Immersed phase change liquid cooling system

Abstract

The utility model relates to the technical field of servers, and discloses an immersed phase change liquid cooling system which comprises a cabinet and a steam recovery assembly. The cabinet comprises a bottom plate, a side plate and a top cover, the bottom plate, the side plate and the top cover are sequentially connected to form a containing space, and the containing space is used for being filled with cooling liquid. The steam recovery assembly is arranged on the portion, close to the top cover, of the side plate and comprises an air extractor, a condensing device, a backflow device and an exhaust channel. The air extractor is used for extracting gas in the containing space, the condensing device is used for condensing gaseous cooling liquid in the gas, and the backflow device is used for enabling liquid cooling liquid formed through condensation to flow back into the containing space. And the exhaust channel is selectively opened or closed, and when the exhaust channel is opened, the exhaust channel is used for exhausting the air which passes through the condensing device but is not condensed out of the cabinet. According to the immersed phase change liquid cooling system, the waste of the cooling liquid can be reduced, and the operation cost of the immersed phase change liquid cooling system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to server technical field, especially a kind of immersion phase change liquid cooling system. BACKGROUND

[0002] Compared with air conditioning refrigeration system, immersion phase change liquid cooling heat dissipation system is also used latent heat of cold source to take away heat, so as to achieve the purpose of heat dissipation for equipment. Because the heat exchange capacity of immersion phase change liquid cooling heat dissipation system is large, and the heat exchange coefficient is also high, it can well meet the heat dissipation demand of high-power chip, therefore, more and more servers begin to adopt the form of immersion phase change liquid cooling for heat dissipation.

[0003] As a common coolant, fluorinated liquid is in the cycle of boiling and condensing during the operation of phase change liquid cooling equipment. To reduce the escape of fluorinated liquid, the entire cabinet is isolated from air. However, servers need to be repaired or replaced from time to time, so it is inevitable to open the cover of the cabinet, and a large amount of fluorinated liquid vapor will escape into the air and cannot be recovered during this process, thereby causing waste of fluorinated liquid and greatly increasing the operating cost of immersion phase change liquid cooling system. SUMMARY

[0004] The utility model provides a kind of immersion phase change liquid cooling system, by recycling gaseous coolant to reduce the waste of coolant, reduce the operating cost of immersion phase change liquid cooling system.

[0005] The utility model provides a kind of immersion phase change liquid cooling system, including cabinet and vapor recovery component;

[0006] The cabinet includes bottom plate, side plate and top cover, the bottom plate, the side plate and the top cover are sequentially connected to form accommodating space, and the accommodating space is used to fill coolant;

[0007] The vapor recovery component is arranged at the part of the side plate close to the top cover, and the vapor recovery component includes air extraction device, condensing device, reflux device and exhaust passage;

[0008] The air extraction device is used to extract gas in the accommodating space, the condensing device is used to condense gaseous coolant in the gas, and the reflux device is used to return liquid coolant condensed to form into the accommodating space;

[0009] The exhaust passage can be optionally opened or closed, and when the exhaust passage is opened, the exhaust passage is used to exhaust air in the gas, which has not been condensed by the condensing device, out of the cabinet.

[0010] The immersion type phase change liquid cooling system provided by the utility model is provided with a steam recovery assembly, can be used for condensing gaseous cooling liquid, thereby liquefying the gaseous cooling liquid, and then returning to the cabinet through the reflux device.When the system is normally operated, the top cover is not opened, and the air extraction device and the exhaust passage are both closed; since the steam recovery assembly is arranged at a position close to the top cover, the vaporized cooling liquid can automatically flow to the condensing device, is condensed and liquefied, and then returns to the cabinet; after the top cover is opened, the external atmosphere is communicated with the inside of the cabinet, the air extraction device and the exhaust passage can be opened, the air extraction device sucks the mixed gas of gaseous cooling liquid and air to the condensing device, the condensing device condenses the gaseous cooling liquid, and the air not condensed by the condensing device is discharged out of the cabinet through the exhaust passage.Therefore, the immersion type phase change liquid cooling system in the utility model can recover the gaseous cooling liquid under the cabinet opening condition, thereby reducing the waste of the cooling liquid and reducing the operation cost of the system.

