Liquid cooling radiator and liquid path device and injection and drainage method thereof

Abstract

A liquid path device comprises a base, the base is provided with a first flow guide device, a second flow guide device and a first injection and discharge port which are communicated with one another, the first flow guide device comprises a flow resistance asymmetric structure, and the second flow guide device comprises a flow resistance asymmetric structure or a large flow resistance structure. When the first flow guide device and the second flow guide device are both of a flow resistance asymmetric structure, the forward directions of the first flow guide device and the second flow guide device are the same, the liquid path device is connected into a liquid path in series through the first flow guide device and the second flow guide device, and the first injection and drainage opening controls connection and disconnection of the inside and the outside of the liquid path. The liquid cooling radiator comprises the liquid path device, one of the first flow guide device and the second flow guide device is located below the liquid level in the base, the forward direction of the first flow guide device and the second flow guide device faces the outer portion of the base, and the injection and drainage opening is located above the liquid level in the base. According to the injection and drainage method for the liquid-cooled radiator, the liquid-cooled radiator is sealed, the interior of the base is sucked through the first injection and drainage opening, and the strong negative pressure in the base is recovered to the weak negative pressure or the external atmospheric pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling radiators, and in particular to a liquid cooling radiator and a liquid circuit device and an injection and discharge method thereof. Background Art

[0002] With the advancement of technology, core processors like CPUs and GPUs are becoming increasingly overheated. Traditional air cooling, limited by its size and weight, is unable to effectively dissipate heat. Liquid cooling has emerged as a solution, but split liquid cooling is difficult to effectively promote due to its complexity. Ultimately, all-in-one liquid cooling radiators have rapidly developed. However, the internal volume of an all-in-one liquid cooling radiator is limited, and evaporation of the coolant can easily lead to air inflow into the liquid pump, which in turn prevents the pump from circulating the coolant. Existing all-in-one liquid cooling radiators are difficult to expel bubbles from the pump by filling and draining the liquid, turning the entire chassis upside down, or removing the liquid cooling radiator and then reinstalling it. Furthermore, after long-term use, sediment will accumulate in the internal liquid path of the liquid cooling radiator, blocking the normal circulation of the coolant and significantly reducing its heat transfer efficiency. Furthermore, blockage of the liquid path leads to abnormal increases in internal pressure and temperature, which together greatly increase the likelihood of leakage. Summary of the Invention

[0003] In response to the above shortcomings, a liquid-cooled radiator and its liquid path device and injection and discharge method are proposed. While strictly controlling the volume, they can facilitate the exhaust of the liquid pump, the cleaning of deposits in front of the microchannel, the replacement of cold liquid, and the prevention of liquid leakage under negative pressure.

[0004] To achieve the above objectives, the present invention provides a fluid path device, comprising a base, wherein the base is provided with three interconnected channels, each of the channels being respectively connected to a first flow guiding device, a second flow guiding device, and one of a first injection and discharge port, the first flow guiding device comprising an asymmetric flow resistance structure, the asymmetric flow resistance structure comprising a one-way valve, a Tesla valve, a Venturi tube, a conical valve core valve seat, or a duckbill valve, the second flow guiding device comprising an asymmetric flow resistance structure or a large flow resistance structure, the large flow resistance structure comprising filter cotton, a filter screen, a flow meter, a turbulator, a microchannel, a slit, a micropore, a liquid cooling head, or a liquid cooling row, the forward flow resistance of the asymmetric flow resistance structure being smaller than the flow resistance of the large flow resistance structure, and the reverse flow resistance of the asymmetric flow resistance structure being smaller than the flow resistance of the asymmetric flow resistance structure, when the first flow guiding device and the second flow guiding device are both asymmetric flow resistance structures, their forward directions are the same, the fluid path device is connected in series into the fluid path through the first flow guiding device and the second flow guiding device, and the first injection and discharge port connects the inside and outside of the fluid path. The cycle of extracting and injecting the fluid into the base through the injection and discharge port can make the fluid flow through the base in one direction through the first guide device and the second guide device, thereby promoting the movement of the cold liquid.

[0005] A liquid-cooled radiator is proposed, comprising the above-mentioned liquid circuit device, wherein the liquid circuit device is connected in series in the circulating liquid circuit of the liquid-cooled radiator, one of the first flow guide device and the second flow guide device is located below the liquid level in the base and its positive direction is toward the outside of the base, and the injection and discharge port is located above the liquid level in the base.

