Heat load test heat preservation device, heat load test system and test method

Abstract

The application provides a heat load test heat preservation device, a heat load test system and a test method. The heat load test heat preservation device comprises, from outside to inside, an outer layer plate, a composite heat preservation layer and a buffer layer. An inner cavity of the buffer layer forms a test cavity for accommodating a to-be-tested part. At least one side of the composite heat preservation layer facing the buffer layer and at least one side of the composite heat preservation layer facing the outer layer plate are made of different materials. In this way, the heat preservation requirements of different temperature fields are met by the different material design of the composite heat preservation layer, the stable heat preservation of the complex temperature inside the test cavity is met, and the temperature interference from the outside is also isolated, so that the practicability and versatility of the heat load test heat preservation device can be greatly improved.

Description

Technical Field

[0001] This application relates to the field of thermal load testing technology, and in particular to a thermal load testing insulation device, thermal load testing system, and testing method. Background Technology

[0002] Thermal load testing is a core method for verifying the thermal environment adaptability and reliability of electronic equipment. Its core value lies in simulating the complex temperature changes of electronic equipment under actual working conditions, so as to identify potential failure risks such as material thermal expansion and contraction, structural deformation, and performance degradation caused by temperature in advance, and avoid serious problems such as short circuits and cracks in the use of electronic equipment.

[0003] Current electronic devices typically require insulation devices to house them during thermal load testing. However, existing insulation devices often use a single insulation material to construct the insulation layer, resulting in poor insulation performance and limited practicality. Summary of the Invention

[0004] The purpose of this application is to provide a thermal load testing insulation device, a thermal load testing system, and a testing method, aiming to solve the problem of how to improve the practicality of the thermal load testing insulation device.

[0005] In a first aspect, embodiments of this application provide a thermal load testing insulation device, comprising an outer plate, a composite insulation layer, and a buffer layer arranged sequentially from the outside to the inside, wherein the inner cavity of the buffer layer forms a test cavity for accommodating the test piece; The composite insulation layer has at least one side facing the buffer layer and at least one side facing the outer layer plate made of different materials.

[0006] In some embodiments, the composite insulation layer includes a foam glass insulation layer, a graphene insulation layer, and a vacuum insulation layer arranged sequentially from the outside to the inside.

[0007] In some embodiments, the thickness of the foam glass insulation layer is no more than 10 mm; The thickness of the silicon graphene insulation layer is no more than 10 mm; The thickness of the vacuum insulation layer is no more than 5 mm; The buffer layer includes a polyurethane insulation layer; The thickness of the buffer layer is no greater than 5 mm; The outer layer includes a fiberglass plate; The thickness of the outer layer plate is no more than 2 mm; The outer layer and the foam glass insulation layer, the foam glass insulation layer and the graphene insulation layer, the graphene insulation layer and the vacuum insulation layer, and the vacuum insulation layer and the buffer layer are bonded together.

[0008] Secondly, embodiments of this application also provide a thermal load testing system, including a multi-dimensional temperature measurement module, a temperature control module, a main control unit, and a thermal load testing insulation device; The multi-dimensional temperature measurement module is located in the heat load test insulation device and is configured to detect and acquire multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value in the composite insulation layer, and the ambient temperature value outside the heat load test insulation device. The main control unit is electrically connected to the multi-dimensional temperature measurement module and the temperature control module respectively. The main control unit is used to receive multiple internal temperature values ​​and calculate a fused temperature value according to a preset weight. The main control unit calculates the temperature deviation based on the fused temperature value and compares it with a preset target temperature value, and calculates the internal and external temperature difference based on the comparison with the ambient temperature value. The main control unit controls the working state of the temperature control module according to the temperature deviation and the internal and external temperature difference, so as to adjust the fusion temperature to the allowable temperature deviation range of the target temperature value.

[0009] In some embodiments, the multi-dimensional temperature measurement module includes a first temperature measurement component disposed within the test chamber. The first temperature measurement component includes at least six first temperature sensors, which are respectively located on different surfaces of the test chamber to detect and acquire at least six internal temperature values. The composite insulation layer includes a foam glass insulation layer, a graphene insulation layer, and a vacuum insulation layer arranged sequentially from the outside to the inside. The multi-dimensional temperature measurement module includes a second temperature measurement component, which includes at least three second temperature sensors. The at least three second temperature sensors are respectively embedded in the foam glass insulation layer, the graphene insulation layer, and the vacuum insulation layer to detect and acquire at least three composite temperature values. The multi-dimensional temperature measurement module also includes a third temperature sensor, which is located outside the heat load test insulation device and is used to detect and acquire the ambient temperature value outside the heat load test insulation device.

[0010] In some embodiments, the temperature control module includes a heating unit, a cooling unit, and a blower, all electrically connected to the main control unit.

[0011] Thirdly, embodiments of this application also provide a test method for temperature testing using a thermal load testing system, comprising: S1. Set at least two sets of target temperature values ​​to be tested, allowable temperature deviation, and temperature control parameters corresponding to the target temperature values ​​through the main control unit, and perform a self-test on the thermal load test system. S2. Control the multi-dimensional temperature measurement module to detect and acquire multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value inside the composite insulation layer, and the ambient temperature value outside the thermal load test insulation device. S3. The main control unit receives multiple internal temperature values ​​and calculates a fused temperature value according to a preset weight; the main control unit calculates the temperature deviation based on the fused temperature value and compares it with a preset target temperature value, and calculates the internal and external temperature difference based on the comparison with the ambient temperature value; the main control unit records and saves the composite temperature value. S4. The main control unit controls the working state of the temperature control module and dynamically adjusts the temperature control parameters according to the temperature deviation and the internal and external temperature difference; the working state includes start / stop, operating power, and operating time. S5. Repeat steps S2-S4 until the fusion temperature is adjusted to within the allowable temperature deviation range of the target temperature value.

[0012] In some embodiments, prior to step S1, the testing method further includes: The thermal resistance parameters of the composite insulation layer and buffer layer corresponding to the target temperature value are set by the main control unit; wherein, the thermal resistance parameters include thickness and thermal conductivity. The thermal resistance values ​​of the composite insulation layer and the buffer layer are calculated by the main control unit based on the thermal resistance parameters; wherein, the thermal resistance value is the ratio of the thickness to the thermal conductivity. The total thermal resistance is obtained by summing the thermal resistance values ​​of each component through the main control unit and compared with a preset total thermal resistance threshold to detect whether the total thermal resistance is within a preset deviation range, and to issue an early warning when it exceeds the preset deviation range.

