Negative pressure structure of liquid coolers, negative pressure monitoring methods, liquid coolers

Abstract

This invention relates to a negative pressure structure, a negative pressure liquid-cooled radiator, and a negative pressure monitoring method. The negative pressure structure includes a gas-liquid pump. The inlet of the gas-liquid pump is connected to the gas in the gas collecting device through a first outlet above the liquid surface. The gas collecting device has a second inlet and a third outlet connected in series to enter the liquid path of the liquid cooling system. The third outlet is located below the liquid surface, allowing the cold liquid in the liquid cooling system to flow through the gas collecting device and causing air bubbles in the cold liquid to float and concentrate at the upper end of the gas collecting device. The gas collecting device can be added to the original liquid cooling system, or an outlet hole can be added above the liquid surface of an existing liquid storage device or a container with a liquid storage function in the original liquid cooling system and connected to the inlet of the gas-liquid pump, so that the container replaces the gas collecting device. The first outlet is provided with a fluid unidirectional conduction device facing the gas-liquid pump, so that the liquid or gas in the gas collecting device can only flow out of the gas collecting device.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology for heat dissipation of electronic circuit equipment, including computer mainframes, power supplies, and charging piles, specifically to the negative pressure structure of liquid cooling radiators, negative pressure monitoring methods, and liquid cooling radiators. Background Technology

[0002] With the development of technology, the power consumption of electronic devices such as computers and charging piles is gradually increasing, and their heat dissipation needs are becoming increasingly urgent. Currently, there are three main types of heat sinks on the market, but their effects are not ideal: 1. Passive heat sinks, which only have heat sinks and insufficient heat dissipation capacity; 2. Air-cooled heat sinks, which add fans to the heat sinks to enhance heat dissipation capacity, but also generate a lot of noise; 3. Liquid-cooled heat sinks. Currently, most liquid-cooled heat sinks on the market are positive pressure heat sinks, which means that the water pump pumps water to the liquid cooling head, and the liquid expands due to heat, causing the internal pressure of the liquid circuit, including the liquid cooling head, to be greater than the external atmospheric pressure. Once damaged, it will leak out. Since the liquid cooling head interface is currently inside the chassis, once it leaks, it can easily cause serious electrical damage.

[0003] The solutions in existing patents CN201910733274.4 and CN201910244160.3 both involve releasing pressure after the internal hydraulic pressure exceeds a threshold. The internal hydraulic pressure of their liquid-cooled radiators is greater than that of the external pressure, and leakage cannot be avoided once they are damaged.

[0004] The solution proposed in the existing patent CN103699195B is too rudimentary. First, due to the lack of a one-way valve or other devices, the negative pressure device needs to be constantly activated, which is not environmentally friendly and generates noise, affecting the user experience. Second, due to the lack of a variable volume chamber and the fact that the coolant is almost incompressible, the negative pressure device cannot change the coolant level when the third interface of the coolant tank is above the liquid surface, making this solution impractical. Third, because it has a preset time value and the negative pressure device only starts after the liquid coolant radiator has been working for a preset time, it cannot prevent coolant leakage from the liquid coolant radiator before the negative pressure device starts. Finally, because the components in the liquid coolant radiator have different water resistances, and the currently popular water cooling heads use jet technology, which requires high pressure and results in high water resistance, even if the negative pressure device extracts gas from the liquid coolant radiator, it cannot guarantee that there will be local water pressure higher than the outside pressure between the water pump outlet and the high water resistance components. When this area is damaged, coolant leakage is entirely possible. Summary of the Invention

[0005] To address the aforementioned shortcomings, a negative pressure structure, a negative pressure monitoring method, and a liquid cooling radiator are proposed to solve the problems of leakage and related electrical faults that occur when liquid cooling is used for equipment containing electronic circuits.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A negative pressure structure is disclosed, including a manual air extraction device such as a syringe, an air extraction cylinder, or a gas-liquid pump such as a diaphragm pump, a gear pump, or a peristaltic pump. The inlet of the manual air extraction device or the gas-liquid pump is connected to the gas in the gas collection device through a first outlet located above the liquid surface in the gas collection device, forming a first passage. The gas or liquid in the first passage is pumped out of the gas collection device by the gas-liquid pump. The gas collection device is a container made of a material that prevents coolant leakage, such as silicone, plastic, or metal, capable of storing solution without leakage. It has a second inlet and a third outlet connected in series into the liquid circuit of a liquid-cooled radiator. The third outlet is located below the liquid surface. When the coolant in the liquid-cooled radiator flows through the gas collection device, air bubbles in the coolant rise and concentrate at the upper end of the gas collection device. The gas collection device can be connected in series as a separate component into the original liquid-cooled radiator, or it can be combined with an existing liquid storage device or container with liquid storage function in the original liquid-cooled radiator. That is, the first outlet is added above the liquid surface in the container and connected to the manual air extraction device or the inlet of the gas-liquid pump so that the container replaces the gas collection device, forming the first passage. The liquid cooling system is kept under negative pressure through the first passage, so that the coolant will not leak when it is damaged. With a gas-liquid pump of appropriate power, it can even continue to be used normally after the damage, as long as the amount of gas discharged by the gas-liquid pump is greater than the amount of gas sucked in through the rupture port.

[0007] In at least one specific embodiment of the present invention, the energy required by the gas-liquid pump, such as electrical energy and high-pressure gas energy, is obtained from outside the device to be cooled, rather than solely from the device to be cooled, so that the device to be cooled can be powered off as needed without affecting the operation of the negative pressure structure, so as to keep the internal pressure of the liquid cooling system always lower than that of the outside.

[0008] In at least one specific embodiment of the present invention, the suction head of the gas-liquid pump is greater than the head of the water pump in the liquid cooling system, and the pressure at the outlet of the water pump in the liquid cooling system is lower than the external pressure regardless of whether the water pump is running or stopped. This avoids the possibility of leakage caused by local pressure exceeding the external pressure due to liquid flow resistance and water pump pressure in the liquid cooling system.

[0009] In at least one embodiment of the present invention, the second inlet is connected to the water pump outlet of the liquid cooling system, the water pump inlet is connected to the outlet of other components within the liquid cooling system, and the inlets of the other components within the liquid cooling system are connected to the third outlet of the gas collecting device or container. Safety is achieved by directly connecting the water pump outlet to the gas collecting device to reduce the positive pressure at the water pump outlet.

