Liquid cooling unit and cabinet

Abstract

The application discloses a liquid cooling unit and a cabinet, wherein the liquid cooling unit comprises a heat exchange device and a cooling liquid conveying element. The liquid cooling unit is provided with two heat exchangers arranged at an included angle. The two heat exchangers intersect with each other at one end along a horizontal first direction and are away from each other at the other end to form an opening. The outer side surfaces of the two heat exchangers cooperate with the cavity walls of the accommodating cavities to form an accommodating space. Each heat exchanger extends along a vertical direction and is sequentially provided with a heat exchange part and a liquid supplementing part from bottom to top. The heat exchange unit is provided with a liquid supply port and a liquid return port in the accommodating space. The liquid supplementing unit is provided with a liquid outlet port in the accommodating space. The cooling liquid conveying element is arranged in the accommodating space and is lower than the liquid outlet port. The cooling liquid conveying element is further provided with a liquid supplementing port communicated with the liquid outlet port, so that the liquid supplementing part is adapted to supplement the cooling liquid to the liquid supplementing port under the action of gravity. The application has the advantages of simple structure, small volume, low cost, automatic liquid supplementing in the case of liquid shortage, simple liquid supplementing operation, convenient installation and maintenance, and high heat exchange efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling, in particular to a liquid cooling unit and cabinet. BACKGROUND

[0002] The heat exchange capacity of the liquid cooling system is strong, and it is widely used in many fields. For the cooling liquid circulation, the cooling liquid will inevitably evaporate and leak over time, and there will be some gas remaining during vacuum extraction. In order to ensure the cooling effect, it is necessary to remove gas and supplement liquid in time. Therefore, a water tank, a water supplement pump and a one-way valve are arranged in the liquid cooling system to supplement liquid to the pipeline. The existing liquid cooling system has the disadvantages of complex structure, large volume, large weight and high cost, which leads to low power density, complex system maintenance, regular maintenance of the liquid supplement pump, and frequent liquid supplement operation of the liquid supplement tank with insufficient capacity. The liquid supplement signal usually comes from the system low pressure alarm, and then the liquid supplement pump will perform liquid supplement operation. However, after the system runs for a long time, there will be dirty blockage, such as dirt in the filter, which will cause the pressure drop of the filter to increase, resulting in a high system pressure and detection error. That is, even if the system is short of liquid, it may not report a low pressure alarm, so automatic liquid supplement cannot be realized. Moreover, the internal space of the system is limited, and the liquid inlet of the water tank is in the internal system, which is difficult to operate liquid supplement.

[0003] In addition, in the conventional heat exchange device, the two heat exchangers are V-shaped and open upward, the fan is placed above the area between the two heat exchangers, the heat exchangers are inclined relative to the vertical direction, and the cooling liquid flow channel, pump and other components are mostly placed on the outer side of the two heat exchangers and mostly placed in the outer included angle area of the heat exchangers. However, this structure arrangement causes the cooling liquid flow channel, pump and other components to be scattered in the outer side area or end area of the two heat exchangers, which requires the operator to constantly change positions during maintenance, which is time-consuming and laborious. In addition, due to the blocking of the outer included angle area of the heat exchanger, the air intake at the bottom of the heat exchanger is greatly reduced, which greatly affects the heat exchange efficiency. SUMMARY

[0004] The present application aims to overcome the above-mentioned defects or problems in the background art, and provides a liquid cooling unit and cabinet, which has simple structure, small volume, low cost, can automatically supplement liquid when short of liquid, and has simple liquid supplement operation, convenient installation and maintenance and high heat exchange efficiency.

[0005] To achieve the above-mentioned purpose, the present application and its related embodiments adopt the following technical solutions, but are not limited to the following solutions:

[0006] The first technical solution and related embodiments relate to a liquid cooling unit for being placed in a containing cavity, characterized in that the liquid cooling unit comprises a heat exchange device provided with two heat exchangers arranged at an angle, the two heat exchangers intersect with each other at one end along a horizontal first direction and are away from each other at the other end to form an opening, and the outer sides of the two heat exchangers cooperate with the cavity wall of the containing cavity to form a containing space covering the angle region between the two heat exchangers; each heat exchanger extends along a vertical direction and is sequentially provided with a heat exchange part and a liquid supplementing part from bottom to top; the heat exchange part comprises a plurality of cooling liquid flow channels and air flow channels for heat exchange with the cooling liquid flow channels; the two heat exchange parts jointly form a heat exchange unit provided with a liquid supply port and a liquid return port in the containing space; the two liquid supplementing parts jointly form a liquid supplementing unit provided with a liquid outlet port in the containing space; and a cooling liquid conveying member is placed in the containing space below the liquid outlet port, and is connected with the liquid supply port and the liquid return port to drive the cooling liquid to flow from the liquid return port to the liquid supply port, and is further provided with a liquid supplementing port connected with the liquid outlet port, so that the liquid supplementing part is adapted to supplement the cooling liquid to the liquid supplementing port under the action of gravity.

[0007] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the liquid supply port, the liquid return port and the liquid outlet port are close to the opening end of the two heat exchangers.

[0008] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein the two liquid supplementing parts are connected in series, the liquid outlet port is formed on the end face of one of the liquid supplementing parts, one of the liquid supplementing parts is provided with an expansion cover, the expansion cover is provided with a pressure relief valve, and the distance between the highest water level of the liquid in the liquid supplementing part and the top wall of the liquid supplementing part is greater than a first value.

[0009] The fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein the heat exchange part and the liquid supplementing part are integrally formed, and the projection of the liquid supplementing part in the vertical direction in each heat exchanger covers the heat exchange part; the heat exchange device is further provided with heat dissipation fins in the air flow channels.

[0010] The fifth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein the projection of the liquid supplementing part in the vertical direction in each heat exchanger covers the heat exchange part, a heat conducting sheet is arranged between the heat exchange part and the liquid supplementing part, and the heat exchange device is further provided with heat dissipation fins in the air flow channels.

[0011] The sixth technical solution is based on the fourth or fifth technical solution, and is a preferred embodiment of the fourth or fifth technical solution, wherein the side of the accommodating cavity is provided with an air inlet opening in the horizontal direction, and the top is provided with an air outlet; the heat exchange part is alternately provided with the cooling liquid flow channel and the air flow channel in the vertical direction, each cooling liquid flow channel and each air flow channel extend in the horizontal direction; the uppermost cooling liquid flow channel is adapted to exchange heat with the liquid supplementing part, the air flow channel includes at least a first air flow channel close to the liquid supplementing part and a second air flow channel away from the liquid supplementing part, and the air flow area of the first air flow channel is smaller than that of the second air flow channel.

[0012] The seventh technical solution is based on the sixth technical solution, and is a preferred embodiment of the sixth technical solution, wherein the liquid supplementing part is provided with a heater, the cooling liquid conveying member includes a liquid cooling pipeline and a pump, the pump is connected in series with the liquid cooling pipeline to drive the cooling liquid to flow from the liquid return port to the liquid supply port, the liquid supplementing port is arranged on the liquid cooling pipeline and close to the input end of the pump, the heater is adapted to heat the liquid or air in the liquid supplementing part before the pump is started; the two ends of the heat exchange part in the length direction are respectively provided with a liquid return part and a liquid supply part extending in the vertical direction, the liquid return part is provided with a liquid return end, the liquid supply part is provided with a liquid supply end, and two heat exchange parts are connected in series, the liquid return part of one heat exchange part is located at the opening end of the two heat exchangers, and the liquid supply part of the other heat exchange part is located at the opening end of the two heat exchangers; the liquid return end of the liquid return part at the opening end of the two heat exchangers forms the liquid return port, and the liquid supply end of the liquid supply part at the opening end of the two heat exchangers forms the liquid supply port; each cooling liquid flow channel is in communication with the liquid return part and the liquid supply part.

