Heat dissipation system, air conditioner outdoor unit and air conditioner

Abstract

The utility model provides a heat dissipation system, an air conditioner outdoor unit and an air conditioner, the heat dissipation system comprises a compressor assembly, a main heat exchange throttling assembly and a supercooling heat exchanger which are connected in sequence, and the compressor assembly is used for being connected with a refrigerant outlet of an indoor unit through a first pipeline; the outflow end of the enthalpy spraying main pipeline is connected with an air suction port of a compressor of the compressor assembly. A first pipe section, a first connecting point and a second connecting point which are in contact with the power module are sequentially arranged on a connecting pipeline between the main heat exchange throttling assembly and the supercooling heat exchanger; the inlet end of the enthalpy spraying main pipeline is connected with the second connecting point; the supercooling throttling element, the fourth connecting point, the supercooling heat exchanger and the third connecting point are sequentially arranged on the enthalpy spraying main pipeline; the inlet end of the heat dissipation pipeline is connected with the first connecting point or the fourth connecting point, and the outlet end of the heat dissipation pipeline is connected with the first pipeline and / or the third connecting point; and the heat dissipation pipeline is in contact with the power module. The actual heat exchange amount of the power module is adjusted by opening or cutting off the heat dissipation pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, and in particular to a heat dissipation system, an air conditioning outdoor unit and an air conditioner. Background Art

[0002] In conventional power module heat dissipation arrangements, a portion of the connecting pipe between the heat exchange throttling assembly and the subcooling heat exchanger (through which the low-temperature refrigerant flows) is built into the power module. This allows the low-temperature refrigerant to exchange heat with the power module, allowing the refrigerant to remove heat generated by the power module, thereby achieving a cooling effect on the power module. The heat exchange throttling assembly includes a condenser and an expansion valve.

[0003] Conventional power module heat dissipation layout has the following problems:

[0004] 1. The refrigerant flow rate flowing into the pipe section built into the power module is always equal to the refrigerant flow rate in the main flow path, and cannot be adjusted to the required heat exchange of the power module. If the main flow rate is too low or the temperature is too high, the heat dissipation effect on the power module will be poor; and excessive power module temperature can cause malfunction.

[0005] 2. After the refrigerant in the pipe section built into the power module absorbs the heat of the power module, the refrigerant temperature rises, which will reduce the cooling effect of the system. This problem is particularly serious when the heat generated by the power module is large. Utility Model Content

[0006] The main purpose of the utility model is to provide a heat dissipation system, an air-conditioning outdoor unit and an air conditioner, so as to solve the problem that the power module heat dissipation method in the prior art cannot adjust the actual heat exchange amount of the power module according to the heat exchange amount required by the power module.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a heat dissipation system is provided, which includes a power module, an enthalpy spray main line, and a compressor assembly, a main heat exchange throttling assembly, and a subcooling heat exchanger connected in sequence. The compressor assembly is used to be connected to the refrigerant outlet of the indoor unit of the air conditioner through a first pipeline, and the subcooling heat exchanger is used to be connected to the refrigerant inlet of the indoor unit; the connecting pipeline between the main heat exchange throttling assembly and the subcooling heat exchanger includes a first pipe section in contact with the power module to cool the power module; the outflow end of the enthalpy spray main line is connected to the air intake of the compressor of the compressor assembly; the connecting pipeline between the main heat exchange throttling assembly and the subcooling heat exchanger is provided with a first connection point and a second connection point. The first connection point is located upstream of the second connection point and downstream of the first pipe section; the inlet end of the enthalpy spray main line is connected to the second connection point, and the enthalpy spray main line is provided with an overcooling throttling device, a third connection point and a fourth connection point. The enthalpy spray main line passes through the overcooling heat exchanger, and the overcooling heat exchanger is located downstream of the overcooling throttling device and upstream of the third connection point; the fourth connection point is located between the overcooling throttling device and the overcooling heat exchanger; the heat dissipation system also includes a heat dissipation pipeline, the inlet end of the heat dissipation pipeline is connected to the first connection point or the fourth connection point, and the outflow end of the heat dissipation pipeline is connected to the first pipeline and / or the third connection point; the heat dissipation pipeline includes a second pipe section in contact with the power module to cool the power module.

[0008] Furthermore, the compressor assembly includes a gas-liquid separator, a compressor and an oil separator connected in sequence.

[0009] Furthermore, the main heat exchange throttling assembly includes a main heat exchanger and a main throttling element connected in sequence.

[0010] Furthermore, when the inlet end of the heat dissipation pipeline is connected to the first connection point, a preset throttling component is provided on the heat dissipation pipeline, and the preset throttling component is located upstream of the second pipe section.

