Variable gravity tank centrifuge heat dissipation device and variable gravity tank

Abstract

The present application relates to a variable gravity cabinet centrifuge heat dissipation device and a variable gravity cabinet, a variable gravity cabinet centrifuge heat dissipation device is used for heat dissipation of two centrifuges arranged relatively spaced apart in a variable gravity cabinet, comprising a refrigeration module, an air inlet pipe, an air return pipe, an air outlet main pipe, an air outlet branch pipe and a air supply power module, the refrigeration module has a first air duct, the refrigeration module is installed between the two centrifuges, the first air duct is vertically arranged through the refrigeration module, the lower end of the air outlet main pipe is connected with the upper end of the first air duct, the upper end of the air outlet main pipe is connected with the middle position of the air outlet branch pipe and is communicated, the air outlet branch pipe is transversely arranged and the air outlets at both ends are respectively arranged obliquely downward above the two centrifuges, the upper end of the air inlet pipe is connected with the lower end of the first air duct, the lower end of the air inlet pipe is communicated with the air outlet of the air supply power module, the air return opening of the air supply power module is communicated with one end of the air return pipe, and the other end of the air return pipe is communicated with the lower part of the centrifuge.

Description

Technical Field

[0001] This invention relates to the technical field of variable gravity cabinets, specifically to a variable gravity cabinet centrifuge heat dissipation device and a variable gravity cabinet. Background Technology

[0002] The variable gravity cabinet used for space rotation experiments has high requirements for structural assembly stability, and the rotating equipment needs to be installed inside the cabinet. Effective heat dissipation of the rotating equipment is also required. However, the assembly space inside the cabinet is limited. Therefore, the various components inside the cabinet need to be reasonably assembled and laid out to ensure both heat dissipation efficiency and reasonable utilization of the assembly space. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a variable gravity centrifuge heat dissipation device and a variable gravity cabinet.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A variable gravity cabinet centrifuge heat dissipation device is used to dissipate heat from two centrifuges arranged relatively at intervals in a variable gravity cabinet. It includes a refrigeration module, an air inlet pipe, a return air pipe, a main air outlet pipe, branch air outlet pipes, and a power supply module. The refrigeration module has a first air duct. The refrigeration module is installed between the two centrifuges. The first air duct vertically penetrates the refrigeration module. The lower end of the main air outlet pipe is connected to the upper end of the first air duct. The upper end of the main air outlet pipe is connected and communicates with the middle position of the branch air outlet pipe. The branch air outlet pipe is arranged horizontally, and its two ends have air outlets that are respectively inclined downwards above the two centrifuges. The upper end of the air inlet pipe is connected to the lower end of the first air duct. The lower end of the air inlet pipe communicates with the air outlet of the power supply module. The return air outlet of the power supply module is connected to one end of the return air pipe, and the other end of the return air pipe is connected to the bottom of the centrifuge.

[0005] The beneficial effects of this invention are as follows: The variable gravity cabinet centrifuge heat dissipation device of this invention is applied to the centrifuge heat dissipation in the variable gravity cabinet. Through a reasonable structural layout, air can be drawn from the bottom to the top of the centrifuge, and the air is cooled to form low temperature air through the first air duct of the refrigeration module. The air is then effectively cooled from top to bottom through the main air outlet pipe and the branch air outlet pipes. The low temperature air becomes high temperature air after passing through the centrifuge. The high temperature air then enters the air supply power module from the bottom of the centrifuge through the return air pipe. The air supply power module provides the air circulation head for the air circulation, so that the left and right areas inside the variable gravity cabinet form heat dissipation circulation air paths respectively. The overall structure is compact, occupies little space, is stable and reliable, and has high heat dissipation efficiency.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the return air duct includes a first return air duct and a second return air duct. One end of the first return air duct is located below a centrifuge, and one end of the second return air duct is located below another centrifuge. The other end of the first return air duct is connected to and communicates with the middle of the second return air duct, and the other end of the second return air duct extends downward and communicates with the return air inlet of the air supply power module.

[0008] The beneficial effect of adopting the above-mentioned further solution is that by using two return air ducts, the two centrifuges can be effectively returned air.

