Cold plate with liquid storage function and refrigerating system

Abstract

The invention discloses a cold plate with a liquid storage function and a refrigerating system.The cold plate comprises a cold plate body, the cold plate body is provided with an evaporation flow channel, a first inlet and a first outlet, and the first inlet and the first outlet both communicate with the evaporation flow channel; the cold plate body is further provided with a liquid storage cavity capable of storing a high-pressure liquid refrigerant, a second inlet and a second outlet, the second inlet and the second outlet communicate with the liquid storage cavity, the liquid storage cavity is separated from the evaporation flow channel and can conduct heat transfer, and the second outlet is used for communicating with the first inlet through a first pipeline provided with a throttling element; the evaporation flow channel and the liquid storage cavity capable of storing the liquid refrigerant are integrated to the cold plate body, miniaturization of a refrigerating system can be achieved, the liquid refrigerant stored in the liquid storage cavity is utilized, redundant refrigerating capacity is absorbed and stored, the heat storage capacity and the cold storage capacity are achieved, large-amplitude temperature changes during load fluctuation can be reduced, and the service life of the refrigerating system is prolonged. When the compressor is started, enough liquid refrigerant enters the evaporation flow channel for refrigeration, and quick starting and refrigerating capacity outputting can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation, and in particular to a cold plate with a liquid storage function and a refrigeration system. Background Art

[0002] The computing board needs to be controlled at a suitable operating temperature to ensure its working reliability. With the advent of the information age, more and more data is stored, and the analysis and calculation of data are also increasing. The power consumption of the computing board continues to increase. Cold plates are often used instead of traditional radiators to dissipate heat for electronic components such as computing boards. The heat of the heating device is indirectly transferred to the coolant enclosed in the circulation pipeline through the cold plate, and the heat is taken away by the coolant. Cold plates are also often used in other fields, such as heat dissipation of battery packs in new energy vehicles and heat dissipation of power components in laser and radar equipment.

[0003] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: the cold plate itself has a small thermal capacity and no heat / cold storage capability, and the temperature is prone to large changes when the load fluctuates.

[0004] Therefore, how to provide a cold plate with a liquid storage function to improve the above-mentioned disadvantages is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a cold plate with liquid storage function and a refrigeration system, which have heat storage and cold storage capabilities and can reduce large temperature changes when load fluctuates.

[0006] To achieve the above-mentioned purpose, the present invention provides a cold plate with a liquid storage function, comprising a cold plate body, the cold plate body is provided with an evaporation flow channel, a first inlet and a first outlet, the first inlet and the first outlet are both connected to the evaporation flow channel, the cold plate body is further provided with a liquid storage cavity capable of storing high-pressure liquid refrigerant, a second inlet and a second outlet connected to the liquid storage cavity, the second outlet is used to be connected to the first inlet through a first pipeline provided with a throttling element, the throttling element is used to throttle and reduce the pressure of the liquid refrigerant and then flow into the evaporation flow channel to absorb heat;

[0007] The liquid storage chamber and the evaporation flow channel are isolated and can transfer heat.

[0008] In one possible design, the cold plate body includes an intermediate plate, a first cover plate capable of dissipating heat for a high-load heat source, and a second cover plate capable of dissipating heat for a low-load heat source, the first cover plate being connected to a first side of the intermediate plate to form an evaporation channel, and the second cover plate being connected to a second side of the intermediate plate to form a liquid storage chamber.

[0009] In a possible design, the first pipeline is further provided with a first valve body for controlling the on and off of the liquid refrigerant;

[0010] The second inlet is used to connect to the second pipeline, the second pipeline is used to supply high-pressure liquid refrigerant to flow to the second inlet, and the second pipeline is provided with a second valve body for controlling the on and off of the liquid refrigerant.

[0011] In a possible design, the evaporation flow channel is opened on the first side surface, and / or the evaporation flow channel is opened on the first cover plate.

[0012] In a possible design, the liquid storage chamber is opened on the second side surface, and / or the evaporation flow channel is opened on the second cover plate.

[0013] In a possible design, the first side surface and the second side surface are arranged oppositely on two sides of the middle plate.

[0014] In one possible design, the evaporating flow channel includes a first flow channel connected to a first inlet, an intermediate flow channel and a second flow channel connected to a first outlet, the first flow channel is connected to the second flow channel through the intermediate flow channel, the first flow channel and the second flow channel are both provided with docking ports connected to the intermediate flow channel, and the intermediate flow channel is bent to extend the flow path of the refrigerant in the evaporating flow channel.