[0010] In at least one specific embodiment of the present invention, a liquid replenishment device is included. The liquid replenishment device is a sealed container, such as a bottle, can, bag, or piston chamber, made of a leak-proof material such as plastic, glass, rubber, or metal, and has a liquid outlet. It is connected in series or parallel within the liquid-cooled radiator. After prolonged use, the liquid in the liquid-cooled radiator evaporates and dissipates. By providing the liquid replenishment device, the liquid is automatically and continuously replenished, preventing the risk of heat dissipation failure due to insufficient liquid.

[0011] In at least one specific embodiment of the present invention, the liquid replenishment device is connected in series or in parallel to the water pump outlet inside the liquid-cooled radiator. The liquid replenishment device reduces the positive pressure at the water pump outlet to prevent the local pressure from exceeding the external atmospheric pressure due to excessively high water pump outlet pressure and excessive water resistance in other components inside the liquid-cooled radiator.

[0012] In at least one specific embodiment of the present invention, the liquid replenishment device includes a housing, which is partially or entirely a piston and piston chamber structure. The piston and piston chamber structure are sealed and slidably connected, with one component fixed or integrated into the housing and the other component being a moving component. The housing is sealed and forms a sealed variable-volume cavity through the movement of the moving component. Alternatively, the housing may be a deformable part made of a flexible material such as silicone, rubber, plastic film, or corrugated pipe. The housing is sealed and changes its volume through the deformation of the deformable part to form a sealed variable-volume cavity. After the variable-volume cavity reduces its volume, it is sealed and connected in parallel to the liquid cooler through a liquid inlet at a parallel connection point within the liquid cooler, or sealed and connected in series through inlet and outlet liquid inlets at series connection points within the liquid cooler, thus sealing the variable-volume cavity and connecting it to the coolant inside the liquid cooler. At least one of a1, a2, a3, or a4 is satisfied, such that the coolant pressure in the liquid path from the fluid pump inlet to the parallel or series connection point in the reverse flow direction of the coolant inside the liquid cooler is less than the external atmospheric pressure. The deformable portion described in a1 is made of an elastic material such as silicone or rubber, possessing elasticity greater than the force required for the variable-volume cavity to recover at least a portion of its volume after the liquid-cooled radiator is damaged. a2 is provided with a device inside or outside the variable volume cavity that increases potential energy due to the reduction of the volume of the variable volume cavity. The force generated by the device is greater than the force required for the variable volume cavity to recover at least part of its volume after the liquid cooling radiator is damaged. a3 The variable volume cavity described herein is equipped with a power device, such as a motor, pressure pump, or electromagnet, which directly or indirectly applies power to the cavity within the variable volume cavity, causing displacement as the volume changes, either through a transmission device such as a push rod, cable, or pressure transmission device such as a pipeline or piston. The force acting on the cavity causing displacement is greater than the force required for the variable volume cavity to recover at least a portion of its volume after the liquid-cooled radiator is damaged. a4 The volume to be restored in at least part of the variable volume cavity is located below the elevation of all the cold liquids in the liquid passage section where the internal cold liquid pressure needs to be lower than the external atmospheric pressure through the negative pressure structure. The variable volume cavity contains cold liquid, and the variable volume cavity can be restored to at least part of its volume by the gravity of the cold liquid in the variable volume cavity after a break is created in the liquid passage section where the internal cold liquid pressure needs to be lower than the external atmospheric pressure through the negative pressure structure.

[0013] In at least one specific embodiment of the present invention, the device for increasing potential energy includes a device for elastic potential energy, such as a spring or a sheet spring. In the device, one end of each end whose relative position changes is mounted on a housing, and the other end is mounted on a deformable portion or another housing sealed together through a deformable portion. One end of the device is mounted on a housing or a fixed component, and the other end is mounted on a moving component. The device for increasing potential energy also includes a device for pressure potential energy, such as a bladder or a piston structure. In the device, one end of each end whose relative position changes is mounted on a housing, and the other end is mounted on a deformable portion or another housing sealed together through a deformable portion. The device for increasing potential energy includes a magnetic potential energy device such as a magnet pair or a magnet and a magnetized object such as iron, cobalt, or nickel, wherein one end of the device is mounted on the housing or a fixed part and the other end is mounted on a deformable part or another housing sealed together through the deformable part. The device also includes a gravitational potential energy device such as a counterweight or a weight. The device is directly or indirectly connected to the deformable part or the moving part through a force transmission mechanism such as a lever, a fixed pulley, or a rope.

[0014] In at least one specific embodiment of the present invention, the shell is provided with at least a frame or outer shell to reserve space to accommodate the shell after the volume is increased, and to protect the shell.

[0015] In at least one specific embodiment of the present invention, the liquid replenishment device includes a housing, the housing being sealed to form a sealed cavity, the sealed cavity having at least one vent sealingly connected to the external atmospheric pressure, the liquid level inside the sealed cavity always being lower than the vent, the sealed cavity being sealed and connected in parallel to the liquid cooler through a liquid outlet at a parallel connection point inside the liquid cooler, the liquid outlet or a pipe sealed to the liquid outlet being immersed in the cold liquid at the inner end of the sealed cavity, or the sealed cavity being sealed and connected in series to the liquid cooler through an inlet and outlet at a series connection point inside the liquid cooler, the outlet or a pipe sealed to the outlet being immersed in the cold liquid at the inner end of the sealed cavity.

[0016] In at least one specific embodiment of the present invention, a pressurized fluid one-way flow device, such as a pressurized check valve or a pressure relief valve, is provided between the liquid outlet of the replenishing device and the liquid-cooled radiator. This ensures that the coolant in the replenishing device can flow into the liquid-cooled radiator only after the pressure of the coolant inside the radiator is lower than the external atmospheric pressure by a preset value. By setting the pressurized fluid one-way flow device, a relatively high negative pressure is maintained inside the liquid-cooled radiator, increasing the suction force on the outside air at the break point when the liquid-cooled radiator is damaged, thereby improving safety performance.

