Heat pipe heat exchange device

Abstract

The invention relates to a heat pipe heat exchange device, a condensation channel of the heat pipe heat exchange device is provided with communicating ports, a telescopic sleeve hermetically covers all the communicating ports, a movable plate is hermetically assembled at the end, away from the communicating ports, of the telescopic sleeve, and one end of a stop frame is arranged on the side, back to a condensation section, of the movable plate; the pressure sensing element is installed on the stop frame, the pressure sensing element and the movable plate are arranged in a spaced mode, and the gaseous working medium can push the movable plate to move in the direction away from the communication opening; the controller can control the operation power of the power element and the pressure value measured by the pressure sensing element to be in negative correlation, and when the pressure value measured by the pressure sensing element is larger than or equal to a second warning pressure value, the controller can control the power element to stop operating. According to the heat pipe heat exchange device, the problem that when a heat pipe heat exchanger relieves pressure through a pressure relief valve, leakage and loss of a working medium can be caused is solved.

Description

Technical Field

[0001] The present application relates to the field of heat pipe technology, and in particular to a heat pipe heat exchange device. Background Art

[0002] Heat pipe heat exchangers, with their efficient heat transfer capabilities, are playing an increasingly important role in wind, solar, and storage, AI large models, data centers, rail transportation, low-altitude economy, robotics and other fields. Immersion liquid cooling technology, in particular, is known for its better temperature uniformity and greater heat dissipation capacity. The characteristics of immersion liquid cooling technology are: the power components are partially or completely immersed in the liquid working fluid of the heat pipe heat exchanger, and the power components are in direct contact with the liquid working fluid to cause the liquid working fluid to undergo phase change and absorb heat. Specifically, the patent application with patent number CN205017173U and the article entitled "Unlocking Battery Thermal Management Technology: Comparison of Four Major Cooling Technologies" both introduce and compare the advantages and disadvantages of immersion liquid cooling technology and other technical solutions in detail.

[0003] However, heat pipe heat exchangers using immersion liquid cooling technology will also encounter technical challenges. As the size of power components becomes smaller and the heat dissipation becomes larger, the heat pipe heat exchanger will reach a critical point of heat flow during the heat exchange process. At this time, due to the rapid vaporization of the liquid working medium, a continuous gas film will be formed between the contact surface of the power component and the liquid working medium. The gas film will hinder the contact between the liquid working medium and the heating surface of the power component, causing the heat transfer capacity of the liquid working medium to drop sharply, thereby causing the temperature and pressure in the cavity of the heat pipe heat exchanger to increase sharply. The heat pipe heat exchanger may even have the risk of bursting. Therefore, in order to avoid damage to the heat pipe heat exchanger, it is usually necessary to directly arrange temperature and pressure sensing elements in the heat pipe heat exchanger to monitor the temperature and pressure in the heat pipe heat exchanger in real time. Once the critical value is exceeded, the pressure inside the heat pipe heat exchanger is first relieved through the pressure relief valve, and then the output power of the power component is reduced or the power component is directly shut down to reduce the heat generation of the power component.

[0004] However, the above solution not only requires the installation of a pressure sensing element and a temperature sensor in the heat pipe heat exchanger, but also requires the installation of a pressure relief valve. The pressure relief valve will discharge a portion of the working fluid during the pressure relief process, thereby causing the working fluid in the heat pipe heat exchanger to be lost. This will not only further reduce the overall heat dissipation capacity of the heat pipe heat exchanger, but also cause some pollution to the environment. Summary of the Invention

[0005] Based on this, it is necessary to provide a heat pipe heat exchange device to solve the problem that when the existing heat pipe heat exchanger releases pressure through the pressure relief valve, the working fluid will leak and be lost.

[0006] The heat pipe heat exchange device provided by this application includes an evaporation section, a condensation section, a telescopic sleeve, a movable plate, a stop bracket, a pressure sensing element, and a controller. The evaporation section is provided with an evaporation chamber, and the power element is at least partially immersed in the liquid working medium in the evaporation chamber. The condensation section is provided with a plurality of condensation channels respectively communicating with the evaporation chamber. Define the opening at one end of the condensation channel as a communication port. One end of the telescopic sleeve is hermetically covered on the plurality of communication ports, and the movable plate is hermetically assembled at the end of the telescopic sleeve away from the communication port. One end of the stop bracket is fixedly connected to the condensation section, and the other end is arranged on the side of the movable plate facing away from the condensation section; the pressure sensing element is installed on the side of the stop bracket facing the movable plate and is arranged at an interval from the movable plate. The gaseous working medium can push the movable plate to move in a direction away from the communication port and press against the pressure sensing element. When the pressure value measured by the pressure sensing element is greater than or equal to the first warning pressure value, the controller can control the operating power of the power element to be negatively correlated with the pressure value measured by the pressure sensing element. When the pressure value measured by the pressure sensing element is greater than or equal to the second warning pressure value, the controller can control the power element to stop operating. The second warning pressure value is greater than the first warning pressure value.

