Liquid cooling unit

Abstract

The utility model relates to a liquid cooling unit, the liquid cooling unit includes the casing, compressor, condenser, heat exchanger, water pump, compressor, condenser and heat exchanger are connected in proper order to form refrigerating system, and water pump is connected with heat exchanger through cooling liquid pipeline to form liquid cooling system, and refrigerating system and liquid cooling system heat exchange at heat exchanger, the both ends of cooling liquid pipeline form liquid outlet and back liquid mouth, and the first end of injection liquid pipeline is connected with cooling liquid pipeline, and the second end of injection liquid pipeline forms injection liquid mouth, and injection liquid pipeline is higher than cooling liquid pipeline, and the second end of injection liquid pipeline is higher than the first end of injection liquid pipeline, makes the injection liquid mouth of injection liquid pipeline second end can be located at the highest place of cooling liquid pipeline, and the residual gas in cooling liquid pipeline after injection can gather at the second end of injection liquid pipeline, and is discharged through injection liquid mouth, is favorable to the discharge of residual gas.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a liquid cooling unit. Background Technology

[0002] With the development of energy storage battery technology, liquid cooling and heating are core issues for electrochemical energy storage. Among related technologies, liquid cooling is the primary method for temperature control of energy storage batteries. A liquid cooling unit is a device that cools the battery system by pumping the coolant to the end of the system.

[0003] In related technologies, liquid-cooled units typically consist of a refrigeration system and a liquid cooling system. The refrigeration system includes components such as a heat exchanger, compressor, condenser, and electronic expansion valve. Superheated vapor is generated by the compressor, evaporated and cooled in the heat exchanger and condenser, and then throttled by the electronic expansion valve to complete the refrigeration cycle. The liquid cooling system includes components such as a water pump, pipe assembly, expansion tank, and PTC heater. The refrigeration system and liquid cooling system exchange heat in the heat exchanger to cool the coolant, which is then pumped to the terminal for temperature control of the battery system.

[0004] In related liquid cooling units, due to limited space, the height of the liquid cooling unit is usually relatively low, which limits the overall height of the liquid cooling unit. There is not enough space inside the liquid cooling unit to install the exhaust valve, which needs to be installed on the secondary pipeline of the energy storage cabinet, occupying a large space of the entire cabinet. Utility Model Content

[0005] The purpose of this utility model is to provide a liquid cooling unit to solve the problems of automatic exhaust and space occupation of liquid cooling units.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: According to one aspect of the present invention, a liquid cooling unit is provided, comprising: a housing forming an outer shell of the liquid cooling unit; a compressor disposed within the housing; a condenser disposed within the housing; a heat exchanger disposed within the housing, wherein the compressor, the condenser, and the heat exchanger are sequentially connected to form a refrigeration system; and a water pump disposed within the housing, wherein the water pump is connected to the heat exchanger via a coolant pipeline to form a liquid cooling system. The system comprises a refrigeration system and a liquid cooling system that exchange heat at a heat exchanger; wherein, the two ends of the coolant pipeline form an outlet and a return port, which are located on the outer wall of the housing; the liquid cooling system further comprises an injection pipeline, the first end of which is connected to the coolant pipeline, and the second end of which forms an injection port, which is located on the outer wall of the housing; the injection pipeline is higher than the coolant pipeline, and the second end of the injection pipeline is higher than the first end of the injection pipeline.

[0007] The above technical solution has the following advantages or beneficial effects: A refrigeration system can be formed by the condenser, compressor, and heat exchanger, allowing the condenser to be used for cooling or heating, thereby controlling the temperature of the battery system. A liquid cooling system can be formed by the heat exchanger, water pump, and coolant piping. The liquid cooling system exchanges heat with the refrigeration system at the heat exchanger, thereby regulating the heat exchanger temperature and improving the operating efficiency of the refrigeration system. By making the injection pipe higher than the coolant piping, and with the second end of the injection pipe higher than the first end, the injection port at the second end of the injection pipe can be located at the highest point of the coolant piping. After injection, residual gas in the coolant piping can accumulate at the second end of the injection pipe and be discharged directly through the injection port or by adding an exhaust valve at the injection port, which is beneficial for the discharge of residual gas. Since the injection port is located outside the casing, the exhaust valve at the outlet can also be located outside the casing, reducing the space occupied inside the casing and helping to reduce the overall height of the liquid cooling unit.