[0015] In a possible design, there are multiple intermediate flow channels, the extension directions of the first flow channel and the second flow channel are parallel, and the multiple intermediate flow channels are arranged in sequence along the extension direction of the first flow channel or the second flow channel.

[0016] In a possible design, the second inlet and the second outlet are arranged on the same side relative to the liquid storage chamber; and / or,

[0017] The first inlet and the second outlet are arranged on the same side of the cold plate body.

[0018] In a possible design, both the first cover plate and the second cover plate are connected to the intermediate plate by brazing.

[0019] The present invention also provides a refrigeration system, comprising: a compressor, a condenser assembly, a one-way valve, a throttling element and a cold plate described in any one of the above items connected in sequence; the outlet of the one-way valve is connected to the second inlet, the throttling element is connected between the second outlet and the first inlet, and the first outlet is connected to the suction port of the compressor.

[0020] In a possible design, the throttling element includes a solenoid valve and a throttle valve connected in series.

[0021] Compared with the prior art, the cold plate with liquid storage function and the refrigeration system provided by the present invention have at least the following technical effects:

[0022] The evaporation flow channel and the liquid storage chamber capable of storing liquid refrigerant are integrated into the cold plate body, so that the refrigeration system can be miniaturized; the liquid refrigerant is throttled and depressurized before flowing into the evaporation flow channel to absorb heat, and the liquid refrigerant stored in the liquid storage chamber is used to absorb and store excess cooling capacity to stabilize the temperature of the heat source; the cold plate body provided with the liquid storage chamber has the ability to store heat and cold, and can reduce large temperature changes during load fluctuations; after the compressor is shut down, the second inlet and the second outlet of the liquid storage chamber can be closed, so that when the compressor is started next time, after the second inlet and the second outlet are opened, sufficient liquid refrigerant will immediately enter the evaporation flow channel for cooling, thereby achieving rapid start-up and output of cooling capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a cold plate body provided by an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The main view;

[0026] Figure 3 for Figure 1 Bottom view of

[0027] Figure 4 for Figure 1 Side view of

[0028] Figure 5 A schematic diagram of the structure of the intermediate plate provided in an embodiment of the present invention;

[0029] Figure 6 for Figure 5 Rear view of

[0030] Figure 7 for Figure 5 Side view of

[0031] Figure 8 for Figure 5 Bottom view of

[0032] Fig. 9 A schematic diagram of the structure of a first cover plate or a second cover plate provided in an embodiment of the present invention;

[0033] Fig.10 for Fig. 9 The main view;

[0034] Fig.11 for Fig. 9 Side view of

[0035] Fig.12 for Fig. 9 Top view of the .

[0036] in:

[0037] 100-cold plate body, 110-evaporation channel, 111-first channel, 112-intermediate channel, 113-second channel, 120-first inlet, 130-first outlet, 140-liquid storage chamber, 150-second inlet, 160-second outlet;

[0038] 200-middle plate, 210-first side surface, 220-second side surface;

[0039] 300-first cover plate;

[0040] 400 - Second cover plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] In the description of the present invention, it is necessary to understand that the terms "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0044] The purpose of the present invention is to provide a cold plate with a liquid storage function, which can realize the miniaturization of the refrigeration system, absorb and store excess cooling capacity, and has the ability to store heat and cold to avoid large temperature changes during load fluctuations. When the compressor is started, sufficient liquid refrigerant enters the evaporating flow channel 110 for cooling, which can achieve rapid start-up and output of cooling capacity.

[0045] See also Figures 1 to 4To achieve the above-mentioned purpose, the present invention provides a cold plate with a liquid storage function, including a cold plate body 100, the cold plate body 100 is provided with an evaporation flow channel 110, a first inlet 120 and a first outlet 130, the first inlet 120 and the first outlet 130 are both connected to the evaporation flow channel 110, the cold plate body 100 is also provided with a liquid storage chamber 140 capable of storing high-pressure liquid refrigerant, a second inlet 150 and a second outlet 160 connected to the liquid storage chamber 140, the second inlet 150 is used for supplying high-pressure liquid refrigerant to flow into the liquid storage chamber 140, for example, for supplying medium-temperature and high-pressure liquid refrigerant flowing out of a condenser assembly to flow into the liquid storage chamber 140 through the second inlet 150, the second outlet 160 is used to communicate with the first inlet 120 through a first pipeline provided with a throttling element, the throttling element is used to throttle and reduce the pressure of the liquid refrigerant and then flow into the evaporation flow channel 110 to absorb heat.

