High-performance computer two-phase cooling isolation heat exchange cabinet

Abstract

The invention relates to the technical field of non-contact heat exchange of computer cabinets, in particular to a high-performance computer two-phase cooling isolation heat exchange cabinet which comprises a cabinet unit, a corrugated bare wall, a medium switching system and a reciprocating driving mechanism. The medium switching system comprises a lower-layer driving cavity fixed to the bottom of the corrugated plate and an upper-layer follow-up cavity fixed to the top of the corrugated plate, the two ends of the straight-through heat conduction pipe are communicated with the two cavities respectively, a column block and a free supporting rod are arranged in a pipe opening in a sleeved mode, and the reciprocating driving mechanism drives the column block to move up and down in the straight-through heat conduction pipe. And a solid-liquid two-phase medium is driven to flow back and forth between the inner side groove and the outer side groove, so that heat exchange is realized. The device is combined with phase change material latent heat circulation and straight air duct design, full-closed, efficient and low-cost heat exchange is achieved through a low-power-consumption driving system, and the device has high reliability, environment friendliness and expandability.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-contact heat exchange for computer cabinets, and particularly relates to a high-performance computer two-phase cooling isolated heat exchange cabinet. Background Art

[0002] A high-performance computer cabinet is a special cabinet used to house and operate high-performance computer equipment, usually equipped with servers, storage devices, network devices, etc. The existing cooling methods for computer cabinets mainly include air cooling and liquid cooling. Air cooling dissipates heat into the surrounding air through fans and heat sinks, while liquid cooling uses a coolant to circulate through pipes to carry away heat. The cooling efficiency of the air cooling method is limited and it is difficult to meet the high heat dissipation requirements of high-performance computers. Since the cabinet is usually designed in an open manner, heat is easily leaked, affecting the cooling effect. Although the liquid cooling method has higher efficiency, it requires complex pipes and pumps and there is a risk of leakage. The liquid cooling method requires the configuration of an independent refrigeration system (such as a compressor, condenser, etc.), increasing the initial investment cost of the equipment. The refrigeration system and circulation fans consume a large amount of electric energy, resulting in high long-term operating costs.

[0003] Phase change materials absorb or release latent heat through solid-liquid phase changes and have been widely used in the heat dissipation field. For example: Server chip heat dissipation: Tagino's Fill-PCM800 fills the gap between the chip and the radiator through phase change, significantly reducing the thermal resistance (thermal conductivity up to 8 W / mK, thermal resistance as low as 0.007 °C·in² / W). Data center applications: Honeywell's PTM series of phase change materials are used for high-power chip heat dissipation, supporting dynamic temperature regulation and interface gap filling. Laptop heat dissipation: Phase change materials can delay the temperature rise, reduce the dependence on fans, and reduce noise. Honeywell PCM's article "How to Lead the New Revolution in New Energy and AI Heat Dissipation with Phase Change Materials" mentions that Honeywell's PTM7900 phase change material has a thermal conductivity as high as 8 W / mK and a thermal resistance as low as 0.045 °C·cm² / W, which can quickly conduct the heat generated by the chip and effectively relieve local hot spots. Other existing technologies: A vapor chamber (VC) radiator is a passive thermal management system that operates based on the principles of phase change and heat conduction and is commonly used in high heat flux applications such as high-performance computing and consumer electronic devices. The VC radiator provides a more uniform temperature distribution through efficient phase change heat transfer. However, the above existing technologies mostly focus on static phase changes (such as filling in the radiator) and do not mention a similar dynamic cycle design. In addition, the traditional curved duct design is not suitable for solid-liquid two-phase media, and the solid medium is easily stuck, affecting the normal operation of the equipment.

[0004] With the development of high-performance computers, the requirements for cooling systems are getting higher and higher. Data centers can usually reach the kilowatt level. The improvement of performance urgently requires more reliable heat dissipation solutions and materials. The existing cooling methods have many shortcomings in cooling efficiency, equipment cost, operating energy consumption, structural design and environmental adaptability. In order to meet the efficient cooling needs of high-performance computers, reduce equipment and operating costs, and improve the stability and adaptability of the system, an innovative cooling solution is urgently needed. Summary of the invention

[0005] In view of the defects and problems existing in the prior art, the present invention proposes a design of a fully enclosed high-performance computer two-phase cooling isolation heat exchange cabinet, which utilizes solid-liquid phase change medium to achieve efficient heat exchange, does not require independent refrigeration equipment, and significantly reduces equipment and operating costs. At the same time, it optimizes heat transfer through internal and external circulation systems to achieve room temperature cooling effects.

