Heat pipe heat exchange device

Abstract

The present application relates to a heat pipe heat exchange device, wherein the condensing channel of the heat pipe heat exchange device is provided with a connecting port, a telescopic sleeve sealing cover is provided at all the connecting ports, a movable plate is sealed and assembled at the end of the telescopic sleeve away from the connecting port, and one end of the stop frame is provided on the side of the movable plate facing away from the condensing section; a pressure sensing element is installed on the stop frame and spaced apart from the movable plate, and a gaseous working medium can push the movable plate to move in a direction away from the connecting port; when the pressure value measured by the pressure sensing element is greater than or equal to a 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 a second warning pressure value, the controller can control the power element to stop operating. The heat pipe heat exchange device provided by the present application solves the problem of working medium leakage and loss caused by pressure relief of the heat pipe heat exchanger through a pressure relief valve.

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 in the present application includes an evaporation section, a condensation section, a telescopic sleeve, a movable plate, a stop frame, 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 multiple condensation channels respectively connected to the evaporation chamber. The opening at one end of the condensation channel is defined as a connecting port. A sealing cover at one end of the telescopic sleeve is provided on the multiple connecting ports. The movable plate is sealingly assembled on the end of the telescopic sleeve away from the connecting port. One end of the stop frame is fixedly connected to the condensation section, and the other end is provided 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 frame facing the movable plate and is spaced apart from the movable plate. The gaseous working medium can push the movable plate to move in a direction away from the connecting port and press against the pressure sensing element. When the pressure value measured by the pressure sensing element is greater than or equal to a 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 a 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 also includes a first limiting portion, which is installed on the side of the stop frame facing the movable plate and is spaced apart 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 running.

[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 also 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 connecting port, and the other end is connected to the stop frame. The elastic compression member can apply an elastic force to the movable plate to move toward the connecting port so that the movable plate can cover the connecting port.

[0011] In one embodiment, the heat pipe heat exchange device also includes a second limiting portion, which is installed on the condensing section. When the movable plate moves toward the direction close to the connecting port, the second limiting portion can stop on the side of the movable plate facing the connecting port, and enable a balance cavity to be formed between the movable plate and the condensing section, which is respectively connected to each connecting port.

[0012] In one embodiment, the communication port is provided at an 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 Figure 1-Figure 3In 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. The evaporation chamber 110 is filled with a liquid working medium. The power element 120 is arranged in the evaporation chamber 110 and is at least partially immersed in the liquid working medium. That is, the power element 120 is partially or completely immersed in the liquid working medium. The heat dissipation principle of the power element 120 is: when the power element 120 generates enough heat, the heat will cause the liquid working medium to reach a boiling point and undergo a phase change. At this time, the liquid working medium will vaporize into a gaseous working medium. The gaseous working medium then rises from the evaporation section 100 and enters the condensation section 200. The condensation section 200 is equipped with multiple spaced condensation channels 210, each connected to the evaporation chamber 110. External fins 220 are located between adjacent condensation channels 210. After entering each condensation channel 210, the gaseous working medium transfers heat to the external fins 220 through the condensation channels 210. The heat from the external fins 220 is primarily transferred to the atmosphere through air cooling (natural wind or a fan), thereby completing the heat transfer process from the power components 120. It should be noted that internal fins can also be provided within the condensation channels 210 to increase the adhesion area of ​​the gaseous working medium and thereby improve the heat dissipation efficiency of the condensation section 200. Furthermore, after releasing heat, the gaseous working medium recondenses into liquid working medium. The condensed liquid working medium then flows back into the evaporation chamber 110 under the action of gravity, completing a heat dissipation cycle for the working medium. The evaporation section 100 is also equipped with a refill valve 900 for refilling the liquid.

