Liquid cooling circulation device and energy storage converter

Abstract

The utility model discloses a liquid cooling circulation device and an energy storage converter, the liquid cooling circulation device comprises a liquid cooling circulation pipeline, a circulation pump and an exhaust structure, the liquid cooling circulation pipeline is provided with a liquid supply port and a liquid return port which are used for being connected with the outside, and a switch valve is connected in series between the liquid supply port and the liquid return port. The switch valve is suitable for being closed before first-time liquid injection and opened after liquid injection is completed; the circulating pump is connected in series between the switching valve and the liquid supply port and is used for driving the cooling liquid to flow to the liquid supply port from the liquid return port; the exhaust structure is connected to the two ends of the switch valve in parallel and provided with a gas-liquid separator, and an exhaust valve is arranged at the top end of the gas-liquid separator. The energy storage converter comprises the liquid cooling circulation device. The circulating pump is not prone to cavitation or blocking collision.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling, in particular to a liquid cooling circulation device and an energy storage converter. Background Art

[0002] Liquid cooling systems offer strong heat exchange capabilities and are widely used in various fields. These systems typically feature a circulating pump to drive the coolant flow through the cooling pipes. Because these systems require large quantities of coolant, the pipes must be pre-filled with liquid during installation and commissioning. Installers typically carry equipment such as a liquid refrigerant pump for this process. However, in practice, this can lead to bubbles forming in the pipes after refilling, making the pump susceptible to cavitation or blockage during operation. Utility Model Content

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems in the background technology and to provide a liquid cooling circulation device and an energy storage converter, wherein the circulation pump thereof is not prone to cavitation or collision.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical solution one and its related embodiments provide a liquid cooling circulation device, including a liquid cooling circulation pipeline, which is provided with a liquid supply port and a liquid return port for connecting to the outside, a switch valve is connected in series between the liquid supply port and the liquid return port, and the switch valve is suitable for closing before the first liquid injection and opening after the liquid injection is completed; a circulating pump, which is connected in series between the switch valve and the liquid supply port and is used to drive the cooling liquid to flow from the liquid return port to the liquid supply port; and an exhaust structure, which is connected in parallel to both ends of the switch valve and is provided with a gas-liquid separator, and the top of the gas-liquid separator is provided with an exhaust valve.

[0006] Based on Technical Solution One, Technical Solution Two is also provided. In Technical Solution Two and its related embodiments, the liquid-cooling circulation pipeline is further provided with a liquid inlet between the liquid inlet end of the circulation pump and the switch valve; the gas-liquid separator extends in a vertical direction, and a liquid inlet is provided on its side, and a liquid discharge port is provided at its bottom; the liquid discharge port is higher than the liquid inlet; the circulation pump is also suitable for driving the cooling liquid from the liquid inlet through the liquid discharge port to the liquid inlet.

[0007] Based on Technical Solution 2, Technical Solution 3 is also provided. In Technical Solution 3 and its related embodiments, the liquid cooling circulation pipeline is provided with a liquid separation port between the return liquid port and the switch valve; the liquid separation port is lower than the liquid inlet; and the circulating pump is also suitable for driving the cooling liquid to flow from the liquid separation port to the liquid inlet.

[0008] Based on Technical Solution Three, Technical Solution Two is also provided. In Technical Solution Two and its related embodiments, the exhaust structure includes an exhaust pipe connected in parallel to both ends of the switch valve, the gas-liquid separator is connected in series to the exhaust pipe, and the exhaust pipe is also connected in series with an exhaust branch valve, and the exhaust branch valve is arranged between the liquid discharge port and the liquid inlet.

[0009] Based on technical solution three or four, there is also a technical solution five. In technical solution five and its related embodiments, the exhaust structure is also provided with a fluid replenishing device; the liquid cooling circulation pipeline is also provided with a first fluid replenishing port between the switch valve and the liquid inlet end of the circulation pump; the fluid replenishing device includes a fluid replenishing part and a fluid replenishing tube; the fluid replenishing part includes a fluid replenishing tank and an expansion cap, the fluid replenishing tank is provided with a water storage chamber, a fluid filling port corresponding to the top of the water storage chamber, and a fluid replenishing port located at the bottom of the water storage chamber, the water storage chamber is configured so that the distance between the highest water level in the liquid therein and the top thereof is greater than a first value; the expansion cap is detachably covered on the fluid filling port and is provided with a pressure relief valve; the fluid replenishing port is higher than the fluid replenishing port; the fluid replenishing tube is used to connect the fluid replenishing port and the first fluid replenishing port, and is provided with an opening and closing valve thereon, and the opening and closing valve is suitable for closing when the fluid filling port is opened and opening when the fluid filling port is closed.

[0010] Based on technical solution five, technical solution six is also provided. In technical solution six and its related embodiments, the exhaust structure is provided with a first branch pipe; the liquid cooling circulation pipeline is also provided with a second liquid replenishment port, and the second liquid replenishment port is located between the switch valve and the return liquid port; the liquid replenishment tank is also provided with an overflow port corresponding to the top of the water storage chamber; the first branch pipe is used to connect the overflow port and the second liquid replenishment port; the first liquid replenishment port forms the liquid inlet; and the second liquid replenishment port forms the liquid separation port.

