Pull-out heat dissipation device and robot

Abstract

The present application relates to a pull-out type heat dissipation device and a robot. The pull-out type heat dissipation device includes a rod body, a movable sleeve, a housing and a linkage valve. The housing is provided with a pull-out cavity, and the movable sleeve divides the pull-out cavity into a heat dissipation cavity and an exhaust cavity; the movable sleeve is provided with an inner cavity and a communication hole, and one end of the rod body is provided with a limiting portion and is in limit fit with both ends of the inner cavity; when the limiting portion abuts against one end of the inner cavity far from the power element, the communication hole is closed, and when the rod body drives the movable sleeve to move to expand the heat dissipation cavity, the liquid working medium in the heat dissipation cavity is phase-changed into a gaseous working medium; when the limiting portion abuts against one end of the inner cavity close to the power element, the communication hole is opened, and when the rod body drives the movable sleeve to move to contract the heat dissipation cavity, the gaseous working medium in the heat dissipation cavity sequentially enters the atmospheric environment through the communication hole and the exhaust cavity. The pull-out type heat dissipation device and the robot provided by the present application solve the problems that the heat dissipation solution of the coolant is easily restricted by the ambient temperature, resulting in low heat dissipation efficiency, difficult assembly and high noise.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation devices for components, and particularly to a pull-out heat dissipation device and a robot. Background Art

[0002] With the rapid development of modern sensing technologies, robot systems have achieved large-scale applications by integrating multi-dimensional sensing capabilities. In the electromechanical systems where robots perform complex actions, the power units composed of multi-degree-of-freedom joint structures and supporting drive motors pose strict requirements for energy supply. To meet the demands of continuous high-intensity operations, the power density characteristics of the energy storage systems (battery packs) and the core power conversion components (IGBT insulated gate bipolar transistor modules) of current robots have shown significant improvements. While this technological evolution provides stronger power for robots, it also makes thermal management a key bottleneck restricting system reliability.

[0003] The current mainstream liquid cooling heat dissipation solutions use coolant to directly or indirectly contact the heat-generating components (including but not limited to components such as motor stators, IGBT modules, and batteries), and dissipate the heat generated by the heat-generating components through the flow of the coolant. Moreover, the coolant usually needs to rely on an air condenser or a compressor to achieve its own cooling and recirculation.

[0004] However, when using an air condenser to dissipate heat from the coolant, if the ambient temperature is too high, the coolant cannot be cooled in time, which may lead to overheating and damage of the heat-generating components. When using a compressor for refrigeration, due to the large volume and weight of the compressor, its installation in the robot is relatively difficult, which may even affect the normal operation of the robot. In addition, the noise of the compressor is relatively large, which will affect the user experience of the robot. Summary of the Invention

[0005] Based on this, it is necessary to provide a pull-out heat dissipation device and a robot to solve the problems that the existing heat dissipation solutions for coolant are easily restricted by the ambient temperature, resulting in a decrease in heat dissipation efficiency, difficult assembly of the heat dissipation device, and relatively large noise of the heat dissipation device.

[0006] The pull-out type heat dissipation device provided by the present application includes a rod body, a movable sleeve, a housing, and a linkage valve. The housing is provided with a pull-out cavity. The movable sleeve is movably arranged in the pull-out cavity along a preset axis and divides the pull-out cavity into a heat dissipation cavity and an exhaust cavity. A liquid working medium is provided in the heat dissipation cavity, and the heat dissipation cavity is used to dissipate heat from the heating surface of the power element; the movable sleeve is provided with an inner cavity and a communication hole, and the communication hole can communicate the heat dissipation cavity and the exhaust cavity. One end of the rod body is provided with a limiting portion, and the other end of the rod body is movably arranged in the inner cavity through the limiting portion and is in limit cooperation with both ends of the inner cavity along the preset axis. The linkage valve is in movable cooperation with the limiting portion; when the limiting portion abuts against the end of the inner cavity far from the power element, the linkage valve closes the communication hole. When the limiting portion drives the movable sleeve to continue moving to expand the heat dissipation cavity, the liquid working medium in the heat dissipation cavity can be phase-changed into a gaseous working medium; when the limiting portion abuts against the end of the inner cavity close to the power element, the linkage valve opens the communication hole. When the limiting portion drives the movable sleeve to continue moving to contract the heat dissipation cavity, the gaseous working medium in the heat dissipation cavity can sequentially enter the atmospheric environment through the communication hole and the exhaust cavity.