[0025] It should be noted that the power element 120 is connected to external components via external connectors. For example, when the power element 120 is a battery, the external connector is a cable. In this case, one end of the cable is connected to the battery, and the other end is connected to a power-consuming 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. In this case, one end of the data cable is connected to the battery cell, and the other end is connected to a component to be controlled outside the evaporation section 100. When the power element 120 is a motor, the external connector is 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 the component to be driven. Obviously, when the power element 120 is in operation, it will be connected to external components via external connectors. Therefore, in order to ensure the sealing of the evaporation chamber 110, the external connectors are all sealed and penetrated through the side wall of the evaporation chamber 110.

[0026] It should be noted that if Figure 3As shown, when the power element 120 is a battery or a battery cell, for better sealing, the external connector can also be a composite assembly structure consisting of a cable (or data cable), a flange plate 111 and a conductive column 112. The flange plate 111 and the conductive column 112 are arranged on the side wall of the evaporation section 100, and the flange plate 111 is welded or threadedly connected to the mounting hole on the side wall of the evaporation chamber 110. The conductive column 112 is pre-inserted into the flange plate 111 by integral injection molding or welding. The power element 120 is connected to the inner end of the conductive column 112 (located inside the evaporation chamber 110) through the corresponding cable, and the external components are connected to the outer end of the conductive column 112 (located outside the evaporation chamber 110) through the corresponding cable. The split-type cables, in conjunction with the flange plate 111 of the conductive column 112, realize the physical separation and modular connection of the internal and external circuits. When the power element 120 is a motor, a sealed shaft (not shown) is further provided on the sidewall of the evaporation chamber 110. The sealed shaft is hermetically mounted on the sidewall of the evaporation chamber 110. The motor's output shaft is hermetically threaded through the sealed shaft for connection to an external driven component. The number of power elements 120 can be one or more, and the specific number is not listed here.

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

[0028] Specifically, after being heated in the evaporation section 100, the gaseous working medium enters the condensation section 200. Since the connecting port 211 is located at the end of the condensation section 200 away from the evaporation section 100, the gaseous working medium must flow along the extension direction of the condensation channel 210 to the end before it can enter the telescopic sleeve 300 through the connecting port 211. During this process, the heat of the gaseous working medium is gradually dissipated through the wall 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 connecting 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 preventing the pressure from exceeding the safety threshold.

[0029] Compared with the prior art, the present application sets the connecting port 211 at the end of the condensation section 200, forcing the gaseous working medium to fully flow through the entire condensation channel 210, so that heat is evenly released and pressure accumulation is effectively alleviated.

[0030] However, the present invention is not limited thereto. In other embodiments, the communication port 211 may also be provided on other side walls of the condensing section 200 .

[0031] The movable plate 400 is sealed and installed at the opening on one side of the telescopic sleeve 300, and the sealing cover of the opening on the other side of the telescopic sleeve 300 is provided at all the connecting ports 211. That is to say, the sealing cover of the cover structure formed by the telescopic sleeve 300 and the movable plate 400 is provided at the connecting port 211, so that the cover structure, the condensation channel 210 and the evaporation chamber 110 are connected 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 bellows structure or a flexible film structure, wherein the bellows structure increases the telescopic stroke and deformation capacity through the transverse corrugation design, can maintain the sealing performance within a larger pressure range, and at the same time improves the durability of its own structure. One end of the telescopic sleeve 300 and the movable plate 400 can be sealed and bonded or connected by fasteners, and the other end of the telescopic sleeve 300 and the edge area of ​​the condensation section 200 are sealed and bonded or connected by fasteners.

