Drawing type heat dissipation device and robot

Abstract

The invention relates to a drawing type heat dissipation device and a robot, the drawing type heat dissipation device comprises a rod body, a movable sleeve, a shell and a linkage valve, the shell is provided with a drawing cavity, and the movable sleeve divides the drawing cavity into a heat dissipation cavity and an exhaust cavity; the movable sleeve is provided with an inner cavity and a communicating hole; one end of the rod body is provided with a limiting part and is in limiting fit with two ends of the inner cavity; when the limiting part abuts against the end, away from the power element, of the inner cavity, the communicating hole is closed, and when the rod body drives the movable sleeve to move to enable the heat dissipation cavity to expand, the liquid working medium in the heat dissipation cavity is changed into a gaseous working medium. When the limiting part abuts against the end, close to the power element, of the inner cavity, the communicating hole is opened, and when the rod body drives the movable sleeve to move so that the heat dissipation cavity can contract, the gaseous working medium in the heat dissipation cavity enters the atmospheric environment through the communicating hole and the exhaust cavity in sequence. According to the drawing type heat dissipation device and the robot, the problems that the heat dissipation efficiency is low, assembly is difficult and noise is large due to the fact that the heat dissipation scheme of cooling liquid is easily limited by the environment temperature are solved.

Description

Technical Field

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

[0002] With the rapid development of modern sensing technology, robot systems have achieved large-scale applications by integrating multi-dimensional sensing capabilities. In the electromechanical system of robots that perform complex actions, the power unit composed of multi-degree-of-freedom joint structures and supporting drive motors places strict requirements on energy supply. In order to meet the needs of continuous high-intensity operations, the current robot's energy storage system (battery pack) and power conversion core components (IGBT insulated gate bipolar transistor modules) have shown significantly improved power density characteristics. While this technological evolution provides robots with more powerful power, it also makes thermal management a key bottleneck restricting system reliability.

[0003] The current mainstream liquid cooling solution uses coolant to directly or indirectly contact the heating components (including but not limited to motor stators, IGBT modules, batteries and other components), and removes the heat generated by the heating components through the flow of coolant. In addition, the coolant usually needs to use an air condenser or compressor to achieve its own cooling and recirculation.

[0004] However, when an air condenser is used to dissipate heat from the coolant, the ambient temperature is too high and the coolant cannot dissipate heat in time, which may cause the heating element to overheat and be damaged. When a compressor is used for cooling, the compressor is too large and heavy, making it difficult to install in the robot, and even affecting the normal operation of the robot. In addition, the noise from the compressor is loud, 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 coolant heat dissipation solution is easily restricted by the ambient temperature, resulting in reduced heat dissipation efficiency, difficulty in assembling the heat dissipation device, and high noise of the heat dissipation device.

[0006] The pull-out heat dissipation device provided in the present application includes a rod body, a movable sleeve, a shell and a linkage valve. The shell is provided with a pull-out cavity. The movable sleeve is movably arranged in the pull-out cavity along a preset axial direction, and divides the pull-out cavity into a heat dissipation cavity and an exhaust cavity. A liquid working medium is arranged 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 connecting hole. The connecting hole can connect the heat dissipation cavity and the exhaust cavity. A limiting portion is provided at one end of the rod body. The other end of the rod body is movably arranged in the inner cavity through the limiting portion and is limitedly matched with both ends of the inner cavity along the preset axial direction. The linkage valve and the limiting portion are movably matched. When the limiting portion abuts against the end of the inner cavity away from the power element, the linkage valve closes the connecting hole. When the limiting portion drives the movable sleeve to continue to move 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 connecting hole. When the limiting portion drives the movable sleeve to continue to move to shrink the heat dissipation cavity, the gaseous working medium in the heat dissipation cavity can enter the atmospheric environment through the connecting hole and the exhaust cavity in sequence.

[0007] In one of the embodiments, 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 crimped with a limit portion. When the rod body drives the limit portion to move along a preset axial direction, the limit portion can cause the lever mechanism to rotate around the fulcrum and drive the valve plug to open or close the connecting 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 a 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, and 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 cause the valve plug to open the connecting hole; when the limiting portion and the elastic member are separated, the elastic member can push the connecting rod to rotate around the fulcrum and cause the valve plug to close the connecting hole.