[0011] Furthermore, a regulating valve is provided on the heat dissipation pipeline to control the on-off of the heat dissipation pipeline and adjust the flow of refrigerant in the heat dissipation pipeline; the regulating valve is located upstream of the second pipe section.

[0012] Furthermore, when the inlet end of the heat dissipation pipeline is connected to the first connection point, a preset throttling component is provided on the heat dissipation pipeline, and the preset throttling component serves as a regulating valve.

[0013] Furthermore, a fifth connection point is provided on the enthalpy spray main line, and the fifth connection point is located between the subcooling heat exchanger and the third connection point; the heat dissipation system also includes an enthalpy spray branch line, and the inlet end of the enthalpy spray branch line is connected to the fifth connection point; a sixth connection point and a seventh connection point are provided on the first line, and the sixth connection point is located upstream of the seventh connection point; the outflow end of the heat dissipation line is used to connect to the sixth connection point to connect to the first line; the outflow end of the enthalpy spray branch line is connected to the seventh connection point; the enthalpy spray branch line can be set to be on and off.

[0014] Furthermore, the heat dissipation system also includes a four-way valve, and the pipeline between the compressor assembly and the main heat exchange throttling assembly is connected through a communication path of the four-way valve; the first pipeline is connected through another communication path of the four-way valve.

[0015] Furthermore, the heat dissipation pipeline includes a heat dissipation main pipe section and two heat dissipation branch pipe sections; the inlet end of the heat dissipation main pipe section is connected to the first connection point; the inlet ends of the two heat dissipation branch pipe sections are both connected to the outflow end of the heat dissipation main pipe section, the outflow end of one heat dissipation branch pipe section is connected to the first pipeline, and the outflow end of the other heat dissipation branch pipe section is connected to the third connection point; both heat dissipation branch pipe sections can be set to be on and off; the heat dissipation main pipe section includes a second pipe section, and a preset throttling component is provided on the heat dissipation main pipe section, and the preset throttling component is located upstream of the second pipe section.

[0016] According to another aspect of the present invention, an air-conditioning outdoor unit is provided, which includes the above-mentioned heat dissipation system.

[0017] According to another aspect of the present invention, an air conditioner is provided, which includes the above-mentioned air conditioner outdoor unit.

[0018] Applying the technical solution of the present invention, the heat dissipation system includes a compressor assembly, a main heat exchange throttling assembly, and a subcooling heat exchanger connected in sequence. The compressor assembly is used to be connected to the refrigerant outlet of the indoor unit of the air conditioner through a first pipeline, and the subcooling heat exchanger is used to be connected to the refrigerant inlet of the indoor unit.

[0019] The heat dissipation system also includes a power module, and the connecting pipeline between the main heat exchange throttling component and the supercooling heat exchanger includes a first pipe section in contact with the power module, so as to cool the power module through the first pipe section.

[0020] A first connection point and a second connection point are provided on the connecting pipeline between the main heat exchange throttling component and the subcooling heat exchanger; the first connection point is located upstream of the second connection point, and the first connection point is located downstream of the first pipe section.

[0021] The heat dissipation system also includes a spray enthalpy main line, the inlet end of the spray enthalpy main line is connected to the second connection point, and the outlet end of the spray enthalpy main line is connected to the suction port of the compressor of the compressor assembly; the spray enthalpy main line is provided with a subcooling throttling device, a third connection point and a fourth connection point; the spray enthalpy main line passes through a subcooling heat exchanger; the subcooling heat exchanger is located downstream of the subcooling throttling device, and the subcooling heat exchanger is located upstream of the third connection point; the fourth connection point is located between the subcooling throttling device and the subcooling heat exchanger.

[0022] The heat dissipation system also includes a heat dissipation pipeline, the inlet end of the heat dissipation pipeline is connected to the first connection point or the fourth connection point; the outlet end of the heat dissipation pipeline is connected to the first pipeline and / or the third connection point; the heat dissipation pipeline includes a second pipe section in contact with the power module, so as to cool the power module through the second pipe section.

[0023] When the power module generates a large amount of heat, the first pipe section and the second pipe section are both in a connected state, so that the first pipe section and the second pipe section jointly cool the power module. The first pipe section and the second pipe section jointly bear the heat dissipation load, thereby improving the heat dissipation efficiency of the power module and enhancing the heat dissipation effect of the power module.

[0024] When the heat generated by the power module is relatively small, the heat dissipation pipeline is disconnected, and the power module is cooled only by the first pipe section.