[0032] One end of the stop frame 500 is welded or fixedly connected to the evaporator section 100 or the condenser section 200 via fasteners, and the other end is disposed on the side of the movable plate 400 facing away from the condenser section 200. Specifically, in one embodiment, the stop frame 500 covers the outer periphery of the telescopic sleeve 300 and the movable plate 400. Specifically, the stop frame 500 covers the outer periphery of the telescopic sleeve 300 and the movable plate 400. On the one hand, it can form a mechanical constraint. When the gaseous working medium pushes the movable plate 400 to move, the outer periphery of the stop frame 500 can limit radial deformation of the telescopic sleeve 300, preventing displacement between the telescopic sleeve 300 and the movable plate 400 due to pressure fluctuations. At the same time, the stop frame 500 prevents external foreign matter from damaging the telescopic sleeve 300 and the movable plate 400. In addition, the stop frame 500 is provided with a plurality of through holes 510 so that the wires of the pressure sensing element 600 can pass through the stop frame 500 through the through holes 510 . Moreover, during the movement of the movable plate 400 , the through holes 510 can serve as air intake and exhaust channels to reduce 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. The pressure sensing element 600 is mounted on a side of the stop frame 500 facing the movable plate 400 and spaced apart from the movable plate 400. Specifically, the pressure sensing element 600 can be bonded, welded, or connected to the stop frame 500 via fasteners. When the air pressure in the condensation channel 210 exceeds 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 away from the communication port 211 and abut against the pressure sensing element 600. When the air pressure in the condensation channel 210 is greater than or equal to a certain higher pressure value, that is, when the pressure value measured by the pressure sensing element 600 is greater than or equal to a first warning pressure value, the controller can control the power element 120 to reduce its power. Furthermore, 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. That is, the greater the pressure value measured by the pressure sensing element 600, the lower 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 calculated by the pressure value measured by the pressure sensor.

[0034] Specifically, in one embodiment, the controller can control the operating power of the power element 120 and the pressure value measured by the pressure sensing element 600 to form a linear functional 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 form a linear functional relationship. Specifically, this can be achieved through a preset linear algorithm or proportional adjustment module, which proportionally reduces the output of the power element 120 when the pressure value rises, thereby directly suppressing the generation rate of the gaseous working fluid. Among them, the controller refers to a control unit with data processing and signal output functions, which can be specifically implemented using an embedded microprocessor or a programmable logic controller. By receiving pressure data in real time and executing preset operation logic, it dynamically adjusts the operating state of the power element 120.

[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 twice the first warning pressure value, the controller adjusts the output power of the power element 120 to 25% of the initial power; and 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 ensures that the heat generated by the power element 120 always matches the vaporization rate of the working medium in the evaporation chamber 110, avoiding thermal shock caused by a sudden power drop. At the same time, the dynamic balance of the heat pipe heat exchange device is maintained through progressive power control.

[0036] Compared with the prior art, this solution starts linear power attenuation at the initial stage when the pressure begins to exceed the first warning pressure value, thereby maintaining the stability of the working medium circulation inside the heat pipe heat exchange device through smooth power regulation.

[0037] However, the present invention is not limited thereto. 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 inversely proportional functional relationship or other non-functional relationships, which are not listed here one by one.

[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 running, and the second warning pressure value is greater than the first warning pressure value.

[0039] Furthermore, the corresponding temperature and pressure expression association can be selected according to the selected working fluid 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. Moreover, for the sake of safety, the second warning pressure value is less than the air pressure value corresponding to the maximum temperature value.

[0040] Specifically, the relationship between temperature and pressure can be expressed using the ideal gas state equation: PV = nRT, where P is pressure, V is gas volume, n is the number of particles, T is temperature, and R is the Boltzmann constant. That is, the ideal gas state equation can be used to determine the relationship between the temperature and pressure of the gaseous working medium in the condensing channel 210. This equation can be used to determine the set first warning pressure value based on the actual first warning temperature value, and the set second warning pressure value based on the actual second warning temperature value. Experimental analysis shows that when the working medium is R134a refrigerant (tetrafluoroethane), the first warning temperature value is 50°C, the total volume is 2L, 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 2L, 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 working conditions where the gas pressure is less than 0.5 MPa.