[0013] In some embodiments, the test method satisfies: T 融 =0.16×(T1+T2+T3+T4+T5)+0.2×T6; where, T 融 The fusion temperature values ​​are T1, T2, T3, T4, and T5, which are the internal temperature values ​​at various locations within the test chamber excluding the bottom surface, and T6 is the internal temperature value at the bottom surface. ΔT=T 融 -T 目标 Where ΔT is the temperature deviation, T 目标 The target temperature value; ΔT 环 =T 融 -T 环境 ; where ΔT 环 For the temperature difference between inside and outside, T 环境 This represents the ambient temperature value.

[0014] In some embodiments, the method of controlling the operating state of the temperature control module by the main control unit according to the temperature deviation and the internal and external temperature difference includes: The main control unit calculates the output control quantity of the temperature control module based on the temperature deviation and the internal and external temperature difference, and automatically adjusts the working state of the temperature control module based on the output control quantity. The main control unit calculates the output control quantity of the temperature control module according to the temperature control parameters corresponding to the target temperature value, the temperature deviation, and the internal and external temperature difference according to a preset formula. The preset formula is: U=K p ×ΔT+K i ×∫(ΔT)dt+K d ×ΔT ring; where K p The proportional coefficient of the temperature control parameters, K i The integral coefficient of the temperature control parameter, K d Let U be the differential system of the temperature control parameters, U be the output control quantity, and t be the temperature detection period. The main control unit adjusts the working state of the temperature control module based on the output control quantity; The method by which the main control unit dynamically adjusts the temperature control parameter according to the temperature deviation includes: reducing the temperature control parameter when the temperature deviation is less than a preset temperature difference.

[0015] The beneficial effects of this invention are: This application provides a thermal load testing insulation device, a thermal load testing system, and a testing method. The thermal load testing insulation device includes an outer plate, a composite insulation layer, and a buffer layer arranged sequentially from the outside to the inside. The inner cavity of the buffer layer forms a test chamber for accommodating the test specimen. The composite insulation layer has different materials on at least one side facing the buffer layer and at least one side facing the outer plate. This differentiated material design of the composite insulation layer addresses the insulation requirements of different temperature scenarios, thereby ensuring stable insulation of the complex temperature inside the test chamber while isolating it from external temperature interference. This significantly improves the practicality and versatility of the thermal load testing insulation device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the thermal load testing insulation device shown in the embodiment of this application; Figure 2This is a schematic diagram showing the distribution of the first temperature sensor in the thermal load testing insulation device shown in the embodiment of this application; Figure 3 This is a schematic diagram of the circuit structure of the thermal load testing system shown in the embodiment of this application; Figure 4 This is a schematic diagram of the method flow for the testing method shown in the embodiments of this application.

[0018] Figure label: 10. Thermal load testing insulation device; 100. Outer layer plate; 200. Composite insulation layer; 210. Foam glass insulation layer; 220. Graphene insulation layer; 230. Vacuum insulation layer; 300. Buffer layer; 400. Multi-dimensional temperature measurement module; 410. First temperature sensor; 420. Second temperature sensor; 430. Third temperature sensor; 500. Temperature control module; 600. Main control unit. Detailed Implementation

[0019] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0020] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0021] Reference Figure 1 As shown, this embodiment provides a thermal load testing insulation device 10, which includes an outer layer plate 100, a composite insulation layer 200 and a buffer layer 300 arranged sequentially from the outside to the inside. The inner cavity of the buffer layer 300 forms a test cavity for accommodating the test piece.

[0022] The composite insulation layer 200 has a different material on at least the side facing the buffer layer 300 and at least the side facing the outer layer 100.

[0023] In its specific implementation, the thermal load testing insulation device 10 consists of an outer layer plate 100, a composite insulation layer 200, and a buffer layer 300 arranged sequentially from the outside to the inside. These three layers work closely together to form a complete insulation box structure. The inner cavity of the buffer layer 300 encloses a closed testing chamber, which is used to house the test piece, such as a precision chip or electronic module. This provides an independent and sealed thermal load testing environment for the test piece, preventing external debris and airflow from interfering with the testing process, while also preventing temperature leakage within the testing chamber and ensuring the stability of the testing environment.

[0024] The outer side of the composite insulation layer 200 is mainly used to isolate external environmental temperature fluctuations, moisture erosion, and external impacts, adapting to complex external environments. The inner side of the composite insulation layer 200 is used to conform to the complex temperature conditions inside the test chamber, such as high temperature, low temperature, and alternating high and low temperature conditions, to reduce internal temperature loss and maintain temperature stability inside the test chamber. This embodiment breaks through the performance limitations of a single insulation material by setting different materials on the inner and outer sides of the composite insulation layer 200, and through the combination of differentiated materials, fundamentally improving the applicability and versatility of the thermal load testing insulation device 10.

[0025] Reference Figure 1 As shown, in some embodiments, the composite insulation layer 200 includes a foam glass insulation layer 210, a graphene insulation layer 220, and a vacuum insulation layer 230 arranged sequentially from the outside to the inside.

[0026] In other words, the composite insulation layer 200 in this embodiment adopts a gradient composite structure, consisting of a foam glass insulation layer 210, a graphene insulation layer 220, and a vacuum insulation layer 230 from the outside to the inside. The three layers are bonded together and complement each other's properties, further enhancing the insulation effect.

[0027] Specifically, the foam glass insulation layer 210 serves as the outer protective and heat-insulating layer of the composite insulation layer 200, and is directly bonded to the outer layer 100. Its material has the characteristics of high and low temperature resistance, flame retardancy and corrosion resistance, and strong environmental tolerance. It can effectively block the heat penetration and moisture erosion of the external environment, while also having a certain structural strength, which can help the outer layer 100 improve the overall structural stability.

[0028] The graphene insulation layer 220 is located between the foam glass insulation layer 210 and the vacuum insulation layer 230. Its material has the characteristics of low thermal conductivity, waterproof and moisture-proof and structural reinforcement. On the one hand, it can further block heat transfer and improve the overall thermal resistance. On the other hand, it can effectively avoid the deterioration of insulation performance caused by humid environment, solve the problem of low temperature moisture failure of existing single insulation materials, and at the same time enhance the overall structural rigidity of the composite insulation layer 200 to prevent interlayer displacement.

