Heat pipe performance testing device and method

Abstract

NOT VISIBLE DUE TO STATUS OF PATENT

Description

Heat pipe performance detection device and method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311713976.9, filed on December 13, 2023, entitled “Device and method for detecting performance of heat pipes,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of nuclear power technology, and in particular to a heat pipe performance detection device and method. Background Art

[0004] A heat pipe is a highly efficient passive heat transfer device. Its main advantage is that it can transfer heat under a small temperature gradient, and it has the advantages of high heat transfer efficiency, good isothermal performance and simple structure. A heat pipe is usually a closed tube or cylinder structure. There is a certain amount of working fluid inside the heat pipe, and a porous capillary wick is embedded on the inner surface of the heat pipe. The heat pipe structure is divided into a tube shell, a wick and a steam space from the outside to the inside in the radial direction; the heat pipe is divided into three parts along the axial direction: an evaporation section (heat absorption section), an adiabatic forging and a condensation section (cooling section). The working principle of the heat pipe is to use an external heat source to supply heat to the evaporation section. The heat will absorb heat and vaporize in the evaporation section, changing from a liquid working fluid to a vaporized working fluid, thereby generating a pressure difference between the evaporation section and the condensation section. The steam will flow to the condensation section under the action of the pressure difference. The vaporized working fluid releases the latent heat of vaporization to the cold source in the condensation section and re-condenses into a liquid working fluid. The capillary force of the wick causes the liquid working medium in the condensing section to flow back to the evaporating section, completing the cycle. This continuous cycle continuously transfers heat from the heat source to the cooling source. The capillary force of the wick can provide the maximum pressure difference between the vapor and liquid working medium, but since the capillary force of the wick has a limit, the sum of the pressure differences of the vapor and liquid in the heat pipe along the working medium flow direction must be less than the maximum capillary pressure difference.

[0005] Although heat pipes have a simple structure, they require extremely high manufacturing precision and are precision equipment. The performance of a heat pipe mainly depends on the performance of its internal wick. The wick provides capillary force and flow resistance for the operation of the heat pipe. The greater the capillary force and the smaller the flow resistance of the wick, the better the performance. The manufacturing and assembly process of heat pipe wicks with a length of more than two meters is currently immature in this field, so a special high-temperature heat pipe performance test bench is needed to measure the quality of high-temperature heat pipes. Currently, the performance test of high-temperature heat pipes usually adopts a pipe-by-pipe testing method, which makes the performance test of heat pipes time-consuming and labor-intensive. Therefore, the field urgently needs a device and method that can realize rapid batch measurement of heat pipe performance.

[0006] Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a heat pipe performance detection device and method, which can simultaneously realize rapid detection of the heat transfer performance of high-temperature heat pipes, save detection time and improve detection efficiency.

[0008] A first aspect of the present invention provides a heat pipe performance testing device, comprising: a base; a support rod, which is arranged on the base; a rotatable heating furnace, which is arranged on the support rod and is used to accommodate and heat one or more heat pipes to be tested; an angle fixing mechanism, which is connected to the heating furnace and is used to fix the heating furnace at a predetermined angle; an angle measuring component, which is arranged on the heating furnace and is used to measure the angle of the heating furnace relative to a reference surface; and a plurality of thermocouples, which are distributed on the surface of the heat pipe to be tested and are used to measure the temperatures of the evaporation section, the insulation section and the condensation section of the heat pipe.

[0009] Preferably, the heating furnace is connected to the support rod via a rotating shaft.

[0010] Preferably, the heating furnace includes a box body, a box cover, multiple isolation blocks and multiple heating rods. The multiple isolation blocks are used to carry the heat pipes to be tested and are arranged at intervals in the box body to separate the box body into multiple sections. The multiple sections include an evaporation section, and the multiple heating rods are distributed at least in the evaporation section.

[0011] Preferably, positions of the plurality of isolation blocks in the box body can be adjusted.

