Liquid cooling system pipeline exhaust structure and liquid cooling system

Abstract

The invention provides a liquid cooling system pipeline exhaust structure and a liquid cooling system. The liquid cooling system pipeline exhaust structure comprises a first conveying pipe, a second conveying pipe, a third conveying pipe and an exhaust valve, wherein the first conveying pipe, the second conveying pipe and the third conveying pipe are sequentially connected and communicated with one another; the second conveying pipe comprises a first pipe section which is parallel to the first conveying pipe and has two open ends, and a second pipe section which is formed by bending and extending the first pipe section and is communicated with the first pipe section; the axis of the first pipe section intersects with the axis of the second pipe section. The first conveying pipe and the exhaust valve are fixed to the two ends of the first pipe section correspondingly. The third conveying pipe communicates with and is fixed to the end, away from the first pipe section, of the second pipe section. The end, close to the exhaust valve, of the first pipe section is farther away from the first conveying pipe than the second pipe section. According to the liquid cooling system pipeline exhaust structure, the sensitivity of the exhaust valve in the exhaust triggering process can be improved, the exhaust effect and the exhaust efficiency can be improved, and corrosion reaction of the liquid cooling system pipeline exhaust structure caused by existence of gas is avoided.

Description

Technical Field

[0001] The present invention relates to the field of liquid cooling technology, and in particular to a liquid cooling system pipeline exhaust structure and a liquid cooling system. Background Art

[0002] Liquid cooling systems are a highly effective thermal management method in modern data centers and high-performance computing environments, and are now widely used to cool servers, storage devices, and other high-heat-generating electronic components. Compared to traditional air-cooled systems, liquid cooling systems offer higher heat dissipation efficiency and lower energy consumption, making them particularly well-suited for the intense heat generated by processing large amounts of data and performing complex computing tasks.

[0003] An often-overlooked yet crucial issue in the actual operation of liquid cooling systems is the presence of gas and the negative impact it can have if it's not removed promptly. Gas can originate from air that enters the system during installation, maintenance, or refilling. Furthermore, when the coolant's temperature or pressure fluctuates, dissolved gas can precipitate and form bubbles.

[0004] The exhaust structure of a liquid cooling system in the prior art involves installing an automatic exhaust valve at the elbow of a horizontal or vertical pipe, or directly on the horizontal pipe. The valve is equipped with a float connected to the valve core via a connecting rod. When gas in the coolant naturally rises and accumulates at the location of the automatic exhaust valve, the float is lifted by the gas, which in turn drives the valve core to open the exhaust port, allowing the gas to be discharged from the liquid cooling system. When the exhaust process is complete, the float drops as the gas is discharged, causing the valve core to close, preventing coolant loss.

[0005] Although the above-mentioned exhaust structure can exhaust the gas in the liquid cooling system, it cannot effectively gather the gas to the highest point of the liquid cooling system because the bubbles in the coolant will not move completely along the expected path. Especially when the coolant flow rate is unstable or the liquid cooling system design is complex, the gas will not be able to reach the position of the automatic exhaust valve smoothly, which will affect the operation of the float or the valve core and reduce the exhaust efficiency. In addition, the float or the float requires sufficient gas pressure to be lifted to trigger the action of the valve core. However, in actual application, due to factors such as gas dispersion and flow rate changes, the float or the float will not be able to respond to small amounts of gas accumulation in a timely manner, which will cause exhaust delays or even the inability to fully exhaust the gas. Over time, especially when the liquid cooling system is in long-term operation, the float or the float and its connecting mechanism will undergo corrosion reactions due to the presence of gas, which greatly affects the sensitivity of the exhaust structure to gas and the accuracy of the valve core action.

[0006] In summary, the exhaust structure of the liquid cooling system in the related art not only has low exhaust efficiency and poor exhaust effect, but also has poor sensitivity in triggering the exhaust process, and is prone to corrosion reactions due to the presence of gas. Summary of the Invention

[0007] The purpose of the present invention is to provide a new liquid cooling system pipeline exhaust structure and a liquid cooling system to solve the problem that the liquid cooling system pipeline exhaust structure of the liquid cooling system in the related art not only has low exhaust efficiency and poor exhaust effect, but also has poor sensitivity in triggering the exhaust process, and is prone to corrosion reactions due to the presence of gas.