[0013] The eighth technical solution is based on the fourth or fifth technical solution, and is a preferred embodiment of the fourth or fifth technical solution, wherein the side of the accommodating cavity is provided with an air inlet opening in the horizontal direction, and the top is provided with an air outlet; the liquid supplementing part is provided with a heater, the cooling liquid conveying member includes a liquid cooling pipeline and a pump, the pump is connected in series with the liquid cooling pipeline to drive the cooling liquid to flow from the liquid return port to the liquid supply port, the liquid supplementing port is arranged on the liquid cooling pipeline and close to the input end of the pump, the heater is adapted to heat the liquid or air in the liquid supplementing part before the pump is started; two heat exchange parts are connected in parallel, the heat exchange part is alternately provided with the cooling liquid flow channel and the air flow channel in the length direction thereof, each cooling liquid flow channel and each air flow channel extend in the vertical direction; the upper and lower ends of the heat exchanger are respectively provided with a liquid return part and a liquid supply part in communication with each cooling liquid flow channel, the liquid return part extends in the horizontal direction and is provided with a liquid return end at the end close to the opening end of the included angle of the two heat exchangers, the two liquid return ends are connected in parallel to form the liquid return port, the liquid supply part extends in the horizontal direction and is provided with a liquid supply end at the end close to the opening end of the included angle of the two heat exchangers, and the two liquid supply ends are connected in parallel to form the liquid supply port; the liquid return part is adjacent to the liquid supplementing part and adapted to exchange heat with the liquid supplementing part.

[0014] The ninth technical solution is based on the third technical solution, which is a preferred embodiment of the third technical solution. The expansion cover is arranged near the angle end of the two heat exchangers. The liquid supplementing part is provided with a visible window near the angle end of the two heat exchangers, so that the liquid level of the liquid supplementing part can be observed. The two liquid supplementing parts are further provided with an air baffle on the side close to each other, which is connected to the top wall of the accommodating cavity.

[0015] The tenth technical solution and its preferred embodiments relate to a cabinet, which comprises a cabinet body, a liquid cooling unit as described in any one of the first to ninth technical solutions, and a heat generating component. The top of the cabinet body is provided with an accommodating cavity, and a relatively closed heat dissipation cavity is further arranged below the accommodating cavity. The side of the accommodating cavity is provided with an air inlet opening in the horizontal direction, and the top is provided with an air outlet opening. The liquid cooling unit is arranged in the accommodating cavity. The heat generating component is arranged in the heat dissipation cavity and comprises a liquid cooling plate and an electrical component. The liquid cooling plate is in communication with the cooling liquid conveying member to dissipate heat for at least part of the electrical component.

[0016] From the above description of the present application and its specific embodiments, it can be seen that, compared with the prior art, the technical solution of the present application and its related embodiments have the following beneficial effects due to the use of the following technical means:

[0017] In the first technical solution and related embodiments, the two heat exchangers are arranged at an angle, one end of which intersects each other in the first direction, and the other end is away from each other to form an opening. The outer side of the two heat exchangers cooperates with the cavity wall of the accommodating cavity to form an accommodating space covering the angle region between the two heat exchangers. Therefore, the cooling liquid conveying member can be placed in the accommodating space, thereby making full use of the space formed by the two heat exchangers and the accommodating cavity. When the two heat exchangers are connected in series, the liquid supply port and the liquid return port are formed by the liquid supply end of one heat exchanger and the liquid return end of the other heat exchanger, respectively. When the two heat exchangers are connected in parallel, the liquid supply port and the liquid return port are formed by the liquid supply ends of the two heat exchangers in parallel and the liquid return ends of the two heat exchangers in parallel, respectively. When the two liquid supplementing parts are connected in series, the liquid outlet port is formed by the liquid outlet end of one liquid supplementing part. When the two liquid supplementing parts are connected in parallel, the liquid outlet port is formed by the liquid outlet ends of the two liquid supplementing parts in parallel.

[0018] Since the liquid supply port and the liquid return port are located in the accommodating space, the communication pipeline of the cooling liquid conveying member and the liquid supply port and the liquid return port is located in the accommodating space. Since the liquid outlet port is located in the accommodating space, the communication pipeline of the cooling liquid conveying member and the liquid outlet port is located in the accommodating space. The cooling liquid conveying member can also be placed in the accommodating space. Therefore, the cooling liquid conveying member will not affect the air inlet of the air passage of the heat exchanger, and the cooling liquid conveying member can be maintained on one side of the accommodating cavity. The liquid cooling unit has high heat exchange efficiency, and is easy to install and maintain. The two heat exchangers are arranged at an angle, so that each heat exchanger has a large air passage area and a small volume, further improving the heat exchange efficiency of the heat exchanger.

[0019] Each heat exchanger extends in the vertical direction and is sequentially provided with a heat exchange part and a liquid supplementing part from bottom to top, the cooling liquid conveying member is lower than the liquid outlet, so that the liquid supplementing part is located at the highest position of the liquid path to realize the automatic liquid supplementing function under the action of gravity, wherein the heat exchange part supports the liquid supplementing part by using the structure of the heat exchange part, without setting a separate support structure, thereby saving the cost and avoiding the adverse effect of the support structure at other positions on the air duct of the heat exchange part, especially, the structure of the heat exchange part in the technical solution is inclined relative to the first direction, under the condition that the length of the accommodating cavity is constant, the inclined arrangement of the heat exchange part makes it have a longer length, so that the liquid supplementing part also has a longer length, under the condition that the height of the accommodating cavity is constant, this arrangement makes it only need to slightly reduce the height of the heat exchange part to set the liquid supplementing part thereon, and the capacity of the liquid supplementing part is larger, so that there is sufficient cooling liquid in the liquid supplementing part to supplement, thereby reducing the liquid supplementing frequency of the liquid supplementing part; more preferably, the liquid supplementing part is located above the heat exchange part, so that the liquid supplementing part is located on the outside, which is convenient for liquid supplementing operation; in addition, the heat exchange part and the liquid supplementing part can also exchange heat, thereby improving the heat exchange efficiency of the heat exchange part.

[0020] It can be known that the liquid cooling unit has the advantages that it is convenient to install and maintain, the heat exchange efficiency of the heat exchange part is high, the structure is ingenious, the automatic liquid supplementing of the liquid supplementing part can be realized without setting a redundant structure, the liquid supplementing operation of the liquid supplementing part is simple and the liquid supplementing frequency is small, and the liquid supplementing part and the heat exchange part can also assist heat exchange.

[0021] In the second technical solution and related embodiments, the liquid supply port, the liquid return port and the liquid outlet are close to the opening ends of the two heat exchangers, so that the maintenance of the cooling liquid conveying member, the installation and maintenance of the liquid outlet and the liquid supplementing port connecting pipeline, and the installation and maintenance of the cooling liquid conveying member and the liquid supply port and the liquid return port are concentrated on the opening side of the two heat exchangers, thereby facilitating the installation and maintenance of the liquid cooling unit on one side.

[0022] In the third technical solution and related embodiments, the two liquid supplementing parts are connected in series, and the liquid outlet is formed on the end face of one of the liquid supplementing parts, which is convenient for installation and maintenance; one of the liquid supplementing parts is provided with an expansion cover, a pressure relief valve is arranged on the expansion cover, and the distance between the highest water level of the liquid in the liquid supplementing part and the top wall of the liquid supplementing part is greater than the first value, so that when the pipeline pressure of the cooling liquid conveying member is relatively large, the pressure of the pipeline of the cooling liquid conveying member can flow to the liquid supplementing part, the liquid level of the liquid supplementing part rises and extrudes the gas above the liquid, so that the pressure relief valve of the expansion cover is opened, that is, the pressure relief valve on the expansion cover can realize pressure relief of the pipeline of the cooling liquid conveying member, and the pipeline pressure of the cooling liquid conveying member is prevented from being too large; when the pressure of the pipeline of the cooling liquid conveying member is relatively small, the liquid supplementing part can supplement liquid to the liquid supplementing position under the action of gravity, so that the liquid supplementing part integrates the functions of the liquid supplementing tank and the expansion tank, ensures that the pipeline of the cooling liquid conveying member operates under a relatively stable pressure, and thus it is not necessary to arrange the expansion tank in the liquid cooling unit, the volume of the liquid cooling unit is reduced, and the structure of the liquid cooling unit is compact and simple. In addition, the two liquid supplementing parts are connected in series, which further increases the capacity of the liquid supplementing part and reduces the liquid supplementing frequency of the liquid supplementing part, and the operation is more simple.

[0023] In the fourth technical solution and related embodiments, when the height of the accommodating cavity is constant, the liquid supplementing part is arranged above the heat exchange part, which means that the height of the heat exchange part is reduced. Since the height of the heat exchange part is sacrificed due to the arrangement of the liquid supplementing part, the heat exchange efficiency of the heat exchange part is affected. Therefore, the heat exchange part and the liquid supplementing part are integrally formed, on the one hand, the machining is simple, and on the other hand, since the heat exchange part is generally made of a material easy to conduct heat, the above arrangement also makes the heat exchange efficiency of the heat exchange part and the liquid supplementing part good. In addition, heat dissipation fins are arranged between the air ducts to further increase the heat exchange efficiency of the heat exchange part. The projection of the liquid supplementing part along the vertical direction covers the heat exchange part, which ensures that the liquid supplementing part has a large enough volume, is convenient for machining, reduces the liquid supplementing frequency, and makes the liquid supplementing part and the heat exchange part in large-area contact, thereby further improving the heat exchange efficiency.