[0009] In one of the embodiments, the pull-out type heat dissipation device further includes a liquid storage portion, in which a liquid working medium is provided and the liquid storage portion is connected to the heat dissipation cavity.

[0010] In one of the embodiments, the pull-out type heat dissipation device also includes a liquid absorption core, one end of which is arranged on the liquid storage part, 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 part 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 of the embodiments, the liquid level of the liquid 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; Figure 2 The local structural state of the pull-out heat dissipation device of an embodiment provided in this application Figure 1 ; Figure 3The local structural state of the pull-out heat dissipation device of an embodiment provided in this application Figure 2 .

[0020] : Reference numerals: 100, rod body; 110, limiting portion; 111, mounting groove; 200, movable sleeve; 210, inner cavity; 220, connecting hole; 221, first hole; 222, second hole; 230, first ring; 300, shell; 311, heat dissipation cavity; 312, exhaust cavity; 320, third hole; 330, second ring; 400, linkage valve; 410, valve plug; 421, support rod; 422, connecting rod; 423, elastic member; 500, liquid storage portion; 510, water replenishment exhaust hole; 600, liquid absorption core; 700, power element. DETAILED DESCRIPTION

[0021] With the rapid development of modern sensing technology, robot systems have achieved large-scale applications by integrating multi-dimensional sensing capabilities. In the electromechanical system of robots that perform complex actions, the power unit composed of multi-degree-of-freedom joint structures and supporting drive motors places strict requirements on energy supply. In order to meet the needs of continuous high-intensity operations, the current robot's energy storage system (battery pack) and power conversion core components (IGBT insulated gate bipolar transistor modules) have shown significantly improved power density characteristics. While this technological evolution provides robots with more powerful power, it also makes thermal management a key bottleneck restricting system reliability.

[0022] The current mainstream liquid cooling solution uses coolant to directly or indirectly contact the heating components (including but not limited to motor stators, IGBT modules, batteries and other components), and removes the heat generated by the heating components through the flow of coolant. In addition, the coolant usually needs to use an air condenser or compressor to achieve its own cooling and recirculation.

[0023] However, when an air condenser is used to dissipate heat from the coolant, the ambient temperature is too high and the coolant cannot dissipate heat in time, which may cause the heating element to overheat and be damaged. When a compressor is used for cooling, the compressor is too large and heavy, making it difficult to install in the robot, and even affecting the normal operation of the robot. In addition, the noise from the compressor is loud, which will affect the user experience of the robot.

[0024] Therefore, in order to solve the problems that the existing cooling solution of coolant is easily restricted by the ambient temperature, resulting in reduced cooling efficiency, difficult assembly of the cooling device and high noise of the cooling device, the present application provides a pull-out cooling device and a robot.

[0025] See also Figure 1-Figure 3The pull-out type heat dissipation device includes a rod body 100, a movable sleeve 200, a shell 300 and a linkage valve 400. The shell 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 is connected to the atmospheric environment.

[0026] The rod body 100 refers to a component used to drive the movable sleeve 200 to move, and can be implemented by a metal rod or a plastic rod.

[0027] 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 material.

[0028] The housing 300 refers to an external structure for accommodating the movable sleeve 200 and forming a pull-out cavity, and can be implemented by a housing made of metal or plastic material.

[0029] The linkage valve 400 refers to a valve mechanism for controlling the opening and closing of the connecting hole 220 , and can be specifically implemented by a combination of a valve plug 410 and a lever mechanism.

[0030] Specifically, in one embodiment, if Figure 1 As shown, the shell 300 is provided with a third hole 320 , and the exhaust cavity 312 is connected to the atmosphere through the third hole 320 .

[0031] Liquid working medium is arranged in the heat dissipation cavity 311 , and the heat dissipation cavity 311 contacts the heating surface of the power element 700 to dissipate heat from the power element 700 .

[0032] In one embodiment, if Figure 1 As shown, the movable sleeve 200 is arranged close to the bottom wall of the power element 700 , the side wall of the housing 300 and the heat-generating surface of the power element 700 to form a heat-dissipating cavity 311 .