[0007] In one embodiment, the pressure sensing element is an elastic pressure sensor, and the movable plate can move in a direction away from the communication port and compress the pressure sensing element.

[0008] In one embodiment, the heat pipe heat exchange device further includes a first limiting portion. The first limiting portion is installed on the side of the stop bracket facing the movable plate and is arranged at an interval from the movable plate. The distance between the first limiting portion and the movable plate is greater than the distance between the pressure sensing element and the movable plate. When the movable plate abuts against the first limiting portion, the controller can control the power element to stop operating.

[0009] In one embodiment, the pressure sensing element is a piezoelectric pressure sensor or a piezoresistive pressure sensor.

[0010] In one embodiment, the heat pipe heat exchange device further includes an elastic compression member. One end of the elastic compression member is connected to the side of the movable plate facing away from the communication port, and the other end is connected to the stop bracket. The elastic compression member can apply an elastic acting force to the movable plate in a direction of moving towards the communication port, so that the movable plate can cover the communication port.

[0011] In one embodiment, the heat pipe heat exchange device further includes a second limiting portion. The second limiting portion is installed on the condensation section. When the movable plate moves in a direction towards the communication port, the second limiting portion can stop on the side of the movable plate facing the communication port, and a balance chamber respectively communicating with each communication port can be formed between the movable plate and the condensation section.

[0012] In one embodiment, the communication port is arranged at one end of the condensation section away from the evaporation section.

[0013] In one embodiment, the controller can control the operating power of the power element to have a linear functional relationship with the pressure value measured by the pressure sensing element.

[0014] In one embodiment, the stop frame cover is provided on the outer peripheral side of the telescopic sleeve and the movable plate.

[0015] In one embodiment, the telescopic sleeve is a bellows structure.

[0016] Compared with the prior art, the heat pipe heat exchange device provided by the present application is such that when the power element generates heat and causes the liquid working fluid to vaporize, the gaseous working fluid flows to the connecting port through the condensation channel. The pressure generated by the accumulation of the gaseous working fluid pushes the movable plate to move axially along the telescopic sleeve. When the movable plate contacts the pressure sensing element, the controller receives the pressure signal. If the pressure reaches the first warning pressure value, the controller reduces the operating power of the power element according to a preset ratio, reduces the heat input to slow down the vaporization rate. If the pressure continues to rise to the second warning pressure value, the controller directly turns off the power element and forcibly interrupts the heat source. During the movement of the movable plate, the telescopic sleeve remains sealed to prevent leakage of the working fluid. The spacing design between the stop frame and the movable plate ensures that the pressure sensing element is triggered within a reasonable range to avoid overload damage.

[0017] Compared with the existing technology, the traditional solution passively discharges the working fluid through the pressure relief valve to reduce the pressure. In this solution, the sealing structure composed of the movable plate and the telescopic sleeve can be reset repeatedly. Obviously, as the movable plate drives the telescopic sleeve to extend and move, the total volume of the sealing structure is expanded, thereby having a good pressure relief effect on the condensation channel. Moreover, since the condensation channel, the telescopic sleeve and the movable plate are sealed, the working fluid will not leak, which significantly improves the recycling rate of the working fluid. In addition, the linkage control of the pressure sensing element and the power element realizes closed-loop feedback, avoiding the additional configuration of the temperature sensor. That is, the heat pipe heat exchange device of the present application realizes dynamic pressure regulation under the premise of maintaining the sealed state, effectively preventing leakage and loss of the working fluid.

[0018] Furthermore, it should be noted that the pressure sensing element does not involve sealing issues. Specifically, since the cover structure, the condensation channel and the evaporation chamber are connected to form a closed structure, the working fluid will not escape from the above-mentioned closed structure, and the pressure sensing element is installed on the stop frame. Therefore, the electrical connection between the pressure sensing element and the controller does not need to consider the sealing problem of the heat pipe heat exchange device, which greatly reduces the sealing processing cost of the heat pipe heat exchange device and reduces the probability of leakage in the heat pipe heat exchange device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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.

