Testing tool and device thereof
By designing a test tool for thermal gaskets, using the combined structure of containers, guides and condensers, the presence or absence of low molecular weight volatile substances in thermal gaskets is achieved quickly, and the detection cycle in the prior art is solved The long problems meet production needs.
Patent Information
- Application Number
- CN202323603964.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-27
AI Technical Summary
The prior art is difficult to efficiently detect low molecular weight volatile substances in thermal gaskets, resulting in a long detection cycle and difficulty keeping up with the production rhythm. It does not require accurate detection of its content, but only needs to detect no volatile condensate.
Design a test tool, including a container, a guide and a condenser, which is used to place a thermal gasket, the guide and the condenser form a space for volatiles to volatile, and the bottom of the condenser is spaced between the top of the container, Condenser is used to condense volatiles, and it is determined whether the thermal gasket contains low molecular weight volatile substances by observing the condensation phenomenon.
It realizes rapid and convenient detection of the presence or absence of low molecular weight volatile substances in thermal gaskets, improves detection efficiency and meets production needs.
Smart Images
Figure CN222144912U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of testing tools, and in particular to a testing tool and a device thereof. Background Art
[0002] There are a large number of low molecular weight volatiles, water molecules and other small molecular weight volatile organic compounds with molecular weights between 3 and 20 in the organic siloxane, treatment agent, thermal conductive powder and the like in the thermal conductive material. During the use of the thermal conductive material, the thermal conductive material needs to transfer heat, that is, the thermal conductive material needs to be heated. The low molecular weight volatiles, water molecules and other small molecular weight volatile organic compounds with molecular weights between 3 and 20 in the thermal conductive material are easily volatilized when heated. If such a thermal conductive material is used in an electronic circular device, these volatiles volatilized by the thermal conductive material will condense and adhere to the device when encountering other electronic components with a temperature difference from the thermal conductive material, which will affect the use of the device. Therefore, more and more industries require the control and reduction of the low molecular weight content in the thermal conductive material, and even require the removal of low molecular weight to achieve the effect of no volatile condensate.
[0003] With the mass production of low molecular weight non-volatile condensate products, especially the wide application of thermal conductive gaskets, it is necessary to conduct qualitative testing on the molecular weight non-volatile condensate characteristics of thermal conductive gaskets. The main test items are low molecular weight volatiles with a molecular weight between 3 and 20, and the test cycle for low molecular weight volatiles with a molecular weight between 3 and 20 is as long as 7 working days.
[0004] In the prior art, the qualitative detection method for the characteristics of low molecular weight non-volatile condensate of thermal conductive gaskets is difficult to keep up with the production rhythm in mass production. In actual production, the detection of low molecular weight volatile substances does not require accurate detection of their content, and it is sufficient to detect that no volatile condensate is produced. Therefore, there is still a need for improvement. Utility Model Content
[0005] The purpose of the present application is to provide a testing tool and a device thereof, so as to efficiently and conveniently detect whether a thermally conductive gasket contains low molecular weight volatile substances.
[0006] In the first aspect, a test tool provided by the present application adopts the following technical solution:
[0007] A test fixture comprises a container, a guide member and a condensation member, wherein the container is used to place a thermally conductive gasket, the guide member is installed between the condensation member and the container, the condensation member is connected to an end of the guide member away from the container, and the guide member and the condensation member enclose a space for volatiles to evaporate, a certain distance is set between the bottom of the condensation member and the top of the container, and the condensation member is used to adhere to condensed volatiles.
[0008] By adopting the above technical scheme, a thermally conductive gasket can be placed in a container, and the container can transfer heat to the thermally conductive gasket. If the thermally conductive gasket contains low molecular weight volatile substances, the low molecular weight volatile substances can volatilize due to heat. The guide member is installed between the condensation member and the container, and the guide member is used to limit the direction of the volatile substances, so that the low molecular weight organic compounds volatilized from the thermally conductive gasket can move along the direction of the guide member, so that the volatile substances can volatilize into the condensation member. There is a certain distance between the bottom of the condensation member and the upper surface of the container, so that there is a certain temperature difference between the condensation member and the container, that is, the temperature of the condensation member is lower than the temperature of the container. The condensation member can make the volatile substances condense and adhere to the condensation member after encountering the condensation member, so that the staff can determine that the thermally conductive gasket contains low molecular weight volatile substances by observing the condensation phenomenon on the condensation member; when there is no condensation phenomenon on the condensation member, it is determined that there is no low molecular weight volatile substance in the thermally conductive gasket.