[0007] In one embodiment, the linkage valve includes a valve plug and a lever mechanism. One end of the lever mechanism is connected to the valve plug, and the other end is in pressing cooperation with the limiting portion. When the rod body drives the limiting portion to move along the preset axis, the limiting portion can cause the lever mechanism to rotate around the fulcrum and drive the valve plug to open or close the communication hole.

[0008] In one embodiment, the lever mechanism includes a support rod, a connecting rod, and an elastic member. One end of the support rod is connected to the inner wall of the inner cavity, and the other end is hinged to the connecting rod to form the fulcrum of the lever mechanism. One end of the connecting rod is connected to the valve plug, and the other end is hinged to the elastic member. The elastic member is connected to the inner wall of the inner cavity; when the limiting portion compresses the elastic member, the elastic member can drive the connecting rod to rotate around the fulcrum and open the communication hole by the valve plug; when the limiting portion is separated from the elastic member, the elastic member can push the connecting rod to rotate around the fulcrum and close the communication hole by the valve plug.

[0009] In one embodiment, the pull-out type heat dissipation device further includes a liquid storage portion, and a liquid working medium is provided in the liquid storage portion and is communicated with the heat dissipation cavity.

[0010] In one embodiment, the pull-out type heat dissipation device further includes a liquid absorption core. One end of the liquid absorption core is arranged in the liquid storage portion, and the other end is arranged on the inner wall of the heat dissipation cavity, so that the liquid working medium can enter the heat dissipation cavity from the liquid storage portion through the liquid absorption core, and the liquid working medium in the heat dissipation cavity is adsorbed on the liquid absorption core.

[0011] In one embodiment, the liquid level height of the liquid working medium in the liquid storage portion is lower than the setting height of the liquid absorption core in the heat dissipation cavity.

[0012] In one embodiment, the connecting hole includes a first hole and a second hole. The first hole is arranged at one end of the movable sleeve close to the power element, and the first hole connects the inner cavity and the heat dissipation cavity. The second hole is arranged at one end of the movable sleeve away from the power element, and the second hole connects the inner cavity and the exhaust cavity. The limiting portion can enable the linkage valve to open or close one or both of the first hole and the second hole.

[0013] In one embodiment, the movable sleeve is arranged close to the bottom wall of the power element, the side wall of the housing and the heat-generating surface of the power element to form a heat-dissipating cavity.

[0014] In one embodiment, the bottom wall of the heat dissipation cavity at one end away from the exhaust cavity contacts the heat generating surface of the power component.

[0015] The present application also provides a robot, which includes the pull-out type heat dissipation device described in any one of the above embodiments.

[0016] Compared with the prior art, the core innovation of the pull-out heat dissipation device and robot provided by the present application is that the movable sleeve is driven to move back and forth in the pull-out cavity by the rod body, and the opening and closing control of the linkage valve is combined to realize the periodic gasification and discharge of the liquid working medium in the heat dissipation cavity, thereby achieving a continuous and effective heat dissipation effect. This design cleverly utilizes the efficient heat absorption characteristics of phase change materials, while solving the problem of directional discharge of gaseous working medium, avoiding the dependence on ambient temperature and the use of large refrigeration equipment in traditional liquid cooling solutions.

[0017] The key to this design is the coordinated work of the rod, the sleeve and the linkage valve. The reciprocating motion of the rod not only drives the sleeve to move, but also controls the opening and closing timing of the linkage valve through the limiter. The movement of the sleeve realizes the periodic change of the heat dissipation chamber volume, while the opening and closing of the linkage valve ensures the directional discharge of the gaseous working medium. This coordinated working mechanism ensures the continuity and efficiency of the heat dissipation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic cross-sectional view of a pull-out heat dissipation device according to an embodiment of the present application;

[0020] Figure 2 The local structural state of the pull-out heat dissipation device of an embodiment provided in this application Figure 1 ;

[0021] Figure 3 Partial structural state of the pull-out heat dissipation device according to an embodiment provided by the present application Figure 2 。

[0022] Reference numerals: 100, rod body; 110, limiting part; 111, mounting groove; 200, movable sleeve; 210, inner cavity; 220, communication hole; 221, first hole; 222, second hole; 230, first collar; 300, housing; 311, heat dissipation cavity; 312, exhaust cavity; 320, third hole; 330, second collar; 400, linkage valve; 410, valve plug; 421, support rod; 422, connecting rod; 423, elastic member; 500, liquid storage part; 510, water replenishing and exhaust hole; 600, liquid absorption core; 700, power element. Detailed implementation manners

[0023] With the rapid development of modern sensing technology, robot systems have achieved large-scale applications by integrating multi-dimensional sensing capabilities. In the electromechanical systems where robots perform complex actions, the power units composed of multi-degree-of-freedom joint structures and supporting drive motors pose strict requirements for energy supply. To meet the needs of continuous high-intensity operations, the energy storage systems (battery packs) and power conversion core components (IGBT insulated gate bipolar transistor modules) of current robots both exhibit significantly improved power density characteristics. While this technological evolution provides stronger power for robots, it also makes thermal management a key bottleneck restricting system reliability.