[0017] In at least one specific embodiment of the present invention, the liquid outlet of the replenishing device is connected to the liquid cooler via two pipelines or via a T-joint connector. The first interface of the T-joint connector is connected to the liquid outlet of the replenishing device / liquid cooler, and the second and third interfaces are both connected to the liquid cooler / replenishing device. Each of the two pipelines or the second and third interface pipelines is provided with a counter-current unidirectional fluid conduction device, so that it can only conduct in one direction. The unidirectional fluid conduction device in the path from the replenishing device to the liquid cooler is a pressurized unidirectional fluid conduction device. When the pressure inside the liquid cooler is lower than the pressure of the replenishing device and a preset pressure difference is reached, the device is activated to allow the cold liquid in the replenishing device to flow into the liquid cooler. The unidirectional fluid conduction device in the path from the liquid cooler to the replenishing device does not have a preset pressure, and its forward opening pressure is less than 5 kPa, so that the cold liquid in the liquid cooler can flow into the replenishing device through the liquid level difference. By setting a fluid unidirectional flow device in the opposite direction to the pressurized fluid unidirectional flow device, when the internal pressure of the liquid-cooled radiator tends to the outside after damage or evaporation, the liquid can flow back into the liquid replenishment device, thus improving overall safety.

[0018] In at least one specific embodiment of the present invention, when the liquid replenishment device is connected in parallel to the external liquid path through a liquid port, the negative pressure structure is connected in parallel to the external liquid path through a guide multi-channel. The guide multi-channel includes at least a first port that seals and connects the inlet of the internal first liquid path and the external liquid path, a second port that seals and connects the outlet of the internal second liquid path and the external liquid path, and a third port that seals and connects the internal third liquid path and the variable volume cavity or sealed cavity inside the negative pressure structure. The internal first liquid path, the internal second liquid path, and the internal third liquid path are located inside the guide multi-channel and are interconnected. When the cold liquid flows from the internal second liquid path to the internal first liquid path or from the internal first liquid path to the internal second liquid path, the turning angle is greater than 90 degrees. When the cold liquid flows from the internal third liquid path to the internal second liquid path or from the internal second liquid path to the internal third liquid path, the turning angle is less than 90 degrees. That is, when the cold liquid flows in from the internal first liquid path or the internal second liquid path, it preferentially flows out from the internal third liquid path. By setting up a multi-channel guide, the cold liquid pumped out by the water pump is preferentially introduced into the liquid replenishment device, thereby further maintaining a negative pressure between the liquid replenishment device outlet and the water pump inlet.

[0019] In at least one specific embodiment of the present invention, the negative pressure structure includes a liquid-storing heat dissipation blanket. The liquid-storing heat dissipation blanket is made of a liquid-resistant soft film such as rubber, silicone, polyethylene, polypropylene, aluminum film, etc., and is bag-shaped. The bag opening is sealed to form a sealed bag. Inlet and outlet pipes are led out and connected in series in the liquid-cooled radiator. The heat dissipation blanket has a flat area of ​​more than 0.2 square meters. The sealed bag is laid flat on the heat transfer surface such as the ground, table, or wall. The inside stores cold liquid. The purpose of eliminating the need for fan heat dissipation is achieved by contacting the heat transfer surface with a large area.

[0020] In at least one specific embodiment of the present invention, the liquid storage heat dissipation blanket is connected in series at the water pump outlet of the liquid-cooled radiator.

[0021] In at least one specific embodiment of the present invention, the first passage is provided with a fluid one-way flow device so that the gas or liquid in the gas collecting device or the container can only flow out, while outside air cannot enter the gas collecting device or the container through the first passage. Alternatively, the first passage is provided with a switch to control the opening or closing of the first passage. The fluid one-way flow device is such as a one-way valve, a pressure relief valve, or a check valve. The switch is such as a ball valve, an electromagnet, a torque motor, a gear, or other device capable of clamping the pipeline of the first passage or blocking or closing the first passage. This allows the gas-liquid pump to maintain the internal pressure of the liquid cooling system lower than the external pressure without constant operation.

[0022] In at least one specific embodiment of the present invention, a fourth inlet is provided on the gas collecting device or container or on the first passage to connect the outside world with the gas pressure inside the gas collecting device or container. The fourth inlet is provided with a pressurized fluid one-way flow device, such as a pressure relief valve or a pressurized one-way valve. The pressurized fluid one-way flow device allows the outside gas to enter the gas collecting device in one direction only when the pressure inside the gas collecting device is too low, that is, when the pressure difference between the inside and outside of the gas collecting device is greater than the opening pressure of the pressurized fluid one-way flow device. This controls the negative pressure inside the liquid-cooled radiator to be within a preset range, and prevents the liquid in the liquid-cooled radiator from boiling due to excessively low boiling point caused by excessively low negative pressure.

[0023] In at least one specific embodiment of the present invention, a control device is included. The control device includes at least one of a manual type and an automatic type. When the gas-liquid pump is driven by electrical power, the control device is electrically connected to the gas-liquid pump. The manual type includes switches such as contact switches, self-locking switches, time-delay switches, and self-resetting switches. When the gas-liquid pump is driven by high-pressure gas, the control device is connected to a pneumatic pipeline connected to the gas-liquid pump. The manual type includes pneumatic switches such as ball valves and stop clamps. The switches are connected in series in the gas-liquid pump circuit or installed on the pneumatic pipeline to control the operation and stop of the gas-liquid pump. The automatic type includes sensors such as capacitance, resistance, voltage, current sensors, pressure, intensity sensors, and position sensors. The controller includes components such as solenoid valves, relays, contact switches, time delay switches, diodes, transistors, pneumatic switches, and integrated control circuits. The controller is connected in series or parallel to the gas-liquid pump circuit or the pneumatic pipeline. The automatic type has at least one threshold to determine whether the gas pressure or volume, liquid volume or hydraulic pressure, liquid level, or liquid weight in the gas collecting device exceeds the threshold, and accordingly turns the gas-liquid pump on or off to control the gas or cold water pressure in the gas collecting device to be lower than the external pressure. The threshold includes the liquid level height, weight, pressure, volume, gas volume, pressure, resistance, capacitance, voltage, and current of the cold liquid or gas in the gas collecting device. The control device does not include controlling the water pump speed in the liquid cooling system.

[0024] In at least one specific embodiment of the present invention, the control device is provided with a delay device such as a delay switch, a delay module, or a capacitor when there is only one threshold. The delay device is electrically connected to the sensor or the controller, so that the sensor delays sending the next signal, or the controller delays receiving the next signal, or delays controlling the gas-liquid pump to stop, so as to avoid damage caused by frequent start-stop of the gas-liquid pump.

