Heat transfer device driven by linear motor
Through the heat transfer device driven by a linear motor, the fluid working fluid reciprocates in the thermally conductive filler, solving the problem of limited heat transfer ability of the heat pipe under reverse gravity and low temperature, and improving the heat transfer efficiency and device reliability.
Patent Information
- Application Number
- CN202510591011.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-07-25
AI Technical Summary
The existing heat pipes are difficult to work under countergravity, the capillary drive heat pipe heat pipe has limited heat transfer capacity, and the mechanical pump drive heat pipe has poor reliability at low temperatures, which limits the improvement of heat pipe performance and application.
The heat transfer device driven by a linear motor is used to drive the fluid working fluid back and forth in the thermally conductive filler through the driving device to get rid of the constraints of capillary force and gravity, so that heat can be transported from the heat absorption part to the heat dissipation part.
The normal operation of the heat transfer device under reverse gravity is achieved, the heat transfer efficiency is improved, the reliability requirements for the drive device are reduced, and the heat transfer pipe structure is allowed to bend, which is suitable for low-temperature environments.
Smart Images
Figure CN120368761A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of heat transfer equipment, and particularly relates to a heat transfer device driven by a linear motor. Background Art
[0002] Due to its high thermal efficiency, good isothermal property, light weight, small size, and convenient maintenance, heat pipes are widely used in aerospace and ground heat transfer. Heat pipe technology generally refers to devices that transfer heat naturally through the phase change of working fluids. According to the different ways of condensate return, heat pipes can be divided into capillary-driven heat pipes, gravity heat pipes, and mechanically pumped heat pipes.
[0003] However, different types of traditional heat pipes all have different problems. For example, in capillary-driven heat pipes, the liquid-phase working fluid needs to rely on capillary force to return to the evaporation section, so the heat transfer capacity of capillary-driven heat pipes is limited by the magnitude of capillary force; in gravity heat pipes, the condensed liquid working fluid needs to rely on gravity to flow back along the pipe wall to the evaporation section, so gravity heat pipes are difficult to work under reverse gravity conditions; mechanically pumped heat pipes use a mechanical pump as a driving element to drive the working fluid to circulate in the loop. When used for low-temperature structure heat transfer, since the temperature of the working fluid is low, the low-temperature working fluid flowing through the mechanical pump will have an adverse impact on the reliability of the mechanical pump, so the requirements for the mechanical pump are extremely high; this limits the improvement of heat pipe performance and wider applications.
[0004] To solve the above problems, the present invention proposes a heat transfer device driven by a linear motor with better comprehensive performance. Summary of the Invention
[0005] To solve the above problems, the present invention provides a heat transfer device driven by a linear motor, which drives a fluid working fluid to reciprocate in a heat conduction filler to achieve heat transfer, improving the comprehensive performance of the heat transfer device driven by a linear motor.
[0006] To achieve the above object, the present invention provides the following solutions: including:
[0007] A heat transfer pipe, the heat transfer pipe includes a heat absorption part for heat exchange connection with the position to be cooled and a heat dissipation part for heat dissipation. The heat transfer pipe is filled with a heat conduction filler, and a fluid passage for the fluid to pass through is provided in the heat conduction filler;
[0008] A fluid working fluid, the fluid working fluid is filled in the fluid passage;
[0009] A driving device, the first end and the second end of the fluid passage are respectively connected to the driving device, and the driving device can respectively provide pressure to the first end and the second end to drive the fluid working fluid to reciprocate in the fluid passage.
[0010] Preferably, the driving device includes a linear compressor, the linear compressor includes a compression chamber and two back-pressure chambers, the compression chamber is communicated with the first end, and the two back-pressure chambers are both communicated with the second end.
[0011] Preferably, the compression chamber is communicated with the first end through a first pipeline, the back-pressure chamber is communicated with the second end through a second pipeline, the second pipeline includes two branch pipes and a main pipe, the inlet ends of the two branch pipes are respectively communicated with the outlet of one back-pressure chamber, the outlet ends of the two branch pipes are communicated with the inlet end of the main pipe, and the outlet end of the main pipe is communicated with the second end.