[0006] The solution of the present invention to solve the technical problem is: adopt a high-performance computer two-phase cooling isolation heat exchange cabinet, including a cabinet unit and a corrugated bare wall, and also including a medium switching system and a reciprocating drive mechanism. The corrugated bare wall includes a corrugated plate and a straight-through heat pipe. The inner side of the corrugated plate has an inner groove, and the outer side has an outer groove. A plurality of parallel straight-through heat pipes are fixed vertically through the side wall center of each side groove. The straight-through heat pipe is a straight line. Each vertical straight-through heat pipe simultaneously penetrates a plurality of transverse inner grooves and a plurality of transverse outer grooves. A solid-liquid two-phase medium is filled in the straight-through heat pipe. A medium switching system for driving the solid-liquid two-phase medium in the straight-through heat pipe to reciprocate in both directions is fixed at the bottom and top of the corrugated plate. The medium switching system includes a lower active cavity and an upper follower cavity. The lower active cavity is fixed to the bottom of the corrugated plate, and the upper follower cavity is fixed to the top of the corrugated plate. The bottom and top of the straight heat-conducting pipe are connected to the lower active cavity and the upper follower cavity respectively. Column blocks are respectively installed in the upper and lower end pipe openings of the straight heat-conducting pipe. The outer end of each column block is connected to a free support rod, and a limit baffle is installed on the free support rod. The limit baffles are respectively located in the lower active cavity and the upper follower cavity; a breathing nozzle is arranged on the top or side of the upper follower cavity; the reciprocating drive mechanism is used to alternately provide positive and negative pressures to the lower active cavity to increase or decrease the gas or liquid in the lower active cavity, thereby driving each column block to move upward or downward in the corresponding straight heat-conducting pipe, and then driving the solid-liquid two-phase medium in the straight heat-conducting pipe to reciprocate between adjacent inner grooves and outer grooves.

[0007] Preferably, the side wall of the cabinet unit includes at least a corrugated bare wall, or an outer side plate is fixed on the outer side of the corrugated bare wall, or an inner side plate is fixed on the inner side of the corrugated bare wall.

[0008] Preferably, the reciprocating drive mechanism includes a base and a micro motor. The base is fixed to the bottom of the lower active chamber. A piston cylinder is respectively and fixedly installed on the base. A piston is sleeved in the piston cylinder. A breathing tube is connected to the distal end of the piston cylinder. The breathing tube communicates with the inner cavity of the lower active chamber. The lower active chamber is filled with fluid. The micro motor drives the piston to reciprocate through a linear drive mechanism.

[0009] Preferably, the linear drive mechanism includes a sealing cover respectively and fixedly installed on the base. Axle seats are arranged at both ends inside the sealing cover and a pair of parallel turntables are installed. Rotating shafts are arranged at the centers of the outer sides of the two turntables. Each rotating shaft is respectively installed in the corresponding axle seat. An eccentric shaft is connected between the two turntables; A T-shaped rod is fixedly installed at the center of the proximal end of the piston. The T-shaped rod includes a cross bar and a vertical bar. A strip hole is arranged on the vertical bar. The strip hole is sleeved outside the eccentric shaft. The micro motor is fixedly installed at the proximal end of the base. The rotating shaft of the micro motor is in transmission connection with the rotating shaft of the turntable.

[0010] Preferably, an external circulation system is further included. The external circulation system includes an outer side plate, a front sealing plate, an external reflux chamber, a rear wall chamber and an external exhaust fan. The outer side plate is fixed to the outer side wall of the corrugated plate. A plurality of outer groove diversion channels are formed between the outer side plate and the outer groove. A front sealing plate is fixed to the front end of the corrugated plate and a plurality of external air inlets are opened on the front sealing plate. Each external air inlet corresponds to the head end of the corresponding outer groove diversion channel. An external reflux chamber is fixed to the rear end of the corrugated plate. The rear end of each outer groove diversion channel communicates with the inner cavity of the external reflux chamber. A rear wall chamber is fixed to the outer side of the rear wall of the cabinet body of the cabinet unit. The external reflux chamber communicates with the inner cavity of the rear wall chamber. An opening is made at the rear end of the rear wall chamber and the external exhaust fan is installed.

[0011] Preferably, an internal circulation system is further included. The internal circulation system includes an inner side plate, an internal reflux chamber, a top wall chamber and an internal exhaust fan. The inner side plate is fixed to the inner side wall of the corrugated plate. A plurality of inner groove diversion channels are formed between the inner side plate and the inner groove. A series of internal air inlets are respectively arranged on the surface of the inner side plate. The inner groove diversion channels communicate with the inner cavity of the cabinet body through the internal air inlets. An internal reflux chamber is fixed at a position closer to the rear of the inner side plate. The rear end of each inner groove diversion channel communicates with the inner cavity of the internal reflux chamber. A main outlet pipe is installed at the top of the internal reflux chamber. A top wall chamber is arranged at the top of the inner cavity of the cabinet body. An internal exhaust fan is installed at the center of the top wall chamber. The main outlet pipe communicates with the inner cavity of the top wall chamber.

[0012] Preferably, the free strut adopts a screw-type free strut. Double nuts are installed on the thread at the end of the screw-type free strut. The limit stop is located between the double nuts and fixed. The double nuts are adjusted to change the position of the limit stop.

[0013] Preferably, a rib plate is arranged transversely along the center of the inner groove and / or the outer groove of the corrugated plate.

[0014] Advantages of the present invention: 1. No need for an independent refrigeration device, with strong room temperature compatibility. Heat is absorbed / released through the latent heat of phase change of a solid-liquid two-phase medium (such as paraffin, mirabilite), and cooling is directly achieved using the ambient temperature (25–35°C), without traditional refrigeration devices such as compressors and refrigerants, thus reducing equipment complexity and initial investment costs, and is especially suitable for computer rooms or laboratory environments with existing air-conditioning temperature control.

[0015] 2. Fully enclosed heat exchange, isolating external pollution. The internal and external circulations of the cabinet are completely isolated, and the internal circulation system operates in a closed loop through a dry airflow, avoiding the intrusion of dust and moisture into the cabinet.