[0024] The current mainstream liquid cooling heat dissipation solutions use the coolant to directly or indirectly contact the heating elements (including but not limited to motor stators, IGBT modules, batteries and other components), and the heat generated by the heating elements is taken away by the flow of the coolant. And usually, the coolant needs to rely on an air condenser or a compressor to achieve its own cooling and recirculation.

[0025] However, when using an air condenser to dissipate heat from the coolant, if the ambient temperature is too high, the coolant cannot be cooled in time, which may lead to overheating and damage of the heating elements. And when using a compressor for refrigeration, due to the large volume and weight of the compressor, its installation in the robot is more difficult, which may even affect the normal operation of the robot. Moreover, the noise of the compressor is relatively large, which will affect the use experience of the robot.

[0026] Therefore, in order to solve the problems that the existing heat dissipation solutions for the coolant are easily restricted by the ambient temperature, resulting in a decrease in heat dissipation efficiency, difficult assembly of the heat dissipation device, and relatively large noise of the heat dissipation device, the present application provides a pull-out heat dissipation device and a robot.

[0027] Please refer to Figures 1 - 3, the pull-out type heat dissipation device includes a rod body 100, a movable sleeve 200, a housing 300 and a linkage valve 400. The housing 300 is provided with a pull-out cavity. The movable sleeve 200 is movably arranged in the pull-out cavity along a preset axial direction and divides the pull-out cavity into a heat dissipation cavity 311 and an exhaust cavity 312. The exhaust cavity 312 communicates with the atmospheric environment.

[0028] Among them, the rod body 100 refers to a component used to drive the movement of the movable sleeve 200, and can be specifically implemented by a metal rod or a plastic rod.

[0029] Among them, the movable sleeve 200 refers to a sleeve structure that can move along a preset axial direction in the pull-out cavity, and can be specifically implemented by a hollow cylinder made of metal or plastic materials.

[0030] Among them, the housing 300 refers to an external structure used to accommodate the movable sleeve 200 and form the pull-out cavity, and can be specifically implemented by a housing made of metal or plastic materials.

[0031] Among them, the linkage valve 400 refers to a valve mechanism used to control the opening and closing of the communication hole 220, and can be specifically implemented by a combination of a valve plug 410 and a lever mechanism.

[0032] Specifically, in one embodiment, as Figure 1 shown, the housing 300 is provided with a third hole 320, and the exhaust cavity 312 communicates with the atmospheric environment through the third hole 320.

[0033] A liquid working medium is provided in the heat dissipation cavity 311. The heat dissipation cavity 311 contacts the heating surface of the power element 700 to dissipate heat from the power element 700.

[0034] In one embodiment, as Figure 1 shown, the bottom wall of the movable sleeve 200 close to the power element 700, the side wall of the housing 300 and the heating surface of the power element 700 enclose to form the heat dissipation cavity 311.

[0035] With such a setting, these three parts jointly enclose to form a closed heat dissipation cavity 311, enabling the liquid working medium to directly contact the heating surface of the power element 700, greatly improving the heat dissipation efficiency of the power element 700.

[0036] In another embodiment, the bottom wall of the heat dissipation cavity 311 at the end far from the exhaust cavity 312 contacts the heating surface of the power element 700.

[0037] Since the contact area between the bottom wall of the heat dissipation cavity 311 at the end far from the exhaust cavity 312 and the heating surface of the power element 700 is constant, thus, with such a setting, the heat transfer efficiency between the power element 700 and the heat dissipation cavity 311 can be improved.

[0038] Moreover, this design can ensure direct thermal contact between the heat dissipation cavity 311 and the power element 700, thereby improving the heat transfer efficiency. Specifically, the bottom wall of the heat dissipation cavity 311 can be made of a high thermal conductivity material such as copper, aluminum, or other metal alloys. The surface of the bottom wall can be specially treated, such as polishing or applying a thermal paste, to further enhance the thermal contact with the heating surface of the power element 700.

