A CDU based on a phase change heat transfer device
Patent Information
- Application Number
- CN202522267955.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-27
AI Technical Summary
1、 本实用新型通过在液体缓存部的侧面分别设置进液管和分液管，并通过控制电磁阀控制分液管的通断实现冷却液流向分配，同时在液体缓存部的内部设置辅助防护部，并通过辅助防护部减少冷却液的逆流以及通过辅助散热机构加速液体缓存部内部缓存的冷却液降温以减少液体缓存部内部压力，达到了避免冷却液逆流及通过减少压力提升控制电磁阀使用寿命的效果。
Smart Images
Figure CN224787810U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coolant distributor technology, and in particular to a CDU based on a phase change heat transfer device. Background Technology
[0002] CDU, or Coolant Distribution Unit, is an important component of liquid cooling systems. It is used to distribute circulating coolant to appropriate locations to improve heat dissipation.
[0003] Existing liquid cooling devices mainly rely on the circulation of liquid to absorb and carry heat, thereby achieving efficient heat dissipation. All of their pipes are interconnected. When the coolant distribution unit stops working, the liquid in the pipes at the heat dissipation end may flow back under the action of liquid pressure, causing high temperature to be conducted to the coolant storage device. Even if the solenoid valve used to control the coolant backflow closes in time, the pressure of the liquid over a long period of time can easily cause the solenoid valve's sealing performance to deteriorate.
[0004] To address this issue, this application proposes a CDU based on a phase change heat transfer device to reduce coolant backflow and reduce the problem of solenoid valve damage due to liquid pressure. Utility Model Content
[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a CDU based on a phase change heat transfer device to solve the problem of coolant backflow mentioned in the prior art.
[0006] To achieve the above and other related objectives, this utility model provides a CDU based on a phase change heat transfer device, including a coolant distribution mechanism for distributing coolant flow. The coolant distribution mechanism is provided with auxiliary heat dissipation mechanisms on both the upper and lower surfaces to improve the heat dissipation performance of the coolant distribution mechanism. The coolant distribution mechanism includes a liquid buffer section, an inlet pipe on one side of the liquid buffer section, and multiple distribution pipes on the other side of the liquid buffer section. All distribution pipes are equipped with control solenoid valves. The liquid buffer section is equipped with an auxiliary protection section that communicates with the inlet pipe. The auxiliary protection section is used to reduce coolant backflow.
[0007] Preferably, the auxiliary protection unit includes a secondary buffer tube, which is connected to the liquid inlet tube; The secondary buffer tube is equipped with an isolation plate inside. The isolation plate is conical and divides the interior of the secondary buffer tube into buffer chambers. The outer surface of the isolation plate is provided with several liquid passage holes that penetrate the isolation plate. The isolation plate is equipped with a retractable check valve at its axis. An elastic support is provided between the check valve and the interior of the secondary buffer tube to support the check valve. The check valve controls the opening and closing of the liquid passage through its extension and retraction.
[0008] Preferably, the outer surface of the inlet pipe is provided with a threaded groove, and the inlet pipe is fixed to the wall of the liquid buffer section by cooperating with the nut through the threaded groove.
[0009] Preferably, the anti-reverse component includes a drive plate, the drive plate has a traction rod at its axis, and the end of the traction rod away from the drive plate has a flow-blocking shroud. The drive plate can abut against the opening of the liquid inlet pipe; The elastic support is sleeved on the outer surface of the traction rod and is located between the drive plate and the isolation plate; The flow barrier is horn-shaped, and its outer surface can completely fit against the inner wall of the isolation plate.
[0010] Preferably, the outer surface of the drive plate is provided with a rubber pad, and the diameter of the rubber pad is larger than the inner diameter of the liquid inlet pipe.
[0011] Preferably, the contact surfaces of the liquid buffer and the auxiliary heat dissipation mechanism are provided with auxiliary heat dissipation areas, which are serpentine grooves.
[0012] Preferably, the auxiliary heat dissipation mechanism includes a phase change heat conduction block, the projected area of which is the same as the projected area of the liquid buffer section from a top-down perspective, and the phase change heat conduction block is attached to the outer surface of the liquid buffer section.
