CN114051356B - Negative pressure liquid cooling system - Google Patents
Negative pressure liquid cooling system Download PDFInfo
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- CN114051356B CN114051356B CN202111160609.1A CN202111160609A CN114051356B CN 114051356 B CN114051356 B CN 114051356B CN 202111160609 A CN202111160609 A CN 202111160609A CN 114051356 B CN114051356 B CN 114051356B
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- 239000007788 liquid Substances 0.000 title claims abstract description 311
- 238000001816 cooling Methods 0.000 title claims abstract description 81
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 230000017525 heat dissipation Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to the technical field of chip cooling, in particular to a negative pressure liquid cooling system. The negative pressure liquid cooling system includes first liquid reserve tank, second liquid reserve tank, vacuum pump, heat exchanger and cold plate, and the negative pressure liquid cooling system has: the first air inlet is used for air inlet, the second air outlet is used for air outlet, the first liquid outlet is used for liquid outlet, and the second liquid inlet is used for liquid inlet; and the second air inlet is used for air inlet, the first air outlet is used for air outlet, the second liquid outlet is used for liquid outlet, and the first liquid inlet is used for liquid inlet; the negative pressure liquid cooling system is suitable for being circularly switched between a first state and a second state. The negative pressure liquid cooling system provided by the invention can realize the flowing circulation of the cooling liquid without a water pump, reduces parts such as the water pump, reduces the cost and also reduces the control difficulty of the negative pressure liquid cooling system.
Description
Technical Field
The invention relates to the technical field of chip cooling, in particular to a negative pressure liquid cooling system.
Background
In recent years, with the improvement of the integration level of electronic components, the power of a chip is higher and higher, and the heat dissipation requirement of the chip is higher and higher, so that the heat dissipation problem of a high-power and high-heat-flux chip is difficult to solve by the traditional air cooling heat dissipation mode.
The liquid cooling heat dissipation mode can solve the heat dissipation problem of the high-power and high-heat-flux chips, and is widely applied to cooling of high-power electronic equipment. The traditional liquid cooling system is a positive pressure liquid cooling system, namely, the liquid pressure in the pipeline is greater than the ambient pressure outside the pipeline, and when the pipeline is perforated due to corrosion or other reasons, the liquid in the pipeline can leak onto the electronic components from the perforation, so that the electronic components are damaged.
The negative pressure liquid cooling system can not have the problem of leakage of cooling liquid because the internal pressure of the liquid is lower than the atmospheric pressure. The existing negative pressure liquid cooling system and the control method thereof comprise a heat exchanger, a one-way valve, a cooling plate and a water tank which are sequentially connected, wherein an outlet of the water tank is communicated with an inlet of the heat exchanger, cooling liquid circulates among the heat exchanger, the cooling plate and the water tank under the action of a liquid pump, and the water tank is also connected with a vacuum pump which is used for adjusting the pressure of the outlet of the cooling plate. The negative pressure liquid cooling system needs the vacuum pump and the water pump to work simultaneously to maintain the normal operation of the system, and has higher requirements on the reliability of the vacuum pump and the water pump, and higher cost and control difficulty of the system.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the vacuum pump and the water pump are required to work simultaneously to maintain the normal operation of the system and the cost and the control difficulty of the system are high in the prior art, thereby providing the negative pressure liquid cooling system with low cost and low control difficulty.
In order to solve the problems, the invention provides a negative pressure liquid cooling system, which comprises a first liquid storage tank, a second liquid storage tank, a vacuum pump, a heat exchanger and a cold plate, wherein the first liquid storage tank comprises a first air inlet, a first air outlet, a first liquid inlet and a first liquid outlet; the second liquid storage tank comprises a second air inlet, a second air outlet, a second liquid inlet and a second liquid outlet; the vacuum pump comprises an air inlet and an air outlet, the air inlet is communicated with the first air outlet and the second air outlet, and the air outlet is communicated with the first air inlet and the second air inlet; the heat exchanger comprises a liquid inlet and a liquid outlet, and the liquid inlet is communicated with the first liquid outlet and the second liquid outlet; the cold plate comprises a liquid inlet and a liquid outlet, the liquid inlet is communicated with the liquid outlet, and the liquid outlet is communicated with the first liquid inlet and the second liquid inlet; wherein, negative pressure liquid cooling system has: the first air inlet is used for air inlet, the second air outlet is used for air outlet, the first liquid outlet is used for liquid outlet, and the second liquid inlet is used for liquid inlet; and the second air inlet is used for air inlet, the first air outlet is used for air outlet, the second liquid outlet is used for liquid outlet, and the first liquid inlet is used for liquid inlet; the negative pressure liquid cooling system is suitable for being circularly switched between a first state and a second state.