[0011] In some possible embodiments, the top cover and the side plate have a first working position and a second working position;

[0012] When the top cover is in the first working position, the top cover covers the side plate;

[0013] When the top cover is in the second working position, at least a part of the top cover is separated from the side plate, so that the accommodation space is communicated with the outside;

[0014] The immersion type phase change liquid cooling system further comprises a detection device, and the detection device is used for detecting whether the top cover is in the first working position or the second working position.

[0015] In some possible embodiments, the detection device comprises a pressure sensitive sensor, and the pressure sensitive sensor is arranged on the inner wall of the side plate;

[0016] When the top cover is in the first working position, the top cover is pressed against the pressure sensitive sensor; when the top cover is in the second working position, the top cover is separated from the pressure sensitive sensor.

[0017] In some possible embodiments, the steam recovery assembly further comprises an exhaust device, the exhaust device is communicated with the exhaust passage, and the exhaust device comprises an electric exhaust valve.

[0018] In some possible embodiments, the reflux device comprises a liquid collecting tank and a reflux pipe, the liquid collecting tank is arranged at the bottom of the condensing device, one end of the reflux pipe is communicated with the liquid collecting tank, and the other end of the reflux pipe is communicated with the accommodation space.

[0019] In some possible implementation forms, the first heat exchange device is configured to exchange heat with the condensed liquid in the condensing device, and the cold source device is configured to provide cooling medium to the first heat exchange device.

[0020] In some possible implementation forms, the second heat exchange device is configured to exchange heat with the cooling liquid in the accommodation space, and the cold source device is further configured to provide cooling medium to the second heat exchange device.

[0021] In some possible implementation forms, the first heat exchange device is in communication with the cold source device through a first liquid inlet pipeline and a first liquid outlet pipeline, and the first liquid inlet pipeline is provided with a pump body.

[0022] The second heat exchange device is in communication with the cold source device through a second liquid inlet pipeline and a second liquid outlet pipeline, the second liquid inlet pipeline is connected to the first liquid inlet pipeline at a position between the first heat exchange device and the pump body, and the second liquid outlet pipeline is connected to the first liquid outlet pipeline.

[0023] In some possible implementation forms, the second liquid outlet pipeline is provided with a switch valve.

[0024] In some possible implementation forms, the cabinet is in communication with the second heat exchange device through two circulating heat exchange pipelines, and the return device is in communication with one of the circulating heat exchange pipelines. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view that the immersion type phase change liquid cooling system cabinet is not opened in the embodiment of the utility model;

[0026] Figure 2 It is a structure schematic view that the immersion type phase change liquid cooling system cabinet is opened in the embodiment of the utility model;

[0027] Figure 3 It is a structure schematic view that the condensing device is embedded with a circulating pipeline in the embodiment of the utility model.

[0028] In the figure:

[0029] 10 - server; 21 - first circulation heat exchange pipeline; 22 - second circulation heat exchange pipeline; 23 - first circulation pump; 31 - first liquid inlet pipeline; 32 - first liquid outlet pipeline; 40 - pump body; 51 - third circulation heat exchange pipeline; 52 - fourth circulation heat exchange pipeline; 53 - second circulation pump; 61 - second liquid inlet pipeline; 62 - second liquid outlet pipeline; 63 - switch valve; 100 - cabinet; 110 - bottom plate; 120 - side plate; 130 - top cover; 200 - steam recovery assembly; 210 - air extraction device; 220 - condensing device; 230 - exhaust device; 240 - backflow device; 250 - shell; 260 - exhaust passage; 241 - liquid collecting tank; 242 - backflow pipe; 300 - first heat exchange device; 400 - second heat exchange device; 500 - cold source device; 600 - detection device; 610 - pressure sensitive sensor; 700 - circulation pipeline. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] With reference to Figure 1 The immersion phase change liquid cooling system in the embodiments of the present application comprises a cabinet 100, a steam recovery assembly 200, a first heat exchange device 300, a second heat exchange device 400 and a cold source device 500. The cabinet 100 can comprise a bottom plate 110, a side plate 120 and a top cover 130, which are connected in sequence to form a relatively sealed accommodation space, and the accommodation space is filled with cooling liquid.

