Phase change heat spreader, heat dissipation system and data center

Abstract

The utility model provides a kind of phase-change radiator, comprising: two or more gravity cold plates, each gravity cold plate corresponds to a heat source component of server, and the gravity cold plate is used to be in heat contact with corresponding heat source component;Heat exchanger group, the heat exchanger group includes two or more heat exchangers, and the low temperature side of two or more heat exchangers is serially communicated, and each heat exchanger corresponds to a gravity cold plate, and the high temperature side opening of heat exchanger is communicated with the medium exchange opening of gravity cold plate.The phase-change radiator, heat dissipation system and data center provided by the utility model can effectively reduce the design complexity of heat dissipation circulating pipeline.

Description

Technical Field

[0001] This utility model relates to the field of computer cooling technology, and in particular to a phase change radiator, a heat dissipation system and a data center. Background Technology

[0002] Heat sinks are the primary heat dissipation components for server CPUs and other heat sources, crucial for providing suitable operating temperatures and ensuring normal server operation. Current technology typically employs air-cooled heat sinks, which use heat pipes, fins, and fans for cooling. While this method provides some cooling, it suffers from issues such as high fan noise, complex airflow design, and challenges in internal space planning. Besides air cooling, phase-change heat sinks can also be used. However, existing phase-change heat sinks usually correspond to a complete circulation loop for each heat source. In multi-heat-source servers, installing a phase-change heat sink for each heat source requires multiple complete circulation loops, leading to complex heat dissipation circulation design. Utility Model Content

[0003] The phase change radiator, heat dissipation system and data center provided by this utility model can effectively reduce the design complexity of heat dissipation circulation pipelines.

[0004] In a first aspect, this utility model provides a phase change heat sink, comprising:

[0005] Two or more gravity-cooled plates, each of which corresponds to a heat source component of the server, and the gravity-cooled plate is used to make thermally conductive contact with the corresponding heat source component;

[0006] A heat exchanger group, comprising two or more heat exchangers, wherein the low-temperature sides of the two or more heat exchangers are connected in series, each heat exchanger corresponds to a gravity cold plate, and the high-temperature side opening of the heat exchanger is connected to the medium exchange opening of the corresponding gravity cold plate.

[0007] The gravity-cooled plate includes:

[0008] A heat spreader plate, which is used to contact the corresponding heat source component;

[0009] A flow channel plate is in thermal contact with the heat exchange plate, and a medium pipe is provided on the surface of the flow channel plate opposite to the heat exchange plate.

[0010] The mounting cover has a cutout area corresponding to the position of the medium pipeline. The mounting cover is used to connect with the bracket in the server to press the heat spreader and the flow channel plate together and fix the heat spreader and the flow channel plate.

[0011] A medium cover is provided, which is connected to the installation cover and covers the excavated area. The medium cover has a medium exchange opening corresponding to the position of the medium pipeline.

[0012] Optionally, the gravity-cooled plate further includes:

[0013] An adapter has an adjacent and perpendicular first surface and a second surface. The first surface has a first opening, and the second surface has a second opening. The first opening and the second opening are in communication. The first opening of the adapter is connected to a high-temperature side opening through a pipe, and the second opening of the adapter is connected to a medium exchange opening.

[0014] Optionally, the heat exchanger includes:

[0015] The cavity has a first sidewall and a second sidewall that are arranged opposite to and parallel to each other. The first sidewall of the cavity is provided with a first low-temperature side inlet and a first low-temperature side outlet. The second sidewall is provided with a second low-temperature side inlet and a second low-temperature side outlet. The second low-temperature side outlet is connected to the first low-temperature side inlet of the adjacent heat exchanger, and the second low-temperature side inlet is connected to the first low-temperature side outlet of the adjacent heat exchanger.

[0016] A high-temperature side pipe is disposed in the cavity and has a high-temperature side opening that is connected to the medium exchange opening of the corresponding gravity cooling plate.

[0017] Heat exchange fins are disposed within the cavity and are thermally connected to the high-temperature side pipe.

[0018] Optionally, the first low-temperature side inlet is located below the first low-temperature side outlet, and the second low-temperature side inlet is located above the second low-temperature side outlet.

