Liquid cooling machine started at low temperature

Abstract

The utility model belongs to the field of liquid cooling machines, and discloses a liquid cooling machine started at a low temperature. Comprising a shell, a circuit board, a conveying unit, an electronic temperature control valve and a heat dissipation unit. The circuit board is arranged at one end of the shell and fixedly connected with the shell, the conveying unit is fixedly connected to one side of the shell, a connecting pipe is arranged on the conveying unit and used for being connected with a main pipeline, one end of the main pipeline is fixedly connected with a groove, and the other end of the main pipeline is connected with one end of each branch pipeline through a conversion piece. The electronic temperature control valve is arranged between the branch pipelines, the other ends of the branch pipelines are connected with the liquid cooling charging gun through one path of the change-over valve, the other path of the change-over valve is connected with the heat dissipation unit, the electronic temperature control valve is fixed to one side of the heat dissipation unit, and the heat dissipation unit is arranged in the shell and fixedly connected with the shell through a fixing piece. The technical problems that in the prior art, a liquid cooling gun line is large in flow resistance at the low temperature, and a pump is difficult to start are solved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid chiller technology and relates to a liquid chiller with low-temperature start-up. Background Technology

[0002] In recent years, with the continuous increase in the driving range of electric vehicles, the demand for charging has become increasingly strong. According to a survey of domestic automakers, most automakers plan to increase the charging current to 500A by 2025. Regarding power batteries, some battery companies have already achieved mass production of power batteries with 3C rate charging, ensuring charging safety through improved system thermal management and guaranteeing battery lifespan by adopting reasonable charging ranges and strategies. In terms of charging infrastructure, new charging technologies, represented by charging stacks, have achieved the integration of charging modules and dynamic allocation of charging power, with charging power reaching 350kW and above. Based on the above charging demands and the conditions available to vehicles and power batteries, the development of higher-power fast charging has become a recognized development direction in the industry, giving rise to high-power, high-current charging applications.

[0003] Currently, standard charging cables requiring an outer diameter of around 42mm are needed to meet the national standard of 250A charging current. This results in thicker wires, greater weight, and a poor user experience. Liquid-cooled charging terminals, using liquid-cooled charging guns, offer advantages such as thinner wires, lighter weight, higher charging current, and better heat dissipation. However, the coolant used in liquid-cooled charging cables has high viscosity at low temperatures, leading to greater flow resistance in the entire liquid cooling system. Furthermore, starting the pump in the liquid cooling system requires higher pressure, which creates design redundancy. Therefore, a low-temperature start-up liquid cooler is needed to address the problem of high flow resistance and pump start-up difficulties at low temperatures. Utility Model Content

[0004] The purpose of this invention is to provide a liquid cooler that starts at low temperatures, thereby solving the technical problem in the prior art where the liquid cooling gun line has high flow resistance at low temperatures, making it difficult for the pump to start.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: A low-temperature start-up liquid cooler includes a housing, a circuit board, a conveying unit, an electronic temperature control valve, and a heat dissipation unit; the circuit board is disposed at one end of the housing and is fixedly connected to the housing; the conveying unit is fixedly connected to one side of the housing; the conveying unit is provided with a connecting pipe for connecting to a main pipe; one end of the main pipe is fixedly connected to a groove, and the other end is connected to one end of a multi-way branch pipe through a conversion component; the electronic temperature control valve is disposed between one branch pipe; the other end of the multi-way branch pipe is connected to the liquid cooling charging gun through a conversion valve, and the other end is connected to the heat dissipation unit; the electronic temperature control valve is fixed to one side of the heat dissipation unit; the heat dissipation unit is disposed inside the housing and is fixedly connected to the housing through a fixing component.

[0006] Furthermore, the conveying unit includes a water tank and a pump; the water tank is located at one end of the housing near the circuit board, the pump is located at the lower end of the water tank, and the water tank and the pump are connected.

[0007] Furthermore, a water tank cover is provided at the upper end of the water tank, and the water tank cover is threadedly connected to the water tank.

[0008] Furthermore, a connector is provided on the outer wall of the main pipe, and the connector is detachably connected to the connecting pipe.

[0009] Furthermore, the heat dissipation unit includes a heat sink, a fan, and a protective cover; the protective cover is disposed at one end of the housing, the heat sink is disposed at the other end of the housing, and both are fixedly connected to the housing by fasteners; the fan is disposed between the heat sink and the protective cover; and the protective cover is connected to the circuit board by wires.

[0010] Furthermore, the axes of the fan and the protective cover coincide with each other.

[0011] Furthermore, the fastener is located on the side of the protective cover away from the fan, with one end passing through the protective cover and fixedly connected to the housing.

[0012] Furthermore, the switching valve is a three-way valve, which includes a first interface, a second interface, and a third interface. The second interface and the third interface are arranged side by side. The second interface is connected to the liquid-cooled charging gun, the third interface is connected to the heat dissipation unit, and the first interface is fixedly connected to the branch pipe.

[0013] Furthermore, the connector is a nut.

