Dry-wet separation pump-driven two-phase heat exchange device for cabinet

Abstract

The invention discloses a dry-wet separation pump-driven two-phase heat exchange device for a cabinet, and belongs to the technical field of heat dissipation of electronic equipment. The device comprises a rear door, a cover plate, a housing, a condensation heat exchange module, a liquid phase pipeline, a liquid storage device, a liquid supply pipeline, a steam return pipeline and a control module, the device is installed on the back of the cabinet, a working medium enters the liquid supply pipeline under driving of a magnetic drive pump, a cooling working medium is provided for the cabinet through a liquid phase quick connector, and the cooling working medium absorbs heat in a heating device cold plate to generate phase change. And the formed two-phase working medium enters a steam return pipeline through a steam-phase quick connector, then enters a condensation module to exchange heat with external cooling liquid, is condensed into a liquid-phase working medium, finally flows through a liquid-phase pipeline and a liquid storage device under the driving of a magnetic pump, and provides a cooling working medium for the cabinet through a liquid-phase quick connector. The condensation module is spatially isolated from the interior of the cabinet, so that internal and external dry-wet separation is realized, and the risk that electronic equipment in the cabinet is burnt due to leakage of cooling water is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of electronic equipment, and in particular to a dry-wet separation pump-driven two-phase heat exchange device for a cabinet. Background Art

[0002] As one of the important components of radar, the cabinet is responsible for signal processing, scheduling, power supply, cooling and other functions. With the increasing demand for radar functions and performance, the power consumption inside the cabinet is also increasing. Traditional air cooling is increasingly difficult to meet the cooling needs of high heat consumption modules inside the cabinet, and liquid cooling has the risk of leakage. Two-phase cooling is considered to be one of the effective ways to solve the cooling needs of high power density cabinets.

[0003] Invention patent CN201910586668.1 discloses a pump-driven two-phase loop cooling system for high-power density cabinets. The system can dissipate heat for the main heating elements of the server, effectively solving the problem of local hot spots in the server and cabinet, and using micro-channel flow boiling heat exchange technology to significantly improve the power density of the server in a single cabinet and reduce the cabinet cooling fan noise. However, when the invention is applied to cabinets with different power densities, it cannot self-regulate the flow rate, which will reduce the heat exchange efficiency, and the heat exchanger is not isolated from the inside of the cabinet, which poses a risk of leakage. Invention patent CN202111654843.X discloses a pump-driven two-phase liquid-cooled heat dissipation cabinet, which uses a fluid quick connector with a guide rail assembly structural design to achieve modular installation and use of the liquid-cooled heat dissipation cabinet. The invention focuses on the installation and ease of use of the cabinet, and does not actually improve the heat dissipation performance.

[0004] Furthermore, in the prior art, the dry-wet separation pump-driven two-phase heat exchange device is limited by space conditions, and the internal components are arranged in the same space. There is a lack of isolation devices. If leakage occurs, it is easy to cause the equipment to burn. Summary of the invention

[0005] The present application provides a dry-wet separation pump-driven two-phase heat exchange device for a cabinet, which can be used to solve the technical problem of the lack of an isolation device in a dry-wet separation pump-driven two-phase heat exchange device. The present invention achieves dry-wet separation by isolating the condensing heat exchange module from the cabinet in space, avoiding the risk of equipment burning due to leakage, and adjusting the valve opening of the liquid supply pipeline by detecting the dryness of the two-phase working fluid to match the heat dissipation requirements of cabinets with different power densities, thereby achieving efficient heat exchange.

[0006] The present application provides a dry-wet separation pump-driven two-phase heat exchange device for a cabinet, the device comprising a rear door, a cover plate, a cover shell, a condensation heat exchange module, a liquid phase pipeline, a liquid reservoir, a liquid supply pipeline, a steam return pipeline, and a control module;

[0007] The cover plate includes a lower cover plate, a middle cover plate, and an upper cover plate;

[0008] The condensation heat exchange module includes a safety valve, a filling valve, a condensation outlet pipeline, a condensation inlet pipeline, a coolant outlet pipeline, a coolant inlet pipeline, and a condenser, and is installed at the bottom of the outer side of the rear door and is sealed and isolated from the components inside the rear door through the rear door bottom plate;

[0009] The liquid phase pipeline includes a magnetic pump and a flow sensor;