[0016] 3. High energy efficiency ratio and low operating energy consumption. The phase change material (PCM) has a high latent heat value (such as paraffin-based PCM reaching 200–300 J / g), and the heat absorption / release per unit volume is far higher than that of traditional air cooling. Only a micro motor is required to drive the medium switching and a low-power fan to maintain the airflow, and the energy consumption is significantly lower than that of traditional liquid cooling or compression refrigeration systems. The long-term operating cost is reduced, energy conservation and environmental protection are achieved, meeting the requirements of green data centers.

[0017] 4. Anti-jamming design, with high system reliability. The direct-through heat conduction pipe adopts a linear structure, avoiding the risk of blockage of the solid medium in the bent pipe. The column block cooperates with the limit stop to ensure the stable reciprocating flow of the phase change medium in the direct-through heat conduction pipe, improving the stability and service life of the system during long-term operation and reducing maintenance requirements.

[0018] 5. Maximize the dynamic heat exchange efficiency. Through the medium switching system and the reciprocating drive mechanism, the liquid medium after heat absorption is periodically transferred to the external circulation for cooling, while the solid medium is transferred to the internal circulation for heat absorption. The external circulation directly cools the phase change material using room temperature air, and the internal circulation efficiently cools the environment inside the cabinet through a dry airflow. Description of the Drawings

[0019] Figure 1 is a schematic three-dimensional structure diagram of the cabinet of the present invention; Figure 2 is Figure 1 a schematic structure diagram of the cabinet after removing the outer side plate; Figure 3 is Figure 2 a side view of Figure 4 is Figure 3 a schematic cross-sectional structure diagram of A-A in Figure 5 is a schematic composite structure diagram of a corrugated bare wall; Figure 6 is Figure 5 a schematic three-dimensional structure diagram of the other side of Figure 7 is a schematic structure diagram of two corrugated plates; Figure 8 is Figure 7 Schematic diagram of the enlarged structure of part D in Figure 9 is Figure 7 Schematic diagram of the enlarged structure of part E in Figure 10 Schematic diagram of the partial structure of the corrugated bare wall; Figure 11 Schematic diagram of the structure of a reciprocating drive mechanism.

[0020] Reference numerals in the figure: 1 - floor-standing unit; 2 - corrugated bare wall; 3 - external circulation system; 4 - internal circulation system; 5 - medium switching system; 6 - reciprocating drive mechanism; 11 - cabinet main body; 12 - front door; 13 - side wall; 14 - rear wall; 15 - thermal insulation layer; 16 - mesh cover; 21 - corrugated plate; 22 - inner groove; 23 - outer groove; 24 - straight heat conduction pipe; 25 - rib plate; 31 - outer plate; 32 - front sealing plate; 33 - external air inlet hole; 34 - external return cavity; 35 - external wall air inlet hole; 36 - outer groove diversion channel; 361 - closed channel; 37 - rear wall cavity; 38 - external exhaust fan; 39 - external cavity exhaust hole; 41 - inner plate; 42 - internal air inlet hole; 43 - internal return cavity; 44 - internal cavity exhaust hole; 45 - main outlet pipe; 46 - inner groove diversion channel; 47 - top wall cavity; 48 - internal exhaust fan; 51 - lower active cavity; 52 - upper follower cavity; 53 - column block; 54 - free strut; 55 - limit stop; 56 - breathing nozzle; 61 - base; 62 - piston cylinder; 63 - piston; 64 - breathing pipe; 65 - sealing cover; 66 - micro motor; 67 - turntable; 68 - eccentric shaft; 69 - T-shaped rod. Detailed implementation manners

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Embodiment 1: Traditional console computers usually adopt air cooling or liquid cooling methods. However, the efficiency of air cooling is limited, and liquid cooling requires complex pipelines and pumps, with a high risk of leakage. The solution of the present invention realizes efficient heat exchange through a solid-liquid phase change medium, significantly improving the cooling efficiency. Specifically, this embodiment provides a two-phase cooling isolation heat exchange console computer with high performance, including a console unit 1, a corrugated bare wall 2, an external circulation system 3, an internal circulation system 4, a medium switching system 5, a reciprocating drive mechanism 6, etc. It realizes efficient heat exchange through a solid-liquid phase change medium, adopts a fully enclosed design and low-energy-consuming components, significantly improves the cooling efficiency and system reliability, reduces equipment and operation costs, adapts to different indoor and outdoor temperature differences, and ensures the stable operation of high-performance computers. In the fully enclosed state of the console computer and without the need for independent refrigeration equipment, efficient heat exchange inside and outside the console computer is achieved through solid-liquid phase change, achieving the liquid cooling effect with the energy consumption of air cooling. In traditional bent ducts, the solid medium is prone to jamming, affecting the heat exchange efficiency. This solution adopts a straight-through heat conduction pipe to avoid the problem of medium jamming and ensure the smooth flow of the medium.

[0023] Specifically, as Figure 1 and Figure 2 shown, the console unit 1 includes a console body 11, a front door 12, side walls 13, a rear wall 14, a thermal insulation layer 15, a mesh cover 16, and other switch or indicator light configurations, etc. Side walls 13 are fixedly installed on the left and right sides of the rectangular frame of the console body 11, and a front door 12 (or the front door can be absent) is installed on the front side through a hinge, and a rear wall 14 is fixed on the rear side. Figure 5 It is shown in

[0024] that the rear wall 14 is a two-layer board with a sandwich layer in the middle, and a thermal insulation layer 15 is filled in the sandwich layer. An external air inlet hole 33 is respectively arranged on the front side of each side wall 13, and a mesh cover 16 is sleeved outside the external air inlet hole 33. The inner cavity of the console body 11 is an independent inner cavity, or is horizontally divided into multiple layers. When there is a multi-layer design, through holes communicating up and down are arranged in each horizontal partition layer.

