Heat dissipation system

Abstract

The invention discloses a heat dissipation system which comprises a cylinder body, a heat dissipation device, a heat dissipation device and a heat dissipation device. The piston is arranged in the closed groove and is attached to the side wall; the actuating module comprises a memory metal spring, a liquid supply system and a first flow channel; the heat dissipation system comprises a first state and a second state, in the first state, the memory metal spring absorbs heat of a heat source, a low-temperature phase is converted into a high-temperature phase, the memory metal spring extends to push the piston to move upwards, the pressure intensity in the steam chamber is reduced, meanwhile, the cooling liquid absorbs the heat of the heat source, and at least part of the cooling liquid reaches the boiling point and is gasified into steam; in the second state, the liquid supply system provides low-temperature liquid, the liquid makes contact with the memory metal spring, the memory metal spring is converted into a low-temperature phase from a high-temperature phase, and the memory metal spring contracts to pull the piston to move downwards.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat dissipation system, in particular to an evaporative cooling heat dissipation system.

BACKGROUND

[0002] Evaporative cooling is based on the principle of using the latent heat of vaporization of fluid to take away heat. Since the latent heat of vaporization of fluid is much larger than the specific heat of fluid, the cooling effect of evaporative cooling is more significant. It is well known that the boiling point of refrigerant is closely related to its pressure, the lower the pressure, the lower the boiling point. Therefore, maintaining negative pressure in the heat dissipation system can lower the boiling point of the refrigerant, so that the refrigerant can boil at a lower temperature, thereby effectively taking away the heat of the heat source. However, in order to maintain the heat dissipation system in a negative pressure state, a powerful force is needed to resist atmospheric pressure. The traditional heat dissipation system often has an additional vacuum pump or negative pressure compressor to provide it. However, the use of a vacuum pump or negative pressure compressor increases energy consumption and operating costs of the heat dissipation system.

SUMMARY

[0003] The purpose of the present application is to provide a heat dissipation system that uses the heat energy of the heat source to provide energy to the memory metal spring, and then uses the memory metal spring to achieve a negative pressure state in the vapor chamber, thereby improving the cooling efficiency of the cooling liquid and reducing energy consumption.

[0004] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0005] A heat dissipation system, characterized in that, comprising: a cylinder body, comprising an upper wall, a lower wall, a side wall, and a closed groove surrounded by the upper wall, the lower wall and the side wall, the closed groove comprising a steam chamber, the steam chamber containing a cooling liquid, the cooling liquid being in contact with the lower wall, the lower wall being above a heat source; a piston being arranged in the closed groove and being in contact with the side wall, the steam chamber being between the piston and the lower wall; an actuating module, the actuating module comprising a memory metal spring, a liquid supply system and a first flow channel, the memory metal spring comprising an upper end and a lower end, the upper end being arranged at the bottom of the piston, the lower end being arranged at the lower wall, the first flow channel being in communication with the outside through a liquid outlet; the heat dissipation system comprising a first state and a second state, and being able to cycle between the first state and the second state under the drive of the actuating module; in the first state, the liquid supply system does not provide liquid, the memory metal spring absorbs the heat of the heat source, changes from a low-temperature phase to a high-temperature phase, the memory metal spring is elongated to push the piston to move upward, so that the pressure in the steam chamber becomes smaller, at the same time, the cooling liquid absorbs the heat of the heat source, and at least part of the cooling liquid reaches the boiling point and vaporizes into steam; in the second state, the liquid supply system provides liquid, the liquid flows through the first flow channel and contacts the memory metal spring, so that the memory metal spring changes from a high-temperature phase to a low-temperature phase, and the memory metal spring is contracted to pull the piston to move downward.

[0006] Further, the memory metal spring is hollow, the first flow channel is located inside the memory metal spring, or the memory metal spring is sleeved with a sleeve pipe, the pipeline of the sleeve pipe is the first flow channel, and the memory metal spring is located in the first flow channel.

[0007] Further, the liquid supply system comprises a liquid inlet pipe, the side wall is provided with a first liquid inlet, the piston is provided with a second flow channel, the liquid inlet pipe is connected with the first liquid inlet, and the second flow channel is in communication with the first flow channel; in the first state, the first liquid inlet is blocked by the piston wall, and the liquid cannot enter the second flow channel; in the second state, the first liquid inlet is aligned with the second flow channel, and the liquid enters the first flow channel through the second flow channel.

[0008] Further, the second flow channel comprises a first pipeline, a second pipeline, a third pipeline and a one-way valve ball which is movable in the second pipeline and the third pipeline, the first pipeline and the third pipeline are in a column shape, the second pipeline is in a circular truncated cone shape, the first pipeline has a first diameter in cross section, the one-way valve ball has a second diameter, the third pipeline has a third diameter in cross section, the second diameter is greater than the first diameter, and the second diameter is less than the third diameter.