[0020] Figure 1 A schematic structural diagram of a heat pipe heat exchange device according to an embodiment of the present application;

[0021] Figure 2 This is an exploded view of a heat pipe heat exchange device according to an embodiment of the present application;

[0022] Figure 3 This is a cross-sectional view of a heat pipe heat exchange device according to an embodiment of the present application.

[0023] Figure numerals: 100, evaporation section; 110, evaporation chamber; 111, flange plate; 112, conductive column; 120, power element; 200, condensation section; 210, condensation channel; 211, connecting port; 220, external fin; 300, telescopic sleeve; 400, movable plate; 500, stop frame; 510, through hole; 600, pressure sensing element; 710, first limiting part; 720, second limiting part; 800, elastic compression part; 900, liquid replenishing valve. DETAILED DESCRIPTION

[0024] See also Figures 1-3, in one embodiment, the heat pipe heat exchange device includes an evaporation section 100 and a condensation section 200. The evaporation section 100 is provided with an evaporation chamber 110, and a liquid working medium is filled in the evaporation chamber 110. The power element 120 is arranged in the evaporation chamber 110 and at least partially immersed in the liquid working medium, that is, the power element 120 is partially or fully immersed in the liquid working medium. The heat dissipation principle of the power element 120 is as follows: when the power element 120 generates sufficient heat, the heat will cause the liquid working medium to reach the boiling point and undergo a phase change. At this time, the liquid working medium will vaporize into a gaseous working medium. Then, the gaseous working medium rises from the evaporation section 100 and enters the condensation section 200. The condensation section 200 is provided with a plurality of condensation channels 210 arranged at intervals. The condensation channels 210 are respectively communicated with the evaporation chamber 110, and external fins 220 are arranged between adjacent condensation channels 210. After the gaseous working medium enters each condensation channel 210, it transfers heat to the external fins 220 through the condensation channels 210. The heat of the external fins 220 is mainly transferred to the atmospheric environment through air cooling (natural wind or fan), thereby completing the heat transfer process of the power element 120. It should be noted that internal fins can also be arranged in the condensation channels 210 to increase the attachment area of the gaseous working medium, thereby improving the heat dissipation efficiency of the condensation section 200. And, after the gaseous working medium releases heat, it will re-condense into a liquid working medium. Then, the condensed liquid working medium flows back into the evaporation chamber 110 under the action of gravity, thereby completing a round of heat dissipation cycle of the working medium. The evaporation section 100 is also provided with a liquid replenishing valve 900.

[0025] It should be noted that the power element 120 is connected to external components through external connectors. For example, when the power element 120 is a battery, the external connector is a cable. At this time, one end of the cable is connected to the battery, and the other end is connected to an electrical component such as a motor outside the evaporation section 100; when the power element 120 is a battery cell, the external connector is a data cable. At this time, one end of the data cable is connected to the battery cell, and the other end is connected to a control component outside the evaporation section 100; when the power element 120 is a motor, the external connectors are a power transmission line and the output shaft of the motor. One end of the power transmission line is connected to the motor, and the other end is connected to a power source outside the evaporation section 100. One end of the output shaft is fixedly connected to the rotor of the motor, and the other end is connected to a driven component. Obviously, when the power element 120 operates, it is always connected to external components through external connectors. Therefore, for the sake of the sealing performance of the evaporation chamber 110, the external connectors are all hermetically penetrated through the side wall of the evaporation chamber 110.

[0026] It should be noted that, as Figure 3As shown, when the power element 120 is a battery or a cell, for better sealing, the external connection member can also be a composite assembly structure composed of a cable (or a data cable), a flange plate 111, and a conductive post 112. The flange plate 111 and the conductive post 112 are arranged on the side wall of the evaporation section 100. The flange plate 111 is welded or threadedly connected to the mounting hole on the side wall of the evaporation chamber 110. The conductive post 112 is pre-passed through the flange plate 111 by integral injection molding or welding. The power element 120 is plugged into the inner end (located inside the evaporation chamber 110) of the conductive post 112 through a corresponding cable, and the external component is plugged into the outer end (located outside the evaporation chamber 110) of the conductive post 112 through a corresponding cable. Through the split cable and the flange plate 111 of the conductive post 112, the physical separation and modular connection of the internal and external circuits are realized. When the power element 120 is a motor, a sealing rotating shaft (not shown in the figure) is also provided on the side wall of the evaporation chamber 110. The sealing rotating shaft is sealed and installed on the side wall of the evaporation chamber 110, and the output shaft of the motor is sealed and passed through the sealing rotating shaft to be connected to an external component to be driven. Moreover, the number of the power elements 120 can be one or multiple, and the specific number is not listed one by one here.

