Test device and method for testing power generation performance of temperature difference device after irradiation treatment

Abstract

The embodiment of the application relates to the field of test devices for electrical performance, in particular to a test device and method suitable for testing the power generation performance of a temperature difference device after irradiation treatment. The test device provided by the embodiment of the application can adjust the temperature of the hot end and the cold end of the temperature difference device respectively through the mutual cooperation between the heat source assembly, the movable cold source assembly, the vacuum container, the moving matching piece and the driving assembly, thereby reducing the loss of cold and heat. The driving assembly drives the movable cold source assembly to adjust the temperature of the cold end of the temperature difference device and the pressure of the cold end and the hot end of the temperature difference device. The device is convenient for taking and placing the temperature difference device after irradiation, can be separated from the reactor, can test the temperature difference device after irradiation treatment, and keeps the device sealed during the test process. Therefore, the test efficiency of the electrical performance of the temperature difference device is improved, the test conditions can be flexibly adjusted according to actual needs, pollution and leakage are avoided during the test process, and the irradiation harm is reduced.

Description

Technical Field

[0001] The embodiments of this application relate to the field of electrical performance testing apparatus, and particularly to a testing apparatus and method suitable for testing the power generation performance of irradiated thermoelectric devices. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] Thermoelectric power generation is a static thermoelectric conversion technology that can directly convert heat energy into electrical energy. It is based on the Seebeck effect, which states that when two different conductors (or semiconductors) are connected to form a circuit and there is a temperature difference between the two connection points, an electromotive force (voltage) is generated in the circuit, thereby forming a current in the closed circuit.

[0004] Thermoelectric devices can generate electricity using various forms of waste heat without involving combustion, emitting no greenhouse gases or harmful gases, making them environmentally friendly. Furthermore, their simple structure and compact size facilitate movement and deployment, making them suitable for various heat source scenarios. In the context of sustainable energy development, it is necessary to test the performance of thermoelectric devices to promote their application. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] One aspect of this application provides a testing apparatus suitable for testing the power generation performance of a thermoelectric device after irradiation treatment. The testing apparatus includes a heat source component, a movable cold source component, a vacuum enclosure, a movable mating component, and a drive component. The heat source component is configured to heat the hot end of the thermoelectric device, and the movable cold source component is configured to cool the cold end of the thermoelectric device. The heat source component and the movable cold source component are disposed in the vacuum enclosure. The movable mating component is configured to maintain a seal between the movable cold source component and the vacuum enclosure when the movable cold source component moves. The drive component is configured to drive the movable cold source component to move, so that the movable cold source component cools the cold end of the thermoelectric device, or does not cool it. The drive component is also configured to be able to test the pressure at the cold end and the hot end of the thermoelectric device.

[0007] The testing apparatus provided in this application, through the cooperation of a heat source component, a movable cold source component, a vacuum containment component, a movable mating component, and a drive component, enables the temperature of the hot and cold ends of the thermoelectric device to be adjusted separately, reducing heat loss. The drive component drives the movable cold source component to adjust the temperature of the cold end of the thermoelectric device and the pressure at both the hot and cold ends. The apparatus facilitates the handling of irradiated thermoelectric devices, allowing for testing of irradiated devices detached from the reactor while maintaining a sealed design during testing. This improves the efficiency of testing the electrical performance of thermoelectric devices, allows for flexible adjustment of testing conditions according to actual needs, avoids contamination and leakage during testing, and reduces radiation hazards.

[0008] Another aspect of the embodiments of this application provides a method for testing the power generation performance of an irradiated thermoelectric device, which employs the aforementioned testing apparatus and includes the following steps: S10, obtaining the irradiated thermoelectric device; S20, placing the thermoelectric device into the vacuum containment of the testing apparatus; S30, inputting a corresponding coolant into the cooling component of the mobile cold source assembly of the testing apparatus according to the testing requirements of the thermoelectric device; S40, heating the hot end of the thermoelectric device using the heat source assembly of the testing apparatus, and cooling the cold end of the thermoelectric device using the mobile cold source assembly of the testing apparatus, driven by the drive assembly of the testing apparatus and in cooperation with the moving cooperating component of the testing apparatus, to test the power generation performance of the irradiated thermoelectric device; S50, removing the thermoelectric device after the test in step S40 from the vacuum containment of the testing apparatus, and adjusting and repeating steps S10-S40 according to the test results obtained in step S40 and new test requirements. Attached Figure Description

[0009] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The drawings, together with the following detailed description, are included in and form a part of this specification. Elements having the same function and structure are indicated by the same reference numerals. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0010] Figure 1 This is a schematic diagram showing the assembly of the various components of the testing device provided in the embodiments of this application.