[0032] In the present embodiment, the immersion phase change liquid cooling system can be used for heat dissipation of electronic equipment generating heat during operation, and the electronic equipment can be, for example, a server 10. Figure 1The server 10 is cooled, specifically, the server 10 is immersed in the cooling liquid, and heat generated by the server 10 is transferred to the cooling liquid, so that the server 10 is cooled. In this way, the first station and / or the second station is provided between the top cover 130 and the side plate 120 for facilitating the server 10 to be placed in or taken out of the cooling liquid. When the top cover 130 is in the first station, the top cover 130 covers the side plate 120, and at this time, the accommodating space in the cabinet 100 is a relatively closed space, and the immersion phase change liquid cooling system is in normal operation. When the top cover 130 is in the second station, at least a part of the top cover 130 is separated from the side plate 120, and at this time, the inside of the cabinet 100 is communicated with the outside, so as to facilitate the server 10 to be placed in or taken out of the cooling liquid.

[0033] In specific implementation, the top cover 130 can be connected to the side plate 120 by means of pivoting, that is, one end of the top cover 130 is connected to the side plate 120 by means of a rotating shaft structure, and at this time, the top cover 130 can rotate relative to the side plate 120, so as to switch between the first station and the second station. The other end of the top cover 130 can also be buckled to the side plate 120 by means of a limiting device, so as to ensure that the top cover 130 cannot be easily rotated relative to the side plate 120 when the top cover 130 is in the first station. Alternatively, the top cover 130 can be detachably connected to the side plate 120, and the top cover 130 and the side plate 120 can be fixed and limited by means of a clamping buckle, so as to ensure the relative fixation between the top cover 130 and the side plate 120. When it is needed to open the top cover 130, the top cover 130 and the side plate 120 can be manually separated.

[0034] In some embodiments, the cooling liquid can be fluorinated liquid, and because the boiling point of the fluorinated liquid is low, when the heat of the server 10 is transferred to the fluorinated liquid, the fluorinated liquid is vaporized by heat, so as to be converted into gaseous fluorinated liquid. Therefore, when the accommodating space is filled with the cooling liquid, the height of the cooling liquid is lower than the height of the top cover 130, so as to leave a part of space between the cooling liquid and the top cover 130 to accommodate the gaseous fluorinated liquid, and avoid the liquid level of the cooling liquid being too high to affect the cooling effect. At this time, the space between the bottom of the cabinet 100 and the liquid surface of the cooling liquid can be referred to as a liquid phase layer, and the space between the liquid surface of the cooling liquid and the top cover 130 can be referred to as a gas phase layer, and in specific implementation, the height of the gas phase layer can be designed according to actual requirements (for example, the number of servers 10, the size of the cabinet 100, etc.), which will not be described here in detail.

[0035] Continuing to refer to Figure 1The steam recovery assembly 200 is arranged on the side plate 120 close to the top cover 130, that is, the steam recovery assembly 200 is opposite to the gas phase layer, and the cooling liquid of the liquid phase layer cannot enter the steam recovery assembly 200. The steam recovery assembly 200 can include an air extraction device 210, a condensing device 220, a reflux device 240, a shell 250, and an exhaust passage 260, wherein the shell 250 is arranged on the side plate 120, and the condensing device 220 is arranged in the shell 250. As an optional embodiment, the side plate 120 can be provided with a first opening at a position where the steam recovery assembly 200 is arranged, and one side of the shell 250 is provided with a second opening. The shell 250 can be fixed on the side plate 120 by welding or the like, and at this time, the first opening is opposite to the second opening, so that the cabinet 100 and the shell 250 are in communication.

[0036] The exhaust passage 260 can be arranged on the shell 250, and the exhaust passage 260 is optionally opened or closed. When the exhaust passage 260 is opened, the inside of the shell 250 and the outside can be in communication through the exhaust passage 260. When the exhaust passage 260 is closed, the inside of the shell 250 and the cabinet 100 can form a relatively closed space.

[0037] The air extraction device 210 is used to extract the gas in the gas phase layer, the condensing device 220 is arranged in the shell 250 and is used to condense the gaseous cooling liquid in the gas, the reflux device 240 is used to return the condensed liquid cooling liquid to the liquid phase layer, and the exhaust passage 260 is used to exhaust the air in the gas which passes through the condensing device 220 but is not condensed out of the shell 250.