[0013] Preferably, the side of the phase change heat-conducting block facing the liquid buffer section is provided with a heat-absorbing groove, and the auxiliary heat dissipation area extends into the interior of the heat-absorbing groove and is completely in contact with the heat-absorbing groove.
[0014] Preferably, the side of the phase change heat-conducting block away from the liquid buffer section is provided with several heat dissipation fins.
[0015] As described above, the CDU based on a phase change heat transfer device of this invention has the following beneficial effects: 1. This utility model provides an inlet pipe and a distributor pipe on the side of the liquid buffer section, and controls the flow direction of the coolant by controlling the opening and closing of the distributor pipe through a control solenoid valve. At the same time, an auxiliary protection section is provided inside the liquid buffer section to reduce the backflow of coolant and to accelerate the cooling of the coolant inside the liquid buffer section through an auxiliary heat dissipation mechanism, thereby reducing the internal pressure of the liquid buffer section. This achieves the effects of preventing coolant backflow and increasing the service life of the control solenoid valve by reducing pressure.
[0016] 2. This utility model isolates a buffer chamber within the secondary buffer tube by setting an isolation plate inside the secondary buffer tube, and opens a liquid passage hole on the isolation plate for coolant to flow through. At the same time, a check valve is set at the axis of the isolation plate and supported by an elastic support. The flow of the liquid passage hole is controlled by the displacement of the check valve. When the liquid inlet pipe is open or closed, the impact force of water hammer effect on the control solenoid valve is avoided by the buffer of the coolant temporarily stored in the buffer chamber and the obstruction of the check valve, thus achieving the effect of further protecting the equipment.
[0017] 3. This utility model provides an auxiliary heat dissipation area on the surface of the liquid buffer section and provides heat absorption grooves and heat dissipation fins on the surface of the phase change heat conduction block. The combination of heat absorption grooves and auxiliary heat dissipation area increases the contact area between the liquid buffer section and the phase change heat conduction block, and the heat dissipation fins increase the heat dissipation speed of the phase change heat conduction block, thereby accelerating the cooling speed of the coolant inside the liquid buffer section and further improving the pressure reduction effect inside the liquid buffer section.
[0018] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description
[0019] Figure 1 The diagram shown is a structural schematic of this utility model.
[0020] Figure 2 The diagram shown is an exploded view of this utility model.
[0021] Figure 3 The image shown is a side view of the structure of the coolant distribution mechanism of this utility model.
[0022] Figure 4 The diagram shown is a cross-sectional view of the coolant distribution mechanism of this utility model.
[0023] Figure 5 The diagram shown is a cross-sectional view of the auxiliary protective part of this utility model.
[0024] Figure 6 The diagram shown is a structural schematic of the anti-reverse component of this utility model.
[0025] Component designation explanation: 1. Coolant distribution mechanism; 11. Liquid buffer section; 12. Inlet pipe; 121. Threaded groove; 13. Divider pipe; 14. Control solenoid valve; 15. Auxiliary heat dissipation area; 16. Auxiliary protection section; 161. Secondary buffer pipe; 162. Isolation plate; 163. Buffer chamber; 164. Liquid passage hole; 165. Check valve; 1651. Drive plate; 1652. Traction rod; 1653. Flow deflector; 1654. Rubber pad; 166. Elastic support component; 2. Auxiliary heat dissipation mechanism; 21. Phase change heat conduction block; 22. Heat absorption groove; 23. Heat dissipation fin plate. Detailed Implementation
[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0027] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0028] like Figure 1 , Figure 2 and Figure 4 As shown, this utility model provides a CDU based on a phase change heat transfer device, including a coolant distribution mechanism 1. The coolant distribution mechanism 1 is used to distribute the coolant flow direction. The upper and lower surfaces of the coolant distribution mechanism 1 are provided with auxiliary heat dissipation mechanisms 2 to improve the heat dissipation performance of the coolant distribution mechanism 1, so as to quickly reduce the temperature of the coolant in the coolant distribution mechanism 1, thereby reducing the pressure in the coolant distribution mechanism 1. Specifically, the coolant distribution mechanism 1 includes a liquid buffer section 11, which is a box with an internal cavity. One side of the liquid buffer section 11 is provided with an inlet pipe 12, and the other side of the liquid buffer section 11 is provided with multiple distribution pipes 13. All distribution pipes 13 are provided with control solenoid valves 14. The control solenoid valves 14 are connected to external control and regulation equipment. External coolant is pumped into the liquid buffer section 11 through the connection of the pump and the inlet pipe 12. Then, the control solenoid valves 14 control the opening and closing of the distribution pipes 13 and the flow rate to achieve the distribution of coolant. The liquid buffer section 11 is provided with an auxiliary protection section 16 that communicates with the liquid inlet pipe 12. The auxiliary protection section 16 is used to reduce coolant backflow, so as to prevent the high-temperature coolant from flowing back into the coolant storage device and to temporarily store the high-temperature coolant in the liquid buffer section 11.