[0046] Usually, one side of the cold plate body 100 where the evaporation flow channel 110 is provided is placed close to the heat source to cool the heat source, and the circulation process of the refrigerant is realized by a circulation system arranged outside the cold plate body 100. Specifically, the low-temperature and low-pressure gaseous refrigerant is converted into high-temperature and high-pressure gaseous refrigerant after the compressor does work, and then enters the condenser assembly to release heat and cool into high-pressure liquid refrigerant. The high-pressure liquid refrigerant enters the liquid storage chamber 140 and flows from the liquid storage chamber 140 to the throttling element of the first pipeline for throttling and pressure reduction, and then flows to the evaporation flow channel 110 to absorb heat and be converted into low-temperature and low-pressure gaseous refrigerant, and then flows to the compressor to do work again, thereby realizing the circulation process of the refrigerant. When the heat source element is in low load and no-load standby, the compressor usually stops running. At this time, the flow of liquid refrigerant can be controlled so that the liquid storage chamber 140 stores high-pressure liquid refrigerant to meet the rapid startup requirements of the refrigeration system.

[0047] Integrating the evaporation channel 110 and the liquid storage chamber 140 capable of storing liquid refrigerant into the cold plate body 100 can avoid the need for a separate liquid storage tank for storing liquid refrigerant, and can achieve miniaturization of the refrigeration system; after throttling and reducing the pressure, the liquid refrigerant flows into the evaporation channel 110 to absorb heat. When the load decreases, the heat absorbed by the evaporation of the refrigerant in the evaporation channel 110 is greater than the heat released by the heat source to the cold plate body 100. At this time, the refrigerant in the evaporation channel 110 can absorb the heat of the liquid refrigerant in the liquid storage chamber 140, and the temperature of the liquid refrigerant in the liquid storage chamber 140 decreases, that is, the excess cooling capacity is absorbed and stored by the liquid refrigerant stored in the liquid storage chamber 140, and the temperature change of the heat source will also be reduced, which can effectively stabilize the temperature of the heat source; the cold plate body 100 provided with the liquid storage chamber 140 has the ability to store heat and cold, and can avoid large temperature changes when the load fluctuates.

[0048] See also Figures 5 to 12In this embodiment, the cold plate body 100 includes an intermediate plate 200, a first cover plate 300 capable of dissipating heat for a high-load heat source, and a second cover plate 400 capable of dissipating heat for a low-load heat source. The first cover plate 300 is connected to the first side surface 210 of the intermediate plate 200 to form an evaporation channel 110, and the second cover plate 400 is connected to the second side surface 220 of the intermediate plate 200 to form a liquid storage chamber 140. The liquid storage chamber 140 is separated from the evaporation channel 110 and can perform heat transfer (i.e., heat exchange). The high-pressure liquid refrigerant discharged from the condenser assembly of the refrigeration system enters the liquid storage chamber 140 through the second inlet 150. 0, and releases heat to the refrigerant evaporating in the evaporation channel 110 through the middle plate 200, and absorbs heat to the low-load heat source through the second cover plate 400, and then is discharged through the second outlet 160 of the liquid storage chamber 140; then, after throttling and reducing the pressure through the throttling element, it enters the evaporation channel 110 through the first inlet 120, and absorbs heat to the high-load heat source through the first cover plate 300, and absorbs heat to the high-pressure liquid refrigerant in the liquid storage chamber 140 through the middle plate 200, and then evaporates into a low-pressure gaseous refrigerant, flows out from the first outlet 130 of the evaporation channel 110, and then returns to the compressor of the refrigeration system.