[0025] In at least one specific embodiment of the present invention, a safety device is provided at the end of the first passage. The safety device is a container made of a material that prevents coolant leakage, such as silicone, plastic, or metal, capable of storing the solution without leakage. A vent hole is provided above the liquid surface inside the safety device to connect to other components within the first passage or to the external atmosphere. By adding the safety device, the risk of damage to electrical components caused by the coolant overflowing from the first passage through the gas collection device due to potential damage to the liquid cooling system, resulting in excessive foam and volume expansion, is avoided.

[0026] In at least one specific embodiment of the present invention, an alarm device is electrically connected to the gas-liquid pump or control device. The alarm device is equipped with sensors such as capacitance, current, voltage, resistance, and pressure sensors, or delay devices such as delay switches, delay modules, or preset time values. It also includes an alarm device such as a light or buzzer for both sound and light. The alarm is activated when the sensor detects that the interval between the two most recent starts of the gas-liquid pump is less than the preset time value, or the continuous start time exceeds the preset time value, or the total start time of the gas-liquid pump within a fixed period exceeds the preset time value, or the air pressure inside the liquid-cooled radiator is greater than a set value. By setting the alarm, the user is further alerted to the abnormal working state of the liquid-cooled radiator, and the user can also determine whether the negative pressure structure has failed.

[0027] A negative pressure liquid cooling radiator is disclosed, comprising the aforementioned negative pressure structure.

[0028] A negative pressure monitoring method is disclosed, specifically as follows: When there is only one threshold, the following steps are included: S11 detects the gas volume, pressure, cold liquid volume, or liquid level in the gas collection device through sensors. If the threshold is not met, a first signal is generated. After S12 transmits the first signal to the controller, the controller controls the gas-liquid pump to start according to the first signal. After the gas-liquid pump in S13 starts, the delay device is activated and causes the controller to delay receiving the next signal or delay controlling the gas-liquid pump or the sensor to delay sending the next signal. After the S14 delay module stops, the sensor re-detects and sends a signal. If the threshold is still not met, the sensor repeatedly sends the first signal. The controller receives the signal and controls the gas-liquid pump to continue operating. S15 After the threshold is met, the sensor sends a second signal, the controller receives the second signal and controls the gas-liquid pump to stop. When multiple thresholds are set, the multiple thresholds are arranged sequentially as the 1st, 2nd...nth thresholds, including the following steps: S21 detects the gas volume, pressure, cold liquid volume, or liquid level in the gas collection device through sensors. If none of these conditions are met, signal 0 is generated. After S22 transmits the 0th signal to the controller, the controller controls the gas-liquid pump to operate at a corresponding preset power according to the 0th signal. S23 When the first threshold is met but the second threshold is not met, the sensor sends a first signal, and the controller controls the gas-liquid pump to operate at a corresponding preset power according to the first signal; S24 When the (n-1)th threshold is met but the nth threshold is not met, the sensor sends the (n-1)th signal, and the controller controls the gas-liquid pump to operate at a corresponding preset power according to the (n-1)th signal; When the nth threshold is met, the sensor sends the nth signal, and the gas-liquid pump operates at a corresponding preset power. When the corresponding power is 0, the gas-liquid pump stops.

[0029] The beneficial effects of this invention are as follows: By setting up a gas-liquid pump to create a negative pressure throughout the liquid-cooled radiator, the leakage problem is solved; by setting up a one-way valve to reduce the starting frequency and noise of the gas-liquid pump, the boiling of the coolant caused by excessively low pressure inside the liquid-cooled radiator is avoided; by setting up a liquid replenishment device, the problems of coolant shortage caused by coolant evaporation, mismatch between the control device threshold and the reduced coolant, and local high pressure inside the liquid-cooled radiator are solved; when the liquid-cooled radiator leaks, as long as the outward exhaust volume of the gas-liquid pump is greater than the inlet volume at the leak point, the liquid-cooled radiator can still remain leak-free; and a safety device is provided at the outlet of the gas-liquid pump, so that even if the coolant overflows from the gas collection device, it will be confined within the safety device. At the same time, the noise generated by the gas-liquid pump running at full power for a long time alerts the user and provides sufficient time for handling. Attached Figure Description

[0030] Figure 1 This is an example of a preferred liquid-cooled radiator with a negative pressure structure.

[0031] Figure 2 The four preferred installation methods for the control device 12 are as follows.

[0032] Figure 3 The liquid replenishment device 3 can be connected to the liquid cooling radiator in two forms: either in parallel or in series.

[0033] Figure 4 Flowchart of control device 12 with only one threshold and a delay module.

[0034] Figure 5 The flowchart is for the control device 12 with multiple thresholds.

[0035] Figure 6 Several structures of the housing 100 of the preferred liquid replenishment device 3 are described.

[0036] Figure 7 Several structures are preferred, using springs or counterweights as variable-volume cavities to generate a rebound force when the volume changes.

[0037] Figure 8 The diagram shows the structure of the preferred guide tee.

[0038] Explanation of key figure labels: 1-Gas-liquid pump, 11-Fluid unidirectional conduction device, 12-Control device, 2-Original liquid-cooled radiator, 21-Gas collection device / liquid storage device, 211-First outlet, 212-Second inlet, 213-Third outlet, 22-Water pump, 23-Other components of liquid-cooled radiator, 24-Cold liquid, 25-Gas, 3-Liquid replenishment device, 4-Pipeline, 5-Safety device, 100-Housing, 110-Variable volume chamber, 120-Piston, 130-Piston chamber, 210-Spring, 220-Counterweight, 230-Cable, 240-Fixed pulley, 710-Port 1, 720-Port 2, 730-Port 3. Detailed Implementation

[0039] To more clearly illustrate the technical solutions of the present invention, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings or embodiments can be obtained based on these drawings or embodiments without any creative effort. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] At least one specific embodiment of the present invention provides as follows Figure 1 The embodiment of a liquid-cooled radiator shown includes a negative pressure structure, a safety device 5, and a liquid replenishment device 3. It includes a gas-liquid pump 1, a fluid unidirectional flow device 11, a primary liquid-cooled radiator 2, a gas collection device / liquid storage device 21, a water pump 22, other components of the liquid-cooled radiator 23, a coolant 24, and a pipeline 4.