[0011] Based on Technical Solution 6, Technical Solution 7 is also provided. In Technical Solution 7 and its related embodiments, the liquid replenishing tank is also provided with a drainage section extending in a horizontal direction; one end of the drainage section is connected to the overflow port, and the other end is connected to the first branch pipe; a first branch valve is also connected in series to the first branch pipe, and the first branch valve is suitable for closing when the liquid filling port is opened and opening when the liquid filling port is closed.

[0012] Based on technical solution six, technical solution eight is also provided. In technical solution eight and its related embodiments, the liquid replenishing tank is provided with a top wall corresponding to the top of the water storage chamber, and the liquid filling port is lower than the top wall and is inclined relative to the vertical direction.

[0013] Based on any one of technical solutions five to eight, a technical solution nine is also provided. In technical solution nine and its related embodiments, the first end of the fluid infusion tube passes through the fluid infusion port and extends into the water storage chamber. The water storage chamber is also configured so that the lowest water level of the liquid therein is higher than the first end of the fluid infusion tube and the distance between the two is less than the second value.

[0014] Technical solution ten provides an energy storage converter, including a liquid-cooled power module and a liquid-cooled circulation device as described in any one of technical solutions one to nine, wherein the liquid-cooled power module includes a power switching tube and a liquid cooling plate for dissipating heat for the power switching tube, and the liquid cooling plate is connected to the liquid cooling circulation device.

[0015] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In technical solution one and its preferred embodiment, during the first injection, due to the large injection flow rate, there will be bubbles in the liquid and / or liquid cooling circulation pipeline. If the bubbles flow into the circulation pump, it will cause cavitation or blockage in the circulation pump, causing damage to the circulation pump. In this technical solution, a switch valve is connected in series between the liquid supply port and the liquid return port. The switch valve is suitable for closing before the first injection and opening after the injection is completed. The circulation pump is connected in series between the switch valve and the liquid supply port and is used to drive the coolant to flow from the liquid return port to the liquid supply port; the exhaust structure is connected in parallel to both ends of the switch valve and is provided with a gas-liquid separator, and the top of the gas-liquid separator is provided with an exhaust valve; therefore, before the first injection, the switch valve can be closed. During injection, the liquid does not flow directly into the liquid inlet end of the circulation pump, but first passes through the gas-liquid separator. After the liquid passes through the gas-liquid separator, the bubbles are discharged through the exhaust valve of the gas-liquid separator, and the liquid flows into the liquid inlet end of the circulation pump, which can reduce the bubbles entering the circulation pump, thereby reducing the occurrence of cavitation or blockage. After the liquid injection is completed, the switch valve can be opened, and the liquid in the liquid cooling circulation pipeline passes through the pipeline where the switch valve is located. The resistance is small and the flow rate of the coolant is faster. The gas-liquid separator is connected in parallel to the liquid cooling circulation pipeline to realize the auxiliary exhaust function.

[0017] In technical solution two and its preferred embodiment, the liquid cooling circulation pipeline is also provided with a liquid inlet between the liquid inlet end of the circulation pump and the switch valve; the gas-liquid separator extends in a vertical direction, and a liquid inlet is provided on its side and a liquid discharge port is provided on its bottom; the liquid discharge port is higher than the liquid inlet, and the circulation pump is also suitable for driving the cooling liquid from the liquid inlet through the liquid discharge port to the liquid inlet, so that gas-liquid separation can be achieved through the density of gas and liquid and the action of gravity, and the structure is simple and practical.

[0018] In technical solution three and its preferred embodiment, a liquid-cooling circulation pipeline is provided with a liquid separation port between the liquid return port and the switch valve; the liquid separation port is lower than the liquid inlet; the circulation pump is also suitable for driving the cooling port to flow from the liquid separation port to the liquid inlet. Therefore, the two ends of the gas-liquid separator are respectively connected to the liquid separation port and the liquid inlet. The liquid separation port is lower than the liquid inlet. When the liquid is first injected, the bubbles in the liquid can flow upward better, which is conducive to exhaust.

[0019] In technical solution four and its preferred embodiment, an exhaust branch valve is also connected in series to the exhaust pipe, and the exhaust branch valve is arranged between the liquid discharge port and the liquid inlet, so that the exhaust branch valve can be opened or closed as needed, which is conducive to management and control.