[0027] Furthermore, as Figure 2 and Figure 3 shown, the heat pipe heat exchange device further includes a telescopic sleeve 300, a movable plate 400, a stop frame 500, a pressure sensing element 600, and a controller (not shown in the figure). Define the opening at one end of the condensation channel 210 as the communication port 211. Specifically, in one embodiment, the communication port 211 is arranged at the end of the condensation section 200 away from the evaporation section 100.

[0028] Specifically, the gaseous working medium enters the condensation section 200 after being heated in the evaporation section 100. Since the communication port 211 is located at the end of the condensation section 200 away from the evaporation section 100, the gaseous working medium needs to flow along the extension direction of the condensation channel 210 to the end before it can enter the telescopic sleeve 300 through the communication port 211. During this process, the heat of the gaseous working medium gradually dissipates through the wall surface of the condensation channel 210, and part of the working medium liquefies and flows back to the evaporation section 100. When the pressure of the gaseous working medium increases, the movable plate 400 is pushed away from the communication port 211. After the pressure sensing element 600 detects the pressure value, the controller dynamically adjusts the operating state of the power element 120 according to the pressure value, thereby avoiding the pressure exceeding the safety threshold.

[0029] Compared with the prior art, in the present application, by arranging the communication port 211 at the end of the condensation section 200, the gaseous working medium is forced to fully flow through the entire condensation channel 210, the heat is evenly released, and the pressure accumulation is effectively relieved.

[0030] However, it is not limited to this. In other embodiments, the communication port 211 can also be arranged at other side walls of the condensation section 200.

[0031] The movable plate 400 is hermetically installed at one opening side of the telescopic sleeve 300, and the other opening of the telescopic sleeve 300 is hermetically covered on all the communication ports 211. That is to say, the cover structure formed by the telescopic sleeve 300 and the movable plate 400 is hermetically covered on the communication ports 211, so that the cover structure, the condensation channel 210 and the evaporation chamber 110 are communicated to form a closed structure. Specifically, the movable plate 400 is a hard plastic plate or a metal plate, and the telescopic sleeve 300 is a corrugated pipe structure or a flexible film structure. Among them, the corrugated pipe structure increases the telescopic stroke and deformation ability through the transverse corrugation design, can maintain the sealing performance within a larger pressure range, and improves the durability of its own structure at the same time. One end of the telescopic sleeve 300 and the movable plate 400 can be hermetically bonded or connected by fasteners, and the other end of the telescopic sleeve 300 and the edge area of the condensation section 200 are hermetically bonded or connected by fasteners.

[0032] One end of the stop frame 500 is welded or fixedly connected to the evaporation section 100 or the condensation section 200 by fasteners, and the other end is arranged on the side of the movable plate 400 facing away from the condensation section 200. Specifically, in one embodiment, the stop frame 500 covers the outer peripheral sides of the telescopic sleeve 300 and the movable plate 400. Specifically speaking, the stop frame 500 covers the outer peripheral sides of the telescopic sleeve 300 and the movable plate 400. On the one hand, it can form a mechanical restraint. When the gaseous working medium pushes the movable plate 400 to move, the outer peripheral surrounding structure of the stop frame 500 can limit the radial deformation of the telescopic sleeve 300 and prevent the offset between the telescopic sleeve 300 and the movable plate 400 due to pressure fluctuations. At the same time, the stop frame 500 can block external foreign objects from damaging the telescopic sleeve 300 and the movable plate 400. And, the stop frame 500 is provided with a plurality of through holes 510 to facilitate the wires of the pressure sensing element 600 to pass through the through holes 510 and pass through the stop frame 500. And, during the movement of the movable plate 400, the through holes 510 can be used as the channels for intake and exhaust, reducing the movement resistance of the movable plate 400.

[0033] The controller is electrically connected to the pressure sensing element 600 and the power element 120 respectively. The pressure sensing element 600 is installed on the side of the stop bracket 500 facing the movable plate 400 and is arranged at an interval from the movable plate 400. Specifically, the pressure sensing element 600 can be bonded, welded or connected to the stop bracket 500 through fasteners. When the air pressure value in the condensation channel 210 is greater than a certain pressure value, the force balance of the movable plate 400 is broken, and the gaseous working medium can push the movable plate 400 to move away from the communication port 211 and abut against the pressure sensing element 600. When the air pressure value in the condensation channel 210 is greater than or equal to a larger certain pressure value, that is, when the pressure value measured by the pressure sensing element 600 is greater than or equal to the first warning pressure value, the controller can control the power element 120 to reduce the power. Moreover, the controller can make the operating power of the power element 120 and the pressure value measured by the pressure sensing element 600 be negatively correlated. That is, the larger the pressure value measured by the pressure sensing element 600, the smaller the operating power of the power element 120. It should be noted that when the telescopic resistance of the telescopic sleeve 300 and the atmospheric pressure remain unchanged, the difference between the air pressure value in the condensation channel 210 and the first warning pressure value is a constant. Therefore, the air pressure value in the condensation channel 210 can be deduced from the magnitude of the pressure value measured by the pressure sensor.