[0041] The liquid storage device 21 can typically be any water tank used in a computer water-cooling system, as long as it can safely and leak-proofly store and transport the coolant 24. The structure falls within the scope of technology understood by those skilled in the art, and is not shown in detail in the drawings. The water pump 22 can be any water pump used in computer water-cooling equipment, such as a submersible pump, a dry-type pump, or a centrifugal or piston pump. In this embodiment, a centrifugal pump is used as an example. Since the pump components fall within the scope of technology understood by those skilled in the art, they are not shown in the drawings and are not described in detail. The coolant 24 can be water, alcohol, or other liquids. Preservatives such as glycerin or cleaning agents can be added to the water. The pipeline 4 can have any structure and material; for example, it can be a steel pipe, copper pipe, or plastic hose, as long as it can transport the coolant.

[0042] In this specific embodiment, the gas collection device 21 is replaced by adding a first outlet 211 above the liquid surface to the original liquid storage device 21 in the liquid-cooled radiator 2. The gas-liquid pump 1 and the fluid one-way flow device 11, such as the inlet of a one-way valve, are all directed towards the gas collection device 21 and connected in series with the first outlet 211 to form a first passage between the gas inside the gas collection device 21 and the external atmospheric pressure. The fluid one-way flow device 11 ensures that the gas or coolant in the first passage can only flow out of the liquid-cooled radiator 2 in one direction through the pumping of the gas-liquid pump. The third outlet 213 is connected in series with the water pump 22 and other components 23 of the liquid-cooled radiator through the pipeline 4. The coolant 24 starts from the gas collection device 21 through the third outlet, is pumped by the water pump 22, flows through the other components 23 of the liquid-cooled radiator, and returns to the gas collection device 21 through the second inlet 212 to form a cycle. The connection order of the water pump 22 and the other components 23 of the liquid-cooled radiator is arbitrary.

[0043] Preferably, the fluid unidirectional conduction device 11 can also be replaced by a gas circuit switch, which is turned on after the gas-liquid pump starts and turned off before the gas-liquid pump stops, thus achieving the purpose of maintaining negative pressure inside the liquid-cooled radiator.

[0044] Preferably, a safety device 5 can be added to the first passage. The safety device 5 has an inlet and an outlet connected in series within the first passage or between the first passage and the external atmospheric pressure. The outlet elevation is higher than the liquid level inside the safety device 5. By setting the safety device 5, it is prevented that if the liquid cooler is damaged, the coolant will foam due to air intake, causing the coolant volume to expand. This would raise the liquid level in the air collection device 21, causing the coolant to be pumped out of the liquid cooler by the air-liquid pump, thus affecting external electrical equipment.

[0045] Preferably, the installation order of the components in the first passage, such as the gas-liquid pump 1, the safety device 5, and the fluid unidirectional conduction device 11, can be arranged arbitrarily.

[0046] Preferably, the third outlet 213 may also be located below the liquid surface.

[0047] Preferably, a liquid replenishment device 3 can be added at local high pressure points in the liquid-cooled radiator 2, such as at the inlet of the water cooling head, to avoid the possibility of leakage caused by excessive water resistance in a component of the liquid-cooled radiator, such as the water cooling head, due to excessively high pump pressure at the water pump outlet.

[0048] Preferably, the liquid replenishment device 3 is connected in parallel to the liquid-cooled radiator 2 via a fluid unidirectional flow device 11, such as a one-way valve.

[0049] Preferably, the liquid replenishment device 3 should be connected to a liquid-cooled radiator at the outlet of the water pump 22 to minimize local high pressure.

[0050] Preferably, the water pump 22 can also be connected to the third outlet 213 to connect to the liquid storage device / gas collection device 21, and the water pump 22 inlet is connected to the outlet of other components of the liquid-cooled radiator. The second inlet 212 needs to be located below the liquid surface, in which case the liquid replenishment device 3 can be omitted.

[0051] In at least one specific embodiment of the present invention, the gas-liquid pump 1 is always connected to an external circuit and can be started at any time to ensure that the liquid-cooled radiator is always under negative pressure.

[0052] In at least one specific embodiment of the present invention, the gas collecting device 21 is further provided with a fourth inlet above the liquid surface to connect to a fluid one-way flow device 11, such as a pressure relief valve or a pressurized one-way valve, so that outside air can flow into the gas collecting device 21 under a certain pressure. If the pressure inside the gas collecting device 21 is too low due to the gas-liquid pump 1 being started for too long, the opening pressure of the pressurized one-way valve is overcome to allow outside air to enter the gas collecting device 21, ensuring that the pressure inside the gas collecting device 21 is within a certain range and preventing the coolant 24 inside the liquid-cooled radiator 2 from boiling due to the low pressure inside the gas collecting device 21.

[0053] In at least one specific embodiment of the present invention, a control device 12 is included. The control device 12 is electrically connected to the gas-liquid pump 1. The control device 12 includes at least one of manual and automatic types. The manual type includes a switch electrically connected to the gas-liquid pump 1, such as a contact switch, a self-locking switch, a time-delay switch, or a self-reset switch. The opening and closing of the gas-liquid pump 1 is controlled by manually controlling the opening and closing of the switch. The automatic type includes sensors such as capacitance, resistance, voltage, current sensors, pressure, and position sensors, and controllers such as relays, contact switches, time delay switches, diodes, transistors, and integrated control circuits. The automatic type has at least one threshold to control the start and stop of the gas-liquid pump 1. The sensors detect the gas pressure, volume, liquid volume, hydraulic pressure, liquid level, or liquid weight inside the gas collecting device 21 and transmit the signal to the controller. The controller compares the signal with the threshold and controls the gas-liquid pump 1 to start or stop according to a preset power or preset duration, so as to control the gas or cold liquid pressure inside the gas collecting device 21 to be lower than the external pressure. The threshold includes parameters such as the cold liquid level height, weight, pressure, volume, gas volume, pressure, resistance, capacitance, voltage, and current of the cold liquid or gas inside the gas collecting device.

[0054] Preferably, the control device 12 is installed as follows: Figure 2As shown, a non-contact liquid level sensor can be installed on the side wall of the liquid storage device 21 to detect the liquid level and indirectly determine the internal pressure of the liquid-cooled radiator. Alternatively, a pressure sensor can be installed at the bottom of the liquid storage device 21 to detect the weight of the liquid and thus determine the internal pressure of the liquid-cooled radiator. A pressure sensor can be installed in the gas collection device 21 and the inlet section of the gas-liquid pump 1 to detect the gas or hydraulic pressure and thus determine the internal pressure of the liquid-cooled radiator. Alternatively, the internal pressure can be determined by checking whether the probes of resistance, voltage, or capacitance sensors are in contact with the liquid. The controller controls the gas-liquid pump 1 accordingly based on the signals from the sensors.