[0039] However, it is not limited to this. In other embodiments, it can also be that the side wall of the heat dissipation cavity 311 contacts the heating surface of the power element 700.

[0040] Furthermore, as Figure 1 shown, the movable sleeve 200 is provided with an inner cavity 210 and a communication hole 220. The communication hole 220 communicates the heat dissipation cavity 311 and the exhaust cavity 312. One end of the rod body 100 is provided with a limiting portion 110. One end of the rod body 100 is movably arranged in the inner cavity 210 through the limiting portion 110 and is in limiting cooperation with both ends of the inner cavity 210 along a preset axial direction.

[0041] Specifically, the limiting portion 110 protrudes radially from the outer peripheral side of the rod body 100 along the rod body 100. The limiting portion 110 can be a circular protruding structure on the outer periphery of the rod body 100, and the limiting portion 110 and the rod body 100 are integrally formed. The limiting portion 110 can also be welded to the outer periphery of the rod body 100.

[0042] Moreover, the end of the rod body 100 away from the limiting portion 110 sequentially passes through the inner cavity 210 and the exhaust cavity 312 and extends out of the housing 300. The linkage valve 400 is movably matched with the limiting portion 110.

[0043] Specifically, as Figure 1 shown, the movable sleeve 200 is provided with a first collar 230, and the housing 300 is provided with a second collar 330. The end of the rod body 100 away from the limiting portion 110 sequentially passes through the first collar 230 and the second collar 330 movably, so that the movement of the rod body 100 is more stable.

[0044] Moreover, the number of the communication holes 220 can be multiple. The multiple communication holes 220 are distributed in an array around the axial direction of the movable sleeve 200. Correspondingly, the number of the linkage valves 400 is the same as the number of the communication holes 220, and the two are arranged in one-to-one correspondence.

[0045] When the limiting portion 110 abuts against the end of the inner cavity 210 away from the power element 700, the linkage valve 400 closes the communication hole 220. At this time, the rod body 100, the movable sleeve 200, and the linkage valve 400 form a piston structure, so that the heat dissipation cavity 311 is hermetically arranged. Moreover, when the limiting portion 110 drives the movable sleeve 200 to move further away from the power element 700 to expand the heat dissipation cavity 311, the liquid working medium in the heat dissipation cavity 311 can be phase-changed into a gaseous working medium;

[0046] When the limiting part 110 abuts against one end of the inner cavity 210 close to the power element 700, the linkage valve 400 opens the communication hole 220. At this time, the movable sleeve 200 is a structure that penetrates along the preset axial direction. Moreover, when the limiting part 110 drives the movable sleeve 200 to continue moving towards the direction close to the power element 700 so that the heat dissipation cavity 311 shrinks, the gaseous working medium in the heat dissipation cavity 311 can sequentially pass through the communication hole 220 and the exhaust cavity 312 and enter the atmospheric environment.

[0047] It should be noted that a groove structure is provided on the outer circle of the bottom of the movable sleeve 200 to adapt to the stepped structure at the bottom of the heat dissipation cavity 311, so as to facilitate the complete fit of the movable sleeve 200 and the bottom wall of the heat dissipation cavity 311.

[0048] Specifically, the working principle of the pull-out type heat dissipation device is as follows: when the rod body 100 drives the movable sleeve 200 to move outwards, the limiting part 110 abuts against one end of the inner cavity 210 away from the power element 700, and at this time the linkage valve 400 closes the communication hole 220. As the movable sleeve 200 continues to move outwards, the heat dissipation cavity 311 expands, and the liquid working medium in the heat dissipation cavity 311 absorbs heat and vaporizes. When the rod body 100 drives the movable sleeve 200 to move inwards, the limiting part 110 abuts against one end of the inner cavity 210 close to the power element 700, and at this time the linkage valve 400 opens the communication hole 220. As the movable sleeve 200 continues to move inwards, the heat dissipation cavity 311 shrinks, the gaseous working medium is squeezed, and sequentially passes through the communication hole 220 and the exhaust cavity 312 and is discharged into the atmospheric environment.

[0049] The core innovation point of this application is that by driving the movable sleeve 200 to reciprocate in the pull-out cavity through the rod body 100 and combining the opening and closing control of the linkage valve 400, the periodic vaporization and discharge of the liquid working medium in the heat dissipation cavity 311 are realized, so as to achieve a continuous and effective heat dissipation effect. This design cleverly utilizes the high-efficiency heat absorption characteristics of the phase change material, and at the same time solves the problem of the directional discharge of the gaseous working medium, avoiding the dependence on the ambient temperature and the use of large refrigeration equipment in the traditional liquid cooling heat dissipation scheme.