[0008] In some embodiments of this application, the second end of the injection pipeline is provided with a first tee pipe, the first interface of the first tee pipe is connected to the second end of the injection pipeline, the second interface of the first tee pipe is connected to the injection port, and the third interface of the first tee pipe is connected to the vent valve.

[0009] The above technical solution has the following advantages or beneficial effects: by setting a first tee pipe between the second end of the injection pipeline and the injection port, the vent valve can be connected to the first tee pipe, so that the second end of the injection pipeline can vent through the first tee pipe and the vent valve, and at the same time, coolant can be injected into the injection pipeline through the injection port and the first tee pipe, thus achieving the function of both injection and venting.

[0010] In some embodiments of this application, the third port of the first tee pipe extends upward, and the exhaust valve is located at the top of the third port of the first tee pipe.

[0011] The above-mentioned technical solution has the following advantages or beneficial effects: by extending the third interface of the first tee pipe upward, it is convenient for residual gas in the liquid injection pipeline to be discharged upward through the third interface of the first tee pipe, and discharged through the exhaust valve to the pipeline structure of the liquid cooling system, thereby improving exhaust efficiency.

[0012] In some embodiments of this application, a filter screen is provided inside the injection port. The filter screen is sheet-shaped and can filter the liquid flowing through the injection port.

[0013] The above-mentioned technical solution has the following advantages or beneficial effects: when the external liquid injection equipment injects coolant into the liquid injection pipeline and coolant pipeline through the liquid injection port, the filter screen can filter the liquid flowing through the liquid injection port, improve the reliability of liquid injection, prevent impurities from entering the liquid cooling system, and thus prevent impurities from clogging the water pump.

[0014] In some embodiments of this application, the second interface of the first three-way pipe is connected to a liquid injection connector, the liquid injection port is formed inside the liquid injection connector, the filter screen is disposed inside the liquid injection connector, and the plane of the filter screen is arranged relatively perpendicular to the axial direction of the liquid injection connector.

[0015] The above-mentioned technical solution has the following advantages or beneficial effects: by arranging the plane of the filter screen relatively perpendicular to the axis of the injection joint, the filter screen and the axis of the injection port are also arranged relatively perpendicular. During the injection process, when the coolant flows through the injection port, the coolant can flow perpendicularly through the filter screen, increasing the contact area between the filter screen and the coolant, thereby improving the filtration efficiency of the filter screen.

[0016] In some embodiments of this application, the liquid cooling system includes an expansion tank disposed inside the housing, and the expansion tank is connected to the liquid injection pipeline via an expansion connecting pipe; the height of the expansion connecting pipe is lower than the height of the liquid injection port.

[0017] The above technical solution has the following advantages or beneficial effects: the expansion tank can be connected to the injection pipeline, return pipeline, and outlet pipeline through the expansion connection pipe. The expansion tank can play a role in constant pressure water replenishment. Because the height of the expansion connection pipe is lower than the height of the injection port, the residual gas in the injection pipeline can flow smoothly to the second end of the injection pipeline and be discharged through the injection port.

[0018] In some embodiments of this application, the injection pipeline includes a first pipe segment and a second pipe segment connected in sequence, with a second tee pipe provided between the first pipe segment and the second pipe segment; the first port of the second tee pipe is connected to the first pipe segment, the second port of the second tee pipe is connected to the second pipe segment, and the third port of the second tee pipe is connected to the expansion connection pipe; the end of the first pipe segment away from the second tee pipe is connected to the coolant pipeline, and the end of the second pipe segment away from the second tee pipe is provided with the injection port.