[0011] Explanation of reference numerals in the attached figures: 1. Testing equipment; 10. Heat source assembly; 11. Supporting component; 12. Heat-conducting component; 13. Heating component; 20. Cold source components; 21. Cooling components; 22. Transmission components; 30. Vacuum containment components; 40. Moving mating parts; 50. Drive assembly; 51. Drive component; 52. Pressure measuring component; 60. Insulating components; 70. Resistance-reducing components; 2. Temperature difference devices. Detailed Implementation

[0012] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0013] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0014] The following disclosure provides several different implementations or examples for carrying out this application. To simplify the disclosure of this application, specific examples of components and methods are described below. Of course, these are merely examples and are not intended to limit this application. In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0015] In related technologies, utilizing thermoelectric devices to recover waste heat from reactors for power generation is a development trend for expanding the application scenarios of thermoelectric power generation. However, since thermoelectric devices need to operate under irradiation, and contain industrially integrated power generation units, their power generation performance is affected by the irradiation environment. Therefore, it is necessary to test the power generation performance of thermoelectric devices under irradiation and evaluate its impact to promote the improvement of thermoelectric power generation technology. Currently, existing irradiation devices for thermoelectric devices cannot simulate the actual irradiation environment of a reactor, and the performance data of thermoelectric materials suitable for reactors but not used for power generation cannot represent the performance of thermoelectric devices used for power generation. There is a lack of technical means to effectively test the power generation performance of thermoelectric devices treated under irradiation.

[0016] To address the aforementioned technical problems, one embodiment of this application provides a testing device suitable for testing the power generation performance of thermoelectric devices after irradiation treatment. Figure 1This is a schematic diagram showing the assembled components of the testing device provided in the embodiments of this application, as shown below. Figure 1 As shown, the test device 1 includes: a heat source assembly 10, a movable cold source assembly 20, a vacuum container 30, a movable mating component 40, and a drive assembly 50.

[0017] The heat source assembly 10 is configured to heat the hot end of the temperature difference device 2, and the movable cold source assembly 20 is configured to cool the cold end of the temperature difference device 2; the heat source assembly 10 and the movable cold source assembly 20 are disposed in the vacuum container 30; the movable mating part 40 is configured to keep the movable cold source assembly 20 sealed to the vacuum container 30 when the movable cold source assembly 20 moves; the drive assembly 50 is configured to drive the movable cold source assembly 20 to move, so that the movable cold source assembly 20 cools the cold end of the temperature difference device 2, or does not cool it; the drive assembly 50 is also configured to be able to test the pressure of the cold end and the hot end of the temperature difference device 2.

[0018] The testing device 1, through the cooperation of the heat source component 10, the mobile cold source component 20, the vacuum containment component 30, the moving mating component 40, and the drive component 50, enables the temperatures of the hot and cold ends of the thermoelectric device 2 to be adjusted separately without interference, reducing heat loss. The drive component 50 drives the mobile cold source component 20 to move, adjusting the temperature of the cold end of the thermoelectric device 2 and the pressure of the cold and hot ends of the thermoelectric device 2. The device facilitates the handling of the irradiated thermoelectric device 2, allowing it to be removed from the reactor for testing, while maintaining a sealed environment during testing. This improves the efficiency of testing the electrical performance of the thermoelectric device 2, allows for flexible adjustment of test conditions according to actual needs, avoids contamination leakage during testing, and reduces radiation hazards.

[0019] In some embodiments, such as Figure 1 As shown, the heat source assembly 10 includes: a support member 11, a heat-conducting member 12, and a heating member 13; the heat-conducting member 12 is fixedly disposed on the support member 11, and the support member 11 is fixedly disposed on the vacuum containment member 30; the heat-conducting member 12 is configured to conduct the heat generated by the heating member 13 to the hot end of the temperature difference device 2, so as to heat the hot end of the temperature difference device 2; the heat-conducting member 12 is configured to make the temperature of the hot end of the temperature difference device 2 uniform.

[0020] In such an embodiment, specifically, the support member 11 can be a gantry frame; the heat-conducting member 12 forms a hollow structure for setting the heating member 13, which can be a heating rod. The heating rod is connected to an external power supply, and the temperature of the heating rod is controlled by adjusting the power of the external power supply according to the type of temperature difference device 2 and the different test conditions.