[0050] The key to this design lies in the coordinated operation of the rod body 100, the movable sleeve 200 and the linkage valve 400. The reciprocating motion of the rod body 100 not only drives the movement of the movable sleeve 200, but also controls the opening and closing timing of the linkage valve 400 through the limiting part 110. The movement of the movable sleeve 200 realizes the periodic change of the volume of the heat dissipation cavity 311, and the opening and closing of the linkage valve 400 ensures the directional discharge of the gaseous working medium. This coordinated working mechanism ensures the continuity and efficiency of the heat dissipation process.

[0051] In one embodiment, as Figure 1As shown, the communication holes 220 include a first hole 221 and a second hole 222. The first hole 221 is provided at one end of the movable sleeve 200 close to the power element 700, and the first hole 221 communicates with the inner cavity 210 and the heat dissipation cavity 311. The second hole 222 is provided at the end of the movable sleeve 200 away from the power element 700, and the second hole 222 communicates with the inner cavity 210 and the exhaust cavity 312. The limiting portion 110 can open or close one or both of the first hole 221 and the second hole 222 by the linkage valve 400.

[0052] It should be noted that the distance between the side wall where the first hole 221 is located and the side wall where the second hole 222 is located is the stroke of the limiting portion 110 along the preset axial direction in the inner cavity 210.

[0053] With such a setting, by respectively providing the first hole 221 and the second hole 222 at both ends of the movable sleeve 200, and enabling the limiting portion 110 to control the opening and closing of these two holes by the linkage valve 400, the control flexibility of the communication holes 220 is improved. The first hole 221 is mainly used for the communication between the heat dissipation cavity 311 and the inner cavity 210, while the second hole 222 is mainly used for the communication between the inner cavity 210 and the exhaust cavity 312. This separated design enables the gas flow between the heat dissipation cavity 311, the inner cavity 210 and the exhaust cavity 312 to be more precisely controlled.

[0054] For example, during the expansion stage of the heat dissipation cavity 311, the first hole 221 and the second hole 222 can be closed to ensure that the liquid working medium in the heat dissipation cavity 311 can fully absorb heat and phase change into a gas state. During the contraction stage of the heat dissipation cavity 311, the first hole 221 can be opened first to allow the gaseous working medium to enter the inner cavity 210, and then the second hole 222 can be opened to allow the gaseous working medium to be discharged from the inner cavity 210 into the exhaust cavity 312. This step-by-step operation can better control the gas flow and improve the heat dissipation efficiency.

[0055] Furthermore, this design can also flexibly adjust the opening and closing sequence and timing according to actual needs. For example, in some cases, the first hole 221 and the second hole 222 can be opened simultaneously to achieve faster gas discharge. Or, only one of the holes can be opened to achieve partial gas exchange. This flexibility enables the heat dissipation device to better adapt to different working conditions and heat dissipation requirements.

[0056] As a preferred embodiment, the first hole 221 can be designed as a plurality of small holes, evenly distributed on the end face of the movable sleeve 200 close to the power element 700. This design can enable the gaseous working medium in the heat dissipation cavity 311 to enter the inner cavity 210 more evenly. The second hole 222 can be designed as a larger hole, located at the center of the end face of the movable sleeve 200 away from the power element 700, so as to facilitate the rapid discharge of gas.

[0057] Specifically, when the limiting part 110 abuts against one end of the inner cavity 210 away from the power element 700, the rod body 100 can drive the linkage valve 400 to close one or both of the first hole 221 and the second hole 222;

[0058] When the limiting part 110 abuts against one end of the inner cavity 210 close to the power element 700, the rod body 100 can drive the linkage valve 400 to open one or both of the first hole 221 and the second hole 222. Moreover, when the rod body 100 drives the movable sleeve 200 to compress the heat dissipation cavity 311, the gaseous working medium can sequentially enter the atmospheric environment through the first hole 221, the inner cavity 210, the second hole 222, and the exhaust cavity 312.

[0059] However, it is not limited thereto. In other embodiments, the communication hole 220 may also be a through hole that does not communicate with the inner cavity 210 and is separately provided through the movable sleeve 200.