[0024] As Figure 6 and Figure 10 shown, the side wall 13 includes a corrugated bare wall 2, an outer plate 31, and an inner plate 41. Among them, the corrugated bare wall 2 includes a corrugated plate 21, an inner groove 22, an outer groove 23, a straight-through heat conduction pipe 24, and a rib plate 25. The corrugated plate 21 is a wavy plate, and the cross-section of its wave can be in the shape of a rectangle, trapezoid, parallelogram, triangle, or circle, etc., and the bottom of the wave is horizontal. As Figure 10As shown, the inner side of the corrugated plate 21 has an inner groove 22, and the outer side has an outer groove 23. On the side wall of each side groove, multiple parallel straight heat pipes 24 are vertically penetrated and fixed. The straight heat pipes 24 are straight and avoid any bending design, so as to avoid the problem of solid medium getting stuck. Therefore, multiple vertical straight heat pipes 24 simultaneously penetrate multiple horizontal inner grooves 22 and multiple horizontal outer grooves 23. The straight heat pipes 24 are copper tubes or aluminum tubes, and the corrugated plate 21 is an aluminum plate. Figure 7 ① provides a corrugated plate 21 without ribs, and ② provides a corrugated plate 21 with ribs 25. The ribs 25 can not only improve the support strength of the straight heat pipe 24 in the side groove and the strength of the entire side wall, but also increase the heat conduction effect. When producing the corrugated plate 21 containing the straight heat pipe 24, it is preferred to use a casting method, the lower mold and the upper mold used for casting are respectively matched with the bottom and top shapes of the corrugated plate 21, and there is a gap consistent with the thickness of the corrugated plate 21 between the upper and lower molds, and the upper and lower molds are respectively provided with grooves corresponding to the semicircle of the straight heat pipe 24, and multiple straight heat pipes 24 are respectively arranged and set in the corresponding grooves of the lower mold, and then the upper mold is buckled to ensure that the upper and lower molds are sealed around, and only a few pouring ports are retained, and aluminum water is poured from the pouring ports. After the mold is cooled and opened, the corrugated plate 21 blank containing the straight heat pipe 24 can be formed, and the corrugated bare wall 2 is formed after trimming and finishing.

[0025] The straight heat pipe 24 is filled with a solid-liquid two-phase medium (i.e., phase change medium), such as paraffin or Glauber's salt. The latent heat value of paraffin-based PCM can reach 200-300 J / g, which is suitable for absorbing instantaneous high heat. Hydrated salts such as sodium sulfate decahydrate (glauber's salt) have a melting point of about 32°C and can be used for thermal energy storage. There are solid-liquid two-phases during phase change. A medium switching system 5 for driving the reciprocating flow of the solid-liquid two-phase medium in the straight heat pipe 24 is fixed at the bottom and top of the corrugated plate 21.

[0026] like Figures 7 - 9As shown, the medium switching system 5 includes a lower active chamber 51, an upper follower chamber 52, a column block 53, a free strut 54, and a limit stop 55. The lower active chamber 51 is fixed to the bottom of the corrugated plate 21, and the upper follower chamber 52 is fixed to the top of the corrugated plate 21. The bottom and top of each straight heat-conducting tube 24 are respectively communicated with the lower active chamber 51 and the upper follower chamber 52. Column blocks 53 are sleeved inside the upper and lower ends of the straight heat-conducting tube 24. A free strut 54 is connected to the outer end of each column block 53, and a limit stop 55 is installed on each free strut 54 (for example, double nuts are installed on a screw-type strut, and the limit stop is located between the double nuts and fixed, and the height of the limit stop can be adjusted). The limit stops 55 at both ends of the straight heat-conducting tube 24 are respectively located in the lower active chamber 51 and the upper follower chamber 52. The function of the limit stop 55 is to prevent the column block 53 from slipping out of the straight heat-conducting tube 24 and ensure that the phase-change medium located in the straight heat-conducting tube 24 does not leak. A breather nozzle 56 is provided at the top or side of the upper follower chamber 52. The straight heat-conducting tube 24 adopts a straight-line design without any bending or complex structure. This design ensures that even if the medium becomes solid, it will not be stuck or blocked due to the pipe shape. The straight-line heat-conducting tube allows the solid medium to move smoothly along the inner wall of the tube.

[0027] The reciprocating drive mechanism 6 is used to alternately supply positive and negative pressures into the lower active chamber 51 to cause the gas or liquid in the lower active chamber 51 to increase and decrease, thereby driving each column block 53 to move up or down in the corresponding straight heat-conducting tube 24, and further driving the solid-liquid two-phase medium in the straight heat-conducting tube 24 to reciprocate between the adjacent inner grooves 22 and outer grooves 23.

