Liquid cooling unit

Abstract

The utility model relates to a kind of 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 refrigeration system, water pump is connected with heat exchanger by cooling liquid pipeline to form liquid cooling system, refrigeration system and liquid cooling system heat exchange at heat exchanger;The two ends of cooling liquid pipeline form liquid outlet and back liquid port, and step portion is equipped in back liquid port, first filter screen is equipped in back liquid port, first filter screen is installed at step portion, first filter screen is sheet, first filter screen can filter liquid flowing through back liquid port, by being equipped with step portion in back liquid port, it can be positioned and installed in back liquid port with sheet first filter screen, solve the cooling liquid filtration problem of liquid cooling unit. The scheme is easy to operate, can save volume, save the installation space of filter, to reduce space occupation, conducive to reducing the overall volume of liquid cooling unit.

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, Y-type filters are usually used to filter the coolant, but Y-type filters have a large structural size, require a large space, and are inconvenient to install. Utility Model Content

[0005] The purpose of this invention is to provide a liquid cooling unit to solve the problem of coolant filtration in liquid cooling units and reduce space occupation.

[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. The pump is located inside the casing, and the water pump forms a liquid cooling system with the heat exchanger through a coolant pipeline; the refrigeration system and the liquid cooling system exchange heat at the heat exchanger; wherein, the two ends of the coolant pipeline form an outlet and a return port, and the outlet and the return port are located on the outer wall of the casing; the return port has a stepped portion, and a first filter screen is installed in the return port. The first filter screen is plate-shaped and can filter the liquid flowing through the return port.

[0007] The above-mentioned 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. The stepped section inside the return port facilitates the positioning and installation of the sheet-like first filter screen within the return port, solving the coolant filtration problem of the liquid-cooled unit. This solution is easy to operate, saves volume, saves installation space for the filter, and thus reduces space occupation, contributing to a smaller overall size of the liquid-cooled unit.

[0008] In some embodiments of this application, the plane containing the first filter screen is arranged perpendicularly to the axial direction of the return port.

[0009] The above-mentioned technical solution has the following advantages or beneficial effects: During the return process, when the coolant flows through the return port, the coolant can flow vertically through the first filter screen, thereby increasing the contact area between the first filter screen and the coolant, and thus improving the filtration efficiency of the first filter screen.

[0010] 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.

[0011] 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.

[0012] 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 stepped portion is located inside the return connector and is located on the side of the return port closer to the water pump.

[0013] The above-mentioned technical solution has the following advantages or beneficial effects: by fixing the return liquid connector to the outside of the machine housing, it is convenient to form the return liquid port inside the return liquid connector and fix the return liquid port on the outer wall of the machine housing. At the same time, it is also convenient to set the step part inside the return liquid connector. The first filter screen can be installed from the end of the return liquid connector near the water pump inside the return liquid connector and then fixed on the step part, thereby making it convenient to quickly fix the first filter screen inside the return liquid connector, which is convenient for production and processing.

[0014] In some embodiments of this application, the return connector is provided with a variable diameter section, which is located on the side of the return port near the water pump; the diameter of the variable diameter section gradually decreases in the direction toward the outlet; and the stepped portion is formed at the end of the variable diameter section near the water pump.

[0015] The above technical solution has the following advantages or beneficial effects: the step can be formed at the end of the variable diameter section near the water pump. When the first filter screen is fixed on the step, the space between the first filter screen and the variable diameter section is prone to forming a sedimentation point. Impurities in the coolant flowing through the first filter screen are prone to accumulate at the sedimentation point of the variable diameter section.

[0016] In some embodiments of this application, the stepped portion is annular and circumferentially arranged on the inner peripheral wall of the return fluid connector.

[0017] The above-mentioned technical solution has the following advantages or beneficial effects: the ring-shaped arrangement of the stepped part facilitates full contact and connection between the peripheral edge of the first filter screen and the ring-shaped stepped part, which helps to improve the installation stability of the first filter screen.

[0018] In some embodiments of this application, the peripheral edge of the first filter screen is welded and fixed to the stepped portion.

[0019] The above-mentioned technical solution has the following advantages or beneficial effects: by welding and fixing the peripheral edge of the first filter screen to the stepped part, the structural stability of the first filter screen in the return liquid port can be improved.

[0020] In some embodiments of this application, the return pipeline includes: a return interface pipe, one end of which is coaxially connected to the return connector; and a return connection pipe, one end of which is connected to the other end of the return interface pipe, and the other end of which is connected to the pumping end of the water pump; the return interface pipe is higher than the pumping end of the water pump, and the end of the return connection pipe connected to the return interface pipe is higher than the end of the return connection pipe connected to the water pump.

[0021] The above-mentioned technical solution has the following advantages or beneficial effects: the gas generated in the return pipeline can move towards the return interface pipe, and then towards one end of the return port, without entering the water pump through the return connection pipe. The gas can collect at the return interface pipe, making it easy to discharge through the injection pipeline.

[0022] 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 line is higher than the liquid return line and the liquid outlet line, and the second end of the liquid injection line is higher than the first end of the liquid injection line.