[0024] In the fifth technical solution and related embodiments, when the height of the accommodating cavity is constant, the liquid supplementing part is arranged above the heat exchange part, which means that the height of the heat exchange part is reduced. Since the height of the heat exchange part is sacrificed due to the arrangement of the liquid supplementing part, the heat exchange efficiency of the heat exchange part is affected. Therefore, on the one hand, heat conduction fins are arranged between the heat exchange part and the liquid supplementing part to increase the heat exchange efficiency between the heat exchange part and the liquid supplementing part, and on the other hand, heat dissipation fins are arranged in the air duct to further increase the heat exchange efficiency of the heat exchange part. The projection of the liquid supplementing part along the vertical direction covers the heat exchange part, which ensures that the liquid supplementing part has a large enough volume, thereby reducing the liquid supplementing frequency, and making the liquid supplementing part and the heat exchange part in large-area contact, thereby further improving the heat exchange efficiency.

[0025] In the sixth technical solution and related embodiments, the air inlet of the accommodating cavity is arranged on the side of the accommodating cavity, and the air outlet is arranged on the top of the accommodating cavity. The hot air density is small, so that the hot air flow discharged from the top of the accommodating cavity mainly flows upward and does not flow downward, thereby avoiding the disturbance of the hot air flow to the air inlets of the downstream electrical devices. When the air outlet is arranged on the top, in the conventional heat exchange device, the two heat exchange parts are V-shaped and open upward, the fan is arranged above the area between the two heat exchange parts, the heat exchange parts are inclined relative to the vertical direction, and the air ducts in the heat exchange parts are also inclined relative to the vertical direction. After the fan works, the air flow changes direction after passing through the air duct, and the air flow of the two heat exchange parts blows between them. Therefore, sand is easily accumulated in the inner and outer angles at the bottom of the two heat exchange parts and in the air ducts in the heat exchange parts under the action of gravity and air flow. After long-term operation, the air resistance is large, which greatly affects the heat exchange efficiency. In the present technical solution, the structure of the heat exchange part is arranged so that each air duct passes air along the horizontal direction. Therefore, the movement direction of the air flow blowing through the air duct is basically unchanged, and the resistance in the air duct is small. The accumulated sand in the air duct can be directly blown away by the air flow introduced from the air inlet. Since the opening formed by the angles of the two heat exchange parts is horizontally oriented, sand is not easily accumulated at the angles of the two heat exchange parts. At the same time, the air duct cools the cooling liquid flow channel.

[0026] Among them, the cooling liquid flow channel located at the uppermost is suitable for heat exchange with the liquid supplementing part. Therefore, the first air duct close to the liquid supplementing part can also use the heat exchange of the liquid supplementing part for heat dissipation. Therefore, the heat dissipation efficiency of the first air duct is better than that of the second air duct. On this basis, the air passing area of the first air duct is set to be smaller than that of the second air duct, so that the first air duct and the second air duct both have high heat dissipation efficiency, thereby improving the heat dissipation efficiency of the heat exchange part as a whole.

[0027] In the seventh technical solution and related embodiments, since the pressure of the input end of the pump needs to reach a certain value when the pump is running, it is difficult to start the pump when the liquid cooling unit is in a low temperature environment or before the liquid cooling unit runs, so it is necessary to increase the pressure of the input end of the pump before the liquid cooling unit runs or in a low temperature environment. In this technical solution, the distance between the highest water level of the liquid in the liquid supplementing part and the top wall thereof is greater than a first value, so that there is air above the highest water level of the liquid in the liquid supplementing part. The air in this space can exert pressure on the liquid supplementing port when heated, so that the pressure of the input end of the pump can be increased by heating the liquid in the liquid supplementing part before the pump starts. This is because the air pressure above the liquid will increase after the temperature of the liquid rises, which will push the liquid in the liquid supplementing part to flow to the liquid supplementing port. Under the pressure of gravity and hot air, the pressure of the liquid supplementing port can gradually reach the set value, thereby increasing the pressure of the entire liquid cooling pipeline, so that the pump can be normally started. Under the condition of low-pressure starting of the pump, the heater can be turned off when the pressure of the input end of the pump reaches the set value, and under the condition of low-temperature operation, the heater can be kept on to keep the pressure of the input end of the pump reaching the set value. It should be understood that when the heater heats the liquid supplementing part, the heating temperature should be controlled so that the maximum pressure generated above the liquid in the liquid supplementing part is less than the relief pressure of the relief valve of the expansion cover. It should be understood that after the liquid cooling unit is normally running, the heater generally does not heat, so the temperature of the liquid in the liquid supplementing part is basically consistent with the ambient temperature. Since the first air passage is close to the liquid supplementing part in the sixth technical solution, it can utilize the heat exchange of the liquid supplementing part (one-piece forming of the fourth technical solution or heat-conducting sheet of the fifth technical solution) for heat dissipation, so that the temperature of the cooling liquid flow channel near the first air passage is lower than that of the cooling liquid flow channel near the second air passage. By setting the air passage area of the first air passage to be smaller than the air passage area of the second air passage, the first air passage and the second air passage both have high heat dissipation efficiency, thereby improving the heat dissipation efficiency of the heat exchange part as a whole. The two heat exchange parts are connected in series, which is easy to realize water connection.

[0028] In the eighth technical solution and related embodiments, the air inlet of the accommodating cavity is arranged on the side of the accommodating cavity, and the air outlet is arranged on the top of the accommodating cavity. The hot air density is small, so that the hot air flow discharged from the top of the accommodating cavity mainly flows upward and does not flow downward, thereby avoiding the disturbance of the hot air flow to the air inlets of the downstream electrical devices. When the air outlet is arranged on the top, in a conventional heat exchange device, the two heat exchange parts are V-shaped and open upward, the fan is arranged above the area between the two heat exchange parts, the heat exchange parts are inclined relative to the vertical direction, and the air ducts in the heat exchange parts are also inclined relative to the vertical direction. After the fan works, the direction of the air flow changes after passing through the air duct, and the air flow of the two heat exchange parts blows between them. Therefore, sand is easily accumulated in the inner and outer included angles at the bottom of the two heat exchange parts and in the air ducts in the heat exchange parts under the action of gravity and air flow. After long-term operation, the air resistance is large, which greatly affects the heat exchange efficiency. In the technical solution, the structure of the heat exchange part is arranged so that the air passes through the air duct along the horizontal direction. Therefore, the direction of the air flow basically does not change when the air flow blows through the air duct, the resistance in the air duct is small, and the accumulated sand in the air duct can be directly blown away by the air flow introduced from the air inlet. Since the opening formed by the included angles of the two heat exchange parts is horizontally directed, sand is not easily accumulated at the included angles of the two heat exchange parts. At the same time, the air duct cools the cooling liquid flow channel.

[0029] Since the pressure at the input end of the pump needs to reach a certain value when the pump is running, it is difficult to start the pump when the liquid cooling unit is in a low-temperature environment, so it is necessary to increase the pressure at the input end of the pump in a low-temperature environment. In the technical solution, the pump drives the cooling liquid to flow from the liquid supply port to the liquid return port, and the temperature of the liquid return part is high. Therefore, the liquid return part can be used to heat the liquid supplement part. After the pump is normally running, if the liquid cooling unit is always running in a low-temperature environment, the heating of the liquid supplement part can be realized by heat exchange between the liquid return part and the liquid supplement part, thereby ensuring that the pressure of the liquid cooling pipeline can reach the set value when the liquid cooling unit is in a low-temperature condition, thereby ensuring the normal operation of the pump. Therefore, under this implementation condition, the heater can be turned off or the energy consumption of the heater can be reduced, thereby saving energy. Under the normal running condition after the pump is normally started, the heater generally does not heat, so the temperature of the liquid in the liquid supplement part is basically consistent with the ambient temperature. Therefore, the heat of the liquid return part can be quickly taken away through the heat exchange of the liquid supplement part, thereby compensating for the loss of heat exchange efficiency of the heat exchange part. In this scheme, the two heat exchange parts are connected in parallel, that is, the liquid return part of each heat exchanger is the hottest liquid just recovered (the temperature difference between the internal liquid of the heat exchange part and the external cold air is the largest, and the heat exchange effect is the best), and only half of the total flow of the system passes through each heat exchange part, thereby greatly reducing the flow resistance of the system. Not only does this increase the heat exchange efficiency of the heat exchange part, but it also reduces the flow resistance of the system. More preferably, the heat exchange efficiency between the liquid return part and the liquid supplement part is good.