[0019] The above technical solution has the following advantages or beneficial effects: the expansion connecting pipe can be smoothly connected to the injection pipeline through the second tee pipe, and the height of the expansion connecting pipe is lower than the second end of the injection pipeline, and thus lower than the injection port.

[0020] In some embodiments of this application, the expansion connecting pipe extends obliquely upward in the direction from the expansion tank toward the second tee pipe, such that the end of the expansion connecting pipe connected to the second tee pipe is higher than the end of the expansion connecting pipe connected to the expansion tank.

[0021] The above technical solution has the following advantages or beneficial effects: the expansion connecting pipe is arranged to extend upward at an angle so that the height of the expansion connecting pipe gradually increases, and the end of the expansion connecting pipe connected to the second tee pipe is higher than the end of the expansion connecting pipe connected to the expansion tank, thereby preventing the gas in the injection pipeline from flowing back into the expansion connecting pipe and the expansion tank.

[0022] In some embodiments of this application, the coolant pipeline includes: an outlet pipeline, one end of which is connected to the heat exchanger, and the other end of which extends out of the housing and forms the outlet; a return pipeline, one end of which is connected to the pumping end of the water pump, and the other end of which extends out of the housing and forms the return port; the discharge end of the water pump is connected to the heat exchanger via a delivery pipeline; and a first end of an injection pipeline is connected to the return pipeline, and the injection pipeline is higher than the outlet pipeline and the return pipeline.

[0023] The above technical solution has the following advantages or beneficial effects: The water pump can draw coolant from the return pipe and transport it to the heat exchanger through the delivery pipe for heat exchange, and the coolant in the outlet pipe can be transported to external equipment through the outlet port, thereby realizing temperature control of the external equipment. The coolant after heat exchange with the external equipment can return to the water pump through the return port and return pipe. By making the injection pipe higher than the outlet and return pipes, the residual gas generated in the outlet and return pipes can flow smoothly into the injection pipe and flow towards the second end of the injection pipe, ensuring that the gas can flow smoothly to the injection port and the vent valve.

[0024] In some embodiments of this application, the return port is higher than the outlet port, the end of the return pipeline forming the return port is higher than the end of the return pipeline connected to the water pump, and the first end of the injection pipeline is higher than the pumping end of the water pump.

[0025] The above technical solution has the following advantages or beneficial effects: the gas generated in the return pipe can move towards the end of the return pipe where the return port is formed, and will not enter the water pump. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a liquid-cooled unit according to some embodiments of the present invention.

[0027] Figure 2 yes Figure 1 A schematic diagram of some of the internal structures.

[0028] Figure 3 yes Figure 2 A partial structural diagram.

[0029] Figure 4 yes Figure 3 A schematic diagram of the liquid cooling system.

[0030] Figure 5 yes Figure 4 A side view.

[0031] Figure 6 yes Figure 5 A schematic diagram of its decomposed structure.

[0032] Figure 7 yes Figure 3 A partially enlarged structural diagram.

[0033] Figure 8 yes Figure 6 A schematic diagram of its decomposed structure.

[0034] Figure 9 yes Figure 7 A partial structural diagram.

[0035] Figure 10 yes Figure 9 A sectional view.

[0036] Figure 11 yes Figure 6 A partial structural diagram.

[0037] Figure 12 yes Figure 11 A schematic diagram of its decomposed structure.

[0038] The reference numerals in the attached drawings are explained as follows: 1. Housing; 11. Air inlet; 12. Air outlet; 13. Condenser fan; 2. Compressor; 3. Condenser; 4. Heat exchanger; 5. Water pump; 51. Liquid delivery line; 60. Coolant line; 601. Liquid outlet; 602. Liquid return port; 61. Liquid outlet line; 611. PCT heater; 62. Liquid return line; 7. Liquid injection line; 701. Liquid injection port; 702. Exhaust valve; 703. Filter screen; 71. First tee pipe; 72. Liquid injection connector; 73. First pipe section; 74. Second pipe section; 75. Second tee pipe; 8. Expansion tank; 81. Expansion connection pipe. Detailed Implementation

[0039] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] Figure 1This is a schematic diagram of the structure of a liquid-cooled unit according to some embodiments of the present invention. Figure 2 yes Figure 1 A schematic diagram of some of the internal structures.