[0008] In a first aspect, the present invention provides a liquid cooling system pipeline exhaust structure, comprising a first delivery pipe, a second delivery pipe, and a third delivery pipe connected in sequence and communicating with each other, and an exhaust valve fixedly connected to the second delivery pipe; the axes of the first delivery pipe and the third delivery pipe are perpendicular to each other;

[0009] The second delivery pipe includes a first pipe section parallel to the first delivery pipe and open at both ends, and a second pipe section bent and extended from the first pipe section and connected to the first pipe section; the axis of the first pipe section intersects with the axis of the second pipe section; the first delivery pipe and the exhaust valve are respectively connected and fixed at both ends of the first pipe section, and the third delivery pipe is connected and fixed to an end of the second pipe section away from the first pipe section; the end of the first pipe section close to the exhaust valve is farther away from the first delivery pipe than the second pipe section.

[0010] Preferably, the axis of the second pipe section coincides with the axis of the third delivery pipe.

[0011] Preferably, the exhaust valve includes a sealing cover fixed to the end of the first pipe section away from the first delivery pipe, a hollow valve body fixed to the sealing cover, a valve core fixed to the end of the valve body away from the sealing cover, a first exhaust hole extending from the side of the valve core away from the valve body to the other side opposite thereto, a valve cap covering the valve core and blocking the first exhaust hole, and a second exhaust hole extending from the side of the valve cap away from the valve body to the other side opposite thereto; the end of the valve body close to the sealing cover extends through the sealing cover and is sealed and fixed with the sealing cover, and is communicated with the first pipe section, the valve cap is in sliding connection with the valve core, and when the valve cap slides along the valve core in a direction away from the valve body, the first exhaust hole is opened.

[0012] Preferably, the valve body includes a first exhaust pipe fixed to the sealing cover, a second exhaust pipe fixed to an end of the first exhaust pipe away from the sealing cover, and a third exhaust pipe fixed to an end of the second exhaust pipe away from the first exhaust pipe; the sealing cover is provided with a through hole running through it, the first exhaust pipe is inserted into the through hole and is sealed and fixed, and the valve core is fixed to an end of the third exhaust pipe away from the second exhaust pipe.

[0013] Preferably, the valve core includes a cover body fixed to an end of the third exhaust pipe away from the second exhaust pipe, and a first extension part and a second extension part protruding outward and extending from opposite sides of the cover body and arranged opposite to each other, the first extension part is farther away from the third exhaust pipe than the second extension part, and the second extension part is closer to the third exhaust pipe than the first extension part; the first exhaust hole extends from the end of the first extension part away from the cover body to the end of the second extension part away from the cover body, and the diameter of the first exhaust hole close to the end of the third exhaust pipe is smaller than the diameter of the other end thereof, and the valve cap cover is provided on the first extension part and forms a sliding connection with the first extension part.

[0014] Preferably, the third exhaust pipe includes an exhaust pipe section fixed to the end of the second exhaust pipe away from the first exhaust pipe and a hollow pressure cover fixed to the end of the exhaust pipe section away from the second exhaust pipe; the pressure cover presses and fixes the cover body to the end of the exhaust pipe section away from the second exhaust pipe.

[0015] Preferably, the valve cap includes a sleeve portion which is sleeved on the first extension portion and is hollow at both ends, a cover portion fixed to the sleeve portion away from one end of the cover body, and a blocking portion which protrudes and extends from a side of the cover portion close to the first exhaust hole, the blocking portion extends into the first exhaust hole and blocks the first exhaust hole; the second exhaust hole passes through from one side of the cover portion away from the first exhaust hole to the other side opposite thereto.

[0016] Preferably, a protruding and extending clamping portion is provided on the outer side of the first extension portion; an inwardly recessed limiting groove is provided on the side of the sleeve portion close to the clamping portion, and the length of the limiting groove along the extension direction of the first extension portion is equal to the distance the valve cap slides along the first extension portion.

[0017] Preferably, the blocking portion is provided in a middle area of the covering portion; the second exhaust holes include two holes and both are provided at the edge of the covering portion, and the two second exhaust holes are provided opposite to each other.

[0018] In a second aspect, the present invention provides a liquid cooling system, which includes the liquid cooling system pipeline exhaust structure as described above.