[0012] Preferably, the working fluid is a gaseous working fluid.
[0013] Preferably, a working fluid reservoir is further included, the gaseous working fluid is filled in the working fluid reservoir, the gas outlet of the working fluid reservoir is communicated with the heat transfer pipe, and a valve is arranged between the gas outlet and the heat transfer pipe.
[0014] Preferably, a heating device is arranged outside the working fluid reservoir, and the heating device is thermally conductively connected to the working fluid reservoir.
[0015] Preferably, the heat-conducting filler has a porous structure, and the pores in the heat-conducting filler communicate with each other to form the fluid channel.
[0016] The present invention has achieved the following technical effects compared with the prior art:
[0017] In the heat transfer device driven by a linear motor disclosed in the present invention, the heat absorption part is used for heat exchange connection with the position to be cooled, and can transfer the heat of the position to be cooled to the heat-conducting filler around the heat absorption part, so that the temperature of the fluid working medium in this part of the heat-conducting filler will also increase accordingly. The driving device can drive the fluid working medium in the fluid channel to reciprocate. During the reciprocating movement of the fluid working medium, it can transfer its own heat to the heat-conducting filler in contact with it. Then, during the continuous reciprocating movement of the fluid working medium, the heat is transported from the heat absorption part to the heat dissipation part, realizing rapid heat transfer. The driving device can provide the power required for the movement of the fluid working medium, enabling the fluid working medium to get rid of the constraints of capillary force and gravity. On the one hand, it gets rid of the dependence on the capillary core structure, allowing the heat transfer tube structure to bend significantly. On the other hand, it enables the heat transfer device driven by a linear motor to work against gravity, reducing the requirements for the use environment of the heat transfer device driven by a linear motor. At the same time, the fluid working medium transfers heat through reciprocating movement. Therefore, when used for heat transfer of a low-temperature structure, the low-temperature fluid working medium does not need to flow through the driving device, avoiding the problem that the low-temperature fluid working medium flowing through the driving device has an adverse impact on the reliability of the driving device, reducing the requirements for the driving device, improving the reliability during the operation of the driving device, and thus achieving the technical effect of improving the comprehensive performance of the heat transfer device driven by a linear motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1 Schematic diagram of an embodiment of the present invention.
[0020] Among them, 1, heat transfer tube; 2, heat-conducting filler; 3, driving device; 4, compression chamber; 5, back pressure chamber; 6, linear motor; 7, first pipeline; 8, branch pipe; 9, main pipeline; 10, working medium reservoir; 11, valve; 12, piston. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0022] The object of the present invention is to provide a heat transfer device driven by a linear motor. Through the reciprocating motion of a fluid working medium and in cooperation with a heat-conducting filler capable of storing heat, rapid heat transfer is achieved, and the comprehensive performance of the heat transfer device driven by the linear motor is improved.