[0021] In such an embodiment, the heat-conducting element 12 may also have several small holes for arranging thermocouples. The thermocouples are used to measure the temperature of the heat-conducting element 12, representing the temperature of the hot end of the temperature difference device 2.

[0022] In such an embodiment, in order to ensure the temperature uniformity of the hot end of the thermoelectric device 2, the area of ​​the heat-conducting element 12 should preferably be more than 20 times the end face area of ​​the hot end of the thermoelectric device 2.

[0023] In this embodiment, a heat-conducting component 12 is provided to conduct the heat generated by the heating component 13 to the hot end of the thermoelectric device 2, thereby heating the hot end of the thermoelectric device 2. The heat-conducting component 12 ensures uniform temperature at the hot end of the thermoelectric device 2, resulting in more even heating and improved test reliability. Furthermore, the heat-conducting component 12 is fixedly mounted on the support component 11, and the support component 11 is fixedly mounted on the vacuum container 30, providing a mechanical connection between the heat source assembly 10 and the vacuum container 30. This makes the structure of the testing device 1 more stable, reduces disassembly and assembly procedures, and thus improves the convenience of testing.

[0024] In some embodiments, such as Figure 1 As shown, the mobile cold source assembly 20 includes a cooling element 21 and a transmission element 22. The cooling element 21 is configured to allow coolant to flow through it. The transmission element 22 is configured to, under the drive of the drive assembly 50, move the cooling element 21 to contact or move away from the cold end of the temperature difference device 2, so that the cooling element 21 cools the cold end of the temperature difference device 2 or does not cool it. The cooling element 21 and the transmission element 22 are disposed in the vacuum container 30. When the transmission element 22 moves the cooling element 21, it maintains a seal with the vacuum container 30 through the moving mating part 40.

[0025] In this embodiment, specifically, the cooling element 21 can be a coolant flow pipe, and the type of coolant can be selected according to the type of thermoelectric device 2 and the irradiation treatment conditions. During the power generation performance test of the thermoelectric device 2, it is necessary to adjust the temperature of the cold end of the thermoelectric device 2, but its cold end temperature usually does not exceed 400°C. In this case, heat transfer oil can be selected as the coolant. If it is necessary to adjust the cold end temperature to above 400°C, a thermal resistance block can be added between the cooling element 21 and the cold end of the thermoelectric device 2 to increase the temperature of the cold end of the thermoelectric device 2.

[0026] In such an embodiment, several small holes may be opened on the cooling element 21 and the thermal resistance block for arranging thermocouples. The thermocouples are used to measure the temperature of the cooling element 21, indicating the temperature of the cold end of the temperature difference device 2.

[0027] In such an embodiment, in order to ensure the uniformity of the temperature at the cold end of the temperature difference device 2, the area of ​​the cooling element 21 should preferably be more than 20 times the end face area of ​​the cold end of the temperature difference device 2.

[0028] In this embodiment, a cooling element 21 is provided for the flow of coolant. Driven by the drive assembly 50, the transmission element 22 moves the cooling element 21 to contact or move away from the cold end of the temperature difference device 2, allowing the cooling element 21 to cool the cold end of the temperature difference device 2, or not to cool it. When cooling, testing is performed; when not cooling, the composition and flow rate of the coolant in the cooling element 21 can be flexibly adjusted, making the temperature of the cold end of the temperature difference device 2 controllable and adjustable. This ensures the test meets requirements and improves its practical value.

[0029] In some embodiments, such as Figure 1 As shown, the drive assembly 50 includes a drive member 51 and a pressure measuring member 52. The drive member 51 is configured to drive the transmission member 22, and with the cooperation of the moving mating member 40, drive the cooling member 21 to cool or not cool the cold end of the temperature difference device 2. The pressure measuring member 52 is disposed on the drive member 51 and is configured to measure the pressure between the cold end and the hot end of the temperature difference device 2 when the drive member 51 causes the cooling member 21 to contact the cold end of the temperature difference device 2.

[0030] In such an embodiment, specifically, the driving member 51 can move upward to drive the transmission member 22 of the movable cold source assembly 20, pressing the temperature difference device 2 between the cooling member 21 of the movable cold source assembly 20 and the heat-conducting member 12 of the heat source assembly 10, thereby reducing the thermal resistance between the temperature difference device 2 and them, and ensuring the uniformity of its cold end being cooled and its hot end being heated.