[0025] The heat dissipation system of the present application can open or cut off the heat dissipation pipeline according to the heat exchange amount required by the power module, thereby adjusting the actual heat exchange amount of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 FIG2 shows a schematic structural diagram of a heat dissipation system according to a first embodiment of the present utility model;

[0028] Figure 2 FIG2 shows a schematic structural diagram of a heat dissipation system according to a second embodiment of the present utility model;

[0029] Figure 3 FIG2 shows a schematic structural diagram of a heat dissipation system according to a third embodiment of the present invention;

[0030] Figure 4 A structural schematic diagram of a heat dissipation system according to a fourth embodiment of the present utility model is shown.

[0031] The above drawings include the following reference numerals:

[0032] 11. Compressor; 12. Gas-liquid separator; 13. Oil separator;

[0033] 21. Main heat exchanger; 22. Main throttling element; 30. Power module;

[0034] 41. Subcooling heat exchanger; 42. Subcooling throttling element; 51. Third control valve; 52. Four-way valve;

[0035] 60, heat dissipation pipeline; 600, second pipe section; 601, heat dissipation main pipe section; 602, heat dissipation branch pipe section; 6021, second control valve; 61, preset throttling assembly; 62, first control valve;

[0036] 71, first pipeline; 711, sixth connection point; 712, seventh connection point; 721, first pipe section; 722, first connection point; 723, second connection point; 731, spray enthalpy main pipeline; 732, spray enthalpy branch pipeline;

[0037] 811, third connection point; 812, fourth connection point; 813, fifth connection point. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] This utility model provides a heat dissipation system, please refer to Figures 1 to 4 The heat dissipation system includes a compressor assembly, a main heat exchange throttling assembly, and a subcooling heat exchanger 41 connected in sequence. The compressor assembly is used to be connected to the refrigerant outlet of the indoor unit of the air conditioner through a first pipeline 71, and the subcooling heat exchanger 41 is used to be connected to the refrigerant inlet of the indoor unit.

[0042] The heat dissipation system also includes a power module 30 , and the connecting pipeline between the main heat exchange throttling component and the subcooling heat exchanger 41 includes a first pipe section 721 in contact with the power module 30 , so as to cool the power module 30 through the first pipe section 721 .

[0043] A first connection point 722 and a second connection point 723 are provided on the connecting pipeline between the main heat exchange throttling assembly and the subcooling heat exchanger 41 ; the first connection point 722 is located upstream of the second connection point 723 , and the first connection point 722 is located downstream of the first pipe section 721 .

[0044] The heat dissipation system also includes a spray enthalpy main line 731, the inlet end of the spray enthalpy main line 731 is connected to the second connection point 723, and the outlet end of the spray enthalpy main line 731 is connected to the intake port of the compressor 11 of the compressor assembly; the spray enthalpy main line 731 is provided with a subcooling throttling device 42, a third connection point 811 and a fourth connection point 812; the spray enthalpy main line 731 passes through the subcooling heat exchanger 41; the subcooling heat exchanger 41 is located downstream of the subcooling throttling device 42, and the subcooling heat exchanger 41 is located upstream of the third connection point 811; the fourth connection point 812 is located between the subcooling throttling device 42 and the subcooling heat exchanger 41.

[0045] The heat dissipation system also includes a heat dissipation pipe 60, the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722 or the fourth connection point 812; the outlet end of the heat dissipation pipe 60 is connected to the first pipe 71 and / or the third connection point 811; the heat dissipation pipe 60 includes a second pipe section 600 in contact with the power module 30, so as to cool the power module 30 through the second pipe section 600.

[0046] The main heat exchange throttling assembly includes a main heat exchanger 21 and a main throttling element 22 connected in sequence. The main heat exchanger 21 is located on the side of the main throttling element 22 close to the compressor assembly, that is, the main heat exchanger 21 is located upstream of the main throttling element 22.

[0047] The main heat exchanger 21 is a condenser.

[0048] The refrigerant discharged from the compressor assembly is a high-temperature, high-pressure gas. After passing through the main heat exchanger 21, the high-temperature, high-pressure gas refrigerant becomes a low-temperature, high-pressure liquid refrigerant. After passing through the main throttling member 22, the low-temperature, high-pressure liquid refrigerant becomes a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant in the first pipe section 721 can cool the power module 30. The refrigerant in the first pipe section 721 will absorb the heat of the power module 30, so the temperature of the refrigerant after flowing through the first pipe section 721 will increase to a certain extent. The refrigerant after flowing through the first pipe section 721 is divided into two paths, namely the first path and the second path, at the second connection point 723. The first path flows directly through the cold heat exchanger 41 and enters the refrigerant inlet of the indoor unit. After flowing through the cold heat exchanger 41, the refrigerant becomes a low-pressure gas refrigerant. After flowing through the evaporator of the indoor unit, the gas refrigerant becomes a high-temperature, low-pressure gas refrigerant. After flowing through the compressor assembly, the high-temperature, low-pressure gas refrigerant is compressed into a high-temperature, high-pressure gas refrigerant, thereby forming a main circulation loop of the refrigerant.