The negative pressure liquid cooling system provided by the invention further comprises an adjusting structure which is arranged on an upstream pipeline of the liquid inlet and is suitable for adjusting the hydraulic pressure at the liquid inlet to be lower than the atmospheric pressure.
The invention provides a negative pressure liquid cooling system, wherein an adjusting structure comprises a pressure gauge and an electromagnetic adjusting valve; the pressure gauge is arranged on a connecting pipeline between the liquid outlet and the liquid inlet and is suitable for measuring the hydraulic pressure; the electromagnetic regulating valve is in communication connection with the pressure gauge and is suitable for regulating the opening degree of the electromagnetic regulating valve according to the measurement result of the pressure gauge.
The negative pressure liquid cooling system provided by the invention is characterized in that a bubble detection structure is arranged on a downstream pipeline of a liquid outlet, the negative pressure liquid cooling system is suitable for having a third state when the bubble detection structure detects bubbles, in the third state, both the first air outlet and the second air outlet are used for air outlet, and both the first liquid inlet and the second liquid inlet are used for liquid inlet.
The negative pressure liquid cooling system provided by the invention further comprises an electromagnetic emptying valve and an emptying pipe, wherein one end of the emptying pipe is communicated with an exhaust port of the vacuum pump, and the other end of the emptying pipe is communicated to the atmosphere; the electromagnetic exhaust valve is arranged on the exhaust pipe and is suitable for being opened when the negative pressure liquid cooling system is in a third state.
The negative pressure liquid cooling system provided by the invention further comprises a first switching structure, a second switching structure, a third switching structure and a fourth switching structure, wherein the first switching structure is arranged on a downstream pipeline of a liquid outlet and is suitable for controlling the opening and closing of a first liquid inlet and a second liquid inlet; the second switching structure is arranged on an upstream pipeline of the liquid inlet and is suitable for controlling the opening and closing of the first liquid outlet and the second liquid outlet; the third switching structure is arranged on a downstream pipeline of the exhaust port and is suitable for controlling the opening and closing of the first air inlet and the second air inlet; the fourth switching structure is arranged on an upstream pipeline of the air inlet and is suitable for controlling the opening and closing of the first air outlet and the second air outlet.
The invention provides a negative pressure liquid cooling system, wherein a first switching structure comprises a first electromagnetic valve and a second electromagnetic valve, and the first electromagnetic valve is arranged on a connecting pipeline of a liquid outlet and a first liquid inlet; the second electromagnetic valve is arranged on a connecting pipeline of the liquid outlet and the second liquid inlet.
The invention provides a negative pressure liquid cooling system, a second switching structure comprises a third electromagnetic valve and a fourth electromagnetic valve, wherein the third electromagnetic valve is arranged on a connecting pipeline of a liquid inlet and a first liquid outlet; the fourth electromagnetic valve is arranged on a connecting pipeline of the liquid inlet and the second liquid outlet.
The third switching structure comprises a fifth electromagnetic valve and a sixth electromagnetic valve, wherein the fifth electromagnetic valve is arranged on a connecting pipeline of an exhaust port and a first air inlet; the sixth electromagnetic valve is arranged on a connecting pipeline of the exhaust port and the second air inlet.
The invention provides a negative pressure liquid cooling system, a fourth switching structure comprises a seventh electromagnetic valve and an eighth electromagnetic valve; the seventh electromagnetic valve is arranged on a connecting pipeline of the air inlet and the first air outlet; the eighth electromagnetic valve is arranged on the connecting pipeline of the air inlet and the second air outlet.