[0019] Compared with the related art, the liquid cooling system pipeline exhaust structure in the present invention is achieved by designing the second delivery pipe connecting the first delivery pipe and the third delivery pipe to include a first pipe section parallel to the first delivery pipe and open at both ends, and a second pipe section bent and extended from the first pipe section and connected to the first pipe section, and the axis of the first pipe section is limited to intersect with the axis of the second pipe section, and the end of the first pipe section close to the exhaust valve is farther away from the first delivery pipe than the second pipe section. In this way, gas can be stored in the space at the end of the first pipe section close to the exhaust valve, so that the space for storing gas is located at the highest point of the entire liquid cooling system pipeline exhaust structure, thereby ensuring that the gas can naturally gather in the space for storing gas, so as to improve the sensitivity of the exhaust valve to trigger the exhaust process, and improve the exhaust effect and exhaust efficiency, and avoid corrosion reaction of the liquid cooling system pipeline exhaust structure due to the presence of gas. The entire process does not require manual intervention, and the effect of automatic exhaust is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0021] Figure 1 A schematic diagram of the three-dimensional structure of the pipeline exhaust structure of the liquid cooling system provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structural decomposition of the pipeline exhaust structure of the liquid cooling system provided by an embodiment of the present invention;

[0023] Figure 3 For the Figure 1 Cross-section diagram along line AA;

[0024] Figure 4 For the Figure 1 Cross-section diagram of the middle BB line;

[0025] Figure 5 for Figure 4 A magnified view of the structure of part C;

[0026] Figure 6 This is a structural exploded view of the valve core and valve cap in the liquid cooling system pipeline exhaust structure provided by an embodiment of the present invention.

[0027] Among them, 100, liquid cooling system pipeline exhaust structure; 1, first delivery pipe; 2, second delivery pipe; 21, first pipe section; 22, second pipe section; 3, third delivery pipe; 4, exhaust valve; 41, sealing cover; 411, perforation; 42, valve body; 421, first exhaust pipe; 422, second exhaust pipe; 4221, protrusion; 423, third exhaust pipe; 4231, exhaust pipe section; 4232, pressure cover; 43, valve core; 431, cover body; 432, first extension part; 4321, clamping part; 433, second extension part; 44, first exhaust hole; 45, valve cap; 451, sleeve part; 4511, limiting groove; 452, cover part; 453, blocking part; 46, second exhaust hole. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] The embodiment of the present invention provides a liquid cooling system pipeline exhaust structure 100, combined with Figures 1 to 6 As shown, it includes a first delivery pipe 1, a second delivery pipe 2 and a third delivery pipe 3 which are sequentially connected and communicated with each other, and an exhaust valve 4 which is fixedly communicated with the second delivery pipe 2.

[0031] The axes of the first conveying pipe 1 and the third conveying pipe 3 are perpendicular to each other.

[0032] The second delivery pipe 2 includes a first pipe section 21 parallel to the first delivery pipe 1 and open at both ends, and a second pipe section 22 bent and extended from the first pipe section 21 and connected to the first pipe section 21; the axis of the first pipe section 21 intersects with the axis of the second pipe section 22; the first delivery pipe 1 and the exhaust valve 4 are respectively connected and fixed at both ends of the first pipe section 21, and the third delivery pipe 3 is connected and fixed to the end of the second pipe section 22 away from the first pipe section 21; the end of the first pipe section 21 close to the exhaust valve 4 is farther away from the first delivery pipe 1 than the second pipe section 22 and the third delivery pipe 3.

[0033] The axis of the second pipe section 22 coincides with the axis of the third delivery pipe 3. This design can better concentrate the gas in the gas storage space formed by the end of the first pipe section 21 away from the first delivery pipe 1.

[0034] Combine Figure 2 and Figures 4 to 6As shown, the exhaust valve 4 includes a sealing cover 41 fixed to the end of the first pipe section 21 away from the first delivery pipe 1, a hollow valve body 42 fixed to the sealing cover 41, a valve core 43 fixed to the end of the valve body 42 away from the sealing cover 41, a first exhaust hole 44 extending from the side of the valve core 43 away from the valve body 42 to the other side opposite thereto, a valve cap 45 covering the valve core 43 and blocking the first exhaust hole 44, and a second exhaust hole 46 extending from the side of the valve cap 45 away from the valve body 42 to the other side opposite thereto; the end of the valve body 42 close to the sealing cover 41 extends through the sealing cover 41 and is sealed and fixed to the sealing cover 41, and is communicated with the first pipe section 21, the valve cap 45 is in sliding connection with the valve core 43, and when the valve cap 45 slides along the valve core 43 in a direction away from the valve body 42, the first exhaust hole 44 is opened.

[0035] The valve body 42 is arranged parallel to the first delivery pipe 1 .