[0044] like Figure 1 and Figure 2 As shown, some embodiments of this application provide a liquid cooling unit that can be used to connect to an external device whose temperature needs to be regulated, thereby controlling the temperature of the external device. This external device can be an energy storage device with a battery, or other devices such as a variable temperature cabinet.

[0045] like Figure 1 As shown, in some embodiments, the liquid cooling unit may include a housing 1, which may form the outer casing of the liquid cooling unit. The interior of the housing 1 may be used to provide installation space.

[0046] Figure 3 yes Figure 2 A partial structural diagram.

[0047] like Figure 2 and Figure 3 As shown, in some embodiments, the liquid cooling unit may include a compressor 2, which is disposed within the housing 1. The compressor 2 is used to compress the refrigerant, turning it into a high-temperature, high-pressure gas.

[0048] In some embodiments, the liquid cooling unit may include a condenser 3, which is disposed within the casing 1. The condenser 3 is connected to the outlet end of the compressor 2. The compressor 2 delivers refrigerant to the condenser 3, where the condenser 3 can exchange heat with the refrigerant entering the condenser 3, thereby cooling the refrigerant and converting the high-temperature, high-pressure gas into a normal-temperature, high-pressure gaseous state.

[0049] In some embodiments, the liquid-cooled unit may include a heat exchanger 4, which is disposed within the casing 1. The heat exchanger 4 is connected to the condenser 3 and the compressor 2, respectively; that is, the compressor 2, the condenser 3, and the heat exchanger 4 are connected in sequence to form a refrigeration system. The condenser 3 delivers the cooled refrigerant to the heat exchanger 4, where it exchanges heat and then returns to the compressor 2, forming a closed-loop refrigeration system.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, an air inlet 11 may be provided on the outer wall of the housing 1, and the air inlet 11 may be located on the front side wall of the housing 1. The air inlet 11 may connect the inner and outer spaces of the housing 1. Air from outside the housing 1 enters the interior of the housing 1 through the air inlet 11 and exchanges heat with the condenser 3. It should be noted that in other embodiments, the air inlet 11 may also be located in other areas of the outer wall of the housing 1.

[0051] like Figure 1As shown, in some embodiments, an air outlet 12 may be provided on the outer wall of the housing 1, and the air outlet 12 may be located on the rear wall of the housing 1. The air outlet 12 may connect the inner and outer spaces of the housing 1. The air inside the housing 1 that has exchanged heat with the condenser 3 can be blown out of the housing 1 through the air outlet 12 and return to the outer space of the housing 1. It should be noted that in other embodiments, the air outlet 12 may also be located in other areas of the outer wall of the housing 1.

[0052] like Figure 2 As shown, in some embodiments, the liquid cooling unit may include a condenser fan 13, which is disposed inside the housing 1. The condenser fan 13 may be arranged opposite to the condenser 3. The condenser fan 13 can introduce air from outside the housing 1 into the housing 1 through the air inlet 11, exchange heat with the condenser 3, and then discharge the air from outside the housing 1 through the air outlet 12. This allows the outside air entering the housing 1 to cool the condenser 3, thereby improving the working efficiency of the condenser 3.

[0053] like Figure 2 As shown, in some embodiments, the air outlet 12 can be arranged opposite to the condenser 3 so that the hot air after heat exchange with the condenser 3 can be discharged to the outside of the casing 1 nearby, avoiding affecting the temperature of other components inside the casing 1.

[0054] Figure 4 yes Figure 3 A schematic diagram of the liquid cooling system.