[0030] In the ninth technical solution and related embodiments, the expansion cover is arranged close to the angle end of the two heat exchangers, on the one hand, it is convenient to add liquid by opening the expansion cover, on the other hand, the expansion cover is away from the pump, because the liquid pressure changes greatly near the position of the pump, it is easy to affect the pressure of the liquid adding part, thus, the expansion cover is away from the pump, so as to avoid the interference of the pump on the expansion cover, thereby ensuring the stable realization of the expansion function of the liquid adding part. The liquid adding part is provided with a visual window close to the angle end of the two heat exchangers, so as to observe the liquid level of the liquid adding part, and the liquid level in the liquid adding part can be observed through the visual window when adding liquid, so that the control is more accurate; the side close to each other of the two liquid adding parts is also provided with an air baffle connected with the top wall of the accommodating cavity, so as to avoid the waste of air flow caused by the air flow flowing through the gap between the heat exchange part and the top wall of the accommodating cavity, and ensure that most of the air flow blows to the heat exchange part, thereby improving the heat exchange efficiency.

[0031] In the tenth technical solution and related embodiments, the cabinet has the technical advantages of any one of the first to ninth technical solutions; wherein, the air passing cavity is located below the accommodating cavity, and the electrical components in the air passing cavity can be at least partially cooled by liquid cooling, on the one hand, the liquid cooling is more controllable than air cooling, and has high heat dissipation efficiency, on the other hand, a relatively closed structure can be formed in the air passing cavity, thereby improving the protection of the air passing cavity, wherein, the liquid cooling unit is arranged in the accommodating cavity at the top, when the liquid cooling unit is cooled by air cooling, the air inlet of the accommodating cavity is also located at the top, the air inlet is far away from the ground and thus has a low air inlet temperature, so that the heat dissipation efficiency of the liquid cooling unit is high, thereby ensuring that the electrical components have high heat dissipation efficiency; because the liquid cooling unit does not have water inlet concerns, the air outlet can be opened at the top of the cabinet, thereby avoiding the thermal flow disturbance to the downstream cabinet when multiple cabinets are used in parallel, and even if the thermal flow flows out from the side of the top of the cabinet, because the hot air has small density, it is also not easy to affect the downstream cabinet; because the liquid cooling unit is arranged at the top, the side of the cabinet is not occupied, thereby facilitating the parallel use of multiple cabinets or the side-by-side use in the horizontal direction. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0033] Figure 1 The schematic diagram of the cabinet of the embodiment 1 of the present application Figure 1 ;

[0034] Figure 2 The schematic diagram of the cabinet of the embodiment 1 of the present application Figure 2 ;

[0035] Figure 3 Schematic diagram of the cabinet of embodiment 1 of the present application Figure 3 ;

[0036] Figure 4 Top view of the heat exchange device of embodiment 1 of the present application in the accommodating cavity

[0037] Figure 5 Schematic diagram of the heat exchange device and the liquid cooling plate of embodiment 1 of the present application Figure 1 ;

[0038] Figure 6 Schematic diagram of the heat exchange device and the liquid cooling plate of embodiment 1 of the present application Figure 2 ;

[0039] Figure 7 Side view of the heat exchange device of embodiment 1 of the present application in the accommodating cavity, the third side wall of the accommodating cavity is hidden

[0040] Figure 8 Schematic diagram of the heat exchanger of embodiment 3 of the present application

[0041] Figure 9 Schematic diagram of the heat exchanger of embodiment 6 of the present application

[0042] Explanation of main reference signs:

[0043] Cabinet body 10; first side wall 11; second side wall 12; third side wall 13; fourth side wall 14; air inlet 111; air outlet 101; air extraction fan 102; first air inlet 131; second air inlet 141; support plate 15; partition plate 16; accommodating cavity 10A; heat dissipation cavity 10B; air passing cavity 10C; heat exchange device 20; heat exchanger 30; heat exchange part 31; liquid return part 311; part to be cooled 312; cooling liquid flow channel 3121; air passing channel 3122; first air passing channel 3123; second air passing channel 3124; heat dissipation fin 3125; liquid supply part 313; liquid supply port 314; liquid return port 315; liquid injection port 316; accommodating space 01; liquid supplement part 32; liquid outlet 321; visual window 322; air partition plate 323; expansion cover 33; heat conduction fin 34; pump 40; liquid cooling pipe 50; liquid supplement port 51; heat generating component 60; liquid cooling plate 61; electrical component 62. DETAILED DESCRIPTION

[0044] 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 preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of 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.

[0045] In the claims, the specification, and the drawings of the present application, terms such as "first", "second", and "third" are used merely to distinguish one element from another, and do not imply a particular order or sequence except where expressly so defined by the claims.

[0046] In the claims, the specification, and the drawings of the present application, terms such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", and the like merely indicate directions or positions based on the directions and positions shown in the drawings, and are used only to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so they cannot be understood as limiting the specific protection scope of the present application.

[0047] In the claims, the specification, and the drawings of the present application, unless otherwise expressly defined, the term "fixedly connected" or "fixedly connected" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0048] In the claims, the specification, and the drawings of the present application, the terms "include", "have" and their variants are intended to mean "include but not limited to".

[0049] Example 1

[0050] Referring to Figures 1-3 , Figures 1-3 A cabinet is shown, which includes a cabinet body 10, a liquid cooling unit and a heat generating component 60.

[0051] Referring to Figures 1-4 , the cabinet body 10 is in the shape of a rectangular parallelepiped, the cabinet body 10 is provided with a first side wall 11 and a second side wall 12 parallel and opposite to each other along a first direction, and the cabinet body 10 is provided with a third side wall 13 and a fourth side wall 14 parallel and opposite to each other along a second direction perpendicular to the first direction. The first direction is the up-down direction in Figure 4 , and the second direction is the left-right direction in Figure 4 .

[0052] In this embodiment, the cabinet body 10 is provided with a support plate 15 and a partition plate 16, referring to Figure 3The support plate 15 divides the cabinet 10 into an upper area and a lower area, the upper area forms a containing cavity 10A, the dividing plate 16 divides the lower area into a middle area and a bottom area, the middle area forms a heat dissipation cavity 10B, and the bottom area forms a wind passing cavity 10C, that is, the cabinet 10 is provided with the containing cavity 10A at the top and the wind passing cavity 10C at the bottom, and the cabinet 10 is provided with the heat dissipation cavity 10B between the containing cavity 10A and the wind passing cavity 10C, and the heat dissipation cavity 10B is relatively closed.

[0053] Referring to Figures 1-2 The containing cavity 10A is provided with an air inlet 111 on the first side wall 11 along a horizontal first direction, and is provided with an air outlet 101 at the top, and the air outlet 101 is close to the second side wall 12; the containing cavity 10A is further provided with a first air inlet 131 and a second air inlet 141 on the third side wall 13 and the fourth side wall 14 respectively.

[0054] In actual application, the air outlet 101 is provided with an exhaust fan 102.

[0055] The liquid cooling unit is arranged in the containing cavity 10A and includes a heat exchange device 20 and a cooling liquid conveying member.

[0056] Referring to Figure 4 The heat exchange device 20 is provided with two heat exchangers 30 arranged at an angle, one end of the two heat exchangers 30 along the horizontal first direction intersects with each other, and the other end is away from each other to form an opening, and the outer side surface of the two heat exchangers 30 cooperates with the cavity wall of the containing cavity 10A to form a containing space 01 covering the angle area between the two heat exchangers 30, Figure 4 The projection of the containing space 01 along the vertical direction is a pentagonal shape. Referring to Figures 5-6 Each heat exchanger 30 extends along the vertical direction and is sequentially provided with a heat exchange part 31 and a liquid supplementing part 32 from bottom to top; the heat exchange part 31 includes a plurality of cooling liquid flow channels 3121 and a wind passing channel 3122 for heat exchange with the cooling liquid flow channels 3121; the two heat exchange parts 31 jointly form a heat exchange unit, the heat exchange unit is provided with a liquid supply port 314 and a liquid return port 315 in the containing space 01, and the two liquid supplementing parts 32 jointly form a liquid supplementing unit, and the liquid supplementing unit is provided with a liquid outlet 321 in the containing space 01.