[0038] The exhaust passage 260 can be, for example, an exhaust hole arranged on the shell 250. The exhaust hole can be located at the top of the condensing device 220, or the exhaust hole can be located at the side of the condensing device 200 but higher than the condensing device 220. The exhaust hole can be sealingly connected with a sealing cover. When the sealing cover is covered on the exhaust hole, the exhaust hole is separated from the outside. When the sealing cover is removed, the exhaust hole is in communication with the outside.

[0039] It can be understood that, taking the cooling liquid as the fluorinated liquid as an example, the boiling point of the fluorinated liquid is about 47°C under normal pressure. At this time, the condensing temperature of the condensing device 220 can be set to 47°C or slightly lower than 47°C, for example, 46°C. When the air extraction device 210 extracts the fluorinated liquid vapor to the condensing device 220, the fluorinated liquid vapor is converted into liquid fluorinated liquid under the condensing action, and then flows back into the cabinet 100 through the reflux device 240, so as to complete the circulation of the cooling liquid in the cabinet 100.

[0040] When the immersion phase change liquid cooling system works normally, for example, Figure 1As shown, the top cover 130 is in the first working position, the condenser 220 and the return device 240 are working, the exhaust channel 260 is closed, the fluorinated liquid in the cabinet 100 vaporizes and flows to the condenser 220, where it is liquefied under the condensing action of the condenser 200, and then the liquefied fluorinated liquid is sent back to the cabinet 100 through the return device 240, thereby ensuring that the volume of the fluorinated liquid in the cabinet 100 remains basically unchanged.

[0041] When it is necessary to open the lid to run, such as Figure 2 As shown, the top cover 130 is in the second working position, with the gas phase layer connected to the atmosphere. The extraction device 210, condensation device 220, reflux device 240, and exhaust channel 260 are all activated. At this time, the gas drawn by the extraction device 210 is a mixture of fluorinated liquid vapor and air. Under the condensation effect of the condensation device 220, only the fluorinated liquid vapor is liquefied and returns to the cabinet 100 via the reflux device 240. The remaining air in the mixture does not condense and is discharged outside the cabinet 100 through the exhaust channel 260. Therefore, when the immersion phase change liquid cooling system in this embodiment is running with the cover open, the vapor recovery component 200 can recover the fluorinated liquid vapor, thereby reducing the escape of fluorinated liquid vapor and lowering the operating cost of the immersion phase change liquid cooling system.

[0042] Specifically, in this embodiment, the condensing device 220 can be a condensing coil. The structure of the condensing coil can increase the contact area with the fluorinated liquid vapor, thereby achieving a better condensation effect.

[0043] Continue to refer to Figure 1 or Figure 2 The return device 240 may include a liquid collection tank 241 and a return pipe 242. The liquid collection tank 241 is located inside the housing 250 and at the bottom of the condenser 220. One end of the return pipe 242 is connected to the liquid collection tank 241, and the other end is connected to the side plate 120. The liquid fluorinated liquid condensed by the condenser 220 can drip into the liquid collection tank 241 under the action of gravity, and then flow back into the cabinet 100 through the return pipe 242. To ensure that as much liquid fluoride as possible can flow back into the cabinet 100, the opening of the collection tank 241 can completely cover the condenser 220. Furthermore, the collection tank 241 can also be funnel-shaped, with the return pipe 242 connected to the bottom of the collection tank 241. This not only ensures that the condensed liquid fluoride falls into the collection tank 241, but also ensures that the liquid fluoride in the collection tank 241 can flow back into the cabinet 100 through the return pipe 242.

[0044] The air suction device 210 can be a fan, which is simple in structure and low in cost. In addition, the fan can be arranged in the cabinet 100, close to the side plate 120, so as to improve the air suction efficiency. For example, the condensing device 220 is a condensing coil, the flow direction of the air passing through the fan can be the same as the extension direction of the condensing pipe in the condensing coil, so as to increase the contact area between the air and the condensing coil as much as possible, thereby improving the condensing effect.