[0049] When the load is stable, the heat sources attached to the first cover plate 300 and the second cover plate 400 can release heat to the refrigerant to maintain a stable temperature. When the load decreases, the heat absorbed by the evaporation of the refrigerant in the evaporation channel 110 is greater than the heat released by the first cover plate 300 and the second cover plate 400, resulting in a decrease in the temperature of the liquid refrigerant in the liquid storage chamber 140, and the excess cooling capacity can be stored, and the temperature change of the heat source will also be reduced. In addition, for the existing refrigeration system, it often takes a while to have a stable output of the preset cooling capacity after the compressor is shut down and restarted. During this process, the refrigerant discharged by the compressor is not enough to be stored in the condenser assembly. Condensation results in insufficient refrigerant entering the cold plate body 100 to absorb heat and refrigerate, resulting in poor cooling effect of the cold plate body 100. By integrating the liquid storage chamber 140 for storing high-pressure liquid refrigerant into the cold plate body 100, the second inlet 150 and the second outlet 160 of the liquid storage chamber 140 can be closed after the compressor stops, that is, the liquid storage chamber 140 is prevented from continuing to flow to the evaporation channel 110, so that when the compressor is started next time, after the second inlet 150 and the second outlet 160 are opened, sufficient liquid refrigerant will immediately enter the evaporation channel 110 for refrigeration, thereby achieving rapid output of cooling capacity when the compressor starts.

[0050] In one embodiment, the first pipeline is further provided with a first valve body for controlling the on-off of the liquid refrigerant; the second inlet 150 is used to connect the second pipeline, the second pipeline is used to connect to the condenser assembly, the second pipeline is used to supply high-pressure liquid refrigerant to the second inlet 150, and the second pipeline is provided with a second valve body for controlling the on-off of the liquid refrigerant; the first valve body and the second valve body can both use solenoid valves to control the circulation of the liquid refrigerant. When the compressor operates normally, the first valve body and the second valve body are opened, and when the compressor is turned off, the first valve body and the second valve body are closed to ensure that the high-pressure liquid refrigerant does not flow back, but is stored in the liquid storage cavity 140 of the cold plate body 100, so that the cold plate body 100 has heat storage and cold storage capabilities, can avoid large temperature changes when the load fluctuates, and cooperate with specific refrigeration devices and control logic to achieve the rapid output of cooling capacity when the compressor is started. The second valve body can also use a one-way valve to limit the flow direction of the high-pressure liquid refrigerant, which can achieve the above purpose.

[0051] In one embodiment, the evaporation channel 110 is provided on the first side surface 210, and / or the evaporation channel 110 is provided on the first cover plate 300. Specifically, the evaporation channel 110 can be provided on the first side surface 210, and the first cover plate 300 is set to be relatively thin. In this case, the first cover plate 300 is connected to the first side surface 210 of the intermediate plate 200, and the side of the evaporation channel 110 facing the first cover plate 300 is sealed by the first cover plate 300, so that the refrigerant flows along a preset path in the evaporation channel 110; the evaporation channel 110 can also be provided on the first cover plate 300, and the distance between the evaporation channel 110 and the high-load heat source is closer. In this case, the first side surface 210 can be close to the first cover plate 300. The cover plate 300 is tightly fitted to a plane, and the first side 210 seals the side of the evaporation channel 110 toward the middle plate 200, so that the refrigerant can flow along a preset path in the evaporation channel 110. In addition, the evaporation channel 110 can also be simultaneously opened on the first side 210 and the first cover plate 300, which can increase the flow cross-section of the evaporation channel 110. The first side 210 and the first cover plate 300 on which the evaporation channel 110 is provided are fitted together to form a complete evaporation channel 110 for the circulation of refrigerant.

[0052] In one embodiment, the liquid storage chamber 140 is opened on the second side surface 220, and / or, the liquid storage chamber 140 is opened on the second cover plate 400. Specifically, the liquid storage chamber 140 can be opened on the second side surface 220, and the second cover plate 400 is set to be thinner. At this time, the second cover plate 400 is connected to the second side surface 220 of the middle plate 200, and the side of the liquid storage chamber 140 facing the second cover plate 400 is sealed by the second cover plate 400, so that the liquid refrigerant can flow and be stored in the liquid storage chamber 140; the liquid storage chamber 140 can also be opened on the second cover plate 400, and the distance between the liquid storage chamber 140 and the low-load heat source is closer. At this time, the second side surface 220 can be able to be connected to the second cover plate 400. The second side 220 and the second cover plate 400 are tightly fitted to each other, and the side of the liquid storage chamber 140 facing the middle plate 200 is sealed by the second side 220, so that the liquid refrigerant can also circulate and be stored in the liquid storage chamber 140; in addition, the liquid storage chamber 140 can also be simultaneously opened on the second side 220 and the second cover plate 400, which can increase the accommodating space of the liquid storage chamber 140, and the second side 220 and the second cover plate 400 are provided with one side of the liquid storage chamber 140 to fit each other, so as to form a complete liquid storage chamber 140 for the circulation and storage of liquid refrigerant.