[0014] Furthermore, the pump is equipped with sensors to monitor the temperature, pressure, and flow rate of the coolant.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] This utility model discloses a low-temperature start-up liquid cooler, comprising a housing, a circuit board, a delivery unit, an electronic temperature control valve, and a heat dissipation unit. The delivery unit includes a water tank and a pump, and the heat dissipation unit includes heat sinks, a fan, and a protective cover. The water tank is installed on one side of the housing, the circuit board is installed at one end of the housing near the water tank, and the pump is installed at the lower end of the water tank. In low-temperature conditions, the coolant in the water tank is connected to a conversion component through a main pipe. The two outlets of the conversion component are connected to branch pipes. One branch pipe is connected to an electronic temperature control valve, and the outlets of the two branch pipes are connected to the first interface of the conversion valve. Each conversion valve has two outlets: a second interface and a third interface. The second interface is connected to the liquid cooling charging gun, and the third interface is connected to the heat sink. During charging, the temperature of the liquid cooling charging gun gradually increases, reducing the viscosity of the coolant. When the actual temperature detected by the sensor in the pump is greater than a preset value, the circuit board controls the electronic temperature control valve to close, further reducing the flow resistance of the entire liquid cooling system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a low-temperature start-up liquid cooler according to the present invention.

[0019] Figure label:

[0020] 1-Housing; 2-Circuit board; 3-Conveying unit; 31-Water tank; 32-Pump; 4-Electronic temperature control valve; 5-Heat dissipation unit; 51-Heat dissipation fin; 52-Fan; 53-Protective cover. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, such as a process, method, system, product, or apparatus comprising a series of steps or units, are not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings:

[0024] Example 1

[0025] This utility model provides a low-temperature start-up liquid chiller, including a housing 1, a circuit board 2, a conveying unit 3, an electronic temperature control valve 4, and a heat dissipation unit 5. The circuit board 2 is disposed at one end of the housing 1 and is fixedly connected to the housing 1. The conveying unit 3 is fixedly connected to one side of the housing 1 and is provided with a connecting pipe for connecting to a main pipe. One end of the main pipe is fixedly connected to a groove, and the other end is connected to one end of a multi-way branch pipe through a conversion component. The electronic temperature control valve 4 is disposed between a branch pipe, and the other end of the multi-way branch pipe is connected to the conveying unit 3 and the heat dissipation unit 5 respectively through a conversion valve. The electronic temperature control valve 4 is fixed to one side of the heat dissipation unit 5, and the heat dissipation unit 5 is disposed inside the housing 1 and is fixedly connected to the housing 1 through a fixing component.

[0026] Specifically, such as Figure 1 As shown, the delivery unit 3 includes a water tank 31 and a pump 32, and the heat dissipation unit includes a heat sink 51, a fan 52, and a protective cover 53. The circuit board 2 is fixedly installed on the upper side of one side of the housing 1. In this embodiment, the circuit board 2 is installed near the water tank 31. The fixed connection includes welding, threaded connection, detachable connection, and snap-fit. Welding or detachable connection can be used here, selected according to the actual situation. The water tank 31 is installed on one side of the housing 1, and a water tank cover is provided at the upper end of the water tank 31. When coolant needs to be added, the water tank cover is manually rotated; otherwise, the water tank cover is threadedly connected to the water tank 31. The pump 32 is installed at the lower end of the water tank 31, and the upper end of the pump 32 is connected to the lower end of the water tank 31. When the pump 32 starts, it draws liquid from the bottom of the water tank 31, then increases the pressure or potential energy of the liquid through the mechanical action inside the pump 32, and finally delivers the liquid to the main pipeline through the connecting pipe provided on the pump 32.

[0027] A sensor is installed inside pump 32 to monitor the temperature, pressure, and flow rate of the coolant, which is installed in water tank 31. The sensor continuously monitors the temperature, pressure, and flow rate of the coolant, ensuring that the system can acquire this data in real time. When the temperature, pressure, or flow rate of the coolant becomes abnormal, the sensor can quickly detect these changes and take the next step, closing the electronic temperature control valve 4. The entire process can be precisely controlled.

[0028] A connector is fitted onto the outer wall of one end of the main pipe. The main pipe is threadedly connected to the connecting pipe via the connector and tightened. As can be seen in the figure, the main pipe bends and turns in the middle. Figure 1 On the left side, the other end of the main pipe is connected to a converter, splitting into two branches, which are then connected by branch pipes. An electronic temperature control valve 4 is positioned between one of the branch pipes. One branch pipe connects to the heat sink 51 via a converter valve, and the other connects to the pump 32 via a converter valve. In this embodiment, the converter valve is a three-way valve, consisting of a first port, a second port, and a third port. The diameter of the first port is larger than the diameters of the second and third ports. The first port is used to connect to the branch pipe, while the second and third ports are arranged side-by-side. It should be noted that the converter valves on both branch pipes have the same structural dimensions. The second port is used to connect to the liquid-cooled charging gun, and the third port is connected to the heat sink 51.