[0029] The vacuum insulation layer 230 is directly bonded to the buffer layer 300. As the core thermal resistance layer of the composite insulation layer 200, its material has an extremely low thermal conductivity, which can suppress interlayer heat conduction to the maximum extent and greatly reduce the heat exchange efficiency between the inside of the test chamber and the outside, so as to ensure the stability of the temperature inside the test chamber.

[0030] In some embodiments, the thickness of the foam glass insulation layer 210 is no greater than 10 mm; the thickness of the graphene insulation layer 220 is no greater than 10 mm; and the thickness of the vacuum insulation layer 230 is no greater than 5 mm.

[0031] By rationally setting the thickness dimensions as described above, while ensuring that the multi-layer structure of the composite insulation layer 200 has excellent thermal insulation performance, the thickness of each layer is strictly controlled to avoid the problems of bulky box volume, large test space occupation, and inconvenient handling and assembly caused by excessive overall thickness of the composite insulation layer 200. This achieves a balance between lightness and high thermal insulation performance.

[0032] For example, the thickness of the foam glass insulation layer 210 can be 10mm, 9mm or 8mm.

[0033] For example, the thickness of the graphene insulation layer 220 can be 10mm, 9mm or 8mm.

[0034] For example, the thickness of the vacuum insulation layer 230 can be 5 mm, 4 mm or 3 mm.

[0035] In this embodiment, the buffer layer 300 is a polyurethane insulation layer. Polyurethane material is soft, has good sealing and adhesion, and also has good buffering and protective performance. It can prevent the precision test piece from colliding with the rigid structure during placement and testing, and prevent the surface wear and structural damage of the test piece, so as to take into account the dual functions of auxiliary insulation and protection of the test piece.

[0036] In addition, the thickness of the buffer layer 300 is no more than 5mm to ensure that it has good thermal insulation performance while avoiding excessive thickness that would affect the volume of the entire thermal load test insulation device 10.

[0037] For example, the thickness of the buffer layer 300 can be 5 mm, 4 mm or 3 mm.

[0038] In some embodiments, the outer layer 100 is made of fiberglass. Fiberglass has high structural strength, is pressure-resistant, wear-resistant, antistatic, and corrosion-resistant, providing stable external rigid support for the entire thermal load testing insulation device 10, thereby improving the overall structural stability and deformation resistance of the thermal load testing insulation device 10, while also shielding against minor external electromagnetic interference.

[0039] Meanwhile, the thickness of the outer layer 100 is no more than 2mm, for example, it can be 2mm, 1.8mm or 1.6mm.

[0040] In some embodiments, the outer layer 100 and the foam glass insulation layer 210, the foam glass insulation layer 210 and the graphene insulation layer 220, the graphene insulation layer 220 and the vacuum insulation layer 230, and the vacuum insulation layer 230 and the buffer layer 300 are bonded together.

[0041] It should be noted that the adhesive bonding method allows for a tight fit between the structural layers, ensuring no gaps between them. This effectively eliminates air leakage and heat loss through gaps, improving the overall airtightness and integrity of the structure. It also prevents hot and cold air from seeping through interlayer gaps, further enhancing the overall thermal insulation and sealing effect, and ensuring a stable and controllable temperature environment inside the test chamber. Furthermore, the adhesive bonding method is simple and reliable, easy to process and assemble, and does not significantly increase manufacturing costs, making it suitable for mass production.

[0042] Reference Figures 1 to 3 As shown in the figure, this application embodiment also provides a thermal load testing system. The specific structure and implementation principle of the thermal load testing insulation device 10 in this embodiment are the same as those of the thermal load testing insulation device 10 provided in the above embodiment, and can bring the same or similar technical effects. They will not be described in detail here. For details, please refer to the description of the above embodiment.

[0043] Specifically, the thermal load testing system includes a multi-dimensional temperature measurement module 400, a temperature control module 500, a main control unit 600, and a thermal load testing insulation device 10.

[0044] The multi-dimensional temperature measurement module 400 is located in the heat load test insulation device and is configured to detect and acquire multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value inside the composite insulation layer 200, and the ambient temperature value outside the heat load test insulation device 10.

[0045] The main control unit 600 is electrically connected to the multi-dimensional temperature measurement module 400 and the temperature control module 500. The main control unit 600 receives multiple internal temperature values ​​and calculates a fused temperature value according to preset weights. Based on the fused temperature value, the main control unit 600 calculates the temperature deviation by comparing it with a preset target temperature value, and also calculates the internal and external temperature difference by comparing it with the ambient temperature value. The main control unit 600 controls the operating state of the temperature control module 500 based on the temperature deviation and the internal and external temperature difference to adjust the fused temperature within the allowable temperature deviation range of the target temperature value.

[0046] In this embodiment, the thermal load testing insulation device 10 serves as the test carrier, providing a sealed and stable thermal insulation testing environment for the test piece. The multi-dimensional temperature measurement module 400 is responsible for collecting temperature data, providing precise data support for temperature control. The temperature control module 500 is responsible for dynamically adjusting the internal temperature of the test chamber according to the instructions of the main control unit 600. The main control unit 600 receives the temperature measurement data, performs calculations and analysis, and outputs temperature control instructions to the temperature control module 500 to ultimately stabilize the temperature of the test chamber within the allowable deviation range of the target temperature value.

[0047] For example, the allowable temperature deviation is ±0.1℃.

[0048] In practice, the multi-dimensional temperature measurement module 400 is used to collect multiple internal temperature values ​​at different locations within the test cavity, the composite temperature value within the composite insulation layer 200, and the ambient temperature value outside the thermal load test insulation device 10, so as to achieve comprehensive temperature acquisition, that is, to achieve full-domain temperature coverage acquisition of the cavity-insulation layer-environment, thereby solving the defects of the existing technology that the single-point temperature measurement is not representative enough and cannot reflect the full-domain temperature distribution.

[0049] Specifically, the main control unit 600 establishes electrical connections with the multi-dimensional temperature measurement module 400 and the temperature control module 500, respectively, to achieve full-process control of data reception, calculation and analysis, and command output. Specifically, the main control unit 600 receives three types of temperature data transmitted in real time from the multi-dimensional temperature measurement module 400: multiple internal temperature values ​​within the test chamber, multiple composite temperature values ​​within the composite insulation layer 200, and the external ambient temperature value. For the multiple internal temperature values ​​within the test chamber, the main control unit 600 calculates a fused temperature value according to a preset weighting algorithm, thereby replacing the traditional single temperature acquisition mode, eliminating detection deviations caused by local temperature differences, and thus accurately reflecting the overall temperature state inside the test chamber.