[0049] The second path flows through the cold throttling device 42 and the subcooling heat exchanger 41 in sequence and then directly enters the compressor 11 through the air intake port of the compressor 11; wherein, the refrigerant is a low-pressure gas refrigerant after flowing through the cold throttling device 42 and the subcooling heat exchanger 41 in sequence; the subcooling throttling device 42 is used to reduce the pressure of the second path refrigerant; the low-pressure gas refrigerant enters the compressor 11 to be mixed with the partially compressed refrigerant in the compressor 11 and then compressed to realize the "two-stage compression" of a single compressor, thereby increasing the refrigerant flow in the condenser, increasing the enthalpy difference of the main circulation loop, realizing the enthalpy increase function, and thereby improving the energy efficiency of the compressor.

[0050] When the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722 , a portion of the refrigerant flowing through the first pipe section 721 flows into the heat dissipation pipe 60 , and cools the power module 30 again when flowing through the second pipe section 600 of the heat dissipation pipe 60 .

[0051] When the inlet end of the heat dissipation pipe 60 is connected to the fourth connection point 812, after the second refrigerant is throttled by the cold throttling member 42, a portion of the refrigerant flows into the heat dissipation pipe 60, so as to cool the power module 30 again when flowing through the second pipe section 600 of the heat dissipation pipe 60.

[0052] When the refrigerant in the heat dissipation pipe 60 cools down the power module 30 again, the refrigerant in the heat dissipation pipe 60 absorbs the heat of the power module 30 again, thereby becoming a gas refrigerant.

[0053] When the outflow end of the heat dissipation pipeline 60 is connected to the first pipeline 71 , the gas refrigerant flowing out of the heat dissipation pipeline 60 directly enters the first pipeline 71 and then flows through the compressor assembly to be compressed.

[0054] When the outflow end of the heat dissipation pipe 60 is connected to the third connection point 811, the gas refrigerant flowing out of the heat dissipation pipe 60 directly enters the injection enthalpy main line 731, and then enters the compressor 11 to be mixed with the partially compressed refrigerant in the compressor 11 and then compressed.

[0055] Specifically, the compressor assembly includes a gas-liquid separator 12, a compressor 11 and an oil separator 13 connected in sequence. The gas-liquid separator 12 is located on the side of the refrigerant outlet of the compressor 11 close to the indoor unit, that is, the gas-liquid separator 12 is located upstream of the compressor 11, and the compressor 11 is located upstream of the oil separator 13.

[0056] Optionally, the subcooling throttling element 42 is a subcooling expansion valve.

[0057] Optionally, the main throttling element 22 is an expansion valve.

[0058] The heat dissipation system of the present application is a power module heat dissipation method with dual flow paths, that is, two heat dissipation flow paths are arranged in the power module 30; one is the first pipe section 721, the first pipe section 721 is the main heat dissipation flow path of the power module 30; the other is the second pipe section 600.

[0059] Specifically, both the first tube segment 721 and the second tube segment 600 can cover the heat dissipation area of the power module 30 .

[0060] When the power module 30 generates a large amount of heat, that is, when the heat dissipation load of the power module 30 is high, the first pipe section 721 and the second pipe section 600 are both in a connected state, so that the first pipe section 721 and the second pipe section 600 jointly cool the power module 30. The first pipe section 721 and the second pipe section 600 jointly bear the heat dissipation load, thereby improving the heat dissipation efficiency of the power module 30 and enhancing the heat dissipation effect of the power module 30.

[0061] When the heat generated by the power module 30 is relatively small, that is, when the heat dissipation load of the power module 30 is relatively low, the heat dissipation pipeline 60 is disconnected, and only the first pipe section 721 is used to cool the power module 30 .

[0062] The heat dissipation system of the present application can open or cut off the heat dissipation pipeline 60 according to the heat exchange amount required by the power module 30, thereby adjusting the actual heat exchange amount of the power module.

[0063] Specifically, when the outflow end of the heat dissipation pipeline 60 is aligned with the first pipeline 71 , the outflow end of the heat dissipation pipeline 60 is located on the inlet pipeline of the gas-liquid separator 12 .

[0064] In the present application, when the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722, a preset throttling component 61 is provided on the heat dissipation pipe 60, and the preset throttling component 61 is located upstream of the second pipe section 600; the preset throttling component 61 is used to reduce the pressure of the refrigerant entering the heat dissipation pipe 60.

