Liquid cooling unit

Abstract

The utility model relates to a liquid cooling unit, the liquid cooling unit includes casing, compressor, condenser, heat exchanger, water pump, compressor, condenser and heat exchanger are sequentially connected 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 internal thread is equipped in liquid outlet, and the second internal thread is equipped in back liquid mouth, the first plug can be screwed in liquid outlet place through the first internal thread to block liquid outlet, the second plug can be screwed in back liquid mouth place through the second internal thread to block back liquid mouth, and then realize that the inside of cooling liquid pipeline forms closed system, is equipped with filling valve on cooling liquid pipeline, and filling valve is used to fill the pressure maintaining gas in cooling liquid pipeline, provides the sealing mode with pressure maintaining factory, arrives installation site, and whether the liquid cooling unit is leaked is judged quickly through the observation whether there is pressure in pipeline.

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, during transportation and handling, the liquid cooling units are easily subjected to impacts and vibrations, which can easily cause leaks in the pipes inside the liquid cooling units. It is difficult to detect the leaks in the first place and it is impossible to quickly and effectively determine whether there is a leak in the pipes. Utility Model Content

[0005] The purpose of this utility model is to provide a liquid cooling unit with a factory-sealed method that includes pressure holding, and to solve the problem of determining pipeline leakage in the liquid cooling unit.

[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 condenser disposed within the housing for exchanging heat with external air entering the housing; a compressor disposed within the housing and connected to the condenser; a heat exchanger disposed within the housing, forming a refrigeration system with the condenser and the compressor; and a water pump disposed within the housing, forming a liquid cooling system with the heat exchanger via a coolant pipeline; the refrigeration system and the... The liquid cooling system exchanges heat at the 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 outlet has a first internal thread, and the return port has a second internal thread; the liquid cooling system includes a first plug and a second plug, the first plug being threaded to the outlet via the first internal thread to seal the outlet; the second plug being threaded to the return port via the second internal thread to seal the return port; a charging valve is provided on the coolant pipeline, the charging valve being used to charge the coolant pipeline with pressure-holding gas.

[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. When the product leaves the factory, a first internal thread is provided in the liquid outlet, which, when used with a first plug, can seal the liquid outlet; a second internal thread is provided in the liquid return port, which, when used with a second plug, can seal the liquid return port, thereby forming a closed system inside the coolant piping; and then, pressure-holding gas is injected into the coolant piping through the charging valve, providing a factory-sealed method with pressure holding. Once the liquid chiller unit is transported to the installation site, an external airtightness testing instrument can be connected through the filling valve to test the airtightness of the pipeline on the liquid cooling system side. By observing whether there is pressure in the pipeline, it is possible to quickly determine whether the liquid chiller unit is leaking, thus solving the problem of determining pipeline leaks in the liquid chiller unit. This avoids the need to perform vacuuming and pressure testing on-site, saving time.

[0008] 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 inlet of the water pump, and the other end of which extends out of the housing and forms the return outlet; and the discharge end of the water pump is connected to the heat exchanger via a delivery pipeline.

[0009] 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.

[0010] In some embodiments of this application, the filling valve is located on the outer wall of the liquid outlet pipeline.

[0011] The above technical solution has the following advantages or beneficial effects: the filling valve can be used to fill the outlet pipe with pressure-holding gas, which then flows to the return pipe and fills the coolant pipe.

[0012] In some embodiments of this application, the end of the liquid outlet pipeline away from the heat exchanger is provided with a liquid outlet connector, the liquid outlet connector is provided on the outer wall of the housing, and the liquid outlet is formed inside the liquid outlet connector; the first internal thread is provided on the outer end side inside the liquid outlet connector.

[0013] The above-mentioned technical solution has the following advantages or beneficial effects: By fixing the liquid outlet connector to the outside of the housing, it is convenient to form the liquid outlet within the liquid outlet connector and fix the liquid outlet to the outer wall of the housing. The liquid outlet connector can be externally connected to various connectors via the first internal thread, thereby enabling the liquid outlet to be externally connected to various connectors.

[0014] In some embodiments of this application, a return connector is provided at the end of the return pipeline away from the water pump. The return connector is located on the outer wall of the housing, and the return port is formed inside the return connector. The second internal thread is located on the outer end side inside the return connector.