[0023] 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.

[0024] 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 a second filter screen is provided inside the injection connector, which can filter the liquid flowing through the injection port.

[0025] The above-mentioned technical solution has the following advantages or beneficial effects: By setting the second filter screen inside the liquid injection joint, during the liquid injection process, when the coolant flows through the liquid injection port, the coolant can flow vertically through the second filter screen, thereby increasing the contact area between the second filter screen and the coolant, and thus improving the filtration efficiency of the second filter screen. 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 6yes 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 the return liquid pipeline.

[0038] Figure 13 yes Figure 12 A sectional view.

[0039] Figure 14 yes Figure 13 A schematic diagram of the intermediate return liquid connector and the first filter screen.

[0040] Figure 15 yes Figure 14 A schematic diagram of the structure with the first filter screen removed.

[0041] 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 pipeline; 60. Coolant pipeline; 601. Liquid outlet; 602. Liquid return port; 603. First filter screen; 604. Step section; 605. Variable diameter section; 61. Liquid outlet pipeline; 6101. First temperature sensor; 6102. First pressure sensor; 611. PCT heater. 62. Return liquid pipeline; 6201. Second temperature sensor; 6202. Second pressure sensor; 621. Return liquid connector; 622. Return liquid interface pipe; 6221. Connecting part; 623. Return liquid connecting pipe; 7. Injection pipeline; 701. Injection port; 702. Exhaust valve; 703. Second 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. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] like Figure 1As 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.

[0049] Figure 3 yes Figure 2 A partial structural diagram.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figure 2As 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.

[0056] 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.

[0057] Figure 4 yes Figure 3 A schematic diagram of the liquid cooling system.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Figure 5 yes Figure 4 A side view. Figure 6 yes Figure 5 A schematic diagram of its decomposed structure.

[0062] like Figure 4 and Figure 6As 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Figure 7 yes Figure 3 A partially enlarged structural diagram.

[0069] 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.

[0070] 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.

[0071] Figure 8 yes Figure 6 A schematic diagram of its decomposed structure.

[0072] like Figure 3 , Figure 7 and 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.

[0073] 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.

[0074] 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.

[0075] Figure 9 yes Figure 7 A partial structural diagram. Figure 10 yes Figure 9 A sectional view.

[0076] 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.

[0077] 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.

[0078] Figure 11 yes Figure 6 A partial structural diagram.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 achieving temperature control of external equipment.

[0088] Figure 12 yes Figure 11 A schematic diagram of the structure of the return liquid pipeline 62.

[0089] like Figure 4 , Figure 6 and Figure 12 As shown, in some embodiments, a first filter screen 603 is provided inside the return port 602. The first filter screen 603 may be sheet-like and can filter the liquid flowing through the return port 602. When the coolant exchanges heat with the external equipment and returns to the return pipeline 62 through the return port 602, the first filter screen 603 can filter the liquid flowing through the return port 602, improving the reliability of the return process and preventing impurities from the external equipment from entering the liquid cooling system, thereby preventing impurities from clogging the water pump 5.

[0090] Figure 13 yes Figure 12 A sectional view. Figure 14 yes Figure 13 A schematic diagram of the intermediate return liquid connector 621 and the first filter screen 603. Figure 15 yes Figure 14 A schematic diagram of the structure with the first filter screen 603 removed.

[0091] like Figure 13 , Figure 14 and Figure 15 As shown, in some embodiments, a stepped portion 604 is provided inside the return port 602, and the first filter screen 603 is installed at the stepped portion 604. Thus, by providing the stepped portion 604 inside the return port 602, the sheet-like first filter screen 603 can be easily positioned and installed inside the return port 602, solving the coolant filtration problem of the liquid-cooled unit. This solution is easy to operate, saves volume, saves installation space for the filter, and thus reduces space occupation, which is beneficial for reducing the overall size of the liquid-cooled unit.

[0092] In some embodiments, the plane of the first filter screen 603 is arranged perpendicularly to the axial direction of the return port 602. During the return process, when the coolant flows through the return port 602, the coolant can flow perpendicularly through the first filter screen 603, increasing the contact area between the first filter screen 603 and the coolant, thereby improving the filtration efficiency of the first filter screen 603.

[0093] In some embodiments, a return connector 621 may be provided at the end of the return pipe 62 away from the water pump 5. The return connector 621 is located on the outer wall of the housing 1, and the return port 602 is formed inside the return connector 621. A step portion 604 may be provided inside the return connector 621 and on the side of the return port 602 closer to the water pump 5. By fixing the return connector 621 to the outside of the housing 1, it is convenient to form the return port 602 inside the return connector 621 and fix the return port 602 to the outer wall of the housing 1. At the same time, it is also convenient to provide the step portion 604 inside the return connector 621. The first filter screen 603 can be installed from the end of the return connector 621 closer to the water pump 5 into the return connector 621 and then fixed to the step portion 604, thereby facilitating the quick fixing of the first filter screen 603 inside the return connector 621 and facilitating production and processing.