[0029] like Figure 5As shown, in some embodiments, the auxiliary protection part 16 of this utility model includes a secondary buffer tube 161, which is connected to the liquid inlet pipe 12. The coolant delivered by the pump enters the interior of the secondary buffer tube 161 after passing through the liquid inlet pipe 12. The secondary buffer tube 161 is equipped with an isolation plate 162 inside. The isolation plate 162 is conical and divides the interior of the secondary buffer tube 161 into a buffer chamber 163. The outer surface of the isolation plate 162 is provided with several liquid passage holes 164 that penetrate the isolation plate 162. The coolant entering the secondary buffer tube 161 first fills the buffer chamber 163 or pushes the coolant reserved in the buffer chamber 163 through the liquid passage holes 164 to achieve the effect of eliminating water hammer effect. A retractable check valve 165 is provided on the axis of the isolation plate 162. An elastic support 166 is provided between the check valve 165 and the interior of the secondary buffer tube 161 to support the check valve 165. The check valve 165 controls the opening and closing of the liquid passage 164 by telescoping. In use, when coolant enters the interior of the secondary buffer tube 161 through the inlet pipe 12, the liquid pressure will push the check valve 165 away from the contact with the liquid passage 164, so that the coolant can normally enter the liquid buffer section 11 through the liquid passage 164. When the input of coolant to the inlet pipe 12 is stopped, the check valve 165 will be returned to its initial position by the hydraulic force inside the liquid buffer section 11 and the elastic drive of the elastic support 166, thereby sealing the liquid passage 164 through the check valve 165, thereby reducing the backflow of coolant, and reducing the pressure inside the liquid buffer section 11 by cooling the coolant inside the liquid buffer section 11, so as to protect the control solenoid valve 14.
[0030] like Figure 5 As shown, in some embodiments, the outer surface of the liquid inlet pipe 12 of this utility model is provided with a threaded groove 121. The liquid inlet pipe 12 is fixed to the wall of the liquid buffer part 11 by cooperating with the nut through the threaded groove 121, so that the liquid inlet pipe 12 can be removed from the liquid buffer part 11. This allows the auxiliary protective part 16 installed at the end of the liquid inlet pipe 12 to be removed along with the liquid inlet pipe 12, which is convenient for subsequent maintenance and upkeep.
[0031] like Figure 6 As shown, in some embodiments, the anti-reverse component 165 of this utility model includes a drive plate 1651, a traction rod 1652 is provided on the axis of the drive plate 1651, and a flow deflector 1653 is provided at the end of the traction rod 1652 away from the drive plate 1651. The drive plate 1651 can abut against the opening of the inlet pipe 12. When coolant is introduced into the inlet pipe 12, the liquid pressure will push the drive plate 1651, thereby causing the flow shield 1653 to move away from the seal of the liquid passage hole 164. When the drive plate 1651 loses the thrust of the coolant, the drive plate 1651 will move back under the elastic force of the elastic support member 166, thereby sealing the liquid passage hole 164 through the flow shield 1653 and sealing the inlet pipe 12. The elastic support 166 is sleeved on the outer surface of the traction rod 1652 and is located between the drive plate 1651 and the isolation plate 162. It is used to apply an elastic support force to the drive plate 1651 when the drive plate 1651 is not under force, so that the flow shield 1653 can fit tightly against the inner wall of the isolation plate 162 and improve the stability of the seal. The baffle 1653 is horn-shaped, and its outer surface can completely fit the inner wall of the baffle plate 162 to improve the stability of the seal of the baffle 1653 on the liquid passage hole 164. When the coolant passes through the gap between the baffle 1653 and the baffle plate 162, the inclined arc surface can reduce the impact force of the coolant on the baffle 1653. When the coolant flows back, the concave part of the baffle 1653 can better push the baffle 1653 back.