[0033] In this way, the three parts are together arranged to form a closed heat dissipation cavity 311 , so that the liquid working medium can directly contact the heating surface of the power element 700 , thereby greatly improving the heat dissipation efficiency of the power element 700 .

[0034] In another embodiment, the bottom wall of the heat dissipation cavity 311 at one end away from the exhaust cavity 312 contacts the heat generating surface of the power component 700 .

[0035] Since the contact area between the bottom wall of the heat dissipation cavity 311 away from the exhaust cavity 312 and the heating surface of the power element 700 is constant, such an arrangement can improve the heat transfer efficiency between the power element 700 and the heat dissipation cavity 311 .

[0036] Moreover, this design can ensure direct thermal contact between the heat dissipation cavity 311 and the power component 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 coating with thermal conductive paste, to further enhance the thermal contact with the heat generating surface of the power component 700.

[0037] But it is not limited thereto, in other embodiments, the side wall of the heat dissipation cavity 311 may contact the heat generating surface of the power component 700 .

[0038] Furthermore, if Figure 1 As shown, the movable sleeve 200 is provided with an inner cavity 210 and a connecting hole 220, the connecting hole 220 connects the heat dissipation cavity 311 and the exhaust cavity 312, and one end of the rod body 100 is provided with a limiting portion 110. One end of the rod body 100 can be movably arranged in the inner cavity 210 through the limiting portion 110 and is limitedly matched with both ends of the inner cavity 210 along a preset axial direction.

[0039] Specifically, the limiting portion 110 protrudes from the outer peripheral side of the rod body 100 along the radial direction of the rod body 100. The limiting portion 110 can be a circle of raised 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.

[0040] In addition, one end of the rod body 100 away from the limiting portion 110 is sequentially inserted into the inner cavity 210 and the exhaust cavity 312 and extends out of the housing 300, and the linkage valve 400 and the limiting portion 110 are movably matched.

[0041] Specifically, Figure 1 As shown, the movable sleeve 200 is provided with a first ring 230, the housing 300 is provided with a second ring 330, and the end of the rod body 100 away from the limiting portion 110 is movably inserted into the first ring 230 and the second ring 330 in sequence to make the movement of the rod body 100 more stable.

[0042] Furthermore, there may be multiple communicating holes 220 , which 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 communicating holes 220 , and the two are arranged in a one-to-one correspondence.

[0043] 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 connecting hole 220. At this time, the rod body 100, the movable sleeve 200 and the linkage valve 400 form a piston structure to close the heat dissipation cavity 311. Moreover, when the limiting portion 110 drives the movable sleeve 200 to continue to move in the direction 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. When the limiting portion 110 abuts against one end of the inner cavity 210 close to the power element 700, the linkage valve 400 opens the connecting hole 220. At this time, the movable sleeve 200 is a structure that penetrates along a preset axial direction, and when the limiting portion 110 drives the movable sleeve 200 to continue to move in a direction close to the power element 700 to shrink the heat dissipation cavity 311, the gaseous working medium in the heat dissipation cavity 311 can enter the atmospheric environment through the connecting hole 220 and the exhaust cavity 312 in turn.

[0044] It should be noted that a circle of groove structure is provided on the outer circle of the bottom of the movable sleeve 200 to adapt to the step structure at the bottom of the heat dissipation cavity 311 so that the movable sleeve 200 can be completely fitted with the bottom wall of the heat dissipation cavity 311 .

[0045] Specifically, the working principle of the pull-out heat dissipation device is as follows: when the rod body 100 drives the movable sleeve 200 to move outward, the limiting portion 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 connecting hole 220. As the movable sleeve 200 continues to move outward, 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 inward, the limiting portion 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 connecting hole 220. As the movable sleeve 200 continues to move inward, the heat dissipation cavity 311 contracts, and the gaseous working medium is squeezed and discharged into the atmosphere through the connecting hole 220 and the exhaust cavity 312 in turn.

[0046] The core innovation of this application is that the rod body 100 drives the movable sleeve 200 to move back and forth in the drawer cavity, combined with the opening and closing control of the linkage valve 400, to achieve the periodic gasification and discharge of the liquid working medium in the heat dissipation cavity 311, 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.