[0050] Specifically, the formula for calculating the fusion temperature value using the preset weighting algorithm is: T 融 =0.16×(T1+T2+T3+T4+T5)+0.2×T6; where, T 融 The values ​​represent the fusion temperature. T1, T2, T3, T4, and T5 are the internal temperatures at various locations within the test chamber, excluding the bottom surface. T6 is the internal temperature at the bottom surface, which corresponds to the core heat-generating area of ​​the test piece and therefore has a higher weight, ensuring that the fusion temperature accurately matches the actual temperature environment of the test piece. The weights for T1-T5 are 0.16, and the weight for T6 is 0.2.

[0051] The main control unit 600 will calculate the fusion temperature value T. 融 Compared with the preset target temperature value T 目标 By comparison, the temperature deviation ΔT is calculated, i.e., ΔT = T融 -T 目标 At the same time, the fusion temperature value T will be... 融 Compared with the external ambient temperature value T 环 By comparison, the temperature difference ΔT between the test chamber and the outside environment was calculated. 环 That is, ΔT 环 =T 融 -T 环境 Temperature deviation ΔT is used to directly determine whether the temperature of the test chamber meets the test requirements; the internal and external temperature difference ΔT 环 It is used to help determine the degree of interference of the external environment on the temperature of the test chamber, and to provide dual data basis for subsequent temperature control and adjustment.

[0052] The main control unit 600 calculates the temperature deviation ΔT and the internal and external temperature difference ΔT. 环 Based on the preset temperature control strategy, the main control unit 600 outputs corresponding control commands to regulate the working state of the temperature control module 500, ultimately adjusting the fusion temperature to within the allowable deviation range of the target temperature value. Simultaneously, the main control unit 600 records and saves the composite temperature value within the composite insulation layer 200 for subsequent thermal resistance calculations, insulation performance verification, and anomaly warnings.

[0053] For example, the main control unit 600 preferably adopts an STM32F4 embedded main control unit 600, which interacts with the multi-dimensional temperature measurement module 400 and the temperature control module 500 through the CAN bus to achieve the requirements of real-time processing of multi-dimensional data and dynamic temperature control.

[0054] Reference Figure 2 and Figure 3 As shown, in some embodiments, the multi-dimensional temperature measurement module 400 includes a first temperature measurement component disposed in the test chamber. The first temperature measurement component includes at least six first temperature measurement sensors 410, which are respectively located on different surfaces of the test chamber to detect and acquire at least six internal temperature values.

[0055] In a specific implementation, the first temperature measuring component is located inside the test chamber and includes at least six first temperature measuring sensors 410. These at least six first temperature measuring sensors 410 are respectively installed on different surfaces of the test chamber, namely the front, back, left, right, top, and bottom of the test chamber. Specifically, they can be arranged at a position 1 / 3 of the side length from each corner of the inner wall to ensure that temperature data of different areas inside the test chamber can be collected comprehensively, so as to finally detect and obtain at least six internal temperature values.

[0056] For example, the first temperature sensor 410 can be a PT1000 platinum resistance sensor with an accuracy of ±0.01℃. The lead wire that connects to the main control unit 600 is a twisted-pair shielded wire, which can effectively avoid electromagnetic interference and ensure the accuracy of temperature acquisition.

[0057] In some embodiments, the composite insulation layer 200 includes a foam glass insulation layer 210, a graphene insulation layer 220, and a vacuum insulation layer 230 arranged sequentially from the outside to the inside. The multi-dimensional temperature measurement module 400 includes a second temperature measurement component, which includes at least three second temperature sensors 420. The at least three second temperature sensors 420 are respectively embedded in the foam glass insulation layer 210, the graphene insulation layer 220, and the vacuum insulation layer to detect and acquire at least three composite temperature values. This facilitates monitoring the heat transfer state inside the composite insulation layer 200 and timely detection of abnormalities such as local thermal bridging or insulation failure in the composite insulation layer 200. This provides data support for subsequent self-testing and avoids test errors caused by the failure of the composite insulation layer 200.

[0058] For example, the second temperature sensor 420 can be a PT1000 platinum resistance sensor with an accuracy of ±0.01℃. The lead wire that connects to the main control unit 600 is a twisted-pair shielded wire, which can effectively avoid electromagnetic interference and ensure the accuracy of temperature acquisition.

[0059] In some embodiments, the multi-dimensional temperature measurement module 400 further includes a third temperature sensor 430, which is located outside the heat load test insulation device 10 and is used to detect and acquire the ambient temperature value outside the heat load test insulation device 10 as an important data reference for temperature control and adjustment. It is used to calculate the internal and external temperature difference between the test cavity and the external environment so that the main control unit 600 can dynamically adjust the temperature control strategy to adapt to the insulation and temperature control requirements under different ambient temperatures and avoid the external ambient temperature fluctuations from interfering with the internal temperature stability of the test cavity.

[0060] For example, the third temperature sensor 430 can be a PT1000 platinum resistance sensor with an accuracy of ±0.01℃. The lead wire that connects to the main control unit 600 is a twisted-pair shielded wire, which can effectively avoid electromagnetic interference and ensure the accuracy of temperature acquisition.

[0061] Reference Figure 3 As shown, in some embodiments, the temperature control module 500 is an execution component that realizes precise temperature regulation. It is electrically connected to the main control unit 600 and is used to receive control commands output by the main control unit 600, thereby dynamically adjusting the internal temperature of the test chamber to solve the defects of large fluctuations and slow response of the current start-stop temperature control.

[0062] Specifically, the temperature control module 500 includes a heating unit, a cooling unit, and a blower, all electrically connected to the main control unit 600. These three components work together to achieve continuous and precise temperature adjustment of the test chamber. Further details are as follows: The heating unit can use ceramic heating elements, which have the characteristics of high heating efficiency and high temperature control accuracy. The power adjustment accuracy can reach 1%, and then continuous power adjustment can be realized according to the instructions output by the main control unit 600. This allows for rapid heat replenishment when the fusion temperature of the test chamber is lower than the preset target temperature, thus avoiding a lag in temperature rise.