[0032] like Figure 6 As shown, in some embodiments, the outer surface of the drive plate 1651 of this utility model is provided with a rubber pad 1654. The diameter of the rubber pad 1654 is larger than the inner diameter of the liquid inlet pipe 12. The rubber pad 1654 can better improve the sealing performance of the drive plate 1651.
[0033] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the contact surfaces of the liquid buffer section 11 and the auxiliary heat dissipation mechanism 2 of this utility model are provided with auxiliary heat dissipation areas 15. The auxiliary heat dissipation areas 15 are serpentine grooves, which are used to increase the heat dissipation area inside and on the surface of the liquid buffer section 11 and improve the heat dissipation efficiency of the coolant inside the liquid buffer section 11.
[0034] like Figure 2As shown, in some embodiments, the auxiliary heat dissipation mechanism 2 of this utility model includes a phase change heat conduction block 21. The phase change heat conduction block 21 is a combination of phase change material (PCM). Its core is to utilize the latent heat absorption characteristics of the phase change material in the solid-liquid phase change process to significantly improve heat dissipation efficiency and optimize energy consumption. For example, when a phase change material (such as paraffin or metal alloy) absorbs heat, it undergoes a phase change and can absorb a large amount of latent heat, which can be used in conjunction with a liquid cooling system to achieve rapid heat transfer. The projected area of the phase change heat conduction block 21 is the same as the projected area of the liquid buffer section 11 from a top-down perspective. The phase change heat conduction block 21 is attached to the outer surface of the liquid buffer section 11. The phase change heat conduction block 21 absorbs heat from the liquid buffer section 11 to further improve the heat dissipation efficiency of the liquid buffer section 11, so that the coolant in the liquid buffer section 11 is rapidly cooled to reduce the pressure in the liquid buffer section 11.
[0035] like Figure 2 As shown, in some embodiments, the phase change heat conduction block 21 of this utility model has a heat absorption groove 22 on the side facing the liquid buffer section 11, and the auxiliary heat dissipation area 15 extends into the interior of the heat absorption groove 22 and is completely in contact with the heat absorption groove 22, which is used to increase the contact between the phase change heat conduction block 21 and the outer surface of the liquid buffer section 11, thereby further improving the heat absorption efficiency of the phase change heat conduction block 21 on the liquid buffer section 11.
[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the phase change heat conduction block 21 of this utility model is provided with a plurality of heat dissipation fins 23 on the side away from the liquid buffer section 11. The heat dissipation fins 23 are used to increase the heat dissipation area of the phase change heat conduction block 21 itself, so as to improve the heat dissipation efficiency of the phase change heat conduction block 21 itself.
[0037] In summary, the CDU based on a phase change heat transfer device of this invention distributes coolant flow by providing an inlet pipe 12 and a distribution pipe 13 on the side of the liquid buffer section 11, and controlling the opening and closing of the distribution pipe 13 by controlling the solenoid valve 14. At the same time, an auxiliary protection section 16 is provided inside the liquid buffer section 11 to reduce coolant backflow and accelerate the cooling of the coolant buffered inside the liquid buffer section 11 by the auxiliary heat dissipation mechanism 2 to reduce the internal pressure of the liquid buffer section 11. This achieves the effects of avoiding coolant backflow and increasing the service life of the control solenoid valve 14 by reducing pressure.
[0038] This invention isolates a buffer chamber 163 within the secondary buffer tube 161 by setting an isolation plate 162 inside the secondary buffer tube 161. A liquid passage hole 164 is opened on the isolation plate 162 for coolant to flow through. At the same time, a check valve 165 is set at the axis of the isolation plate 162 and supported by an elastic support 166. The flow of the liquid passage hole 164 is controlled by the displacement of the check valve 165. When the inlet pipe 12 is open or closed, the impact force of water hammer effect on the control solenoid valve 14 is avoided by the buffer of the coolant temporarily stored in the buffer chamber 163 and the obstruction of the check valve 165, thus achieving the effect of further protecting the equipment.