[0015] The above-mentioned technical solution has the following advantages or beneficial effects: By fixing the return liquid connector to the outside of the housing, it is convenient to form the return liquid port within the return liquid connector and fix the return liquid port to the outer wall of the housing. The return liquid connector can be externally connected to various connectors via the second internal thread, thereby enabling the return liquid port to be externally connected to various connectors.

[0016] In some embodiments of this application, the liquid cooling system further includes a liquid injection line, a first end of which is connected to the liquid return line, and a second end of which forms a liquid injection port, which is located on the outer wall of the housing; the liquid injection port is provided with a third internal thread; the liquid cooling system includes a third plug, which can be threaded to the liquid injection port through the third internal thread to seal the liquid injection port.

[0017] The above-mentioned technical solution has the following advantages or beneficial effects: An external liquid injection device can be connected through the injection port, allowing the external device to gradually inject coolant into the coolant pipeline through the injection port and injection line, thus filling the liquid cooling system pipeline. When the product leaves the factory, the injection port can be sealed with a third plug using a third internal thread, thereby achieving a sealed delivery of the injection pipeline, preventing dust and impurities from entering the injection pipeline, and sealing the liquid cooling system pipeline.

[0018] In some embodiments of this application, the injection line is higher than the return line and the outlet line, and the second end of the injection line is higher than the first end of the injection line.

[0019] The above-mentioned technical solution has the following advantages or beneficial effects: By making the second end of the injection pipe higher than the first end of the injection pipe, the injection port is located at the highest point of the liquid cooling system pipeline. During the injection process, the coolant preferentially fills other pipelines outside the injection pipe, that is, preferentially fills the return pipe and the outlet pipe, allowing air in the liquid cooling system pipeline to be discharged into the injection pipe and discharged through the injection port.

[0020] In some embodiments of this application, the second end of the injection pipeline is provided with an injection connector, the injection port is formed inside the injection connector, and the third internal thread is provided on the outer end side inside the injection connector.

[0021] The above technical solution has the following advantages or beneficial effects: the injection connector can be externally connected to various connectors through the third internal thread, thereby enabling the injection port to be externally connected to various connectors.

[0022] In some embodiments of this application, a first temperature sensor is provided on the liquid outlet pipeline, and a second temperature sensor is provided on the liquid return pipeline.

[0023] The above technical solution has the following advantages or beneficial effects: the first temperature sensor can be used to detect the temperature of the coolant in the outlet pipe, so as to detect the temperature of the coolant flowing out of the outlet. The second temperature sensor can be used to detect the temperature of the coolant in the return pipe, so as to detect the temperature of the coolant flowing into the return port.

[0024] In some embodiments of this application, a first pressure sensor is provided on the liquid outlet pipeline, and a second pressure sensor is provided on the liquid return pipeline.

[0025] The above technical solution has the following advantages or beneficial effects: the first pressure sensor can be used to detect the hydraulic pressure in the outlet pipeline, so as to detect whether the outlet pipeline and outlet are blocked. The second pressure sensor can be used to detect the hydraulic pressure in the return pipeline, so as to detect whether the return pipeline and return outlet are blocked. 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 6 A schematic diagram of the liquid outlet pipeline.

[0038] Figure 13 yes Figure 6A schematic diagram of the return liquid pipeline.

[0039] Figure 14 yes Figure 4 A schematic diagram of the structure in another state.

[0040] 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; 6011. First internal thread; 602. Liquid return port; 6021. Second internal thread; 61. Liquid outlet line; 6101. First temperature sensor; 6102. First pressure sensor; 611. PCT heater; 612. Liquid outlet connector; 613. 62. Filling valve; 62. Return line; 6201. Second temperature sensor; 6202. Second pressure sensor; 621. Return connector; 7. Injection line; 701. Injection port; 7011. Third internal thread; 702. Exhaust valve; 703. Filter screen; 71. First tee pipe; 72. Injection connector; 73. First pipe section; 74. Second pipe section; 75. Second tee pipe; 8. Expansion tank; 81. Expansion connecting pipe; 91. First plug; 92. Second plug; 93. Third plug. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Figure 1 This 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.