The invention has the following advantages:
1. the negative pressure liquid cooling system provided by the invention comprises the first liquid storage tank, the second liquid storage tank, the vacuum pump, the heat exchanger and the cold plate, wherein the first liquid storage tank and the second liquid storage tank are alternately switched between low pressure and high pressure under the action of the vacuum pump to provide power for the circulation of cooling liquid in the negative pressure liquid cooling system, the flowing circulation of the cooling liquid can be realized without a water pump, the parts such as the water pump and the like are reduced, the cost is reduced, and the control difficulty of the negative pressure liquid cooling system is also reduced; meanwhile, in the negative pressure liquid cooling system provided by the invention, the vacuum pump not only provides negative pressure for the cooling liquid, but also provides power for the cooling liquid in the negative pressure liquid cooling system, and the functions can be realized without modifying the structure and control of the vacuum pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a negative pressure liquid cooling system of the present invention in a first state;
FIG. 2 is a schematic diagram of the negative pressure liquid cooling system of the present invention in a second state;
fig. 3 shows a schematic diagram of the negative pressure liquid cooling system of the present invention in a third state.
Reference numerals illustrate:
1. a first reservoir; 101. a first air inlet; 102. a first air outlet; 103. a first liquid inlet; 104. a first liquid outlet; 2. a second liquid storage tank; 201. a second air inlet; 202. a second air outlet; 203. a second liquid inlet; 204. a second liquid outlet; 3. a vacuum pump; 301. an air inlet; 302. an exhaust port; 4. a heat exchanger; 401. a liquid inlet; 402. a liquid outlet; 5. a cold plate; 501. a liquid inlet; 502. a liquid outlet; 6. an adjustment structure; 601. a pressure gauge; 602. an electromagnetic regulating valve; 7. a bubble detection structure; 8. an electromagnetic evacuation valve; 9. an evacuation tube; 10. a first electromagnetic valve; 11. a second electromagnetic valve; 12. a third electromagnetic valve; 13. a fourth electromagnetic valve; 14. a fifth electromagnetic valve; 15. a sixth electromagnetic valve; 16. a seventh electromagnetic valve; 17. an eighth electromagnetic valve; 18. a flow meter.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 2, in the present embodiment, a negative pressure liquid cooling system is disclosed, which includes a first liquid storage tank 1, a second liquid storage tank 2, a vacuum pump 3, a heat exchanger 4, a cold plate 5, and a controller, which are not shown in the drawings, the first liquid storage tank 1 includes a first air inlet 101, a first air outlet 102, a first liquid inlet 103, and a first liquid outlet 104; the second liquid storage tank 2 comprises a second air inlet 201, a second air outlet 202, a second liquid inlet 203 and a second liquid outlet 204; the vacuum pump 3 comprises an air inlet 301 and an air outlet 302, wherein the air inlet 301 is communicated with the first air outlet 102 and the second air outlet 202, and the air outlet 302 is communicated with the first air inlet 101 and the second air inlet 201; the heat exchanger 4 comprises a liquid inlet 401 and a liquid outlet 402, wherein the liquid inlet 401 is communicated with the first liquid outlet 104 and the second liquid outlet 204; the cold plate 5 comprises a liquid inlet 501 and a liquid outlet 502, the liquid inlet 501 is communicated with the liquid outlet 402, and the liquid outlet 502 is communicated with the first liquid inlet 103 and the second liquid inlet 203; wherein, negative pressure liquid cooling system has: the first state that the first air inlet 101 is in air, the second air outlet 202 is out of air, the first liquid outlet 104 is out of liquid, and the second liquid inlet 203 is in liquid; and a second state in which the second air inlet 201 is in air, the first air outlet 102 is out air, the second liquid outlet 204 is out of liquid, and the first liquid inlet 103 is in liquid; the negative pressure liquid cooling system is suitable for being circularly switched between a first state and a second state. The negative pressure liquid cooling system of this embodiment further includes a flow meter 18 disposed on the upstream line of the liquid inlet.
The negative pressure liquid cooling system provided by the embodiment comprises the first liquid storage tank 1, the second liquid storage tank 2, the vacuum pump 3, the heat exchanger 4 and the cold plate 5, wherein the first liquid storage tank 1 and the second liquid storage tank 2 are alternately switched between low pressure and high pressure under the action of the vacuum pump 3 to provide power for the circulation of cooling liquid in the negative pressure liquid cooling system, the flowing circulation of the cooling liquid can be realized without a water pump, the parts such as the water pump and the like are reduced, the cost is reduced, and the control difficulty of the negative pressure liquid cooling system is also reduced; meanwhile, in the negative pressure liquid cooling system provided by the invention, the vacuum pump 3 not only provides negative pressure for the cooling liquid, but also provides power for the cooling liquid in the negative pressure liquid cooling system, and the functions can be realized without modifying the structure and control of the vacuum pump 3. The first liquid storage tank 1 and the second liquid storage tank 2 are used for adjusting the pressure of cooling liquid through the vacuum pump 3, the pressure of the cooling liquid is lower than the atmospheric pressure of the external environment, the cooling liquid is in a negative pressure state, the problem of cooling liquid leakage can not occur, and the heat dissipation problem of a high-power and high-heat-flux chip can be solved.
