A siphon type liquid drainage cold plate

Abstract

The present invention relates to the technical field of automatic liquid drainage, and specifically discloses a siphon drainage cold plate. The siphon drainage cold plate includes a main body and a siphon assembly. The main body includes a bottom plate, a cover plate and fins. The bottom plate and the cover plate are buckled to form a liquid storage tank, and the fins are arranged in the liquid storage tank. One end of the siphon assembly passes through the cover plate and extends into the bottom of the liquid storage tank and is communicated with the liquid storage tank, and the other end is lower than the bottom of the liquid storage tank. By using the siphon principle, the automatic liquid drainage of the cold plate can be realized. The structure of the present invention is simple and the operation is convenient. The automatic liquid drainage can be realized without the aid of equipment, saving equipment and labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic liquid drainage, and particularly to a siphon liquid drainage cold plate. Background Art

[0002] With the development of electronic technology, the unit heat flux density of electronic components is getting larger and the structural size is getting smaller. This makes the heat generated by electronic components during use very large. Therefore, a heat dissipation device is needed to solve the heat dissipation problem of electronic components. Currently, liquid cooling technology can meet the heat dissipation requirements of electronic components to a certain extent. Among them, the method of using a cold plate to dissipate heat from an electronic chip is widely used. In actual use, the cold plate often needs to be disassembled from the cooling system for separate debugging during the research and development stage, or needs to be stored and transported after debugging. At this time, the cold plate is filled with liquid. During the debugging process, heat may accumulate in a short time, or a drastic change in the external environment may also cause the liquid in the cold plate to expand. The above situations may cause the internal stress of the cold plate to increase suddenly and tear the weld seam, and then the cold plate leaks liquid. Seriously, it may cause the liquid to contact the electronic components and cause the electronic components to short-circuit and burn out. Therefore, it is necessary to drain the liquid in the cold plate in time after the test to avoid damage to the electronic components caused by cold plate liquid leakage.

[0003] In the prior art, the liquid drainage of the cold plate is carried out by a liquid drainage device with a fluid connector. This method requires the cold plate to be disassembled from the system, and cold plate liquid leakage may occur during the disassembly process. Moreover, the investment cost of this device is relatively large, and the energy consumption is high and the noise is large. Summary of the Invention

[0004] According to one aspect of the present invention, the present invention provides a siphon liquid drainage cold plate, which can realize autonomous liquid drainage by using the siphon principle, and the liquid drainage is thorough and the cost is relatively low.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A siphon liquid drainage cold plate, comprising:

[0007] A body, the body includes a bottom plate, a cover plate and fins. The bottom plate and the cover plate are buckled to form a liquid storage tank, and the fins are arranged in the liquid storage tank;

[0008] A siphon assembly, one end of the siphon assembly passes through the cover plate and extends into the bottom of the liquid storage tank and is communicated with the liquid storage tank, and the other end is lower than the bottom of the liquid storage tank.

[0009] Optionally, the above siphon assembly includes a siphon tube, a connecting part, and a connecting pipeline. The above connecting part is arranged on the above cover plate. A channel is provided on the above connecting part. One end of the above channel is connected to the above siphon tube. The end of the above siphon tube that is not connected to the above connecting part is lower than the bottom of the above liquid storage tank. The other end of the above channel is connected to the above connecting pipeline. The above connecting pipeline extends into the bottom of the above liquid storage tank.

[0010] Optionally, it further includes a base. A fixed mounting hole is provided on the above base. The above body is fixed to the bottom end of the above base. Part of the above cover plate is placed in the above fixed mounting hole.

[0011] Optionally, the above cover plate is stamped to form a protrusion. The above protrusion is arranged in the above fixed mounting hole. A liquid accumulation groove is formed between the above protrusion and the side wall of the above fixed mounting hole.

[0012] Optionally, the above base is provided with a U-shaped opening. A connecting part is provided at the open end of the above U-shaped opening. The above U-shaped opening and the above connecting part form the above fixed mounting hole.

[0013] Optionally, the above body and the above base are fixedly connected by bolts.

[0014] Optionally, the material of the above base is aluminum alloy.

[0015] Optionally, the connection method between the above connecting part and the above cover plate is welding.

[0016] Optionally, it further includes a liquid inlet pipe. The above liquid inlet pipe is communicated with the above liquid storage tank.

[0017] Optionally, both ends of the above cover plate are provided with connection holes. One of the above connection holes is connected to the above siphon assembly, and the other is connected to the above liquid inlet pipe.