[0045] In some embodiments, with continued reference to Figure 1 or Figure 2 , the vapor recovery assembly 200 can further include an exhaust device 230, which is in communication with an exhaust passage 260. The exhaust device 230 can be regarded as an on-off valve of the exhaust passage 260. When the exhaust device 230 is in operation, the exhaust passage 260 is in communication with the outside of the housing 250, so that the air in the housing 250 can be exhausted, thereby improving the exhaust efficiency. When the exhaust device 230 is not in operation, the exhaust passage 260 is disconnected from the outside. The exhaust device 230 can be an electric exhaust valve, which is arranged outside the housing 250 and located at the top of the housing 250. The electric exhaust valve can be in communication with the exhaust passage 260 through an exhaust pipe, so as to exhaust the air in the mixed gas out of the cabinet 100.

[0046] Based on this, in some embodiments, with reference to Figure 1 and Figure 2 , the immersion phase change liquid cooling system further includes a detection device 600, which can be used to detect whether the top cover 130 is in the first position or the second position. In specific implementation, the detection device 600 can include a pressure-sensitive sensor 610, which is arranged on the inner wall of the side plate 120, close to the top cover 130. When the top cover 130 is in the first position, the pressure-sensitive sensor 610 is pressed against the top cover 130, so that the top cover 130 generates a certain pressure on the pressure-sensitive sensor 610, and the pressure-sensitive sensor 610 can detect the existence of the pressure. When the top cover 130 is in the second position, the pressure-sensitive sensor 610 is out of contact with the top cover 130, and the pressure-sensitive sensor 610 cannot detect the existence of the pressure. Therefore, by arranging the pressure-sensitive sensor 610, it can be used to detect whether the immersion phase change liquid cooling system in this embodiment is in normal operation or open-cover operation.

[0047] Further, the pressure-sensitive sensor 610 can be signal-connected with the electric exhaust valve. When the pressure-sensitive sensor 610 can detect the pressure, the electric exhaust valve is not in operation. When the pressure-sensitive sensor 610 cannot detect the pressure, it indicates that the top cover 130 is opened, and the electric exhaust valve is in operation, so as to reduce the escape of the fluorinated liquid.

[0048] With continued reference to Figure 1, the first heat exchange device 300 is used for heat exchange of the condensed liquid in the condensing device 220, and is used for reducing the temperature of the condensed liquid, so that the condensed liquid is always kept at a temperature capable of liquefying the fluorinated liquid vapor. Exemplarily, taking the condensing device 220 as a condensing coil, two ends of the condensing coil are respectively provided with a first liquid inlet (not shown in the figure) and a first liquid outlet (not shown in the figure), the first liquid outlet is connected with the first heat exchange device 300 through a first circulating heat exchange pipeline 21, and the first liquid inlet is connected with the first heat exchange device 300 through a second circulating heat exchange pipeline 22. Meanwhile, the first circulating heat exchange pipeline 21 or the second circulating heat exchange pipeline 22 is also provided with a first circulating pump 23. Under the action of the first circulating pump 23, when the condensed liquid in the condensing coil enters the first heat exchange device 300 through the first circulating heat exchange pipeline 21, the first heat exchange device 300 has a cooling medium, the condensed liquid is subjected to heat exchange of the cooling medium, and then returns to the condensing coil through the second circulating heat exchange pipeline 22, so as to complete the temperature reduction of the condensed liquid in the condensing coil.

[0049] or, referring to Figure 1 and Figure 3 , still taking the condensing device 220 as a condensing coil, a circulating pipeline 700 is embedded in the condensing coil, the circulating pipeline 700 is arranged along the extension direction of the condensing coil, one end of the circulating pipeline 700 is connected with the first heat exchange device 300 through the first circulating heat exchange pipeline 21, and the other end of the circulating pipeline 700 is connected with the first heat exchange device 300 through the second circulating heat exchange pipeline 22. Meanwhile, the first circulating heat exchange pipeline 21 or the second circulating heat exchange pipeline 22 is also provided with the first circulating pump 23. Under the action of the first circulating pump 23, the cooling medium (for example, cooling water) circulates in the circulating pipeline 700. After the cooling water is subjected to heat exchange of the condensed liquid, the cooling water flows to the first heat exchange device 300, is subjected to heat exchange of the cooling medium of the first heat exchange device 300, and then flows back to the circulating pipeline 700, so as to continuously perform heat exchange on the condensed liquid.