[0055] like Figure 3 and Figure 4 As shown, in some embodiments, the liquid cooling unit may include a water pump 5, which is located inside the casing 1. The water pump 5 can be connected to the heat exchanger 4 via a coolant pipeline 60 to form a liquid cooling system. The coolant can circulate within the coolant pipeline 60 of the liquid cooling system, allowing the refrigeration system and the liquid cooling system to exchange heat at the heat exchanger 4. The coolant is cooled in the heat exchanger 4, and then the coolant is pumped to the external terminal equipment for temperature control.

[0056] In some embodiments, the two ends of the coolant pipeline 60 can be respectively formed as an outlet 601 and a return port 602. The outlet 601 and the return port 602 can be connected to external equipment respectively, thereby forming a closed-loop liquid cooling system between the water pump 5, the heat exchanger 4 and the external equipment. The coolant circulates in the pipeline of the liquid cooling system, exchanges heat with the heat exchanger 4 and the external equipment respectively, and then performs temperature control on the external equipment.

[0057] In some embodiments, the liquid outlet 601 and the liquid return port 602 are respectively located on the outer wall of the housing 1, which facilitates the connection of external equipment through external pipelines, thereby realizing a closed-loop liquid cooling system between the water pump 5, the heat exchanger 4 and the external equipment.

[0058] Figure 5 yes Figure 4 A side view. Figure 6 yes Figure 5 A schematic diagram of its decomposed structure.

[0059] like Figure 4 and Figure 6 As shown, in some embodiments, the coolant line 60 may include an outlet line 61, one end of which is connected to the heat exchanger 4, and the other end of which extends outside the housing 1 and forms an outlet 601. The coolant that has undergone heat exchange in the pipes of the heat exchanger 4 can be transported to external equipment through the outlet line 61 and the outlet 601, thereby realizing temperature control of the external equipment.

[0060] In some embodiments, the coolant line 60 may include a return line 62, one end of which is connected to the suction end of the water pump 5, and the other end of which extends outside the housing 1 and forms a return port 602. The coolant, after heat exchange with the external equipment, can return to the water pump 5 through the return port 602 and the return line 62, and then be pumped to the heat exchanger 4 for further heat exchange, forming a coolant circulation. This allows for continuous temperature control of the external equipment, ensuring that the temperature of the external equipment remains within a preset temperature range.

[0061] like Figure 4 and Figure 6 As shown, in some embodiments, a liquid delivery pipeline 51 is provided between the water pump 5 and the heat exchanger 4, and the discharge end of the water pump 5 can be connected to the heat exchanger 4 through the liquid delivery pipeline 51. The water pump 5 can draw coolant from the return pipeline 62 and deliver it to the heat exchanger 4 through the liquid delivery pipeline 51 for heat exchange, and the coolant in the outlet pipeline 61 can be delivered to external equipment through the outlet 601.

[0062] like Figure 3 , Figure 4 and Figure 6 As shown, in some embodiments, the liquid cooling system may include a liquid injection line 7. A first end of the liquid injection line 7 is connected to a coolant line 60, and a second end of the liquid injection line 7 extends outside the housing 1 and forms a liquid injection port 701, which is located on the outer wall of the housing 1. An external liquid injection device can be connected through the liquid injection port 701, allowing the external device to gradually inject coolant into the coolant line 60 through the liquid injection port 701 and the liquid injection line 7, thus filling the liquid cooling system's piping.

[0063] In some embodiments, the injection line 7 is higher than the coolant line 60, and the second end of the injection line 7 is higher than the first end of the injection line 7, so that the injection port 701 is located at the highest point of the liquid cooling system piping. During the injection process, the coolant preferentially fills other pipes outside the injection line 7, that is, preferentially fills the return line 62 and the outlet line 61, allowing air in the liquid cooling system piping to be vented into the injection line 7 and discharged through the injection port 701. In related technologies, the injection port 701 is typically only used for injection and cannot be used for venting. In this embodiment, the injection port 701 serves both the functions of injection and venting.