[0065] In the present application, a regulating valve is provided on the heat dissipation pipeline 60 to control the opening and closing of the heat dissipation pipeline 60 and adjust the flow rate of the refrigerant in the heat dissipation pipeline 60. The regulating valve is located upstream of the second pipe section 600. When the regulating valve is open, the heat dissipation pipeline 60 is connected, and the refrigerant flows through the heat dissipation pipeline 60. When the regulating valve is closed, the heat dissipation pipeline 60 is disconnected.

[0066] Optionally, when the inlet end of the heat dissipation pipeline 60 is connected to the first connection point 722 , the preset throttling component 61 is used as a regulating valve to control the on / off of the heat dissipation pipeline 60 and adjust the refrigerant flow in the heat dissipation pipeline 60 through the preset throttling component 61 .

[0067] Optionally, the preset throttling component 61 includes at least one of a throttling valve, a capillary tube and an expansion valve.

[0068] In the present application, a fifth connection point 813 is further provided on the enthalpy spray main line 731, and the fifth connection point 813 is located between the subcooling heat exchanger 41 and the third connection point 811; the heat dissipation system also includes a enthalpy spray branch line 732, and the inlet end of the enthalpy spray branch line 732 is connected to the fifth connection point 813; a sixth connection point 711 and a seventh connection point 712 are provided on the first line 71, and the sixth connection point 711 is located upstream of the seventh connection point 712; the outflow end of the heat dissipation line 60 is used to be connected to the sixth connection point 711, so that the outflow end of the heat dissipation line 60 is connected to the first line 71; the outflow end of the enthalpy spray branch line 732 is connected to the seventh connection point 712; the enthalpy spray branch line 732 can be set to be on and off.

[0069] During the specific implementation process, when the spray enthalpy branch line 732 is connected, the second refrigerant is divided into two branches at the fifth connection point 813 after flowing through the cold throttling device 42 and the subcooling heat exchanger 41 in sequence. The two branches are respectively the first branch and the second branch; the first branch enters the compressor 11 through the intake port of the compressor 11; the second branch enters the compressor assembly through the spray enthalpy branch line 732.

[0070] Specifically, a third control valve 51 is provided on the enthalpy spraying branch pipeline 732 to control the on-off of the enthalpy spraying branch pipeline 732 through the third control valve 51 .

[0071] Optionally, the third control valve 51 is a solenoid valve.

[0072] Specifically, the pipe section between the fifth connection point 813 of the injection enthalpy main line 731 and the air intake of the compressor 11 can be set to be openable and disconnectable.

[0073] Specifically, a fourth control valve is provided on the pipe section between the fifth connection point 813 of the injection enthalpy main line 731 and the air intake of the compressor 11 to control the on-off of the pipe section between the fifth connection point 813 and the air intake of the compressor 11 through the fourth control valve.

[0074] Optionally, when the third control valve 51 is closed, so that the injection enthalpy branch line 732 is disconnected, the fourth control valve is opened, so that the pipe section between the fifth connection point 813 and the air intake of the compressor 11 is connected. When the third control valve 51 is opened, so that the injection enthalpy branch line 732 is connected, the fourth control valve is closed, so that the pipe section between the fifth connection point 813 and the air intake of the compressor 11 is disconnected.

[0075] Optionally, the fourth control valve is located between the fifth connection point 813 and the third connection point 811 .

[0076] In the present application, the heat dissipation system also includes a four-way valve 52, and the pipeline between the compressor assembly and the main heat exchange throttling assembly is connected through a connecting path of the four-way valve 52; the first pipeline 71 is connected through another connecting path of the four-way valve 52.

[0077] like Figures 1 to 4 As shown, the lower end of the four-way valve 52 is communicated with the right end to form a communication path; the left end of the four-way valve 52 is communicated with the upper end to form another communication path.

[0078] Specifically, the four-way valve 52 is located upstream of the sixth connection point 711 .

[0079] In the present application, the heat dissipation pipeline 60 includes at least one second pipe section 600 ; when the heat dissipation pipeline 60 includes multiple second pipe sections 600 , the multiple second pipe sections 600 are arranged in parallel.

[0080] In the present application, the second tube section 600 is disposed on the power module 30 .

[0081] In this application, there are one or more heat dissipation pipes 60 .

[0082] The utility model also provides an air-conditioning outdoor unit, which includes the above-mentioned heat dissipation system.

[0083] The utility model also provides an air conditioner, which includes the above-mentioned air conditioner outdoor unit.