[0046] 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.

[0047] 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.

[0048] Figure 3 yes Figure 2 A partial structural diagram.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] like Figure 1 As 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.

[0054] 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.

[0055] 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.

[0056] Figure 4 yes Figure 3 A schematic diagram of the liquid cooling system.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Figure 5 yes Figure 4 A side view. Figure 6 yes Figure 5 A schematic diagram of its decomposed structure.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] like Figure 3 , Figure 4 and Figure 6As 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.

[0065] 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.

[0066] 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.

[0067] Figure 7 yes Figure 3 A partially enlarged structural diagram.

[0068] 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.

[0069] 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.

[0070] Figure 8 yes Figure 6 A schematic diagram of its decomposed structure.

[0071] like Figure 3 , Figure 7and Figure 8 As 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.

[0072] 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.

[0073] 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.

[0074] Figure 9 yes Figure 7 A partial structural diagram. Figure 10 yes Figure 9 A sectional view.

[0075] like Figure 9 and Figure 10 As shown, in some embodiments, a second filter 703 is provided inside the injection port 701. The second filter 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 second filter 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.

[0076] 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 second filter screen 703 is disposed within the liquid injection connector 72, and the plane of the second filter screen 703 is arranged relatively perpendicular to the axial direction of the liquid injection connector 72, thereby making the second 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 second filter screen 703, increasing the contact area between the second filter screen 703 and the coolant, thereby improving the filtration efficiency of the second filter screen 703.

[0077] Figure 11 yes Figure 6 A partial structural diagram.

[0078] 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.

[0079] 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.

[0080] like Figure 4 , Figure 6 and Figure 11 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.

[0081] 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.

[0082] like Figure 5 , Figure 6 and Figure 11 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.

[0083] like Figure 6 and Figure 11 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.

[0084] 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 end of the return port 602 and will not enter the water pump 5. The gas collects at the end of the return pipe 62 where the outlet port 601 is located, facilitating discharge through the injection pipe 7.

[0085] 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.

[0086] like Figure 4 and picture Figure 6 As shown, in some embodiments, a PCT heater 611 is provided on the outlet pipe 61. The PCT heater 611 can be used to heat the coolant, thereby raising the temperature of the coolant in the outlet pipe 61. In conjunction with the heat exchanger 4, it can be used to cool the coolant, thereby controlling the coolant output temperature range of the outlet 601 and realizing temperature control of external equipment.

[0087] Figure 12 yes Figure 6 A schematic diagram of the structure of the liquid outlet pipeline 61.

[0088] like Figure 12 As shown, in some embodiments, the outlet 601 is provided with a first internal thread 6011, and the outlet 601 can be externally connected to various connectors through the first internal thread 6011. For example, various standard connectors, including CQC standard connectors and SAE standard connectors, can be externally connected to the outlet 601.

[0089] In some embodiments, the liquid cooling system may include a first plug 91, which has an external thread that mates with a first internal thread 6011. The first plug 91 can be threaded onto the liquid outlet 601 via the first internal thread 6011 to seal the liquid outlet 601, thereby sealing the liquid outlet pipe 61. When the product equipment leaves the factory, the liquid outlet 601 can be sealed by the first internal thread 6011 and the first plug 91 to seal the liquid outlet pipe 61, thereby achieving a sealed delivery method for the liquid outlet pipe 61 and preventing dust and impurities from entering the liquid outlet pipe 61.

[0090] Figure 13 yes Figure 6 A schematic diagram of the structure of the return liquid pipeline 62.

[0091] like Figure 13 As shown, in some embodiments, the return port 602 is provided with a second internal thread 6021. The return port 602 can be externally connected to various connectors through the second internal thread 6021. For example, various standard connectors, including CQC standard connectors and SAE standard connectors, can be externally connected to the return port 602.

[0092] In some embodiments, the liquid cooling system may include a second plug 92, which has an external thread that mates with a second internal thread 6021. The second plug 92 can be threaded onto the return port 602 via the second internal thread 6021 to seal the return port 602, thereby sealing the return pipeline 62. When the product equipment leaves the factory, the return port 602 can be sealed by the second internal thread 6021 and the second plug 92, thereby achieving a sealed delivery of the return pipeline 62 and preventing dust and impurities from entering the return pipeline 62.