[0023] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Reference Figure 1, the heat transfer device driven by a linear motor disclosed in the embodiments of the present invention includes: a heat transfer pipe 1, a fluid working medium, and a driving device 3; wherein, the heat transfer pipe 1 includes an endothermic part and a heat dissipation part, the endothermic part is used for heat exchange connection with the position to be dissipated, the heat dissipation part is used for dissipating heat from the heat transfer pipe 1, the heat transfer pipe 1 is filled with a heat conduction filler 2, and a fluid passage for the fluid to pass through is formed in the heat conduction filler 2, the fluid working medium is filled in the fluid passage, the fluid passage has a first end and a second end, and the first end and the second end of the fluid passage are respectively communicated with the driving device 3, and the driving device 3 can respectively provide pressures to the first end and the second end. During operation, the endothermic part is heat exchange connected with the position to be dissipated, and can transfer the heat of the position to be dissipated to the heat conduction filler 2 at the position of the endothermic part. The heat conduction filler 2 itself has the effects of heat storage and heat conduction. Therefore, the temperature of the heat conduction filler 2 near the endothermic part will increase. At the same time, the temperature of the fluid working medium filled in this part of the heat conduction filler 2 will also increase accordingly. It can be understood that at the same time, the pressures provided by the driving device 3 to the first end and the second end are different. When the pressure value at the first end is greater than the pressure value at the second end, the fluid working medium can move in the direction from the first end to the second end. When the pressure value at the first end is less than the pressure value at the second end, the fluid working medium can move in the direction from the second end to the first end. By repeating the above two situations, the fluid working medium can reciprocate in the fluid passage; during the reciprocating movement of the fluid working medium, it can transfer the heat at the position of the endothermic part to the heat dissipation part. Specifically, taking the first end on the left, the second end on the right, the endothermic part on the left, and the heat dissipation part on the right as an example, when the pressure on the left is greater, the fluid working medium with a higher temperature around the endothermic part moves to the right and can contact the heat conduction filler 2 with a lower temperature on the right, and then transfers its own heat to the heat conduction filler 2 with a lower temperature on the right. When the pressure on the right is greater, the fluid working medium that has completed heat exchange with the heat conduction filler 2 on the right returns to the left again. At this time, the temperature of the fluid working medium is lower than the temperature of the heat conduction filler 2 on the left, and the fluid working medium can absorb heat from the heat conduction filler 2 on the left and increase its temperature again. In this way, the heat on the left can be transferred to the right, and the entire heat conduction filler 2 is filled with the fluid working medium. During the left and right movement of the fluid working medium, it can continuously transfer the heat at the high-temperature position to the low-temperature position, and finally realize the transfer of the heat of the endothermic part to the heat dissipation part through the reciprocating movement of the fluid working medium.Since the driving device 3 can provide the driving force required for the movement of the fluid working medium during the heat transfer process, during the operation of the heat transfer device driven by a linear motor, it is not necessary to consider the influence of gravity on the fluid working medium. That is, the heat transfer device driven by a linear motor can operate against gravity. And compared with a heat pipe that returns liquid through capillary force, the working performance of the heat transfer device driven by a linear motor in this application is not affected by capillary force, allowing the heat transfer tube structure to bend significantly, and the heat transfer efficiency is higher. At the same time, the fluid working medium only needs to perform reciprocating motion during the heat transfer process and does not flow through the driving device 3. Especially in a low-temperature environment, the low-temperature fluid working medium does not flow through the driving device 3, which can also reduce the low-temperature resistance requirements for the driving device 3. Compared with the existing heat pipes, the heat transfer device in this application has better comprehensive performance.
[0025] Preferably, the heat dissipation part is used to connect with a heat dissipation structure, and the heat dissipation structure can accelerate the external dissipation of the heat of the heat dissipation part. The heat dissipation structure can be heat dissipation fins, a heat dissipation fan, etc.; of course, the heat dissipation part can also be directly exposed to the air and transfer its own heat directly to the air through contact heat transfer.
[0026] Those skilled in the art can understand that: the driving device 3 can be a device with at least two pressure output ports, and this device provides driving forces to the first end and the second end respectively through the two output ports; it can also be two independent devices, each device having at least one pressure output port, and the two devices provide driving forces to the first end and the second end respectively; it can also be a device that outputs driving force outward through the main road of a Y-shaped pipeline, and the two branches of the Y-shaped pipeline are respectively connected to the first end and the second end, and on-off valves are arranged at the connection positions of the branches and the main road of the Y-shaped pipeline to control the output of the driving force to the first end or the second end; as long as it can meet the requirement of outputting driving force to the first end and the second end, and ensure that at the same time, the pressure values provided by the driving device 3 to the first end and the second end are different. The heat absorption part and the heat dissipation part are arranged at intervals to meet the requirement of dissipating heat from the position to be dissipated. On the premise of meeting the requirement that the heat absorption part and the heat dissipation part are arranged at intervals, the heat absorption part can be arranged at both ends of the heat transfer tube 1, or can be arranged at any position between both ends of the heat transfer tube 1. Correspondingly, the heat dissipation part only needs to be arranged at intervals with the heat absorption part. The numbers of the heat absorption part and the heat dissipation part can be adjusted adaptively according to actual needs.