[0009] Preferably, the guide member includes a heat-conducting cylinder, which is provided with a bottom plate, and the bottom plate is installed on the bottom surface of the heat-conducting cylinder. The container is located on the bottom plate, and the container is located in the heat-conducting cylinder. One end of the heat-conducting cylinder away from the container is connected to the condensation member, and the bottom plate, the heat-conducting cylinder and the condensation member enclose a space for volatilization of volatiles.
[0010] By adopting the above technical solution, a bottom plate is provided on the heat-conducting cylinder so that the lower end of the heat-conducting cylinder is closed, and the container is located in the heat-conducting cylinder, so that the volatiles of the heat-conducting gasket can move along the length direction inside the heat-conducting cylinder. The heat conduction of the heat-conducting cylinder can make the temperature of the heat-conducting cylinder close to the temperature of the container, so that the heat-conducting cylinder can provide the volatiles with the effect of moving the volatiles along the length direction inside the heat-conducting cylinder, and the heat-conducting cylinder is connected to the condensation member so that the volatiles are condensed on the condensation member.
[0011] Preferably, the condensation element includes a condensation sheet, which is transparent and placed on the heat-conducting cylinder. The condensation sheet closes the upper end of the heat-conducting cylinder. The condensation sheet, the heat-conducting cylinder and the bottom plate form a closed space with a certain height, and the bottom of the condensation sheet is at a certain distance from the upper surface of the container.
[0012] By adopting the above technical solution, the condensing sheet is placed on the heat-conducting cylinder, so that the volatiles come to the condensing sheet along the length direction inside the heat-conducting cylinder. At the same time, there is a certain distance between the bottom of the condensing sheet and the top of the container, that is, the temperature of the condensing sheet is lower than that of the heat-conducting cylinder. There is a temperature difference between the condensing sheet and the container, so that the volatiles can condense and adhere to the condensing sheet. The condensing sheet is set to a transparent state, so that the staff can directly observe whether there is condensation on the condensing sheet from the outside, so as to judge whether the heat-conducting gasket contains low molecular weight volatile substances. The condensing sheet closes the upper end of the heat-conducting cylinder, so that the condensing sheet, the heat-conducting cylinder and the bottom plate form a closed space for the volatiles to evaporate, which can make all the volatiles condense on the condensing sheet, and the condensation phenomenon is more obvious, so that the staff can more easily observe whether there is condensation, that is, it makes it easier for the staff to judge whether the heat-conducting gasket contains low molecular weight volatile substances.
[0013] Preferably, the condensing sheet is provided with a circle of flanges, and the flanges are installed at the edge of the condensing sheet.
[0014] By adopting the above technical solution, a circle of flanges is provided on the edge of the condensing sheet, which can improve the structural stability of the condensing sheet and the heat-conducting cylinder. At the same time, the flange makes it easy for workers to take and place the condensing sheet.
[0015] Preferably, the ratio of the height of the container to the height of the heat-conducting cylinder is in the range of 1:5-2:5, and the ratio of the distance from the upper surface of the container to the bottom surface of the condensing plate to the height of the heat-conducting cylinder is in the range of 3:5-4:5.
[0016] By adopting the above technical solution, by setting the ratio of the height of the container to the height of the heat-conducting cylinder to be between 1:5-2:5, and the sum of the distance from the upper surface of the container to the bottom surface of the condensing sheet and the height of the container equal to the height of the heat-conducting cylinder, the ratio of the distance from the upper surface of the container to the bottom surface of the condensing sheet to the height of the heat-conducting cylinder is in the range of 3:5-4:5, which can ensure that the distance between the bottom surface of the condensing sheet and the upper surface of the container forms a temperature difference between the condensing sheet and the container, so that when the volatiles condense into mist on the condensing sheet, the bottom end of the heat-conducting cylinder is close to the temperature of the container.
[0017] Preferably, the height of the heat-conducting cylinder ranges from 110 mm to 130 mm.