[0034] Specifically, in an embodiment, the controller can make the operating power of the power element 120 and the pressure value measured by the pressure sensing element 600 be in a linear function relationship. That is, under the control of the controller, the operating power of the power element 120 and the pressure value measured by the pressure sensing element 600 are in a linear function relationship. Specifically, it can be realized through a preset linear algorithm or a proportional adjustment module. When the pressure value rises, the output of the power element 120 is reduced in proportion, so as to directly inhibit the generation rate of the gaseous working medium. Among them, the controller refers to a control unit with data processing and signal output functions, and can specifically be implemented by an embedded microprocessor or a programmable logic controller. By receiving pressure data in real time and executing a preset operation logic, the working state of the power element 120 is dynamically adjusted.

[0035] For example, when the pressure value is equal to the first warning pressure value, the controller adjusts the output power of the power element 120 to 75% of the initial power. When the pressure value is 1.5 times the first warning pressure value, the controller adjusts the output power of the power element 120 to 50% of the initial power. When the pressure value is 2 times the first warning pressure value, the controller adjusts the output power of the power element 120 to 25% of the initial power. When the pressure value is 2.5 times the first warning pressure value, the controller adjusts the output power of the power element 120 to zero. This linear adjustment method enables the heat generation of the power element 120 to always match the vaporization rate of the working medium in the evaporation chamber 110, avoiding thermal shock caused by sudden power drop, and maintaining the dynamic balance of the heat pipe heat exchange device through progressive power control.

[0036] Compared with the prior art, in this solution, power linear attenuation is started at the initial stage when the pressure begins to exceed the first warning pressure value, and the stability of the working medium circulation inside the heat pipe heat exchange device is maintained through smooth power adjustment.

[0037] However, it is not limited to this. In other embodiments, the operating power of the power element 120 and the pressure value measured by the pressure sensing element 600 may also be in an inverse proportional function relationship or other non-functional relationships, etc., which will not be listed one by one here.

[0038] When the pressure value measured by the pressure sensing element 600 is greater than or equal to the second warning pressure value, the controller can control the power element 120 to stop operating, and the second warning pressure value is greater than the first warning pressure value.

[0039] Furthermore, the corresponding expression correlation formula of temperature and pressure can be selected according to the selected working medium type and the reasonable operating temperature range of the power element 120, and then the first warning pressure value and the second warning pressure value can be determined according to the corresponding temperature range. And, for safety reasons, the second warning pressure value is less than the air pressure value corresponding to the highest temperature value.

[0040] Specifically, the expression correlation equation of temperature and pressure can be the ideal gas state equation, PV = nRT, where P is the pressure, V is the gas volume, n is the number of particles, T is the temperature, and R is the Boltzmann constant. That is, the relationship between the temperature and pressure of the gaseous working medium in the condensation channel 210 can be obtained through the ideal gas state equation, and the set first warning pressure value can be obtained through this equation according to the actual first warning temperature value, and the set second warning pressure value can be obtained through this equation according to the actual second warning temperature value. Through experimental analysis, it can be known that when the working medium is R134a refrigerant (tetrafluoroethane), the first warning temperature value is 50 °C, the total volume is 2 L, and the number of particles is 0.2 mol, the calculated first warning pressure value is 0.23 MPa. When the second warning temperature value is 60 °C, the total volume is 2 L, and the number of particles is 1 mol, the calculated second warning pressure value is 0.27 MPa.

[0041] It should be noted that the ideal gas state equation is applicable to the working conditions where the air pressure value is less than 0.5 MPa.

[0042] Of course, when the pressure value ranges from 0.5 MPa to 3 MPa, in order to improve the conversion accuracy of the temperature value and the pressure value, the expression correlation equation of temperature and pressure can also be the van der Waals equation. Of course, when the gaseous working medium is a non-polar and weakly polar gas and its mixture, the expression correlation equation of temperature and pressure can also be the Peng-Robinson (PR) equation or the Peng-Robinson equation modified by the compressibility factor method (PR-Z).