[0009] Further, the side wall is provided with a first steam passage, and the piston is provided with a second steam passage, and the second steam passage is provided with a first one-way valve; in the second state, the piston moves downward, and after the piston moves downward to a certain position, the lower end of the first steam passage is communicated with the steam chamber, the upper end of the first steam passage is communicated with the second steam passage, the pressure in the steam chamber is greater than the atmospheric pressure, at this time, the steam enters the first flow channel through the first steam passage and the second steam passage, and then is discharged through the liquid outlet.

[0010] Further, the side wall is provided with a first steam passage, and the piston is provided with a second steam passage, and the second steam passage is provided with a first one-way valve; in the second state, the piston moves downward, and after the piston moves downward to a certain position, the lower end of the first steam passage is communicated with the steam chamber, the upper end of the first steam passage is communicated with the second steam passage, the pressure in the steam chamber is greater than the atmospheric pressure, at this time, the steam enters the first flow channel through the first steam passage and the second steam passage, and then is discharged through the liquid outlet.

[0011] Further, the piston further comprises a safety valve, the safety valve comprises a third steam passage and a second one-way valve arranged in the third steam passage, one end of the third steam passage is communicated with the first flow channel, and the other end is communicated with the steam chamber.

[0012] Further, a guide rod is further included, the side wall is provided with a guide groove extending in the upward and downward directions, the guide rod is fixed to the piston, and the piston drives the guide rod to move upward and downward along the guide groove.

[0013] Further, the first flow channel and the liquid outlet are communicated through a liquid discharge pipe, the liquid discharge pipe is arranged on the lower wall, and the liquid discharge pipe is provided with a third one-way valve.

[0014] A heat dissipation system, characterized in that, comprising: a cylinder, comprising an upper wall, a lower wall, a side wall, and a closed groove surrounded by the upper wall, the lower wall and the side wall, the closed groove comprising a steam chamber, the steam chamber containing a cooling liquid, the cooling liquid being in contact with the lower wall, the lower wall being above a heat source; a piston, being in the closed groove and being in contact with the side wall, the steam chamber being between the piston and the lower wall; an actuating module, the actuating module comprising a memory metal spring, a liquid supply system and a first flow channel, the memory metal spring comprising an upper end and a lower end, the upper end being arranged at the bottom of the piston, the lower end being arranged at the lower wall, the first flow channel being in communication with the outside through a liquid outlet; the heat dissipation system comprising a first state and a second state, and being able to cycle between the first state and the second state under the drive of the actuating module; in the first state, the liquid supply system provides hot water, the hot water flows through the first flow channel and contacts the memory metal spring, so that the memory metal spring changes from a low-temperature phase to a high-temperature phase, the memory metal spring is elongated to push the piston to move upward, so that the pressure in the steam chamber becomes smaller, at the same time, the cooling liquid absorbs the heat of the heat source, and at least part of the cooling liquid evaporates into steam; in the second state, the liquid supply system provides cold water, the cold water flows through the first flow channel and contacts the memory metal spring, so that the memory metal spring changes from a high-temperature phase to a low-temperature phase, the memory metal spring is contracted to pull the piston to move downward.

[0015] Further, the liquid supply system comprises a hot water inlet pipe and a cold water inlet pipe, the side wall is provided with a first liquid inlet and a second liquid inlet, the piston is provided with a second flow channel and a third flow channel, the cold water inlet pipe is connected with the first liquid inlet, the hot water inlet pipe is connected with the second liquid inlet, and the second flow channel is in communication with the first flow channel; in the first state, the first liquid inlet is blocked by the piston wall, the second liquid inlet is aligned with the third flow channel, and the hot water enters the first flow channel through the third flow channel; in the second state, the second liquid inlet is blocked by the piston wall, the first liquid inlet is aligned with the second flow channel, and the cold water enters the first flow channel through the second flow channel.

[0016] Further, the side wall is provided with a first steam passage, and the piston has a second steam passage; in the second state, the piston moves downward, after the piston moves downward to a certain position, the lower end of the first steam passage is in communication with the steam chamber, the upper end of the first steam passage is in communication with the second steam passage, the steam enters the first flow channel through the first steam passage and the second steam passage, and then is discharged through the liquid outlet.