[0018] The beneficial effects of the present invention are as follows:

[0019] By arranging a siphon assembly on the body of the cold plate, and making one end of the siphon assembly extend to the bottommost part of the liquid storage tank of the body, and the siphon assembly is communicated with the liquid storage tank, and the other end of the siphon assembly is lower than the bottom of the liquid storage tank, a liquid level difference is formed at both ends of the siphon assembly. Since the pressures borne by the two ends of the siphon assembly are different, the liquid will flow from the side with greater pressure to the side with smaller pressure until the atmospheric pressures on both sides are equal. Through this siphon principle, the liquid in the liquid storage tank of the cold plate can be quickly pumped out, realizing the automatic liquid discharge of the cold plate, and the liquid discharge is thorough using the siphon principle, and the cost is relatively low. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the siphon type liquid discharge cold plate of the present invention;

[0021] Figure 2Schematic diagram of the structure of the main body of the present invention;

[0022] Figure 3 Schematic diagram of the structure of the base and the connecting part of the present invention;

[0023] Figure 4 Bottom view of the base of the present invention;

[0024] Figure 5 Bottom view of the assembly drawing of the base, the connecting part and the main body of the present invention;

[0025] Figure 6 Assembly drawing of the siphon type liquid discharge cold plate of the present invention.

[0026] In the figure:

[0027] 100, main body; 110, bottom plate; 120, cover plate; 121, protrusion; 130, fin; 200, siphon assembly; 210, siphon tube; 220, communication part; 230, connecting pipeline; 300, base; 400, connecting part; 500, liquid inlet pipe. Specific embodiments

[0028] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0032] Cold plates are commonly used in the heat dissipation field, especially for the heat dissipation of electronic products. During the development process of cold plates, it is necessary to test the performance of cold plates. At this time, the cold plates need to be removed from the cooling system, or the debugged cold plates need to be stored and transported. When debugging, the cold plates are filled with liquid. If the liquid in the cold plates is not drained in time, it is very likely to cause liquid leakage of the cold plates during the removal process, and the cold plates are also prone to leakage during transportation. Once the leaked liquid encounters electronic products, it will cause the electronic products to short-circuit. Therefore, it is necessary to completely drain the liquid in the cold plates before removing or transporting the cold plates to avoid the liquid contacting the chips of the electronic products and causing the electronic products to short-circuit. The existing cold plates need to rely on a liquid drainage device with a fluid connector to drain the liquid, which makes it necessary to first disassemble and install the cold plates from the cooling system onto the liquid drainage device to drain the liquid, and it is impossible to avoid the problem of liquid leakage of the cold plates during the disassembly process. Moreover, the investment cost of this device is very high, and the energy consumption is high, the noise is large, and the equipment and labor costs required for draining the liquid of the cold plates are also relatively high.

[0033] In view of the above problems, in an embodiment of the present invention, a siphon liquid drainage cold plate is provided. Siphon is a fluid mechanics phenomenon. Physically, it refers to that due to the existence of gravitational force and potential energy difference between liquid molecules, the liquid will flow from the side with higher pressure to the side with lower pressure. Although the atmospheric pressures on both sides of the water are equal, due to the water level difference, the water on the side with higher water pressure flows down due to gravity, and the water on the side with lower water pressure flows up due to atmospheric pressure until the sum of the atmospheric pressures and water pressures on both sides is equal. As Figure 1As shown in the figure, the siphon drainage cold plate includes a body 100 and a siphon assembly 200. The body 100 is composed of a bottom plate 110, a cover plate 120, and fins 130. The bottom plate 110 and the cover plate 120 can be buckled together to form a liquid storage tank after buckling. The liquid in the cold plate is stored in the liquid storage tank, and the fins 130 are also arranged in the liquid storage tank. The fins 130 can increase the heat transfer area and improve the heat dissipation effect of the above siphon drainage cold plate. The bottom plate 110 is in contact with the heat dissipation area, receives external heat and then dissipates heat. One end of the siphon assembly 200 passes through the cover plate 120 and extends to the bottom of the liquid storage tank and is connected to the liquid storage tank. The other end of the siphon assembly 200 is lower than the bottom of the liquid storage tank. This structure causes a liquid level difference at both ends of the siphon assembly 200. Once the siphon is formed, the liquid in the liquid storage tank will quickly be pumped out and drained dry along the siphon assembly 200.