[0031] In such an embodiment, such as Figure 1 As shown, a spherical fixing member can also be provided on the heat-conducting component 12 of the heat source component 10. The spherical fixing member is connected to the concave mating part of the support component 11 of the heat source component 10, which can ensure that the direction of the force from the driving component 51 on the temperature difference device 2 is perpendicular to the end face direction of the hot end and cold end of the temperature difference device 2, so that the force is uniform.

[0032] In such an embodiment, specifically, the driving component 51 can be a compression spring connected to the motor, and the pressure measuring component 52 can be a pressure sensor.

[0033] The embodiments of this application, by setting a driving component 51 to drive the transmission component 22 of the movable cold source assembly 20, and with the cooperation of the movable mating component 40, drive the cooling component 21 to cool or not cool the cold end of the temperature difference device 2. A pressure measuring component 52 is set up to measure the pressure at the cold and hot ends of the temperature difference device 2 when the driving component 51 causes the cooling component 21 to contact the cold end of the temperature difference device 2. This allows the temperature of the cold end of the temperature difference device 2 to be controllable and adjustable, while simultaneously monitoring the pressure at the cold and hot ends of the temperature difference device 2 in real time during testing. Furthermore, the driving component 51 drives the transmission component 22, which in turn drives the cooling component 21, to further press or move away from the temperature difference device 2, making the pressure at the cold and hot ends of the temperature difference device 2 controllable and adjustable. Therefore, the test meets the requirements, improves the practical value of the test, and enhances the safety of the test.

[0034] In some embodiments, the pressure measuring element 52 is further configured such that when the pressure at the cold end and the hot end of the temperature difference device 2 deviates from the target range, the driving element 51 can automatically drive the transmission element 22 so that the pressure at the cold end and the hot end of the temperature difference device 2 returns to the target range.

[0035] In such an embodiment, specifically, the driving component 51 may include a compression spring, which can maintain the pressure on the cold end and hot end of the temperature difference device 2 within a certain range; the pressure measuring component 52 is disposed on the driving component 51, and the driving component 51 may include a motor connected to the compression spring. When the pressure measuring component 52 detects that the pressure of the cold end and hot end of the temperature difference device is out of the target range, it can send a signal to the motor, so that the driving component 51 automatically drives the transmission component 22 to bring the pressure of the cold end and hot end of the temperature difference device 2 back to the target range.

[0036] The embodiments of this application, through the above-described settings, enable the pressure measuring element 52 to not only measure the pressure of the cold end and the hot end of the temperature difference device 2, but also to automatically adjust the pressure of the cold end and the hot end of the temperature difference device 2 through the driving element 51, thereby avoiding poor contact or other safety problems between the cold end and the cooling element of the temperature difference device 2 caused by improper supervision, thus making the test simpler and safer.

[0037] In some embodiments, such as Figure 1 As shown, the movable mating member 40 is configured to connect the transmission member 22 and the vacuum container 30; and is configured such that the telescopic mating transmission member 22 drives the cooling member 21 to move under the drive of the drive assembly 50, thereby maintaining the connection between the transmission member 22 and the vacuum container 30.

[0038] In such an embodiment, specifically, the movable mating part 40 can be a bellows, one end of which is welded to the transmission part 22 and the other end is welded to the vacuum container 30, participating in the formation of the sealed space formed by the vacuum container 30. The bellows can also be adapted to the drive assembly 50. When the drive assembly 50 drives the transmission part 22 and moves the cooling part 21, it expands and contracts to match the movement of the drive assembly 50, maintaining the sealed space formed by the vacuum container 30.

[0039] In such an embodiment, specifically, the movable mating component 40 can be a bellows, which can be connected to the inlet and outlet of the coolant flow pipe of the cooling component 21, further cooperating with the movement of the cooling component 21 under the drive of the drive assembly 50.

[0040] Through the above-mentioned configuration, this application ensures that the movement of the mobile cold source component 20 and the maintenance of the sealed space formed by the vacuum container 30 do not interfere with each other during the test, keeping the device sealed during the test, preventing radiation leakage, and helping to control radiation hazards during the test.

[0041] In some embodiments, the vacuum container 30 is configured to allow the placement and removal of the thermoelectric device 2.