[0094] like Figure 14 and Figure 15 As shown, in some embodiments, a reducing section 605 may be provided within the return connector 621, located on the side of the return port 602 near the water pump 5. The diameter of the reducing section 605 gradually decreases in the direction towards the outlet 601. A step portion 604 may be formed at the end of the reducing section 605 near the water pump 5. When the first filter screen 603 is fixed to the step portion 604, a sedimentation point easily forms in the space between the first filter screen 603 and the reducing section 605, and impurities in the coolant flowing through the first filter screen 603 easily accumulate at the sedimentation point of the reducing section 605.

[0095] In some embodiments, the stepped portion 604 is annular and circumferentially arranged on the inner peripheral wall of the return fluid connector 621. The annular arrangement of the stepped portion 604 facilitates full contact and connection between the peripheral edge of the first filter screen 603 and the annular stepped portion 604, which helps to improve the installation stability of the first filter screen 603.

[0096] In some embodiments, the peripheral edge of the first filter screen 603 is welded and fixed to the stepped portion 604, thereby improving the structural stability of the first filter screen 603 within the return port 602. It should be noted that in other embodiments, the peripheral edge of the first filter screen 603 may also be snapped or glued to the stepped portion 604.

[0097] like Figure 12 and Figure 13 As shown, in some embodiments, the return line 62 may include a return interface pipe 622, one end of which is coaxially connected to the return connector 621. The end of the return interface pipe 622 and the end of the return connector 621 may be welded together as one unit.

[0098] like Figure 11 and Figure 12 As shown, in some embodiments, the injection line 7 can be connected to the return interface pipe 622. A connecting portion 6221 can be provided on the outer wall of the return interface pipe 622. The first end of the injection line 7 can be connected to the connecting portion 6221, thereby communicating with the interior of the return interface pipe 622.

[0099] like Figure 12 and Figure 13 As shown, in some embodiments, the return line 62 may include a return connection pipe 623, one end of which is connected to the other end of the return interface pipe 622, and the other end of which may be connected to the pumping end of the water pump 5. The return connection pipe 623 may be a bent pipe or a flexible hose.

[0100] like Figure 6 and Figure 12 As shown, in some embodiments, the return interface pipe 622 is higher than the pumping end of the water pump 5, and the end of the return connection pipe 623 connected to the return interface pipe 622 is higher than the end of the return connection pipe 623 connected to the water pump 5. In this way, the gas generated in the return pipeline 62 can move towards the return interface pipe 622, and then towards the return port 602, without entering the water pump 5 through the return connection pipe 623. The gas can collect at the return interface pipe 622, facilitating its discharge through the injection pipeline 7.

[0101] like Figure 6 and Figure 12As 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 port 602. The second temperature sensor 6201 may be provided on the return interface pipe 622.

[0102] like Figure 6 and Figure 12 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. The second pressure sensor 6202 may be provided on the return interface pipe 622.

[0103] 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 cooling unit, characterized by, 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 return port has a stepped portion and a first filter screen. The first filter screen is sheet-shaped and installed at the stepped portion. The first filter screen can filter the liquid flowing through the return port.

2. The liquid chiller unit of claim 1, wherein, The plane containing the first filter screen is arranged perpendicularly to the axial direction of the return port.

3. The liquid chiller unit of claim 1, wherein, 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.

4. The liquid chiller unit of claim 3, wherein, 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 stepped portion is located inside the return liquid connector and on the side of the return liquid port closer to the water pump.

5. The liquid chiller unit of claim 4, wherein, The return fluid connector is provided with a variable diameter section, which is located on the side of the return fluid port closer to the water pump. The diameter of the variable diameter section gradually decreases in the direction toward the liquid outlet; The stepped portion is formed at one end of the variable diameter section near the water pump.

6. The liquid chiller unit of claim 4, wherein, The stepped portion is annular and circumferentially arranged on the inner peripheral wall of the return fluid connector.

7. The liquid chiller unit of claim 6, wherein, The peripheral edge of the first filter screen is welded and fixed to the stepped portion.

8. The liquid chiller unit of claim 4, wherein, The return pipeline includes: A return liquid interface pipe, one end of which is coaxially connected to the return liquid connector; A return liquid connection pipe, one end of which is connected to the other end of the return liquid interface pipe, and the other end of which is connected to the pumping end of the water pump. The return liquid interface pipe is higher than the pumping end of the water pump, and the end of the return liquid connection pipe connected to the return liquid interface pipe is higher than the end of the return liquid connection pipe connected to the water pump.

9. The liquid chiller unit of claim 3 wherein, The liquid cooling system also includes a liquid injection pipeline, the first end of which is connected to the liquid return 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 return line and the outlet line, and the second end of the injection line is higher than the first end of the injection line.

10. The liquid chiller unit of claim 9, wherein, The second end of the liquid injection pipeline is provided with a liquid injection connector, the liquid injection port is formed in the liquid injection connector, the liquid injection connector is provided with a second filter screen, and the second filter screen can filter the liquid flowing through the liquid injection port.

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