[0034] By connecting the siphon assembly 200 to the liquid storage tank and utilizing the liquid level difference at both ends of the siphon assembly 200, the liquid in the liquid storage tank is discharged through the siphon assembly 200. Inserting one end of the siphon assembly 200 into the bottom of the liquid storage tank can ensure that the liquid in the liquid storage tank is completely discharged. This siphon drainage cold plate using the siphon principle can achieve self-drainage, without the need to use additional drainage equipment, reducing costs, and having a simple structure and convenient operation.

[0035] Further, continue to refer to Figure 1 , the siphon assembly 200 includes a siphon tube 210, a connecting part 220, and a connecting pipeline 230. Among them, the connecting part 220 is fixedly connected to the cover plate 120. In one embodiment, the connecting part 220 can be connected to the cover plate 120 by welding; in other embodiments, the connecting part 220 can also be fixed on the cover plate 120 by bolt connection. To facilitate the connection between the connecting part 220 and the cover plate 120, the connecting part 220 can be in the shape of a cuboid. A channel is opened on the connecting part 220. In one embodiment, the channel can be formed by drilling in the connecting part 220. One end of the channel is connected to the siphon tube 210, and the other end is connected to the connecting pipeline 230.

[0036] Further, one end of the channel is arranged at the bottom of the connecting part 220, and a connecting hole is provided on the cover plate 120. One end of the connecting pipeline 230 extends into the bottom of the liquid storage tank to ensure that the liquid in the liquid storage tank can be completely drained. The other end passes through the above connecting hole and is connected to the channel. The other end of the channel is arranged at one side end of the connecting part 220 and is connected to the siphon tube 210. After the siphon tube 210 is connected to the channel, it is necessary to ensure that the end of the siphon tube 210 not connected to the channel is lower than the bottom of the liquid storage tank, so as to utilize the liquid level difference to discharge the liquid in the liquid storage tank. In this embodiment, the siphon tube 210 can be an inverted U-shaped tube, but the height of the highest point of the siphon tube 210 from the liquid level of the liquid storage tank shall not be higher than the height of the water column supported by the atmospheric pressure.

[0037] Further, as Figure 2 shown, the bottom plate 110 and the cover plate 120 can be integrally formed by stamping. A protrusion 121 can be formed by stamping on the side of the cover plate 120 close to the bottom plate 110. After the bottom plate 110 and the cover plate 120 are buckled together through the protrusion 121, a liquid storage tank for storing liquid can be better formed. The fin 130 is arranged in the liquid storage tank to increase the heat dissipation area. The fin 130 can be selected in various structural forms, such as: snap-on fins, folding ruler fins, and shovel teeth fins, etc. In one embodiment, the bottom plate 110 and the cover plate 120 can be fixedly connected by welding to enhance the sealing performance between the bottom plate 110 and the cover plate 120 and prevent the liquid in the liquid storage tank from leaking.

[0038] Preferably, in this embodiment, the above-mentioned siphon drainage cold plate further includes a base 300. The base 300 can be made of aluminum alloy material. Aluminum alloy is light in weight, corrosion-resistant, and high in strength, and can be integrally formed by stamping with aluminum alloy. In one embodiment, fixing mounting holes are provided on the base 300, and the edge after connecting the bottom plate 110 and the cover plate 120 is connected to the bottom end of the base 300. In this embodiment, the body 100 and the base 300 can be connected by means of bolt connection; in other embodiments, the body 100 and the base 300 can also be connected by welding. The protrusion 121 formed by stamping on the cover plate 120 is arranged in the fixing mounting hole. At this time, the surface area of the fixing mounting hole is larger than the surface area of the protrusion 121 and smaller than the surface areas of the bottom plate 110 and the cover plate 120. In this way, a liquid accumulation groove is formed between the side wall of the fixing mounting hole and the protrusion 121. If the liquid storage tank leaks, the liquid accumulation groove can temporarily store part of the leaked liquid and prevent the leaked liquid from directly contacting the electronic components, thereby causing the electronic components to short-circuit. In other embodiments, as Figure 3 shown, a U-shaped opening can also be opened on the base 300, and a connecting portion 400 is connected to the U-shaped opening of the base 300 for blocking the U-shaped opening of the base 300. The U-shaped opening of the base 300 and the connecting portion 400 together form a fixing mounting hole. The edge after connecting the cover plate 120 and the bottom plate 110 is connected to the bottom end of the base 300, and the protrusion 121 on the cover plate 120 is arranged in the fixing mounting hole. At this time, a liquid accumulation groove is also formed between the side wall of the fixing mounting hole and the protrusion 121 for storing part of the liquid leaked from the liquid storage tank.