[0028] As Figure 3 and Figure 11As shown, it provides a form of reciprocating drive mechanism 6, which includes a base 61, a piston cylinder 62, a piston 63, a breathing pipe 64, a sealing cover 65, a micro motor 66, a turntable 67, an eccentric shaft 68, and a T-shaped rod 69. The base 61 is fixed to the bottom of the lower active chamber 51. The piston cylinder 62 and the sealing cover 65 are respectively and fixedly installed on the base 61. A piston 63 is sleeved in the piston cylinder 62. A breathing pipe 64 is connected to the distal end of the piston cylinder 62. The breathing pipe 64 communicates with the inner cavity of the lower active chamber 51. The lower active chamber 51 is filled with air or any stable liquid fluid at normal temperature. A pair of parallel turntables 67 are installed in the sealing cover 65 through a shaft seat. The outer ends of the two turntables 67 are provided with rotating shafts, and each rotating shaft is installed in the corresponding shaft seat. An eccentric shaft 68 is connected between the two turntables 67. A T-shaped rod 69 is fixed to the proximal center of the piston 63. The T-shaped rod 69 includes a cross bar and a vertical bar. A strip hole is provided on the vertical bar, and the strip hole is sleeved on the outside of the eccentric shaft 68. A micro motor 66 is fixedly installed at the proximal end of the base 61. The rotating shaft of the micro motor 66 is in transmission connection with the rotating shaft of the turntable 67. For example, a driven bevel gear is installed on the rotating shaft of one of the turntables 67, and a driving bevel gear is installed on the rotating shaft of the micro motor 66. The driving bevel gear meshes with the driven bevel gear, and the speed ratio is 1:4.

[0029] Thus, when the micro motor 66 is controlled by the controller to rotate, it can drive the piston 63 to reciprocate linearly, thereby promoting the increase or decrease of the air or liquid pressure in the lower active chamber 51 and alternating. The increase or decrease of the gas or liquid pressure in the lower active chamber 51 directly acts on the column blocks 53 in all the straight-through heat-conducting tubes 24, enabling the multiple column blocks 53 to move up and down. Consequently, the solid-liquid two-phase medium in each straight-through heat-conducting tube 24 can move up and down. By controlling the stroke of the piston 63, the volume V1 of the gas or liquid compressed each time can be calculated according to the cross-sectional area S1 and the stroke distance d of the piston 63, i.e., V1 = S1×d. At the same time, according to the inner cross-sectional area S2 of each straight-through heat-conducting tube 24 and the height difference h to be lifted, the total lifting volume V2 of the solid-liquid two-phase medium in n straight-through heat-conducting tubes 24 can be calculated, i.e., V2 = S2×h×n. Ensure that V1≈V2, so that the amplitude of the lifting movement controls the height difference h between the inner groove 22 and the outer groove 23. Thus, when the temperature inside the corrugated plate 21 is higher and the temperature outside is lower (the indoor temperature is reduced by means of an air conditioner), the higher temperature inside promotes the solid-liquid two-phase medium to become liquid, and the lower temperature outside promotes the solid-liquid two-phase medium to become solid. The multiple inner grooves 22 correspond to multiple liquid segments, and the multiple outer grooves 23 correspond to multiple solid segments. Under the action of the medium switching system 5 and the reciprocating drive mechanism 6, the solid can be quickly transferred to the position of the inner groove 22, and the liquid can be transferred to the position of the outer groove 23. After the position of the inner groove 22 becomes liquid and the position of the outer groove 23 becomes solid, the lifting relationship is switched again. When the solid-liquid two-phase medium melts into liquid, it absorbs the inner heat and releases heat to the outside when it solidifies. In the above structure, the straight-through heat-conducting tube 24 is always in a straight-through state, and there will be no problem of being stuck by solid substances.

[0030] To further promote the heat exchange efficiency, an external circulation system 3 and an internal circulation system 4 are additionally provided in this embodiment. As Figure 5 and Figure 6As shown in the figure, the outer circulation system 3 includes an outer side plate 31, a front sealing plate 32, an outer air inlet hole 33, an outer reflux cavity 34, an outer wall air inlet hole 35, an outer groove diversion channel 36, a rear wall cavity 37, an outer exhaust fan 38 and an outer cavity exhaust hole 39. The outer side plate 31 is fixed to the outer side wall of the corrugated plate 21, so that a plurality of outer groove diversion channels 36 are formed between the outer side plate 31 and the outer groove 23. The front sealing plate 32 is fixed to the front end of the corrugated plate 21, and a plurality of outer air inlet holes 33 are formed in the front sealing plate 32. Each outer air inlet hole 33 corresponds to the head end of the corresponding outer groove diversion channel 36. The outer reflux cavity 34 is fixed to the rear end of the corrugated plate 21. The rear end of each outer groove diversion channel 36 is communicated with the inner cavity of the outer reflux cavity 34 through the outer wall air inlet hole 35. At the same time, the rear wall cavity 37 is fixed to the rear side of the rear wall 14 of the cabinet main body 11. The inner side wall (or rear side wall) of the outer reflux cavity 34 is communicated with the inner cavity of the rear wall cavity 37 through the outer cavity exhaust hole 39. An outer exhaust fan 38 is installed by opening a hole at the rear end of the rear wall cavity 37. When the outer exhaust fan 38 rotates, it can drive the room temperature air flow to enter the outer groove diversion channel 36 from a plurality of outer air inlet holes 33, and then discharge it through the outer reflux cavity 34 and the rear wall cavity 37, thus constituting the outer circulation. The outer circulation air flow cools the phase change material in the outer groove diversion channel 36 to make it become solid. When the medium switching system 5 and the reciprocating driving mechanism 6 act to make each section of the solid enter the inner groove diversion channel 46, the inner circulation air flow absorbs heat in the inner groove diversion channel 46, so that the phase change material in the inner groove diversion channel 46 becomes liquid. When the medium switching system 5 and the reciprocating driving mechanism 6 act to make each section of the liquid enter the outer groove diversion channel 36, a cycle is formed.