[0050] continue to refer to Figure 1 , the cold source device 500 is used for providing the cooling medium for the first heat exchange device 300. Specifically, the first heat exchange device 300 can be communicated with the cold source device 500 through a first liquid inlet pipeline 31 and a first liquid outlet pipeline 32, wherein the first liquid inlet pipeline 31 is provided with a pump body 40. After the cooling medium in the first heat exchange device 300 is subjected to heat exchange of the condensed liquid in the condensing coil or the cooling water in the circulating pipeline 700, the cooling medium can flow to the cold source device 500 through the first liquid inlet pipeline 31. The cold source device 500 can process the high-temperature cooling medium, for example, dissipate the heat of the high-temperature cooling medium to the atmosphere. The cold source device 500 can also flow the stored low-temperature cooling medium back to the first heat exchange device 300 through the first liquid outlet pipeline 32, so as to ensure that the cooling medium in the first heat exchange device 300 is always in a low-temperature state.

[0051] With reference to the foregoing Figure 1 The second heat exchange device 400 is used to exchange heat with the cooling liquid in the cabinet 100. It can be understood that the second heat exchange device 400 is used to directly exchange heat with the cooling liquid when the cooling liquid is in a liquid state, so as to reduce the temperature of the cooling liquid in the cabinet 100. Thus, the second heat exchange device 400 and the steam recovery assembly 200 can be regarded as two different ways of exchanging heat with the cooling liquid in the cabinet 100.

[0052] In a specific implementation, the cabinet 100 can be connected with the second heat exchange device 400 through two circulating heat exchange pipelines to exchange heat with the cooling liquid. Specifically, the side plate 120 is provided with a second liquid inlet (not shown in the figure) and a second liquid outlet (not shown in the figure) at positions corresponding to the liquid phase layer. The two circulating heat exchange pipelines include a third circulating heat exchange pipeline 51 and a fourth circulating heat exchange pipeline 52. The second liquid outlet is connected with the second heat exchange device 400 through the third circulating heat exchange pipeline 51, and the second liquid inlet is connected through the fourth circulating heat exchange pipeline 52. Meanwhile, the third circulating heat exchange pipeline 51 or the fourth circulating heat exchange pipeline 52 is provided with a second circulating pump 53.

[0053] When the second heat exchange device 400 is used to exchange heat with the cooling liquid, the cooling liquid in the cabinet 100 flows into the third circulating heat exchange pipeline 51 from the second liquid outlet under the action of the second circulating pump 53, and then flows to the second heat exchange device 400. The second heat exchange device 400 has a cooling medium, which can exchange heat with the cooling liquid. The cooled cooling liquid flows to the second liquid inlet through the fourth circulating heat exchange pipeline 52, and finally flows into the cabinet 100. Such a cycle can realize direct heat exchange of the cooling liquid by the second heat exchange device 400.

[0054] The fourth circulating heat exchange pipeline 52 can be arranged at a position close to the bottom of the cabinet 100, and the third circulating heat exchange pipeline 51 can be arranged above the fourth circulating heat exchange pipeline 52. At this time, the return pipe 242 can be connected to the third circulating heat exchange pipeline 51. When neither the on-off valve nor the second circulating pump 53 is opened, the second heat exchange device 400 does not work, and the liquid fluorinated liquid in the liquid collecting tank 241 can flow back to the cabinet 100 through the third circulating heat exchange pipeline 51. When both the on-off valve and the second circulating pump 53 are opened, the second heat exchange device 400 starts to work, and the liquid fluorinated liquid in the liquid collecting tank 241 can flow to the second heat exchange device 400 together with the liquid fluorinated liquid flowing out of the cabinet 100. After heat exchange, the liquid fluorinated liquid flows back to the cabinet 100.

[0055] Of course, the return pipe 242 can also be connected to the fourth circulating heat exchange pipeline 52. At this time, the liquid cooling liquid in the liquid collecting tank 241 does not pass through the second heat exchange device 400, but flows back to the cabinet 100 together with the fourth circulating heat exchange pipeline 52.