[0039] Further, as Figure 4As shown, a groove is provided at the bottom of the base 300. The groove is wound around the U-shaped opening. When the body 100 is assembled with the base 300, the protrusion 121 of the cover plate 120 is installed in the U-shaped opening, and the edge after the cover plate 120 is connected to the bottom plate 110 is installed in the groove. When assembling the body 100 and the base 300, the groove can play a role in longitudinally limiting the body 100. At the same time, after connecting the base 300 with the chip, the body 100 is fixed between the groove and the chip, thereby improving the connection stability between the body 100 and the base 300, and the contact stability between the body 100 and the chip.

[0040] Preferably, the side wall of the cover plate 120 abuts against the side wall of the groove, thereby realizing the lateral limit of the base 300 on the body 100, avoiding the problem of lateral movement of the body 100 after the body 100 and the base 300 are assembled, and improving the connection stability between the body 100 and the base 300, and the contact stability between the body 100 and the chip.

[0041] Preferably, the top end face of the cover plate 120 is flush with the top end face of the base 300, reducing the longitudinal height of the siphon type liquid discharge cold plate, making its overall structure compact, and being able to adapt to a relatively narrow chip installation space.

[0042] Optionally, as Figure 5 shown, the bottom plate 110 is placed in the groove, and the bottom end face of the bottom plate 110 is flush with the bottom end face of the base 300, further reducing the longitudinal height of the siphon type liquid discharge cold plate and making its overall structure more compact.

[0043] Preferably, the combined action of the base 300 with a U-shaped opening and the connecting part 400 can enable the base 300 to adapt to siphon type liquid discharge cold plates of different sizes and different shapes. Only by using different connecting parts 400, the body 100 can be kept in a rectangular structure on the horizontal plane to adapt to the chip installation space.

[0044] Preferably, the base 300 and the chip are connected by a spring bolt. Since the spring bolt has the effect of increasing the pre-tightening force, the fastening force between the base 300 and the chip connected by the spring bolt is effectively improved, thereby improving the reliability of the connection between the base 300 and the chip.

[0045] Preferably, the number of spring bolts is multiple, and the multiple spring bolts are evenly spaced. When the spring bolts are tightened, their springs undergo elastic deformation and generate elastic forces, which act on the base 300 and the chip. When elastic forces are generated by multiple evenly spaced spring bolts, the forces acting between the base 300 and the chip can be balanced with each other, so that the tightness of the connection between the base 300 and the chip becomes more uniform. Since the protruding part 121 of the cover plate 120 is partially placed in the fixed mounting hole of the base 300, and the bottom plate 110 is in contact with the chip, when the tightness of the connection between the base 300 and the chip becomes more uniform, the tightness of the contact between the bottom plate 110 and the chip can also become more uniform, thereby enabling the siphon type liquid discharge cold plate to evenly absorb the heat dissipated from different positions of the chip and improving the heat dissipation capacity of the siphon type liquid discharge cold plate.

[0046] Preferably, the above-mentioned bottom plate 110, cover plate 120, and base 300 are all made by stamping process. On the one hand, the stamping process has a simple production process and requires a relatively low investment in production equipment. Compared with the numerical control machining process used in the prior art, it can effectively reduce production costs, simplify the production process, and shorten the production cycle.

[0047] On the other hand, in the prior art, the bottom plate 110 is made by numerical control machining and then welding. Since the welding process has certain strength requirements for welded parts, in the prior art, the bottom plate 110 is relatively thick, usually about 2 mm. However, for the siphon type liquid discharge cold plate provided in this embodiment, its bottom plate 110 is made by stamping process, and the stamping process does not have strength requirements for stamped parts, so its thickness is relatively thin. The thickness of the stamped part is usually 1.2 mm - 1.5 mm. Exemplarily, it can be 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc. The relatively thin bottom plate 110 can improve the heat dissipation performance of the siphon type liquid discharge cold plate and effectively improve the heat dissipation efficiency of the siphon type liquid discharge cold plate.