[0084] Example 1

[0085] In this embodiment, if Figure 1 As shown, the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722; the outlet end of the heat dissipation pipe 60 is connected to the first pipe 71, that is, the outlet end of the heat dissipation pipe 60 is used to connect to the sixth connection point 711. The heat dissipation pipe 60 is provided with a preset throttling component 61, which is located upstream of the second pipe section 600. The preset throttling component 61 can control the on / off of the heat dissipation pipe 60 and adjust the refrigerant flow within the heat dissipation pipe 60.

[0086] Specifically, when the refrigerant in the second pipe section 600 cools the power module 30 , the refrigerant in the second pipe section 600 absorbs heat from the power module 30 and then flows directly into the compressor assembly without participating in the refrigeration cycle of the main circuit.

[0087] Example 2

[0088] In this embodiment, if Figure 2As shown, the inlet end of the heat dissipation pipeline 60 is connected to the fourth connection point 812, and the outlet end of the heat dissipation pipeline 60 is connected to the first pipeline 71, that is, the outlet end of the heat dissipation pipeline 60 is used to connect to the sixth connection point 711. The heat dissipation pipeline 60 is provided with a first control valve 62, which is located upstream of the second pipe section 600. The first control valve 62 is a regulating valve, that is, it controls the on-off of the heat dissipation pipeline 60 and adjusts the refrigerant flow in the heat dissipation pipeline 60.

[0089] Optionally, the first control valve 62 is a solenoid valve or an electric ball valve.

[0090] During the specific implementation process, when the second pipe section 600 is needed to cool the power module 30, and when the subcooling heat exchanger 41 is needed for subcooling, the subcooling throttling device 42 and the first control valve 62 are opened to allow the second refrigerant to flow through the throttling device 42 after throttling, and part of the refrigerant flows into the heat dissipation pipeline 60, and the other part flows into the spray enthalpy main pipeline 731.

[0091] When the subcooling heat exchanger 41 is required for subcooling, but the second pipe section 600 is not required to cool the power module 30, the subcooling throttle 42 is opened and the first control valve 62 is closed so that the second refrigerant flows into the spray enthalpy main line 731 after being throttled by the subcooling throttle 42, and does not flow into the heat dissipation line 60.

[0092] The cost of the first control valve 62 is lower than the cost of the preset throttling component 61 , so this embodiment is helpful in reducing costs.

[0093] Example 3

[0094] In this embodiment, if Figure 3 As shown, the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722, and the outlet end of the heat dissipation pipe 60 is connected to the third connection point 811. A preset throttling assembly 61 is provided on the heat dissipation pipe 60, and is located upstream of the second pipe section 600. The preset throttling assembly 61 can control the on / off of the heat dissipation pipe 60 and adjust the refrigerant flow within the heat dissipation pipe 60.

[0095] Specifically, when the refrigerant in the second pipe section 600 cools the power module 30, the refrigerant in the second pipe section 600 absorbs the heat of the power module 30 and then enters the compressor through the injection enthalpy main line 731 to mix with the partially compressed refrigerant in the compressor 11 and then be compressed.

[0096] Example 4

[0097] In this embodiment, if Figure 4As shown, the heat dissipation pipeline 60 includes a heat dissipation main pipe section 601 and two heat dissipation branch pipe sections 602; the inlet end of the heat dissipation main pipe section 601 is connected to the first connection point 722, that is, the inlet end of the heat dissipation main pipe section 601 is the inlet end of the heat dissipation pipeline 60; the inlet ends of the two heat dissipation branch pipe sections 602 are both connected to the outflow end of the heat dissipation main pipe section 601; the outflow end of one heat dissipation branch pipe section 602 is connected to the first pipeline 71, that is, the outflow end of one heat dissipation branch pipe section 602 is connected to the sixth connection point 711; the outflow end of the other heat dissipation branch pipe section 602 is connected to the third connection point 811; the outflow end of the heat dissipation pipeline 60 includes the outflow ends of the two heat dissipation branch pipe sections 602.

[0098] Both heat dissipation branch pipe sections 602 are configured to be openable and closed. The heat dissipation main pipe section 601 includes a second pipe section 600. A preset throttling assembly 61 is provided on the heat dissipation main pipe section 601 and is located upstream of the second pipe section 600. The preset throttling assembly 61 can control the opening and closing of the heat dissipation pipe 60 and adjust the refrigerant flow within the heat dissipation pipe 60.

[0099] Specifically, each heat dissipation branch pipe section 602 is provided with a second control valve 6021 so as to control the on-off of the heat dissipation branch pipe section 602 where the second control valve 6021 is located.

[0100] Optionally, the second control valve 6021 is a solenoid valve, an electric ball valve, an electronic expansion valve, etc.