[0017] Further, the side wall is provided with a first liquid supplement groove and a liquid supplement port, and the piston is provided with a second liquid supplement groove; when the first state ends and the second state starts, the second liquid supplement groove is in communication with the liquid supplement port, and the cooling liquid enters the second liquid supplement groove through the liquid supplement port; in the second state, the piston moves downward, after the piston moves downward to a certain position, the first liquid supplement groove is in communication with the steam chamber, and the cooling liquid in the first liquid supplement groove enters the steam chamber.

[0018] Compared with the prior art, the heat dissipation system provided by the application has the following beneficial effects:

[0019] The memory metal spring is used to keep the evaporation chamber in a negative pressure state, so that the cooling liquid in the evaporation chamber can be boiled and vaporized at a low boiling point to absorb a large amount of heat, thereby improving the heat dissipation efficiency of the heat dissipation system. In addition, the memory metal spring can also be used to convert the heat energy of the heat source into the kinetic energy of the memory metal spring by using the heat absorption and elongation characteristics of the memory metal spring, so that the heat dissipation system can keep the evaporation chamber in a negative pressure state without consuming or only consuming a small amount of additional energy, which makes the heat dissipation system not only maintain high heat dissipation efficiency, but also reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the heat dissipation system of the first embodiment of the application;

[0021] Figure 2 is a schematic view of the piston in the heat dissipation system of the first embodiment or the second embodiment of the application;

[0022] Figure 3 is a schematic view of the heat dissipation system when the piston of the first embodiment reaches the highest point;

[0023] Figure 4 is a schematic view of the heat dissipation system when the piston of the first embodiment moves to a certain position in the middle;

[0024] Figure 5 is a schematic view of the heat dissipation system when the piston of the first embodiment reaches the lowest point;

[0025] Figure 6 is a sectional view of the heat dissipation system of the first embodiment in three states;

[0026] Figure 7 is a sectional view of the heat dissipation system of the first embodiment or the second embodiment in three states from another perspective;

[0027] Figure 8 is a sectional view of the heat dissipation system of the second embodiment in three states.

[0028] Explanation of reference signs in the drawings of the specification:

[0029] Heat dissipation system 100 Cylinder 1 Upper wall 11 Lower wall 12 Liquid discharge pipe 121 Third one-way valve 122 Side wall 13 Liquid supplement port 131 First liquid inlet port 132 Second liquid inlet port 132' Liquid injection port 133 Liquid outlet port 134 First steam passage 135 First liquid supplement groove 136 Guide groove 137 Sealing groove 14 Steam chamber 141 Piston 2 Second flow channel 21 First pipe 211 Second pipe 212 Third pipe 213 One-way valve ball 214 Second steam passage 22 Exhaust passage 221 Transfer passage 222 First one-way valve 223 Safety valve 23 Third steam passage 231 Second one-way valve 232 Second liquid supplement groove 24 Connection port 25 Guide rod 26 Actuation module 3 Memory metal spring 31 Upper end 311 Lower end 312 First flow channel 32 Liquid supply system 33 Liquid inlet pipe 331 Liquid supplement pipe 332 Heat source 4 DETAILED DESCRIPTION

[0030] In order to better understand the purpose, structure, features and effects of the application, the application will be further described in conjunction with the drawings and specific embodiments.

[0031] Memory metal is a kind of special metal that can automatically restore its plastic deformation to the original shape at a certain temperature, and its basic feature is shape memory effect, that is, the shape of memory metal changes within a certain temperature range, and a recovery stress is generated. The phenomenon that only the shape of high-temperature austenite phase has memory is called single-pass shape memory effect, and the phenomenon that the shape of low-temperature martensite phase also has memory is called double-pass shape memory effect.

[0032] The spring made of memory metal is placed in hot water or heated by other heat sources, and the length of the spring is immediately elongated, and when it is placed in cold water, it will immediately restore to the original shape. By using this performance, the memory metal spring can be used as a driving element to realize the driving function.

[0033] The first embodiment of the present application:

[0034] Reference Figure 1 The heat dissipation system 100 in the first embodiment includes a cylinder body 1, a piston 2 and an actuating module 3. The cylinder body 1 is in a columnar shape, the piston 2 is located in the cylinder body 1, and the actuating module 3 includes a memory metal spring 31, a liquid supply system 33 and a first flow channel 32. The liquid supply system 33 includes a liquid inlet pipe 331 and a liquid supplement pipe 332.

[0035] The memory metal spring 31 is a hollow spring, and the first flow channel 32 is located inside the memory metal spring 31. Of course, in other embodiments, a hose can be provided outside the memory metal spring 31, the pipeline of the hose is the first flow channel 32, and the memory metal spring 31 is located in the first flow channel 32. The liquid supply system 33 is used to provide cooling liquid and liquid for phase change of the memory metal spring 31. In this embodiment, the cooling liquid is water or methanol, ethanol or other liquid with a lower boiling point than water, and the liquid for phase change of the memory metal spring 31 is cold water.