[0057] When the two heat exchange parts 31 are connected in series, the liquid supply port 314 and the liquid return port 315 are formed by the liquid supply end of one heat exchange part 31 and the liquid return end of the other heat exchange part 31 respectively, and when the two heat exchange parts 31 are connected in parallel, the liquid supply port 314 and the liquid return port 315 are formed by the liquid supply ends of the two heat exchange parts 31 in parallel and the liquid return ends of the two heat exchange parts in parallel respectively; when the two liquid supplementing parts 32 are connected in series, the liquid outlet 321 is formed by the liquid outlet end of one liquid supplementing part 32, and when the two liquid supplementing parts 32 are connected in parallel, the liquid outlet 321 is formed by the liquid outlet ends of the two liquid supplementing parts 32 in parallel.

[0058] When the height of the accommodating cavity 10A is constant, the liquid supplementing part 32 is arranged above the heat exchanging part 31, which means that the height of the heat exchanging part 31 is reduced. Since the height of the heat exchanging part 31 is reduced due to the arrangement of the liquid supplementing part 32, the heat exchanging efficiency of the heat exchanging part 31 is affected. To this end, in the embodiment, the heat conducting sheet 34 is arranged between the heat exchanging part 31 and the liquid supplementing part 32 to increase the heat exchanging efficiency between the heat exchanging part 31 and the liquid supplementing part 32. The projection of the liquid supplementing part 32 in each heat exchanger 30 in the vertical direction covers the heat exchanging part 31, so as to ensure that the liquid supplementing part 32 has a large enough volume, thereby reducing the liquid supplementing frequency and making the liquid supplementing part 32 and the heat exchanging part 31 have a large area of contact, and further improving the heat exchanging efficiency. Figures 4-7 The liquid supplementing part 32 is in the shape of a cuboid.

[0059] Specifically, the cooling liquid flow channel 3121 and the air flow channel 3122 are alternately arranged on the heat exchanging part 31 in the vertical direction, each cooling liquid flow channel 3121 and each air flow channel 3122 extend in the horizontal direction and form the to-be-cooled part 312, and the cooling liquid flow channel 3121 located at the uppermost position is adapted to exchange heat with the liquid supplementing part 32. The heat exchanging part 31 is provided with the liquid returning part 311 and the liquid supplying part 313 extending in the vertical direction at two ends in the length direction of the heat exchanging part 31, the liquid returning part 311 is provided with a liquid returning end, the liquid supplying part 313 is provided with a liquid supplying end, and each cooling liquid flow channel 3121 is in communication with the liquid returning part 311 and the liquid supplying part 313. That is, the heat exchanging part 31 is sequentially provided with the liquid returning part 311, the to-be-cooled part 312 and the liquid supplying part 313 in the length direction of the heat exchanging part 31, and the liquid supplementing part 32 is arranged above the to-be-cooled part 312. Figure 7 The heat exchanger 20 is further provided with the heat radiating fin 3125 in the air flow channel 3122 to further increase the heat exchanging efficiency.

[0060] Referring to Figures 5-6In the embodiment, the two heat exchange portions 31 are connected in series, the liquid supply end of the liquid supply portion 313 of one of the heat exchange portions 31 is connected with the liquid return end of the liquid return portion 311 of the other heat exchange portion 30 through a pipeline at the corner end of the two heat exchangers 30, thus the liquid return portion 311 of one of the heat exchange portions 31 is located at the opening end of the two heat exchangers 30, and the liquid supply portion 313 of the other heat exchange portion 31 is located at the opening end of the two heat exchangers 30; the liquid return end of the liquid return portion 311 located at the opening end of the two heat exchangers 30 forms a liquid return port 315, and the liquid supply end of the liquid supply portion 313 located at the opening end of the two heat exchangers 30 forms a liquid supply port 314, thus the liquid supply port 314 and the liquid return port 315 are both close to the opening end of the two heat exchangers 30 and are located on the end face of the corresponding heat exchange portion 31. In other embodiments, for example, when the two heat exchange portions 31 are connected in parallel, the liquid return portion 311 and the liquid supply portion 313 of each heat exchange portion 31 can be arranged close to the opening end of the two heat exchangers 30, at this time, the liquid return portion 311 and the liquid supply portion 313 are arranged in the vertical direction, thus the liquid supply end and the liquid return end of each heat exchange portion 31 are arranged close to the opening end of the two heat exchangers 30, the two liquid supply ends are connected in parallel to form the liquid supply port 314, and the two liquid return ends are connected in parallel to form the liquid return port 315. In actual application, the liquid injection port 316 is further arranged close to the corner end of each heat exchange portion 31, and the cooling liquid can be injected into or discharged from the heat exchange portion 31 through the liquid injection port 316.

[0061] Still referring to Figures 5-6 The two liquid supplement portions 32 are connected in series, and the two liquid supplement portions 32 are connected through a pipeline at the corner end of the two heat exchangers 30, the liquid outlet port 321 is formed on the end face of one of the liquid supplement portions 32, one of the liquid supplement portions 32 is provided with an expansion cover 33, the expansion cover 33 is provided with a pressure relief valve, and the distance between the highest water level of the liquid in the liquid supplement portion 32 and the top wall of the liquid supplement portion 32 is greater than the first value. The pressure relief valve can be used in the prior art, and the embodiment will not be described here. Thus, the liquid supply port 314, the liquid return port 315 and the liquid outlet port 321 are all close to the opening end of the two heat exchangers 30.

[0062] In the embodiment, preferably, the expansion cover 33 is arranged close to the corner end of the two heat exchangers 30, and the liquid supplement portion 32 is provided with a visible window 322 close to the corner end of the two heat exchangers 30, so that the liquid level of the liquid supplement portion 32 can be observed, that is, the operator can observe the water level in the liquid supplement portion 32.

[0063] In the embodiment, further preferably, the side close to each other of the two liquid supplement portions 32 is further provided with an air isolation plate 323 connected with the top wall of the accommodating cavity 10A, the height of the air isolation plate 323 should be slightly higher than that of the expansion cover 33, and the air isolation plate 323 is arranged to avoid the air flow flowing through the gap between the heat exchange portion 31 and the top wall of the accommodating cavity 10A, to cause air flow waste, and to ensure that most of the air flow blows to the heat exchange portion 31, to improve the heat exchange efficiency.

[0064] Referring toFigures 4-6 The cooling liquid delivery member is disposed in the accommodating space 01 and below the liquid outlet 321, and is in communication with the liquid supply port 314 and the liquid return port 315 to drive the cooling liquid to flow from the liquid return port 315 to the liquid supply port 314. The cooling liquid delivery member is further provided with a liquid supplement port 51 in communication with the liquid outlet 321, so that the liquid supplement part 32 is adapted to supplement the cooling liquid to the liquid supplement port 51 under the action of gravity. The liquid supplement part 32 forms a liquid supplement tank at the highest position of the liquid circuit of the liquid cooling pipeline 50. The temperature of the liquid return port 315 is higher than that of the liquid supply port 314.

[0065] In this embodiment, the cooling liquid delivery member includes the liquid cooling pipeline 50 and the pump 40. The liquid cooling pipeline 50 is provided with a liquid inlet end, a liquid outlet end and the liquid supplement port 51. The temperature of the liquid inlet end is higher than that of the liquid outlet end. The pump 40 is connected in series with the liquid cooling pipeline 50 to drive the cooling liquid to flow from the liquid inlet end to the liquid outlet end of the liquid cooling pipeline 50, so as to drive the cooling liquid to flow from the liquid return port 315 to the liquid supply port 314. The liquid supplement port 51 is disposed on the liquid cooling pipeline 50 and is close to the input end of the pump 40, so that the pump 40 is adapted to drive the cooling liquid to flow from the liquid inlet end, the liquid return port 315 and the liquid supply port 314 to the liquid outlet end. It should be understood that, in this embodiment, the cooling liquid delivery member means the pipeline part other than the heat exchange part 31.

[0066] In this embodiment, the pump 40 is connected in series between the liquid inlet end of the liquid cooling pipeline 50 and the liquid return port 315 of one of the heat exchange parts 31. The liquid supply port 314 of the other heat exchange part 31 is in communication with the liquid outlet end of the liquid cooling pipeline 50.