[0064] Furthermore, even when vacuum injection is used for liquid injection in the liquid cooling system, there will still be residual gas, and the pressure will drop after a period of operation. Therefore, venting the liquid cooling pipeline is very important. In this embodiment, the injection port 701 is placed at the highest point of the liquid cooling pipeline of the liquid cooling unit, so that the injection port 701 can be used to vent the liquid cooling system after it has been running for a period of time.

[0065] Figure 7 yes Figure 3 A partially enlarged structural diagram.

[0066] like Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, an exhaust valve 702 is provided on the liquid injection port 701, and the exhaust valve 702 is located outside the housing 1. The exhaust valve 702 can open and close the liquid cooling system. When the exhaust valve 702 is open, residual gas in the liquid cooling system can be discharged through the liquid injection port 701 and the exhaust valve 702.

[0067] In some embodiments, the vent valve 702 may employ an automatic venting structure. When the gas pressure at the liquid injection port 701 exceeds a preset value, the vent valve 702 may be automatically opened, thereby achieving automatic venting and enabling venting during the operation of the liquid cooling system.

[0068] Figure 8 yes Figure 6 A schematic diagram of its decomposed structure.

[0069] like Figure 3 , Figure 7 and Figure 8As shown, in some embodiments, the second end of the injection pipeline 7 may be provided with a first tee pipe 71. The first port of the first tee pipe 71 can be connected to the second end of the injection pipeline 7, the second port of the first tee pipe 71 can be connected to the injection port 701, and the third port of the first tee pipe 71 can be connected to the vent valve 702. By setting the first tee pipe 71 between the second end of the injection pipeline 7 and the injection port 701, the vent valve 702 can be connected to the first tee pipe 71, thereby allowing the second end of the injection pipeline 7 to vent air through the first tee pipe 71 and the vent valve 702, while simultaneously allowing coolant to be injected into the injection pipeline 7 through the injection port 701 and the first tee pipe 71, thus achieving the dual functions of injection and venting.

[0070] It should be noted that in other embodiments, the vent valve 702 can also be a liquid injection ball valve. The liquid injection ball valve is located at the liquid injection port 701. The liquid injection ball valve can be used to open and close the liquid injection port 701, and the liquid injection ball valve can simultaneously perform the functions of liquid injection and venting.

[0071] In some embodiments, the third port of the first tee pipe 71 can extend upward, and the exhaust valve 702 can be located at the top of the third port of the first tee pipe 71. By extending the third port of the first tee pipe 71 upward, residual gas in the liquid injection pipeline 7 can be easily discharged upward through the third port of the first tee pipe 71 and discharged from the pipeline structure of the liquid cooling system through the exhaust valve 702, thereby improving exhaust efficiency.

[0072] Figure 9 yes Figure 7 A partial structural diagram. Figure 10 yes Figure 9 A sectional view.

[0073] like Figure 9 and Figure 10 As shown, in some embodiments, a filter screen 703 is provided inside the injection port 701. The filter screen 703 may be sheet-like and can filter the liquid flowing through the injection port 701. When an external injection device injects coolant into the injection pipeline 7 and the coolant pipeline 60 through the injection port 701, the filter screen 703 can filter the liquid flowing through the injection port 701, improving the reliability of the injection process, preventing impurities from entering the liquid cooling system, and thus preventing impurities from clogging the water pump 5.

[0074] In some embodiments, the second port of the first tee pipe 71 may be connected to a liquid injection connector 72, and a liquid injection port 701 may be formed within the liquid injection connector 72. A filter screen 703 is disposed within the liquid injection connector 72, and the plane of the filter screen 703 is arranged relatively perpendicular to the axial direction of the liquid injection connector 72, thereby making the filter screen 703 and the axial direction of the liquid injection port 701 relatively perpendicular. During the liquid injection process, when the coolant flows through the liquid injection port 701, the coolant can flow perpendicularly through the filter screen 703, increasing the contact area between the filter screen 703 and the coolant, thereby improving the filtration efficiency of the filter screen 703.

[0075] Figure 11 yes Figure 6 A partial structural diagram.