[0010] The liquid supply pipeline includes a liquid phase quick connector, a regulating valve, and a filter;

[0011] The steam return pipeline includes a steam phase quick connector and a dryness detector;

[0012] The control module is installed on the top of the inner side of the rear door, and is sealed and isolated from the liquid phase pipeline, liquid reservoir, liquid supply pipeline, and steam return pipeline installed on the bottom of the inner side of the rear door by the rear door internal baffle;

[0013] The liquid outlet of the liquid reservoir is connected to the liquid phase pipeline inlet, the liquid phase pipeline outlet is connected to the liquid supply pipeline inlet, the liquid supply pipeline outlet is connected to the heat dissipation cold plate inlet inside the cabinet through a liquid phase quick connector, the heat dissipation cold plate outlet inside the cabinet is connected to the return steam pipeline inlet through a vapor phase quick connector, the return steam pipeline outlet is connected to the condensation inlet pipeline in the condensation heat exchange module, and the condensation outlet pipeline in the condensation heat exchange module is connected to the liquid reservoir inlet, forming a circulation loop of the entire device.

[0014] Furthermore, the rear door is installed on the back of the cabinet, and the two-phase heat exchange device is isolated from the heating components inside the cabinet by the middle cover and the upper cover. Only the liquid phase quick connector and the vapor phase quick connector are exposed through the preset through holes in the middle cover to connect with the heat dissipation cold plate inside the cabinet.

[0015] Furthermore, the lower limit value of the valve position of the regulating valve is 0 scale, corresponding to the fully closed state, and the upper limit value of the valve position is 100 scale, corresponding to the fully open state, and the positioning accuracy is 1 scale.

[0016] Furthermore, the dryness detector feeds back the reflux steam dryness signal to the control module, and the control module controls the opening of the regulating valve according to the signal. When the reflux steam dryness is less than 0.3, the valve position is roughly adjusted to 30. If the degree is still less than 0.3 after running for 30 seconds, the valve position is reduced at a rate of 1 scale per second until the dryness is greater than 0.3.

[0017] When the dryness of the reflux steam is greater than 0.7, the valve position is roughly adjusted to 70. If the degree is still greater than 0.7 after running for 30 seconds, the valve position increases at a rate of 1 scale per second until the dryness is less than 0.7. The flow rate is adjusted by the valve opening to adapt to the heat dissipation of devices with different power densities.

[0018] Furthermore, the lower cover plate and the rear door are sealed by a sealing strip.

[0019] Furthermore, the upper cover plate is partially hollowed out to facilitate heat dissipation of the control module.

[0020] Furthermore, the magnetic pump is installed in the liquid phase pipeline of the liquid reservoir outlet.

[0021] Furthermore, the safety valve and the filling valve are installed at the condensation outlet pipeline or the condensation inlet pipeline.

[0022] Furthermore, the fluid inside the coolant outlet pipeline and the coolant inlet pipeline is deionized water or aviation coolant, and the cooling medium provided to the cabinet by the liquid phase quick connector is Freon.

[0023] Furthermore, the inner diameter of the liquid phase pipeline ranges from 6 to 12 mm.

[0024] Compared with the prior art, the present invention has the following significant advantages:

[0025] (1) The cabinet dry-wet separation pump-driven two-phase heat exchange device of the present invention realizes internal and external dry-wet separation by isolating the condensing module from the interior of the cabinet, thereby avoiding the risk of liquid leakage and burning the modules inside the cabinet.

[0026] (2) The dry-wet separation pump-driven two-phase heat exchange device for the cabinet of the present invention detects the dryness of the reflux steam and feeds back the signal to the control module, which then controls the opening of the regulating valve in the liquid supply pipeline through the control module, adjusts the liquid supply flow rate to adapt to different power densities, and realizes efficient phase change heat dissipation under different working conditions.

[0027] (3) The dry-wet separation pump-driven two-phase heat exchange device for the cabinet of the present invention is connected to the heat dissipation cold plate inside the cabinet through a quick connector. The self-sealing function of the quick connector can realize the rapid disassembly and assembly of the two-phase heat exchanger without leaking the internal working fluid.

[0028] (4) After the dry-wet separation pump-driven two-phase heat exchange device for the cabinet of the present invention is assembled with the cabinet, filling and recovery only require the removal of the cover, which is easy to operate.