[0101] Specifically, after the refrigerant in the second pipe section 600 absorbs the heat of the power module 30 , a portion of the refrigerant flows directly into the compressor assembly through a heat dissipation branch pipe section 602 , and another portion of the refrigerant flows into the injection enthalpy main line 731 through another heat dissipation branch pipe section 602 .

[0102] Optionally, both heat dissipation branch pipe sections 602 are in a connected state. Alternatively, one of the two heat dissipation branch pipe sections 602 is in a connected state, and the other is in a disconnected state.

[0103] This embodiment can realize different flow path circulation functions according to actual conditions. When the refrigerant state after flowing through the second pipe section 600 is not suitable for enthalpy injection, it can all flow directly into the compressor assembly; when the refrigerant state after flowing through the second pipe section 600 is suitable for enthalpy injection, it can partially or completely flow into the enthalpy injection main line 731 to realize the enthalpy injection function.

[0104] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0105] In the heat dissipation system provided by the present invention, the heat dissipation system includes a compressor assembly, a main heat exchange throttling assembly, and a subcooling heat exchanger 41 connected in sequence. The compressor assembly is used to be connected to the refrigerant outlet of the indoor unit of the air conditioner through a first pipeline 71, and the subcooling heat exchanger 41 is used to be connected to the refrigerant inlet of the indoor unit.

[0106] The heat dissipation system also includes a power module 30 , and the connecting pipeline between the main heat exchange throttling component and the subcooling heat exchanger 41 includes a first pipe section 721 in contact with the power module 30 , so as to cool the power module 30 through the first pipe section 721 .

[0107] A first connection point 722 and a second connection point 723 are provided on the connecting pipeline between the main heat exchange throttling assembly and the subcooling heat exchanger 41 ; the first connection point 722 is located upstream of the second connection point 723 , and the first connection point 722 is located downstream of the first pipe section 721 .

[0108] The heat dissipation system also includes a spray enthalpy main line 731, the inlet end of the spray enthalpy main line 731 is connected to the second connection point 723, and the outlet end of the spray enthalpy main line 731 is connected to the intake port of the compressor 11 of the compressor assembly; the spray enthalpy main line 731 is provided with a subcooling throttling device 42, a third connection point 811 and a fourth connection point 812; the spray enthalpy main line 731 passes through the subcooling heat exchanger 41; the subcooling heat exchanger 41 is located downstream of the subcooling throttling device 42, and the subcooling heat exchanger 41 is located upstream of the third connection point 811; the fourth connection point 812 is located between the subcooling throttling device 42 and the subcooling heat exchanger 41.

[0109] The heat dissipation system also includes a heat dissipation pipe 60, the inlet end of the heat dissipation pipe 60 is connected to the first connection point 722 or the fourth connection point 812; the outlet end of the heat dissipation pipe 60 is connected to the first pipe 71 and / or the third connection point 811; the heat dissipation pipe 60 includes a second pipe section 600 in contact with the power module 30, so as to cool the power module 30 through the second pipe section 600.

[0110] When the power module 30 generates a large amount of heat, the first pipe section 721 and the second pipe section 600 are both in a connected state, so that the first pipe section 721 and the second pipe section 600 jointly cool the power module 30. The first pipe section 721 and the second pipe section 600 jointly bear the heat dissipation load, thereby improving the heat dissipation efficiency of the power module 30 and enhancing the heat dissipation effect of the power module 30.

[0111] When the heat generated by the power module 30 is relatively low, the heat dissipation pipe 60 is disconnected, and the power module 30 is cooled only by the first pipe section 721 .

[0112] The heat dissipation system of the present application: 1. A heat dissipation pipeline 60 is added to improve the heat dissipation capacity; 2. The heat dissipation pipeline 60 can be opened or cut off according to actual needs; 3. The refrigerant flow in the heat dissipation pipeline 60 can be regulated by a regulating valve according to actual needs; 4. The refrigerant after flowing through the heat dissipation pipeline 60 can still participate in the refrigeration cycle and will not cause the cooling capacity to decay.