[0006] Due to the evaporation of liquid, there is a certain amount of gas inside the liquid-cooled radiator. In addition, considering the lifespan and noise, the liquid-cooled radiator usually chooses a centrifugal pump as the circulation pump. When the gas moves into the circulation pump with the cold liquid, it will cause the centrifugal pump to take in air, thereby affecting the circulation. In severe cases, the circulation cannot be completed at all, and the centrifugal pump will also be burned. Therefore, the present invention proposes a liquid path device. After the liquid path device is set in the liquid-cooled radiator, the liquid flow can be promoted even when the circulation pump fails by repeatedly injecting and discharging the liquid at the injection and discharge ports, thereby causing the air to leave the circulation pump from the circulation pump outlet. This is very important in computer liquid-cooled radiators. If there is no such liquid path device, the existing liquid-cooled radiator wants to discharge the air in the circulation pump, and often can only exhaust the air by turning the radiator upside down and left and right by the influence of gravity on the gas. Since the amount of air is actually very small, the effect of gravity on it is limited. In addition, the air may exist in multiple places, and the difference in gravity may offset each other. Therefore, the actual situation is that even after multiple rounds of inversion, it is still difficult to exhaust the air and restore the circulation pump's circulation capacity. On the other hand, it is also very troublesome to remove the liquid cooling radiator after it is installed on the chassis, so the entire host must be inverted back and forth, which is very time-consuming, labor-intensive and inefficient. However, the liquid circuit device described in this solution only needs a syringe or other similar device to be connected to the injection and discharge port. After the injection and discharge port is sucked back and forth, the air can be exhausted efficiently and easily, which has huge advantages. Since the cold head in the liquid cooling radiator has a microchannel structure, it can act as a second guide device. Therefore, the liquid circuit device described in this solution, when intersecting with the existing liquid cooling radiator, only needs to add a first guide device such as a one-way valve and an injection and discharge port. The improvement cost is very low, but the effect obtained is very significant. The design of the injection and discharge port being located above the liquid surface and the liquid outlet being located below the liquid surface allows the gas in the liquid cooling radiator to be retained in the base to avoid affecting the circulation pump.

[0007] Preferably, the forward direction of the first flow guide is the same as the direction of coolant circulation in the liquid-cooled radiator. Furthermore, the low flow resistance direction of the first flow guide is the same as the direction of coolant circulation in the liquid-cooled radiator. This significantly reduces the impact of the first flow guide on the circulation flow.

[0008] Preferably, a flexible bladder is included, comprising an air bag, air bubble, or piston. The flexible bladder is positioned within the liquid circulation path of the liquid-cooled radiator and outside the liquid path device. As the pressure in the circulation loop increases, the flexible bladder reduces the volume of the circulating liquid path, and as the pressure decreases, the volume of the circulating liquid path increases. The provision of the flexible bladder allows for greater injection or extraction volume in each injection and drainage cycle during injection and drainage operations, resulting in greater efficiency.

[0009] Preferably, the base is located where sediment accumulates, such as at the liquid inlet of the liquid cooling head microchannel or the filter inlet. Placing the injection and discharge port at the sediment accumulation location allows for a chance of flushing sediment out of the base and out through the injection and discharge port during a suction cycle, thereby clearing the channel.

[0010] Preferably, the one-way valve is comprised of a convex screw cap, comprising a convex cover at the front and a hollow tube at the rear. The convex cover is only partially connected to the hollow tube. The outer diameter of the hollow tube is larger than the inner diameter of the coolant line, allowing it to be fixed within the line. The outer diameter of the convex cover is smaller than the inner diameter of the coolant line, allowing it to rotate within the line around its connection with the hollow tube when impacted by the coolant. By radially cutting a long slit in the convex screw cap without completely bisecting it, a one-way valve with a diameter approximately equal to the inner diameter of the original coolant line and an opening pressure of approximately 0 kPa is formed at low cost without adding additional volume.

[0011] Preferably, the base is provided with a second injection and discharge port, or the first injection and discharge port is connected to the first end of a tee. By providing a second injection and discharge port or a tee, the extraction channel and the injection channel are separated, so that clean new liquid and turbid old liquid are separated, and the channel is cleaned and the cold liquid is replaced more efficiently.

