink groove is communicated with the active cavity, and at least a part of the valve cover is arranged in the sink groove.

8. The check valve assembly according to claim 7, characterized in that The valve body is further provided with a first limiting surface, which is located in the sink groove. Along the axial direction of the valve assembly, the valve cover abuts against the first limiting surface.

9. The check valve assembly according to claim 8, characterized in that The valve body is further provided with a second limit surface, which is located in the active cavity. When the valve core opens the first flow opening, the second limit surface can abut against a side of the valve core away from the first flow opening.

10. The check valve assembly according to claim 9, characterized in that The first limiting surface is a first annular surface, the second limiting surface is a second annular surface, and the second flow opening is a through hole axially penetrating the valve core; Wherein, along the axial direction of the valve assembly, the second flow opening is coaxial with at least one of the first annular surface and the second annular surface.

11. The check valve assembly according to any one of claims 1 to 3, characterized in that: The outer wall of the valve core is provided with a wear-resistant layer; and / or the valve core is an elastic member.

12. A compressor, characterized in that: include: The check valve assembly according to any one of claims 1 to 11; Moving scroll; A fixed scroll, enclosing a compression chamber with the movable scroll, the fixed scroll is provided with a first passage and a communication port, and the check valve assembly can open or close the first passage; A sealing cover is arranged on the outside of the check valve assembly and is connected to the side of the static vortex away from the compression chamber. The sealing cover and a part of the static vortex are enclosed to form a second channel. The second channel is connected to the compression chamber through the connecting port. When the first channel is connected, the first channel is connected to the second channel, and the second channel and the first channel form the enthalpy increasing channel.

13. The compressor according to claim 12, characterized in that At least a portion of the check valve assembly is disposed within the first passage.

14. The compressor according to claim 12 or 13, characterized in that The inner wall of the first passage is sealedly connected to the valve assembly.

15. An air conditioner, characterized in that: include: The check valve assembly according to any one of claims 1 to 11; or A compressor as claimed in any one of claims 12 to 14.

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