[0053] When the evaporation channel 110 is opened on the first side 210 of the middle plate 200, and the liquid storage chamber 140 is opened on the second side 220 of the middle plate 200, the distance between the evaporation channel 110 and the side close to the liquid storage chamber 140 can be adjusted by controlling the opening depth of the evaporation channel 110 and the liquid storage chamber 140, thereby changing the heat transfer efficiency between the evaporation channel 110 and the liquid storage chamber 140. At this time, the first cover plate 300 and the second cover plate 400 can both adopt a plate structure, and when the first side 210 and the second When the sizes of the side surfaces 220 are similar or identical, the first cover plate 300 and the second cover plate 400 can be interchanged to reduce production and maintenance costs; when the evaporation channel 110 is opened on the first cover plate 300 and the liquid storage chamber 140 is opened on the second cover plate 400, the middle plate 200 acts as a separate partition to separate the evaporation channel 110 and the liquid storage chamber 140. At this time, the middle plate 200 can be set to a plate body of a certain thickness, one side of the plate body is the first side surface 210, and the other side of the plate body is the second side surface 220.

[0054] In one embodiment, the middle plate 200 is a cubic structure, and the middle plate 200 has six sides. The first side 210 and the second side 220 can be any two adjacent sides of the six sides or any two opposite sides of the six sides. By opening the evaporation channel 110 on the first side 210 and the liquid storage chamber 140 on the second side 220, and by different opening depths, the evaporation channel 110 and the liquid storage chamber 140 are ensured to be separated, so that the beneficial effect of the liquid storage chamber 140 can be achieved. The specific sizes of the evaporation channel 110 and the liquid storage chamber 140 can be adjusted according to the size of the cold plate body 100, which is not specifically limited here. Preferably, the first side 210 and the second side 220 are relatively arranged on both sides of the middle plate 200, so as to cool the high-load heat source and the low-load heat source, etc. The actual shape of the cold plate body 100 can also be adjusted according to the specific positions of the high-load heat source and the low-load heat source, so that the first side 210 corresponds to the high-load heat source, and the second side 220 corresponds to the low-load heat source.

[0055] In one of the embodiments, the evaporation channel 110 includes a first channel 111 connected to the first inlet 120, an intermediate channel 112 and a second channel 113 connected to the first outlet 130, the first channel 111 is connected to the second channel 113 through the intermediate channel 112, the first channel 111 and the second channel 113 are both provided with docking ports docked with the intermediate channel 112, the intermediate channel 112 is bent to extend the flow path of the refrigerant in the evaporation channel 110, the intermediate channel 112 includes a direct current section and a curved flow section connected to one end of an adjacent direct current section, and considering the uniformity of heat exchange, all direct current sections can be arranged in parallel, and the distance between adjacent direct current sections is the same to ensure that the direct current sections are evenly arranged in a preset area of ​​the first side 210.

[0056] In one embodiment, there may be one intermediate flow channel 112, which is connected to the first flow channel 111 and the second flow channel 113 through the intermediate flow channel 112, ensuring that the refrigerant flowing through the first flow channel 111 and entering the evaporation flow channel 110 can all pass through the intermediate flow channel 112 and the second flow channel 113, so that the refrigerant flow path is longer; there may be multiple intermediate flow channels 112, the first flow channel 111 and the second flow channel 113 extend in parallel, and the multiple intermediate flow channels 112 are arranged in sequence along the extension direction of the first flow channel 111 or the second flow channel 113. The multiple intermediate flow channels 112 can appropriately shorten the refrigerant flow path in The length of a single path circulating in the evaporating flow channel 110 can also avoid the problem of the refrigerant being unable to circulate in the evaporating flow channel 110 due to the blockage of a single intermediate flow channel 112. The multiple docking ports corresponding to the multiple intermediate flow channels 112 are arranged at equal intervals on the first flow channel 111 and the second flow channel 113, so that the length of the circulation path of the refrigerant passing through different intermediate flow channels 112 in the evaporating flow channel 110 is consistent, thereby improving the heat absorption effect of the refrigerant. In addition, the circulation path lengths of the multiple intermediate flow channels 112 can also be set differently, which can improve the evaporation heat exchange effect of the refrigerant in the evaporating flow channel 110.

