Device and method for testing temperature control effect of cooling coating of power equipment

Abstract

The invention relates to the technical field of power equipment heat dissipation, and discloses a device and method for testing the temperature control effect of a cooling coating of power equipment, and the device comprises a housing which is internally provided with a test cavity for placing a power equipment simulation box; the heating end of the heat source simulation heater extends into the electrical equipment simulation box; the environment simulation system comprises a humidity adjusting unit used for adjusting the humidity in the test cavity, a heating unit used for adjusting the temperature in the test cavity and a solar radiation simulation light source used for adjusting the illumination intensity in the test cavity; and the temperature detection system comprises a data acquisition module, a first temperature sensor used for detecting the temperature of the outer side of the power equipment simulation box and a second temperature sensor used for detecting the temperature in the power equipment simulation box, and the data acquisition module acquires and records temperature data at the two positions. The device can accurately quantify the temperature drop effect brought by the coating and ensure the stability and repeatability of the test result.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology for power equipment, and in particular to a testing device and method for the temperature control effect of cooling coatings on power equipment. Background Technology

[0002] During long-term operation, the combined effect of internal heat generation and high external temperatures can easily lead to equipment aging, decreased insulation performance, and even malfunctions and shutdowns in power equipment. In recent years, with the development of materials science, cooling coatings have gradually attracted attention. This method has advantages such as simple construction, relatively low cost, no additional energy consumption, no alteration to the original equipment structure, and wide applicability, demonstrating great application potential in the field of thermal management of power equipment.

[0003] However, accurately evaluating and verifying the temperature control effect of such cooling coatings on actual power equipment faces numerous challenges. Currently, most methods characterize the heat dissipation performance of coatings based on material-level standards, such as testing thermophysical parameters like infrared emissivity, solar reflectivity, and thermal conductivity. These tests are typically conducted on coating samples under standard laboratory conditions. While they reflect the basic performance of the coating itself, they cannot fully simulate the comprehensive temperature control performance of coatings on actual power equipment with complex shapes, dynamic heat loads, and varying environmental factors. Regarding temperature rise testing of power equipment, existing standards such as GB / T 1094.2 and DL / T 593 primarily focus on the temperature rise limit of the equipment itself under rated operating conditions. Their testing methods typically involve loading uncoated equipment under specific test environments, making it difficult to effectively distinguish and quantify the cooling contribution of the coating.

[0004] Therefore, existing technologies still struggle to accurately and efficiently evaluate the actual temperature control effect of cooling coatings on power equipment. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a testing device for the temperature control effect of cooling coatings on power equipment, which can accurately quantify the temperature reduction effect brought about by the coating and ensure the stability and repeatability of the test results.

[0006] The specific technical solution of the present invention is: a testing device for the temperature control effect of a cooling coating on power equipment, wherein the testing device is the aforementioned testing device, comprising: The casing contains a test chamber for housing a power equipment simulation box; A heat source simulation heater, whose heating end extends into the interior of a power equipment simulation box to simulate the heating state of the heating element of the power equipment; The environmental simulation system includes a humidity control unit for regulating the humidity inside the test chamber, a heating unit for regulating the temperature inside the test chamber, and a solar radiation simulation light source for regulating the light intensity inside the test chamber. The temperature detection system includes a data acquisition module, a first temperature sensor for detecting the temperature outside the power equipment simulation box, and a second temperature sensor for detecting the temperature inside the power equipment simulation box. The data acquisition module is electrically connected to the first and second temperature sensors to simultaneously acquire and record temperature data from both locations.

[0007] The power equipment simulation chamber can be customized to match the surface geometry of different power equipment, overcoming the limitation of traditional material-level testing in failing to accurately reproduce the equipment's structural integrity. The heat source simulation heater extends into the chamber, allowing for adjustment of heat flux density or heating power to precisely simulate the equipment's heat source characteristics. The environmental simulation system can regulate ambient temperature and simulate key factors such as solar radiation, more realistically reproducing the coating's working environment under actual conditions. The temperature detection system simultaneously collects internal and external temperatures and calculates the temperature rise of the power equipment simulation chamber, thereby evaluating the cooling effect of the coating. By precisely controlling the heat source and environmental parameters and employing a high-precision temperature measurement unit, the above testing device can accurately quantify the temperature reduction effect of the coating and ensure the stability and repeatability of the test results.