[0020] In technical solution five and its preferred embodiment, the exhaust structure is also provided with a fluid replenishing device. When the fluid is first injected, the fluid replenishing device can also realize auxiliary exhaust of the liquid cooling circulation pipeline; when the liquid cooling circulation pipeline is operating normally, when the pipeline pressure of the liquid cooling circulation pipeline is relatively large, the pipeline pressure of the liquid cooling circulation pipeline can flow to the fluid replenishing part, and the liquid level of the fluid replenishing part rises and squeezes the gas above the liquid, so that the pressure relief valve of the expansion cover opens, that is, the pressure relief valve on the expansion cover can realize the pressure relief of the liquid cooling circulation pipeline to prevent the pipeline pressure of the liquid cooling circulation pipeline from being too high. When the pressure of the liquid cooling circulation pipeline is relatively small, the fluid replenishing part can replenish fluid to the fluid replenishing port under the action of liquid gravity and the pressure of the pressure relief valve, so that the fluid replenishing part integrates the functions of the fluid replenishing water tank and the expansion tank, ensuring that the pipeline of the liquid cooling circulation pipeline operates at a relatively stable pressure, making the structure of the liquid cooling circulation device compact and simple. After the liquid-cooling circulation pipeline has been running for a period of time, the liquid-replenishing component replenishes liquid to the liquid-cooling circulation pipeline. When the liquid in the liquid-replenishing component is less, it is necessary to replenish liquid to the liquid-replenishing component. In this technical solution, the water storage chamber is configured so that the distance between the highest water level of the liquid therein and its top is greater than a first value, so that there is enough space between the highest water level of the liquid in the water storage chamber and its top; the liquid-replenishing pipe is used to connect the liquid-replenishing port and the liquid-replenishing port, and an opening and closing valve is provided thereon. The opening and closing valve is suitable for closing when the liquid-filling port is opened. Therefore, before adding liquid to the liquid-replenishing component, the opening and closing valve can be closed first. At this time, the liquid-filling port is opened, and the pressure released outward by the liquid-replenishing component is generally the liquid pressure between the liquid-replenishing port and the current liquid level of the liquid in the water storage chamber. The pressure is the pressure of the liquid between the refill port and the lowest water level of the liquid in the water storage chamber, and at most the pressure of the liquid between the refill port and the highest water level of the liquid in the water storage chamber. The pressure is relatively low, and because the water storage chamber is configured to have sufficient space between the highest water level of the liquid therein and its top, when the refill port is opened after the on-off valve is closed, the pressure of the liquid in the refill component is low, and it can be released completely within the space between the current water level of the liquid in the water storage chamber and the top of the water storage chamber, making it difficult to spray out through the refill port, and the release time is short. After opening the expansion cap and waiting for a short time, the water pressure in the refill component and the external atmospheric pressure are balanced, and liquid can be added to the refill component, thereby simplifying the refill operation. After the refill is completed, the on-off valve can be opened, and the refill device and the pipeline that can ensure the liquid cooling circulation pipeline operate at a relatively stable pressure.

[0021] In technical solution six and its preferred embodiment, the first branch pipe is used to connect the overflow port and the second refill port. When too much liquid is added to the refill unit (generally exceeding the maximum water level mark), the liquid in the refill unit can flow through the overflow port and the first branch pipe to the second refill port, thereby lowering the maximum water level of the refill unit and avoiding liquid spraying caused by excessively high water levels during subsequent refilling. The refill unit is also connected in parallel to both ends of the switch valve, which facilitates the auxiliary exhaust function of the refill unit during the initial liquid filling. The first refill port forms the liquid inlet, and the second refill port forms the liquid outlet. The liquid cooling pipe is easier to process and form, and after the liquid cooling circulation device is operating normally, it is easier to form a closed system.

[0022] In technical solution seven and its preferred embodiment, the fluid infusion tank is provided with a drainage section extending in a horizontal direction, one end of the drainage section is connected to the overflow port, and the other end is connected to the first branch pipe, which is conducive to the liquid discharged from the fluid infusion component through the overflow port to slowly flow to the second fluid infusion port; a first branch valve is also connected in series on the first branch pipe, and the first branch valve is suitable for closing when the liquid filling port is opened and opening when the liquid filling port is closed, so that the first branch valve can be opened or closed as needed, which is conducive to management and control.

[0023] In technical solution eight and its preferred embodiment, the liquid adding port is lower than the top wall and is inclined relative to the vertical direction. Compared with the liquid adding port being arranged on the top wall, the water in the water storage chamber is less likely to spray out through the liquid adding port, and the inclined liquid adding port is also easier to perform liquid adding operations when the liquid adding port is at a relatively high height.

[0024] In technical solution nine and its preferred embodiment, the first end of the fluid infusion tube passes through the fluid infusion port and extends into the water storage chamber. The water storage chamber is also configured so that the lowest water level therein is higher than the first end of the fluid infusion tube and the distance between the two is less than the second value. Compared with the solution in which the first end of the fluid infusion tube is located at the bottom of the water storage chamber, the water pressure in the water storage chamber can be guaranteed, thereby making it easy for the fluid infusion component to replenish fluid to the fluid infusion port.

[0025] Technical solution 10 has the technical advantages of any one of technical solutions 1 to 9. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a working principle diagram of the liquid cooling circulation device connected to the liquid cooling plate in an embodiment of the present application;

[0028] Figure 2 Schematic diagram of the liquid cooling circulation device in this embodiment;

[0029] Figure 3 for Figure 2 Side view of;

[0030] Figure 4 for Figure 3 A top view of

[0031] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0032] Figure 6 This is a partial schematic diagram of the fluid infusion tank according to an embodiment of the present application;

[0033] Description of main reference numerals:

[0034] Shell 10; liquid cooling circulation pipeline 20; liquid supply port 21; liquid return port 22; switch valve 23; first liquid replenishing port 24; second liquid replenishing port 25; circulation pump 30; exhaust pipeline 40; gas-liquid separator 41; liquid inlet 411; liquid discharge port 412; exhaust valve 413; exhaust branch valve 42; liquid replenishing device 50; liquid replenishing component 51; liquid replenishing tank 52; water storage chamber 01; maximum water level mark 02; minimum water level mark 03; liquid adding port 521; liquid replenishing port 522; overflow port 523; top wall 524; expansion cover 53; pressure relief valve 531; liquid replenishing pipe 54; opening and closing valve 541; grid structure 55; liquid outlet 551; liquid discharge section 56; first branch pipe 60; first branch valve 61; heat exchange device 70; liquid cooling plate 100. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0037] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present utility model.