[0057] In one of the embodiments, the second inlet 150 and the second outlet 160 are arranged on the same side relative to the liquid storage chamber 140, so that the first pipeline and the second pipeline are arranged on the same side, which is convenient for installation and disassembly, and can reduce the space occupied by the cold plate body 100, the first pipeline and the second pipeline. In addition, the first inlet 120 and the second outlet 160 can be arranged on the same side of the cold plate body 100, shortening the length of the first pipeline, reducing the circulation time of the refrigerant in the first pipeline, and thereby reducing the heat exchange between the refrigerant in the first pipeline and the external environment. At the same time, when the first inlet 120 and the second outlet 160 are both located on the bottom surface of the cold plate body 100, the first inlet 120 and the second outlet 160 are at the same height to avoid the loss of more energy during the circulation of the coolant. The material of the cold plate body 100 can be aluminum, and the first cover plate 300 and the second cover plate 400 can be brazed with the middle plate 200 using a special brazing fixture.

[0058] Based on the above content, the present invention also provides a refrigeration system, including: a compressor, a condenser assembly, a one-way valve, a throttling element and a cold plate described in any of the above embodiments connected in sequence, the outlet of the one-way valve is connected to the second inlet 150, the second outlet 160 is connected to one end of the throttling element, and the other end of the throttling element is connected to the first inlet 120, that is, the throttling element is connected between the second outlet 160 and the first inlet 120, and the first outlet 130 is connected to the air intake port of the compressor, so as to form a circulation loop. Since the refrigeration system adopts the above cold plate, it should also have the same beneficial effects as the above cold plate, which will not be repeated here.

[0059] The condenser assembly may include a condensing fan and a condensing coil. The inlet of the condensing coil is connected to the exhaust port of the compressor, and the outlet of the condensing coil is connected to the inlet of the one-way valve. The condensing fan is used to blow air to dissipate heat for the condensing coil, that is, to achieve forced convection heat exchange between the condensing coil and the ambient gas through the condensing fan.

[0060] When the refrigeration system is in operation, the compressor outputs refrigerant into the condenser assembly for condensation. For example, high-temperature and high-pressure refrigerant gas can be output and enter the condenser assembly for condensation. The condensed refrigerant (for example, medium-temperature and high-pressure refrigerant liquid) passes through a one-way valve and enters the liquid storage chamber 140 for cooling. The cooled refrigerant passes through a throttling element and is throttled and depressurized before entering the evaporation channel 110 to cool and dissipate heat for the target device. Specifically, the throttling element throttles the refrigerant output from the liquid storage chamber 140 into a low-temperature and low-pressure gas-liquid mixture (or refrigerant liquid). After entering the evaporation channel 110, the throttled refrigerant absorbs heat and evaporates into a low-temperature and low-pressure refrigerant gas, which then returns to the compressor through the pipeline to continue circulating.

[0061] In some application scenarios, after the compressor stops running, the refrigerant liquid retained in the liquid storage chamber 140 migrates to the condensing coil with the pressure gradient, resulting in insufficient refrigerant liquid in front of the throttling element when the compressor is restarted and insufficient cooling capacity output, thereby affecting the cooling response speed of the refrigeration system. In this embodiment, by setting a one-way valve, after the compressor stops running, the refrigerant liquid retained in the liquid storage chamber 140 can be effectively prevented from migrating to the condensing coil with the pressure gradient after the condensing coil of the condenser assembly is cooled and depressurized, effectively ensuring that the refrigerant liquid in front of the throttling element is sufficient when the compressor is restarted, that is, there is sufficient cooling capacity output, thereby improving the cooling response speed of the refrigeration system.

[0062] In some application scenarios, after the compressor stops running, since the temperature and pressure in the evaporation flow channel 110 are lower than those in other pipelines, the refrigerant in the high-pressure pipeline migrates to the low-pressure pipeline through the throttling element. In order to effectively overcome the above problems, the throttling element includes a solenoid valve and a throttle valve connected in series, so that after the compressor stops running, the solenoid valve and the throttle valve can be controlled to close, effectively preventing the refrigerant in the high-pressure pipeline from migrating to the low-pressure pipeline through the throttling element, such as the refrigerant liquid stored in the liquid storage chamber 140 flowing into the evaporation flow channel 110, and further, it can also ensure that the refrigerant liquid in front of the throttling element is sufficient when the compressor is started again, so that sufficient cooling capacity output can be provided. By using a solenoid valve with good shut-off performance in combination with a general throttle valve, while fully maintaining the quick start-up characteristics, it can also effectively ensure that the system is accidentally powered off and the high and low pressure pipelines are cut off in time, reducing the risk caused by refrigerant migration. It can be understood that the throttle valve can include an electronic expansion valve or a capillary tube or a thermal expansion valve.