[0012] Preferably, the angle fixing mechanism includes a fixed support rod and a locking piece, the fixed support rod is fixed on the base and has a long slot, and the locking piece passes through the long slot and can be locked with the heating furnace.

[0013] Preferably, the angle measuring component is a level or an angle sensor.

[0014] Preferably, the heat pipe performance detection device further comprises a console connected to the plurality of thermocouples, the angle measurement component and the heating furnace, and the console is configured as follows:

[0015] Turn on the heating rod corresponding to the evaporation section to heat the evaporation section of each heat pipe to be tested;

[0016] Record the evaporation section temperature and condensation section temperature of each heat pipe to be tested at multiple times;

[0017] Determine whether the startup performance of the heat pipe to be tested is qualified based on the evaporation section temperature and the condensation section temperature;

[0018] Adjust the angle of the heating furnace so that the condensing section of each heat pipe to be tested is lower than the evaporating section, and record the temperature of the evaporating section of the heat pipe to be tested when the heating furnace is at multiple set tilt angles;

[0019] When the temperature change rate of the evaporation section of each heat pipe to be tested exceeds a predetermined value, the heating rod is turned off and the tilt angle of the heating furnace is recorded; and

[0020] The capillary heat transfer limit of the heat pipe to be tested is calculated according to the inclination angle.

[0021] A second aspect of the present invention provides a heat pipe performance testing method, which uses the heat pipe performance testing device provided by the first aspect of the present invention to test the heat pipe to be tested, comprising the following steps:

[0022] The heat pipe to be inspected is placed in a heating furnace and the evaporation section of the heat pipe to be inspected is heated;

[0023] Record the evaporation section temperature and condensation section temperature of the heat pipe to be tested at multiple times;

[0024] Determine whether the startup performance of the heat pipe to be tested is qualified based on the evaporation section temperature and the condensation section temperature;

[0025] After the heat pipe is started, the angle of the heating furnace is gradually adjusted so that the condensing section of the heat pipe to be tested is lower than the evaporating section, and the temperature of the evaporating section of the heat pipe to be tested is recorded when the heating furnace is at multiple set tilt angles;

[0026] When the temperature change rate of the evaporation section of each heat pipe to be tested exceeds a first predetermined value, turning off the heating rod and recording the inclination angle of the heating furnace; and

[0027] The capillary heat transfer limit of the heat pipe to be tested is calculated according to the inclination angle.

[0028] Preferably, the step of placing the heat pipe to be tested in the heating furnace includes: placing the heat pipe to be tested on multiple isolation blocks arranged at intervals, and adjusting the positions of the multiple isolation blocks according to the lengths of the evaporation section, insulation section and condensation section of the heat pipe to be tested.

[0029] Preferably, the step of judging whether the heat pipe startup performance is qualified based on the evaporation section temperature and the condensation section temperature includes: judging whether the temperature at the end of the condensation section of the heat pipe to be tested exceeds the heat pipe startup transition temperature, and whether the temperature difference with the evaporation section is less than a second predetermined value.

[0030] Preferably, the step of calculating the capillary heat transfer limit of the heat pipe to be tested according to the tilt angle includes:

[0031] Calculate the capillary pressure head of the heat pipe to be tested according to the inclination angle;

[0032] The capillary heat transfer limit of the heat pipe to be tested is calculated based on the capillary pressure head of the heat pipe to be tested.

[0033] Preferably, the formula for calculating the capillary pressure head of the heat pipe to be tested according to the tilt angle is:

[0034] in, is the capillary pressure head, is the gravity pressure head, ρ is the density of the liquid working medium of the heat pipe to be tested, L eff is the effective length of the heat pipe to be tested; is the tilt angle.

[0035] The present invention provides a heating furnace capable of accommodating the heat pipe to be tested and an angle measurement component, and calculates the capillary heat transfer limit of the heat pipe to be tested by the inclination angle of the heating furnace. This can simultaneously realize rapid testing of the heat transfer performance of one or more high-temperature heat pipes, saving testing time and improving testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application.