In a specific embodiment, the negative pressure liquid cooling system in this embodiment further includes a liquid level detection structure for detecting the liquid levels in the first liquid storage tank 1 and the second liquid storage tank 2. When the liquid level in the second liquid storage tank 2 reaches a liquid level threshold value, the negative pressure liquid cooling system is switched from the first state to the second state; when the liquid level in the first liquid storage tank 1 reaches a liquid level threshold value, the negative pressure liquid cooling system is switched from the second state to the first state. The cooling liquid may be deionized water.
In a preferred embodiment, the first air inlet 101 and the first air outlet 102 are both disposed at the top of the first liquid storage tank 1, and the first liquid inlet 103 and the first liquid outlet 104 are both disposed at the bottom of the first liquid storage tank 1, so as to facilitate the discharge of the cooling liquid and prevent the overflow of the cooling liquid through the first air inlet 101 and the first air outlet 102.
In a specific embodiment, the vacuum pump 3 is a water ring vacuum pump 3. Preferably, the vacuum pump 3 can adjust the rotation speed by PID, and the control result is accurate by controlling the rotation speed to control the operation state of the components, so that the problem that the vacuum pump 3 is difficult to start at low pressure during voltage adjustment can be prevented.
In the specific embodiment, the heat exchanger 4 is a condenser adopting an air-cooled heat radiation mode. The cold plate 5 may have at least one, and when there are more than two cold plates 5, the more than two cold plates 5 are connected in series or in parallel, so that heat dissipation can be performed on a large-scale electronic device or a plurality of electronic devices simultaneously.
The negative pressure liquid cooling system of this embodiment further includes an adjusting structure 6, disposed on the upstream line of the liquid inlet 401, adapted to adjust the liquid pressure at the liquid inlet 501 to be lower than the atmospheric pressure. The adjusting structure 6 is matched with the vacuum pump 3, the hydraulic pressure of the liquid inlet 501 is adjusted, no coolant overflows from the cold plate 5, and the electronic device is prevented from being damaged by the overflowed coolant.
In this embodiment, the adjusting structure 6 includes a pressure gauge 601 and an electromagnetic adjusting valve 602, where the pressure gauge 601 is disposed on a connecting line between the liquid outlet 402 and the liquid inlet 501, and is adapted to measure the hydraulic pressure; the electromagnetic regulating valve 602 is communicatively connected to the pressure gauge 601, and is adapted to regulate the opening degree of the electromagnetic regulating valve 602 according to the measurement result of the pressure gauge 601. When the hydraulic pressure measured by the pressure gauge 601 is greater than the atmospheric pressure, the opening degree of the electromagnetic regulating valve 602 is reduced, the flow resistance of the system is increased, and the hydraulic pressure of the cooling liquid entering the cold plate 5 is maintained in a negative pressure state lower than the atmospheric pressure. The communication connection comprises wired connection through connecting wires and network connection through 2G, 3G, 4G, 5G, WIFI and the like. The pressure gauge 601 and the solenoid valve 602 are both in communication with the controller.
As shown in fig. 3, in this embodiment, a bubble detecting structure 7 is disposed on a downstream pipeline of the liquid outlet 502, and the negative pressure liquid cooling system is adapted to have a third state when the bubble detecting structure 7 detects a bubble, in the third state, both the first air outlet 102 and the second air outlet 202 are air-out, and both the first liquid inlet 103 and the second liquid inlet 203 are liquid-in. When the bubble detection structure 7 detects bubbles, the negative pressure liquid cooling system is indicated to be damaged, and the negative pressure liquid cooling system should be stopped at the moment, cooling liquid is recovered to the first liquid storage tank 1 and the second liquid storage tank 2, the damage to electronic devices caused by leakage of the cooling liquid is prevented, and the damaged part is checked and repaired. In a preferred embodiment, when the negative pressure liquid cooling system is in the third state, the first liquid outlet 104 can also feed liquid into the first liquid storage tank 1, and the second liquid outlet 204 can also feed liquid into the second liquid storage tank 2, so as to increase the recovery speed of the cooling liquid. The negative pressure liquid cooling system can also be used for recovering the cooling liquid in the third state when the cooling liquid is replaced or transported. The bubble detection structure 7 is in communication with the controller.