[0036] Reference Figure 2 The piston 2 is internally provided with a second flow channel 21, a second steam passage 22 and a safety valve 23, and the outer wall of the piston 2 is concavely provided with a second liquid supplement groove 24. The bottom of the piston 2 is provided with a connecting port 25. The second steam passage 22 includes an exhaust passage 221 and a transfer passage 222. The cross-sectional diameter of the exhaust passage 221 is smaller than that of the transfer passage 222. The exhaust passage 221 is provided with a first one-way valve 223, and the transfer passage 222 is directly connected with the connecting port 25.

[0037] Specifically, the second flow channel 21 includes a first pipe 211, a second pipe 212 and a third pipe 213, the first pipe 211 and the third pipe 213 are cylindrical, the second pipe 212 is a circular truncated cone, the second pipe 212 connects the first pipe 211 and the third pipe 213, a movable first one-way valve ball 214 is arranged in the second pipe 212 or the third pipe 213, the first pipe 211 has a first diameter in cross section, the first one-way valve ball 214 has a second diameter, the third pipe 213 has a third diameter in cross section, the second diameter is greater than the first diameter, the second diameter is less than the third diameter, and the third pipe 213 is directly connected with the transfer channel 222. The safety valve 23 includes a third steam channel 231 and a second one-way valve 232 arranged in the third steam channel 231, and the third steam channel 231 is directly connected with the transfer channel 222.

[0038] Referring again to Figure 1 , a guide rod 26 is fixed on the wall of the piston 2, and a guide groove 137 extending in the up-down direction is recessed in the inner side of the side wall 13, the guide rod 26 can move up and down along the guide groove 137, and the guide groove 137 can limit the guide rod 26 in the circumferential direction of the cylindrical cylinder body 1, which can avoid the rotation of the piston 2 during movement and ensure the moving direction of the piston 2.

[0039] Referring to Figure 3 , Figure 4 and Figure 5 , the cylinder body 1 includes an upper wall 11, a lower wall 12, a side wall 13, and a closed groove 14 surrounded by the upper wall 11, the lower wall 12 and the side wall 13, the piston 2 is movably arranged in the closed groove 14 and abuts against the side wall 13, the closed groove 14 includes a steam chamber 141 between the piston 2 and the lower wall 12, the side wall 13 is provided with a liquid supplementing port 131, a first liquid inlet port 132, a liquid injection port 133 and a liquid outlet port 134, and the inner side of the side wall 13 is provided with a first steam channel 135 and a first liquid supplementing groove 136, the liquid supplementing port 131 is connected with a liquid supplementing pipe 332, and the first liquid inlet port 132 is connected with a liquid inlet pipe 331.

[0040] The memory metal spring 31 includes an upper end portion 311 and a lower end portion 312, the upper end portion 311 is arranged at the bottom of the piston 2, the lower end portion 312 is arranged at the lower wall 12, and the inlet of the first flow channel 32 is connected with the connecting port 25;

[0041] The first flow channel 32 is connected with the liquid outlet port 134 through a liquid discharge pipe 121, the liquid discharge pipe 121 is arranged at the lower wall 12, and a third one-way valve 122 is arranged in the liquid discharge pipe 121.

[0042] Before the heat dissipation system 100 works, a small amount of cooling liquid is injected into the vapor chamber 141 through the liquid injection port 133, and the cooling liquid is in contact with the lower wall 12. The lower wall 12 is located above the heat source 4 and is in contact with the heat source 4 to facilitate the transfer of heat from the heat source 4 to the lower wall 12, so that the heat source 4 can heat the cooling liquid and the memory metal spring 31. Of course, in other embodiments, a uniform temperature plate or other element with good heat conduction performance can also be provided between the lower wall 12 and the heat source 4.

[0043] The heat dissipation system 100 includes two states, a first state and a second state, and can complete the circulation between the two states under the drive of the actuating module 3.

[0044] The operation of the heat dissipation system 100 of the first embodiment will be described in detail below:

[0045] Reference Figure 6 and Figure 7 In the first state, the memory metal spring 31 absorbs the heat of the heat source 4, and the internal structure begins to change from the low-temperature phase to the high-temperature phase. The memory metal spring 31 is elongated to push the piston 2 to move upward, thereby causing the volume of the evaporation chamber to increase and the pressure to decrease. At the same time, the decrease in pressure will cause the boiling point of the cooling liquid to decrease. The cooling liquid heated by the heat source 4 will all or partially reach the boiling point and be vaporized into steam. In this process, the vaporization of the cooling liquid will absorb a large amount of heat, thereby cooling the heat source 4.