[0038] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0039] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0040] This embodiment provides an energy storage converter, which includes a liquid-cooled power module and a liquid-cooled circulation device. The liquid-cooled power module includes a power switch tube and a liquid cooling plate 100 for dissipating heat for the power switch tube. The liquid cooling plate 100 is connected to the liquid cooling circulation device.

[0041] See also Figure 1-4 , Figure 1 The figure shows the working principle of a liquid cooling circulation device connected to the liquid cooling plate 100. Figure 2-4 This is a schematic diagram of the liquid cooling circulation device, see Figure 2-4 The liquid cooling circulation device includes a shell 10 and a liquid cooling circulation pipe 20, a circulation pump 30, an exhaust pipe and a heat exchange device 70 accommodated in the shell 10.

[0042] The liquid cooling circulation pipe 20 is provided with a liquid supply port 21 and a liquid return port 22 for connecting to an external liquid cooling plate 100. The liquid cooling plate 100 is generally a liquid cooling plate. A switch valve 23 is connected in series between the liquid supply port 21 and the liquid return port 22. The switch valve 23 is adapted to be closed before the initial liquid injection and opened after the liquid injection is completed. The liquid cooling circulation pipe 20 is also provided with a liquid inlet and a first liquid replenishment port 24 between the liquid inlet end of the circulation pump 30 and the switch valve 23, and a liquid separation port and a second liquid replenishment port 25 between the liquid return port 22 and the switch valve 23. In this embodiment, the liquid inlet and the first liquid replenishment port 24 are integrated, and the liquid separation port and the second liquid replenishment port 25 are integrated, so that the first liquid replenishment port 24 forms the liquid inlet and the second liquid replenishment port 25 forms the liquid separation port. The first liquid replenishment port 24 and the second liquid replenishment port 25 are respectively located at opposite ends of the switch valve 23.

[0043] The circulation pump 30 is connected in series between the switch valve 23 and the liquid supply port 21 and is used to drive the coolant from the return liquid port 22 to the liquid supply port 21. When the switch valve 23 is opened, the circulation pump 30 drives the coolant from the return liquid port 22 to the second liquid replenishing port 25 and the first liquid replenishing port 24 to the liquid supply port 21.

[0044] The exhaust structure is connected in parallel to both ends of the switch valve 23 and includes an exhaust pipe 40 , a liquid replenishing device 50 , and a first branch pipe 60 .

[0045] The exhaust pipe 40 is connected in parallel to both ends of the switch valve 23, and a gas-liquid separator 41 and an exhaust branch valve 42 are connected in series thereto. Figure 2-3 In the embodiment, the gas-liquid separator 41 extends vertically, with a liquid inlet 411 on its side, a liquid outlet 412 at its bottom, and an exhaust valve 413 at its top. The liquid inlet 411 is higher than the second liquid replenishing port 25 (liquid separation port), and the liquid outlet 412 is higher than the first liquid replenishing port 24 (liquid inlet). When the on-off valve 23 is closed, the circulating pump 30 drives the coolant through the second liquid replenishing port 25 (liquid separation port), the liquid inlet 411, and the liquid outlet 412 into the first liquid replenishing port 24 (liquid inlet). The exhaust branch valve 42 is located between the liquid outlet 412 and the first liquid replenishing port 24 (liquid inlet).

[0046] See also Figure 3-6The liquid replenishing device 50 includes a liquid replenishing part 51 and a liquid replenishing tube 54; the liquid replenishing part 51 includes a liquid replenishing tank 52 and an expansion cap 53. The liquid replenishing tank 52 is provided with a water storage chamber 01, a maximum water level mark 02 corresponding to the water storage chamber 01, a minimum water level mark 03 corresponding to the water storage chamber 01, a liquid filling port 521 higher than the maximum water level mark 02, a liquid replenishing port 522 located at the bottom end of the water storage chamber 01, an overflow port 523 higher than the maximum water level, and a top wall 524 forming the top of the water storage chamber 01. The distance between the maximum water level mark 02 and the top wall 524 is Greater than the first value, that is, the water storage chamber 01 is configured such that the distance between the highest water level in the liquid therein and its top is greater than the first value, and the liquid filling port 521 corresponds to the top of the water storage chamber 01; the expansion cover 53 is detachably covered on the liquid filling port 521 and is provided with a pressure relief valve 531; the liquid infusion port 522 is higher than the first liquid infusion port 24; the liquid infusion pipe 54 is used to connect the liquid infusion port 522 and the first liquid infusion port 24, and is provided with an opening and closing valve 541, which is adapted to close when the liquid infusion port 521 is opened and open when the liquid infusion port 521 is closed. In this embodiment, see Figure 5 The first end (upper end) of the liquid infusion tube 54 passes through the liquid infusion port 522 and extends into the water storage chamber 01, and the distance between the first end (upper end) and the lowest water level mark 03 is less than the second value. That is, the water storage chamber 01 is configured so that the lowest water level of the liquid therein is higher than the first end of the liquid infusion tube 54 and the distance between the two is less than the second value.