[0036] like Figure 2 As shown, the valve body 42 includes a first exhaust pipe 421 fixed to the sealing cover 41, a second exhaust pipe 422 fixed to the end of the first exhaust pipe 421 away from the sealing cover 41, and a third exhaust pipe 423 fixed to the end of the second exhaust pipe 422 away from the first exhaust pipe 421; the sealing cover 41 is provided with a through hole 411 running through it, the first exhaust pipe 421 is inserted into the through hole 411 and is sealed and fixed, and the valve core 43 is fixed to the end of the third exhaust pipe 423 away from the second exhaust pipe 422.

[0037] The inner wall of the second exhaust pipe 422 is provided with a protruding portion 4221 that extends outward and is used to reduce part of the ventilation space in the second exhaust pipe 422. This design can increase the gas pressure in the valve body 42 to better lift the valve cap 45.

[0038] like Figure 2 As shown, the third exhaust pipe 423 includes an exhaust pipe section 4231 fixed to the end of the second exhaust pipe 422 away from the first exhaust pipe 421 and a hollow pressure cover 4232 fixed to the end of the exhaust pipe section 4231 away from the second exhaust pipe 422 .

[0039] like Figure 5As shown, the valve core 43 includes a cover body 431 fixed to the end of the third exhaust pipe 423 away from the second exhaust pipe 422, and a first extension part 432 and a second extension part 433 protruding outward and extending from opposite sides of the cover body 431 and arranged opposite to each other. The first extension part 432 is farther away from the third exhaust pipe 423 than the second extension part 433, and the second extension part 433 is closer to the third exhaust pipe 423 than the first extension part 432; the first exhaust hole 44 passes through the end of the first extension part 432 away from the cover body 431 to the end of the second extension part 433 away from the cover body 431, and the valve cap 45 is covered on the first extension part 432 and forms a sliding connection with the first extension part 432.

[0040] like Figure 5 As shown, the diameter of the first exhaust hole 44 at one end close to the third exhaust pipe 423 is smaller than that at the other end. This design can provide better gas pressure for the valve cap 45 to lift the valve cap 45 to achieve exhaust.

[0041] like Figure 5 As shown, the pressure cover 4232 presses the cover body 431 to be fixed to the end of the exhaust pipe section 4231 away from the second exhaust pipe 422. This design can better seal and fix the valve core 43 to the third exhaust pipe 423.

[0042] Combine Figure 5 and Figure 6 As shown, the valve cap 45 includes a sleeve portion 451 that is sleeved on the first extension portion 432 and is hollow at both ends, a cover portion 452 fixed to the sleeve portion 451 at one end away from the cover body 431, and a blocking portion 453 that protrudes and extends from the side of the cover portion 452 close to the first exhaust hole 44. The blocking portion 453 extends into the first exhaust hole 44 and blocks the first exhaust hole 44; the second exhaust hole 46 passes through the side of the cover portion 452 away from the first exhaust hole 44 to the other side opposite thereto.

[0043] like Figure 6 As shown, the blocking portion 453 is located in the middle of the cover portion 452. Two second exhaust holes 46 are provided, both located at the edge of the cover portion 452, and the two second exhaust holes 46 are arranged opposite each other. This design improves exhaust efficiency. Of course, the number of second exhaust holes 46 can also be one, three, or four, depending on actual needs.

[0044] like Figure 5 As shown, a protruding, extending locking portion 4321 is provided on the outer side of the first extension portion 432; an inwardly recessed limiting groove 4511 is provided on the side of the sleeve portion 451 near the locking portion 4321. The length of the limiting groove 4511 along the extension direction of the first extension portion 432 is equal to the distance the valve cap 45 slides along the first extension portion 432. This design prevents the valve cap 45 from being dislodged by gas.

[0045] The connection relationship between the first delivery pipe 1 and the second delivery pipe 2 and the connection relationship between the second delivery pipe 2 and the third delivery pipe 3 of the liquid cooling system pipeline exhaust structure 100 in this embodiment are respectively detachable fixed connections and form a seal; the connection relationship between the first exhaust pipe 421 and the second exhaust pipe 422 and the connection relationship between the second exhaust pipe 422 and the third exhaust pipe 423 are respectively detachable fixed connections and form a seal.