[0063] The cooling unit can be a semiconductor cooling unit with a continuously adjustable cooling capacity of 0W-300W. It is used to quickly cool down the test chamber when the fusion temperature is higher than the preset target temperature, so as to meet the temperature control requirements of high temperature test scenarios and avoid the problem of large temperature fluctuations in traditional cooling methods.

[0064] The blower can be a miniature heat dissipation fan with stepless speed regulation to promote air convection inside the test chamber, so that the internal temperature of the test chamber is evenly distributed and local temperature differences are eliminated. At the same time, it assists the heating and cooling units to quickly adjust the temperature, thereby further improving the temperature control uniformity and response speed.

[0065] In summary, the temperature control module 500 of this embodiment abandons the traditional start-stop adjustment mode and adopts a continuous power adjustment method. Through the coordinated operation of the heating unit, cooling unit and blowing component, it can quickly respond to the instructions output by the main control unit 600 and accurately adjust the temperature of the test chamber, thereby effectively reducing the temperature fluctuation range.

[0066] The thermal load testing system of this embodiment will be further described in detail below with reference to specific embodiments: For the thermal load testing insulation device 10, from the outside to the inside, it consists of a 2mm thick fiberglass plate, a 10mm thick foam glass insulation layer 210, a 10mm thick graphene insulation layer 220, a 5mm thick vacuum insulation layer 230, and a 5mm thick polyurethane buffer layer 300. Each layer is bonded together with a high-temperature resistant and odorless adhesive. The inner cavity of the buffer layer 300 forms a 30cm×30cm×30cm test cavity for accommodating a precision test piece.

[0067] For the multi-dimensional temperature measurement module 400, the first temperature measurement component includes six PT1000 platinum resistance sensors, which are respectively installed on the six inner walls of the test chamber at a distance of 1 / 3 of the side length from the corners; the second temperature measurement component includes three PT1000 sensors, which are respectively embedded inside the foam glass insulation layer 210, the graphene insulation layer 220, and the vacuum insulation layer 230; the third temperature measurement sensor 430 is installed on the outer wall of the outer layer plate 100 and is used to collect the ambient temperature.

[0068] The temperature control module 500 includes a ceramic heating element, a semiconductor cooling unit, and a miniature heat dissipation fan, all of which are electrically connected to the main control unit 600.

[0069] In this embodiment, taking a precision chip as the test piece and conducting a thermal load test at a preset temperature of 70°C as an example, the entire operation process is briefly described as follows: First, the target temperature T is set via the main control unit 600. 目标 =70℃, allowable temperature deviation ±0.1℃, load the corresponding temperature control parameters.

[0070] Then, the multi-dimensional temperature measurement module 400 collects the internal temperature value through six first temperature sensors 410 in the acquisition cavity, collects the composite temperature value through three second temperature sensors 420, and collects the ambient temperature value through one third temperature sensor 430, with a period of 100ms, and transmits them to the main control unit 600.

[0071] Then, the main control unit 600 calculates the fusion temperature value, temperature deviation, and internal / external temperature difference according to preset weights. For example, during a 70℃ test, the detected internal temperature values ​​are 24.3℃, 24.5℃, 24.2℃, 24.4℃, 24.6℃, and 24.7℃, with the first five values ​​having a weight of 0.16 and the last value having a weight of 0.2. Therefore, the fusion temperature value T... 融 =0.16×(24.3+24.5+24.2+24.4+24.6)+0.2×24.7≈24.45℃. Temperature deviation ΔT=24.45-70=-45.55℃, internal and external temperature difference ΔT 环 =24.45-24.0=0.45℃.

[0072] Finally, the main control unit 600, based on ΔT, ΔT 环 Through the preset formula U=K p ×ΔT+K i ×∫(ΔT)dt+K d The ×ΔT loop calculates the output control quantity, and adjusts the operating power and operating time of the heating unit, cooling unit, and blower based on the output control quantity.

[0073] Repeat the above steps until the fusion temperature T is reached. 融 The temperature remained stable within the range of 69.9℃-70.1℃, and the temperature fluctuation did not exceed ±0.1℃ throughout the entire process, indicating that the test data was accurate and reliable.

[0074] Specifically, when U is greater than -50, the cooling unit is on, the heating unit is off, and the speed of the blower is 10%-30% of the rated speed; when U is greater than -100 and less than -50, the cooling unit is on, the output power of the heating unit is 5%-10% of the rated power, and the speed of the blower is 30%-65% of the rated speed; when U is less than -100, the cooling unit is off, the output power of the heating unit is 15%-20% of the rated power, and the speed of the blower is 65%-100% of the rated speed.

[0075] Reference Figure 4 As shown, this embodiment also provides a test method for temperature testing using a thermal load testing system, including: S1. Set at least two sets of target temperature values ​​to be tested, allowable temperature deviation, and temperature control parameters corresponding to the target temperature values ​​through the main control unit 600, and perform a self-test on the thermal load test system. S2. The multi-dimensional temperature measurement module 400 controls the detection and acquisition of multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value inside the composite insulation layer 200, and the ambient temperature value outside the heat load test insulation device 10. S3. The main control unit 600 receives multiple internal temperature values ​​and calculates a fused temperature value according to a preset weight; the main control unit 600 calculates the temperature deviation based on the fused temperature value and compares it with a preset target temperature value, and calculates the internal and external temperature difference by comparing it with the ambient temperature value; the main control unit 600 records and saves the composite temperature value. S4. The main control unit 600 controls the working status of the temperature control module 500 based on the temperature deviation and the internal and external temperature difference, and dynamically adjusts the temperature control parameters based on the temperature deviation; the working status includes start / stop, operating power and running time. S5. Repeat steps S2-S4 until the fusion temperature is adjusted to within the allowable temperature deviation of the target temperature value.

[0076] In practice, step S1 is the core of test preparation, and the specific operations are as follows: The test-related parameters are set via the main control unit 600, specifically including at least two sets of target temperature values, allowable temperature deviation, and temperature control parameters corresponding to each set of target temperature values. Specifically, the target temperature values ​​may include, for example, a room temperature test value of 25℃, a medium temperature test value of 45℃, and a high temperature test value of 70℃. The temperature control parameters include a proportionality coefficient K. p Integral coefficient K i Differential coefficient K d Different target temperatures correspond to different temperature control parameters, such as K at 70℃. p =3.2、K i =0.15, K d =1.1, K at 45℃p =3.0, K i =0.18, K d =1.05, K at 25℃ p =2.8, K i =0.2、K d =1.0.