[0076] like Figure 4 , Figure 6 and Figure 11 As shown, in some embodiments, the liquid cooling system may include an expansion tank 8, which is disposed within the housing 1. The expansion tank 8 is connected to the injection line 7 via an expansion connecting pipe 81. Thus, the expansion tank 8 can be connected to the injection line 7, the return line 62, and the outlet line 61 via the expansion connecting pipe 81. The expansion tank 8 can serve as a constant pressure water supply.

[0077] In some embodiments, the height of the expansion connection tube 81 is lower than the height of the injection port 701. Therefore, residual gas in the injection line 7 can flow smoothly to the second end of the injection line 7 and be discharged through the injection port 701.

[0078] Figure 12 yes Figure 11 A schematic diagram of its decomposed structure.

[0079] like Figure 4 , Figure 11 and Figure 12 As shown, in some embodiments, the injection line 7 may include a first pipe segment 73 and a second pipe segment 74 connected in sequence. The end of the first pipe segment 73 away from the second pipe segment 74 is the first end of the injection line 7 and is connected to the coolant line 60. The end of the second pipe segment 74 away from the first pipe segment 73 is the second end of the injection line 7 and is connected to the injection port 701. One end of the expansion connector 81 may be connected between the first pipe segment 73 and the second pipe segment 74.

[0080] In some embodiments, a second tee pipe 75 may be provided between the first pipe segment 73 and the second pipe segment 74. The first port of the second tee pipe 75 is connected to the first pipe segment 73, the second port of the second tee pipe 75 is connected to the second pipe segment 74, and the third port of the second tee pipe 75 is connected to the expansion connector 81. The end of the first pipe segment 73 furthest from the second tee pipe 75 is connected to the coolant line 60. The end of the second pipe segment 74 furthest from the second tee pipe 75 is provided with a filling port 701. Thus, the expansion connector 81 can be smoothly connected to the filling line 7 through the second tee pipe 75, and the height of the expansion connector 81 is lower than the second end of the filling line 7, and thus lower than the filling port 701.

[0081] like Figure 5 , Figure 11 and Figure 12 As shown, in some embodiments, in the direction from the expansion tank 8 toward the second three-way pipe 75, the expansion connecting pipe 81 is arranged to extend upward at an angle so that the height of the expansion connecting pipe 81 gradually increases, and the end of the expansion connecting pipe 81 connected to the second three-way pipe 75 is higher than the end of the expansion connecting pipe 81 connected to the expansion tank 8, thereby preventing the gas in the injection pipeline 7 from flowing back into the expansion connecting pipe 81 and the expansion tank 8.

[0082] like Figure 6 , Figure 11 and Figure 12 As shown, in some embodiments, the first end of the injection line 7 is connected to the return line 62, and the injection line 7 is higher than the outlet line 61 and the return line 62. The residual gas generated in the outlet line 61 and the return line 62 can flow smoothly into the injection line 7 and flow towards the second end of the injection line 7, ensuring that the gas can flow smoothly to the injection port 701 and the exhaust valve 702.

[0083] In some embodiments, the return port 602 is higher than the outlet port 601, allowing gas in the pipe flowing from the outlet port 601 to external equipment to move towards the outlet port 601. The end of the return pipe 62 forming the return port 602 is higher than the end of the return pipe 62 connected to the water pump 5. Thus, gas generated in the return pipe 62 can move towards the return port 602 and will not enter the water pump 5. The gas collects at the outlet port 601 of the outlet pipe 61, facilitating discharge through the injection pipe 7.

[0084] In some embodiments, the first end of the injection line 7 may be higher than the pumping end of the water pump 5. The first end of the injection line 7 may be arranged close to the outlet 601. In this way, the gas collected at the outlet 601 of the outlet line 61 can flow smoothly through the first end of the injection line 7 to the second end of the injection line 7, and be discharged through the injection port 701 and the vent valve 702.