[0019] Optionally, the cavity has a bottom plate perpendicular to the first and second side walls, the high-temperature side opening penetrates the bottom plate, and the outer surface of the high-temperature side opening is sealed to the bottom plate.

[0020] Secondly, the present invention also provides a heat dissipation system, comprising:

[0021] One or more radiator groups, the radiator group comprising one or more phase change radiators as described in any of the preceding claims, wherein the heat exchanger groups of the one or more phase change radiators are connected in series.

[0022] The compressor has its inlet connected to the outlet of the radiator assembly;

[0023] A condenser, the inlet of which is connected to the outlet of the compressor;

[0024] An expansion valve, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the radiator assembly.

[0025] Optionally, the system further includes:

[0026] A liquid storage tank, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the expansion valve.

[0027] Optionally, the one or more radiator groups are connected in parallel;

[0028] The system also includes:

[0029] A flow equalizer, wherein the inlet of the flow equalizer is connected to the outlet of the expansion valve, and the outlet of the flow equalizer is connected to the inlet of one or more radiator assemblies.

[0030] Optionally, the system further includes:

[0031] A fluorine pump, wherein the low-temperature inlet of the fluorine pump is connected to the outlet of the radiator assembly, and the low-temperature outlet of the fluorine pump is connected to the inlet of the condenser.

[0032] Thirdly, the present invention also provides a data center, comprising:

[0033] Multiple servers, wherein the multiple servers are configured in an array;

[0034] The heat dissipation system as described in any of the preceding claims, wherein each row of servers corresponds to one heat sink group, each server corresponds to one phase change heat sink, and multiple heat sink groups are connected in parallel.

[0035] In the technical solution provided by this utility model, by connecting multiple heat exchangers in series and making each heat exchanger correspond to a gravity cold plate, an external cold source is connected to multiple heat exchangers through a set of circulation pipes, thereby enabling simultaneous cooling and heat dissipation for multiple heat sources in the server, effectively simplifying the heat sink circulation system when there are multiple heat sources in the server. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a phase change heat sink according to an embodiment of the present invention;

[0037] Figure 2 This is an exploded view of the gravity cooling plate in another embodiment of the phase change radiator of this utility model;

[0038] Figure 3This is a schematic diagram of a heat exchanger in a phase change radiator according to another embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of a phase change heat sink installed on a server according to another embodiment of the present invention;

[0040] Figure 5 This is a perspective view of a phase change heat sink installed on a server, according to another embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the circulation pipeline of a heat dissipation system according to another embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the circulation pipeline of a heat dissipation system according to another embodiment of the present invention.

[0043] Among them, gravity cooling plate-1; heat spreader plate-11; flow channel plate-12; medium pipeline-121; installation cover-13; hollow area-131; medium cover-14; medium exchange opening-141; adapter-15; heat exchanger-2; first low temperature side inlet-21; first low temperature side outlet-22; second low temperature side inlet-23; second low temperature side outlet-24; high temperature side pipeline-25; heat exchange fins-26; high temperature side opening-27; phase change radiator-100. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] This utility model embodiment provides a phase change heat sink, such as Figure 1 As shown, it includes:

[0046] Two or more gravity cooling plates 1, each of the gravity cooling plates 1 corresponding to a heat source component of the server, the gravity cooling plate 1 being used for thermally conductive contact with the corresponding heat source component;

[0047] The heat exchanger group includes two or more heat exchangers 2, the low-temperature sides of the two or more heat exchangers 2 are connected in series, each heat exchanger 2 corresponds to a gravity cold plate 1, and the high-temperature side opening 27 of the heat exchanger 2 is connected to the medium exchange opening 141 of the corresponding gravity cold plate 1.

[0048] In some embodiments, the gravity cooling plate 1 is disposed inside the server and makes thermal contact with the heat source components in the server. After being heated, the medium in the gravity cooling plate 1 evaporates into a gaseous state. The gaseous medium enters the high-temperature side of the heat exchanger 2. After entering the heat exchanger 2, the gaseous medium is cooled through heat exchange within the heat exchanger 2. After condensation, it becomes a liquid medium and flows back to the bottom gravity cooling plate 1. This process is repeated to cool the heat source components inside the server. When two or more heat exchangers 2 are connected in series in the heat exchanger group, the entire heat exchanger group consists of only one low-temperature inlet and one low-temperature outlet. The low-temperature inlet and outlet of the heat exchanger group are connected to a cold source, and the heat from the high-temperature side is absorbed through circulation on the low-temperature side of the heat exchanger 2.