[0043] Specifically, when the power element 120 generates heat and causes the liquid working medium to vaporize, the gaseous working medium flows through the condensation channel 210 to the communication port 211. The pressure generated by the accumulation of the gaseous working medium pushes the movable plate 400 to move axially along the telescopic sleeve 300. When the movable plate 400 contacts the pressure sensing element 600, the controller receives the pressure signal. If the pressure reaches the first warning pressure value, the controller reduces the operating power of the power element 120 according to a preset ratio to reduce the heat input and slow down the vaporization speed. If the pressure continues to rise to the second warning pressure value, the controller directly shuts down the power element 120 to forcibly interrupt the heat source. During the movement of the movable plate 400, the telescopic sleeve 300 remains in a sealed state to prevent the working medium from leaking. The designed distance between the stop frame 500 and the movable plate 400 ensures that the pressure sensing element 600 is triggered within a reasonable range to avoid overload damage.

[0044] Compared with the prior art, in the traditional solution, the working medium is passively discharged through a pressure relief valve to reduce the pressure. In this solution, the sealing structure formed by the movable plate 400 and the telescopic sleeve 300 can be reset repeatedly. Obviously, as the movable plate 400 drives the telescopic sleeve 300 to extend and move, the total volume of the sealing structure is expanded, thereby achieving a good pressure relief effect on the condensation channel 210. Moreover, since a sealing structure is formed among the condensation channel 210, the telescopic sleeve 300 and the movable plate 400, the working medium will not leak, resulting in a significant improvement in the recycling rate of the working medium. In addition, the linkage control between the pressure sensing element 600 and the power element 120 realizes a closed-loop feedback, avoiding the additional configuration of a temperature sensor. That is to say, the heat pipe heat exchange device of the present application realizes dynamic pressure regulation under the premise of maintaining a sealed state, effectively preventing the leakage and loss of the working medium.

[0045] Moreover, it should be noted that the pressure sensing element 600 is not involved in the sealing problem. Specifically, since the cover structure, the condensation channel 210 and the evaporation chamber 110 are connected to form a closed structure, the working medium will not escape from the above-mentioned closed structure. And the pressure sensing element 600 is installed on the stop bracket 500. Therefore, the electrical connection between the pressure sensing element 600 and the controller does not need to consider the sealing problem of the heat pipe heat exchange device, greatly reducing the sealing processing cost of the heat pipe heat exchange device and reducing the probability of liquid leakage of the heat pipe heat exchange device.

[0046] In an embodiment, the pressure sensing element 600 is an elastic pressure sensor. The movable plate 400 can move away from the communication port 211 and compress the pressure sensing element 600. Moreover, when the movable plate 400 and the pressure sensing element 600 are disengaged, the pressure sensing element 600 can be reset.

[0047] It should be noted that such a pressure sensing element 600 that can measure pressure by contact and will deform itself under the action of pressure is usually called an elastic pressure sensor or a mechanical sensor. According to its core working principle and deformation mode, the elastic pressure sensor includes but is not limited to resistive strain gauges and capacitive pressure sensors.

[0048] Specifically, the working principle of the resistive strain gauge is as follows: A strain gauge made of metal foil or semiconductor material is pasted on an elastic body (such as rubber or silica gel). When the elastic body deforms due to the action of pressure, the strain gauge also deforms (tension or compression), and its resistance value will also change accordingly. And by measuring the resistance change through a Wheatstone bridge circuit or other circuits, the magnitude of the pressure value can be deduced.

[0049] The operating principle of a capacitive pressure sensor is that two parallel electrode plates form a capacitor, one of which is usually a movable diaphragm (elastomer). Pressure causes the diaphragm to deform, causing the distance between the two electrode plates or the effective overlap area to change, thereby changing the capacitance value.

[0050] Specifically, when the liquid working medium in the evaporation chamber 110 is heated and vaporized to form a gaseous working medium, the gaseous working medium enters the telescopic sleeve 300 through the connecting port 211 of the condensation channel 210 and pushes the movable plate 400 to move in a direction away from the connecting port 211. During the movement, the movable plate 400 contacts the elastic pressure sensor and applies a compressive force, causing the elastic element to produce a deformation that is positively correlated with the pressure value. The deformation of the elastic element is converted into an electrical signal through an internal conversion mechanism and transmitted to the controller. The controller dynamically adjusts the operating power of the power element 120 according to the received pressure signal. When the pressure value reaches the first warning value, the controller reduces the output power of the power element 120 according to the preset algorithm; when the pressure value reaches a higher second warning value, the controller directly cuts off the power supply of the power element 120.