[0113] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0114] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0115] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat dissipation system, comprising a power module (30), a spray enthalpy main line (731), and a compressor assembly, a main heat exchange throttling assembly, and a subcooling heat exchanger (41) connected in sequence, wherein the compressor assembly is used to be connected to the refrigerant outlet of the indoor unit of the air conditioner through a first pipeline (71), and the subcooling heat exchanger (41) is used to be connected to the refrigerant inlet of the indoor unit; the connecting pipeline between the main heat exchange throttling assembly and the subcooling heat exchanger (41) includes a first pipe section (721) in contact with the power module (30) to cool the power module (30); the outflow end of the spray enthalpy main line (731) is connected to the air intake of the compressor (11) of the compressor assembly; characterized in that A first connection point (722) and a second connection point (723) are provided on the connecting pipeline between the main heat exchange throttling component and the subcooling heat exchanger (41), wherein the first connection point (722) is located upstream of the second connection point (723) and downstream of the first pipe section (721); The inlet end of the spray enthalpy main line (731) is connected to the second connection point (723), and the spray enthalpy main line (731) is provided with a subcooling throttling element (42), a third connection point (811), and a fourth connection point (812). The spray enthalpy main line (731) passes through the subcooling heat exchanger (41), and the subcooling heat exchanger (41) is located downstream of the subcooling throttling element (42) and upstream of the third connection point (811); the fourth connection point (812) is located between the subcooling throttling element (42) and the subcooling heat exchanger (41); The heat dissipation system further comprises a heat dissipation pipeline (60), wherein an inlet end of the heat dissipation pipeline (60) is connected to the first connection point (722) or the fourth connection point (812), and an outlet end of the heat dissipation pipeline (60) is connected to the first pipeline (71) and / or the third connection point (811); the heat dissipation pipeline (60) comprises a second pipe section (600) in contact with the power module (30) to cool the power module (30).

2. The heat dissipation system according to claim 1, characterized in that: The compressor assembly comprises a gas-liquid separator (12), the compressor (11) and an oil separator (13) connected in sequence; and / or The main heat exchange throttling assembly comprises a main heat exchanger (21) and a main throttling element (22) connected in sequence.

3. The heat dissipation system according to claim 1, characterized in that: When the inlet end of the heat dissipation pipeline (60) is connected to the first connection point (722), a preset throttling component (61) is provided on the heat dissipation pipeline (60), and the preset throttling component (61) is located upstream of the second pipe section (600).

4. The heat dissipation system according to claim 1, wherein: The heat dissipation pipeline (60) is provided with a regulating valve to control the on / off of the heat dissipation pipeline (60) and to regulate the flow of the refrigerant in the heat dissipation pipeline (60); the regulating valve is located upstream of the second pipe section (600).

5. The heat dissipation system according to claim 4, characterized in that: When the inlet end of the heat dissipation pipeline (60) is connected to the first connection point (722), a preset throttling component (61) is provided on the heat dissipation pipeline (60), and the preset throttling component (61) serves as the regulating valve.

6. The heat dissipation system according to claim 1, characterized in that: The spray enthalpy main line (731) is further provided with a fifth connection point (813), and the fifth connection point (813) is located between the subcooling heat exchanger (41) and the third connection point (811); the heat dissipation system further includes a spray enthalpy branch line (732), and the inlet end of the spray enthalpy branch line (732) is connected to the fifth connection point (813); A sixth connection point (711) and a seventh connection point (712) are provided on the first pipeline (71), and the sixth connection point (711) is located upstream of the seventh connection point (712); the outflow end of the heat dissipation pipeline (60) is used to be connected to the sixth connection point (711) so as to be connected to the first pipeline (71); the outflow end of the enthalpy spray branch pipeline (732) is connected to the seventh connection point (712); and the enthalpy spray branch pipeline (732) can be set to be on and off.

7. The heat dissipation system according to claim 1, characterized in that: The heat dissipation system further includes a four-way valve (52), wherein the pipeline between the compressor assembly and the main heat exchange throttling assembly is connected via a communication path of the four-way valve (52); and the first pipeline (71) is connected via another communication path of the four-way valve (52).

8. The heat dissipation system according to claim 1, characterized in that: The heat dissipation pipeline (60) comprises a heat dissipation main pipe section (601) and two heat dissipation branch pipe sections (602); the inlet end of the heat dissipation main pipe section (601) is connected to the first connection point (722); the inlet ends of the two heat dissipation branch pipe sections (602) are both connected to the outflow end of the heat dissipation main pipe section (601), the outflow end of one heat dissipation branch pipe section (602) is connected to the first pipeline (71), and the outflow end of the other heat dissipation branch pipe section (602) is connected to the third connection point (811); the two heat dissipation branch pipe sections (602) can be set to be on and off; the heat dissipation main pipe section (601) comprises the second pipe section (600), and a preset throttling component (61) is provided on the heat dissipation main pipe section (601), and the preset throttling component (61) is located upstream of the second pipe section (600).

9. An air conditioner outdoor unit, characterized in that: A heat dissipation system comprising the heat dissipation system according to any one of claims 1 to 8.

10. An air conditioner, characterized in that: Including the air-conditioning outdoor unit according to claim 9.

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