[0042] The embodiments of this application, by setting a vacuum containment 30 that allows the thermoelectric device 2 to be placed in and removed, can flexibly transfer the thermoelectric device 2 between the reactor and the vacuum containment 30. This enables the measurement of the thermoelectric device 2 after irradiation treatment and repeated measurement of the thermoelectric device 2 after treatment in different irradiation environments. As a result, the dependence of test conditions on the reactor is reduced, the flexibility and safety of the test are improved, and the diversity of the test is increased.

[0043] In some embodiments, such as Figure 1 As shown, the test device 1 also includes an insulating component 60, which is disposed on the cooling component 21 of the mobile cold source assembly 20 and is configured to place the conductive wire of the temperature difference device 2. When the cooling component 21 of the mobile cold source assembly 20 cools the cold end of the temperature difference device 2, it insulates the temperature difference device 2.

[0044] In such an embodiment, the insulating component 60 can be a perforated ceramic plate, the thermoelectric device 2 is disposed in the perforation of the ceramic plate, the lead of the thermoelectric device 2 can directly contact the ceramic plate, and the lead of the thermoelectric device 2 draws out the current through four terminal clamps. The electrical performance of the thermoelectric device 2 can be measured without removing the thermoelectric device 2 from the vacuum containment.

[0045] The embodiments of this application provide insulation for the temperature difference device 2 when the cooling component 21 of the mobile cold source assembly 20 cools the cold end of the temperature difference device 2. This insulation allows the electrical performance of the temperature difference device 2 to be measured without direct contact during testing, preventing irradiation leakage and leakage accidents, thereby providing a safe and convenient testing environment.

[0046] In some embodiments, such as Figure 1 As shown, the test device 1 also includes a resistance-reducing component 70, which is respectively disposed between the heat-conducting component 12 of the heat source assembly 10 and the hot end of the temperature difference device 2, and between the cooling component 21 of the mobile cold source assembly 20 and the cold end of the temperature difference device 2. The resistance-reducing component 70 is configured to reduce the contact thermal resistance between the heat-conducting component 12 of the heat source assembly 10 and the hot end of the temperature difference device 2, and between the cooling component 21 of the mobile cold source assembly 20 and the cold end of the temperature difference device 2.

[0047] In such an embodiment, specifically, the resistance-reducing component 70 can be a graphite plate with a thickness of 0.3-0.5 mm.

[0048] The embodiments of this application reduce the contact thermal resistance between the heat-conducting component 12 of the heat source assembly 10 and the hot end of the temperature difference device 2, and between the cooling component 21 of the mobile cold source assembly 20 and the cold end of the temperature difference device 2, by setting the resistance-reducing component 70. This enhances the heat conduction and cooling effect, reduces the temperature difference between the hot end of the temperature difference device 2 and the heat source assembly 10, and between the cold end of the temperature difference device 2 and the cold source assembly. As a result, the heat generation and power consumption of the heat source assembly 10 and the coolant consumption of the mobile cold source assembly 20 are reduced, saving energy and improving the economy and environmental friendliness of the test.

[0049] To address the aforementioned technical problems, another aspect of the embodiments of this application provides a method for testing the power generation performance of an irradiated thermoelectric device 2. This method employs the testing apparatus 1 provided in the embodiments of this application and includes the following steps: S10, obtaining the irradiated thermoelectric device 2; S20, placing the thermoelectric device 2 into the vacuum containment 30 of the testing apparatus 1; S30, inputting a corresponding coolant into the cooling component 21 of the mobile cold source assembly 20 of the testing apparatus 1 according to the testing requirements of the thermoelectric device 2; S40, heating the hot end of the thermoelectric device 2 using the heat source assembly 10 of the testing apparatus 1, and cooling the cold end of the thermoelectric device 2 using the mobile cold source assembly 20 of the testing apparatus 1, driven by the drive assembly 50 of the testing apparatus 1, and cooperating with the moving cooperating component 40 of the testing apparatus 1, thereby testing the power generation performance of the irradiated thermoelectric device 2; S50, removing the thermoelectric device 2 after the test in step S40 from the vacuum containment 30 of the testing apparatus 1, and adjusting and repeating steps S10-S40 according to the test results obtained in step S40 and new testing requirements.