[0060] In one embodiment, as Figures 1 - 3 shown, the linkage valve 400 includes a valve plug 410 and a lever mechanism. One end of the lever mechanism is connected to the valve plug 410, and the other end of the lever mechanism is in press-fit with the limiting part 110. When the rod body 100 drives the limiting part 110 to move along the preset axial direction, the limiting part 110 can make the lever mechanism rotate and drive the valve plug 410 to open or close the communication hole 220.

[0061] With such a setting, by introducing the lever mechanism, precise control of the linkage valve 400 is achieved. As a simple and effective mechanical structure, the lever mechanism can convert the linear motion of the rod body 100 into the opening and closing actions of the valve plug 410, thereby improving the control accuracy and reliability of the linkage valve 400.

[0062] Specifically, one end of the lever mechanism is connected to the valve plug 410, and the other end is connected to the limiting part 110. When the rod body 100 moves, the limiting part 110 moves accordingly, and then drives the lever mechanism to rotate around the fulcrum. This rotational motion is transmitted to the valve plug 410, enabling it to precisely open or close the communication hole 220. This mechanical linkage method is not only simple in structure but also reliable in operation, effectively avoiding possible failures or delays in the electronic control system.

[0063] Furthermore, the design of the lever mechanism can be adjusted according to actual needs. For example, the force transmission and displacement amplification effect can be adjusted by changing the length ratio of the lever arms, thereby achieving more precise control. At the same time, the fulcrum position of the lever mechanism can also be optimized according to the spatial layout and mechanical requirements to ensure the stability and sensitivity of the entire mechanism.

[0064] Thus, by adopting a lever mechanism to control the opening and closing of the linkage valve 400, the present application not only simplifies the structure but also improves the control accuracy. Compared with an electronic control system, this mechanical control method has higher reliability and lower failure rate. Especially in harsh environments or during long-term use, the mechanical control can maintain stable performance and is not easily affected by external factors.

[0065] However, not limited thereto, in other embodiments, the limiting portion 110 can also directly drive the valve plug 410 to move along a preset axial direction.

[0066] Further, in one embodiment, as Figures 1 - 3 shown, the lever mechanism includes a support rod 421, a connecting rod 422, and an elastic member 423. One end of the support rod 421 is connected to the inner wall of the inner cavity 210, and the other end is hinged to the connecting rod 422 to form a fulcrum of the lever mechanism. One end of the connecting rod 422 is connected to the valve plug 410, and the other end is hinged to the elastic member 423. The elastic member 423 is connected to the inner wall of the inner cavity 210.

[0067] When the limiting portion 110 compresses the elastic member 423, the elastic member 423 can drive the connecting rod 422 to rotate and open the communication hole 220 by the valve plug 410. When the limiting portion 110 is separated from the elastic member 423, the elastic member 423 can push the connecting rod 422 to rotate and close the communication hole 220 by the valve plug 410.

[0068] With such a setting, the linkage valve 400 can automatically control the opening and closing state of the communication hole 220 according to the position of the rod body 100. When the rod body 100 drives the limiting portion 110 to move to a position where the elastic member 423 is compressed, the elastic member 423 is compressed, thereby driving the connecting rod 422 to rotate around the fulcrum and opening the communication hole 220 by the valve plug 410. In this way, when the heat dissipation cavity 311 expands, gaseous working medium can enter the exhaust cavity 312 through the communication hole 220. On the contrary, when the rod body 100 drives the limiting portion 110 away from the elastic member 423, the elastic member 423 will push the connecting rod 422 to rotate in the reverse direction, closing the communication hole 220 by the valve plug 410, thereby preventing external air from entering the heat dissipation cavity 311 when the heat dissipation cavity 311 contracts.

[0069] Through this design, the pull-out type heat dissipation device of the present application can realize automatic control of the opening and closing of the communication hole 220, without an additional control mechanism, with a simple structure and high reliability. At the same time, this design can also ensure that the working medium in the heat dissipation cavity 311 undergoes a phase change and is discharged at an appropriate time, thereby improving the heat dissipation efficiency.

[0070] Specifically, in one embodiment, as Figures 1 - 3 shown, an installation groove 111 is provided at one end of the limiting portion 110 facing the first hole 221, and the elastic member 423 is arranged in the installation groove 111.

[0071] Such a setting is beneficial to reducing the assembly volume of the entire lever mechanism.

[0072] Furthermore, in one embodiment, the elastic member 423 is a compression spring.

[0073] However, it is not limited to this. In other embodiments, the elastic member 423 can also be a metal shrapnel structure.