[0008] Optionally, the solar radiation simulation light source is a xenon arc lamp or a metal halide lamp.

[0009] In the above technical solutions, xenon arc lamps or metal halide lamps can effectively cover the main bands of the solar spectrum, especially in the visible and near-infrared regions where they have a high spectral matching degree. This allows them to truly reproduce the effect of natural sunlight on the cooling coating, thereby more accurately evaluating the thermal regulation performance of the coating in practical outdoor applications.

[0010] Optionally, the solar radiation simulation light source is located inside the test chamber and directly above the power equipment simulation box.

[0011] In the above technical solution, this layout ensures that light is uniformly irradiated onto the coating surface, thereby improving the environmental simulation of the test.

[0012] Optionally, the environmental simulation system further includes a rotary motor connected to the solar radiation simulation light source to drive the solar radiation simulation light source to rotate around the vertical central axis of the power equipment simulation box.

[0013] In the above technical solutions, for power equipment simulation boxes with complex geometries, fixed light sources are prone to localized irradiation blind spots. A solar radiation simulation light source that rotates around an axis allows light to cover the simulation box surface from different directions, and its rotation speed is adjustable, ensuring that all areas of the coating receive uniform and comprehensive irradiation. This avoids test data deviations caused by areas not receiving irradiation, thus improving the accuracy of cooling coating evaluation.

[0014] Optionally, the humidity control unit includes a humidity generator and an air duct. The humidity generator is located on the outside of the housing, and one end of the air duct is connected to the air outlet of the humidity generator, while the other end extends through the side wall of the housing into the test chamber to introduce moisture into the test chamber. In the above technical solution, this installation method can prevent the humidity control unit from overheating due to high temperature buildup in the simulated environment of the test chamber, thus ensuring its stable operation.

[0015] Optionally, the first temperature sensor is located on the outside of the power equipment simulation box and is spaced apart from the outer surface of the power equipment simulation box, and the second temperature sensor is fixed at the center of the inside of the power equipment simulation box and is spaced apart from the inner wall of the power equipment simulation box and the heat source simulation heater.

[0016] In the above technical solution, the first temperature sensor is spaced apart from the outer surface of the power equipment simulation box, which can avoid interference from heat conduction due to direct contact with the simulation box, thereby ensuring that the collected temperature is the real ambient temperature of the power equipment simulation box in the test chamber; the second temperature sensor is spaced apart from the inner wall of the box and the heat source simulation heater to avoid interference from the two, and it is located in the center of the power equipment simulation box, in a stable thermal field inside the simulation box, which better reflects the internal temperature rise characteristics of the coating under complex thermal environment, further improving the accuracy and reliability of the test data.

[0017] Optionally, the housing is an openable structure, so that the power equipment simulation box, the heat source simulation heater connected to the power equipment simulation box, and the temperature detection system can be removed from the test chamber and placed in the outdoor natural environment for testing the temperature control effect of the cooling coating.

[0018] In the above technical solution, if it is necessary to test the temperature control effect of the cooling coating in the actual service atmospheric environment, the power equipment simulation box, heat source simulation heater, first temperature sensor, second temperature sensor and data acquisition module can be placed in the actual outdoor atmospheric environment. This set of devices has multiple testing functions.

[0019] Another specific technical solution of the present invention is: a test method for the temperature control effect of a cooling coating for power equipment, comprising the following steps: Step 100: Place the power equipment simulation box coated with the cooling coating into the test device, collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box, and record the temperature rise value Ta after T2 stabilizes, where Ta = T2 - T1; Step 200: Place the power equipment simulation box with the protective coating into the test device, collect the external temperature T3 and the internal temperature T4 of the power equipment simulation box, and record the temperature rise value Tb after T4 stabilizes, where Tb = T4 - T3; Step 300: Compare Ta and Tb. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect. The execution order of steps 100 and 200 can be interchanged or performed simultaneously; the testing device in steps 100 and 200 is the aforementioned testing device and the environmental parameters during testing are the same.