[0050] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0051] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A testing device suitable for testing the power generation performance of thermoelectric devices after irradiation treatment, characterized in that, It includes: a heat source assembly, a mobile cold source assembly, a vacuum containment component, a mobile mating component, and a drive assembly; The heat source component is configured to heat the hot end of the thermoelectric device. The mobile cold source assembly is configured to cool the cold end of the temperature difference device; The heat source assembly and the mobile cold source assembly are disposed in the vacuum containment component; The movable mating component is configured to maintain a seal between the movable cold source assembly and the vacuum containment component when the movable cold source assembly moves. The driving component is configured to drive the mobile cold source component to move, so that the mobile cold source component cools the cold end of the temperature difference device, or does not cool it. The drive assembly is also configured to test the pressure at the cold and hot ends of the thermoelectric device.

2. The testing apparatus according to claim 1, characterized in that, The heat source assembly includes: a support component, a heat-conducting component, and a heating component; The heat-conducting component is fixedly disposed on the support component, and the support component is fixedly disposed on the vacuum containment component; The heat-conducting component is configured to conduct the heat generated by the heating component to the hot end of the temperature difference device, so as to heat the hot end of the temperature difference device; The heat-conducting element is configured to ensure that the temperature of the hot end of the thermoelectric device is uniform.

3. The testing apparatus according to claim 1, characterized in that, The mobile cold source assembly includes: a cooling component and a transmission component; The cooling element is configured to allow coolant to circulate; The transmission component is configured to, under the drive of the drive assembly, drive the cooling component to contact or move away from the cold end of the temperature difference device, so that the cooling component cools the cold end of the temperature difference device or does not cool it. The cooling component and the transmission component are disposed within the vacuum containment component. When the transmission component moves the cooling component, it maintains a seal with the vacuum containment component through the moving mating component.

4. The testing apparatus according to claim 3, characterized in that, The drive assembly includes: a drive component and a pressure measuring component; The driving component is configured to drive the transmission component, and with the cooperation of the moving mating component, drive the cooling component to cool the cold end of the temperature difference device, or not to cool it. The pressure measuring element is disposed on the driving element and is configured to measure the pressure at the cold end and hot end of the temperature difference device when the driving element causes the cooling element to contact the cold end of the temperature difference device.

5. The testing apparatus according to claim 4, characterized in that, The pressure measuring device is further configured such that when the pressure at the cold end and the hot end of the temperature difference device deviates from the target range, the driving device can automatically drive the transmission device to bring the pressure at the cold end and the hot end of the temperature difference device back to the target range.

6. The testing apparatus according to claim 3, characterized in that, The movable mating component is configured to connect the transmission component and the vacuum accommodating component; It is configured such that the telescopically cooperating transmission component drives the cooling component to move under the drive of the drive assembly, while maintaining the connection between the transmission component and the vacuum containment component.

7. The testing apparatus according to claim 1, characterized in that, The vacuum containment is configured to allow the thermoelectric device to be inserted and removed.

8. The testing apparatus according to any one of claims 1-7, characterized in that, Also includes: insulating components; The insulating component is disposed on the cooling component of the mobile cold source assembly and is configured to place the conductive wire of the temperature difference device. When the cooling component of the mobile cold source assembly cools the cold end of the temperature difference device, it insulates the temperature difference device.

9. The testing apparatus according to claim 8, characterized in that, Also includes: resistance-reducing components; The resistance-reducing components are respectively disposed between the heat-conducting component of the heat source assembly and the hot end of the temperature difference device, and between the cooling component of the movable cold source assembly and the cold end of the temperature difference device. The resistance-reducing component is configured to reduce the contact thermal resistance between the heat-conducting component of the heat source assembly and the hot end of the temperature difference device, and between the cooling component of the movable cold source assembly and the cold end of the temperature difference device.

10. A method for testing the power generation performance of a thermoelectric device after irradiation treatment, characterized in that, It employs the testing apparatus according to any one of claims 1-9, which comprises: S10: Obtain the temperature difference device after irradiation treatment; S20: Place the temperature difference device into the vacuum container of the test device; S30: According to the testing requirements of the temperature difference device, input the corresponding coolant into the cooling component of the mobile cold source assembly of the testing device; S40: Using the heat source component of the test device, heat the hot end of the thermoelectric device; using the mobile cold source component of the test device, driven by the drive component of the test device, and in cooperation with the moving mating parts of the test device, cool the cold end of the thermoelectric device; and test the power generation performance of the thermoelectric device after irradiation treatment. S50: Remove the temperature difference device after the test in step S40 from the vacuum container of the test device. Adjust and repeat steps S10-S40 according to the test results obtained in step S40 and the new test requirements.

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