[0047] The key to this design lies in the coordinated work 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 movable sleeve 200 to move, but also controls the opening and closing timing of the linkage valve 400 through the limiter 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 high efficiency of the heat dissipation process.

[0048] In one embodiment, if Figure 1As shown, the connecting 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, and the first hole 221 connects the inner cavity 210 and the heat dissipation cavity 311. The second hole 222 is arranged at one end of the movable sleeve 200 away from the power element 700, and the second hole 222 connects the inner cavity 210 and the exhaust cavity 312. The limiting portion 110 enables the linkage valve 400 to open or close one or both of the first hole 221 and the second hole 222.

[0049] 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 in the inner cavity 210 along the preset axial direction.

[0050] In this way, by respectively setting the first hole 221 and the second hole 222 at both ends of the movable sleeve 200, and enabling the limiter 110 to control the opening and closing of the two holes by the linkage valve 400, the control flexibility of the connecting hole 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 separation design allows the gas flow between the heat dissipation cavity 311, the inner cavity 210 and the exhaust cavity 312 to be more accurately controlled.

[0051] For example, in 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 change into a gaseous state. In 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.

[0052] 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 at the same time to achieve faster gas discharge. Alternatively, only one of the holes can be opened to achieve partial gas exchange. This flexibility allows the heat dissipation device to better adapt to different working conditions and heat dissipation requirements.

[0053] As a preferred embodiment, the first hole 221 can be designed as a plurality of small holes, evenly distributed on the end surface of the movable sleeve 200 close to the power element 700. This design can make the gaseous working medium in the heat dissipation cavity 311 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 surface of the movable sleeve 200 away from the power element 700, so as to facilitate the rapid discharge of gas.

[0054] Specifically, when the limiting portion 110 abuts against the 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; When the limiting portion 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, and when the rod body 100 drives the movable sleeve 200 to compress the heat dissipation cavity 311, the gaseous working medium can enter the atmospheric environment through the first hole 221, the inner cavity 210, the second hole 222 and the exhaust cavity 312 in sequence.

[0055] However, the present invention is not limited thereto. In other embodiments, the communicating hole 220 may be a through hole that is not connected to the inner cavity 210 and is independently provided to penetrate the movable sleeve 200 .

[0056] In one embodiment, if Figure 1-Figure 3 As 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 crimped together with the limiting portion 110. When the rod body 100 drives the limiting portion 110 to move along a preset axial direction, the limiting portion 110 can cause the lever mechanism to rotate and drive the valve plug 410 to open or close the connecting hole 220.

[0057] By introducing the lever mechanism, the linkage valve 400 can be precisely controlled. The lever mechanism, as a simple and effective mechanical structure, can convert the linear motion of the rod 100 into the opening and closing motion of the valve plug 410, thereby improving the control accuracy and reliability of the linkage valve 400.

[0058] Specifically, one end of the lever mechanism is connected to the valve plug 410, and the other end is connected to the limiter 110. When the rod body 100 moves, the limiter 110 moves accordingly, thereby driving the lever mechanism to rotate around the fulcrum. This rotational motion is transmitted to the valve plug 410, so that it can accurately open or close the connecting hole 220. This mechanical linkage method is not only simple in structure, but also reliable in operation, and can effectively avoid possible failures or delays in the electronic control system.

[0059] 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 arm, 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.

[0060] Therefore, the present application uses a lever mechanism to control the opening and closing of the linkage valve 400, which not only simplifies the structure but also improves the accuracy of control. Compared with electronic control systems, this mechanical control method has higher reliability and lower failure rate. Especially in harsh environments or long-term use, mechanical control can maintain stable performance and is not easily affected by external factors.

[0061] However, it is not limited thereto. In other embodiments, the limiting portion 110 may also directly drive the valve plug 410 to move along a preset axial direction.

[0062] Further, in one embodiment, if Figure 1-Figure 3 As 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.