[0051] Compared with the prior art, this solution directly detects pressure changes through mechanical linkage between the movable plate 400 and the elastic pressure sensor, uses the pressure signal to close the loop to control the operating state of the power element 120, and realizes dynamic pressure regulation while eliminating the pressure relief valve structure.

[0052] However, not limited to this, in other embodiments, the pressure sensing element 600 may also be a piezoelectric pressure sensor or a piezoresistive pressure sensor. The operating principle of a piezoelectric pressure sensor is to utilize the piezoelectric effect of certain crystalline materials (such as quartz and piezoelectric ceramics). When pressure causes the piezoelectric crystal to deform (compress or bend), an electric charge proportional to the pressure is generated on its surface. The operating principle of a piezoresistive pressure sensor is to utilize the piezoresistive effect of semiconductor materials (typically silicon). When an elastic structure, such as a silicon diaphragm, deforms under pressure, the resistance of the semiconductor resistor embedded in the diaphragm changes significantly due to the stress.

[0053] Furthermore, in one embodiment, Figure 2 and Figure 3As shown in the figure, the heat pipe heat exchange device further includes a first limiting portion 710. The first limiting portion 710 is installed on the side of the stop frame 500 facing the movable plate 400 and is arranged at an interval from the movable plate 400. Moreover, the distance between the first limiting portion 710 and the movable plate 400 is greater than the distance between the pressure sensing element 600 and the movable plate 400. When the movable plate 400 abuts against the first limiting portion 710, at this time, the pressure sensing element 600 cannot be further compressed, and the pressure value of the pressure sensing element 600 remains constant. The controller can control the power element 120 to stop running immediately. And, for safety considerations, when the movable plate 400 abuts against the first limiting portion 710, the sum of the air pressure value in the condensation channel 210, the expansion and contraction resistance of the expansion sleeve 300, and the atmospheric pressure is less than or equal to the second warning pressure value.

[0054] Specifically, the first limiting portion 710 is made of a hard material that is extremely difficult to compress, such as a metal block or a hard plastic block. Moreover, the first limiting portion 710 can be bonded, welded, or connected to the stop frame 500 through fasteners.

[0055] When the pressure of the gaseous working medium rises and pushes the movable plate 400 away from the communication port 211, the movable plate 400 first contacts the pressure sensing element 600. At this time, the controller dynamically adjusts the operating power of the power element 120 according to the pressure value. If the pressure continues to rise and the movable plate 400 further moves to contact the first limiting portion 710, at this time, the controller directly cuts off the operation of the power element 120, and the system overpressure is avoided through pressure grading control and a dual protection mechanism.

[0056] In an embodiment, as Figure 2 and Figure 3 shown in the figure, the heat pipe heat exchange device further includes an elastic compression member 800. One end of the elastic compression member 800 is connected to the side of the movable plate 400 facing away from the communication port 211, and the other end is connected to the stop frame 500. The elastic compression member 800 can apply an elastic force to the movable plate 400 to move it in the direction close to the communication port 211, so that the movable plate 400 can cover the communication port 211. Specifically, when the air pressure value in the condensation channel 210 is less than the preset pressure value, the elastic compression member 800 can push the movable plate 400 to cover the communication port 211. The preset pressure value can be between one standard atmospheric pressure and three standard atmospheric pressures (including the critical value), and the elastic coefficient of the elastic compression member 800 depends on the size of the set preset pressure value.

[0057] Specifically, the elastic compression member 800 can be a compression spring or a spring sheet structure, and multiple compression springs or spring sheet structures are evenly distributed on one side of the movable plate 400.

[0058] With such a setting, when the air pressure in the condensation channel 210 is relatively small, the movable plate 400 rebounds and covers the communication port 211, avoiding the liquefaction of the gaseous working medium in the telescopic sleeve 300, thereby preventing the gaseous working medium from remaining in the telescopic sleeve 300, which is beneficial to the condensation and reflux of the working medium.

[0059] Further, in one embodiment, as Figure 3 shown, the heat pipe heat exchange device further includes a second limiting portion 720. The second limiting portion 720 is installed (which can be by bonding, welding or connecting through fasteners) at the edge of the communication port 211 of the condensation section 200. Specifically, it can be the solid area of the condensation section 200 between adjacent condensation channels 210, or the solid area at the end of the condensation section 200. When the movable plate 400 moves towards the direction close to the communication port 211, the second limiting portion 720 can stop on the side of the movable plate 400 facing the communication port 211 to prevent the movable plate 400 from directly contacting the communication port 211 of the condensation section 200. And, by setting the second limiting portion 720, a balance cavity is formed by spacing the movable plate 400 and the communication port 211 of the condensation section 200. The balance cavity can balance the air pressures of different condensation channels 210, enabling the gaseous working medium in the condensation channels 210 to be redistributed through the balance cavity, improving the heat dissipation uniformity at various parts of the condensation section 200.