[0009] Furthermore, one end of the first return air duct has an upward-facing first port, and one end of the second return air duct has an upward-facing second port; the first return air duct is horizontally arranged in front of the air inlet duct, and the other end of the first return air duct is located to the left rear of the first port; the second return air duct is horizontally arranged to the lower left of the air inlet duct and adjacent to another centrifuge.

[0010] The beneficial effects of adopting the above-mentioned further solution are: by rationally arranging the two return air ducts, the space occupied is small and the structure is compact. Within a limited space, the return air can be effectively returned to the air supply power module along the shortest path.

[0011] Furthermore, both ends of the air outlet branch pipe are arc-shaped structures; the upper part of the air outlet main pipe is an arc-shaped structure and extends horizontally forward at the upper end.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting an arc-shaped structure, it is convenient to arrange both ends of the air outlet branch pipe above the centrifuge.

[0013] Furthermore, the air supply power module includes a gas-liquid heat exchanger and a fan. The gas-liquid heat exchanger has a second air duct. The air inlet of the second air duct is connected to the air return port of the fan. The air outlet of the second air duct is connected to the lower end of the air inlet pipe. The air return port of the fan is connected to one end of the air return pipe.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by setting up a gas-liquid heat exchanger and a fan, the return air can undergo preliminary heat exchange through the gas-liquid heat exchanger before entering the refrigeration module, thereby further reducing the air temperature.

[0015] Furthermore, a mounting block is provided below the refrigeration module. The lower end of the air inlet pipe and one end of the air return pipe are respectively connected and fixed to the rear side of the mounting block. The mounting block is provided with a first interface and a second interface that are arranged side by side and pass through each other. The lower end of the air inlet pipe is connected and communicates with the air outlet of the air supply power module through the first interface, and one end of the air return pipe is connected and communicates with the air return port of the air supply power module through the second interface. A sliding rail extending forward and backward is fixed on the left and right sides of the mounting block respectively.

[0016] The beneficial effects of adopting the above-mentioned further solution are: by setting the mounting block, it is convenient to effectively assemble the air inlet pipe and return pipe with the air supply power module, and it is also convenient to separate the air supply power module from the air inlet pipe and return pipe.

[0017] Furthermore, both the first and second interfaces are covered with metal filters, and O-rings are provided on the connection surfaces of the first and second interfaces and the air supply power module.

[0018] Furthermore, the refrigeration module includes an air-cooled heat exchanger, a TEC refrigeration module, and a heat dissipation plate. A first air duct is formed inside the air-cooled heat exchanger. TEC refrigeration modules are provided on the left and right opposite side walls of the air-cooled heat exchanger. The cold end of the TEC refrigeration module is in contact with the air-cooled heat exchanger, and the hot end of the TEC refrigeration module is in contact with the heat dissipation plate.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the heat dissipation effect is better when using a TEC cooling module.

[0020] A variable gravity cabinet includes a centrifuge heat dissipation device as described above, and a cabinet body. Centrifuges are respectively installed on the left and right side walls of the cabinet body. The refrigeration module is installed in the middle of the rear side of the cabinet body. The lower left side of the cabinet body has a front-to-back assembly channel. A thermal control drawer is slidably installed in the assembly channel. The air supply power module is installed in the thermal control drawer. The thermal control drawer also has a fluid circulation module that provides liquid cooling fluid to the refrigeration module.

[0021] The beneficial effects of the present invention are: the variable gravity cabinet of the present invention has a reasonable overall heat dissipation device layout, which does not hinder the normal operation of the centrifuge and other loads, and can effectively dissipate heat from the centrifuge while occupying as little space as possible.

[0022] Furthermore, the cabinet is equipped with an assembly panel, which is located below the refrigeration module and the centrifuge, and separates the centrifuge from the thermal control drawer; the middle part of the return air duct is fixedly connected to the assembly panel by a clamp, and the other end of the return air duct is fixedly connected to the assembly panel by a support plate.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the return air duct can be stably assembled with the inside of the cabinet by using clamps and support plates. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the variable gravity cabinet centrifuge heat dissipation device of the present invention. Figure 1 ;

[0025] Figure 2 This is a three-dimensional structural diagram of the variable gravity cabinet centrifuge heat dissipation device of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the main structure of the variable gravity cabinet centrifuge heat dissipation device of the present invention;