[0029] (5) The cabinet dry-wet separation pump driven two-phase heat exchange device of the present invention limits the maximum internal pressure through a safety valve. When the internal pressure reaches the set value, the pressure is released, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a dry-wet separation pump-driven two-phase heat exchange device for a cabinet of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the dry-wet separation pump-driven two-phase heat exchange device for a cabinet of the present invention after removing the cover;

[0032] Figure 3It is a structural schematic diagram of the dry-wet separation pump-driven two-phase heat exchange device for a cabinet of the present invention after the cover plate is removed.

[0033] Among them, the serial numbers in the figure are: 1, rear door; 2, cover plate; 3, cover shell; 4, condensation heat exchange module; 5, liquid phase pipeline; 6, liquid reservoir; 7, liquid supply pipeline; 8, steam return pipeline; 9, control module; 201, lower cover plate; 202, middle cover plate; 203, upper cover plate; 401, safety valve; 402, filling valve; 403, condensation outlet pipeline; 404, condensation inlet pipeline; 405, coolant outlet pipeline; 406, coolant inlet pipeline; 407, condenser; 501, magnetic pump; 502, flow sensor; 701, liquid phase quick connector; 702, regulating valve; 703, filter; 801, vapor phase quick connector; 802, dryness detector. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0035] Combination Figures 1 to 3 , including a rear door 1, a cover plate 2, a cover shell 3, a condensation heat exchange module 4, a liquid phase pipeline 5, a liquid reservoir 6, a liquid supply pipeline 7, a steam return pipeline 8, and a control module 9;

[0036] The cover plate 2 includes a lower cover plate 201, a middle cover plate 202, and an upper cover plate 203;

[0037] The condensation heat exchange module 4 includes a safety valve 401, a filling valve 402, a condensation outlet pipeline 403, a condensation inlet pipeline 404, a coolant outlet pipeline 405, a coolant inlet pipeline 406, and a condenser 407, which is installed at the outer bottom of the rear door 1 and is sealed and isolated from the components inside the rear door through the rear door bottom plate; the condensation inlet pipeline 404 is arranged at the upper end of one side of the condensation heat exchange module 4, and the coolant outlet pipeline 405 is arranged at the lower end; the condensation outlet pipeline 403 is arranged at the upper end of the other side of the condensation heat exchange module 4, and the coolant inlet pipeline 406 is arranged at the lower end;

[0038] The liquid phase pipeline 5 includes a magnetic pump 501 and a flow sensor 502;

[0039] The liquid supply pipeline 7 includes a liquid phase quick connector 701, a regulating valve 702, and a filter 703;

[0040] The steam return pipeline 8 includes a steam phase quick connector 801 and a dryness detector 802; the control module 9 is installed at the top of the inner side of the rear door 1, and is sealed and isolated from the liquid phase pipeline 5, liquid reservoir 6, liquid supply pipeline 7, and steam return pipeline 8 installed at the bottom of the inner side of the rear door 1 through the internal baffle of the rear door 1.

[0041] The liquid outlet of the liquid reservoir 6 is connected to the inlet of the liquid phase pipeline 5, the outlet of the liquid phase pipeline 5 is connected to the inlet of the liquid supply pipeline 7, the outlet of the liquid supply pipeline 7 is connected to the inlet of the heat dissipation cold plate inside the cabinet through a liquid phase quick connector 701, the outlet of the heat dissipation cold plate inside the cabinet is connected to the inlet of the return steam pipeline 8 through a vapor phase quick connector 801, the outlet of the return steam pipeline 8 is connected to the condensation inlet pipeline 404 in the condensation heat exchange module 4, and the condensation outlet pipeline 403 in the condensation heat exchange module 4 is connected to the inlet of the liquid reservoir 6, forming a circulation loop of the entire device.

[0042] The rear door 1 is installed on the back of the cabinet. After installation, the two-phase heat exchange device is isolated from the heating components inside the cabinet by the middle cover 202 and the upper cover 203. Only the liquid phase quick connector 701 and the vapor phase quick connector 801 are exposed through the preset through holes on the middle cover 202 and connected to the heat dissipation cold plate inside the cabinet.