[0085] In some embodiments, a PCT heater 611 may be provided on the outlet pipe 61. The PCT heater 611 can be used to heat the coolant, thereby increasing the temperature of the coolant in the outlet pipe 61. In conjunction with the heat exchanger 4, the coolant can be cooled down, thereby regulating the temperature of the coolant flowing out of the outlet 601 and realizing temperature control of external equipment.

[0086] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A liquid-cooled unit, characterized in that, include: The housing forms the outer shell of the liquid cooling unit; A compressor, wherein the compressor is disposed within the housing; A condenser, wherein the condenser is disposed within the housing; A heat exchanger is disposed inside the housing, and the compressor, the condenser and the heat exchanger are connected in sequence to form a refrigeration system; A water pump is located inside the housing and is connected to the heat exchanger via a coolant pipeline to form a liquid cooling system; the refrigeration system and the liquid cooling system exchange heat at the heat exchanger. The coolant pipeline has an outlet and a return port at both ends, and the outlet and the return port are located on the outer wall of the housing. The liquid cooling system also includes a liquid injection pipeline, the first end of which is connected to the coolant pipeline, and the second end of which forms a liquid injection port, which is located on the outer wall of the housing. The injection line is higher than the coolant line, and the second end of the injection line is higher than the first end of the injection line.

2. The liquid-cooled unit as described in claim 1, characterized in that, The second end of the injection pipeline is provided with a first tee pipe. The first interface of the first tee pipe is connected to the second end of the injection pipeline, the second interface of the first tee pipe is connected to the injection port, and the third interface of the first tee pipe is connected to the vent valve.

3. The liquid-cooled unit as described in claim 2, characterized in that, The third port of the first tee pipe extends upward, and the exhaust valve is located at the top of the third port of the first tee pipe.

4. The liquid-cooled unit as described in claim 2, characterized in that, The injection port is equipped with a filter screen, which is sheet-shaped and can filter the liquid flowing through the injection port.

5. The liquid-cooled unit as described in claim 4, characterized in that, The second port of the first three-way pipe is connected to a liquid injection connector, the liquid injection port is formed inside the liquid injection connector, the filter screen is disposed inside the liquid injection connector, and the plane of the filter screen is arranged relatively perpendicular to the axial direction of the liquid injection connector.

6. The liquid-cooled unit as described in claim 1, characterized in that, The liquid cooling system includes an expansion tank, which is located inside the housing and is connected to the liquid injection pipeline via an expansion connecting pipe. The height of the expansion connection tube is lower than the height of the injection port.

7. The liquid-cooled unit as described in claim 6, characterized in that, The injection pipeline includes a first pipe section and a second pipe section connected in sequence, and a second tee pipe is provided between the first pipe section and the second pipe section; The first port of the second tee is connected to the first pipe segment, the second port of the second tee is connected to the second pipe segment, and the third port of the second tee is connected to the expansion connection pipe. The end of the first pipe segment furthest from the second tee pipe is connected to the coolant pipeline, and the end of the second pipe segment furthest from the second tee pipe is provided with the injection port.

8. The liquid-cooled unit as described in claim 7, characterized in that, In the direction from the expansion tank toward the second tee pipe, the expansion connecting pipe extends obliquely upward, such that the end of the expansion connecting pipe connected to the second tee pipe is higher than the end of the expansion connecting pipe connected to the expansion tank.

9. The liquid-cooled unit as described in claim 1, characterized in that, The coolant piping includes: The liquid outlet pipe has one end connected to the heat exchanger and the other end extending out of the housing to form the liquid outlet. The return liquid pipeline has one end connected to the pumping end of the water pump, and the other end of the return liquid pipeline extends out of the housing and forms the return liquid port. The discharge end of the water pump is connected to the heat exchanger through a liquid delivery pipeline; The first end of the injection line is connected to the return line, and the injection line is higher than the outlet line and the return line.

10. The liquid-cooled unit as described in claim 9, characterized in that, The return port is higher than the outlet, the end of the return pipeline forming the return port is higher than the end of the return pipeline connected to the water pump, and the first end of the injection pipeline is higher than the pumping end of the water pump.

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