[0046] The memory metal spring 31 continues to push the piston 2 to move upward until the internal structure of the memory metal spring 31 completely changes to the high-temperature phase. At this time, the memory metal spring 31 is stretched to the longest, and the piston 2 stops moving upward. The first state of the heat dissipation system 100 ends, and the second state begins.

[0047] In the second state, the second liquid supplementing groove 24 is in communication with the liquid supplementing port 131, and the liquid supplementing pipe 332 injects cooling liquid into the second liquid supplementing groove 24 through the liquid supplementing port 131. At the same time, the first liquid inlet port 132 is aligned with the second flow channel 21, and the liquid provided by the liquid supply system 33 enters the second flow channel 21 through the first liquid inlet port 132. Here, the liquid provided by the liquid supply system 33 is cold water, which enters the second flow channel 21 and pushes the first one-way valve ball 214 in the second pipe 212 to the third pipe 213. Subsequently, the cold water reaches the first flow channel 32 through the transfer pipe.

[0048] The cold water in the first flow channel 32 is in contact with the memory metal spring 31, causing the internal structure of the memory metal spring 31 to change from the high-temperature phase to the low-temperature phase. The memory metal spring 31 begins to contract, thereby pulling the piston 2 to move downward. When the piston 2 moves downward to a certain position, the second liquid supplementing groove 24 is in communication with the first liquid supplementing groove 136, and the lower part of the first liquid supplementing groove 136 is in communication with the vapor chamber 141. The cooling liquid in the second liquid supplementing groove 24 enters the vapor chamber 141 through the first liquid supplementing groove 136.

[0049] When the piston 2 moves down to a certain position, the lower end of the first steam passage 135 is in communication with the steam chamber 141, the upper end of the first steam passage 135 is in communication with the second steam passage 22, steam enters the first flow channel 32 through the first steam passage 135 and the second steam passage 22, and finally is discharged through the liquid outlet 134.

[0050] The memory metal spring 31 continues to pull the piston 2 to move down until the internal structure of the memory metal spring 31 is completely converted into a low-temperature phase, at which time the memory metal spring 31 returns to the original state, the piston 2 stops moving down, the second state of the heat dissipation system 100 ends, and the first state begins. At this time, because the supplement of the cooling liquid has been completed through the liquid supplementing port 131, the first liquid supplementing groove 136 and the second liquid supplementing groove 24, it is not necessary to manually inject the cooling liquid through the liquid injecting port 133, and the heat dissipation system 100 can automatically complete the subsequent circulation to cool the heat source 4.

[0051] In the second state, cold water flows to the first flow channel 32 through the second flow channel 21 and the transfer passage 222. In order to avoid the cold water flowing into the exhaust passage 221, the first one-way valve 223 is arranged at a position close to the transfer passage 222 in the exhaust pipeline, and the first one-way valve 223 will block the exhaust pipeline when the cold water flows in the direction of the exhaust passage 221.

[0052] When the piston 2 moves down to a certain position, steam passes through the second steam passage 22, and the steam may enter the third pipeline 213, at which time the one-way valve ball 214 is pushed by the steam to the second pipeline 212, thereby blocking the second pipeline 212.

[0053] The first flow channel 32 and the liquid outlet 134 are connected in communication through a liquid discharge pipe 121, which is arranged on the lower wall 12. When the cold water flows through the liquid discharge pipe 121, it can also carry away part of the heat, thereby improving the heat dissipation efficiency of the heat dissipation system 100.

[0054] In the first state, it is possible that the cooling liquid has been largely vaporized, and the memory metal spring 31 has not pushed the piston 2 to move or the moving distance is not enough. In this case, the generation of a large amount of steam will inevitably lead to the increase of the pressure in the steam chamber 141, and the vaporized steam is re-liquefied. In order to avoid this situation, the third steam passage 231 in the safety valve 23 is designed to be directly connected with the steam chamber 141 at one end, and when the air pressure in the steam chamber 141 is too high, the steam can rush through the one-way valve and be discharged through the first flow channel 32.

[0055] In the first state, the heat dissipation system 100 uses the memory metal spring 31 to keep the evaporation chamber in a negative pressure state, so that the coolant in the steam chamber 141 can boil and vaporize at a low boiling point, absorb a large amount of heat, and improve the heat dissipation efficiency of the heat dissipation system 100; In addition, the memory metal spring 31 can be heated to a specific temperature to extend, so that the heat dissipation system 100 can convert the heat energy of the heat source 4 into the kinetic energy of the memory metal spring 31, without consuming additional energy to keep the steam chamber 141 in a negative pressure state, which enables the heat dissipation system 100 to maintain high-efficiency heat dissipation while reducing energy consumption.