[0056] In the embodiment, the cold source device 500 can also be used to provide cooling medium to the second heat exchange device 400, so as to ensure that the cooling medium in the second heat exchange device 400 always keeps in a low temperature state in the process of heat exchange with the cooling liquid. Exemplarily, the second heat exchange device 400 can be in communication with the cold source device 500 through the second liquid inlet pipeline 61 and the second liquid outlet pipeline 62, the cooling medium in the second heat exchange device 400 after completing heat exchange with the cooling liquid flows to the cold source device 500 through the second liquid inlet pipeline 61, and the cold source device 500 flows the cooling medium at low temperature back to the second heat exchange device 400 through the second liquid outlet pipeline 62.

[0057] It is worth noting that the second liquid inlet pipeline 61 can be in communication with the position between the first heat exchange device 300 and the pump body 40 of the first liquid inlet pipeline 31, at this time, the pump body 40 can act on the first liquid inlet pipeline 31 and the second liquid inlet pipeline 61 at the same time, so as to reduce the number of pumps, facilitate the simplification of structure, and reduce the risk of liquid leakage caused by the setting of pump structure.

[0058] In addition, the second liquid outlet pipeline 62 is connected to the first liquid outlet pipeline 32, and the second liquid outlet pipeline 62 is provided with a switch valve 63. When the switch valve 63 is opened, the second heat exchange device 400 starts to work, and when the switch valve 63 is closed, the second heat exchange device 400 stops to work. In order to facilitate the control of the working state of the switch valve 63, exemplarily, the switch valve 63 can be an electric switch valve.

[0059] As an optional embodiment, the first heat exchange device 300 can be a plate heat exchanger, and the second heat exchange device 400 can also be a plate heat exchanger. The cooling medium in the first heat exchange device 300 can be cooling water, and the cooling medium in the second heat exchange device 400 can also be cooling water. Alternatively, as another optional embodiment, the first heat exchange device 300 and the second heat exchange device 400 can also be dry coolers, respectively.

[0060] Based on the introduction in the foregoing embodiment, the immersion phase change liquid cooling system in the embodiment can include the following working modes. It should be noted that mode one is the state that the top cover 130 covers the side plate 120, and modes two and three are the state that the top cover 130 is opened.

[0061] Mode one: refer to Figure 1 , the system normally operates, the first circulating pump 23 and the pump body 40 normally work, the air extraction device 210, the air exhaust device 230, the switch valve 63 and the second circulating pump 53 are closed. The fluorinated liquid in the cabinet 100 is heated and evaporated, the fluorinated liquid vapor drops into the liquid collecting groove 241 under the condensation of the condensing device 220, and then returns to the cabinet 100 through the return pipeline 242, so as to complete the heat exchange cycle of the fluorinated liquid.

[0062] Mode two: reference Figure 2 , the supercooling control is started, the second circulating pump 53 and the pump body 40 are started, the liquid fluorinated liquid in the cabinet 100 flows from the cabinet 100 to the second heat exchange device 400 under the action of the second circulating pump 53, and heat exchange is carried out in the second heat exchange device 400, and the cooled liquid fluorinated liquid returns to the inside of the cabinet 100. At the same time in this process, the switch valve 63 is opened, so that the cold source device 500 can exchange heat with the second heat exchange device 400, and the heat of the fluorinated liquid is taken away by the cooling medium in the cold source device 500.

[0063] Mode three: reference Figure 2 , the vapor recovery control is started, the suction device 210 and the exhaust device 230, the second circulating pump 53 and the pump body 40 are started, the mixed gas in the gas phase layer in the cabinet 100 is sucked to the condensing device 220 for condensation heat exchange, and the fluorinated liquid condenses and drops into the liquid collecting tank 241. The fluorinated liquid in the liquid collecting tank 241 flows to the second heat exchange device 400 through the third circulating heat exchange pipeline 51 for heat exchange and supercooling, and the air in the mixed gas is discharged to the atmosphere through the exhaust device 230.

[0064] It is worth noting that in the above three modes, the first circulating pump 23 and the pump body 40 are always started, that is, the condensing device 220 can always be used for condensing the fluorinated liquid vapor, and in this process, the cold source device 500 continuously provides cooling medium to the first heat exchange device 300.