[0047] In this embodiment, see Figure 6 A grid structure 55 is formed in the water storage chamber 01. The grid structure 55 is located between the liquid adding port 521 and the liquid replenishing port 522 in the vertical direction. The grid structure 55 is provided with at least two liquid passage ports 551 arranged in the vertical direction and staggered in the horizontal direction. The liquid adding port 521 is connected to the liquid replenishing port 522 through each liquid passage port 551.

[0048] In this embodiment, see Figure 3 The liquid filling port 521 is lower than the top wall 524 and is tilted relative to the vertical direction. In this embodiment, the liquid infusion tank 52 is further provided with a drainage section 56 extending horizontally. One end of the drainage section 56 is connected to the overflow port 523, and the other end is connected to the first branch pipe 60; the first branch pipe 60 is used to connect the overflow port 523 and the second liquid infusion port 25. The first branch pipe 60 is also connected in series with a first branch valve 61. The first branch valve 61 is adapted to close when the liquid filling port 521 is opened and to open when the liquid filling port 521 is closed. Therefore, when the first branch valve 61 and the on-off valve 541 are both open, the liquid infusion component 51 is connected in parallel to both ends of the switch valve 23.

[0049] In actual applications, the switch valve 23 , the on-off valve 541 , the first branch valve 61 and the exhaust branch valve 42 are all two-way valves.

[0050] The working process of this embodiment is as follows:

[0051] During the first injection, the switch valve 23 is closed, and the opening and closing valve 541, the first branch valve 61 and the exhaust branch valve 42 are opened. After the coolant is injected into the liquid cooling circulation pipe 20, the liquid does not flow directly into the liquid inlet end of the circulation pump 30 during injection, but passes through the liquid replenishing device 50 and the exhaust pipe 40 connected in parallel with the switch valve 23. Among them, most of the liquid passes through the gas-liquid separator 41 of the exhaust pipe 40, and a small amount of liquid flows to the liquid replenishing device 50. The liquid enters the gas-liquid separator 41 through the second liquid replenishing port 25 and the liquid inlet 411. In the gas-liquid separator 41, the gas is discharged upward through the exhaust valve 413, and then the liquid flows to the first liquid replenishing port 24 through the drain port 412. Therefore, the bubbles are discharged through the gas-liquid separator 41, and the liquid flows into the liquid inlet end of the circulation pump 30, completing a cycle; a small amount of liquid and bubbles flow into the liquid replenishing pipe 54, and the bubbles are discharged through the liquid replenishing part 51. That is, both the exhaust pipe 40 and the liquid replenishing device 50 can exhaust the liquid cooling circulation pipe 20, but most of the bubbles are discharged from the exhaust pipe 40, and a small part is discharged from the liquid cooling circulation pipe 20;

[0052] After the first injection is completed, during normal use of the system, the switch valve 23 can be opened, the opening and closing valve 541, the first branch valve 61 and the exhaust branch valve 42 can be opened, and the circulating pump 30 drives the coolant from the return liquid port 22 through the second liquid replenishing port 25 and the first liquid replenishing port 24 to flow to the liquid supply port 21; when the pipeline pressure of the liquid cooling circulation pipeline 20 is relatively large, the pipeline pressure of the liquid cooling circulation pipeline 20 can flow to the liquid replenishing part 51 and / or the gas-liquid separator 41. When flowing into the liquid replenishing part 51, the liquid level of the liquid replenishing part 51 rises and squeezes the gas above the liquid. The expansion cover 53 is opened, so that the pressure relief valve 531 of the expansion cover 53 is opened. That is, the pressure relief valve 531 on the expansion cover 53 can realize the pressure relief of the liquid cooling circulation pipeline 20, and prevent the pipeline pressure of the liquid cooling circulation pipeline 20 from being too high. When the liquid flows into the gas-liquid separator 41, it will cause the liquid to flow into the gas-liquid separator 41; when the pressure of the liquid cooling circulation pipeline 20 is relatively low, the liquid replenishing component 51 can replenish liquid to the first liquid replenishing port 24 under the action of liquid gravity and the pressure of the pressure relief valve 531; at this time, the liquid replenishing component 51 plays the role of an expansion tank and a water tank in one;

[0053] When manual fluid replenishment is required for the fluid replenishing component 51, the opening and closing valve 541 and the first branch valve 61 are closed, the switch valve 23 and the exhaust branch valve 42 can be opened normally, the liquid filling port 521 is opened, and liquid is added to the water storage chamber 01 of the fluid replenishing component 51 after a short waiting time. After the fluid replenishment is completed, the opening and closing valve 541 and the first branch valve 61 are opened.