[0056] The second embodiment of the present application is as follows:

[0057] Similar to the first embodiment, the heat dissipation system 100 in the second embodiment includes a cylinder 1, a piston 2, and an actuating module 3, the piston 2 is located in the cylinder 1, and the actuating module 3 includes a memory metal spring 31, a liquid supply system 33, and a first flow channel 32, wherein the liquid supply system 33 includes a liquid inlet pipe 331 and a liquid supplement pipe 332, the memory metal spring 31 is a hollow spring, and the first flow channel 32 is located inside the memory metal spring 31.

[0058] Referring to Figure 2 , the piston 2 is internally provided with a second flow channel 21, a second steam passage 22, and a safety valve 23, the outer wall of the piston 2 is concavely provided with a second liquid supplement groove 24, the bottom of the piston 2 is provided with a connecting port 25, the second steam passage 22 includes a transfer passage 222 directly connected with the connecting port 25, the second flow channel 21 is directly connected with the transfer passage 222, and the safety valve 23 includes a third steam passage 231 and a one-way valve located in the third steam passage 231, the third steam passage 231 is directly connected with the transfer passage 222.

[0059] Referring to Figure 5 and Figure 6 , the cylinder 1 includes an upper wall 11, a lower wall 12, a side wall 13, and a closed groove 14 surrounded by the upper wall 11, the lower wall 12, and the side wall 13, the piston 2 is movably arranged in the closed groove 14 and attached to the side wall 13, the closed groove 14 includes a steam chamber 141 located between the piston 2 and the lower wall 12, the side wall 13 is provided with a liquid supplement port 131, a first liquid inlet port 132, a second liquid inlet port 132', a liquid injection port 133, and a liquid outlet port 134 which are in communication with the outside, and the inner side of the side wall 13 is provided with a first steam passage 135 and a first liquid supplement groove 136.

[0060] The memory metal spring 31 includes an upper end 311 and a lower end 312, the upper end 311 is arranged at the bottom of the piston 2, the lower end 312 is arranged at the lower wall 12, the inlet of the first flow channel 32 is connected with the connecting port 25, and the liquid or steam discharged from the outlet of the first flow channel 32 is discharged to the outside through the liquid outlet port 134.

[0061] The operation of the heat dissipation system 100 of the second embodiment is described in detail as follows:

[0062] Referring to Figure 8 , in the first state, the first liquid inlet 132 is blocked by the wall of the piston 2, the second liquid inlet 132' is aligned with the third flow channel, and the hot water provided by the liquid supply pipe 331 enters the first flow channel 32 through the second liquid inlet 132' and the third flow channel. After the memory metal spring 31 contacts the hot water, the internal structure of the memory metal spring 31 starts to change from the low-temperature phase to the high-temperature phase, and then the memory metal spring 31 is elongated to push the piston 2 to move upward. By providing hot water through the liquid supply system 33, the reaction speed of the memory metal spring 31 can be accelerated, and the process of the first state can be accelerated. In addition, by controlling the switch of the liquid supply system 33, the hot water can not enter the second liquid inlet 132', and at this time the memory metal spring 31 can still absorb the heat of the heat source 4 as described in the first embodiment to complete the change from the low-temperature phase to the high-temperature phase.

[0063] With the upward movement of the piston 2, the volume of the evaporation chamber increases, the pressure decreases, and the boiling point of the cooling liquid decreases, causing the cooling liquid heated by the heat source 4 to all or partially reach the boiling point and vaporize into steam. In this process, the vaporization of the cooling liquid absorbs a large amount of heat, thereby cooling the heat source 4.

[0064] The memory metal spring 31 continues to push the piston 2 to move upward until the internal structure of the memory metal spring 31 completely changes to the high-temperature phase, at which time the memory metal spring 31 is at its longest and the piston 2 stops moving upward, and the first state of the heat dissipation system 100 ends and the second state begins.

[0065] At this time, the second liquid supplement tank 24 is in communication with the liquid supplement port 131, and the liquid supplement pipe 332 injects cooling liquid into the second liquid supplement tank 24 through the liquid supplement port 131; at the same time, the first liquid inlet 132 is aligned with the second flow channel 21, and the cold water provided by the liquid supply pipe 331 enters the second flow channel 21 through the first liquid inlet 132. After the cold water enters the second flow channel 21, the first one-way valve ball 214 in the second pipe 212 is pushed to the third pipe 213, and then the cold water reaches the first flow channel 32 through the transfer pipe.