[0065] In addition, when the immersion phase change liquid cooling system is in the working state of mode two or mode three, the second circulating pump 53 and the switch valve 63 are opened, at this time, the frequency of the first circulating pump 23 can be raised to the highest. When the frequency of the first circulating pump 23 is raised to the highest, the heat exchange efficiency of the first heat exchange device 300 for the condensing device 220 is improved, so that the temperature of the condensed liquid in the condensing device 220 can be reduced. For example, the condensing temperature of the condensing device 220 in mode one is 47℃, which is just the phase change temperature of the fluorinated liquid, so the condensing temperature of the condensing device 220 in mode two and mode three can be reduced to a temperature lower than 47℃. When the fluorinated liquid vapor mixed with air flows to the condensing device 220, the lower temperature of the condensed liquid can improve the condensation effect of the fluorinated liquid vapor, so as to enhance the separation effect of the fluorinated liquid vapor and the air, so that as much fluorinated liquid vapor as possible can be condensed and liquefied.

[0066] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. An immersion phase change liquid cooling system, characterized in that, Includes cabinets and steam recovery components; The cabinet includes a base plate, side plates, and a top cover. The base plate, side plates, and top cover are connected in sequence to form an accommodating space, which is used to fill coolant. The steam recovery assembly is located on the side plate near the top cover, and the steam recovery assembly includes an extraction device, a condensation device, a return device, and an exhaust channel. The extraction device is used to extract the gas in the accommodating space, the condensation device is used to condense the gaseous coolant in the gas, and the reflux device is used to return the condensed liquid coolant to the accommodating space. The exhaust passage can be selectively opened or closed. When the exhaust passage is open, it is used to discharge air from the gas that has passed through the condensation device but has not been condensed outside the cabinet.

2. The immersion phase change liquid cooling system according to claim 1, characterized in that, The top cover and the side plate have a first station and a second station; When the top cover is in the first working position, the top cover closes to the side plate; When the top cover is in the second working position, at least a portion of the top cover is detached from the side plate to allow the accommodating space to communicate with the outside. The immersion phase change liquid cooling system also includes a detection device for detecting whether the top cover is in the first position or the second position.

3. The immersion phase change liquid cooling system according to claim 2, characterized in that, The detection device includes a pressure-sensitive sensor, which is disposed on the inner wall of the side plate; When the top cover is in the first working position, the top cover is pressed against the pressure sensor; when the top cover is in the second working position, the top cover is disengaged from the pressure sensor.

4. The immersion phase change liquid cooling system according to claim 2, characterized in that, The steam recovery assembly also includes an exhaust device, which is connected to the exhaust passage and includes an electric exhaust valve.

5. The immersion phase change liquid cooling system according to claim 1, characterized in that, The reflux device includes a liquid collection tank and a reflux pipe. The liquid collection tank is located at the bottom of the condensation device. One end of the reflux pipe is connected to the liquid collection tank, and the other end of the reflux pipe is connected to the accommodating space.

6. The immersion phase change liquid cooling system according to claim 5, characterized in that, It also includes a first heat exchange device and a cold source device. The first heat exchange device is used to exchange heat with the condensed liquid in the condensation device, and the cold source device is used to provide a cooling medium to the first heat exchange device.

7. The immersion phase change liquid cooling system according to claim 6, characterized in that, It also includes a second heat exchange device, which is used to exchange heat with the coolant in the accommodating space, and the cold source device is also used to provide a cooling medium to the second heat exchange device.

8. The immersion phase change liquid cooling system according to claim 7, characterized in that, The first heat exchange device is connected to the cold source device through a first liquid inlet pipe and a first liquid outlet pipe, and the first liquid inlet pipe is equipped with a pump body; The second heat exchange device is connected to the cold source device through a second liquid inlet pipe and a second liquid outlet pipe. The second liquid inlet pipe is connected to the first liquid inlet pipe at the position between the first heat exchange device and the pump body, and the second liquid outlet pipe is connected to the first liquid outlet pipe.

9. The immersion phase change liquid cooling system according to claim 8, characterized in that, The second liquid outlet line is equipped with a switch valve.

10. The immersion phase change liquid cooling system according to claim 7, characterized in that, The cabinet is connected to the second heat exchange device via two circulating heat exchange pipelines, and the reflux device is connected to one of the circulating heat exchange pipelines.

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