[0067] The forming of the accommodation space 01 in the embodiment enables the cooling liquid conveying member to be placed in the accommodation space 01, so that the space formed between the two heat exchangers 30 and the accommodation cavity 10A is fully utilized. Since the liquid supply port 314 and the liquid return port 315 are located in the accommodation space 01, the communication pipeline of the cooling liquid conveying member and the liquid supply port 314 and the liquid return port 315 is located in the accommodation space 01. Since the liquid outlet port 321 is located in the accommodation space 01, the communication pipeline of the cooling liquid conveying member and the liquid outlet port 321 is in the accommodation space 01. The cooling liquid conveying member can also be placed in the accommodation space 01, and the cooling liquid conveying member will not affect the air inlet of the air passage 3122 of the heat exchange part 31, and the cooling liquid conveying member can be maintained on one side of the accommodation cavity 10A, so that the liquid cooling unit has high heat exchange efficiency and is easy to install and maintain. The two heat exchange parts 31 are arranged at an angle, and the heat exchange part 31 also has a large air passage area and a small volume, which further improves the heat exchange efficiency of the heat exchange part 31. The liquid supply port 314 and the liquid return port 315 are close to the open ends of the two heat exchangers 30 and are located on the end faces of the corresponding heat exchange parts 31. The liquid outlet port 321 is close to the open ends of the two heat exchangers 30 and is located on the end face of the liquid supplement part 32, so that the maintenance of the cooling liquid conveying member, the installation and maintenance of the communication pipeline of the liquid outlet port 321 and the liquid supplement port 51, and the installation and maintenance of the cooling liquid conveying member and the liquid supply port 314 and the liquid return port 315 are concentrated on the open side of the two heat exchangers 30, which is convenient for installing and maintaining the liquid cooling unit on one side.

[0068] In the technical solution, each heat exchanger 30 extends along the vertical direction and is sequentially provided with a heat exchange part 31 and a liquid supplement part 32 from bottom to top. The cooling liquid conveying member is lower than the liquid outlet port 321, so that the liquid supplement part 32 is located at the highest position of the liquid path to realize the automatic liquid supplement function to the liquid supplement port 51 under the action of gravity. The structure of the heat exchange part 31 is used to support the liquid supplement part 32, without the need to set a separate support structure, thereby saving the cost and avoiding the adverse effect of the support structure at other positions on the air passage 3122 of the heat exchange part 31. In particular, the structure of the heat exchange part 31 in the technical solution is inclined relative to the first direction. Under the condition that the length of the accommodation cavity 10A is constant, the inclined arrangement of the heat exchange part 31 makes it have a longer length, so that the liquid supplement part 32 also has a longer length. Under the condition that the height of the accommodation cavity 10A is constant, this arrangement makes it only need to slightly reduce the height of the heat exchange part 31 to set the liquid supplement part 32 thereon, and the capacity of the liquid supplement part 32 is larger, so that there is sufficient cooling liquid in the liquid supplement part 32 to reduce the liquid supplement frequency of the liquid supplement part 32. More preferably, the liquid supplement part 32 is located above the heat exchange part 31, so that the liquid supplement port of the liquid supplement part 32 is located on the outside, which is convenient for liquid supplement operation. In addition, heat exchange can be performed between the heat exchange part 31 and the liquid supplement part 32, thereby improving the heat exchange efficiency of the heat exchange part 31.

[0069] In the embodiment, when the pipeline pressure of the cooling liquid conveying member is relatively large, the pressure of the pipeline of the cooling liquid conveying member can flow to the liquid supplementing part 32, the liquid level of the liquid supplementing part 32 rises and extrudes the gas above the liquid, so that the pressure relief valve of the expansion cover 33 is opened, that is, the pressure relief valve on the expansion cover 33 can realize pressure relief of the pipeline of the cooling liquid conveying member, preventing the pipeline pressure of the cooling liquid conveying member from being too large, when the pipeline pressure of the cooling liquid conveying member is relatively small, the liquid supplementing part 32 can supplement liquid to the liquid supplementing position under the action of gravity, so that the liquid supplementing part 32 integrates the functions of the liquid supplementing tank and the expansion tank, ensuring that the pipeline of the cooling liquid conveying member operates under a relatively stable pressure, so that it is not necessary to set the expansion tank in the liquid cooling unit, reducing the volume of the liquid cooling unit, making the structure of the liquid cooling unit compact and simple. The two liquid supplementing parts 32 are connected in series, further increasing the capacity of the liquid supplementing part 32 and reducing the liquid supplementing frequency of the liquid supplementing part 32, and the operation is simpler.

[0070] In the embodiment, the expansion cover 33 is arranged near the angle end of the two heat exchangers 30, on the one hand, it is convenient to supplement liquid by opening the expansion cover 33, on the other hand, the expansion cover 33 is away from the pump 40, because the liquid pressure changes greatly near the position of the pump 40, which can easily affect the pressure of the liquid supplementing part 32, so that the expansion cover 33 is away from the pump 40, which can avoid the interference of the pump 40 on the expansion cover 33, thereby ensuring the stable realization of the expansion function of the liquid supplementing part 32.

[0071] In this embodiment, the air inlet 111 of the accommodating cavity 10A is arranged on the side of the accommodating cavity 10A, and the air outlet 101 is arranged on the top of the accommodating cavity 10A. The hot air density is small, so that the hot air flow discharged from the top of the accommodating cavity 10A mainly flows upwards and does not flow downwards, thereby avoiding the disturbance of the hot air flow to the air inlets 111 of the downstream electrical devices. When the air outlet 101 is arranged on the top, in the conventional heat exchange device 20, the two heat exchange parts 31 are V-shaped and open upwards, the fan is arranged above the area between the two heat exchange parts 31, the heat exchange parts 31 are inclined relative to the vertical direction, and the air duct in the heat exchange part 31 is also inclined relative to the vertical direction. After the fan works, the air flow changes the movement direction after passing through the air duct 3122, and the air flow of the two heat exchange parts 31 blows between them. Therefore, sand is easy to accumulate in the inner and outer included angles at the bottom of the two heat exchange parts 31 and in the air duct in the heat exchange part 31 under the action of gravity and air flow. After long-term operation, the air resistance is large, which greatly affects the heat exchange efficiency. In the technical solution, the structure of the heat exchange part 31 is arranged so that each air duct 3122 passes air along the horizontal direction. Therefore, the movement direction of the air flow blowing through the air duct 3122 is basically unchanged, the resistance in the air duct 3122 is small, and the air flow introduced from the air inlet 111 can directly blow away the accumulated sand in the air duct 3122. Since the opening formed by the included angles of the two heat exchange parts 31 is horizontally directed, sand is not easy to accumulate at the included angles of the two heat exchange parts 31. At the same time, the air duct 3122 cools the cooling liquid flow channel 3121. The exhaust fan 102 is arranged at the air outlet 101 to drive the air flow to flow from the air inlet 111, the first air inlet 131, the second air inlet 141 to the air outlet 101 through the air duct 3122. Figure 4 In this embodiment, the projection of the exhaust fan 102 along the vertical direction is spaced apart from the two heat exchangers 30 along the first direction, which ensures that the air flow completely flows through the air duct 3122 of the heat exchanger 30. The arrangement of the first air inlet 131 and the second air inlet 141 facilitates faster removal of heat from the cooling liquid flow channel of the two heat exchangers 30, thereby improving the heat exchange efficiency of the heat exchanger 30.

[0072] Referring to Figure 3 The heat generating assembly 60 is arranged in the air duct cavity and includes a liquid cooling plate 61 and an electrical assembly 62. The liquid cooling plate 61 is in communication with the cooling liquid conveying member to dissipate heat for at least part of the electrical assembly 62.

[0073] The heat dissipation cavity 10B is located below the accommodating cavity 10A. The electrical components 62 in the heat dissipation cavity 10B can be at least partially cooled by liquid cooling. On the one hand, liquid cooling is easier to control and has high cooling efficiency compared to air cooling. On the other hand, the heat dissipation cavity 10B can form a relatively closed structure, thereby improving the protection of the heat dissipation cavity 10B. The liquid cooling unit is arranged in the accommodating cavity 10A at the top. When the liquid cooling unit is cooled by air cooling, the air inlet 111 of the accommodating cavity 10A is also located at the top. The air inlet 111 is far away from the ground and thus has a low air inlet temperature, so that the cooling efficiency of the liquid cooling unit is high, thereby ensuring that the electrical components 62 have high cooling efficiency. Since the liquid cooling unit does not have water inlet concerns, the air outlet 101 can be provided on the top of the cabinet 10, thereby reducing the heat flow disturbance to the downstream cabinet when multiple cabinets are used in parallel. Even if the heat flow flows out from the side of the top of the cabinet 10, the hot air has a small density and is not easy to affect the downstream cabinet. Since the liquid cooling unit is arranged at the top, the side of the cabinet 10 is not occupied, thereby facilitating the parallel use of multiple cabinets or the side-by-side use in the horizontal direction. The side walls of the cabinet 10 other than the first side wall 11 and the second side wall 12, i.e., the third side wall 13 and the fourth side wall 14, do not need air inlet and outlet, and do not need maintenance, thereby allowing the side walls to be used for parallel cabinets with other cabinets 10 without affecting the operation, cooling and maintenance of the cabinet itself. When multiple cabinets are used in parallel in the second direction, only the first air inlet 131 and the second air inlet 141 of the outermost cabinet can be air inlets. Due to the air pressure, the first air inlet 131 and the second air inlet 141 of the cabinet located in the middle cannot be air inlets.