[0027] Preferably, the heat absorption part is arranged at one end of the heat transfer tube 1, and the heat dissipation part is arranged at the other end of the heat transfer tube 1.
[0028] Further, the heat conduction filler 2 is filled in the heat transfer tube 1, and the pressure output ports of the driving device 3 are respectively connected to both ends of the heat transfer tube 1, thereby establishing a connection relationship with the first end and the second end of the heat conduction filler 2.
[0029] As a preferred embodiment, the driving device 3 is a linear compressor, which includes a compression chamber 4 and two back-pressure chambers 5. The compression chamber 4 communicates with the first end, and both of the two back-pressure chambers 5 communicate with the second end. Further, the linear compressor has two pistons 12. The compression chamber 4 is arranged between the two pistons 12, and the two back-pressure chambers 5 are respectively arranged on the sides of the two pistons 12 away from the compression chamber 4. When the pistons 12 of the linear compressor expand, the pressure in the two back-pressure chambers 5 increases, and the pressure in the compression chamber 4 decreases. At this time, the fluid working medium in the fluid passage moves from the second end to the first end. When the pistons 12 contract, the pressure in the two back-pressure chambers 5 decreases, and the pressure in the compression chamber 4 increases. The fluid working medium in the fluid passage moves from the first end to the second end. Each side of the piston 12 of the linear compressor can compress gas, and the exhaust volume per unit time is larger. Moreover, the two pistons 12 can move towards or away from the compression chamber 4 at the same time, and the inertial forces brought by their movements to the whole device can cancel each other out, thereby reducing the vibration during the operation of the device and improving the stability of the device.
[0030] As a preferred embodiment, the driving device 3 further includes a linear motor 6. The output shaft of the linear motor 6 is in transmission connection with the linear compressor to drive the linear compressor to work and then drive the piston 12 to reciprocate through the linear motor 6. The linear motor 6 has a simple structure, low maintenance cost, and small vibration during the movement, reducing the maintenance cost of the device. Moreover, the fluid working medium only needs to reciprocate during the heat transfer process and will not flow through the linear motor 6, ensuring the stability of the linear motor 6.
[0031] As a preferred embodiment, the compression chamber 4 communicates with the first end through a first pipeline 7, and the back-pressure chamber 5 communicates with the second end through a second pipeline. The second pipeline includes two branch pipes 8 and a main pipe 9. The inlet ends of the two branch pipes 8 are respectively connected to the outlets of a back-pressure chamber 5, the outlet ends of the two branch pipes 8 are connected to the inlet end of the main pipe 9, and the outlet end of the main pipe 9 is connected to the second end. By connecting in the above manner, while ensuring the stable connection between the back-pressure chamber 5 and the second end of the fluid passage, the pipeline layout is simplified.
[0032] As a preferred embodiment, the fluid working medium is a gas working medium. The fluid working medium can also be a liquid working medium. Compared with the liquid working medium, the gas working medium has a smaller mass, so its own inertia is also smaller. During the reciprocating movement, the vibration it brings is relatively smaller, reducing the overall vibration of the device. Moreover, due to its small mass, it is relatively easier to drive. Therefore, the requirements for the driving device 3 are also lower, reducing the input cost of the device.
[0033] Preferably, the fluid working medium can be a gas with heat conduction effect commonly used in the prior art, such as helium, nitrogen, or hydrogen.
[0034] As a preferred embodiment, the heat transfer device driven by a linear motor further includes a working fluid reservoir 10 filled with a gaseous working fluid. The gas outlet of the working fluid reservoir 10 is communicated with the heat transfer tube 1, and a valve 11 is arranged between the gas outlet and the heat transfer tube 1. The working fluid reservoir 10 can be used to temporarily store the fluid working fluid.