[0018] By adopting the above technical solution, the container and the condensing sheet are respectively located at the two ends of the heat-conducting cylinder, and the height of the heat-conducting cylinder is selected between 110mm and 130mm, ensuring that the distance between the upper surface of the container and the bottom surface of the condensing sheet is sufficient to ensure that there is a temperature difference between the container and the condensing sheet for condensation of volatiles. At the same time, the heat-conducting cylinder is placed vertically, which can make the position of the heat-conducting cylinder more stable.
[0019] Preferably, the thickness of the wall of the heat-conducting cylinder is in the range of 2 mm to 4 mm.
[0020] By adopting the above technical solution, the thickness of the wall of the heat-conducting cylinder is in the range of 2mm-4mm, which can enable the heat-conducting cylinder to better withstand high temperatures and provide better strength and durability for the test tooling. At the same time, the heat-conducting cylinder can quickly transfer heat so that the temperature of the lower end of the heat-conducting cylinder is close to that of the container, so that the heat-conducting cylinder can play a role in moving volatiles along the length direction inside the heat-conducting cylinder.
[0021] On the second aspect, in order to improve the practicability of the testing tooling, the present application provides a testing device.
[0022] A testing device comprises a heating element and the testing tool described in the above scheme, wherein the testing tool is located on the heating element, and the heating element is used to provide heat for the testing tool.
[0023] Preferably, the heating element is a constant temperature heating platform, and the testing tooling comprises a heat-conducting cylinder, and the heat-conducting cylinder is located on the constant temperature heating platform.
[0024] By adopting the above technical solution, the constant temperature heating table can maintain a constant temperature, so that the volatiles evaporate more stably. The heat-conducting cylinder is placed on the constant temperature heating table, which can heat the heat-conducting cylinder of the constant temperature heating table. The container is located in the heat-conducting cylinder, so that the heat-conducting cylinder can transfer heat to the container, so that the temperature of the container and the bottom end of the heat-conducting cylinder is close, so that the evaporated volatiles move along the heat-conducting cylinder, so that the heat-conducting cylinder can play a guiding role.
[0025] In summary, the present application includes at least one of the following beneficial technical effects:
[0026] 1. There is a certain distance between the bottom of the condensation piece and the upper surface of the container, so that there is a certain temperature difference between the condensation piece and the container, that is, the temperature of the condensation piece is lower than the temperature of the container. The condensation piece can make the volatile matter condense and adhere to the condensation piece after encountering the condensation piece, so that the staff can determine that the thermal pad contains low molecular weight volatile substances by observing the condensation phenomenon on the condensation piece; when there is no condensation phenomenon on the condensation piece, it is determined that there is no low molecular weight volatile substance in the thermal pad;
[0027] 2. By setting the ratio of the height of the container to the height of the heat-conducting cylinder between 1:5-2:5, and the sum of the distance from the upper surface of the container to the bottom of the condensing sheet and the height of the container equal to the height of the heat-conducting cylinder, the ratio of the distance from the upper surface of the container to the bottom of the condensing sheet to the height of the heat-conducting cylinder is 3:5-4:5, which can ensure that the distance between the bottom of the condensing sheet and the upper surface of the container forms a temperature difference between the condensing sheet and the container, so that when the volatiles condense into mist on the condensing sheet, the bottom of the heat-conducting cylinder is close to the temperature of the container;
[0028] 3. In the present application, the test device heats the heat-conducting cylinder through a constant temperature heating table, and the container is located inside the heat-conducting cylinder, so that the heat-conducting cylinder can transfer heat to the container, so that the temperature difference between the container and the bottom end of the heat-conducting cylinder is close. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a schematic diagram of the internal structure of the test tooling of Example 1 of the present application;
[0030] Figure 2 is a schematic cross-sectional structural diagram of the test tooling of Example 2 of the present application;
[0031] Figure 3 It is a schematic diagram of the overall structure of the test tooling and its device of this application.
[0032] Explanation of the accompanying drawings: 1. container; 2. thermally conductive gasket; 3. thermally conductive cylinder; 4. condenser; 5. flange; 6. constant temperature heating table. DETAILED DESCRIPTION
[0033] The following is combined with Figure 1-3 This application is described in further detail.