[0077] After the parameters are set, the thermal load testing system is started for a comprehensive self-check. The self-check scope includes: whether the signals of each sensor in the multi-dimensional temperature measurement module 400 are normal; whether the heating unit, cooling unit, and blower of the temperature control module 500 can respond to commands normally; whether the data interaction between the main control unit 600 and the multi-dimensional temperature measurement module and the temperature control module 500 is smooth; and whether the sealing performance of the thermal load testing insulation device 10 is good. Only after the self-check is passed can the subsequent testing steps be carried out; if the self-check fails, the main control unit 600 will issue a corresponding warning to remind the staff to troubleshoot the fault and avoid test data distortion or test interruption due to system failure.

[0078] Step S2 is the data acquisition stage. The core of this stage is to use the multi-dimensional temperature measurement module 400 to acquire the temperature across the entire range from the test chamber to the composite insulation layer 200 and the external environment, providing accurate data support for subsequent data processing and temperature control. The specific operation is as follows: The main control unit 600 outputs control commands to control the multi-dimensional temperature measurement module 400 to start working. According to a preset cycle, such as setting 100ms as a collection cycle, it simultaneously completes the detection and collection of three types of temperature data.

[0079] The first type of temperature data consists of multiple internal temperature values ​​at different locations within the test chamber. Specifically, these values ​​are collected by at least six first temperature sensors 410 of the first temperature measuring component to detect and acquire six internal temperature values, denoted as T1-T6. T6 is the temperature value at the bottom surface, corresponding to the core heat-generating area of ​​the test piece.

[0080] The second type of temperature data is the composite temperature value within the composite insulation layer 200, specifically collected by at least three second temperature sensors 420 of the second temperature sensing component. These three sensors 420 are respectively embedded within the foam glass insulation layer 210, the graphene insulation layer 220, and the vacuum insulation layer 230, and each detects and acquires three composite temperature values, denoted as T. 保1 -T 保3 It is used to monitor the heat transfer status of the insulation layer.

[0081] The third type of temperature data is the ambient temperature outside the thermal load testing insulation device 10. Specifically, the temperature is collected by the third temperature sensor 430 located on the outer wall of the thermal load testing insulation device 10, and denoted as T. 环境 .

[0082] After the data acquisition is completed, the multi-dimensional temperature measurement module 400 transmits all temperature data to the main control unit 600 in real time.

[0083] Step S3 is the data processing stage. Specifically, the main control unit 600 performs calculations and analysis on the collected temperature data to obtain the key parameters required for temperature control and regulation, and completes data recording. The specific operation is as follows: First, the fusion temperature value is calculated: the main control unit 600 receives multiple internal temperature values ​​(T1-T6) within the test cavity and calculates the fusion temperature value T according to a preset weighting algorithm. 融 .

[0084] Then, the temperature deviation and internal / external temperature difference are calculated: the main control unit 600 will calculate the fusion temperature value T. 融 Compared with the preset target temperature value T 目标 By comparison, the temperature deviation ΔT is calculated using the formula: ΔT = T 融 -T 目标 A positive ΔT indicates that the test chamber temperature is higher than the target temperature, while a negative ΔT indicates that it is lower than the target temperature. This is used to directly determine whether the temperature meets the test requirements. Meanwhile, T... 融 With ambient temperature value T 环境 By comparison, the internal and external temperature difference ΔT was calculated. 环 The calculation formula is: ΔT_ring = T 融 -T 环境 It is used to determine the degree of interference of the external environment on the temperature of the test chamber.

[0085] Finally, data recording and saving are performed, that is, the main control unit 600 records and saves the composite temperature value T within the composite insulation layer 200 in real time. 保1 -T 保3 Simultaneously record the fusion temperature value T. 融 Temperature deviation ΔT, internal and external temperature difference ΔT 环 Data such as...

[0086] Step S4 is the core temperature control step. The core is that the main control unit 600 dynamically adjusts the working state of the temperature control module 500 based on the data calculation results to achieve precise and stable temperature control in the test chamber. The specific operation is as follows: The main control unit 600 calculates the temperature deviation ΔT and the internal and external temperature difference ΔT. 环 The system calculates the output control quantity and then controls the operating state of the temperature control module 500 based on this quantity. Specifically, this includes controlling the start / stop, operating power, and operating duration of the heating unit, cooling unit, and blower. Simultaneously, it dynamically adjusts the temperature control parameters based on temperature deviations to ensure the temperature quickly stabilizes within the allowable temperature difference range of the target value.

[0087] After completing one temperature control adjustment, the system repeats steps S2-S4, that is, it collects the global temperature data again, performs data calculation again, and adjusts the temperature control state again until the fusion temperature value T_fusion stabilizes within the allowable deviation range of the target temperature value, such as 70℃±0.1℃. At this time, the test chamber temperature meets the test requirements and can enter the stabilization stage of the subsequent thermal load test, continuously collecting and recording test data.

[0088] In some embodiments, prior to step S1, the test method further includes: The thermal resistance parameters of the composite insulation layer 200 and the buffer layer 300 corresponding to the target temperature value are set by the main control unit 600; wherein, the thermal resistance parameters include thickness and thermal conductivity. The thermal resistance values ​​of the composite insulation layer 200 and the buffer layer 300 are calculated by the main control unit 600 based on the thermal resistance parameters; where the thermal resistance value is the ratio of the thickness to the thermal conductivity. The main control unit 600 calculates the sum of all thermal resistance values ​​to obtain the total thermal resistance and compares it with the preset total thermal resistance threshold to detect whether the total thermal resistance is within the preset deviation range, and issues an early warning when it exceeds the preset deviation range.

[0089] In this embodiment, before step S1, the test method adds a thermal resistance self-test step, which specifically includes the following steps: 1. Thermal resistance parameter setting: The thermal resistance parameters of the composite insulation layer 200 and the buffer layer 300 are set through the main control unit 600. The thermal resistance parameters include the thickness δ of each layer material and the thermal conductivity λ.

[0090] For example, the parameters in this embodiment are set as follows: the thickness of the foam glass insulation layer 210 is 10 mm, λ = 0.055 W / (m·K); the thickness of the graphene insulation layer 220 is 10 mm, λ = 0.028 W / (m·K); the thickness of the vacuum insulation layer 230 is 5 mm, λ = 0.008 W / (m·K); and the thickness of the polyurethane buffer layer 300 is 5 mm, λ = 0.021 W / (m·K).