[0029] The heat sink 51, fan 52, and protective cover 53 are mounted on the housing 1 from front to back and are all detachably connected. The heat sink 51 is located at the front and uses its large surface area to absorb and disperse the heat generated by the heat source. The heat sink 51 is usually made of a material with high thermal conductivity, such as aluminum or copper, to transfer heat more effectively. The fan 52 generates airflow by rotating, blowing the heat on the heat sink 51 into the air. The fan speed and airflow force directly affect the heat dissipation effect, quickly carrying hot air away from the area around the heat sink 51 to form a continuous heat dissipation cycle. The protective cover 53 serves two purposes: first, to protect the fan 52 from direct impact and damage from external objects; and second, to guide and optimize the airflow path, ensuring that the airflow generated by the fan 52 can efficiently remove the heat from the heat sink.

[0030] This utility model discloses a low-temperature start-up liquid chiller that effectively reduces flow resistance without increasing power consumption and solves the problem of excessive output pressure when pump 32 starts, thereby protecting the pressure resistance and long-term reliability of the main pipeline and branch pipelines.

[0031] Example 2

[0032] The present invention discloses a method for using a low-temperature start-up liquid chiller, comprising the following steps: First, coolant is added to the water tank 31, or if coolant is already present in the water tank 31, the liquid chiller is started. At low temperatures, the viscosity of the coolant is high, resulting in greater resistance. The pump requires higher pressure to start, exceeding its output capacity. Upon initial start-up, a portion of the coolant in the pump 32 flows through a branch pipe into the electronic temperature control valve 4, then into the first port of the switching valve, flows out from the second port of the switching valve into the liquid-cooled charging gun, and flows out from the third port of the switching valve into the heat sink 51. As charging progresses, the charging gun wires heat up, gradually increasing the temperature of the coolant in the water tank 31, thus gradually reducing its viscosity. When the viscosity decreases, the flow resistance decreases, and the pump 32 has started, no longer requiring higher pressure. When the electronic temperature control valve 4 detects that the coolant temperature exceeds 30°C, it closes via the circuit board 2, allowing the coolant to flow through another branch pipe.

[0033] In summary, when the output capacity of pump 32 is sufficient to drive the entire liquid chiller, the electronic temperature control valve 4 is turned off, and at low temperatures, the system operates through two branch pipelines to reduce losses.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A liquid chiller with low-temperature start-up, characterized in that: It includes a housing (1), a circuit board (2), a conveying unit (3), an electronic temperature control valve (4), and a heat dissipation unit (5); The circuit board (2) is set at one end of the housing (1) and is fixedly connected to the housing (1). The conveying unit (3) is fixedly connected to one side of the housing (1). The conveying unit (3) is provided with a connecting pipe for connecting the main pipe. One end of the main pipe is fixedly connected to the groove, and the other end is connected to one end of the multi-way branch pipe through a conversion component. The electronic temperature control valve (4) is set between one branch pipe. The other end of the multi-way branch pipe is connected to the liquid-cooled charging gun through a conversion valve, and the other end is connected to the heat dissipation unit (5). The electronic temperature control valve (4) is fixed on one side of the heat dissipation unit (5). The heat dissipation unit (5) is set inside the housing (1) and is fixedly connected to the housing (1) through a fixing component. The switching valve is a three-way valve, which includes a first interface, a second interface and a third interface. The second interface and the third interface are arranged side by side. The second interface is connected to the liquid-cooled charging gun, the third interface is connected to the heat dissipation unit (5), and the first interface is fixedly connected to the branch pipe. The heat dissipation unit (5) includes a heat sink (51), a fan (52), and a protective cover (53).

2. The cryogenic start-up liquid chiller according to claim 1, characterized in that: The conveying unit (3) includes a water tank (31) and a pump (32); The water tank (31) is located at one end of the housing (1) near the circuit board (2), and the pump (32) is located at the lower end of the water tank (31), and the water tank (31) and the pump (32) are connected.

3. The low-temperature start-up liquid chiller according to claim 2, characterized in that: The water tank (31) is provided with a water tank cover at the upper end, and the water tank cover is threadedly connected to the water tank (31).

4. The low-temperature start-up liquid chiller according to claim 2, characterized in that: The outer wall of the main pipe is provided with a connector, which is detachably connected to the connecting pipe.

5. The cryogenic start-up liquid chiller according to claim 1, characterized in that: The protective cover (53) is located at one end of the housing (1), and the heat sink (51) is located at the other end of the housing (1). Both are fixedly connected to the housing (1) by fasteners. The fan (52) is located between the heat sink (51) and the protective cover (53). The protective cover (53) is connected to the circuit board (2) by wires.

6. The cryogenic start-up liquid chiller according to claim 5, characterized in that: The axes of the fan (52) and the protective cover (53) coincide.

7. The low-temperature start-up liquid chiller according to claim 5, characterized in that: The fastener is located on the side of the protective cover (53) away from the fan (52), and one end of it passes through the protective cover (53) and is fixedly connected to the housing (1).

8. The cryogenic start-up liquid chiller according to claim 4, characterized in that: The connector is a nut.

9. The cryogenic start-up liquid chiller according to claim 2, characterized in that: The pump (32) is equipped with a sensor to monitor the temperature, pressure and flow rate of the coolant.

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