[0037] FIG1 is a schematic structural diagram of a heat pipe performance detection device according to a specific embodiment of the present invention;

[0038] FIG2 is a schematic structural diagram of a heating furnace in a heat pipe performance testing device according to a specific embodiment of the present invention;

[0039] FIG3 is a schematic structural diagram of an isolation block in a heat pipe performance detection device according to a specific embodiment of the present invention;

[0040] FIG4 is a schematic flow chart of a heat pipe performance detection method according to a specific embodiment of the present invention.

[0041] Figure 1: 10-heat pipe performance testing device; 101-base; 102-support rod; 103-heating furnace; 1031-heat pipe to be tested; 1032-box; 1033-box cover; 1034-isolating block; 1035-heating rod; 1036-circular hole; 104-angle fixing mechanism; 1041-fixed support rod; 1042-locking member; 1043-long slot; 105-angle measuring component; 106-rotating shaft; 20-heat pipe performance testing method. DETAILED DESCRIPTION

[0042] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0043] FIG1 is a schematic structural diagram of a heat pipe performance detection device according to a specific embodiment of the present invention.

[0044] As shown in Figure 1, the heat pipe performance testing device 10 (hereinafter referred to as "device 10") of this embodiment includes a base 101, a support rod 102, and a heating furnace 103. The support rod 102 is mounted on the base 101, and the heating furnace 103 is rotatably mounted on the support rod 102. As an example, the heating furnace 103 is connected to the support rod 102 via a rotating shaft 106. The heating furnace 103 is used to accommodate and heat one or more heat pipes 1031 to be tested.

[0045] The device 10 further includes an angle fixing mechanism 104 , which is connected to the heating furnace 103 and is used to fix the heating furnace 103 at a predetermined angle.

[0046] The apparatus 10 further includes an angle measuring component 105 disposed on the heating furnace 103 for measuring the angle of the heating furnace 103 relative to a reference plane. The reference plane is a pre-set reference plane, illustratively a horizontal plane. The angle measuring component 105 may be a level or an angle sensor.

[0047] The apparatus 10 also includes a plurality of thermocouples (not shown) distributed across the surface of the heat pipe 1031 to be inspected. Preferably, the thermocouples are evenly distributed across the heat pipe 1031 to be inspected, primarily for measuring the axial temperature distribution of the evaporation, adiabatic, and condensation sections of the heat pipe 1031 to be inspected. Preferably, an insulation layer (not shown) can also be provided within the heating furnace 103 to reduce heat dissipation from the heat pipe 1031 to be inspected.

[0048] When testing the heat pipe 1031 to be tested, the device 10 places the heat pipe 1031 in the heating furnace 103 and heats the evaporation section of the heat pipe 1031. The heating furnace 103 is adjusted to a horizontal position and locked in this position using the angle fixing mechanism 104. The temperature control temperature of the heating furnace 103 is then adjusted to the designed operating temperature of the heat pipe 1031 to be tested, causing the temperatures of the evaporation section, the adiabatic section, and the condensation section to gradually increase. Thermocouples installed in the evaporation section, the adiabatic section, and the condensation section of each heat pipe 1031 to be tested monitor the temperature changes at various locations on the heat pipe 1031 to be tested. The evaporation section temperature and the condensation section temperature of the heat pipe 1031 to be tested are recorded at multiple times, and the temperature difference between the evaporation section and the condensation section is monitored. The startup performance of the heat pipe 1031 to be tested is determined based on the evaporation section temperature and the condensation section temperature. The angle measuring component 105 and the angle fixing mechanism 104 are used to gradually adjust the inclination angle of the heating furnace 103 so that the condensation section of the heat pipe 1031 to be tested is lower than the evaporation section. The temperature of the evaporation section of the heat pipe 1031 to be tested is recorded when the heating furnace 103 is at multiple set inclination angles. When the temperature change rate of the evaporation section of each heat pipe 1031 to be tested exceeds a first predetermined value, the heating furnace 103 is turned off and the inclination angle of the heating furnace 103 is recorded. For example, the first predetermined value can be 5°C / s. The capillary heat transfer limit of the heat pipe 1031 to be tested is calculated based on the inclination angle.