[0091] 2. Thermal resistance calculation: Based on the set thermal resistance parameters, the main control unit 600 calculates the thermal resistance values ​​of each layer of the composite insulation layer 200 and the buffer layer 300 according to the thermal resistance calculation formula R=δ / λ, where R is the thermal resistance value, δ is the material thickness, and λ is the thermal conductivity.

[0092] For example, according to the parameter settings of this embodiment, the thermal resistance values ​​of each layer are calculated as follows: thermal resistance value R1 of foam glass insulation layer 210 = 0.01m / 0.055W / (m·K) ≈ 0.18m²·K / W, thermal resistance value R2 of graphene insulation layer 220 = 0.01m / 0.028W / (m·K) ≈ 0.36m²·K / W, thermal resistance value R3 of vacuum insulation layer 230 = 0.005m / 0.008W / (m·K) = 0.625m²·K / W, thermal resistance value R4 of polyurethane buffer layer 300 = 0.005m / 0.021W / (m·K) ≈ 0.24m²·K / W.

[0093] 3. Thermal Resistance Verification and Early Warning: The main control unit 600 calculates the sum of the thermal resistance values ​​of each layer to obtain the total thermal resistance, R. 总 =R1+R2+R3+R4, in this embodiment, R 总 ≈1.405 m²·K / W. Then, the total thermal resistance is compared with the preset total thermal resistance threshold to check if it is within the preset deviation range. If the total thermal resistance exceeds the preset deviation range by 10%, the main control unit 600 immediately issues an early warning, reminding staff to check whether the composite insulation layer 200 and the buffer layer 300 are loose, damaged, or damp. After verification, the thermal resistance is re-calibrated until the total thermal resistance meets the requirements.

[0094] In some embodiments, the test method satisfies: T 融 =0.16×(T1+T2+T3+T4+T5)+0.2×T6; where, T 融 The fusion temperature values ​​are T1, T2, T3, T4, and T5, which are the internal temperature values ​​at various locations within the test chamber excluding the bottom surface, and T6 is the internal temperature value at the bottom surface. ΔT=T 融 -T 目标 Where ΔT is the temperature deviation, T 目标 The target temperature value; ΔT 环 =T 融 -T 环境 ; where ΔT 环 For the temperature difference between inside and outside, T 环境 This represents the ambient temperature value.

[0095] For example, when tested at 70°C, K p =3.2、K i =0.15, K d =1.1. The detected temperatures were T1=24.3℃, T2=24.5℃, T3=24.2℃, T4=24.4℃, T5=24.6℃, and T6=24.7℃. The main control unit 600, according to formula T... 融=0.16×(24.3+24.5+24.2+24.4+24.6)+0.2×24.7≈24.45℃, the fusion temperature T is calculated. 融 The temperature deviation ΔT is calculated as 24.45 - 70 = -45.55℃, and the internal and external temperature difference ΔT is... 环 =24.45-24.0=0.45℃.

[0096] In some embodiments, the method by which the main control unit 600 controls the operating state of the temperature control module 500 based on the temperature deviation and the internal and external temperature difference includes: The main control unit 600 calculates the output control quantity of the temperature control module 500 based on the temperature deviation and the internal and external temperature difference, and automatically adjusts the working state of the temperature control module 500 according to the output control quantity. Among them, the main control unit 600 calculates the output control quantity of the temperature control module 500 according to the temperature control parameters, temperature deviation and internal and external temperature difference corresponding to the target temperature value according to the preset formula; The default formula is: U=K p ×ΔT+K i ×∫(ΔT)dt+K d ×ΔT 环 Among them, K p The proportional coefficient of the temperature control parameters, K i The integral coefficient of the temperature control parameter, K d Let U be the differential system of the temperature control parameters, U be the output control quantity, and t be the temperature detection period. The main control unit 600 adjusts the working status of the temperature control module 500 based on the output control quantity; The main control unit 600 dynamically adjusts the temperature control parameters according to the temperature deviation by reducing the temperature control parameters when the temperature deviation is less than the preset temperature difference.

[0097] For example, based on the above calculations, ΔT = -45.55℃, ΔT 环 =0.45℃, then U=3.2×(-45.55)+0.15×∫(-45.55)dt+1.1×(0.45), after calculating the output control quantity U, it is used to adjust the operating status of each unit of the temperature control module 500.

[0098] Specifically, the example above calculates U to be -145.265. At this point, the heating unit can be controlled to operate at 15% of its rated power, the cooling unit can be turned off, and the blower can operate at 80% of its rated speed to promote uniform heat distribution. After repeating steps S2-S4 for 30 minutes, T... 融 The temperature rises to 69.8℃, ΔT = -0.2℃, and the main control unit 600 dynamically adjusts the temperature control parameters to K. p =2.0, K i =0.3, Kd =1.2, heating power reduced to 40%; after 45 minutes, T 融 The temperature stabilized within the range of 69.92℃-70.08℃; at 60 minutes, the electronic device was loaded to full power (10W), T 融 The temperature briefly dropped to 69.85℃ (ΔT = -0.15℃). The system responded quickly, temporarily increasing the heating power to 55% and recovering to 70.0℃ within 10 seconds. The temperature fluctuation throughout the test did not exceed ±0.1℃, meeting the testing requirements and entering the stable testing phase. Specific U-values ​​and the operating states of the heating unit, air blower, and cooling unit can be set according to the corresponding setting rules based on specific needs.

[0099] Furthermore, the main control unit 600 dynamically adjusts the temperature control parameters based on the magnitude of the temperature deviation ΔT. Specifically, when the temperature deviation is less than a preset temperature difference, such as when the absolute value of ΔT is <0.2℃, the temperature control parameters are reduced, for example, by decreasing K. p To avoid excessive temperature adjustment leading to fluctuations; when the temperature deviation is large, increase the temperature control parameters, such as increasing K. p This improves the speed of temperature control response, ensuring rapid and stable temperature with minimal fluctuations.

[0100] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0101] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A thermal load testing and insulation device, characterized in that, It includes an outer layer plate, a composite insulation layer and a buffer layer arranged sequentially from the outside to the inside, and the inner cavity of the buffer layer forms a test cavity to accommodate the test piece; The composite insulation layer has at least one side facing the buffer layer and at least one side facing the outer layer plate made of different materials.