[0066] The cold water in the first flow channel 32 contacts the memory metal spring 31, causing the internal structure of the memory metal spring 31 to change from the high-temperature phase to the low-temperature phase, and the memory metal spring 31 starts to contract, thereby pulling the piston 2 to move downward. When the piston 2 moves downward to a certain position, the second liquid supplement tank 24 is in communication with the first liquid supplement tank 136, and at this time the first liquid supplement tank 136 is in communication with the steam chamber 141 below, and the cooling liquid in the second liquid supplement tank 24 enters the steam chamber 141 through the first liquid supplement tank 136.

[0067] When the piston 2 moves down to a certain position, the lower end of the first steam passage 135 communicates with the steam chamber 141, the upper end of the first steam passage 135 communicates with the second steam passage 22, steam enters the first flow channel 32 through the first steam passage 135 and the second steam passage 22, and finally is discharged through the liquid outlet 134.

[0068] The memory metal spring 31 continues to pull the piston 2 to move down until the internal structure of the memory metal spring 31 is completely converted into a low-temperature phase, at which time the memory metal spring 31 returns to the original state, the piston 2 stops moving down, the second state of the heat dissipation system 100 ends, and the first state begins. At this time, because the supplement of the cooling liquid has been completed through the liquid supplement outlet 131, the first liquid supplement groove 136 and the second liquid supplement groove 24, it is not necessary to manually inject the cooling liquid through the liquid injection outlet 133, and the heat dissipation system 100 can automatically complete the subsequent cycle to cool the heat source 4.

[0069] The above detailed description is only for the preferred embodiments of the present application, and does not limit the patent scope of the present application, so that equivalent technical changes made according to the content of the present application description and drawings are included in the patent scope of the present application.

Claims

1. A heat dissipation system, characterized by, The application relates to a cylinder, a piston and an actuating module. The cylinder comprises an upper wall, a lower wall, a side wall and a closed groove surrounded by the upper wall, the lower wall and the side wall, wherein the closed groove comprises a steam chamber, the steam chamber contains cooling liquid, the cooling liquid is in contact with the lower wall, and the lower wall is above a heat source. The piston is arranged in the closed groove and is in contact with the side wall, and the steam chamber is between the piston and the lower wall. The actuating module comprises a memory metal spring, a liquid supply system and a first flow channel, the memory metal spring comprises an upper end and a lower end, the upper end is arranged at the bottom of the piston, the lower end is arranged at the lower wall, and the first flow channel is in communication with the outside through a liquid outlet. The heat dissipation system comprises a first state and a second state and can circulate between the first state and the second state under the drive of the actuating module. In the first state, the liquid supply system does not provide liquid, the memory metal spring absorbs the heat of the heat source, changes from a low-temperature phase to a high-temperature phase, is elongated to push the piston to move upwards, the pressure in the steam chamber is reduced, the cooling liquid absorbs the heat of the heat source, and at least part of the cooling liquid reaches the boiling point and is vaporized into steam. In the second state, the liquid supply system provides liquid, the liquid flows through the first flow channel and is in contact with the memory metal spring, so that the memory metal spring changes from the high-temperature phase to the low-temperature phase and is contracted to pull the piston to move downwards.

2. The heat dissipating system of claim 1, wherein, The memory metal spring is hollow, the first flow channel is arranged in the memory metal spring, or the memory metal spring is sleeved with a sleeve pipe, the pipeline of the sleeve pipe is the first flow channel, and the memory metal spring is arranged in the first flow channel.

3. The heat dissipating system of claim 1, wherein, The liquid supply system comprises a liquid inlet pipe, the side wall is provided with a first liquid inlet, the piston is provided with a second flow channel, the liquid inlet pipe is connected with the first liquid inlet, and the second flow channel is in communication with the first flow channel. In the first state, the first liquid inlet is blocked by the piston wall, and the liquid cannot enter the second flow channel. In the second state, the first liquid inlet is aligned with the second flow channel, and the liquid enters the first flow channel through the second flow channel.

4. The heat dissipating system of claim 3, wherein, The second flow channel comprises a first pipeline, a second pipeline, a third pipeline and a one-way valve ball which can move in the second pipeline and the third pipeline, the first pipeline and the third pipeline are in a column shape, the second pipeline is in a circular truncated cone shape, the first pipeline has a first diameter in a cross section, the one-way valve ball has a second diameter, the third pipeline has a third diameter in a cross section, the second diameter is larger than the first diameter, and the second diameter is smaller than the third diameter.