[0049] In the technical solution provided by this utility model embodiment, by connecting multiple heat exchangers 2 in series and making each heat exchanger 2 correspond to a gravity cold plate 1, an external cold source is connected to multiple heat exchangers through a set of circulation pipes, thereby enabling simultaneous cooling and heat dissipation for multiple heat sources in the server, effectively simplifying the heat sink circulation system when there are multiple heat sources in the server.

[0050] As an optional implementation method, such as Figure 2 As shown, the gravity-cooled plate 1 includes:

[0051] Temperature distribution plate 11, the temperature distribution plate 11 is used to contact the corresponding heat source component;

[0052] The flow channel plate 12 is in thermal contact with the heat exchange plate 11, and a medium pipe 121 is provided on the surface of the flow channel plate 12 facing away from the heat exchange plate 11.

[0053] The mounting cover 13 has a cutout area 131 corresponding to the position of the medium pipeline 121. The mounting cover 13 is used to connect with the bracket in the server to press the heat spreader 11 and the flow channel plate 12 to fix the heat spreader 11 and the flow channel plate 122.

[0054] A medium cover 14 is connected to the installation cover 13 and covers the hollowed-out area 131. The medium cover 14 is provided with a medium exchange opening 141 corresponding to the position of the medium pipeline 121.

[0055] In some embodiments, the heat spreader 11 is in direct contact with the heat source component. After the heat spreader 11 is heated, it transfers heat to the medium in the medium pipeline 121. The liquid medium in the medium pipeline 121 is heated and evaporates into a gaseous state, and then enters the heat exchanger 2 through the medium exchange opening 141.

[0056] As an optional implementation method, such as Figure 2As shown, the gravity-cooled plate 1 further includes:

[0057] The adapter 15 has an adjacent and perpendicular first surface and a second surface. The first surface is provided with a first opening, and the second surface is provided with a second opening. The first opening and the second opening are in communication. The first opening of the adapter 15 is in communication with the high-temperature side opening 27 through a pipe, and the second opening of the adapter 15 is in communication with the medium exchange opening 141.

[0058] In some embodiments, since the gravity cooling plate 1 mainly relies on the gravity of the liquid medium for reflux, the gravity cooling plate 1 needs to be in a vertical or nearly vertical state. In this embodiment, the adapter 15 is used to change the medium exchange opening 141 by 90° in order to realize the reflux of the liquid medium.

[0059] As an optional implementation method, such as Figure 3 As shown, the heat exchanger 2 includes:

[0060] The cavity has a first sidewall and a second sidewall that are arranged opposite to and parallel to each other. The first sidewall of the cavity is provided with a first low-temperature side inlet 21 and a first low-temperature side outlet 22. The second sidewall is provided with a second low-temperature side inlet 23 and a second low-temperature side outlet 24. The second low-temperature side outlet 24 is connected to the first low-temperature side inlet 21 of the adjacent heat exchanger 2, and the second low-temperature side inlet 23 is connected to the first low-temperature side outlet 22 of the adjacent heat exchanger 2.

[0061] A high-temperature side pipe 25 is disposed in the cavity. The high-temperature side pipe 25 has a high-temperature side opening 27, which is connected to the medium exchange opening 141 of the corresponding gravity cooling plate 1.

[0062] Heat exchange fins 26 are disposed in the cavity and are thermally connected to the high-temperature side pipe 25.

[0063] As an optional implementation, the first low-temperature side inlet 21 is located below the first low-temperature side outlet 22, and the second low-temperature side inlet 21 is located above the second low-temperature side outlet 23.

[0064] As an optional implementation, the cavity has a bottom plate perpendicular to the first side wall and the second side wall, the high-temperature side opening 27 penetrates the bottom plate, and the outer surface of the high-temperature side opening 27 is sealed to the bottom plate.

[0065] like Figure 4-5As shown, an exemplary schematic diagram of the phase change heat sink 100 in the foregoing embodiments installed on a server is illustrated. During installation, the mounting cover is connected to the bracket or support plate in the server, so that the gravity cooling plate makes thermal contact with multiple heat source components in the server. The heat source components can be, for example, multiple CPUs, thereby realizing a scheme in which a single circulation pipe cools two or more gravity cooling plates, and multiple gravity cooling plates dissipate heat for multiple heat source components respectively.