[0034] Example 1
[0035] The present application discloses a testing tool for detecting whether a thermally conductive gasket 2 has low molecular weight volatiles. Figure 1The test tooling includes a container 1, a guide and a condensation piece. The thermally conductive gasket 2 is placed in the container 1. By using a heat source to conduct heat to the container 1, the container 1 conducts the heat to the thermally conductive gasket 2, and the thermally conductive gasket 2 can absorb the heat. When there are small molecular weight volatile organic compounds in the thermally conductive gasket 2, the thermally conductive gasket 2 is heated to volatilize the low molecular weight volatile substances in the thermally conductive gasket 2. The guide is installed between the container 1 and the condensation piece, and the end of the guide away from the container 1 is connected to the condensation piece, so that the guide and the condensation piece are enclosed to form a space for the volatile substances to volatilize. Since the guide has thermal conductivity, the lower end of the guide is in contact with the heat source, so the temperature of the end of the guide in contact with the heat source is close to the temperature of the container 1, and the temperature of the top of the guide is lower than the temperature of the bottom of the guide, so the temperature of the condensation piece is lower than the temperature of the bottom of the guide, so that there can be a certain temperature difference between the condensation piece and the container 1. Under the action of the guide member, when the space contains volatiles evaporated from the thermal gasket 2, the volatiles can only flow in the space, so that the volatiles will adhere to the condensation member after encountering the condensation member, so that the staff can judge whether the thermal gasket 2 contains low molecular weight volatile substances by observing the condensation phenomenon on the condensation member.
[0036] In the embodiment of the present application, the container 1 and the guide member are preferably made of glass. The container 1 and the guide member made of glass are low-cost and easy to obtain; and the glass can have thermal conductivity, so that when the container 1 and the guide member are heated by a heat source, the temperature of the container 1 is close to the temperature of the lower end of the guide member.
[0037] Reference Figure 1 The guide member includes a heat-conducting cylinder 3, and a bottom plate is fixedly arranged at the bottom of the heat-conducting cylinder 3. The bottom plate is made of glass so that the bottom plate and the heat-conducting cylinder 3 can be fixedly connected and can conduct heat. The container 1 is located on the bottom plate, that is, the container 1 is located in the heat-conducting cylinder 3, and the heat source transfers heat to the container 1 through the bottom plate. The diameter of the heat-conducting cylinder 3 is larger than the diameter of the container 1, so the guide member can be applied to containers 1 of different sizes, so as to further improve the application range of the guide member.
[0038] In order to better control the temperature of the upper end of the heat-conducting cylinder 3, the height of the heat-conducting cylinder 3 ranges from 110 mm to 130 mm. In the embodiment of the present application, the height of the heat-conducting cylinder 3 is preferably 120 mm, which can ensure that there is a sufficient distance between the bottom surface of the condensing member and the upper surface of the container 1, so that when heat is transferred to the condensing member, there is a temperature difference of more than 50°C between the upper surface of the container 1 and the condensing member, that is, the temperature of the bottom surface of the condensing member and the upper surface of the container 1 form a temperature difference sufficient for the condensation of volatiles. And the container 1 is placed in the heat-conducting cylinder 3, which makes it easy to take and put the container 1 in the heat-conducting cylinder 3. At the same time, the heat-conducting cylinder 3 is placed vertically, and the height of the heat-conducting cylinder 3 is preferably 120 mm, which can maintain the position stability of the heat-conducting cylinder 3.
[0039] Specifically, the height ratio of the container 1 to the height of the heat-conducting cylinder 3 is set between 1:5 and 2:5. The height of the container 1 and the height of the heat-conducting cylinder 3 can form a temperature difference between the bottom surface of the condensing sheet 4 and the upper surface of the container 1, that is, the ratio range of the distance from the upper surface of the container 1 to the bottom surface of the condensing sheet 4 and the height of the heat-conducting cylinder 3 is 3:5-4:5. In this embodiment, the height ratio of the container 1 to the height of the heat-conducting cylinder 3 is set to 3:10, so as to ensure that the distance between the bottom surface of the condensing sheet 4 and the upper surface of the container 1 is sufficient to form a temperature difference between the condensing sheet 4 and the container 1, so that the volatile matter condenses into mist on the condensing sheet 4, and the lower end of the heat-conducting cylinder 3 is close to the temperature of the container 1.