[0035] Preferably, a heating device is arranged outside the working fluid reservoir 10 and is thermally conductively connected to the working fluid reservoir 10, and the heating device can be used to heat the fluid working fluid in the working fluid reservoir 10. When using a gaseous working fluid for heat transfer, affected by the low-temperature environment, the pressure in the heat transfer tube 1 will decrease, affecting the heat transfer efficiency. By heating the working fluid reservoir 10 with the heating device, the gaseous working fluid in the working fluid reservoir can be expanded. At this time, when the valve 11 is opened, the pressure in the heat transfer tube 1 can also be increased correspondingly, thereby realizing the effect of adjusting the pressure in the heat transfer tube 1 through the working fluid reservoir 10 and ensuring the heat transfer efficiency of the heat transfer device in a low-temperature environment.
[0036] As a preferred embodiment, the heat-conducting filler 2 has a porous structure, and the pores in the heat-conducting filler 2 are interconnected to form a fluid channel; further, the heat-conducting filler 2 is composed of copper particles and / or a metal copper mesh. Specifically, the copper particles and / or the metal copper mesh are filled into the heat transfer tube 1, and there are pores between adjacent copper particles and / or metal copper meshes, and the adjacent pores are interconnected to form a fluid channel, that is, there is no fixed channel in the heat-conducting filler 2, and the fluid channel is composed of the pores between the copper particles and / or the metal copper mesh. Even if the heat transfer tube 1 is bent or deformed in other forms, these pores will not completely disappear, and the fluid working fluid can still reciprocate for heat exchange, effectively improving the stability of the heat transfer device driven by a linear motor during operation.
[0037] Preferably, there is good thermal contact between the heat transfer tube 1 and the heat-conducting filler 2.
[0038] Adaptations made according to actual needs are all within the protection scope of the present invention.
[0039] It should be noted that for those skilled in the art, obviously, the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. A heat transfer device driven by a linear motor, characterized in that, Comprising: A heat transfer tube (1), the heat transfer tube (1) comprising a heat absorption part for heat exchange connection with a position to be cooled and a heat dissipation part for heat dissipation. The heat transfer tube (1) is filled with a heat conducting filler (2), and a fluid passage for a fluid to pass through is formed in the heat conducting filler (2). A fluid working medium, which is filled in the fluid passage. A driving device (3), the first end and the second end of the fluid passage are respectively communicated with the driving device (3), and the driving device (3) can respectively provide pressures to the first end and the second end to drive the fluid working medium to reciprocate in the fluid passage.
2. The heat transfer device driven by a linear motor according to claim 1, characterized in that, The driving device (3) comprises a linear compressor, and the linear compressor comprises a compression chamber (4) and two back pressure chambers (5). The compression chamber (4) is communicated with the first end, and both of the two back pressure chambers (5) are communicated with the second end.
3. The linear motor-driven heat transfer device according to claim 2, wherein The compression chamber (4) is communicated with the first end through a first pipeline (7), and the back pressure chamber (5) is communicated with the second end through a second pipeline. The second pipeline comprises two branch pipes (8) and a main pipe (9). The inlet ends of the two branch pipes (8) are respectively communicated with the outlet of one back pressure chamber (5), the outlet ends of the two branch pipes (8) are communicated with the inlet end of the main pipe (9), and the outlet end of the main pipe (9) is communicated with the second end.
4. The heat transfer device driven by a linear motor according to claim 1, wherein The fluid working medium is a gaseous working medium.
5. The linear motor-driven heat transfer device according to claim 4, characterized in that It further comprises a working medium reservoir (10), the working medium reservoir (10) is filled with the gaseous working medium, the gas outlet of the working medium reservoir (10) is communicated with the heat transfer tube (1), and a valve (11) is arranged between the gas outlet and the heat transfer tube (1).
6. The heat transfer device driven by a linear motor according to claim 5, wherein A heating device is arranged outside the working medium reservoir (10), and the heating device is in heat conduction connection with the working medium reservoir (10).
7. The heat transfer device driven by a linear motor according to claim 1, wherein The heat conducting filler (2) has a porous structure, and the pores in the heat conducting filler (2) are interconnected to form the fluid passage.