[0049] The heat pipe performance testing device 10 of the present invention heats multiple heat pipes 1031 to be tested to operating temperature and then simultaneously monitors the temperature difference between the condensing section and the evaporating section of each heat pipe 1031 to test, thereby testing the startup performance of each heat pipe 1031. After the heat pipes 1031 are started, the heating furnace 103 is tilted so that the condensing section of each heat pipe 1031 tilts downward. When the tilt reaches a certain level, the heat pipe 1031 cannot operate normally due to insufficient capillary force, and the temperature of the evaporating section of each heat pipe 1031 rises rapidly. At this point, the capillary heat transfer limit of each heat pipe 1031 is calculated based on the tilt angle, thereby obtaining the maximum heat transfer capacity of each heat pipe 1031, thereby achieving the purpose of rapid batch performance testing of multiple heat pipes.

[0050] FIG2 is a schematic structural diagram of a heating furnace 103 in a heat pipe performance testing device 10 according to a specific embodiment of the present invention.

[0051] As shown in Figure 2, the heating furnace 103 includes a housing 1032, a housing cover 1033, a plurality of isolation blocks 1034, and a plurality of heating rods 1035. In this embodiment, the heating furnace 103 includes three isolation blocks 1034, which are spaced apart within the housing 1032 to separate the housing 1032 into an evaporation section L1, an insulation section L2, and a condensation section L3. The position of the isolation blocks 1034 within the housing 1032 can be adjusted, thereby adjusting the length of the evaporation section L1 to accommodate heat pipes 1031 with different evaporation section lengths.

[0052] FIG3 is a schematic structural diagram of the isolation block 1034 in the heat pipe performance detection device 10 according to a specific embodiment of the present invention.

[0053] 3 , in one embodiment, the isolation block 1034 is provided with a plurality of circular holes 1036. The heat pipe 1031 to be tested can be placed through the circular holes 1036 in the isolation block 1034, so that the isolation block 1034 can be used to support the heat pipe 1031 to be tested.

[0054] Multiple heating rods 1035 are distributed at least throughout the evaporation section L1 to provide a heat source for the evaporation section of the heat pipe 1031 to be tested. Preferably, the heating rods 1035 can be distributed from one end of the housing 1032 to the other, ensuring that when the length of the evaporation section L1 is adjusted as needed, the heating rods 1035 can cover and heat the entire evaporation section L1.

[0055] The heat pipe performance testing device 10 can simultaneously test multiple high-temperature heat pipes 1031 , and can test the performance of heat pipes with different specifications and parameters by changing the positions of multiple isolation blocks 1034 or using isolation blocks 1034 with different apertures.

[0056] As shown in Figure 1, the angle fixing mechanism 104 includes a fixed support rod 1041 and a locking member 1042. The fixed support rod 1041 is fixed to the base 101 and has an elongated slot 1043. The locking member 1042 is adapted to pass through the elongated slot 1043, move up and down along the elongated slot 1043, and can be locked with the heating furnace 103. When the locking member 1042 is locked with the heating furnace 103, the tilt angle of the heating furnace 103 is fixed. In another embodiment, the angle fixing mechanism 104 can be an electrically driven mechanism, such as a motor, which can drive the heating furnace 103 to rotate and lock it at a specific angle.

[0057] By adjusting the inclination angle of the heat pipe 1031 to be tested, the condensing section of the heat pipe 1031 to be tested is made lower than the evaporating section. By continuously increasing the inclination angle, the temperature of the evaporating section of the heat pipe 1031 to be tested is caused to soar, and the heat pipe 1031 to be tested fails. The capillary pressure head of the heat pipe 1031 to be tested is obtained by analysis and calculation, and the capillary heat transfer limit of the heat pipe 1031 to be tested is calculated, thereby realizing rapid detection of the heat transfer capacity of the heat pipe.