[0054] In this embodiment, during the first injection, due to the large injection flow rate, there will be bubbles on the liquid and / or liquid cooling circulation pipe 20. If the bubbles flow into the circulation pump 30, it will cause cavitation or blockage of the circulation pump 30, resulting in damage to the circulation pump 30. In this embodiment, a switch valve 23 is connected in series between the liquid supply port 21 and the liquid return port 22. The switch valve 23 is suitable for closing before the first injection and opening after the injection is completed. The circulation pump 30 is connected in series between the switch valve 23 and the liquid supply port 21 and is used to drive the coolant to flow from the liquid return port 22 to the liquid supply port 21; The gas structure is connected in parallel to both ends of the switch valve 23 and is provided with a gas-liquid separator 41. The top of the gas-liquid separator 41 is provided with an exhaust valve 413. Therefore, before the first injection, the switch valve 23 can be closed. During injection, the liquid does not flow directly into the liquid inlet of the circulation pump 30, but first passes through the gas-liquid separator 41 of the exhaust pipe 40. After the liquid passes through the gas-liquid separator 41, the bubbles are discharged through the exhaust valve of the gas-liquid separator 41, and the liquid then flows into the liquid inlet of the circulation pump 30. This can reduce the bubbles entering the circulation pump 30, thereby reducing the occurrence of cavitation or collision. After the injection is completed, the switch valve 23 can be opened, and the liquid in the liquid cooling circulation pipe passes through the pipe where the switch valve 23 is located. The resistance is small and the flow rate of the coolant is faster. The gas-liquid separator 41 is connected in parallel to the liquid cooling circulation pipe 20 to realize the auxiliary exhaust function.

[0055] In this embodiment, the liquid cooling circulation pipeline 20 is further provided with a liquid inlet between the liquid inlet end of the circulation pump 30 and the switch valve 23; the gas-liquid separator 41 extends in the vertical direction, and a liquid inlet 411 is provided on its side, and a liquid discharge port 412 is provided on its bottom; the liquid discharge port 412 is higher than the liquid inlet, and the circulation pump 30 is also suitable for driving the coolant from the liquid inlet 411 through the liquid discharge port 412 to the liquid inlet, so that gas-liquid separation can be achieved through the density of gas and liquid and the action of gravity, and the structure is simple and practical.

[0056] In this embodiment, the liquid cooling circulation pipe 20 is provided with a liquid separation port between the return liquid port 22 and the switch valve 23; the liquid separation port is lower than the liquid inlet 411; the circulation pump 30 is also suitable for driving the cooling port to flow from the liquid separation port to the liquid inlet 411. Therefore, the two ends of the exhaust pipe 40 are respectively connected to the liquid separation port and the liquid inlet. The liquid separation port is lower than the liquid inlet 411. When the liquid is first injected, the bubbles in the liquid can flow upward better, which is conducive to exhaust.

[0057] In this embodiment, an exhaust branch valve 42 is also connected in series to the exhaust pipe 40. The exhaust branch valve 42 is arranged between the liquid discharge port 412 and the liquid inlet, so that the exhaust branch valve 42 can be opened or closed as needed, which is beneficial for management and control.

[0058] In this embodiment, the exhaust structure is further provided with a fluid replenishing device 50. When the fluid is first injected, the fluid replenishing device 50 can also realize auxiliary exhaust of the liquid cooling circulation pipeline; when the liquid cooling circulation pipeline is operating normally, when the pipeline pressure of the liquid cooling circulation pipeline 20 is relatively large, the pipeline pressure of the liquid cooling circulation pipeline 20 can flow to the fluid replenishing component 51, and the liquid level of the fluid replenishing component 51 rises and squeezes the gas above the liquid, so that the pressure relief valve 531 of the expansion cover 53 opens, that is, the pressure relief valve 531 on the expansion cover 53 can realize the pressure relief of the liquid cooling circulation pipeline 20, and prevent the pipeline pressure of the liquid cooling circulation pipeline 20 from being too high. When the pipeline pressure of the liquid cooling circulation pipeline 20 is relatively small, the fluid replenishing component 51 can replenish fluid to the fluid replenishing port under the action of liquid gravity and the pressure of the pressure relief valve 531, so that the fluid replenishing component 51 integrates the functions of the fluid replenishing water tank and the expansion tank, ensuring that the pipeline of the liquid cooling circulation pipeline 20 operates at a relatively stable pressure, making the structure of the liquid cooling circulation device compact and simple. After the liquid-cooling circulation pipeline has been running for a period of time, the liquid-replenishing component 51 replenishes liquid to the liquid-cooling circulation pipeline. When the liquid in the liquid-replenishing component 51 is less, it is necessary to replenish liquid to the liquid-replenishing component 51. In this embodiment, the water storage chamber 01 is configured so that the distance between the highest water level in the liquid therein and its top is greater than a first value, so that there is enough space between the highest water level of the water storage chamber 01 and the top wall 524; the liquid-replenishing pipe 54 is used to connect the liquid-replenishing port 522 and the liquid-replenishing port, and is provided with an opening and closing valve 541 thereon. The opening and closing valve 541 is suitable for closing when the liquid filling port 521 is opened. Therefore, before adding liquid to the liquid-replenishing component 51, the opening and closing valve 541 can be closed first. At this time, the liquid filling port 521 is opened, and the pressure released outward by the liquid-replenishing component 51 is mainly the pressure of the liquid between the first liquid-replenishing port 24 and the current water level in the water storage chamber 01. The pressure is generally the pressure of the liquid between the first liquid replenishment port 24 and the lowest water level of the liquid in the water storage chamber 01, and at most the pressure of the liquid between the first liquid replenishment port 24 and the highest water level of the liquid in the water storage chamber 01. The pressure is relatively low, and since there is sufficient space between the highest water level of the water storage chamber 01 and the top wall 524, after the on-off valve 541 is closed, the liquid filling port 521 is opened, and the pressure of the liquid in the liquid replenishment member 51 is low. The liquid can be released completely in the space between the highest water level of the water storage chamber 01 and the top wall 524, and is not easily ejected through the liquid filling port 521. The release time is short, and after opening the expansion cap 53 and waiting for a short time, the water pressure in the liquid replenishment member 51 is balanced with the external atmospheric pressure, and liquid can be added to the liquid replenishment member 51, thereby simplifying the liquid addition operation. After the liquid replenishment is completed, the on-off valve 541 can be opened, and the liquid replenishment device 50 and the pipeline that can ensure the liquid cooling circulation pipeline operate at a relatively stable pressure.