[0063] When the limiting portion 110 compresses the elastic member 423, the elastic member 423 can drive the connecting rod 422 to rotate and make the valve plug 410 open the connecting hole 220. When the limiting portion 110 and the elastic member 423 are separated, the elastic member 423 can push the connecting rod 422 to rotate and make the valve plug 410 close the connecting hole 220.

[0064] Such arrangement enables the linkage valve 400 to automatically control the opening and closing state of the connecting hole 220 according to the position of the rod body 100. When the rod body 100 drives the limiting part 110 to move to the position of the compression elastic member 423, the elastic member 423 is compressed, thereby driving the connecting rod 422 to rotate around the fulcrum, so that the valve plug 410 opens the connecting hole 220. In this way, when the heat dissipation cavity 311 expands, the gaseous working medium is allowed to enter the exhaust cavity 312 through the connecting hole 220. On the contrary, when the rod body 100 drives the limiting part 110 away from the elastic member 423, the elastic member 423 will push the connecting rod 422 to rotate in the opposite direction, so that the valve plug 410 closes the connecting hole 220, thereby preventing external air from entering the heat dissipation cavity 311 when the heat dissipation cavity 311 contracts.

[0065] Through this design, the pull-out heat dissipation device of the present application can realize automatic control of the opening and closing of the connecting hole 220, without the need for an additional control mechanism, and has 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 phase change and is discharged at an appropriate time, thereby improving the heat dissipation efficiency.

[0066] Specifically, in one embodiment, if Figure 1-Figure 3 As shown, a mounting groove 111 is formed at one end of the limiting portion 110 facing the first hole 221 , and the elastic member 423 is disposed in the mounting groove 111 .

[0067] Such an arrangement is helpful to reduce the assembly volume of the entire lever mechanism.

[0068] Furthermore, in one embodiment, the elastic member 423 is a compression spring.

[0069] But not limited thereto, in other embodiments, the elastic member 423 may also be a metal spring structure.

[0070] In one embodiment, the pull-out type heat dissipation device further includes a liquid storage portion 500 , in which a liquid medium is provided and the liquid storage portion 500 is connected to the heat dissipation cavity 311 .

[0071] In this configuration, the problem of insufficient liquid medium is solved by adding the liquid storage part 500, thereby improving the heat dissipation efficiency. As an additional storage space for the liquid medium, the liquid storage part 500 can be replenished in time when the liquid medium in the heat dissipation cavity 311 is insufficient, ensuring the continuous heat dissipation process.

[0072] Specifically, the liquid storage part 500 can be set at an appropriate position of the housing 300, for example, it can be located at one side or 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, so that the liquid working medium can flow freely. When the liquid working medium in the heat dissipation cavity 311 is reduced due to evaporation, the liquid working medium in the liquid storage part 500 can be automatically replenished into the heat dissipation cavity 311 through the communication channel to keep the liquid working medium in the heat dissipation cavity 311 sufficient.

[0073] Specifically, in one embodiment, a water replenishment and exhaust hole 510 is provided on the top of the liquid storage part 500 to facilitate the liquid storage part 500 to replenish the liquid working medium and exhaust the gas inside.

[0074] Further, in one embodiment, if Figure 1 As shown, the pull-out type heat dissipation device also includes a liquid absorbent core 600, one end of which is arranged on the liquid storage portion 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 portion 500 through the liquid absorbent core 600, and the liquid working medium in the heat dissipation cavity 311 is adsorbed on the liquid absorbent core 600.

[0075] By arranging the liquid wick 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 wick 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.

[0076] Specifically, the wick 600 can be made of a variety of materials and structures. For example, a wick 600 made of porous materials such as fiber, metal mesh or sintered powder can be used. These materials have good capillary action and can effectively absorb and transmit liquid working fluid. One end of the wick 600 can be fixed in the liquid storage part 500 by embedding, bonding or pressing, and the other end can be attached to or embedded in the inner wall of the heat dissipation cavity 311.

[0077] However, it is not limited thereto. In other embodiments, the liquid medium in the liquid storage portion 500 may also enter the heat dissipation cavity 311 through a control valve.

[0078] Furthermore, in one embodiment, the liquid level of the liquid medium in the liquid storage portion 500 is lower than the height of the liquid wick 600 in the heat dissipation cavity 311. In addition, the liquid wick 600 is attached to the heat generating surface of the power element 700.