[0046] When the liquid cooling system pipeline exhaust structure 100 in this embodiment is applied to the liquid cooling system, the first delivery pipe 1 is perpendicular to the placement platform or installation platform of the liquid cooling system, and the second delivery pipe 2 is parallel to the placement platform or installation platform of the liquid cooling system. At this time, the end of the first pipe section 21 away from the first delivery pipe 1 is located at the highest point of the entire liquid cooling system and forms a space for storing gas to ensure that the gas can naturally gather in the gas storage space, thereby improving the efficiency of gas collection; as the gas in the liquid cooling system gradually accumulates, the valve cap 45 will be lifted up and slide along the extension direction of the first extension part 432, so that the blocking part 453 of the valve cap 45 leaves the first exhaust hole 44. At this time, the gas in the valve body 42 will flow to the valve cap 45 through the first exhaust hole 44, and finally be discharged from the second exhaust hole 46 on the valve cap 45; when the gas in the liquid cooling system is discharged, the valve cap 45 will fall back and seal the first exhaust hole 44 through the blocking part 453, effectively preventing the coolant in the liquid cooling system from leaking.

[0047] In this embodiment, the space used to store gas in the liquid cooling system pipe exhaust structure 100 provides a stable environment for the valve cap 45, enabling the valve cap 45 to sensitively respond to gas accumulation. When the gas reaches a certain threshold, the valve cap 45 is lifted, thereby opening the first exhaust hole 44 for exhaust, ensuring that the gas is promptly and thoroughly discharged from the liquid cooling system. Since the gas in the liquid cooling system can be effectively discharged, the risk of local overheating is reduced, ensuring that key components such as the processor are adequately cooled, and improving the operating stability and service life of the equipment using the liquid cooling system pipe exhaust structure 100.

[0048] The liquid cooling system pipe exhaust structure 100 in this embodiment can reduce the amount of gas entering the pump, reduce the probability of cavitation, protect the pump blades and other components from corrosive damage, and extend the service life of the pump. By efficiently exhausting bubbles, it can ensure that there is sufficient space for coolant circulation in the pipe that transports the coolant, maintain a stable flow rate, improve the cooling effect of the liquid cooling system, and avoid the situation where the coolant flow rate is reduced due to bubbles occupying space. It can also reduce the possibility of gas accumulation, reduce the pressure fluctuations in the liquid cooling system, ensure the stable operation of the liquid cooling system, and reduce potential damage to sensitive components such as seals.

[0049] The liquid cooling system pipe exhaust structure 100 in this embodiment stabilizes the chemical properties of the coolant in the liquid cooling system through efficient exhaust, reducing corrosion reactions caused by the presence of gases. It also reduces the risk of tiny particle precipitation and deposition caused by bubble collapse, thus protecting the fluidity and heat dissipation of the liquid cooling system. This efficient exhaust also ensures the accuracy of temperature and pressure measurements by various sensors in the liquid cooling system, providing correct operating parameters and improving the control precision and overall performance of the liquid cooling system.

[0050] Compared with the related art, the liquid cooling system pipeline exhaust structure 100 in this embodiment is designed to include a first pipe section 21 parallel to the first pipe 1 and open at both ends, and a second pipe section 22 bent and extended from the first pipe section 21 and connected to the first pipe section 21, and the axis of the first pipe section 21 is defined to intersect with the axis of the second pipe section 22. The end of the first pipe section 21 close to the exhaust valve 4 is farther away from the first pipe 1 than the second pipe section 22 and the third pipe 3. In this way, gas can be stored in the space near the end of the first pipe section 21 close to the exhaust valve 4, so that the space for storing gas is located at the highest point of the entire liquid cooling system pipeline exhaust structure 100, thereby ensuring that the gas can naturally gather in the space for storing gas, so as to improve the sensitivity of the exhaust valve 4 to trigger the exhaust process, and improve the exhaust effect and exhaust efficiency, and avoid the presence of gas causing corrosion reaction of the liquid cooling system pipeline exhaust structure 100. The entire process does not require manual intervention, and the effect of automatic exhaust is achieved.

[0051] Example 2

[0052] This embodiment provides a liquid cooling system, which includes the liquid cooling system pipe exhaust structure 100 of the first embodiment. Since the liquid cooling system of this embodiment includes the liquid cooling system pipe exhaust structure 100 of the first embodiment, it can also achieve the technical effects achieved by the liquid cooling system pipe exhaust structure 100 of the first embodiment, and will not be described in detail here.