[0059] In this embodiment, the first branch pipe 60 is used to connect the overflow port 523 and the second liquid replenishing port 25. When too much liquid is added to the liquid replenishing component 51 (generally exceeding the maximum water level mark 02), the liquid in the liquid replenishing component 51 can flow to the second liquid replenishing port 25 through the overflow port 523 and the first branch pipe 60, thereby lowering the maximum water level of the liquid replenishing component 51, avoiding liquid spraying due to excessively high water level during subsequent liquid addition, and making the liquid replenishing component 51 connected in parallel to the two ends of the switch valve 23, which is conducive to realizing the auxiliary exhaust function of the liquid replenishing component 51 during the first liquid injection.

[0060] In this embodiment, the first liquid replenishing port 24 forms a liquid inlet, and the second liquid replenishing port 25 forms a liquid separation port. The liquid cooling pipe is easier to process and form, and after the liquid cooling circulation device operates normally, it is easier to form a closed system.

[0061] In this embodiment, the fluid infusion tank 52 is provided with a drainage section 56 extending in a horizontal direction. One end of the drainage section 56 is connected to the overflow port 523, and the other end is connected to the first branch pipe 60, which is conducive to the liquid discharged from the fluid infusion component 51 through the overflow port 523 to slowly flow to the second fluid infusion port 25; the first branch pipe 60 is also connected in series with a first branch valve 61, which is suitable for closing when the liquid filling port 521 is opened and opening when the liquid filling port 521 is closed, so that the first branch valve 61 can be opened or closed as needed, which is conducive to management and control.

[0062] In this embodiment, a grid structure 55 is formed in the water storage chamber 01. The grid structure 55 is located between the liquid adding port 521 and the liquid replenishing port 522 in the vertical direction. The grid structure 55 is provided with at least two liquid passage ports 551 arranged in the vertical direction and staggered in the horizontal direction. The liquid adding port 521 is connected to the liquid replenishing port 522 through each liquid passage port 551. On the one hand, the grid structure 55 can increase the strength of the liquid replenishing component 51. On the other hand, the grid structure 55 forms a labyrinth-like waterway between the liquid adding port 521 and the liquid replenishing port 522. When the liquid adding port 521 is opened, the water flow resistance is large, and the water in the water storage chamber 01 is not easily sprayed out.

[0063] In this embodiment, the liquid filling port 521 is lower than the top wall 524 and is inclined relative to the vertical direction. Compared with the liquid filling port 521 being arranged on the top wall 524, the water in the water storage chamber 01 is less likely to be sprayed out through the liquid filling port 521. Moreover, the inclined liquid filling port 521 is easier to perform liquid filling operations when the liquid filling port 521 is at a relatively high height.

[0064] In this preferred embodiment, the fluid infusion tank 52 is also provided with a minimum water level mark 03 corresponding to the water storage chamber 01. The first end of the fluid infusion tube 54 passes through the fluid infusion port 522 and extends into the water storage chamber 01, and the distance between the first end of the fluid infusion tube 54 and the minimum water level mark is less than the second value. Compared with the solution in which the first end of the fluid infusion tube 54 is located at the bottom of the water storage chamber 01, the water pressure in the water storage chamber 01 can be guaranteed, so that the fluid infusion component 51 can easily replenish fluid to the fluid infusion port.

[0065] The above description and embodiments are used to explain the scope of protection of the utility model, but do not constitute a limitation on the scope of protection of the utility model. Based on the enlightenment of the utility model or the above embodiments, modifications, equivalent replacements, or other improvements to the embodiments of the utility model or part of the technical features thereof that can be obtained by ordinary technicians in this field through logical analysis, reasoning, or limited experiments in combination with common knowledge, ordinary technical knowledge in this field and / or existing technology should be included in the scope of protection of the utility model.