[0027] Figure 4 This is a schematic diagram of the main structure of the variable gravity cabinet of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of a portion of the variable gravity cabinet of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the variable gravity cabinet part of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 100. Refrigeration module; 101. Air inlet duct; 102. Main air outlet duct; 103. Branch air outlet duct; 104. First return air duct; 105. Second return air duct; 106. Mounting block; 107. First interface; 108. Second interface; 109. Slide rail; 110. First port; 111. Second port; 112. TEC refrigeration module; 113. Heat dissipation plate; 114. Air-cooled heat exchanger; 115. Electrical control board;

[0032] 200. Cabinet body; 201. Heat-controlled drawer; 202. Assembly panel; 203. Clamp; 204. Support plate. Detailed Implementation

[0033] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] like Figures 1-6 As shown in this embodiment, a centrifuge cooling device for a variable gravity cabinet is used to dissipate heat from two centrifuges arranged at relatively intervals in a variable gravity cabinet. It includes a cooling module 100, an air inlet duct 101, a return air duct, a main air outlet duct 102, branch air outlet ducts 103, and a power supply module. The cooling module 100 has a first air duct and is installed between the two centrifuges. The first air duct vertically penetrates the cooling module 100. The lower end of the main air outlet duct 102 is connected to the first air outlet duct. The upper end of the duct is connected to the middle position of the main air outlet duct 102 and the middle position of the branch air outlet duct 103. The branch air outlet duct 103 is arranged horizontally and the air outlets at both ends are arranged obliquely downward above the two centrifuges. The upper end of the air inlet duct 101 is connected to the lower end of the first air duct. The lower end of the air inlet duct 101 is connected to the air outlet of the air supply power module. The return air outlet of the air supply power module is connected to one end of the return air duct. The other end of the return air duct is connected to the bottom of the centrifuge.

[0035] In this embodiment, the main air outlet duct 102 and the branch air outlet duct 103 can be made of aluminum alloy plate-fin heat exchangers. To achieve weight reduction and noise reduction, the remaining air ducts can be supported by carbon fiber materials. Carbon fiber pipes are high-strength, lightweight, flexible in molding, and highly designable. They can be designed and processed into the required shapes according to the spatial layout. Furthermore, carbon fiber materials have excellent high-temperature resistance, low-temperature resistance, and corrosion resistance, making them suitable for air ductwork. The inner diameter of the carbon fiber pipe is guaranteed to be Φ65mm according to the thermal control design requirements, with a wall thickness of 1mm. The air duct assembly is fixed to the main cabinet structure with screws via brackets.

[0036] like Figures 1-3 As shown, the return air duct in this embodiment includes a first return air duct 104 and a second return air duct 105. One end of the first return air duct 104 is located below one centrifuge, and one end of the second return air duct 105 is located below another centrifuge. The other end of the first return air duct 104 is connected to and communicates with the middle of the second return air duct 105, and the other end of the second return air duct 105 extends downward and communicates with the return air inlet of the air supply power module. Using two return air ducts allows for effective return air to both centrifuges.

[0037] like Figures 1-6 As shown, in this embodiment, one end of the first return air duct 104 has an upward-facing first port 110, and one end of the second return air duct 105 has an upward-facing second port 111. The first return air duct 104 is horizontally arranged in front of the air inlet duct 101, and the other end of the first return air duct 104 is located to the left rear of the first port 110. The second return air duct 105 is horizontally arranged to the lower left of the air inlet duct 101 and adjacent to another centrifuge. By rationally arranging the two return air ducts, the space occupied is small and the structure is compact. Within a limited space, the return air can be effectively returned to the air supply power module along the shortest path.

[0038] like Figures 1-4 As shown, in this embodiment, both ends of the air outlet branch pipe 103 are arc-shaped structures; the upper part of the air outlet main pipe 102 is an arc-shaped structure and extends horizontally forward at the upper end. By setting the arc-shaped structure, it is convenient to arrange both ends of the air outlet branch pipe above the centrifuge.