[0039] This invention provides an auxiliary heat dissipation area 15 on the surface of the liquid buffer section 11, and provides a heat absorption groove 22 and a heat dissipation fin plate 23 on the surface of the phase change heat conduction block 21. The heat absorption groove 22 and the auxiliary heat dissipation area 15 increase the contact area between the liquid buffer section 11 and the phase change heat conduction block 21, and the heat dissipation fin plate 23 increases the heat dissipation speed of the phase change heat conduction block 21, thereby accelerating the cooling speed of the coolant inside the liquid buffer section 11 and further improving the pressure reduction effect inside the liquid buffer section 11.
[0040] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A CDU based on a phase change heat transfer device, characterized in that, It includes a coolant distribution mechanism (1), which is used to distribute the coolant flow direction. The upper and lower surfaces of the coolant distribution mechanism (1) are provided with auxiliary heat dissipation mechanisms (2) to improve the heat dissipation performance of the coolant distribution mechanism (1). The coolant distribution mechanism (1) includes a liquid buffer section (11), with an inlet pipe (12) on one side of the liquid buffer section (11) and multiple distribution pipes (13) on the other side of the liquid buffer section (11). All distribution pipes (13) are equipped with control solenoid valves (14). The liquid buffer section (11) is provided with an auxiliary protection section (16) that communicates with the liquid inlet pipe (12). The auxiliary protection section (16) is used to reduce coolant backflow.
2. The CDU based on a phase change heat transfer device according to claim 1, characterized in that: The auxiliary protection unit (16) includes a secondary buffer tube (161), which is connected to the liquid inlet tube (12); The secondary buffer tube (161) is provided with an isolation plate (162) inside. The isolation plate (162) is conical and the isolation plate (162) divides the interior of the secondary buffer tube (161) into a buffer chamber (163). The outer surface of the isolation plate (162) is provided with a plurality of liquid passage holes (164) that penetrate the isolation plate (162). The isolation plate (162) has a retractable anti-reverse component (165) at its axis. An elastic support (166) is provided between the anti-reverse component (165) and the interior of the secondary buffer tube (161) to support the anti-reverse component (165). The anti-reverse component (165) controls the opening and closing of the liquid passage (164) by telescoping.
3. The CDU based on a phase change heat transfer device according to claim 2, characterized in that: The outer surface of the liquid inlet pipe (12) is provided with a threaded groove (121), and the liquid inlet pipe (12) is fixed to the wall of the liquid buffer section (11) by the threaded groove (121) and the nut.
4. The CDU based on a phase change heat transfer device according to claim 2, characterized in that: The anti-reverse component (165) includes a drive plate (1651), a traction rod (1652) is provided on the axis of the drive plate (1651), and a flow deflector (1653) is provided at the end of the traction rod (1652) away from the drive plate (1651). The drive plate (1651) can abut against the opening of the liquid inlet pipe (12); The elastic support (166) is sleeved on the outer surface of the traction rod (1652) and is located between the drive plate (1651) and the isolation plate (162); The flow deflector (1653) is horn-shaped, and the outer surface of the flow deflector (1653) can be completely fitted with the inner wall of the isolation plate (162).
5. The CDU based on a phase change heat transfer device according to claim 4, characterized in that: The outer surface of the drive plate (1651) is provided with a rubber pad (1654), the diameter of which is larger than the inner diameter of the liquid inlet pipe (12).
6. The CDU based on a phase change heat transfer device according to any one of claims 1-5, characterized in that: The contact surfaces of the liquid buffer section (11) and the auxiliary heat dissipation mechanism (2) are both provided with auxiliary heat dissipation areas (15), which are serpentine grooves.
7. The CDU based on a phase change heat transfer device according to claim 6, characterized in that: The auxiliary heat dissipation mechanism (2) includes a phase change heat conduction block (21), the projected area of which is the same as the projected area of the liquid buffer section (11) from a top view, and the phase change heat conduction block (21) is attached to the outer surface of the liquid buffer section (11).
8. The CDU based on a phase change heat transfer device according to claim 7, characterized in that: The phase change heat conduction block (21) has a heat absorption groove (22) on the side facing the liquid buffer section (11), and the auxiliary heat dissipation area (15) extends into the interior of the heat absorption groove (22) and is completely in contact with the heat absorption groove (22).
9. The CDU based on a phase change heat transfer device according to claim 8, characterized in that: The phase change heat conduction block (21) has several heat dissipation fins (23) on the side away from the liquid buffer section (11).