[0063] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A cold plate with liquid storage function, characterized in that: The cold plate body (100) comprises an evaporation flow channel (110), a first inlet (120) and a first outlet (130), wherein the first inlet (120) and the first outlet (130) are both in communication with the evaporation flow channel (110), and the cold plate body (100) is also provided with a liquid storage chamber (140) capable of storing high-pressure liquid refrigerant, a second inlet (150) and a second outlet (160) in communication with the liquid storage chamber (140), wherein the second outlet (160) is used to be in communication with the first inlet (120) via a first pipeline provided with a throttling element, wherein the throttling element is used to throttle and reduce the pressure of the liquid refrigerant and then flow into the evaporation flow channel (110) to absorb heat; The liquid storage chamber (140) and the evaporation flow channel (110) are separated and can perform heat transfer.

2. The cold plate with liquid storage function according to claim 1, characterized in that: The cold plate body (100) comprises an intermediate plate (200), a first cover plate (300) capable of dissipating heat for a high-load heat source, and a second cover plate (400) capable of dissipating heat for a low-load heat source, wherein the first cover plate (300) is connected to a first side surface (210) of the intermediate plate (200) to form the evaporation channel (110), and the second cover plate (400) is connected to a second side surface (220) of the intermediate plate (200) to form the liquid storage chamber (140).

3. The cold plate with liquid storage function according to claim 1, characterized in that: The first pipeline is also provided with a first valve body for controlling the on and off of the liquid refrigerant; The second inlet (150) is used to connect to a second pipeline, the second pipeline is used to allow high-pressure liquid refrigerant to flow to the second inlet (150), and the second pipeline is provided with a second valve body for controlling the on and off of the liquid refrigerant.

4. The cold plate with liquid storage function according to claim 2, characterized in that: The evaporation flow channel (110) is opened on the first side surface (210), and / or the evaporation flow channel (110) is opened on the first cover plate (300).

5. The cold plate with liquid storage function according to claim 2, characterized in that: The liquid storage cavity (140) is opened on the second side surface (220), and / or the evaporation flow channel (110) is opened on the second cover plate (400).

6. The cold plate with liquid storage function according to claim 2, characterized in that: The first side surface (210) and the second side surface (220) are arranged oppositely on two sides of the middle plate (200).

7. The cold plate with liquid storage function according to any one of claims 1 to 6, characterized in that: The evaporation flow channel (110) comprises a first flow channel (111) connected to the first inlet (120), an intermediate flow channel (112), and a second flow channel (113) connected to the first outlet (130); the first flow channel (111) is connected to the second flow channel (113) via the intermediate flow channel (112); the first flow channel (111) and the second flow channel (113) are both provided with a docking port for docking with the intermediate flow channel (112); the intermediate flow channel (112) is bent to extend a flow path of the refrigerant in the evaporation flow channel (110).

8. The cold plate with liquid storage function according to claim 7, characterized in that: There are a plurality of intermediate flow channels (112), the first flow channel (111) and the second flow channel (113) extend in parallel, and the plurality of intermediate flow channels (112) are arranged in sequence along the extension direction of the first flow channel (111) or the second flow channel (113).

9. The cold plate with liquid storage function according to any one of claims 1 to 6, characterized in that: The second inlet (150) and the second outlet (160) are arranged on the same side relative to the liquid storage chamber (140); and / or, The first inlet (120) and the second outlet (160) are arranged on the same side of the cold plate body (100).

10. The cold plate with liquid storage function according to any one of claims 4 to 6, characterized in that: The first cover plate (300) and the second cover plate (400) are both connected to the middle plate (200) by brazing.

11. A refrigeration system, characterized in that: include: A compressor, a condenser assembly, a one-way valve, and a throttling element connected in sequence and a cold plate as described in any one of claims 1 to 10; the outlet of the one-way valve is connected to the second inlet (150), the throttling element is connected between the second outlet (160) and the first inlet (120), and the first outlet (130) is connected to the suction port of the compressor.

12. The refrigeration system according to claim 11, characterized in that: The throttling element includes a solenoid valve and a throttle valve connected in series.

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