[0039] In one specific embodiment, the air supply power module includes a gas-liquid heat exchanger and a fan. The gas-liquid heat exchanger has a second air duct, the air inlet of which is connected to the air return outlet of the fan, and the air outlet of which is connected to the lower end of the air inlet pipe 101. The air return outlet of the fan is connected to one end of the air return pipe. By setting up the gas-liquid heat exchanger and the fan, the return air can undergo preliminary heat exchange through the gas-liquid heat exchanger before entering the refrigeration module, further reducing the air temperature.

[0040] like Figures 1-3 As shown, in this embodiment, a mounting block 106 is provided below the refrigeration module 100. The lower end of the air inlet pipe 101 and one end of the return air pipe are respectively connected and fixed to the rear side of the mounting block 106. The mounting block 106 is provided with a first interface 107 and a second interface 108 that are arranged side by side and pass through each other. The lower end of the air inlet pipe 101 is connected and communicates with the air outlet of the air supply power module through the first interface 107, and one end of the return air pipe is connected and communicates with the return air outlet of the air supply power module through the second interface 108. A sliding rail 109 extending front to back is fixed on the left and right sides of the mounting block 106 respectively. By setting up the mounting block, it is convenient to effectively assemble the air inlet pipe and the return air pipe with the air supply power module, and it is also convenient to separate the air supply power module from the air inlet pipe and the return air pipe.

[0041] One specific solution in this embodiment is as follows: Figures 1-3 As shown, the air inlet pipe 101 can adopt a multiple bending structure. The lower end of the air inlet pipe 101 first extends to the left, then extends downward, and finally extends forward to be fixedly connected to the first interface 107 on the mounting block 106; the lower end of the second return air pipe 105 first extends downward, then extends backward, then extends downward again, and finally extends forward to be fixedly connected to the second interface 108 on the mounting block 106.

[0042] like Figure 1 and Figure 2 As shown, in this embodiment, both the first interface 107 and the second interface 108 are covered with metal filters, and O-rings are provided on the connection surfaces of the first interface 107 and the second interface 108 with the air supply power module. Metal filters can also be installed at both ends of the air outlet branch pipe to prevent foreign objects from entering the pipe and to minimize air resistance.

[0043] like Figure 1 and Figure 2 As shown, the refrigeration module 100 in this embodiment includes an air-cooled heat exchanger 114, a TEC refrigeration module 112, and a heat dissipation plate 113. A first air duct is formed within the air-cooled heat exchanger 114. TEC refrigeration modules 112 are provided on both the left and right opposite side walls of the air-cooled heat exchanger 114. The cold end of the TEC refrigeration module 112 is in contact with the air-cooled heat exchanger 114 through thermally conductive ester, and the hot end of the TEC refrigeration module 112 is in contact with the heat dissipation plate 113 through thermally conductive ester. Using a TEC refrigeration module provides better heat dissipation. The TEC refrigeration module can be a semiconductor cooler, specifically implemented using existing conventional technology. The cold end of the semiconductor cooler is thermally conductively mounted to the outer surface of the air-cooled heat exchanger, and the hot end carries away heat through the heat dissipation plate, ensuring the normal operation of the TEC.

[0044] The centrifuge cooling device in this embodiment is used for cooling the centrifuge in a variable gravity cabinet. Through a reasonable structural layout, air can be drawn from the bottom to the top of the centrifuge. The air is cooled to a low temperature by passing through the first air duct of the refrigeration module. It then effectively dissipates heat from top to bottom to the centrifuge and its load through the main exhaust pipe and branch exhaust pipes. The low temperature air becomes high temperature air after passing through the centrifuge. The high temperature air then enters the air supply power module from the bottom of the centrifuge through the return air pipe. The air supply power module provides the air circulation head for the air circulation, so that the left and right areas inside the variable gravity cabinet form heat dissipation circulation air paths respectively. The overall structure is compact, occupies little space, is stable and reliable, and has high heat dissipation efficiency.

[0045] like Figures 4-6 As shown, a variable gravity cabinet in this embodiment includes the aforementioned variable gravity cabinet centrifuge heat dissipation device and a cabinet body 200. Centrifuges are respectively installed on the left and right side walls inside the cabinet body 200. The refrigeration module 100 is installed in the middle of the rear side of the cabinet body 200. The lower left side of the cabinet body 200 is provided with a front-to-back assembly channel. A thermal control drawer 201 is slidably installed in the assembly channel. The air supply power module is installed in the thermal control drawer 201. The thermal control drawer 201 is also provided with a fluid circulation module that provides liquid cooling fluid to the refrigeration module 100.