Claims

1. A liquid cooling circulation device, characterized in that: include A liquid cooling circulation pipe (20) is provided with a liquid supply port (21) and a liquid return port (22) for connecting to the outside, a switch valve (23) is connected in series between the liquid supply port (21) and the liquid return port (22), and the switch valve (23) is suitable for closing before the first liquid injection and opening after the liquid injection is completed; a circulation pump (30) connected in series between the switch valve (23) and the liquid supply port (21) and used to drive the coolant to flow from the liquid return port (22) to the liquid supply port (21); and The exhaust structure is connected in parallel to both ends of the switch valve (23) and is provided with a gas-liquid separator (41). The top end of the gas-liquid separator (41) is provided with an exhaust valve (413).

2. A liquid cooling circulation device according to claim 1, characterized in that: The liquid cooling circulation pipeline (20) is further provided with a liquid inlet between the liquid inlet end of the circulation pump (30) and the switch valve (23); the gas-liquid separator (41) extends in a vertical direction, and is provided with a liquid inlet (411) on its side and a liquid discharge port (412) at its bottom; the liquid discharge port (412) is higher than the liquid inlet; and the circulation pump (30) is further adapted to drive the cooling liquid to flow from the liquid inlet (411) through the liquid discharge port (412) to the liquid inlet.

3. A liquid cooling circulation device as claimed in claim 2, characterized in that: The liquid cooling circulation pipeline (20) is provided with a liquid separation port between the liquid return port (22) and the switch valve (23); the liquid separation port is lower than the liquid inlet (411); and the circulation pump (30) is also suitable for driving the cooling liquid to flow from the liquid separation port to the liquid inlet (411).

4. A liquid cooling circulation device as claimed in claim 3, characterized in that: The exhaust structure comprises an exhaust pipe (40) connected in parallel to both ends of the switch valve (23); the gas-liquid separator (41) is connected in series to the exhaust pipe (40); and the exhaust pipe (40) is further connected in series to an exhaust branch valve (42); the exhaust branch valve (42) is arranged between the liquid discharge port (412) and the liquid inlet.

5. A liquid cooling circulation device as claimed in claim 4, characterized in that: The exhaust structure is further provided with a liquid replenishing device (50); the liquid cooling circulation pipeline (20) is further provided with a first liquid replenishing port (24) between the switch valve (23) and the liquid inlet end of the circulation pump (30); The rehydration device (50) comprises a rehydration component (51) and a rehydration tube (54); the rehydration component (51) comprises a rehydration tank (52) and an expansion cover (53); the rehydration tank (52) is provided with a water storage chamber (01), a liquid filling port (521) corresponding to the top of the water storage chamber (01), and a rehydration port (522) located at the bottom of the water storage chamber (01); the water storage chamber (01) is configured such that the distance between the highest water level of the liquid in the water storage chamber and the top of the water storage chamber is greater than a first value The expansion cover (53) is detachably mounted on the liquid filling port (521) and is provided with a pressure relief valve (531); the liquid infusion port (522) is higher than the first liquid infusion port (24); the liquid infusion tube (54) is used to connect the liquid infusion port (522) and the first liquid infusion port (24), and is provided with an opening and closing valve (541), and the opening and closing valve (541) is suitable for closing when the liquid filling port (521) is opened and opening when the liquid filling port (521) is closed.

6. A liquid cooling circulation device according to claim 5, characterized in that: The exhaust structure is provided with a first branch pipe (60); the liquid cooling circulation pipeline (20) is also provided with a second liquid replenishing port (25), and the second liquid replenishing port (25) is located between the switch valve (23) and the liquid return port (22); the liquid replenishing tank (52) is also provided with an overflow port (523) corresponding to the top of the water storage chamber (01); the first branch pipe (60) is used to connect the overflow port (523) and the second liquid replenishing port (25); the first liquid replenishing port (24) forms the liquid inlet; the second liquid replenishing port (25) forms the liquid separation port.

7. A liquid cooling circulation device according to claim 6, characterized in that: The liquid replenishing tank (52) is further provided with a liquid discharge section (56) extending in a horizontal direction; one end of the liquid discharge section (56) is connected to the overflow port (523), and the other end is connected to the first branch pipe (60); a first branch valve (61) is further connected in series to the first branch pipe (60); the first branch valve (61) is adapted to be closed when the liquid filling port (521) is opened and to be opened when the liquid filling port (521) is closed.

8. A liquid cooling circulation device according to claim 6, characterized in that: The liquid replenishing tank (52) is provided with a top wall (524) corresponding to the top end of the water storage chamber (01), and the liquid filling port (521) is lower than the top wall (524) and is arranged obliquely relative to the vertical direction.

9. A liquid cooling circulation device according to any one of claims 5 to 8, characterized in that: The first end of the rehydration tube (54) passes through the rehydration port (522) and extends into the water storage chamber (01). The water storage chamber (01) is also configured such that the lowest water level of the liquid therein is higher than the first end of the rehydration tube (54) and the level between the two is less than a second value.

10. An energy storage converter, characterized in that: The invention comprises a liquid-cooled power module and a liquid-cooled circulation device as described in any one of claims 1 to 9, wherein the liquid-cooled power module comprises a power switch tube and a liquid-cooled plate (100) for dissipating heat for the power switch tube, and the liquid-cooled plate (100) is connected to the liquid-cooled circulation device.

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