[0079] The liquid level of the liquid working medium in the liquid storage part 500 is lower than the setting height of the liquid wick 600 in the heat dissipation cavity 311. This design can effectively prevent the liquid working medium from excessively accumulating 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 liquid 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.

[0080] The present application also provides a robot, which includes the pull-out type heat dissipation device described in any one of the above embodiments.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

[0083] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0088] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" 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: Comprising a rod body (100), a movable sleeve (200), a shell (300) and a linkage valve (400), the shell (300) being provided with a draw-out cavity, the movable sleeve (200) being movably arranged in the draw-out cavity along a preset axial direction, and dividing the draw-out cavity into a heat dissipation cavity (311) and an exhaust cavity (312), the heat dissipation cavity (311) being provided with a liquid working medium, and the heat dissipation cavity (311) being used to dissipate heat from a heating surface of a power element (700); The movable sleeve (200) is provided with an inner cavity (210) and a connecting hole (220), the connecting hole (220) being capable of connecting the heat dissipation cavity (311) and the exhaust cavity (312), one end of the rod body (100) is provided with a limiting portion (110), the other end of the rod body (100) is movably disposed in the inner cavity (210) through the limiting portion (110) and is limitedly matched with both ends of the inner cavity (210) along a preset axial direction, and the linkage valve (400) is movably matched with the limiting portion (110); When the limiting portion (110) abuts against one end of the inner cavity (210) away from the power element (700), the linkage valve (400) closes the communication hole (220); when the limiting portion (110) drives the movable sleeve (200) to continue to move 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 portion (110) abuts against one end of the inner cavity (210) close to the power element (700), the linkage valve (400) opens the connecting hole (220); when the limiting portion (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 atmosphere through the connecting hole (220) and the exhaust cavity (312) in sequence.

2. The pull-out heat dissipation device according to claim 1, characterized in that: The linkage valve (400) comprises 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 crimped to the limiting portion (110), and when the rod body (100) drives the limiting portion (110) to move along a preset axial direction, the limiting portion (110) can cause the lever mechanism to rotate around a fulcrum and drive the valve plug (410) to open or close the connecting hole (220).

3. The pull-out heat dissipation device according to claim 2, characterized in that: The lever mechanism comprises 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); When the limiting portion (110) compresses the elastic member (423), the elastic member (423) can drive the connecting rod (422) to rotate around the fulcrum and enable the valve plug (410) to open the communication hole (220); When the limiting portion (110) and the elastic member (423) are separated, the elastic member (423) can push the connecting rod (422) to rotate around the fulcrum and enable the valve plug (410) to close the communication hole (220).

4. The pull-out heat dissipation device according to claim 1, characterized in that: It also comprises a liquid storage portion (500), wherein the liquid storage portion (500) is provided with a liquid working medium and is connected to the heat dissipation cavity (311).

5. The pull-out heat dissipation device according to claim 4, characterized in that: It also comprises a liquid wick (600), one end of the liquid wick (600) being arranged on the liquid storage portion (500), and the other end being arranged on the inner wall of the heat dissipation cavity (311), so that liquid working medium can enter the heat dissipation cavity (311) from the liquid storage portion (500) through the liquid wick (600), and the liquid working medium in the heat dissipation cavity (311) is adsorbed on the liquid wick (600).

6. The pull-out heat dissipation device according to claim 5, characterized in that: The liquid level of the liquid working medium in the liquid storage portion (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, characterized in that: The connecting hole (220) comprises 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) connects the inner cavity (210) and the heat dissipation cavity (311); the second hole (222) is arranged at one end of the movable sleeve (200) away from the power element (700); the second hole (222) connects the inner cavity (210) and the exhaust cavity (312); and the limiting portion (110) enables 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, characterized in that: The movable sleeve (200) is arranged close to the bottom wall of the power element (700), the side wall of the housing (300) and the heat-generating surface of the power element (700) to form the heat dissipation cavity (311).

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

10. A robot, characterized in that: It comprises a pull-out type heat dissipation device as described in any one of claims 1 to claim 9.

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