[0046] Furthermore, such as Figure 1 and Figure 2 As shown, an electronic control board 115 can also be installed in front of the air-cooled heat exchanger 114. The electronic control board 115 is connected to two TEC refrigeration modules 112 respectively. The electronic control board 115 can be used to supply power and measure temperature of the TEC refrigeration modules 112.

[0047] like Figures 4-6 As shown, the cabinet 200 in this embodiment is equipped with an assembly panel 202. The assembly panel 202 is located below the refrigeration module 100 and the centrifuge, separating the centrifuge from the thermal control drawer 201. The middle part of the return air duct is fixedly connected to the assembly panel 202 by a clamp 203, and the other end of the return air duct is fixedly connected to the assembly panel 202 by a support plate 204. The clamp and support plate can be used to stably assemble the return air duct into the cabinet.

[0048] Specifically, such as Figures 1-3 and Figure 6As shown, the support plate 204 can adopt a Z-shaped structure, with its upper and lower ends staggered. The upper end of the support plate 204 can be fixedly connected to the end face of the first port 110 or the second port 111, and the lower end of the support plate 204 can be fixedly connected to the upper surface of the assembly panel 202. At least two vertically arranged support plates 204 are respectively provided on the first port 110 and the second port 111, which facilitates the stable fixing of these two ports below the centrifuge.

[0049] like Figure 5 and Figure 6 As shown, in this embodiment, the first return air duct 104 is arranged at an angle on the assembly panel 202, while the clamp 203 is located in the middle of the assembly panel 202 and faces the refrigeration module. The hot air from the bottom of a centrifuge is drawn through the first return air duct 104 to the second return air duct 105, and then the return hot air is sent to the second interface through the second return air duct 105. This concentrates the entire air path at the top and lower left of the cabinet, which facilitates the connection with the air supply power module in the thermal control drawer. It also frees up space for the controller drawer on the right, making the internal structural layout of the entire cabinet more reasonable.

[0050] In this embodiment, the variable gravity cabinet provides refrigerant to the liquid cooling system via a fluid circulation module within the thermal control drawer 201. This refrigerant flows through a gas-liquid heat exchanger and a cooling plate to provide cooling capacity to the circulating airflow. The pressure head of the circulating airflow is provided by a fan, and the airflow passes from bottom to top through an air-cooled heat exchanger, effectively cooling the centrifuges from above. The air then returns from below the centrifuges, effectively cooling the two centrifuges on both sides of the cabinet without interference between them. Each branch in this embodiment is equipped with a gas temperature sensor at its inlet and outlet to monitor the internal air temperature. The temperature sensors can be fixed to the ductwork with screws.

[0051] This embodiment of the variable gravity cabinet has two main parts: a liquid cooling system and an air cooling system. The flow meter, valves, gas-liquid heat exchanger, fan, temperature sensor, and other components of the liquid cooling system are integrated into a thermal control drawer. The thermal control drawer functions to provide pressure head for the air circuit, heat delivery between the air circuit and the liquid circuit, and flow distribution and regulation for the water circuit. The air circuit is located inside the rotating test area. After the fan starts, it drives low-temperature air through a three-way outlet duct, which then flows to the two centrifuges and the load module. The air in the air circuit collects heat from the scientific load and flows through the return air duct, ultimately exchanging heat with the heat exchanger and becoming low-temperature air again, thus providing heat dissipation for the rotating test area. Simultaneously, under harsh operating conditions, the TEC cooling module on the rising section of the inlet duct is activated to further reduce the air temperature.