[0040] More specifically, the thickness of the barrel wall of the heat-conducting cylinder 3 ranges from 2mm to 4mm. When the thickness of the barrel wall of the heat-conducting cylinder 3 is 4mm, compared with the barrel wall of the heat-conducting cylinder 3 with a thickness of 2mm, the thicker barrel wall can provide better heat uniformity, so that the barrel wall of the heat-conducting cylinder 3 is evenly heated, and the heat-conducting cylinder 3 can have better high temperature resistance, and can better adapt to the properties of volatiles, so as to provide better strength and durability for the test tool. When the thickness of the barrel wall of the heat-conducting cylinder 3 is 2mm, the heat-conducting cylinder 3 can quickly transfer heat, so that the temperature of the lower end of the heat-conducting cylinder 3 is close to that of the container 1, so that the heat-conducting cylinder 3 can play a role in moving the volatiles along the length direction of the inside of the heat-conducting cylinder 3. In the embodiment of the present application, the thickness of the barrel wall of the heat-conducting cylinder 3 is preferably 3mm, so that the barrel wall of the heat-conducting cylinder 3 can meet the requirements of providing better strength and durability for the test tool, and can also quickly transfer heat, so that the temperature of the lower end of the heat-conducting cylinder 3 is close to that of the container 1.
[0041] Reference Figure 1 The condensation part includes a condensation sheet 4. The upper surface of the heat-conducting cylinder 3 is flat. The condensation sheet 4 is placed at the upper end of the heat-conducting cylinder 3. There is a certain distance between the bottom surface of the condensation sheet 4 and the upper surface of the container 1, so that there is a certain temperature difference between the condensation sheet 4 and the container 1 and condenses into mist. The condensation sheet 4 is transparent so that the staff can directly observe whether there is condensation on the condensation sheet 4 from the outside. The diameter of the condensation sheet 4 is larger than the inner diameter of the heat-conducting cylinder 3, so that the condensation sheet 4 is placed on the heat-conducting cylinder 3 and the heat-conducting cylinder 3 can be closed, that is, the condensation sheet 4, the heat-conducting cylinder 3 and the bottom plate are enclosed to form a closed space, so that the low molecular weight volatiles between 3 and 20 in the heat-conducting pad 2 and other small molecular weight volatile organic compounds can volatilize and move in the closed space, so that the volatiles can be more condensed and attached to the condensation sheet 4, and at the same time the closed space is separated from the outside space, thereby isolating the volatiles from the outside, further protecting the environment.
[0042] The implementation principle of the embodiment of the present application is: a thermally conductive pad 2 is placed on a container 1, and heat is transferred to the container 1 through a heat source, so that the container 1 can transfer heat to the thermally conductive pad 2. When condensation occurs on the condensation sheet 4 during high-temperature heating, the staff can determine that there are low-molecular-weight volatile substances in the thermally conductive pad 2 by observing the condensation phenomenon of the condensation sheet 4; when there is no condensation on the condensation sheet 4 during high-temperature heating, the staff can determine that there are no low-molecular-weight volatile substances in the thermally conductive pad 2.
[0043] Example 2
[0044] A test tool, reference Figure 2 The difference from Example 1 is that a circle of flange 5 is provided at the edge of the condensing sheet 4. The establishment of the flange 5 can facilitate the staff to take and place the condensing sheet 4 by holding the flange 5, thereby increasing the convenience of the test tooling operation. At the same time, the condensing sheet 4 is provided with the flange 5, which makes the condensing sheet 4 more stable on the heat-conducting cylinder 3, further improving the stability of the test tooling.
[0045] The present application also discloses a testing device, referring to Figure 3 , including a heating element and any one of the test fixtures in the above embodiments, the test fixture is located on the heating element, and the heating element is used to heat the test fixture, thereby detecting whether there is volatilization of low molecular weight volatile substances in the thermal pad 2.