[0074] Embodiment 2

[0075] Embodiment 2 is basically the same as embodiment 1, except that the heat exchange part 31 and the liquid supplementing part 32 are integrally formed, and there is no heat conducting sheet 34 between the heat exchange part 31 and the liquid supplementing part 32. Integrally forming the heat exchange part 31 and the liquid supplementing part 32 is simpler to process, and on the other hand, since the heat exchange part 31 is generally made of a material that easily conducts heat, the above arrangement also makes the heat exchange efficiency of the heat exchange part 31 and the liquid supplementing part 32 good.

[0076] Embodiment 3

[0077] Embodiment 3 is basically the same as embodiment 1, except that, as shown in Figure 8 , the air passage 3122 at least includes a first air passage 3123 close to the liquid supplementing part 32 and a second air passage 3124 away from the liquid supplementing part 32, and the air passage area of the first air passage 3123 is smaller than that of the second air passage 3124. In other embodiments, the air passage area of the air passage 3122 can also gradually increase in the direction away from the liquid supplementing part 32.

[0078] The uppermost cooling liquid flow channel 3121 is adapted to exchange heat with the liquid supplementing portion 32, and thus the first air flow channel 3123 close to the liquid supplementing portion 32 can also dissipate heat by using the heat exchange of the liquid supplementing portion 32, and thus the heat dissipation efficiency of the first air flow channel 3123 is superior to that of the second air flow channel 3124. On this basis, the air flow area of the first air flow channel 3123 is set to be smaller than that of the second air flow channel 3124, so that the first air flow channel 3123 and the second air flow channel 3124 both have high heat dissipation efficiency, thereby improving the heat dissipation efficiency of the heat exchange portion 31 as a whole. In actual application, the two heat exchange portions 31 are mirror-symmetrical about a plane parallel to the first direction and the vertical direction.

[0079] Embodiment 4

[0080] Embodiment 4 is basically the same as Embodiment 3, except that a heater (not shown in the figure) is arranged in the liquid supplementing portion 32, and the input end of the pump 40 is provided with a pressure sensor, and the heater is adapted to heat the liquid or air in the liquid supplementing portion 32 until the pressure value detected by the pressure sensor reaches the set value when the pressure value is less than the set value. In this embodiment, the heater mainly heats the liquid in the liquid supplementing portion 32.

[0081] In actual application, the heater includes a controller and a heating sheet, and the heating sheet can be arranged at the bottom of the liquid supplementing portion 32, and the controller controls the heating of the heating sheet according to the change of the pressure sensor. In other embodiments, a manual switch can also be arranged to control the heating of the heater.

[0082] Since the pressure at the input end of the pump 40 needs to reach a certain value when the pump 40 is running, it is difficult to start the pump 40 when the liquid cooling unit is in a low-temperature environment or before the liquid cooling unit is running, and thus it is necessary to increase the pressure at the input end of the pump 40 in a low-temperature environment or before the liquid cooling unit is running. In this technical solution, the distance between the highest water level of the liquid in the liquid supplementing portion 32 and the top wall thereof is greater than a first value, and thus there is air above the highest water level of the liquid in the liquid supplementing portion 32. The air in this space can exert pressure on the liquid supplementing port 51 when heated, and thus the pressure at the input end of the pump 40 can be increased by heating the liquid in the liquid supplementing portion 32 before the pump 40 is started. This is because the air pressure above the liquid will increase after the temperature of the liquid rises, and this air pressure will push the liquid in the liquid supplementing portion 32 to flow to the liquid supplementing port 51. Under the action of gravity and the pressure of the hot air, the pressure of the liquid supplementing port 51 can gradually reach the set value, thereby increasing the pressure of the entire liquid cooling pipeline 50, and thus the pump 40 can be normally started.

[0083] Under the condition of low-pressure starting of the pump 40, the heater can be turned off when the pressure at the input end of the pump 40 reaches the set value, and under the condition of low-temperature running, the heater can be kept on to keep the pressure at the input end of the pump 40 reaching the set value.

[0084] It should be understood that when the heater heats the liquid supplementing portion 32, the heating temperature should be controlled so that the maximum pressure generated above the liquid in the liquid supplementing portion 32 is less than the expansion pressure at which the pressure relief valve of the expansion cover 33 opens.

[0085] It should be understood that after the liquid cooling unit is normally operated, the heater generally does not heat, and thus the temperature of the liquid in the liquid supplementing portion 32 is basically consistent with the ambient temperature. Since the first overpass 3123 is close to the liquid supplementing portion 32, it can dissipate heat by using the heat exchange of the liquid supplementing portion 32.

[0086] Embodiment 5

[0087] Embodiment 5 is basically the same as Embodiment 4, except that the heat exchange portion 31 and the liquid supplementing portion 32 are integrally formed, and there is no heat conducting sheet 34 between the heat exchange portion 31 and the liquid supplementing portion 32. Integrally forming the heat exchange portion 31 and the liquid supplementing portion 32 is simpler to process, and on the other hand, since the heat exchange portion 31 is generally made of a material easy to conduct heat, the above arrangement also makes the heat exchange efficiency of the heat exchange portion 31 and the liquid supplementing portion 32 good.

[0088] Embodiment 6

[0089] Embodiment 6 is basically the same as Embodiment 4, please refer to Figure 9 , except that two heat exchange portions 31 are connected in parallel, the structure of the heat exchange portion 31 is different, the heat exchange portion 31 is sequentially provided with a liquid returning portion 311, a to-be-cooled portion 312 and a liquid supplying portion 313 from top to bottom, and the heat exchange portion 31 is alternately provided with a cooling liquid flow channel 3121 and an overpass 3122 along the length direction thereof, each cooling liquid flow channel and each overpass 3122 extend along the vertical direction and form the to-be-cooled portion 312; the upper and lower ends of the heat exchanger 30 are respectively provided with the liquid returning portion 311 and the liquid supplying portion 313 which are in communication with each cooling liquid flow channel, so that the heat exchange portion 31 is sequentially provided with the liquid returning portion 311, the to-be-cooled portion 312 and the liquid supplying portion 313 from top to bottom, the liquid returning portion 311 extends along the horizontal direction and is provided with a liquid returning end at the end close to the opening end of the included angle of the two heat exchangers 30, and the two liquid returning ends are connected in parallel to form the liquid returning port 315, and the liquid supplying portion 313 extends along the horizontal direction and is provided with a liquid supplying end at the end close to the opening end of the included angle of the two heat exchangers 30, and the two liquid supplying ends are connected in parallel to form the liquid supplying port 314; the liquid returning portion 311 is adapted to exchange heat with the liquid supplementing portion 32.

[0090] Since the pressure at the input end of the pump 40 needs to reach a certain value when the pump 40 is running, when the liquid cooling unit is in a low-temperature environment, the pressure at the input end of the pump 40 is small and it is difficult to start, so it is necessary to increase the pressure at the input end of the pump 40 in a low-temperature environment. In the technical solution, since the pump 40 is suitable for delivering hot liquid to the return liquid end and recovering cold liquid from the supply end, the temperature of the return liquid part 311 is high, and the return liquid part 311 can be used to heat the liquid supply part 32. Therefore, after the pump 40 is running normally, if the liquid cooling unit is running in a low-temperature environment, the heating of the liquid supply part 32 can be realized through the heat exchange between the return liquid part 311 and the liquid supply part 32, so as to ensure that the pressure of the liquid cooling pipeline 50 can reach the set value when the liquid cooling unit is in a low-temperature condition, thereby ensuring the normal operation of the pump 40. Therefore, under this implementation condition, the heater can be turned off or the energy consumption of the heater can be reduced, thereby saving energy consumption. Under the normal running condition after the pump 40 is started normally, the heater generally does not heat, so the temperature of the liquid in the liquid supply part 32 is basically consistent with the ambient temperature, and the heat of the return liquid part 311 can be quickly taken away through the heat exchange of the liquid supply part 32, thereby compensating for the loss of heat exchange efficiency of the heat exchange part 31. In the scheme, the two heat exchange parts 31 are connected in parallel, that is, the return liquid part 311 of each heat exchanger 30 is the hottest liquid just recovered (the temperature difference between the internal liquid of the heat exchange part and the external cold air is the largest, and the heat exchange effect is the best), and at the same time, only half of the total flow of the system passes through each heat exchange part 31, which greatly reduces the flow resistance of the system, not only increases the heat exchange efficiency of the heat exchange part 31, but also reduces the flow resistance of the system, and more preferably, the heat exchange efficiency between the return liquid part 311 and the liquid supply part 32 is good.