The negative pressure liquid cooling system of the embodiment further comprises an electromagnetic emptying valve 8 and an emptying pipe 9, wherein one end of the emptying pipe 9 is communicated with the exhaust port 302 of the vacuum pump 3, and the other end of the emptying pipe is communicated to the atmosphere; an electromagnetic evacuation valve 8 is provided on the evacuation pipe 9 and adapted to open when the negative pressure liquid cooling system is in the third state, and to evacuate the gases in the first tank 1 and the second tank 2 to the outside environment. The electromagnetic evacuation valve 8 is in communication with the controller.
In a preferred embodiment, the sum of the volume of the first liquid storage tank 1 and the volume of the second liquid storage tank 2 is larger than the content of the cooling liquid in the negative pressure liquid cooling system.
As shown in fig. 1 to 3, the negative pressure liquid cooling system of the present embodiment further includes a first switching structure, a second switching structure, a third switching structure, and a fourth switching structure, where the first switching structure is disposed on a downstream pipeline of the liquid outlet 502 and is adapted to control opening and closing of the first liquid inlet 103 and the second liquid inlet 203; the second switching structure is arranged on the upstream pipeline of the liquid inlet 401 and is suitable for controlling the opening and closing of the first liquid outlet 104 and the second liquid outlet 204; the third switching structure is arranged on the downstream pipeline of the exhaust port 302 and is suitable for controlling the opening and closing of the first air inlet 101 and the second air inlet 201; the fourth switching structure is disposed on the upstream pipeline of the air inlet 301, and is adapted to control the opening and closing of the first air outlet 102 and the second air outlet 202.
In this embodiment, the first switching structure includes a first electromagnetic valve 10 and a second electromagnetic valve 11, where the first electromagnetic valve 10 is disposed on a connection pipeline between the liquid outlet 502 and the first liquid inlet 103; the second electromagnetic valve 11 is provided on a connection line between the drain port 502 and the second inlet port 203. The first solenoid valve 10 and the second solenoid valve 11 are both in communication with a controller.
As an alternative embodiment, the first switching structure may be an electromagnetic three-way valve, and may be in communication with the drain port 502, the first liquid inlet 103, and the second liquid inlet 203, respectively.
In this embodiment, the second switching structure includes a third electromagnetic valve 12 and a fourth electromagnetic valve 13, and the third electromagnetic valve 12 is disposed on a connection pipeline between the liquid inlet 401 and the first liquid outlet 104; the fourth electromagnetic valve 13 is disposed on a connection line between the liquid inlet 401 and the second liquid outlet 204. The third solenoid valve 12 and the fourth solenoid valve 13 are both in communication with the controller.
As an alternative embodiment, the second switching structure may be an electromagnetic three-way valve, and may be respectively communicated with the liquid inlet 401, the first liquid outlet 104, and the second liquid outlet 204.
In the present embodiment, the third switching structure includes a fifth electromagnetic valve 14 and a sixth electromagnetic valve 15, the fifth electromagnetic valve 14 is disposed on a connection line between the exhaust port 302 and the first air inlet 101; the sixth electromagnetic valve 15 is provided on a connection line between the exhaust port 302 and the second intake port 201. The fifth solenoid valve 14 and the sixth solenoid valve 15 are both communicatively connected to the controller.
As an alternative embodiment, the third switching structure may be an electromagnetic three-way valve, and may be in communication with the exhaust port 302, the first intake port 101, and the second intake port 201, respectively.
In the present embodiment, the fourth switching structure includes the seventh solenoid valve 16 and the eighth solenoid valve 17; the seventh electromagnetic valve 16 is arranged on a connecting pipeline between the air inlet 301 and the first air outlet 102; the eighth electromagnetic valve 17 is disposed on a connection line between the air inlet 301 and the second air outlet 202.