[0093] Figure 14 yes Figure 4 A schematic diagram of the structure in another state.

[0094] like Figure 12 , Figure 13 and Figure 14 As shown, in some embodiments, a charging valve 613 is provided on the coolant pipeline 60, which is used to charge pressure-holding gas into the coolant pipeline 60. When the first plug 91 and the second plug 92 respectively block the outlet 601 and the return port 602, the charging valve 613 can charge pressure-holding gas into the coolant pipeline 60. When the product leaves the factory, the outlet 601 is provided with a first internal thread 6011, which, together with the first plug 91, can block the outlet 601; the return port 602 is provided with a second internal thread 6021, which, together with the second plug 92, can block the return port 602, thereby forming a closed system inside the coolant pipeline 60; and then the charging valve 613 charges pressure-holding gas into the coolant pipeline 60, providing a sealing method with pressure holding at the factory. After the liquid chiller unit is transported to the installation site, an external airtightness testing instrument can be connected through the filling valve 613 to test the airtightness of the pipeline on the liquid cooling system side. By observing whether there is pressure in the pipeline, it is possible to quickly determine whether the liquid chiller unit is leaking, thus solving the problem of determining pipeline leaks in the liquid chiller unit. This avoids the need to perform vacuuming and pressure testing on-site, which helps save time.

[0095] In some embodiments, the filling valve 613 may be located on the outer wall of the outlet pipe 61. The filling valve 613 allows pressure-holding gas to be injected into the outlet pipe 61, which then flows to the return pipe 62, filling the coolant pipe 60 and the injection pipe 7. It should be noted that in other embodiments, the filling valve 613 may also be located on the outer wall of the return pipe 62.

[0096] In some embodiments, the liquid outlet line 61 can be arranged close to the air inlet 11 of the housing 1, so that the filling valve 613 can be arranged close to the air inlet 11 of the housing 1. When the air inlet 11 is opened, the filling valve 613 can be conveniently filled.

[0097] like Figure 6 and Figure 12 As shown, in some embodiments, the end of the liquid outlet pipe 61 furthest from the heat exchanger may be provided with a liquid outlet connector 612, which is located on the outer wall of the housing 1. A liquid outlet 601 may be formed within the liquid outlet connector 612. By fixing the liquid outlet connector 612 to the outside of the housing 1, it is convenient to form the liquid outlet 601 within the liquid outlet connector 612 and to fix the liquid outlet 601 to the outer wall of the housing 1.

[0098] In some embodiments, the first internal thread 6011 may be provided on the outer end side inside the liquid outlet connector 612, so that the liquid outlet connector 612 can be externally connected to various connectors through the first internal thread 6011, thereby enabling the liquid outlet 601 to be externally connected to various connectors.

[0099] like Figure 6 and Figure 12 As shown, in some embodiments, the end of the return line 62 furthest from the pump 5 may be provided with a return connector 621, which is located on the outer wall of the housing 1. A return port 602 may be formed within the return connector 621. By fixing the return connector 621 to the outside of the housing 1, it is convenient to form the return port 602 within the return connector 621 and to fix the return port 602 to the outer wall of the housing 1.

[0100] In some embodiments, the second internal thread 6021 may be provided on the outer end side inside the return connector 621, so that the return connector 621 can be externally connected to various connectors through the second internal thread 6021, thereby enabling the return port 602 to be externally connected to various connectors.

[0101] like Figure 9 and Figure 10 As shown, in some embodiments, the injection port 701 may be provided with a third internal thread 7011. Various connectors can be externally connected to the injection port 701 via the third internal thread 7011. For example, various standard connectors, including CQC standard connectors and SAE standard connectors, can be externally connected to the outlet port 601.

[0102] In some embodiments, the liquid cooling system may include a third plug 93, which has an external thread that mates with a third internal thread 7011. The third plug 93 can be threaded onto the injection port 701 via the third internal thread 7011 to seal the injection port 701, thereby sealing the injection pipeline 7. When the product equipment leaves the factory, the injection port 701 can seal the injection pipeline 7 via the third internal thread 7011 and the third plug 93, thereby achieving a sealed delivery of the injection pipeline 7, preventing dust and impurities from entering the injection pipeline 7, and sealing the pipeline of the liquid cooling system.