[0066] This invention also provides a heat dissipation system, such as... Figure 6-7 As shown, it includes:

[0067] One or more radiator groups, the radiator group comprising one or more phase change radiators as described in any of the preceding claims, wherein the heat exchanger groups of the one or more phase change radiators are connected in series.

[0068] The compressor has its inlet connected to the outlet of the radiator assembly;

[0069] A condenser, the inlet of which is connected to the outlet of the compressor;

[0070] An expansion valve, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the radiator assembly.

[0071] In some embodiments, Figure 6 The example illustrates a circulation pipeline where each heat exchanger group includes a phase change heat exchanger and multiple heat exchanger groups are connected in parallel. The heat exchanger 2 inside the server is heated by the high-temperature side heat transfer to the copper pipe network to heat the low-temperature side refrigerant. The low-temperature side refrigerant is converted into gaseous refrigerant and flows back to the compressor inlet. The gaseous refrigerant is compressed into a high-pressure gaseous state by the compressor, and then passes through the condenser to form a high-pressure liquid refrigerant. The high-pressure liquid refrigerant is then expanded into a low-pressure low-temperature refrigerant by the expansion valve, and finally flows through the flow equalizer to the heat exchangers 2 of each server. The low-temperature side inlet of the heat exchanger 2 is in a low-pressure, low-temperature two-phase state. After exchanging heat with the high-temperature side of the heat exchanger 2, it is converted back into a high-temperature, low-pressure gaseous refrigerant and flows back to the compressor. This process is repeated to continuously cool the high-temperature side of the heat exchanger 2. Figure 7 The example illustrates a heatsink group comprising four serially connected phase-change heatsinks, with two heatsink groups connected in parallel via a circulation pipeline, the circulation process of which is similar to... Figure 6 The circulation process is roughly similar, the difference being the refrigerant flow pattern within the same radiator assembly. Figure 7In the circulation pipeline shown, the splitter is connected to the inlet of the first two-phase radiator, the outlet of the first two-phase radiator is connected to the inlet of the second two-phase radiator, the outlet of the second two-phase radiator is connected to the inlet of the third two-phase radiator, the inlet of the third two-phase radiator is connected to the inlet of the fourth two-phase radiator, and the outlet of the fourth server merges into the inlet of the compressor.

[0072] As an optional implementation, continue as follows Figure 5-6 As shown, the system also includes:

[0073] A liquid storage tank, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the expansion valve.

[0074] As an optional implementation, continue as follows Figure 5-6 As shown, the one or more radiator groups are connected in parallel;

[0075] The system also includes:

[0076] A flow equalizer, wherein the inlet of the flow equalizer is connected to the outlet of the expansion valve, and the outlet of the flow equalizer is connected to the inlet of one or more radiator assemblies.

[0077] As an optional implementation, continue as follows Figure 5-6 As shown, the system also includes:

[0078] A fluorine pump, wherein the low-temperature inlet of the fluorine pump is connected to the outlet of the radiator assembly, and the low-temperature outlet of the fluorine pump is connected to the inlet of the condenser.

[0079] In some embodiments, when the compressor's cooling load is not strong, a refrigerant pump connected in parallel with the compressor can be used for cooling to reduce system energy consumption.

[0080] This invention also provides a data center, comprising:

[0081] Multiple servers, wherein the multiple servers are configured in an array;

[0082] The heat dissipation system as described in any of the preceding claims, wherein each row of servers corresponds to one heat sink group, each server corresponds to one phase change heat sink, and multiple heat sink groups are connected in parallel.

[0083] In the technical solution provided by this utility model embodiment, a single circulation loop uses two or more gravity cooling plates for cooling. These two or more gravity cooling plates dissipate heat from different heat source components, thereby simplifying the layout of the internal circulation piping of the server. Simultaneously, since multiple heat sinks are connected in series in this application, the direct cooling capacity of the gravity cooling plates is reduced, avoiding the risk of short circuits caused by condensation on the exterior of the gravity cooling plates. Furthermore, the dual-phase heat sink in the technical solution provided by this utility model embodiment can flexibly form heat sink groups by connecting them in series, depending on the placement of multiple servers. Multiple heat sink groups can also be connected in parallel, thereby meeting the heat dissipation needs of multiple servers using a single circulation pipe or a small number of circulation pipes.