[0043] The present invention seals most of the components through the baffle of the rear door. For the components that must be connected to the heat dissipation cold plate, a baffle is set, and a through hole is set on the baffle, so that only the liquid phase quick connector and the vapor phase quick connector are connected to the heat dissipation cold plate inside the cabinet, thereby avoiding direct contact between the heat exchange device and the inside of the cabinet to the greatest extent, isolating the two in different spaces, thereby avoiding the risk of liquid leakage and burning the modules inside the cabinet.

[0044] The lower limit value of the valve position of the regulating valve 702 is 0 scale, corresponding to the fully closed state, and the upper limit value of the valve position is 100 scale, corresponding to the fully open state, and the positioning accuracy is 1 scale.

[0045] The dryness detector 802 feeds back the reflux steam dryness signal to the control module 9. The control module 9 controls the opening of the regulating valve 702 according to the signal. When the reflux steam dryness is less than 0.3, the valve position is roughly adjusted to 30. If the dryness is still less than 0.3 after running for 30 seconds, the valve position reduces the valve opening at a rate of 1 scale per second until the dryness is greater than 0.3; when the reflux steam dryness is greater than 0.7, the valve position is roughly adjusted to 70. If the dryness is still greater than 0.7 after running for 30 seconds, the valve position increases the valve opening at a rate of 1 scale per second until the dryness is less than 0.7. The flow rate is adjusted by the valve opening to adapt to the heat dissipation of devices with different power densities.

[0046] The present invention collects the reflux steam dryness signal through the dryness detector, and sets different control modes of the control module under different flow steam dryness signals, so as to accurately adjust the valve position. The regulating valve is set with 100 adjustment gears, and the unit adjustment accuracy is 1. The adjustment range is wide and the accuracy is accurate, so that the flow rate matches the heat dissipation of devices with different power densities, and the heat dissipation effect is optimal, avoiding the problem that the fixed flow rate matches different heat dissipation requirements, cannot be adjusted, and cannot play the best heat exchange effect.

[0047] The lower cover plate 201 and the rear door 1 are sealed by a sealing strip.

[0048] The upper cover plate 203 has a partially hollow structure to facilitate heat dissipation of the control module 9 .

[0049] The magnetic pump 501 is installed at the liquid phase pipeline 5 at the outlet of the liquid storage tank 6 .

[0050] The safety valve 401 and the filling valve 402 are installed on the condensation outlet pipeline 403 or the condensation inlet pipeline 404 .

[0051] The fluid inside the coolant outlet pipeline 405 and the coolant inlet pipeline 406 is deionized water or aviation coolant, and the cooling medium provided to the cabinet by the liquid phase quick connector 701 is Freon.

[0052] The rear door height is 800-1600mm, the width is 400-800mm, the thickness is 80-140mm, the cover thickness is 1-3mm, the inner diameter range of the liquid phase pipeline is 6-12mm, the inner diameter of the liquid supply pipeline is 6-12mm, the inner diameter of the return steam pipeline is 10-30mm, the height of the liquid reservoir is 100-250mm, and the inner diameter of the liquid reservoir is 50-130mm.

[0053] The working process of the dry-wet separation pump driven two-phase heat exchange device for the cabinet of the present invention is as follows:

[0054] The device is installed on the back of the cabinet. The working fluid enters the liquid supply pipeline driven by the magnetic pump, and provides cooling working fluid to the cabinet through the liquid phase quick connector. The cooling working fluid absorbs heat in the cold plate of the heating device and undergoes phase change. The two-phase working fluid formed enters the return steam pipeline through the vapor phase quick connector, and then enters the condensation module to exchange heat with the external coolant. The two-phase working fluid condenses into a liquid working fluid, and finally flows through the liquid reservoir and liquid phase pipeline driven by the magnetic pump, and finally provides cooling working fluid to the cabinet through the liquid phase quick connector to complete a cycle. In this process, because the condensation module is spatially isolated from the inside of the cabinet, the dry and wet separation inside and outside is achieved, avoiding the risk of cooling water leakage and burning the electronic equipment inside the cabinet. In addition, the power density of the cabinet can vary from 0 to 10kW. The dryness detector in the return steam pipeline detects the dryness of the reflux steam and feeds back the signal to the control module, and then controls the opening of the regulating valve in the liquid supply pipeline through the control module to adjust the liquid supply flow to adapt to different power densities, thereby ensuring efficient heat exchange inside the cabinet.

[0055] The above-described embodiments of the present application do not constitute a limitation on the protection scope of the present application.