[0052] The variable gravity cabinet in this embodiment has a reasonable overall heat dissipation device layout, which does not hinder the normal operation of the centrifuge and other loads, and can effectively dissipate heat from the centrifuge while occupying as little space as possible.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A heat dissipation device for a variable gravity centrifuge, characterized in that, This device is used to dissipate heat from two centrifuges arranged at relative intervals in a variable gravity cabinet. It includes a refrigeration module, an air inlet duct, a return air duct, a main air outlet duct, branch air outlet ducts, and a power supply module. The refrigeration module has a first air duct and is installed between the two centrifuges. The first air duct vertically runs through the refrigeration module. The lower end of the main air outlet duct is connected to the upper end of the first air duct, and the upper end of the main air outlet duct is connected to the middle of the branch air outlet duct. The branch air outlet duct is arranged horizontally, with its two end outlets angled downwards and positioned above the two centrifuges. The upper end of the air inlet duct is connected to the lower end of the first air duct, and the lower end of the air inlet duct is connected to the air outlet of the power supply module. The return air outlet of the power supply module is connected to one end of the return air duct, and the other end of the return air duct is connected to the bottom of the centrifuges. The return air duct includes a first return air duct and a second return air duct. One end of the first return air duct is located below a centrifuge, and one end of the second return air duct is located below another centrifuge. The other end of the first return air duct is connected to and communicates with the middle of the second return air duct, and the other end of the second return air duct extends downward and communicates with the return air inlet of the air supply power module. A mounting block is provided below the refrigeration module. The lower end of the air inlet pipe and one end of the air return pipe are respectively connected and fixed to the rear side of the mounting block. The mounting block is provided with a first interface and a second interface that are arranged side by side and pass through each other. The lower end of the air inlet pipe is connected to the air outlet of the air supply power module through the first interface and is in communication. One end of the air return pipe is connected to the air return port of the air supply power module through the second interface and is in communication. A sliding rail extending forward and backward is fixed on the left and right sides of the mounting block respectively.

2. The variable gravity centrifuge cooling device according to claim 1, characterized in that, The first return air duct has an upward-facing first port at one end, and the second return air duct has an upward-facing second port at one end; the first return air duct is horizontally arranged in front of the air inlet duct, and the other end of the first return air duct is located to the left rear of the first port; the second return air duct is horizontally arranged to the lower left of the air inlet duct and adjacent to another centrifuge.

3. The variable gravity centrifuge cooling device according to claim 1, characterized in that, Both ends of the air outlet branch pipe are arc-shaped structures; the upper part of the air outlet main pipe is an arc-shaped structure and extends horizontally forward at the upper end.

4. The variable gravity centrifuge cooling device according to claim 1, characterized in that, The air supply power module includes a gas-liquid heat exchanger and a fan. The gas-liquid heat exchanger has a second air duct. The air inlet of the second air duct is connected to the air return port of the fan. The air outlet of the second air duct is connected to the lower end of the air inlet pipe. The air return port of the fan is connected to one end of the air return pipe.

5. The variable gravity centrifuge cooling device according to claim 1, characterized in that, Both the first and second interfaces are covered with metal filters, and O-rings are provided on the connection surfaces of the first and second interfaces and the air supply power module.

6. The variable gravity centrifuge cooling device according to claim 1, characterized in that, The refrigeration module includes an air-cooled heat exchanger, a TEC refrigeration module, and a heat dissipation plate. A first air duct is formed inside the air-cooled heat exchanger. TEC refrigeration modules are provided on the left and right opposite side walls of the air-cooled heat exchanger. The cold end of the TEC refrigeration module is in contact with the air-cooled heat exchanger, and the hot end of the TEC refrigeration module is in contact with the heat dissipation plate.

7. A variable gravity cabinet, characterized in that, The variable gravity cabinet centrifuge heat dissipation device according to any one of claims 1 to 6 further includes a cabinet, on which centrifuges are respectively installed on the left and right side walls of the cabinet, the refrigeration module is installed in the middle of the rear side of the cabinet, and an assembly channel arranged front and back is provided on the lower left side of the cabinet. A thermal control drawer is slidably installed in the assembly channel, and the air supply power module is installed in the thermal control drawer; the thermal control drawer is also provided with a fluid circulation module that provides liquid cooling fluid for the refrigeration module.

8. The variable gravity cabinet according to claim 7, characterized in that, The cabinet is equipped with an assembly panel, which is located below the refrigeration module and the centrifuge, and separates the centrifuge from the thermal control drawer; the middle part of the return air duct is fixedly connected to the assembly panel by a clamp, and the other end of the return air duct is fixedly connected to the assembly panel by a support plate.

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