[0084] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A phase change heat spreader, comprising: include: Two or more gravity-cooled plates, each of which corresponds to a heat source component of the server, and the gravity-cooled plate is used to make thermally conductive contact with the corresponding heat source component; A heat exchanger group, comprising two or more heat exchangers, wherein the low-temperature sides of the two or more heat exchangers are connected in series, each heat exchanger corresponds to a gravity cold plate, and the high-temperature side opening of the heat exchanger is connected to the medium exchange opening of the corresponding gravity cold plate. The gravity-cooled plate includes: A heat spreader plate, which is used to contact the corresponding heat source component; A flow channel plate is in thermal contact with the heat exchange plate, and a medium pipe is provided on the surface of the flow channel plate opposite to the heat exchange plate. The mounting cover has a cutout area corresponding to the position of the medium pipeline. The mounting cover is used to connect with the bracket in the server to press the heat spreader and the flow channel plate together and fix the heat spreader and the flow channel plate. A medium cover is provided, which is connected to the installation cover and covers the excavated area. The medium cover has a medium exchange opening corresponding to the position of the medium pipeline.

2. The phase change heat spreader of claim 1, wherein, The gravity-cooled plate also includes: An adapter has an adjacent and perpendicular first surface and a second surface. The first surface has a first opening, and the second surface has a second opening. The first opening and the second opening are in communication. The first opening of the adapter is connected to the high-temperature side opening through a pipe, and the second opening of the adapter is connected to the medium exchange opening.

3. The phase change heat spreader of claim 1, wherein, The heat exchanger includes: The cavity has a first sidewall and a second sidewall that are arranged opposite to and parallel to each other. The first sidewall of the cavity is provided with a first low-temperature side inlet and a first low-temperature side outlet. The second sidewall is provided with a second low-temperature side inlet and a second low-temperature side outlet. The second low-temperature side outlet is connected to the first low-temperature side inlet of the adjacent heat exchanger, and the second low-temperature side inlet is connected to the first low-temperature side outlet of the adjacent heat exchanger. A high-temperature side pipe is disposed in the cavity and has a high-temperature side opening, which is connected to the medium exchange opening of the corresponding gravity cooling plate. Heat exchange fins are disposed within the cavity and are thermally connected to the high-temperature side pipe.

4. The phase change heat spreader of claim 3, wherein, The first low-temperature side inlet is located below the first low-temperature side outlet, and the second low-temperature side inlet is located above the second low-temperature side outlet.

5. The phase change heat spreader of claim 3, wherein, The cavity has a bottom plate perpendicular to the first side wall and the second side wall, the high-temperature side opening penetrates the bottom plate, and the outer surface of the high-temperature side opening is sealed to the bottom plate.

6. A heat dissipation system characterized by, include: One or more radiator groups, the radiator group comprising one or more phase change radiators as described in any one of claims 1-5, wherein the heat exchanger groups of the one or more phase change radiators are connected in series. The compressor has its inlet connected to the outlet of the radiator assembly; A condenser, the inlet of which is connected to the outlet of the compressor; An expansion valve, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the radiator assembly.

7. The heat dissipation system of claim 6, wherein, The system also includes: A liquid storage tank, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the expansion valve.

8. The heat dissipation system of claim 6, wherein, The one or more radiator groups are connected in parallel; The system also includes: A flow equalizer, wherein the inlet of the flow equalizer is connected to the outlet of the expansion valve, and the outlet of the flow equalizer is connected to the inlet of one or more radiator assemblies.

9. The heat dissipation system of claim 6, wherein, The system also includes: A fluorine pump, wherein the low-temperature inlet of the fluorine pump is connected to the outlet of the radiator assembly, and the low-temperature outlet of the fluorine pump is connected to the inlet of the condenser.

10. A data center, characterized by, include: Multiple servers, wherein the multiple servers are configured in an array; The heat dissipation system according to any one of claims 6-9, wherein each row of servers corresponds to one heat sink group, each server corresponds to one phase change heat sink, and multiple heat sink groups are connected in parallel.

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