[0031] As Figures 3 - 5As shown in the figure, the internal circulation system 4 includes an inner side plate 41, inner air inlet holes 42, an inner reflux cavity 43, inner cavity exhaust holes 44, a main outlet pipe 45, an inner groove diversion channel 46, a top wall cavity 47, and an inner exhaust fan 48. The inner side plate 41 is fixed to the inner side wall of the corrugated plate 21, so that a plurality of inner groove diversion channels 46 are formed between the inner side plate 41 and the inner groove 22. A series of inner air inlet holes 42 are respectively arranged on the surface of the inner side plate 41. The inner air inlet holes 42 can communicate the inner cavity of the cabinet body 11 with the inner groove diversion channels 46. An inner reflux cavity 43 is fixed at the rear position of the inner side plate 41. The rear end of each inner groove diversion channel 46 communicates with the inner cavity of the inner reflux cavity 43 (desiccant can be filled in the inner reflux cavity 43). A main outlet pipe 45 is installed at the top of the inner reflux cavity 43. At the same time, a top wall cavity 47 is arranged at the top of the inner cavity of the cabinet body 11, and an inner exhaust fan 48 is installed at the center of the top wall cavity 47. The main outlet pipe 45 communicates with the inner cavity of the top wall cavity 47, thus forming an internal circulation. When the inner exhaust fan 48 rotates, the air flow in the inner cavity of the cabinet body 11 can be sucked into each inner groove diversion channel 46. After being cooled by the phase change material in the inner groove diversion channel 46, it flows back through the inner reflux cavity 43, and then through the main outlet pipe 45 and the top wall cavity 47, and the cooled dry air flow is discharged into the inner cavity of the cabinet body 11 again.

[0032] The above solution can be cooled at room temperature without an additional cooling system. The core technical advantages are: (1) fully enclosed without refrigerant: relying on the latent heat absorption / release of the phase change material, without a compressor or refrigerant, reducing the equipment complexity and cost; (2) room temperature compatibility: the external circulation directly uses the ambient temperature air for cooling, adapting to the conventional air-conditioning environment (25–35°C); (3) high energy efficiency ratio: the energy consumption of the micro motor and the low-power fan is much lower than that of the traditional refrigeration system, and the long-term operation cost is significantly optimized; (4) anti-jamming design: the straight-through heat conduction pipe and the column block strut structure ensure the smooth movement of the solid medium, improving the system reliability.

[0033] When the above solution is in use, first check the sealing performance of the cabinet unit 1 (whether the front door 12, side walls 13, and rear wall 14 are closed), ensure that the thermal insulation layer 15 is not damaged, confirm that the mesh cover 16 of the external circulation system 3 is not blocked, the internal air inlet hole 42 of the internal circulation system 4 is unobstructed, verify whether the breathing nozzle 56 of the medium switching system 5 is normally ventilated, and the micro motor 66 of the reciprocating drive mechanism 6 is powered normally; then turn on the micro motor 66, drive the turntable 67 to drive the eccentric shaft 68 to rotate, push the piston 63 to reciprocate in the piston cylinder 62 through the T-shaped rod 69, and alternately apply positive and negative pressures to the lower layer active cavity 51 through the reciprocating movement of the piston 63, driving the column block 53 in the direct conduction heat pipe 24 to move up and down, forcing the solid-liquid two-phase medium to flow periodically between the inner and outer grooves (liquid and solid alternately occupy the inner / outer grooves); then turn on the external exhaust fan 38, and the external room temperature air enters the outer groove diversion channel 36 from the external air inlet hole 33, flows through the surface of the solid phase change material in the outer groove 23, and is discharged through the external return cavity 34 and the rear wall cavity 37; then turn on the internal exhaust fan 48, and the high-temperature air flow in the cabinet enters the inner groove diversion channel 46 from the internal air inlet hole 42, flows through the surface of the liquid phase change material in the inner groove 22, and returns to the cabinet through the internal return cavity 43, the main exhaust pipe 45, and the top wall cavity 47.

[0034] After the solid-liquid phase change material (such as paraffin) absorbs the heat in the cabinet, part of it melts into a liquid state, and the latent heat absorption significantly reduces the air flow temperature, realizing rapid cooling in the cabinet. The internal circulation forms a closed-loop drying air flow (optional desiccant) to prevent condensation in the cabinet and ensure the safety of electronic equipment.

[0035] During the cooling operation, the reciprocating drive mechanism 6 periodically switches the pressure direction, causing the solid-liquid two-phase medium to migrate between the inner and outer grooves, that is, the inner groove 22 → the outer groove 23, and the liquid phase change material transfers the heat to the outside; it solidifies and releases heat in the external circulation air flow, that is, the outer groove 23 → the inner groove 22, and the solid phase change material transfers to the inner side and absorbs heat and melts in the internal circulation air flow.