[0048] Preferably, as Figure 6 shown, in one embodiment, the above-mentioned siphon type liquid discharge cold plate is further provided with a liquid inlet pipe 500. Because during the test stage of the siphon type liquid discharge cold plate, it is necessary to ensure that the liquid in the liquid storage tank is always in a circulating state. The liquid inlet pipe 500 is used to supplement the liquid in the liquid storage tank, and the siphon assembly 200 discharges the liquid from the liquid storage tank. Two connection holes can be opened at both ends of the cover plate 120. One connection hole is connected to the siphon assembly 200, and the other connection hole is connected to the liquid inlet pipe 500. Setting the positions of the two connection holes at the two relatively far ends of the cover plate 120 can ensure that the liquid in the liquid storage tank undergoes sufficient circulating replacement.

[0049] The working process of the above-mentioned siphon type liquid discharge cold plate is as follows:

[0050] The above-mentioned siphon drainage cold plate test is completed. At this time, the liquid storage tank is filled with liquid. Remove the redundant pipelines and discharge the air in the siphon assembly 200. Since the liquid outlet of the siphon assembly 200 is lower than the bottom of the liquid storage tank, a siphon is formed at this time and the liquid discharge starts until the liquid in the liquid storage tank is completely discharged and the liquid discharge ends.

[0051] During the above liquid discharge process, the height from the highest point of the siphon assembly 200 to the liquid level of the liquid storage tank shall not be higher than the height of the water column supported by the atmospheric pressure.

[0052] The above step of discharging the air in the siphon assembly 200 can be achieved by pumping air from the liquid outlet of the siphon assembly 200, or by inflating air from the liquid inlet pipe 500, so that the liquid fills the siphon assembly 200, discharges the air in the siphon assembly 200, and then seals the liquid inlet pipe 500.

[0053] For the siphon drainage cold plate of the present invention, by arranging the siphon assembly 200 on the cover plate 120, one end of the siphon assembly 200 extends into the bottom of the liquid storage tank and is communicated with the liquid storage tank, and the other liquid outlet is lower than the bottom of the liquid storage tank. The liquid in the liquid storage tank is drained dry by the siphon principle. The siphon drainage cold plate has a simple structure and is easy to operate. Without the aid of other liquid discharge devices, it can achieve autonomous liquid discharge, saving the equipment and labor costs caused by using special liquid discharge devices.

[0054] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A siphon type liquid discharge cold plate, characterized in that, Comprising: A body (100), the body (100) includes a bottom plate (110), a cover plate (120) and fins (130), the bottom plate (110) and the cover plate (120) are snapped together to form a liquid storage tank, and the fins (130) are arranged in the liquid storage tank; A siphon assembly (200), one end of the siphon assembly (200) passes through the cover plate (120) and extends into the bottom of the liquid storage tank and is communicated with the liquid storage tank, and the other end is lower than the bottom of the liquid storage tank; The siphon assembly (200) includes a siphon pipe (210), a connecting portion (220) and a connecting pipeline (230), the connecting portion (220) is arranged on the cover plate (120), a channel is provided on the connecting portion (220), one end of the channel is connected to the siphon pipe (210), the end of the siphon pipe (210) not connected to the channel is lower than the bottom of the liquid storage tank, the other end of the channel is connected to the connecting pipeline (230), and the connecting pipeline (230) extends into the bottom of the liquid storage tank; It further includes a liquid inlet pipe (500), and the liquid inlet pipe (500) is communicated with the liquid storage tank.

2. The siphon drainage cold plate according to claim 1, characterized in that, It further includes a base (300), the base (300) is provided with a fixed mounting hole, the body (100) is fixed to the bottom end of the base (300), and a part of the cover plate (120) is placed in the fixed mounting hole.

3. The siphon drainage cold plate according to claim 2, wherein The cover plate (120) is stamped with a protrusion (121), the protrusion (121) is arranged in the fixed mounting hole, and a liquid accumulation groove is formed between the protrusion (121) and the side wall of the fixed mounting hole.

4. The siphon drainage cold plate according to claim 2, wherein The base (300) is provided with a U-shaped opening, and a connecting portion (400) is provided at the open end of the U-shaped opening, and the U-shaped opening and the connecting portion (400) form the fixed mounting hole.

5. The siphon type liquid discharge cold plate according to claim 2, wherein, The body (100) and the base (300) are fixedly connected by bolts.

6. The siphon drainage cold plate according to claim 2, characterized in that The material of the base (300) is aluminum alloy.

7. The siphon drainage cold plate according to claim 1, wherein The connection mode of the connecting portion (220) and the cover plate (120) is welding.

8. The siphon drainage cold plate according to claim 1, characterized in that, Both ends of the cover plate (120) are provided with connection holes, one of the connection holes is connected to the siphon assembly (200), and the other is connected to the liquid inlet pipe (500).

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