As an alternative embodiment, the fourth switching structure may be an electromagnetic three-way valve, which communicates with the air inlet 301, the first air outlet 102, and the second air outlet 202, respectively.
In a preferred embodiment, all connecting pipelines of the negative pressure liquid cooling system are transparent pipelines capable of bearing negative pressure, and bubbles in the pipelines can be directly observed.
The operation process of the negative pressure liquid cooling system of the embodiment includes a first state, a second state and a third state. In the first state, when the liquid level threshold of the cooling liquid in the first liquid storage tank 1 is reached, the second electromagnetic valve 11, the third electromagnetic valve 12, the fifth electromagnetic valve 14, the eighth electromagnetic valve 17 and the electromagnetic regulating valve 602 are opened, the vacuum pump 3 is started, the first air inlet 101 is used for air intake, the second air outlet 202 is used for air exhaust, the first liquid outlet 104 is used for liquid exhaust, the cooling liquid passes through the electromagnetic regulating valve 602, the heat exchanger 4 and the cold plate 5 from the first liquid storage tank 1 and then enters the second liquid storage tank 2 through the second liquid inlet 203, and the state is switched to the second state until the liquid level threshold of the cooling liquid in the second liquid storage tank 2 is reached; in the second state, when the liquid level threshold value of the cooling liquid in the second liquid storage tank 2 is reached, the first electromagnetic valve 10, the fourth electromagnetic valve 13, the seventh electromagnetic valve 16, the sixth electromagnetic valve 15 and the electromagnetic regulating valve 602 are opened, the vacuum pump 3 is started, the second air inlet 201 is used for air inlet, the first air outlet 102 is used for air outlet, the second liquid outlet 204 is used for liquid outlet, and the cooling liquid enters the first liquid storage tank 1 from the second liquid storage tank 2 through the electromagnetic regulating valve 602, the heat exchanger 4 and the cold plate 5 through the first liquid inlet 103 until the liquid level threshold value of the cooling liquid in the first liquid storage tank 1 is reached, and then the state is switched to the first state. In the third state, the first electromagnetic valve 10, the second electromagnetic valve 11, the third electromagnetic valve 12, the fourth electromagnetic valve 13, the seventh electromagnetic valve 16, the eighth electromagnetic valve 17, the electromagnetic regulating valve 602 and the electromagnetic emptying valve 8 are all opened, the vacuum pump 3 is started, the first air outlet 102 and the second air outlet 202 are exhausted, and the air is exhausted to the external environment through the air exhaust port 302; the cooling liquid is partially recycled into the first liquid storage tank 1 through the first liquid inlet 103 and the first liquid outlet 104, and partially recycled into the second liquid storage tank 2 through the second liquid inlet 203 and the second liquid outlet 204, and if the first liquid storage tank 1 and/or the second liquid storage tank 2 reach a liquid level threshold value, the corresponding electromagnetic valve is closed.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. A negative pressure liquid cooling system, comprising:
the first liquid storage tank (1) comprises a first air inlet (101), a first air outlet (102), a first liquid inlet (103) and a first liquid outlet (104);
the second liquid storage tank (2) comprises a second air inlet (201), a second air outlet (202), a second liquid inlet (203) and a second liquid outlet (204);
the vacuum pump (3) comprises an air inlet (301) and an air outlet (302), wherein the air inlet (301) is communicated with the first air outlet (102) and the second air outlet (202), and the air outlet (302) is communicated with the first air inlet (101) and the second air inlet (201);
the heat exchanger (4) comprises a liquid inlet (401) and a liquid outlet (402), and the liquid inlet (401) is communicated with the first liquid outlet (104) and the second liquid outlet (204);
the cold plate (5) comprises a liquid inlet (501) and a liquid outlet (502), wherein the liquid inlet (501) is communicated with the liquid outlet (402), and the liquid outlet (502) is communicated with the first liquid inlet (103) and the second liquid inlet (203);
wherein the negative pressure liquid cooling system comprises: the first air inlet (101) is used for air inlet, the second air outlet (202) is used for air outlet, the first liquid outlet (104) is used for liquid outlet, and the second liquid inlet (203) is used for liquid inlet in a first state; the second air inlet (201) is used for air inlet, the first air outlet (102) is used for air outlet, the second liquid outlet (204) is used for liquid outlet, and the first liquid inlet (103) is used for liquid inlet in a second state; the negative pressure liquid cooling system is suitable for being circularly switched between the first state and the second state;
a bubble detection structure (7) is arranged on a downstream pipeline of the liquid outlet (502), the negative pressure liquid cooling system is suitable for having a third state when the bubble detection structure (7) detects bubbles, in the third state, the first air outlet (102) and the second air outlet (202) are both air-out, and the first liquid inlet (103) and the second liquid inlet (203) are both liquid-in;
an electromagnetic emptying valve (8) and an emptying pipe (9), wherein one end of the emptying pipe (9) is communicated with an exhaust port (302) of the vacuum pump (3), and the other end of the emptying pipe is communicated to the atmosphere; the electromagnetic emptying valve (8) is arranged on the emptying pipe (9) and is suitable for being opened when the negative pressure liquid cooling system is in the third state;
all connecting pipelines of the negative pressure liquid cooling system are transparent pipelines.