[0058] The device 10 also includes a control console (not shown), which is connected to multiple thermocouples, the angle measurement component 105, and the heating furnace 103 and is configured to: turn on the heating rod 1035 corresponding to the evaporation section L1 of the heating furnace 103 to heat the evaporation section of each heat pipe 1031 to be tested; record the temperature of the evaporation section L1 and the temperature of the condensation section L2 of each heat pipe 1031 to be tested at multiple times; determine whether the startup performance of the heat pipe 1031 to be tested is qualified based on the evaporation section temperature and the condensation section temperature; adjust the angle of the heating furnace 103 so that the condensation section of each heat pipe 1031 to be tested is lower than the evaporation section, and record the temperature of the evaporation section of the heat pipe 1031 to be tested when the heating furnace 103 is at multiple set inclination angles; when the temperature change rate of the evaporation section of each heat pipe 1031 to be tested exceeds a first predetermined value, turn off the heating rod 1035 and record the inclination angle of the heating furnace 103; and calculate the capillary heat transfer limit of the heat pipe 1031 to be tested based on the inclination angle.

[0059] FIG4 is a schematic flow chart of a heat pipe performance detection method according to a specific embodiment of the present invention.

[0060] As shown in Figure 4, this embodiment provides a heat pipe performance testing method 20 (hereinafter referred to as "method 20") applicable to the device 10. The method 20 includes steps S1 to S6.

[0061] Specifically, step S1 includes placing the heat pipe 1031 to be tested in the heating furnace 103 and heating the evaporation section of the heat pipe 1031 to be tested. Specifically, the heat pipe 1031 to be tested is placed on a plurality of spaced-apart isolation blocks 1034, and the positions of the isolation blocks 1034 are adjusted according to the lengths of the evaporation section, insulation section, and condensation section of the heat pipe 1031 to be tested. After step S1 and before proceeding to step S2, the heating furnace 103 needs to be adjusted to a horizontal position and locked in this position using a locking member 1042. The temperature control temperature of the heating furnace 103 is then adjusted to the designed operating temperature of the heat pipe 1031 to be tested, so that the temperatures of the evaporation section, insulation section, and condensation section gradually increase.

[0062] Then, proceed to step S2. Step S2 includes recording the evaporation and condensation temperatures of the heat pipe 1031 under test at multiple times and monitoring the temperature difference between the evaporation and condensation sections. Specifically, thermocouples can be installed in the evaporation, insulation, and condensation sections of each heat pipe 1031 under test to monitor temperature changes at various locations within the heat pipe 1031 under test.

[0063] Then proceed to step S3, which includes judging whether the startup performance of the heat pipe 1031 to be tested is qualified based on the temperature of the evaporating section and the temperature of the condensing section. The specific steps are to judge whether the temperature at the very end of the condensing section of the heat pipe 1031 to be tested exceeds the heat pipe startup transition temperature, and whether the temperature difference with the evaporating section is less than the second predetermined value. If the temperature at the very end of the condensing section of the heat pipe 1031 to be tested exceeds the heat pipe startup transition temperature, and the temperature difference with the evaporating section is less than the second predetermined value, it indicates that the heat pipe 1031 to be tested can be started in a cold state and the startup performance is qualified. Exemplarily, the second predetermined value can be 15°C. If the temperature at the very end of the condensing section of the heat pipe 1031 to be tested does not exceed the heat pipe startup transition temperature, or the temperature difference with the evaporating section is greater than the second predetermined value, it indicates that the heat pipe 1031 to be tested cannot be started and the startup performance is unqualified.