[0012] Preferably, a sensor and a vacuum pump are included, the sensor is connected to the liquid pump outlet, the vacuum pump inlet is connected to the first injection and discharge port, the sensor detects the pressure at the liquid pump outlet, and the vacuum pump is started and stopped to maintain the pressure at the liquid pump outlet within 1-20 kPa lower than the pressure outside the liquid cooling radiator. And / or includes a first solenoid valve, a sensor, and a vacuum pump. The sensor is connected to the liquid pump outlet, the first solenoid valve is connected to the first injection and discharge port, and the vacuum pump inlet is connected to the first solenoid valve. The sensor detects the pressure at the liquid pump outlet. By starting and stopping the vacuum pump and opening and closing the first solenoid valve, the pressure at the liquid pump outlet is maintained within 1-20 kPa lower than the pressure outside the liquid-cooled radiator. By providing a vacuum pump and sensor, the internal negative pressure of the liquid-cooled radiator is maintained slightly lower than the external negative pressure, preventing liquid leakage. By controlling the intensity of the negative pressure, the impact of negative pressure on evaporation is further reduced.

[0013] Preferably, the first injection and discharge port is connected to a vacuum pump, and the second injection and discharge port is connected to a second solenoid valve, or the second end of the tee is connected to the second solenoid valve, and the third end of the tee is connected to the vacuum pump, or the second end of the tee is connected to the second solenoid valve, and the third end of the tee is connected to the vacuum pump and the first solenoid valve. In this way, the injection and discharge cycle required for exhaust and the replacement of new and old liquids can be fully automatically achieved during injection and discharge.

[0014] A method for injection and discharge is proposed, characterized in that: it includes the above-mentioned liquid cooling radiator, including Step 1: Seal the inside of the liquid cooling radiator from the outside. Step 2: Suction the inside of the base through the first injection outlet to form a strong negative pressure inside the base. Step 3: The strong negative pressure in the base is restored to a weak negative pressure or the external atmospheric pressure.

[0015] By using the injection and drainage method of first pumping out the negative pressure and then partially restoring it, the pressure inside the base is always kept less than or equal to the external air pressure, avoiding the possibility of high pressure generated during the injection and drainage process causing expansion or leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a preferred liquid path device.

[0017] Figure 2 This is a structural diagram of a preferred liquid-cooled radiator equipped with a liquid path device.

[0018] Figure 3 This is a schematic structural diagram of a preferred type of flow resistance asymmetric structure.

[0019] Figure 4 This is a schematic diagram of a preferred liquid cooling radiator structure.

[0020] Reference numerals: 1-base, 11-first flow guide device, 111-end cover, 112-hollow tube, 113-slit, 12-second flow guide device, 13-first injection and discharge port, 14-liquid surface, 2-liquid cooling tube, 3-microchannel liquid cooling head, 4-circulating pump, 5-cooling radiator, 6-flexible capsule, 7-sensor, 8-first solenoid valve, 9-vacuum pump. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] Figure 1This is a schematic diagram of a preferred liquid path device. In the figure, a first flow guide device 11, a second flow guide device 12, and a first injection and discharge port 13 are provided on the base 1. In this embodiment, the first flow guide device 11 and the second flow guide device 12 are both composed of screw rubber caps with slits cut at the ends. The outer diameter of the swingable end cover at the head of the rubber cap is smaller than the inner diameter of the liquid cooling tube 2 outside it, so that the end cover swings with the flow of the cold liquid, and then can be conducted when the cold liquid flows to the left in the figure, so that the flow resistance is extremely small, and closed when it flows to the right, so that the flow resistance is extremely large. The outer diameter of the hollow straight tube at the tail of the rubber cap is larger than the inner diameter of the liquid cooling tube 2, so that the rubber cap can be fixed in the cold liquid tube 2. The first flow guiding device 11 and the second flow guiding device 12 in the figure can also be replaced by a one-way valve, a Tesla valve, a Venturi tube, a conical valve core valve seat, or a duckbill valve, as long as the flow resistance of the forward circulation of the cooling liquid is less than that of the reverse circulation. The positions of the first flow guiding device 11 and the second flow guiding device 12 can be interchanged. The second flow guiding device 12 can also be a large flow resistance device, which includes filter cotton, a filter screen, a flow meter, a turbulator, a microchannel, a slit, a micropore, a liquid cooling head, or a liquid cooling row. As long as the forward flow resistance of the first flow guiding device 11 is less than that of the large flow resistance device and the reverse flow resistance of the first flow guiding device 11 is less than that of the large flow resistance device. After the liquid path device is connected in series into the liquid path through the first flow-guiding device 11 and the second flow-guiding device 12, the first injection and discharge port 13 is injected and discharged, thereby promoting the unidirectional flow of liquid along the forward direction of the first flow-guiding device 11. Specifically, during the discharge process, the reverse flow resistance of the first flow-guiding device 11 is greater than the forward flow resistance of the second flow-guiding device 12, so the cold liquid enters the base 1 through the second flow-guiding device 12. During the injection process, the forward flow resistance of the first flow-guiding device 11 is less than the reverse flow resistance of the second flow-guiding device 12, so the cold liquid leaves the base 1 through the first flow-guiding device 11.