[0091] The above description and embodiment of the application are used to explain the scope of protection of the application, but do not constitute a limitation on the scope of protection of the application. Through the inspiration of the application or the above embodiment, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiment of the application or one part of the technical features of the application by combining the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited test, which should be included in the protection scope of the application.

Claims

1. A liquid cooling unit for placement in a housing cavity (10A) characterized by, The heat exchange device (20) is provided with two heat exchangers (30) arranged at an included angle, the two heat exchangers (30) intersect each other at one end along a horizontal first direction and are away from each other at the other end to form an opening, and the outer sides of the two heat exchangers (30) cooperate with the cavity wall of the accommodating cavity (10A) to form an accommodating space (01) covering the included angle region between the two heat exchangers (30); each heat exchanger (30) extends along a vertical direction and is sequentially provided with a heat exchange part (31) and a liquid supplementing part (32) from bottom to top; the heat exchange part (31) comprises a plurality of cooling liquid flow channels (3121) and a through air channel (3122) for heat exchange with the cooling liquid flow channels (3121); the two heat exchange parts (31) jointly form a heat exchange unit, the heat exchange unit is provided with a liquid supply port (314) and a liquid return port (315) in the accommodating space (01); the two liquid supplementing parts (32) jointly form a liquid supplementing unit, the liquid supplementing unit is provided with a liquid outlet port (321) in the accommodating space (01); and A cooling liquid conveying member is arranged in the accommodating space (01) and below the liquid outlet port (321), and is connected with the liquid supply port (314) and the liquid return port (315) to drive the cooling liquid to flow from the liquid return port (315) to the liquid supply port (314), and is further provided with a liquid supplementing port (51) connected with the liquid outlet port (321) to make the liquid supplementing part (32) suitable for supplementing the cooling liquid to the liquid supplementing port (51) under the action of gravity. The side part of the accommodating cavity is provided with an air inlet port (111) opened along a horizontal direction, and the top part is provided with an air outlet port (101); the heat exchange part (31) is alternately provided with the cooling liquid flow channel (3121) and the through air channel (3122) along a vertical direction, each cooling liquid flow channel (3121) and each through air channel (3122) extend along a horizontal direction; the uppermost cooling liquid flow channel (3121) is suitable for heat exchange with the liquid supplementing part (32), the through air channel (3122) at least comprises a first through air channel (3123) close to the liquid supplementing part (32) and a second through air channel (3124) away from the liquid supplementing part (32), and the air passing area of the first through air channel (3123) is smaller than that of the second through air channel (3124). The liquid supply port (314), the liquid return port (315) and the liquid outlet port (321) are close to the opening end of the two heat exchangers (30).

2. A liquid chiller unit as set forth in claim 1 wherein, The two liquid supplementing parts (32) are connected in series, the liquid outlet port (321) is formed on the end face of one of the liquid supplementing parts (32), one of the liquid supplementing parts (32) is provided with an expansion cover (33), the expansion cover (33) is provided with a pressure relief valve, and the distance between the highest water level of the liquid in the liquid supplementing part (32) and the top wall of the liquid supplementing part (32) is greater than a first value.

3. A liquid chiller unit as set forth in claim 2 wherein, The heat exchange part (31) and the liquid supplementing part (32) are integrally formed, the projection of the liquid supplementing part (32) in each heat exchanger (30) along a vertical direction covers the heat exchange part (31); the heat exchange device (20) is further provided with a heat dissipation fin (3125) in the through air channel (3122).

4. A liquid chiller unit as set forth in claim 3 wherein, ​ 5. A liquid chiller unit as set forth in claim 3 wherein, The projection of the liquid supplementing part (32) in each heat exchanger (30) covers the heat exchanging part (31) in the vertical direction, and a heat conducting sheet (34) is arranged between the heat exchanging part (31) and the liquid supplementing part (32), and the heat exchanging device (20) is further provided with a heat radiating fin (3125) in the air passage (3122).

6. A liquid chiller unit as claimed in claim 4 or 5 wherein, The liquid supplementing part (32) is provided with a heater, the cooling liquid conveying member comprises a liquid cooling pipeline (50) and a pump (40), the pump (40) is connected in series with the liquid cooling pipeline (50) to drive the cooling liquid to flow from the liquid returning port (315) to the liquid supplying port (314), the liquid supplementing port (51) is arranged on the liquid cooling pipeline (50) and is close to the input end of the pump (40), and the heater is adapted to heat the liquid or air in the liquid supplementing part (32) before the pump (40) is started; The heat exchanging part (31) is provided with a liquid returning part (311) and a liquid supplying part (313) extending in the vertical direction at the two ends in the length direction, the liquid returning part (311) is provided with a liquid returning end, and the liquid supplying part (313) is provided with a liquid supplying end; two heat exchanging parts (31) are connected in series, the liquid returning part (311) of one heat exchanging part (31) is located at the opening end of the two heat exchangers (30), the liquid supplying part (313) of the other heat exchanging part (31) is located at the opening end of the two heat exchangers (30), the liquid returning end of the liquid returning part (311) located at the opening end of the two heat exchangers (30) forms the liquid returning port (315), and the liquid supplying end of the liquid supplying part (313) located at the opening end of the two heat exchangers (30) forms the liquid supplying port (314); each cooling liquid flow channel (3121) is communicated with the liquid returning part (311) and the liquid supplying part (313).

7. A liquid chiller unit as claimed in claim 4 or 5 wherein, The side part of the accommodating cavity is provided with an air inlet (111) opening in the horizontal direction, and the top part is provided with an air outlet (101); the liquid supplementing part (32) is provided with a heater, the cooling liquid conveying member comprises a liquid cooling pipeline (50) and a pump (40), the pump (40) is connected in series with the liquid cooling pipeline (50) to drive the cooling liquid to flow from the liquid returning port (315) to the liquid supplying port (314), the liquid supplementing port (51) is arranged on the liquid cooling pipeline (50) and is close to the input end of the pump (40), and the heater is adapted to heat the liquid or air in the liquid supplementing part (32) before the pump (40) is started; Two heat exchange parts (31) are connected in parallel, the cooling liquid flow channels (3121) and the air flow channels (3122) are arranged alternately along the length direction of the heat exchange parts (31), each cooling liquid flow channel (3121) and each air flow channel (3122) extend along the vertical direction; the upper and lower ends of the heat exchanger (30) are respectively provided with a liquid return part (311) and a liquid supply part (313) which communicate with each cooling liquid flow channel (3121), the liquid return part (311) extends along the horizontal direction and is provided with a liquid return end at the end close to the opening end of the included angle of the two heat exchangers (30), the two liquid return ends are connected in parallel to form the liquid return port (315), the liquid supply part (313) extends along the horizontal direction and is provided with a liquid supply end at the end close to the opening end of the included angle of the two heat exchangers (30), the two liquid supply ends are connected in parallel to form the liquid supply port (314); the liquid return part (311) is adjacent to the liquid supplement part (32) and is adapted to exchange heat with the liquid supplement part (32).

8. A liquid chiller as set forth in claim 3 wherein, The expansion cover (33) is arranged close to the included angle end of the two heat exchangers (30), the liquid supplement part (32) is provided with a visible window (322) close to the included angle end of the two heat exchangers (30) so that the liquid level of the liquid supplement part (32) can be observed; the side close to each other of the two liquid supplement parts (32) is further provided with an air isolation plate (323) which is connected with the top wall of the accommodating cavity.

9. A cabinet, characterized in that The cabinet (10), the liquid cooling unit and the heat generating assembly (60) are provided, the cabinet (10) is provided with an accommodating cavity (10A) at the top, and a relatively closed heat dissipation cavity (10B) is arranged below the accommodating cavity (10A); the side of the accommodating cavity (10A) is provided with an air inlet (111) which is opened along the horizontal direction, and the top is provided with an air outlet (101); the liquid cooling unit is arranged in the accommodating cavity (10A); the heat generating assembly (60) is arranged in the heat dissipation cavity (10B) and comprises a liquid cooling plate (61) and an electrical assembly (62), the liquid cooling plate (61) communicates with the cooling liquid conveying part to dissipate heat for at least part of the electrical assembly (62).

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