[0064] Next, step S4 is performed. Step S4 includes using the angle measurement component 105 and the locking member 1042 to gradually adjust the inclination angle of the heating furnace 103 so that the condensing section of the heat pipe 1031 to be tested is lower than the evaporating section. The temperature of the evaporating section of the heat pipe 1031 to be tested is recorded when the heating furnace 103 is at multiple set inclination angles. Preferably, the temperature changes at various locations on the heat pipe 1031 to be tested are observed every 1° adjustment. Because the liquefied working fluid in the wick in the condensing section needs to overcome gravity to flow back to the evaporating section under the action of capillary force, the gravity required to overcome by the working fluid to flow back increases as the inclination angle of the heating furnace 103 increases. When the inclination angle reaches a certain angle, the maximum capillary force of the heat pipe 1031 will be less than or equal to gravity, preventing the liquid from flowing back. Consequently, the insufficient capillary force will cause the heat pipe 1031 to malfunction, and the temperature of the evaporating section will increase significantly within a short period of time.

[0065] Then, step S5 is performed, which includes turning off the heating rod 1035 and recording the tilt angle of the heating furnace 103 when the temperature change rate of the evaporation section of each heat pipe 1031 to be tested exceeds a first predetermined value. For example, the first predetermined value may be 5° C. / s.

[0066] Step S6 includes calculating the capillary heat transfer limit of the heat pipe 1031 to be tested according to the tilt angle. The specific step is to use the following formula to calculate the capillary pressure head of the heat pipe 1031 to be tested according to the tilt angle:

[0067] in, is the capillary pressure head, is the gravity pressure head, ρ is the density of the liquid working medium of the heat pipe 1031 to be tested, L eff Indicates the effective length of the heat pipe to be tested, which can generally be expressed as L E is the length of the heat pipe evaporation section, L A is the length of the heat pipe insulation section, L C is the length of the heat pipe condensation section; is the tilt angle, which is the angle between the heat pipe to be tested and the horizontal plane during operation.

[0068] After calculating the capillary pressure head, the capillary heat transfer limit of the heat pipe 1031 to be tested is calculated based on the capillary pressure head of the heat pipe 1031 to be tested and combined with the following formula to obtain the maximum heat transfer capacity of the heat pipe 1031 to be tested.

[0069]

[0070] Among them, Q C is the capillary heat transfer limit of the heat pipe 1031 to be tested, σ is the surface tension of the liquid, r c is the capillary radius, F l and F v are the friction coefficients of liquid and steam, respectively. ρ is the density of the liquid working medium of the heat pipe 1031 to be tested, L is the total length of the heat pipe, and g is the acceleration due to gravity.

[0071] The heat pipe performance testing device 10 and method 20 of the present invention, by providing a heating furnace 103 capable of accommodating the heat pipe 1031 to be tested and providing an angle measurement component 105, calculates the capillary heat transfer limit of the heat pipe 1031 to be tested by the inclination angle of the heating furnace 103, and can simultaneously realize rapid testing of the heat transfer performance of one or more high-temperature heat pipes, thereby saving testing time and improving testing efficiency.

[0072] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A heat pipe performance detection device, comprising: Base; A support rod, which is arranged on the base; A heating furnace, which is arranged on the support rod and can rotate relative to the support rod, and is used to accommodate and heat one or more heat pipes to be tested; An angle fixing mechanism, connected to the heating furnace, for fixing the heating furnace at a predetermined angle; An angle measuring component, which is arranged on the heating furnace and is used to measure the angle of the heating furnace relative to a reference surface; as well as A plurality of thermocouples are distributed on the surface of the heat pipe to be detected and are used to measure the temperatures of the evaporation section, the insulation section and the condensation section of the heat pipe.

2. The heat pipe performance detection device according to claim 1, characterized in that: The heating furnace is connected to the supporting rod via a rotating shaft.

3. The heat pipe performance detection device according to claim 1, characterized in that: The heating furnace includes a box body, a box cover, a plurality of isolation blocks and a plurality of heating rods. The plurality of isolation blocks are used to carry the heat pipe to be tested and are arranged in the box body at intervals to separate the box body into a plurality of sections. The plurality of sections include an evaporation section. The plurality of heating rods are distributed at least in the evaporation section.