[0053] The above are merely embodiments of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A liquid cooling system pipeline exhaust structure, characterized in that: The liquid cooling system pipeline exhaust structure includes a first delivery pipe, a second delivery pipe, and a third delivery pipe that are sequentially connected and communicated with each other, and an exhaust valve fixedly communicated with the second delivery pipe; the axes of the first delivery pipe and the third delivery pipe are perpendicular to each other; The second delivery pipe includes a first pipe section parallel to the first delivery pipe and open at both ends, and a second pipe section bent and extended from the first pipe section and connected to the first pipe section; the axis of the first pipe section intersects with the axis of the second pipe section; the first delivery pipe and the exhaust valve are respectively connected and fixed at both ends of the first pipe section, and the third delivery pipe is connected and fixed to an end of the second pipe section away from the first pipe section; the end of the first pipe section close to the exhaust valve is farther away from the first delivery pipe than the second pipe section.

2. The liquid cooling system pipeline exhaust structure according to claim 1, characterized in that: The axis of the second pipe section coincides with the axis of the third conveying pipe.

3. The liquid cooling system pipeline exhaust structure according to claim 1, characterized in that: The exhaust valve includes a sealing cover fixed to an end of the first pipe section away from the first delivery pipe, a hollow valve body fixed to the sealing cover, a valve core fixed to an end of the valve body away from the sealing cover, a first exhaust hole extending from a side of the valve core away from the valve body to the other side opposite thereto, a valve cap covering the valve core and blocking the first exhaust hole, and a second exhaust hole extending from a side of the valve cap away from the valve body to the other side opposite thereto; an end of the valve body close to the sealing cover extends through the sealing cover and is sealed and fixed to the sealing cover, and is communicated with the first pipe section, the valve cap is in sliding connection with the valve core, and when the valve cap slides along the valve core in a direction away from the valve body, the first exhaust hole is opened.

4. The liquid cooling system pipeline exhaust structure according to claim 3, characterized in that: The valve body includes a first exhaust pipe fixed to the sealing cover, a second exhaust pipe fixed to an end of the first exhaust pipe away from the sealing cover, and a third exhaust pipe fixed to an end of the second exhaust pipe away from the first exhaust pipe; the sealing cover is provided with a through hole running through it, the first exhaust pipe is inserted into the through hole and is sealed and fixed, and the valve core is fixed to an end of the third exhaust pipe away from the second exhaust pipe.

5. The liquid cooling system pipeline exhaust structure according to claim 4, characterized in that: The valve core includes a cover body fixed to an end of the third exhaust pipe away from the second exhaust pipe, and a first extension portion and a second extension portion protruding outward and extending from opposite sides of the cover body and arranged opposite to each other, the first extension portion is farther away from the third exhaust pipe than the second extension portion, and the second extension portion is closer to the third exhaust pipe than the first extension portion; the first exhaust hole extends from the end of the first extension portion away from the cover body to the end of the second extension portion away from the cover body, and the diameter of the first exhaust hole near the end of the third exhaust pipe is smaller than the diameter of the other end thereof, and the valve cap cover is provided on the first extension portion and forms a sliding connection with the first extension portion.

6. The liquid cooling system pipeline exhaust structure according to claim 5, characterized in that: The third exhaust pipe includes an exhaust pipe section fixed to the end of the second exhaust pipe away from the first exhaust pipe and a hollow pressure cover fixed to the end of the exhaust pipe section away from the second exhaust pipe; the pressure cover presses and fixes the cover body to the end of the exhaust pipe section away from the second exhaust pipe.

7. The liquid cooling system pipeline exhaust structure according to claim 5, characterized in that: The valve cap includes a sleeve portion that is sleeved on the first extension portion and is hollow at both ends, a cover portion fixed to the sleeve portion and away from one end of the cover body, and a blocking portion that protrudes and extends from a side of the cover portion close to the first exhaust hole, the blocking portion extends into the first exhaust hole and blocks the first exhaust hole; the second exhaust hole passes through from one side of the cover portion away from the first exhaust hole to the other side opposite thereto.

8. The liquid cooling system pipeline exhaust structure according to claim 7, characterized in that: A protruding and extending clamping portion is provided on the outer side of the first extension portion; an inwardly recessed limiting groove is provided on the side of the sleeve portion close to the clamping portion, and the length of the limiting groove along the extension direction of the first extension portion is equal to the distance the valve cap slides along the first extension portion.

9. The liquid cooling system pipeline exhaust structure according to claim 7, characterized in that: The blocking portion is arranged in the middle area of the covering portion; the second exhaust holes include two holes and both are arranged at the edge of the covering portion, and the two second exhaust holes are arranged to face each other.

10. A liquid cooling system, characterized in that: The liquid cooling system includes the liquid cooling system pipeline exhaust structure according to any one of claims 1 to 9.

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