[0060] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of 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.

[0061] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting 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 the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

[0062] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "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, and 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 limiting the present application.

[0063] 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.

[0064] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0065] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] 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 an intermediate 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 an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments 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 associated listed items.

Claims

1. A heat pipe heat exchange device, characterized in that, It includes an evaporation section (100), a condensation section (200), a telescopic sleeve (300), a movable plate (400), a stop bracket (500), a pressure sensing element (600) and a controller. The evaporation section (100) is provided with an evaporation chamber (110), and a power element (120) is at least partially immersed in the liquid working medium in the evaporation chamber (110). The condensation section (200) is provided with a plurality of condensation channels (210) respectively communicating with the evaporation chamber (110). An opening at one end of the condensation channel (210) is defined as a communication port (211). One end of the telescopic sleeve (300) is hermetically covered on a plurality of the communication ports (211). The movable plate (400) is hermetically assembled at one end of the telescopic sleeve (300) away from the communication port (211). One end of the stop bracket (500) is fixedly connected to the condensation section (200), and the other end is arranged on the side of the movable plate (400) facing away from the condensation section (200). The pressure sensing element (600) is installed on the side of the stop bracket (500) facing the movable plate (400) and is arranged at an interval from the movable plate (400). The gaseous working medium can push the movable plate (400) to move in a direction away from the communication port (211) and press against the pressure sensing element (600). When the pressure value measured by the pressure sensing element (600) is greater than or equal to the first warning pressure value, the controller can control the operating power of the power element (120) to be negatively correlated with the pressure value measured by the pressure sensing element (600). When the pressure value measured by the pressure sensing element (600) is greater than or equal to the second warning pressure value, the controller can control the power element (120) to stop operating. The second warning pressure value is greater than the first warning pressure value.

2. The heat pipe heat exchange device according to claim 1, characterized in that, The pressure sensing element (600) is an elastic pressure sensor, and the movable plate (400) can move in a direction away from the communication port (211) and compress the pressure sensing element (600).

3. The heat pipe heat exchange device according to claim 2, wherein It further includes a first limiting portion (710). The first limiting portion (710) is installed on the side of the stop bracket (500) facing the movable plate (400) and is arranged at an interval from the movable plate (400). The distance between the first limiting portion (710) and the movable plate (400) is greater than the distance between the pressure sensing element (600) and the movable plate (400). When the movable plate (400) abuts against the first limiting portion (710), the controller can control the power element (120) to stop operating.

4. The heat pipe heat exchange device according to claim 1, characterized in that The pressure sensing element (600) is a piezoelectric pressure sensor or a piezoresistive pressure sensor.

5. The heat pipe heat exchange device according to claim 1, characterized in that, Further included is an elastic compression member (800), one end of the elastic compression member (800) is connected to a side of the movable plate (400) facing away from the communication port (211), and the other end is connected to the stop frame (500). The elastic compression member (800) can apply an elastic force to the movable plate (400) to move it in a direction close to the communication port (211), so that the movable plate (400) can cover the communication port (211).

6. The heat pipe heat exchange device according to claim 5, characterized in that, Further included is a second limiting portion (720), the second limiting portion (720) is installed on the condensation section (200). When the movable plate (400) moves in a direction close to the communication port (211), the second limiting portion (720) can stop on a side of the movable plate (400) facing the communication port (211), and a balance cavity communicating with each communication port (211) can be formed between the movable plate (400) and the condensation section (200).

7. The heat pipe heat exchange device according to claim 1, characterized in that, The communication port (211) is provided at one end of the condensation section (200) away from the evaporation section (100).

8. The heat pipe heat exchange device according to claim 1, wherein The controller can control the operating power of the power element (120) to have a linear function relationship with the pressure value measured by the pressure sensing element (600).

9. The heat pipe heat exchange device according to claim 1, characterized in that The stop frame (500) covers the outer peripheral sides of the telescopic sleeve (300) and the movable plate (400).

10. The heat pipe heat exchange device according to claim 1, characterized in that, The telescopic sleeve (300) is of a corrugated pipe structure.

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