Claims

1. A dry-wet separation pump-driven two-phase heat exchange device for a cabinet, characterized in that: The device comprises a rear door (1), a cover plate (2), a housing (3), a condensation heat exchange module (4), a liquid phase pipeline (5), a liquid storage device (6), a liquid supply pipeline (7), a steam return pipeline (8), and a control module (9); The cover plate (2) comprises a lower cover plate (201), a middle cover plate (202), and an upper cover plate (203); The condensation heat exchange module (4) comprises a safety valve (401), a filling valve (402), a condensation outlet pipeline (403), a condensation inlet pipeline (404), a coolant outlet pipeline (405), a coolant inlet pipeline (406), and a condenser (407), and is installed at the bottom of the outer side of the rear door (1) and is sealed and isolated from the components inside the rear door through the rear door bottom plate; The liquid phase pipeline (5) includes a magnetic pump (501) and a flow sensor (502); The liquid supply pipeline (7) comprises a liquid phase quick connector (701), a regulating valve (702), and a filter (703); The steam return pipeline (8) includes a steam phase quick connector (801) and a dryness detector (802); The control module (9) is installed at the top of the inner side of the rear door (1), and is sealed and isolated from the liquid phase pipeline (5), the liquid storage tank (6), the liquid supply pipeline (7), and the steam return pipeline (8) installed at the bottom of the inner side of the rear door (1) through the internal baffle of the rear door (1); The liquid outlet of the liquid storage device (6) is connected to the inlet of the liquid phase pipeline (5), the outlet of the liquid phase pipeline (5) is connected to the inlet of the liquid supply pipeline (7), the outlet of the liquid supply pipeline (7) is connected to the inlet of the heat dissipation cold plate inside the cabinet through a liquid phase quick connector (701), the outlet of the heat dissipation cold plate inside the cabinet is connected to the inlet of the steam return pipeline (8) through a steam phase quick connector (801), the outlet of the steam return pipeline (8) is connected to the condensation inlet pipeline (404) in the condensation heat exchange module (4), and the condensation outlet pipeline (403) in the condensation heat exchange module (4) is connected to the inlet of the liquid storage device (6), thereby forming a circulation loop of the entire device.

2. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The rear door (1) is installed on the back of the cabinet, and the two-phase heat exchange device is isolated from the heating device inside the cabinet by the middle cover plate (202) and the upper cover plate (203), and only the liquid phase quick connector (701) and the vapor phase quick connector (801) are exposed from the middle cover plate (202) through the preset through holes and are connected to the heat dissipation cold plate inside the cabinet.

3. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The lower limit value of the valve position of the regulating valve (702) is 0 scale, corresponding to the fully closed state, and the upper limit value of the valve position is 100 scale, corresponding to the fully open state, and the positioning accuracy is 1 scale.

4. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The dryness detector (802) feeds back the reflux steam dryness signal to the control module (9), and the control module (9) controls the opening of the regulating valve (702) according to the signal. When the reflux steam dryness is less than 0.3, the valve position is roughly adjusted to 30. If the dryness is still less than 0.3 after running for 30 seconds, the valve position is reduced at a rate of 1 scale per second until the dryness is greater than 0.

3. When the dryness of the reflux steam is greater than 0.7, the valve position is roughly adjusted to 70. If the degree is still greater than 0.7 after running for 30 seconds, the valve position increases at a rate of 1 scale per second until the dryness is less than 0.

7. The flow rate is adjusted by the valve opening to adapt to the heat dissipation of devices with different power densities.

5. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The lower cover plate (201) and the rear door (1) are sealed via a sealing strip.

6. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The upper cover plate (203) is partially hollowed out.

7. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The magnetic pump (501) is installed at the liquid phase pipeline (5) at the outlet of the liquid storage container (6).

8. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The safety valve (401) and the filling valve (402) are installed at the condensation outlet pipeline (403) or the condensation inlet pipeline (404).

9. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The fluid inside the coolant outlet pipeline (405) and the coolant inlet pipeline (406) is deionized water or aviation coolant, and the cooling medium provided to the cabinet by the liquid phase quick connector (701) is Freon.

10. The dry-wet separation pump-driven two-phase heat exchange device for cabinet according to claim 1, characterized in that: The inner diameter of the liquid phase pipeline ranges from 6 to 12 mm.

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