2. Negative pressure liquid cooling system according to claim 1, further comprising an adjustment structure (6) arranged on the upstream line of the liquid inlet (401) adapted to adjust the liquid pressure at the liquid inlet (501) to below atmospheric pressure.
3. Negative pressure liquid cooling system according to claim 2, characterized in that the adjusting structure (6) comprises:
a pressure gauge (601) arranged on a connecting line between the liquid outlet (402) and the liquid inlet (501) and adapted to measure a hydraulic pressure;
and an electromagnetic regulating valve (602) which is in communication connection with the pressure gauge (601) and is suitable for regulating the opening degree of the electromagnetic regulating valve (602) according to the measurement result of the pressure gauge (601).
4. A negative pressure liquid cooling system according to any one of claims 1-3, further comprising:
a first switching structure, which is arranged on a downstream pipeline of the liquid outlet (502) and is suitable for controlling the opening and closing of the first liquid inlet (103) and the second liquid inlet (203);
a second switching structure, which is arranged on an upstream pipeline of the liquid inlet (401) and is suitable for controlling the opening and closing of the first liquid outlet (104) and the second liquid outlet (204);
a third switching structure provided on a downstream line of the exhaust port (302) and adapted to control opening and closing of the first intake port (101) and the second intake port (201);
and a fourth switching structure, which is arranged on the upstream pipeline of the air inlet (301) and is suitable for controlling the opening and closing of the first air outlet (102) and the second air outlet (202).
5. The negative pressure liquid cooling system of claim 4, wherein the first switching structure comprises:
the first electromagnetic valve (10) is arranged on a connecting pipeline of the liquid outlet (502) and the first liquid inlet (103);
the second electromagnetic valve (11) is arranged on a connecting pipeline of the liquid outlet (502) and the second liquid inlet (203).
6. The negative pressure liquid cooling system of claim 4, wherein the second switching structure comprises:
a third electromagnetic valve (12) arranged on a connecting pipeline between the liquid inlet (401) and the first liquid outlet (104);
and the fourth electromagnetic valve (13) is arranged on a connecting pipeline of the liquid inlet (401) and the second liquid outlet (204).
7. The negative pressure liquid cooling system according to claim 4, wherein the third switching structure includes:
a fifth electromagnetic valve (14) provided on a connection line between the exhaust port (302) and the first intake port (101);
and a sixth electromagnetic valve (15) provided on a connection line between the exhaust port (302) and the second intake port (201).
8. The negative pressure liquid cooling system according to claim 4, wherein the fourth switching structure includes:
a seventh electromagnetic valve (16) arranged on a connecting pipeline between the air inlet (301) and the first air outlet (102);
the eighth electromagnetic valve (17) is arranged on a connecting pipeline of the air inlet (301) and the second air outlet (202).
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| CN114364238B (en) * | 2022-03-18 | 2022-06-17 | 苏州浪潮智能科技有限公司 | Stable switching negative pressure liquid cooling system and stable switching negative pressure liquid cooling control method |
| CN116723685B (en) * | 2023-08-08 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Liquid cooling heat dissipation system |
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| US9010141B2 (en) * | 2010-04-19 | 2015-04-21 | Chilldyne, Inc. | Computer cooling system and method of use |
| US11317535B2 (en) * | 2012-02-07 | 2022-04-26 | Chilldyne, Inc. | Computer cooling system and method of use |
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