[0025] Figure 2 This is a structural diagram of a preferred liquid-cooled radiator equipped with a liquid path device. Figure 2 The forward flow direction of the first flow guide device 11 is consistent with the direction of the circulating pump 4 in the figure. Figure 2 The first injection and discharge port 13 is located at the inner end of the base 1 above the liquid level, which can facilitate the exhaust and addition of liquid in the base. The first flow guide device 11 in the figure, as the liquid outlet of the liquid path device, is located at the inner end of the base 1 below the liquid level, which can accumulate the gas accompanying the cold liquid circulation process in the base 1 to prevent the gas from entering the circulation pump, causing the circulation pump to run idle due to lack of liquid and unable to circulate. Figure 2The microchannel liquid cooling head 3 is arranged at the rear side of the liquid path device along the cold liquid circulation sequence. Its microchannel also serves as the second flow guide device of the liquid path device, and together with the base 1, the first flow guide device 11 arranged at the base entrance, and the first injection and discharge port 13, forms a liquid path device. During the exhaust operation, the injection and discharge port are repeatedly pumped and injected. During the pumping process, more cold liquid enters the base 1 through the forward flow of the low-resistance first flow guide device 11. During the injection process, more cold liquid leaves the base 1 through the microchannel liquid cooling head, thereby promoting the circulation of cold liquid in the liquid path, and then forcing the gas in the circulation pump 4 to leave to achieve the exhaust purpose.

[0026] In some embodiments, the first flow guiding device 11 does not completely prohibit the reverse flow of the cooling liquid, and its reverse flow direction is the same as the circulation direction of the circulation pump 4. This can better clean the sediment in front of the micro channel.

[0027] In some embodiments, the micro-channel liquid cooling head 3 and the first flow guiding device 11 can be interchanged.

[0028] In some embodiments, when the micro-channel liquid cooling head 3 is located at the front of the liquid path device along the cooling liquid circulation sequence, the first flow guide 11 is located at the base outlet. During the extraction process, the cooling liquid mainly enters the base 1 through the low-resistance micro-channel liquid cooling head 3, and during the injection process, the cooling liquid mainly leaves the base 1 through the positive flow of the low-resistance first flow guide 11.

[0029] When the base 1 is arranged close to the microchannel inlet of the microchannel liquid cooling head 3, the sediment can be separated from the microchannel inlet by flushing with cold liquid during the injection and discharge operation, and finally leave the liquid cooling radiator through the first injection and discharge port to clean the circulating liquid path and solve the problem of reduced flow.

[0030] Figure 2 The presence of the flexible bladder 6 allows more fluid to be drawn out or injected during a single injection or drainage operation, even with the same pressure change, thereby improving injection and drainage efficiency, enhancing the flushing force of the cold liquid, and helping to clear the liquid path. The flexible bladder 6 can be located within the liquid path or on the wall of the liquid path, as long as it can facilitate the entry of more cold liquid into the base when the pressure inside the base is negative.

[0031] Figure 2 It is sufficient that the components are connected in series one by one to form a circulating liquid circuit and a liquid circuit device, and the elastic bag 6 is outside the liquid circuit device. In some embodiments, the radiator 5 can be omitted or replaced with a heat exchanger, a large liquid storage tank or other structures, as long as the effect of the liquid circuit device on the unidirectional propulsion of the cold liquid is not affected.

[0032] Figure 3This is a schematic diagram of a preferred asymmetric flow resistance structure composed of a screw cap. The screw cap is divided into two parts, an end cap 111 and a hollow tube 112, by a slit 113. The outer diameter of the end cap 111 is smaller than the inner diameter of the corresponding cold liquid tube, which is smaller than the outer diameter of the hollow tube 112. This allows the end cap to move away from the hollow tube when the cold liquid flows in the forward direction from the hollow tube to the end cap, forming a structure with low flow resistance. When the cold liquid flows in the reverse direction from the end cap to the hollow tube, the end cap can move closer to the hollow tube, forming a structure with high flow resistance. This achieves the goals of low cost, small size, low forward flow resistance, and high reverse flow resistance. The hollow tube wall thickness of less than 1 mm further reduces flow resistance. The end cap is a convex cap, which can be easily cut from the hollow tube at a point where the outer diameter is smaller than the inner diameter of the cold liquid tube. The outer diameter of the hollow tube is larger than the inner diameter of the cold liquid tube, allowing it to be firmly fixed in the cold liquid tube and prevent movement.