[0055] In at least one specific embodiment of the present invention, the negative pressure monitoring method of the control device 12 includes the following: when there is only one threshold, a delay device such as a delay switch, a delay module, or a capacitor is also provided. The flowchart of the control device 12 is as follows. Figure 3 As shown, the delay device, after the gas-liquid pump 1 is started, causes the sensor to delay sending the next signal, or the controller to delay receiving the next signal, or delay controlling the gas-liquid pump 1 to stop. Specifically: S11 The sensor detects the gas volume, pressure, cold liquid volume, or liquid level in the gas collection device. If the threshold is not met, a first signal is generated; S12 After the first signal is transmitted to the controller, the controller controls the gas-liquid pump to start accordingly; S13 After the gas-liquid pump starts, the delay device is activated, and the controller delays receiving the next signal, or delays controlling the gas-liquid pump, or the sensor delays sending the next signal; S14 After the delay module stops, the sensor re-detects and sends a signal. If the threshold is still not met, the sensor repeatedly sends the first signal, and the controller receives the signal and controls the gas-liquid pump to continue operating; S15 Until the threshold is met, the sensor sends a second signal, and the controller receives the second signal and controls the gas-liquid pump to stop.

[0056] The automatic control of the gas-liquid pump 1 maintains the negative pressure within the liquid-cooled radiator 2 within a certain range. When multiple threshold values ​​are set, the flowchart of the control device 12 is as follows: Figure 4As shown, the gas-liquid pump 1 starts at a preset power or for a preset duration after the controller receives a signal from the sensor that meets the (n-1)th threshold but not the nth threshold, including the following steps: S21 The sensor detects the gas volume, pressure, cold liquid volume, or liquid level in the gas collection device. If none of these conditions are met, a 0th signal is generated; S22 After transmitting the 0th signal to the controller, the controller controls the gas-liquid pump to operate at a corresponding preset power according to the 0th signal; S23 When the 1st threshold is met but the 2nd threshold is not met, the sensor sends a 1st signal, and the controller controls the gas-liquid pump to operate at a corresponding preset power according to the 1st signal; S24 When the (n-1)th threshold is met but the nth threshold is not met, the sensor sends a (n-1)th signal, and the controller controls the gas-liquid pump to operate at a corresponding preset power according to the (n-1)th signal; S25 When the nth threshold is met, the sensor sends an nth signal, and the gas-liquid pump operates at a corresponding preset power. When the corresponding power is 0, the gas-liquid pump stops. The system enables graded automatic control of the gas-liquid pump 1, and precisely and smoothly controls the negative pressure within the liquid-cooled radiator 2 to remain within a certain range.

[0057] In at least one specific embodiment of the present invention, an alarm device is electrically connected to the gas-liquid pump 1 or the control device 12. The alarm device is equipped with sensors such as capacitance, current, voltage, resistance, and pressure sensors, or delay devices such as delay switches, delay modules, or preset time values. It is also equipped with an alarm device such as a light or a buzzer. The alarm is activated when the sensor detects that the interval between the two most recent starts of the gas-liquid pump is less than the preset time value, or the continuous start time exceeds the preset time value, or the total start time of the gas-liquid pump 1 within a fixed period exceeds the preset time value, or the air pressure inside the liquid-cooled radiator 2 is greater than a certain threshold. Alternatively, the control device 12 controls the alarm to activate when the interval between the two most recent starts of the gas-liquid pump 1 is less than the preset time value, or the continuous start time exceeds the preset time value, or the total start time of the gas-liquid pump 1 within a fixed period exceeds the preset time value, or the air pressure inside the liquid-cooled radiator 2 is greater than the threshold. The preset time value is adjustable and there can be multiple different preset time values.

[0058] In at least one specific embodiment of the present invention, a liquid replenishment device 3 is included. The liquid replenishment device 3 is a sealed container, such as a bottle, can, bag, or piston chamber, made of a leak-proof material such as plastic, glass, rubber, or metal, capable of storing cold liquid. The liquid replenishment device 3 is provided with a liquid outlet, and after the cold liquid 24 is introduced, it is connected in series or parallel to the liquid-cooled radiator 2. Figure 5 As shown.

[0059] In at least one specific embodiment of the present invention, a pressurized fluid one-way flow device 11, such as a pressurized check valve or a pressure relief valve, is provided between the liquid outlet of the liquid replenishment device 3 and the liquid-cooled radiator 2. This ensures that the coolant 24 inside the liquid-cooled radiator 2 can flow into the liquid-cooled radiator 2 only after the pressure of the coolant 24 inside the liquid-cooled radiator 2 is lower than the external atmospheric pressure by a preset value. By setting the pressurized fluid one-way flow device 11, a relatively high negative pressure is maintained inside the liquid-cooled radiator 2, increasing the suction force on the outside air at the break point when the liquid-cooled radiator 2 is damaged, thereby improving safety performance.

[0060] In at least one specific embodiment of the present invention, the liquid outlet of the liquid replenishment device 3 is connected to the liquid cooler 2 via two pipes 4 or via a T-joint connector, such as... Figure 5 As shown in the two figures on the right, the first interface of the three-way connector is connected to the outlet of the liquid replenishment device 3 / liquid cooler 2, and the second and third interfaces are both connected to the liquid cooler 2 / liquid replenishment device 3. Each of the two pipes 4 or the second and third interface pipes is equipped with a counter-current unidirectional fluid conduction device 11, so that it can only conduct in one direction. The unidirectional fluid conduction device 11 located on the path from the liquid replenishment device 3 to the liquid cooler 2 is a pressurized unidirectional fluid conduction device. When the pressure inside the liquid cooler 2 is lower than the pressure inside the liquid replenishment device 3 and reaches a preset pressure difference, it conducts to allow the coolant 24 in the liquid replenishment device 3 to flow into the liquid cooler 2. The unidirectional fluid conduction device 11 located on the path from the liquid cooler 2 to the liquid replenishment device 3 does not have a preset pressure, and its forward opening pressure is less than 5 kPa, so that the coolant 24 in the liquid cooler 2 can flow into the liquid replenishment device 3 through the liquid level difference. By setting a fluid unidirectional flow device 11 in the opposite direction to the pressurized fluid unidirectional flow device 11, when the internal pressure of the liquid-cooled radiator 2 tends to the outside after it is damaged or after the coolant 24 evaporates, the coolant 24 can flow back into the liquid replenishment device 3, thereby improving the overall safety.