[0074] In one embodiment, the drawable heat dissipation device further includes a liquid storage part 500. The liquid storage part 500 is provided with a liquid working medium and is communicated with the heat dissipation cavity 311.

[0075] Such a setting solves the problem of insufficient liquid working medium by adding the liquid storage part 500, thereby improving the heat dissipation efficiency. The liquid storage part 500 serves as an additional storage space for the liquid working medium and can timely supplement the liquid working medium in the heat dissipation cavity 311 when it is insufficient, ensuring the continuous progress of the heat dissipation process.

[0076] Specifically, the liquid storage part 500 can be arranged at an appropriate position of the housing 300. For example, it can be located on one side or at the bottom of the heat dissipation cavity 311. A communication channel is provided between the liquid storage part 500 and the heat dissipation cavity 311, enabling the liquid working medium to flow freely. When the liquid working medium in the heat dissipation cavity 311 decreases due to evaporation, the liquid working medium in the liquid storage part 500 can automatically supplement into the heat dissipation cavity 311 through the communication channel, maintaining an adequate amount of liquid working medium in the heat dissipation cavity 311.

[0077] Specifically, in one embodiment, a water replenishing and exhaust hole 510 is provided at the top of the liquid storage part 500 to facilitate the replenishment of the liquid working medium in the liquid storage part 500 and the discharge of the internal gas.

[0078] Further, in one embodiment, as Figure 1 shown, the drawable heat dissipation device further includes a liquid absorption core 600. One end of the liquid absorption core 600 is arranged in the liquid storage part 500, and the other end is arranged on the inner wall of the heat dissipation cavity 311, so that the liquid working medium can enter the heat dissipation cavity 311 from the liquid storage part 500 through the liquid absorption core 600, and the liquid working medium in the heat dissipation cavity 311 is adsorbed on the liquid absorption core 600.

[0079] By arranging the liquid absorption core 600 between the liquid storage part 500 and the heat dissipation cavity 311, the liquid working medium is transported from the liquid storage part 500 to the heat dissipation cavity 311 by capillary action, and the liquid working medium in the heat dissipation cavity 311 is adsorbed on the liquid absorption core 600. This design can effectively solve the problem that the liquid working medium cannot smoothly enter the heat dissipation cavity 311, and at the same time ensure the uniform distribution of the liquid working medium in the heat dissipation cavity 311.

[0080] Specifically, the wick 600 can be made of a variety of materials and in various structural forms. For example, the wick 600 can be made of porous materials such as fibers, metal meshes, or sintered powders. These materials have good capillary action and can effectively absorb and transport the liquid working medium. One end of the wick 600 can be fixed inside the liquid storage part 500 by means such as embedding, bonding, or pressing, and the other end can be attached to or embedded in the inner wall of the heat dissipation cavity 311.

[0081] However, it is not limited to this. In other embodiments, the liquid working medium in the liquid storage part 500 can also enter the heat dissipation cavity 311 through a control valve.

[0082] Furthermore, in one embodiment, the liquid level height of the liquid working medium in the liquid storage part 500 is lower than the set height of the wick 600 in the heat dissipation cavity 311. And the wick 600 is attached to the heat generating surface of the power element 700.

[0083] The liquid level height of the liquid working medium in the liquid storage part 500 is lower than the set height of the wick 600 in the heat dissipation cavity 311. This design can effectively prevent the excessive accumulation of the liquid working medium in the heat dissipation cavity 311, thereby ensuring that there is enough space in the heat dissipation cavity 311 for gas-liquid phase change. At the same time, due to the capillary action of the wick 600, the liquid working medium can still be transported from the liquid storage part 500 to the heat dissipation cavity 311, ensuring that there is always enough liquid working medium in the heat dissipation cavity 311 for phase change heat dissipation.

[0084] This application also provides a robot, which includes the pull-out heat dissipation device described in any one of the above embodiments.

[0085] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0086] The above-described embodiments only represent several implementation manners of this application. Their descriptions are relatively specific and detailed, but they should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application should be based on the appended claims.