2. The thermal load testing and insulation device according to claim 1, characterized in that, The composite insulation layer includes, from the outside to the inside, a foam glass insulation layer, a graphene insulation layer, and a vacuum insulation layer.

3. The thermal load testing and insulation device according to claim 2, characterized in that, The thickness of the foam glass insulation layer is no more than 10mm; The thickness of the silicon graphene insulation layer is no more than 10 mm; The thickness of the vacuum insulation layer is no more than 5 mm; The buffer layer includes a polyurethane insulation layer; The thickness of the buffer layer is no greater than 5 mm; The outer layer includes a fiberglass plate; The thickness of the outer layer plate is no more than 2 mm; The outer layer and the foam glass insulation layer, the foam glass insulation layer and the graphene insulation layer, the graphene insulation layer and the vacuum insulation layer, and the vacuum insulation layer and the buffer layer are bonded together.

4. A thermal load testing system, characterized in that, It includes a multi-dimensional temperature measurement module, a temperature control module, a main control unit, and a heat load testing and insulation device as described in any one of claims 1 to 3; The multi-dimensional temperature measurement module is located in the heat load test insulation device and is configured to detect and acquire multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value in the composite insulation layer, and the ambient temperature value outside the heat load test insulation device. The main control unit is electrically connected to the multi-dimensional temperature measurement module and the temperature control module respectively. The main control unit is used to receive multiple internal temperature values ​​and calculate a fused temperature value according to a preset weight. The main control unit calculates the temperature deviation based on the fused temperature value and compares it with a preset target temperature value, and calculates the internal and external temperature difference based on the comparison with the ambient temperature value. The main control unit controls the working state of the temperature control module according to the temperature deviation and the internal and external temperature difference, so as to adjust the fusion temperature to the allowable temperature deviation range of the target temperature value.

5. The thermal load testing system according to claim 4, characterized in that, The multi-dimensional temperature measurement module includes a first temperature measurement component disposed in the test chamber. The first temperature measurement component includes at least six first temperature sensors, which are respectively located on different surfaces of the test chamber to detect and acquire at least six internal temperature values. The composite insulation layer includes a foam glass insulation layer, a graphene insulation layer, and a vacuum insulation layer arranged sequentially from the outside to the inside. The multi-dimensional temperature measurement module includes a second temperature measurement component, which includes at least three second temperature sensors. The at least three second temperature sensors are respectively embedded in the foam glass insulation layer, the graphene insulation layer, and the vacuum insulation layer to detect and acquire at least three composite temperature values. The multi-dimensional temperature measurement module also includes a third temperature sensor, which is located outside the heat load test insulation device and is used to detect and acquire the ambient temperature value outside the heat load test insulation device.

6. The thermal load testing system according to claim 4, characterized in that, The temperature control module includes a heating unit, a cooling unit, and a blower, all electrically connected to the main control unit.

7. A method for temperature testing using the thermal load testing system as described in any one of claims 4 to 6, characterized in that, include: S1. Set at least two sets of target temperature values ​​to be tested, allowable temperature deviation, and temperature control parameters corresponding to the target temperature values ​​through the main control unit, and perform a self-test on the thermal load test system. S2. Control the multi-dimensional temperature measurement module to detect and acquire multiple internal temperature values ​​at different locations in the test chamber, the composite temperature value inside the composite insulation layer, and the ambient temperature value outside the thermal load test insulation device. S3. The main control unit receives multiple internal temperature values ​​and calculates a fusion temperature value according to a preset weight. The main control unit calculates the temperature deviation based on the fused temperature value and compares it with the preset target temperature value, and calculates the internal and external temperature difference based on the comparison with the ambient temperature value; the main control unit records and saves the fused temperature value. S4. The main control unit controls the working state of the temperature control module and dynamically adjusts the temperature control parameters according to the temperature deviation and the internal and external temperature difference; the working state includes start / stop, operating power, and operating time. S5. Repeat steps S2-S4 until the fusion temperature is adjusted to within the allowable temperature deviation range of the target temperature value.

8. The test method according to claim 7, characterized in that, Prior to step S1, the test method further includes: The thermal resistance parameters of the composite insulation layer and buffer layer corresponding to the target temperature value are set by the main control unit; wherein, the thermal resistance parameters include thickness and thermal conductivity. The thermal resistance values ​​of the composite insulation layer and the buffer layer are calculated by the main control unit based on the thermal resistance parameters; wherein, the thermal resistance value is the ratio of the thickness to the thermal conductivity. The total thermal resistance is obtained by summing the thermal resistance values ​​of each component through the main control unit and compared with a preset total thermal resistance threshold to detect whether the total thermal resistance is within a preset deviation range, and to issue an early warning when it exceeds the preset deviation range.

9. The test method according to claim 7, characterized in that, The test method satisfies: T 融 = 0.16 x (T1+T2+T3+T4+T5) + 0.2 x T6; wherein, T 融 T1, T2, T3, T4, T5 are internal temperature values at respective positions in the test chamber other than the bottom surface, and T6 is an internal temperature value at the bottom surface. ΔT=T 融 -T 目标 Where ΔT is the temperature deviation, T 目标 The target temperature value; ΔT 环 =T 融 -T 环境 ; where ΔT 环 For the temperature difference between inside and outside, T 环境 This represents the ambient temperature value.

10. The test method according to claim 9, characterized in that, The method for controlling the working state of the temperature control module by the main control unit based on the temperature deviation and the internal and external temperature difference includes: The main control unit calculates the output control quantity of the temperature control module based on the temperature deviation and the internal and external temperature difference, and automatically adjusts the working state of the temperature control module based on the output control quantity. The main control unit calculates the output control quantity of the temperature control module according to the temperature control parameters corresponding to the target temperature value, the temperature deviation, and the internal and external temperature difference according to a preset formula. The preset formula is: U=K p ×ΔT+K i ×∫(ΔT)dt+K d ×ΔT ring; where K p The proportional coefficient of the temperature control parameters, K i The integral coefficient of the temperature control parameter, K d Let U be the differential system of the temperature control parameters, U be the output control quantity, and t be the temperature detection period. The main control unit adjusts the working state of the temperature control module based on the output control quantity; The method by which the main control unit dynamically adjusts the temperature control parameter according to the temperature deviation includes: reducing the temperature control parameter when the temperature deviation is less than a preset temperature difference.

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