[0061] In at least one specific embodiment of the present invention, such as Figure 6 The diagram shows several preferred structures for the housing 100 of the replenishment device 3, including cases where the housing 100 is partially or entirely a deformable portion 110, cases where the housing 100 is partially or entirely a piston 120 and a piston chamber 130, and cases where the deformable portion 110, piston 120, and piston chamber 130 coexist. The diagram shows pairs of the variable-volume chambers after their volume has been increased or decreased.

[0062] In at least one specific embodiment of the present invention, such as Figure 7As a preferred embodiment of the spring 210 or counterweight 220, several structures are used to increase potential energy when the volume of the variable-volume cavity changes. In this case, the spring 210 can be replaced by other devices that increase potential energy with two ends whose relative positions change with the volume of the variable-volume cavity, such as magnetic pairs, springs, air bladders, piston structures, etc. The two ends whose relative positions change are respectively installed on the housing 100 and whose positions change with the volume of the variable-volume cavity. The counterweight 220 can be replaced by other devices with only one mounting end whose position changes with the volume of the variable-volume cavity, such as the moving part body, the weight, or the power device or transmission device. Its mounting point on the housing 100 changes position with the volume of the variable-volume cavity. Through the transmission device such as the cable 230 and the fixed pulley 240, the mounting point does not need to maintain the same direction of movement as the power device or the gravitational potential energy device.

[0063] The fluid replenishment device 3 includes a housing 100, which is partially or entirely a piston 120 and piston chamber 130 structure. The piston 120 and piston chamber 130 structure are sealed and slidably connected. One component is fixed or integrated into the housing 100, and the other is a moving component. The housing 100 is sealed and forms a sealed variable volume cavity 110 through the movement of the moving component. Alternatively, the housing 100 may be a deformable part made of a flexible material such as silicone, rubber, plastic film, or corrugated pipe. The housing 100 is sealed and changes its shape through the deformation of the deformable part. The volume forms a sealed variable-volume cavity 110. After the variable-volume cavity 110 is reduced in volume, it is sealed in parallel at a parallel connection point inside the liquid-cooled radiator 2 through a liquid inlet, or sealed in series at a series connection point inside the liquid-cooled radiator 2 through liquid inlet and outlet ports respectively, so that the variable-volume cavity 110 is sealed and connected to the coolant 24 inside the liquid-cooled radiator 2. At least one of a1, a2, a3, or a4 is satisfied, such that the hydraulic pressure of the coolant 24 in the liquid path from the inlet of the water pump 22 to the parallel or series connection point in the opposite direction of coolant flow inside the liquid-cooled radiator 2 is less than the external atmospheric pressure. The deformable portion described in a1 is made of an elastic material such as silicone or rubber, possessing elasticity greater than the force required for the variable volume cavity 110 to recover at least a portion of its volume after the liquid-cooled radiator 2 is damaged. a2 is provided with a device inside or outside the variable volume cavity that increases potential energy due to the reduction of the volume of the variable volume cavity. The force generated by the device is greater than the force required for the variable volume cavity to recover at least part of its volume after the liquid-cooled radiator 2 is damaged. The variable volume cavity described in a3 is equipped with a power device, such as a motor, pressure pump, or electromagnet, which directly or indirectly applies power to the cavity within the variable volume cavity, causing displacement as the volume changes, either through a transmission device such as a push rod, cable, or pressure transmission device such as a pipeline or piston. The force acting on the cavity causing displacement is greater than the force required for the variable volume cavity to recover at least part of its volume after the liquid-cooled radiator 2 is damaged. a4 The volume to be restored in at least part of the variable volume cavity is located below the elevation of all the cold liquids in the liquid passage section where the internal cold liquid pressure needs to be lower than the external atmospheric pressure through the negative pressure structure. The variable volume cavity contains cold liquid, and the variable volume cavity can be restored to at least part of its volume by the gravity of the cold liquid in the variable volume cavity after a break is created in the liquid passage section where the internal cold liquid pressure needs to be lower than the external atmospheric pressure through the negative pressure structure.

[0064] In at least one specific embodiment of the present invention, the device for increasing potential energy includes a device for elastic potential energy, such as a spring or a sheet spring. In the device, one end of each end whose relative position changes is mounted on a housing, and the other end is mounted on a deformable portion or another housing sealed together through a deformable portion. One end of the device is mounted on a housing or a fixed component, and the other end is mounted on a moving component. The device for increasing potential energy also includes a device for pressure potential energy, such as a bladder or a piston structure. In the device, one end of each end whose relative position changes is mounted on a housing, and the other end is mounted on a deformable portion or another housing sealed together through a deformable portion. The device for increasing potential energy includes a magnetic potential energy device such as a magnet pair or a magnet and a magnetized object such as iron, cobalt, or nickel, wherein one end of the device is mounted on the housing or a fixed part and the other end is mounted on a deformable part or another housing sealed together through the deformable part. The device also includes a gravitational potential energy device such as a counterweight or a weight. The device is directly or indirectly connected to the deformable part or the moving part through a force transmission mechanism such as a lever, a fixed pulley, or a rope.

[0065] In at least one specific embodiment of the present invention, the outer shell of the housing is provided with at least a frame or outer shell to reserve space to accommodate the housing after the volume is increased, thereby protecting the function of the liquid replenishment device.

[0066] In at least one specific embodiment of the present invention, when the liquid replenishment device is connected in parallel to an external liquid path through a liquid inlet, the negative pressure structure is connected in parallel to the external liquid path through a guide multi-port, such as... Figure 8As shown, the guide multi-channel includes at least a first port 710 sealingly connecting the internal first liquid passage to the external liquid passage inlet, a second port 720 sealingly connecting the internal second liquid passage to the external liquid passage outlet, and a third port 730 sealingly connecting the internal third liquid passage to the variable volume cavity or sealed cavity within the negative pressure structure. The internal first liquid passage, internal second liquid passage, and internal third liquid passage are located inside the guide multi-channel and are interconnected. When the cold liquid flows from the internal second liquid passage to the internal first liquid passage or from the internal first liquid passage to the internal second liquid passage, the turning angle is greater than 90 degrees. When the cold liquid flows from the internal third liquid passage to the internal second liquid passage or from the internal second liquid passage to the internal third liquid passage, the turning angle is less than 90 degrees. That is, when the cold liquid flows in from the internal first liquid passage or the internal second liquid passage, it preferentially flows out from the internal third liquid passage. By setting up the guide multi-channel, the cold liquid pumped out by the water pump preferentially enters the replenishment device, further maintaining the negative pressure between the outlet of the replenishment device and the inlet of the water pump.