[0046] Specifically, the heating element includes a constant temperature heating platform 6, and the constant temperature heating platform 6 includes a support portion and a heating portion. The support portion is preferably a copper plate, and the copper plate has good thermal conductivity, and the heating portion can heat the support portion. The heat-conducting cylinder 3 is placed on the support portion of the constant temperature heating platform 6, and the constant temperature heating platform 6 can heat the heat-conducting cylinder 3. The container 1 is placed in the heat-conducting cylinder 3, and the heat can be transferred from the heat-conducting cylinder 3 to the container 1, so that the container 1 conducts the heat to the thermally conductive gasket 2, and the volatiles volatilized from the thermally conductive gasket 2 are attached to the condensation part under the guidance of the thermally conductive cylinder 3. In this embodiment, considering the surface heating area of the constant temperature heating platform 6, the constant temperature heating platform 6 can heat multiple test fixtures at the same time, that is, the constant temperature heating platform 6 can conduct experiments on multiple samples of thermally conductive gaskets 2 at the same time.
[0047] It is worth noting that the heating temperature provided by the constant temperature heating platform 6 for the thermally conductive gasket 2 is preferably 150°C. When the constant temperature heating platform 6 provides 150°C for the thermally conductive gasket 2, the low molecular weight volatiles with a molecular weight between 3 and 20 and other small molecular weight volatile organic compounds in the thermally conductive gasket 2 can fully volatilize.
[0048] The implementation principle of the embodiment of the present application is: by placing the heat-conducting cylinder 3 and the bottom plate on the constant temperature heating platform 6, placing the container 1 on the bottom plate, and using the constant temperature heating platform 6 to heat the container 1 and the heat-conducting pad 2. When condensation occurs on the condensing sheet 4 when heated at 150°C, the staff can determine whether there is a low molecular weight volatile substance in the heat-conducting pad 2 by observing the condensation phenomenon of the condensing sheet 4; when the heat-conducting pad 2 does not contain volatile substances, no condensation occurs on the condensing sheet 4.
[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A test tool, characterized in that: The invention comprises a container (1), a guide member and a condensation member, wherein the container (1) is used to place a thermally conductive gasket (2), the guide member is installed between the condensation member and the container (1), the condensation member is connected to an end of the guide member away from the container (1), and the guide member and the condensation member enclose a space for volatiles to evaporate, a certain distance is provided between the bottom of the condensation member and the top of the container (1), and the condensation member is used to adhere to condensed volatiles.
2. A test tool according to claim 1, characterized in that: The guide member comprises a heat-conducting cylinder (3), the heat-conducting cylinder (3) is provided with a bottom plate, the bottom plate is mounted on the bottom surface of the heat-conducting cylinder (3), the container (1) is located on the bottom plate, and the container (1) is located in the heat-conducting cylinder (3), one end of the heat-conducting cylinder (3) away from the container (1) is connected to the condensing member, and the bottom plate, the heat-conducting cylinder (3) and the condensing member enclose a space for volatilization of volatiles.
3. A test tool according to claim 2, characterized in that: The condensation element comprises a condensation sheet (4), which is transparent and placed on the heat-conducting cylinder (3). The condensation sheet (4) closes the upper end of the heat-conducting cylinder (3). The condensation sheet (4), the heat-conducting cylinder (3) and the bottom plate form a closed space with a certain height. The bottom of the condensation sheet (4) is at a certain distance from the upper surface of the container (1).
4. A test tool according to claim 3, characterized in that: The condensing sheet (4) is provided with a circle of flanges (5), and the flanges (5) are installed at the edge of the condensing sheet (4).
5. A test tool according to claim 3, characterized in that: The ratio of the height of the container (1) to the height of the heat-conducting cylinder (3) is in the range of 1:5-2:5, and the ratio of the distance from the upper surface of the container (1) to the bottom surface of the condensing plate (4) to the height of the heat-conducting cylinder (3) is in the range of 3:5-4:
5.
6. A test tool according to claim 2, characterized in that: The height of the heat-conducting cylinder (3) ranges from 110 mm to 130 mm.
7. A test tool according to claim 2, characterized in that: The thickness of the wall of the heat-conducting cylinder (3) is in the range of 2 mm to 4 mm.
8. A testing device, characterized in that: It comprises a heating element and the test fixture according to any one of claims 1 to 7, wherein the test fixture is located on the heating element, and the heating element is used to provide heat for the test fixture.
9. A testing device according to claim 8, characterized in that: The heating element is a constant temperature heating platform (6), and the testing tool comprises a heat-conducting cylinder (3), wherein the heat-conducting cylinder (3) is located on the constant temperature heating platform (6).