[0042] Of course, when the pressure range is between 0.5 MPa and 3 MPa, to improve the conversion accuracy of temperature and pressure values, the temperature and pressure relationship can also be expressed using the van der Waals equation. Of course, when the gaseous working fluid is a non-polar or weakly polar gas or a mixture thereof, the temperature and pressure relationship can also be expressed using 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 fluid to vaporize, the gaseous working fluid flows to the connecting port 211 through the condensation channel 210. The pressure generated by the accumulation of the gaseous working fluid 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, 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 120 and forcibly interrupts the heat source. During the movement of the movable plate 400, the telescopic sleeve 300 remains sealed to prevent leakage of the working fluid. The spacing design 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 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 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 having a good pressure relief effect on the condensation channel 210. Moreover, since the condensation channel 210, the telescopic sleeve 300 and the movable plate 400 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 600 and the power element 120 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 a sealed state, effectively preventing leakage and loss of the working fluid.

[0045] Furthermore, it should be noted that the pressure sensing element 600 does not involve sealing issues. Specifically, since the cover structure, the condensation channel 210 and the evaporation chamber 110 are connected to form a closed structure, the working fluid will not leave the above-mentioned closed structure, and the pressure sensing element 600 is installed on the stop frame 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, 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.

[0046] In one 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. When the movable plate 400 and the pressure sensing element 600 are out of contact, the pressure sensing element 600 can be reset.

[0047] It should be noted that this type of pressure sensing element 600, which can measure pressure through contact and deform under pressure, is commonly referred to as an elastic pressure sensor or a mechanical sensor. Depending on their core operating principles and deformation methods, elastic pressure sensors include but are not limited to resistive strain gauges and capacitive pressure sensors.

[0048] Specifically, a resistance strain gauge works by attaching a strain gauge made of metal foil or semiconductor material to an elastomer (such as rubber or silicone). When pressure causes the elastomer to deform, the strain gauge also deforms (stretches or compresses), and its resistance changes accordingly. By measuring this resistance change using a circuit such as a Wheatstone bridge, the pressure can be inferred.

[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, the heat pipe heat exchange device also includes a first limiter 710, which is mounted on the side of the stop frame 500 facing the movable plate 400 and is spaced apart from the movable plate 400. Furthermore, the spacing between the first limiter 710 and the movable plate 400 is greater than the spacing between the pressure sensing element 600 and the movable plate 400. When the movable plate 400 abuts the first limiter 710, the pressure sensing element 600 cannot be further compressed, and the pressure value of the pressure sensing element 600 remains constant, allowing the controller to control the power element 120 to immediately stop operation. Furthermore, for safety reasons, when the movable plate 400 abuts the first limiter 710, the sum of the air pressure value within the condensing channel 210, the telescopic resistance of the telescopic 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 a hard material that is extremely difficult to compress, such as a metal block or a hard plastic block, and the first limiting portion 710 can be bonded, welded, or connected to the stop frame 500 via fasteners.

[0055] When the pressure of the gaseous working fluid rises, pushing the movable plate 400 away from the connection port 211, the movable plate 400 first contacts the pressure sensing element 600. At this point, the controller dynamically adjusts the operating power of the power element 120 based on the pressure value. If the pressure continues to rise and the movable plate 400 moves further to contact the first limiter 710, the controller directly shuts off the operation of the power element 120. This prevents system overpressure through pressure-stage control and a dual protection mechanism.

[0056] In one embodiment, if Figure 2 and Figure 3 As shown, the heat pipe heat exchange device also 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 connecting 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 toward the connecting port 211, so that the movable plate 400 can cover the connecting 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 connecting port 211. The preset pressure value can be between one standard atmospheric pressure and three standard atmospheric pressures (including the critical value). 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 may be a compression spring or a spring sheet structure, and a plurality of compression springs or spring sheet structures are evenly distributed on one side of the movable plate 400 .