4. The heat pipe performance detection device according to claim 3, characterized in that: The positions of the plurality of isolation blocks in the box body can be adjusted.

5. The heat pipe performance detection device according to claim 1, characterized in that: The angle fixing mechanism comprises a fixed support rod and a locking piece. The fixed support rod is fixed on the base and has a long slot. The locking piece passes through the long slot and can be locked with the heating furnace.

6. The heat pipe performance detection device according to claim 1, characterized in that: The angle measuring component is a level or an angle sensor.

7. The heat pipe performance detection device according to claim 3, characterized in that: The device further comprises a console, which is connected to the plurality of thermocouples, the angle measuring component and the heating furnace, and the console is configured as follows: Turn on the heating rod corresponding to the evaporation section to heat the evaporation section of each heat pipe to be tested; Record the evaporation section temperature and condensation section temperature of each heat pipe to be tested at multiple times; Judging whether the startup performance of the heat pipe to be tested is qualified according to the evaporation section temperature and the condensation section temperature; Adjusting the angle of the heating furnace so that the condensation section of each heat pipe to be tested is lower than the evaporation section, and recording the temperature of the evaporation section of the heat pipe to be tested when the heating furnace is located at a plurality of set inclination angles; When the temperature change rate of the evaporation section of each heat pipe to be tested exceeds a predetermined value, the heating rod is turned off and the inclination angle of the heating furnace is recorded; and The capillary heat transfer limit of the heat pipe to be tested is calculated according to the inclination angle.

8. A heat pipe performance detection method, using the heat pipe performance detection device as claimed in claim 1 to detect the heat pipe to be detected, comprising the following steps: Placing the heat pipe to be tested in a heating furnace and heating the evaporation section of the heat pipe to be tested; Recording the evaporation section temperature and the condensation section temperature of the heat pipe to be tested at multiple times; Judging whether the startup performance of the heat pipe to be tested is qualified according to the evaporation section temperature and the condensation section temperature; After the heat pipe to be detected is started, the angle of the heating furnace is gradually adjusted so that the condensing section of the heat pipe to be detected is lower than the evaporating section, and the temperature of the evaporating section of the heat pipe to be detected is recorded when the heating furnace is at a plurality of set tilt angles; When the temperature change rate of the evaporation section of each heat pipe to be detected exceeds a first predetermined value, turning off the heating rod of the heating furnace and recording the inclination angle of the heating furnace; and The capillary heat transfer limit of the heat pipe to be tested is calculated according to the inclination angle.

9. The heat pipe performance detection method according to claim 8, characterized in that: The step of placing the heat pipe to be tested in the heating furnace includes: placing the heat pipe to be tested on a plurality of isolation blocks arranged at intervals, and adjusting the positions of the plurality of isolation blocks according to the lengths of the evaporation section, the insulation section and the condensation section of the heat pipe to be tested.

10. The heat pipe performance detection method according to claim 8, characterized in that: The step of judging whether the startup performance of the heat pipe to be tested is qualified according to the evaporation section temperature and the condensation section temperature includes: judging whether the temperature of the end of the condensation section of the heat pipe to be tested exceeds the heat pipe startup transition temperature, and whether the temperature difference with the evaporation section is less than a second predetermined value.

11. The heat pipe performance detection method according to claim 8, characterized in that: The step of calculating the capillary heat transfer limit of the heat pipe to be tested according to the inclination angle comprises: Calculating the capillary pressure head of the heat pipe to be tested according to the inclination angle; The capillary heat transfer limit of the heat pipe to be detected is calculated according to the capillary pressure head of the heat pipe to be detected.

12. The heat pipe performance detection method according to claim 11, characterized in that: The formula for calculating the capillary pressure head of the heat pipe to be tested according to the inclination angle is: in, is the capillary pressure head, is the gravity pressure head, ρ is the density of the liquid working medium of the heat pipe to be tested, L eff is the effective length of the heat pipe to be tested; is the tilt angle.