[0103] like Figure 9 and Figure 10 As shown, in some embodiments, the second end of the injection pipeline 7 is provided with an injection connector 72, an injection port 701 is formed inside the injection connector 72, and a third internal thread 7011 is provided on the outer end side inside the injection connector 72, so that the injection connector 72 can be externally connected to various connectors through the third internal thread 7011, thereby enabling the injection port 701 to be externally connected to various connectors.

[0104] like Figure 6 , Figure 12 and Figure 13As shown, in some embodiments, a first temperature sensor 6101 may be provided on the outlet pipe 61. The first temperature sensor 6101 can be used to detect the temperature of the coolant in the outlet pipe 61, so as to detect the temperature of the coolant flowing out of the outlet 601. A second temperature sensor 6201 may be provided on the return pipe 62. The second temperature sensor 6201 can be used to detect the temperature of the coolant in the return pipe 62, so as to detect the temperature of the coolant flowing into the return outlet 602. like Figure 6 , Figure 12 and Figure 13 As shown, in some embodiments, a first pressure sensor 6102 may be provided on the outlet pipe 61. The first pressure sensor 6102 can be used to detect the hydraulic pressure in the outlet pipe 61, so as to detect whether the outlet pipe 61 and the outlet 601 are blocked. A second pressure sensor 6202 may be provided on the return pipe 62. The second pressure sensor 6202 can be used to detect the hydraulic pressure in the return pipe 62, so as to detect whether the return pipe 62 and the return outlet 602 are blocked.

[0105] 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, which are located on the outer wall of the housing; the outlet has a first internal thread and the return port has a second internal thread. The liquid cooling system includes a first plug and a second plug. The first plug can be threaded to the liquid outlet via the first internal thread to seal the liquid outlet. The second plug can be threaded to the liquid return port via the second internal thread to seal the liquid return port. The coolant pipeline is equipped with a filling valve, which is used to fill the coolant pipeline with pressure-maintaining gas.

2. 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 inlet of the water pump and the other end extending out of the housing to form the return liquid port. The discharge end of the water pump is connected to the heat exchanger via a liquid delivery pipeline.

3. The liquid-cooled unit as described in claim 2, characterized in that, The filling valve is located on the outer wall of the liquid outlet pipeline.

4. The liquid-cooled unit as described in claim 2, characterized in that, The liquid outlet pipe is provided with a liquid outlet connector at the end away from the heat exchanger. The liquid outlet connector is located on the outer wall of the housing, and the liquid outlet is formed inside the liquid outlet connector. The first internal thread is located on the outer end side inside the liquid outlet connector.

5. The liquid-cooled unit as described in claim 2, characterized in that, The return pipe is provided with a return connector at the end away from the water pump. The return connector is located on the outer wall of the housing, and the return port is formed inside the return connector. The second internal thread is located on the outer end side inside the return connector.

6. The liquid-cooled unit as described in claim 2, characterized in that, The liquid cooling system also includes a liquid injection line, the first end of which is connected to the liquid return line, and the second end of which forms a liquid injection port, which is located on the outer wall of the housing; the liquid injection port is provided with a third internal thread. The liquid cooling system includes a third plug, which can be threaded onto the injection port via the third internal thread to seal the injection port.

7. The liquid-cooled unit as described in claim 6, characterized in that, The injection line is higher than the return line and the outlet line, and the second end of the injection line is higher than the first end of the injection line.

8. The liquid-cooled unit as described in claim 6, characterized in that, The second end of the injection pipeline is provided with an injection connector, the injection port is formed inside the injection connector, and the third internal thread is provided on the outer end side inside the injection connector.

9. The liquid-cooled unit as described in claim 2, characterized in that, A first temperature sensor is installed on the liquid outlet pipe, and a second temperature sensor is installed on the liquid return pipe.

10. The liquid-cooled unit as described in claim 2, characterized in that, A first pressure sensor is installed on the liquid outlet pipe, and a second pressure sensor is installed on the liquid return pipe.

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