[0067] In at least one specific embodiment of the present invention, the liquid replenishment device 3 includes a housing 100, which is sealed to form a sealed cavity. The sealed cavity is provided with at least one vent that is sealed to the external atmospheric pressure. The liquid level in the sealed cavity is always lower than the vent. The sealed cavity is connected to the liquid cooler 2 in parallel through a liquid port. The liquid port or the pipe sealed to the liquid port is immersed in the cold liquid 24 at the inner end of the sealed cavity. Alternatively, the sealed cavity is connected to the liquid cooler 2 in series through an inlet and an outlet. The outlet or the pipe sealed to the outlet is immersed in the cold liquid 24 at the inner end of the sealed cavity.

[0068] In at least one specific embodiment of the present invention, the liquid replenishment device 3 includes a liquid storage heat dissipation blanket. The liquid storage heat dissipation blanket is made of a liquid-resistant soft film such as rubber, silicone, polyethylene, polypropylene, aluminum film, etc., and is bag-shaped. The bag opening is sealed to form a sealed bag. The inlet and outlet pipes are connected in series in the liquid-cooled radiator. The sealed bag is laid flat on the heat transfer surface such as the ground, table, or wall. The inside contains cold liquid. By contacting the heat transfer surface with a large area, the purpose of eliminating the need for fan heat dissipation is achieved. The flat area of ​​the heat dissipation blanket is greater than 0.2 square meters.

[0069] By adopting the above solution, the coolant inside the liquid-cooled radiator is kept under negative pressure to prevent coolant leakage from the liquid cooling system. A liquid replenishment device prevents localized high pressure within the liquid-cooled radiator from disrupting the negative pressure environment, and a pressurized fluid one-way conduction device prevents excessively low overall negative pressure from causing coolant boiling. An alarm device is also provided to alert users when the negative pressure environment fails.

[0070] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make other modifications to the technical solution of the present invention or make equivalent substitutions for some of the technical features, or split or merge some of them. Any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the technical solution of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A negative pressure structure, characterized in that: The system includes a manual air extraction device or a gas-liquid pump. The inlet of the manual air extraction device or gas-liquid pump is connected to the gas inside the gas collection device through a first outlet located above the liquid surface, forming a first passage. Gas or liquid in the first passage is pumped out of the gas collection device by the gas-liquid pump. The gas collection device is a container made of a leak-proof material or metal, capable of storing solution without leakage. It has a second inlet and a third outlet connected in series into the liquid circuit of the liquid-cooled radiator. The third outlet is located below the liquid surface. When the coolant in the liquid-cooled radiator flows through the gas collection device, air bubbles in the coolant rise and concentrate at the upper end of the gas collection device. The gas collection device can be connected in series as a separate component into the original liquid-cooled radiator or combined with an existing liquid storage device or container with liquid storage function in the original liquid-cooled radiator. A first outlet is added above the liquid surface in the container and connected to the inlet of the manual air extraction device or gas-liquid pump, so that the container replaces the gas collection device, forming the first passage. The device includes a liquid replenishment unit, which is a sealed container made of a leak-proof material and has a liquid outlet. It is connected in series or parallel within the liquid-cooled radiator. The liquid replenishment device outlet is connected to the liquid cooler via two pipes or a T-joint. The first port of the T-joint connects to the liquid replenishment device outlet / liquid cooler, and the second and third ports connect to the liquid cooler / liquid replenishment device. Each of the two pipes or the second and third port pipes is equipped with a counter-current unidirectional fluid conduction device, ensuring that each can only conduct in one direction. The unidirectional fluid conduction device on the path from the liquid replenishment device to the liquid cooler is a pressurized unidirectional fluid conduction device. When the pressure inside the liquid cooler is lower than the pressure of the liquid replenishment device and a preset pressure difference is reached, the device opens to allow the coolant in the liquid replenishment device to flow into the liquid cooler. The unidirectional fluid conduction device on the path from the liquid cooler to the liquid replenishment device does not have a preset pressure; its forward opening pressure is less than 5 kPa, allowing the coolant in the liquid cooler to flow into the liquid replenishment device simply by changing the liquid level.

2. A negative pressure structure, characterized in that: The system includes a manual evacuation device or a gas-liquid pump. The inlet of the manual evacuation device or gas-liquid pump is connected to the gas inside the gas collecting device through a first outlet located above the liquid surface, forming a first passage. Gas or liquid in the first passage is pumped out of the gas collecting device by the gas-liquid pump. The gas collecting device is a container made of a leak-proof material or metal, capable of storing solution without leakage. It has a second inlet and a third outlet connected in series into the liquid circuit of the liquid-cooled radiator. The third outlet is located below the liquid surface. When the coolant in the liquid-cooled radiator flows through the gas collecting device, air bubbles in the coolant rise and collect at the upper end of the gas collecting device. The gas collecting device is connected in series as a separate component into the original liquid-cooled radiator or connected to an existing liquid storage device or device with liquid storage function in the original liquid-cooled radiator. The containers are combined, and a first outlet is added above the liquid level in the container and connected to the manual evacuation device or the inlet of the gas-liquid pump so that the container replaces the gas collecting device, forming a first passage. A fourth inlet is provided on the gas collecting device or container or on the first passage to connect the outside world with the gas pressure inside the gas collecting device or container. The fourth inlet is equipped with a pressurized fluid unidirectional flow device. The pressurized fluid unidirectional flow device allows outside gas to enter the gas collecting device unidirectionally after the pressure inside the gas collecting device or container is too low, that is, when the pressure difference between the inside and outside of the gas collecting device is greater than the opening pressure of the pressurized fluid unidirectional flow device. This controls the negative pressure inside the liquid-cooled radiator to be within a preset range, preventing the liquid in the liquid-cooled radiator from boiling due to excessively low boiling point caused by excessively low negative pressure.

Images