5. The heat dissipating system of claim 1, wherein, The side wall is provided with a first steam passage, the piston is provided with a second steam passage, and the second steam passage is provided with a first one-way valve. In the second state, the piston moves downwards, after the piston moves downwards to a certain position, the lower end of the first steam passage is in communication with the steam chamber, the upper end of the first steam passage is in communication with the second steam passage, the pressure in the steam chamber is greater than the atmospheric pressure, at this moment, steam enters the first flow channel through the first steam passage and the second steam passage and is then discharged through the liquid outlet.

6. The heat dissipating system of claim 1, wherein, The side wall is provided with a first liquid supplement groove and a liquid supplement opening, and the piston is provided with a second liquid supplement groove. The first state is terminated and the second state is started, the second liquid supplement tank is communicated with the liquid supplement port, and the cooling liquid enters the second liquid supplement tank through the liquid supplement port; In the second state, the piston moves downward, and after the piston moves downward to a certain position, the first liquid supplement tank is communicated with the steam chamber, and the cooling liquid in the first liquid supplement tank enters the steam chamber.

7. The heat dissipating system of claim 1, wherein, The piston further comprises a safety valve, the safety valve comprises a third steam passage and a second one-way valve located in the third steam passage, one end of the third steam passage is communicated with the first flow channel, and the other end is communicated with the steam chamber.

8. The heat dissipating system of claim 1, wherein, Further comprising a guide rod, the side wall is provided with a guide groove extending in the up-down direction, the guide rod is fixed to the piston, and the piston drives the guide rod to move up and down along the guide groove.

9. The heat dissipating system of claim 1, wherein, The first flow channel is communicated with the liquid outlet through a liquid discharge pipe, the liquid discharge pipe is arranged on the lower wall, and a third one-way valve is arranged in the liquid discharge pipe.

10. A heat dissipation system characterized by, Comprise: The cylinder body comprises an upper wall, a lower wall, a side wall, and a closed tank surrounded by the upper wall, the lower wall, and the side wall, the closed tank comprises a steam chamber, the steam chamber contains cooling liquid, the cooling liquid is in contact with the lower wall, and the lower wall is located above a heat source; The piston is arranged in the closed tank and is in contact with the side wall, and the steam chamber is located between the piston and the lower wall; The actuation module comprises a memory metal spring, a liquid supply system, and a first flow channel, the memory metal spring comprises an upper end portion and a lower end portion, the upper end portion is arranged at the bottom of the piston, the lower end portion is arranged at the lower wall, and the first flow channel is communicated with the outside through a liquid outlet; The heat dissipation system comprises a first state and a second state, and can cycle between the first state and the second state under the drive of the actuation module; In the first state, the liquid supply system provides hot water, the hot water flows through the first flow channel and contacts the memory metal spring, the memory metal spring changes from a low-temperature phase to a high-temperature phase, the memory metal spring is elongated to push the piston to move upward, the pressure in the steam chamber becomes smaller, and at least part of the cooling liquid evaporates into steam while the cooling liquid absorbs heat from the heat source; In the second state, the liquid supply system provides cold water, the cold water flows through the first flow channel and contacts the memory metal spring, the memory metal spring changes from a high-temperature phase to a low-temperature phase, and the memory metal spring is contracted to pull the piston to move downward.

11. The heat dissipating system of claim 10, wherein, The liquid supply system comprises a hot water inlet pipe and a cold water inlet pipe, the side wall is provided with a first liquid inlet and a second liquid inlet, the piston is provided with a second flow channel and a third flow channel, the cold water inlet pipe is connected with the first liquid inlet, the hot water inlet pipe is connected with the second liquid inlet, and the second flow channel is communicated with the first flow channel; In the first state, the first liquid inlet is blocked by the piston wall, the second liquid inlet is aligned with the third flow channel, and the hot water enters the first flow channel through the third flow channel; In the second state, the second liquid inlet is blocked by the piston wall, the first liquid inlet is aligned with the second flow channel, and the cold water enters the first flow channel through the second flow channel.

12. The heat dissipating system of claim 10, wherein, The side wall is provided with a first steam passage, and the piston has a second steam passage. In the second state, the piston moves downward. After the piston moves downward to a certain position, the lower end of the first steam channel is connected to the steam chamber, and the upper end is connected to the second steam channel. Steam enters the first flow channel through the first steam channel and the second steam channel, and then is discharged through the liquid outlet.

13. The heat dissipating system of claim 10, wherein, The sidewall is provided with a first liquid replenishment tank and a liquid replenishment port, and the piston is provided with a second liquid replenishment tank; When the first state ends and the second state begins, the second replenishment tank is connected to the replenishment port, and the coolant enters the second replenishment tank through the replenishment port. In the second state, the piston moves downward. After the piston moves downward to a certain position, the first replenishment tank is connected to the steam chamber, and the coolant in the first replenishment tank enters the steam chamber.

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