[0033] In some embodiments, the first filling and discharge port 13 can be separated from the extraction channel and the injection channel by adding a tee or opening a second filling and discharge port, and by respectively connecting a new liquid bottle for storing dry cold liquid and an old liquid bottle for storing existing turbid cold liquid, the cold liquid can be replaced more effectively and the amount of new cold liquid used can be reduced.

[0034] In some embodiments, each round of injection and discharge is performed by first withdrawing and then injecting, so as to always keep the pressure inside the base 1 less than or equal to the external atmospheric pressure, thereby effectively avoiding the expansion or leakage of high-pressure hard gas.

[0035] Figure 4 Compared to Figure 2 A sensor 7 is added to the outlet of the circulating pump 4 to detect the pressure there. A vacuum pump 9 is added to the first injection and discharge port to automatically pump it out. A first solenoid valve 8 can be added between the vacuum pump 9 and the first injection and discharge port 13 to improve airtightness. The sensor 7 detects the pressure at the outlet of the circulating pump 4. The detected pressure value is used to control the start and stop of the vacuum pump 9 and the opening and closing of the first solenoid valve 8 to maintain the pressure there within the range of -1kPa to -20kPa. Furthermore, the pressure can be kept within the range of -3kPa to -10kPa. The lower the negative pressure intensity, the lower the evaporation of the cold liquid. Due to the flow resistance in the circulating liquid path, the circulating pump 4 needs to overcome the flow resistance to promote the circulation of the cold liquid. Therefore, the outlet of the circulating pump 4 is the highest pressure point in the liquid-cooled radiator. As long as the pressure at the highest pressure point is maintained below the external atmospheric pressure, negative pressure can be maintained at any position in the liquid-cooled radiator. Therefore, after damage, liquid will not leak out, but air will take in.

[0036] In some embodiments, during the extraction process, the vacuum pump is started to extract air to form a negative pressure. During the discharge process, the injection and discharge ports are opened to make the internal and external pressures equal, making the injection and discharge operations more convenient.

[0037] In some embodiments, by adding a second injection and discharge port and setting a second solenoid valve at the second injection and discharge port, or setting a tee at the first injection and discharge port, and setting a vacuum pump and a second solenoid valve at the other two channels of the tee respectively, the vacuum pump is started and the second solenoid valve is closed during extraction, and the vacuum pump is stopped and the second solenoid valve is turned on during injection. The above operations are repeated to automatically complete the exhaust of the circulating pump, the replacement of the cold liquid, or the cleaning of the liquid circuit without manual operation, thereby further simplifying the injection and discharge operations.

[0038] In some embodiments, a liquid-cooled radiator injection and discharge method is used for the liquid-cooled radiator. The general summary is to first pump out negative pressure inside and then restore some pressure to the inside. During this process, the liquid-cooled radiator is always kept at negative pressure to prevent leakage while promoting the circulation of the cold liquid, thereby completing the exhaust of the circulation pump or the replacement of the cold liquid or the cleaning of the sediment or the injection or drainage of the liquid. Specifically, the inside of the liquid-cooled radiator is first isolated from the outside world, and then the liquid is pumped outward through the first injection and discharge port to form a strong negative pressure inside the liquid-cooled radiator. The cold liquid in the liquid-cooled radiator flows into the base 1, and then air or cold liquid is injected into the base 1 to weaken the strong negative pressure inside the base 1. At this time, the cold liquid leaves the base 1, forming a flow of cold liquid, pushing bubbles to leave the circulation pump from the outlet of the circulation pump 4, or pumping out the old cold liquid, sucking in new cold liquid, or discharging sediment.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fluid path device, characterized in that: The invention comprises a base, wherein the base is provided with three mutually connected channels, each of the channels is respectively connected to a first flow guiding device, a second flow guiding device and one of the first injection and discharge ports, the first flow guiding device comprises an asymmetric flow resistance structure, the asymmetric flow resistance structure comprises a one-way valve or a Tesla valve or a Venturi tube or a conical valve core valve seat or a duckbill valve, the second flow guiding device comprises an asymmetric flow resistance structure or a large flow resistance structure, the large flow resistance structure comprises filter cotton or a filter screen or a flow meter or a turbulator or a microchannel or a slit or a micropore or a liquid cooling head or a liquid cooling row, the forward flow resistance of the asymmetric flow resistance structure is smaller than the flow resistance of the large flow resistance structure, and the reverse flow resistance of the asymmetric flow resistance structure is smaller than that of the asymmetric flow resistance structure, when the first flow guiding device and the second flow guiding device are both asymmetric flow resistance structures, their forward directions are the same, the liquid path device is connected in series into the liquid path through the first flow guiding device and the second flow guiding device, and the first injection and discharge port connects the inside and outside of the liquid path.