[0087] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0088] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0089] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0090] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0091] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

Claims

1. A pull-out heat dissipation device, characterized in that, It includes a rod body (100), a movable sleeve (200), a housing (300) and a linkage valve (400). The housing (300) is provided with a pulling cavity. The movable sleeve (200) is movably arranged in the pulling cavity along a preset axis, and divides the pulling cavity into a heat dissipation cavity (311) and an exhaust cavity (312). The heat dissipation cavity (311) is filled with a liquid working medium, and the heat dissipation cavity (311) is used to dissipate heat from the heating surface of a power element (700). The movable sleeve (200) is provided with an inner cavity (210) and a communication hole (220). The communication hole (220) can communicate the heat dissipation cavity (311) and the exhaust cavity (312). One end of the rod body (100) is provided with a limiting part (110). The other end of the rod body (100) is movably arranged in the inner cavity (210) through the limiting part (110) and is in limit fit with the two ends of the inner cavity (210) along the preset axis. The linkage valve (400) is in movable cooperation with the limiting part (110). When the limiting part (110) abuts against the end of the inner cavity (210) far from the power element (700), the linkage valve (400) closes the communication hole (220). When the limiting part (110) drives the movable sleeve (200) to continue moving so that the heat dissipation cavity (311) expands, the liquid working medium in the heat dissipation cavity (311) can be phase-changed into a gaseous working medium. When the limiting part (110) abuts against the end of the inner cavity (210) close to the power element (700), the linkage valve (400) opens the communication hole (220). When the limiting part (110) drives the movable sleeve (200) to continue moving so that the heat dissipation cavity (311) contracts, the gaseous working medium in the heat dissipation cavity (311) can enter the atmospheric environment through the communication hole (220) and the exhaust cavity (312) in sequence.

2. The pull-out heat dissipation device according to claim 1, wherein The linkage valve (400) includes a valve plug (410) and a lever mechanism. One end of the lever mechanism is connected to the valve plug (410), and the other end is in pressing fit with the limiting part (110). When the rod body (100) drives the limiting part (110) to move along the preset axis, the limiting part (110) can make the lever mechanism rotate around a fulcrum and drive the valve plug (410) to open or close the communication hole (220).

3. The pull-out heat dissipation device according to claim 2, characterized in that, The lever mechanism includes a support rod (421), a connecting rod (422) and an elastic member (423). One end of the support rod (421) is connected to the inner wall of the inner cavity (210), and the other end is hinged to the connecting rod (422) to form the fulcrum of the lever mechanism. One end of the connecting rod (422) is connected to the valve plug (410), and the other end is hinged to the elastic member (423). The elastic member (423) is connected to the inner wall of the inner cavity (210). When the limiting part (110) compresses the elastic member (423), the elastic member (423) can drive the connecting rod (422) to rotate around the fulcrum and cause the valve plug (410) to open the communication hole (220). When the limiting part (110) is separated from the elastic member (423), the elastic member (423) can push the connecting rod (422) to rotate around the fulcrum and cause the valve plug (410) to close the communication hole (220).

4. The pull-out heat dissipation device according to claim 1, wherein It further includes a liquid storage part (500), and a liquid working medium is provided in the liquid storage part (500) and is communicated with the heat dissipation cavity (311).

5. The pull-out heat dissipation device according to claim 4, characterized in that, It further includes a liquid absorption core (600). One end of the liquid absorption core (600) is arranged in the liquid storage part (500), and the other end is arranged on the inner wall of the heat dissipation cavity (311), so that the liquid working medium can enter the heat dissipation cavity (311) from the liquid storage part (500) through the liquid absorption core (600), and the liquid working medium in the heat dissipation cavity (311) is adsorbed on the liquid absorption core (600).

6. The pull-out heat dissipation device according to claim 5, wherein, The liquid level height of the liquid working medium in the liquid storage part (500) is lower than the setting height of the liquid absorption core (600) in the heat dissipation cavity (311).

7. The pull-out heat dissipation device according to claim 1, wherein, The communication hole (220) includes a first hole (221) and a second hole (222). The first hole (221) is arranged at one end of the movable sleeve (200) close to the power element (700). The first hole (221) communicates the inner cavity (210) and the heat dissipation cavity (311). The second hole (222) is arranged at the end of the movable sleeve (200) far from the power element (700). The second hole (222) communicates the inner cavity (210) and the exhaust cavity (312). The limiting part (110) can cause the linkage valve (400) to open or close one or both of the first hole (221) and the second hole (222).

8. The pull-out heat dissipation device according to claim 1, wherein, The bottom wall of the movable sleeve (200) close to the power element (700), the side wall of the housing (300) and the heat generating surface of the power element (700) enclose to form the heat dissipation cavity (311).

9. The pull-out heat dissipation device according to claim 1, wherein, The bottom wall of the heat dissipation cavity (311) at the end far from the exhaust cavity (312) contacts the heat generating surface of the power element (700).

10. A robot, characterized in that, It includes the pull-out type heat dissipation device according to any one of claims 1-9.

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