[0058] With this arrangement, when the air pressure in the condensation channel 210 is low, the movable plate 400 rebounds and covers the communication port 211, thereby preventing the gaseous working medium from liquefying in the telescopic sleeve 300, thereby preventing the gaseous working medium from being retained in the telescopic sleeve 300, which is conducive to the condensation and reflux of the working medium.

[0059] Furthermore, in one embodiment, Figure 3 As shown, the heat pipe heat exchange device also includes a second stopper 720, which is installed (can be bonded, welded, or connected via fasteners) at the edge of the communication opening 211 of the condensing section 200. Specifically, it can be a solid area of ​​the condensing section 200 located between adjacent condensing channels 210, or a solid area at the end of the condensing section 200. When the movable plate 400 moves toward the communication opening 211, the second stopper 720 can stop the side of the movable plate 400 facing the communication opening 211, thereby preventing the movable plate 400 from directly contacting the communication opening 211 of the condensing section 200. In addition, by providing the second stopper 720, the movable plate 400 and the communication opening 211 of the condensing section 200 are spaced apart to form a balancing chamber. The balancing chamber can balance the gas pressure in different condensing channels 210, so that the gaseous working medium in the condensing channels 210 can be evenly distributed through the balancing chamber, thereby improving the heat dissipation uniformity throughout the condensing section 200.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0061] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

[0062] 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 device or element referred to 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.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise 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: The invention comprises an evaporation section (100), a condensation section (200), a telescopic sleeve (300), a movable plate (400), a stop frame (500), a pressure sensing element (600) and a controller, wherein the evaporation section (100) is provided with an evaporation chamber (110), the power element (120) is at least partially immersed in the liquid working medium of the evaporation chamber (110), the condensation section (200) is provided with a plurality of condensation channels (210) respectively connected to the evaporation chamber (110), the opening at one end of the condensation channel (210) is defined as a communication port (211), a sealing cover at one end of the telescopic sleeve (300) is provided at the plurality of communication ports (211), the movable plate (400) is sealingly assembled at one end of the telescopic sleeve (300) away from the communication port (211), one end of the stop frame (500) is fixedly connected to the condensation section (200), and the other end is provided on a side of the movable plate (400) facing away from the condensation section (200); The pressure sensing element (600) is installed on a side of the stop frame (500) facing the movable plate (400) and is spaced apart from the movable plate (400). The gaseous working medium can push the movable plate (400) to move in a direction away from the connecting 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 running. 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) is capable of moving in a direction away from the communication port (211) and compressing the pressure sensing element (600).

3. The heat pipe heat exchange device according to claim 2, characterized in that: The controller further comprises a first limiting portion (710), wherein the first limiting portion (710) is mounted on a side of the stop frame (500) facing the movable plate (400) and is spaced apart from the movable plate (400), wherein the spacing between the first limiting portion (710) and the movable plate (400) is greater than the spacing between the pressure sensing element (600) and the movable plate (400), and when the movable plate (400) abuts against the first limiting portion (710), the controller can control the power element (120) to stop running.

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: The invention also includes an elastic compression member (800), one end of which is connected to the side of the movable plate (400) facing away from the connecting port (211), and the other end of which 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 connecting port (211), so that the movable plate (400) can cover the connecting port (211).

6. The heat pipe heat exchange device according to claim 5, characterized in that: The invention also includes a second limiting portion (720), which is installed on the condensing section (200). When the movable plate (400) moves in a direction close to the connecting port (211), the second limiting portion (720) can stop at the side of the movable plate (400) facing the connecting port (211), and a balancing cavity can be formed between the movable plate (400) and the condensing section (200) to connect with each of the connecting ports (211).

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

8. The heat pipe heat exchange device according to claim 1, characterized in that: The controller is capable of controlling the operating power of the power element (120) and the pressure value measured by the pressure sensing element (600) to form a linear functional relationship.

9. The heat pipe heat exchange device according to claim 1, characterized in that: The stop frame (500) is provided on the outer peripheral side 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 a bellows structure.

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