[0036] The linear design of the direct conduction heat pipe 24 avoids the jamming of the solid medium, ensures the stable flow of the phase change material, and realizes the efficient transfer of heat from the cabinet to the external environment through the solid-liquid phase change cycle, which is equivalent to the liquid cooling effect but only requires the energy consumption of air cooling. Monitor the temperature in the cabinet and the phase change state of each section of the corrugated bare wall 2 through a temperature sensor, dynamically adjust the rotation speed of the micro motor 66, and control the medium switching frequency (increase the switching speed at high temperatures to enhance heat dissipation).

[0037] The air speeds of the internal / external exhaust fans are adjusted according to the heat load to adapt to the heat dissipation requirements under different loads, maintaining the temperature in the cabinet stable near the melting point of the phase change material and maximizing the latent heat utilization efficiency.

[0038] During shutdown and maintenance, sequentially turn off the internal exhaust fan 48, the external exhaust fan 38, and the micro motor 66. Regularly check the medium filling amount in the direct heat conduction pipe 24, clean the dust accumulated on the mesh cover 16 and the internal air intake holes 42, and replace the desiccant in the internal reflux chamber 43.

[0039] Embodiment 2: On the basis of Embodiment 1, the internal circulation system is not adopted, and the inner plate is not fixed to the inner side wall of the corrugated plate 21. Since the direct heat conduction pipe sections are exposed in a series of uniformly distributed inner grooves 22, even without the internal circulation system, the cold can be released into the cabinet by relying on the direct heat conduction pipe sections in the inner grooves 22 on the inner side wall of the corrugated bare wall 2.

[0040] Embodiment 3: On the basis of Embodiment 1 or 2, the external circulation system is not adopted, and the outer plate is not fixed to the outer side wall of the corrugated plate 21. Since the direct heat conduction pipe sections are exposed in a series of uniformly distributed outer grooves 23, even without the external circulation system, the cold can be directly absorbed from the lower indoor temperature by relying on the direct heat conduction pipe sections in the outer grooves 23 on the outer side wall of the corrugated bare wall 2.

[0041] Embodiment 4: On the basis of Embodiment 1, when it is necessary to add vertical and / or horizontal partitions in the inner cavity of the cabinet main body 11, the structural form shown in Figure 6 (2) is adopted, Figure 6 (2) is on the basis of Figure 6 (1). After symmetrically fixing two corrugated plates 21, a closed channel 361 is formed. This closed channel 361 can be used as an outer groove diversion channel. A front sealing plate 32 is fixed at the front end of the corrugated plate 21, and a plurality of outer air intake holes 33 are opened on the front sealing plate 32. Each outer air intake hole 33 corresponds to the head end of the corresponding closed channel 361, and the rest is the same as Embodiment 1.

[0042] Embodiment 5: On the basis of Embodiment 1, the internal circulation system and / or the external circulation system is not adopted. The internal groove diversion channel 46 and / or the external groove diversion channel 36 in Embodiment 1 are closed, and a heat conduction medium is filled in the internal groove diversion channel 46 and / or the external groove diversion channel 36. For example, silicone oil has the characteristics of being resistant to high and low temperatures, and it can well fill the tiny voids in the channels and evenly conduct the heat or cold of the direct heat conduction pipe 24.

[0043] Embodiment 6: On the basis of the above special embodiment, the free strut 54 is in the form of a catheter with an inner cavity. After the free strut 54 penetrates through the column block 53, its inner cavity can communicate with the inner cavity of the straight-through heat-conducting tube 24, but a reliable sealing plug is sleeved at the end of the free strut 54. Replace the phase change material: The replacement period of the paraffin-based PCM (with a melting point usually of 25 °C) phase change material in this solution is 12 - 24 months. When replacing the phase change material, after opening the sealing plugs of the upper and lower free struts 54, the phase change material in the straight-through heat-conducting tube 24 can all flow out from the bottom and be emptied when it is in a liquid state, and then new phase change material is injected from the bottom upwards until it overflows from the top, and then the ports of the upper and lower column blocks are sealed.

[0044] The above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention.

Claims

1. A two-phase cooling isolated heat exchange cabinet for a high-performance computer, comprising a cabinet unit (1) and a corrugated bare wall (2), characterized in that, The invention also comprises a medium switching system (5) and a reciprocating drive mechanism (6). The corrugated bare wall (2) comprises a corrugated plate (21) and a straight heat conducting pipe (24). The inner side of the corrugated plate (21) has an inner groove (22) and the outer side has an outer groove (23). A plurality of parallel straight heat conducting pipes (24) are vertically penetrated and fixed from the center of the side wall of each side groove. The straight heat conducting pipes (24) are linear. Each vertical straight heat conducting pipe (24) simultaneously penetrates a plurality of transverse inner grooves (22) and a plurality of A transverse outer groove (23) is formed, a solid-liquid two-phase medium is filled in the straight heat conducting pipe (24), and a medium switching system (5) for driving the solid-liquid two-phase medium in the straight heat conducting pipe (24) to flow back and forth is fixed at the bottom and top of the corrugated plate (21), the medium switching system (5) comprising a lower active cavity (51) and an upper follower cavity (52), the lower active cavity (51) being fixed to the bottom of the corrugated plate (21), and the upper follower cavity (52) being fixed to the corrugated plate (21), the bottom and top of the straight heat conducting pipe (24) are respectively connected to the lower active cavity (51) and the upper follower cavity (52), column blocks (53) are respectively installed in the upper and lower end pipe openings of the straight heat conducting pipe (24), the outer end of each column block (53) is connected to a free support rod (54), and a limit baffle (55) is installed on the free support rod (54), and the limit baffle (55) is respectively located in the lower active cavity (51) and the upper follower cavity (52); A breathing nozzle (56) is provided at the top or side of the upper follower chamber (52); the reciprocating drive mechanism (6) is used to alternately provide positive and negative pressures to the lower active chamber (51) to increase or decrease the gas or liquid in the lower active chamber (51), thereby driving each column block (53) to move upward or downward in the corresponding straight heat conducting pipe (24), thereby driving the solid-liquid two-phase medium in the straight heat conducting pipe (24) to reciprocate between adjacent inner grooves (22) and outer grooves (23).