2. A liquid cooling radiator, characterized in that: It includes a liquid circuit device as described in claim 1, which is connected in series in the circulating liquid circuit of the liquid-cooled radiator, one of the first guide device and the second guide device is located below the liquid level in the base and its positive direction is toward the outside of the base, and the injection and discharge port is located above the liquid level in the base.

3. The liquid cooling radiator according to claim 2, characterized in that: The forward direction of the first flow guiding device is the same as the circulation direction of the cooling liquid in the liquid-cooling radiator.

4. The liquid cooling radiator according to claim 2, characterized in that: It includes a flexible sac, which includes an air bag, a bubble or a piston. The flexible sac is arranged in the circulation liquid circuit of the liquid-cooled radiator and is located outside the liquid circuit device. As the pressure in the circulation loop increases, the volume of the circulation liquid circuit occupied by the flexible sac decreases, and as the pressure decreases, the volume of the circulation liquid circuit occupied by the flexible sac increases.

5. The liquid cooling radiator according to claim 2, characterized in that: The base is arranged at a place where sediments accumulate, and the place where sediments accumulate includes a liquid inlet of a micro-channel of a liquid cooling head or an inlet of a filter.

6. The liquid cooling radiator according to claim 2, characterized in that: The one-way valve is composed of a convex head screw rubber cap, which includes a convex cover at the front end and a hollow tube at the rear end. The convex cover is only partially connected to the hollow tube. The outer diameter of the hollow tube is larger than the inner diameter of the cold liquid pipeline so that it can be fixed in the cold liquid pipeline. The outer diameter of the convex cover is smaller than the inner diameter of the cold liquid pipeline so that it can rotate around the connection with the hollow tube in the cold liquid pipeline when impacted by the cold liquid.

7. The liquid cooling radiator according to claim 2, characterized in that: The base is provided with a second injection and discharge port, or the first injection and discharge port is connected to the first end of the tee.

8. The liquid cooling radiator according to claim 2, wherein: The device comprises a sensor and a vacuum pump, wherein the sensor is connected to the outlet of the liquid pump, and the inlet of the vacuum pump is connected to the first injection and discharge port. The sensor detects the pressure at the outlet of the liquid pump, and the pressure at the outlet of the liquid pump is maintained within 1 to 20 kPa lower than the pressure outside the liquid cooling radiator by starting and stopping the vacuum pump. And / or includes a first solenoid valve, a sensor, and a vacuum pump, the sensor is connected to the liquid pump outlet, the first solenoid valve is connected to the first injection and discharge port, the vacuum pump inlet is connected to the first solenoid valve, the sensor detects the pressure at the liquid pump outlet, and maintains the pressure at the liquid pump outlet within 1~20kPa lower than the pressure outside the liquid cooling radiator by starting and stopping the vacuum pump and opening and closing the first solenoid valve.

9. The liquid cooling radiator according to claim 8, characterized in that: The base is provided with a second injection and discharge port, the first injection and discharge port is connected to the vacuum pump, the second injection and discharge port is connected to the second solenoid valve, or the first injection and discharge port is connected to the first end of the tee, the second end of the tee is connected to the second solenoid valve, and the third end of the tee is connected to the vacuum pump, or the second end of the tee is connected to the second solenoid valve, and the third end of the tee is connected to the vacuum pump and the first solenoid valve.

10. A method for filling and draining a liquid cooling radiator, characterized in that: A liquid cooling radiator according to any one of claims 2 to 9, comprising Step 1: Seal the inside of the liquid cooling radiator from the outside. Step 2: Suction the inside of the base through the first injection outlet to form a strong negative pressure inside the base. Step 3: The strong negative pressure in the base is restored to a weak negative pressure or the external atmospheric pressure.

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