2. The two-phase cooling isolation heat exchange cabinet machine of the high-performance computer according to claim 1, wherein, The side wall (13) of the cabinet unit at least comprises a corrugated bare wall (2), or an outer side plate (31) is fixed on the outer side of the corrugated bare wall (2), or an inner side plate (41) is fixed on the inner side of the corrugated bare wall (2).

3. The two-phase cooling isolation heat exchange cabinet for high-performance computers according to claim 1, wherein The reciprocating drive mechanism (6) comprises a base (61) and a micro motor (66). The base (61) is fixed to the bottom of the lower active chamber (51). Piston cylinders (62) are fixedly mounted on the base (61). A piston (63) is sleeved in the piston cylinder (62). A breathing tube (64) is connected to the far end of the piston cylinder (62). The breathing tube (64) is in communication with the inner cavity of the lower active chamber (51). The lower active chamber (51) contains fluid. The micro motor (66) drives the piston (63) to reciprocate through a linear drive mechanism.

4. The two-phase cooling isolation heat exchange cabinet of the high-performance computer according to claim 3, characterized in that, The linear drive mechanism includes a sealing cover (65) fixedly installed on the base (61) respectively. At both ends inside the sealing cover (65), shaft seats are provided and a pair of parallel turntables (67) are installed. Shafts are provided at the centers of the outer sides of the two turntables (67), and each shaft is installed in the corresponding shaft seat. An eccentric shaft (68) is connected between the two turntables (67); a T-shaped rod member (69) is fixedly provided at the center of the proximal end of the piston (63). The T-shaped rod member (69) includes a cross bar and a vertical bar. A strip-shaped hole is provided on the vertical bar, and the strip-shaped hole is sleeved outside the eccentric shaft (68). The micro motor (66) is fixedly installed at the proximal end of the base (61), and the rotating shaft of the micro motor (66) is in transmission connection with the rotating shaft of the turntable (67).

5. The two-phase cooling isolated heat exchange cabinet of the high-performance computer according to claim 1, characterized in that, It further includes an external circulation system (3). The external circulation system (3) includes an outer side plate (31), a front sealing plate (32), an external reflux cavity (34), a rear wall cavity (37) and an external exhaust fan (38). The outer side plate (31) is fixed to the outer side wall of the corrugated plate (21). A plurality of outer groove diversion channels (36) are formed between the outer side plate (31) and the outer groove (23). The front sealing plate (32) is fixed to the front end of the corrugated plate (21), and a plurality of external air inlets (33) are formed on the front sealing plate (32). Each external air inlet (33) corresponds to the head end of the corresponding outer groove diversion channel (36). The external reflux cavity (34) is fixed to the rear end of the corrugated plate (21). The rear end of each outer groove diversion channel (36) communicates with the inner cavity of the external reflux cavity (34). The rear wall cavity (37) is fixed to the outside of the rear wall (14) of the cabinet body of the cabinet unit. The external reflux cavity (34) communicates with the inner cavity of the rear wall cavity (37). An opening is formed at the rear end of the rear wall cavity (37) and the external exhaust fan (38) is installed therein.

6. The two-phase cooling isolated heat exchange cabinet machine of the high-performance computer according to claim 1, characterized in that It further includes an internal circulation system (4). The internal circulation system (4) includes an inner side plate (41), an internal reflux cavity (43), a top wall cavity (47) and an internal exhaust fan (48). The inner side plate (41) is fixed to the inner side wall of the corrugated plate (21). A plurality of inner groove diversion channels (46) are formed between the inner side plate (41) and the inner groove (22). A series of internal air inlets (42) are respectively provided on the surface of the inner side plate (41). The inner groove diversion channels (46) communicate with the inner cavity of the cabinet body (11) through the internal air inlets (42). The internal reflux cavity (43) is fixed at a position closer to the rear of the inner side plate (41). The rear end of each inner groove diversion channel (46) communicates with the inner cavity of the internal reflux cavity (43). A main outlet pipe (45) is installed at the top of the internal reflux cavity (43). The top wall cavity (47) is provided at the top of the inner cavity of the cabinet body (11). The internal exhaust fan (48) is installed at the center of the top wall cavity (47). The main outlet pipe (45) communicates with the inner cavity of the top wall cavity (47).

7. The two-phase cooling isolation heat exchange cabinet for high-performance computers according to claim 1, characterized in that The free strut (54) adopts a screw-type free strut. Double nuts are installed on the thread at the end of the screw-type free strut. The limit stop is located between the double nuts and fixed. The double nuts are adjusted to change the position of the limit stop.

8. The two-phase cooling isolation heat exchange cabinet machine of the high-performance computer according to claim 1, characterized in that, The center of the inner groove (22) and / or the outer groove (23) of the corrugated plate (21) is provided with a rib plate (25) along the transverse direction.

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