[0020] In the above test method, the cooling coating simulation chamber in step 100 is the experimental group, and the protective coating simulation chamber in step 200 is the control group. The protective coating only has basic equipment protection functions and no active or passive cooling thermal management characteristics. Its corresponding internal and external temperature difference Tb can be used as the reference heat exchange difference of the equipment when there is no effective cooling measures. The temperature difference Ta of the experimental group is the actual difference after the cooling coating participates in heat exchange. The comparison between the two can effectively eliminate the interference of non-coating factors such as equipment structure and inherent environmental thermal field. The difference between the two is essentially the change of the cooling coating on the internal and external heat transfer of the equipment. Through the quantitative comparison of the internal and external temperature differences, the temperature control performance of the cooling coating under complex working conditions can be truly reflected, and its actual temperature control effect can be accurately and efficiently quantified.

[0021] Optionally, in step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T4 is determined to be stable.

[0022] The testing process of this invention is as follows: First, the cooling coating to be tested is uniformly applied to the surface of a power equipment simulation box. A heat source simulation heater is installed inside the power equipment simulation box. A first temperature sensor and a second temperature sensor are installed on the outer side and the middle of the inside of the power equipment simulation box, respectively. The heat source simulation heater, solar radiation simulation light source, rotary motor, humidity adjustment unit, heating unit, and data acquisition module are turned on. The external temperature T1 and the internal temperature T2 of the power equipment simulation box are recorded and collected in real time. After T2 stabilizes, the test result of the second temperature sensor is subtracted from the test result of the first temperature sensor to obtain the temperature rise value Ta after the cooling coating is applied. Then, for the power equipment simulation box with the protective coating, the test is carried out under the same test conditions, and the external temperature T3 and the internal temperature T4 of the power equipment simulation box are recorded and collected. After T4 stabilizes, the temperature rise value Tb of the power equipment simulation box is calculated. The temperature rise values ​​of the two power equipment simulation boxes are compared and analyzed to obtain the temperature control effect of the cooling coating.

[0023] Compared with the prior art, the present invention has at least the following advantages: (1) The test device of the present invention can simulate the typical heat source characteristics (such as adjustable heat flux density or internal heating power) and surface geometric features of power equipment, and can integrate an environmental simulation unit to control the ambient temperature and simulate key factors such as solar radiation, so as to more realistically reproduce the working environment of the coating under actual working conditions; by accurately controlling the heat source, environmental parameters and using a high-precision temperature measurement unit, the cooling effect brought by the coating can be accurately quantified, and the stability and repeatability of the test results can be guaranteed; at the same time, if it is necessary to test the temperature control effect of the cooling coating in the actual service atmospheric environment, the power equipment simulation box, heat source simulation heater and temperature detection system can be placed in the actual outdoor atmospheric environment. This set of devices has multiple testing functions. (2) In the test method of the present invention, the cooling coating simulation box in step 100 is the experimental group, and the protective coating simulation box in step 200 is the control group. The protective coating only has basic equipment protection function and no active or passive cooling thermal management characteristics. Its corresponding internal and external temperature difference Tb can be used as the reference heat exchange difference of the equipment when there is no effective cooling measures. The temperature difference Ta of the experimental group is the actual difference after the cooling coating participates in heat exchange. The comparison formed by the two can effectively eliminate the interference of non-coating factors such as equipment structure and inherent thermal field of environment. The difference between the two is essentially the change of the cooling coating on the internal and external heat transfer of the equipment. Through the quantitative comparison of the internal and external temperature difference, the temperature control performance of the cooling coating under complex working conditions can be truly reflected, and its actual temperature control effect can be accurately and efficiently quantified. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the testing device of the present invention.

[0025] The attached figures are labeled as follows: 1. Housing; 2. Humidity control unit; 3. Heating unit; 4. Controller; 5. Solar radiation simulation light source; 6. Rotary motor; 7. Support frame; 8. Power equipment simulation box; 9. Heat source simulation heater; 10. First temperature sensor; 11. Second temperature sensor; 12. Data acquisition module. Detailed Implementation

[0026] The present invention will now be described through specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Variations and advantages that can be conceived by those skilled in the art without departing from the spirit and scope of the inventive concept are included in the present invention, and the scope of protection of the present invention is defined by the appended claims and any equivalents thereof.

[0027] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise specified, the raw materials and equipment used in this invention are conventional in the art and can be obtained through conventional commercial means; unless otherwise specified, the methods used in this invention are conventional methods in the art.

[0028] Example 1: Reference Figure 1 As shown, the present invention provides a testing device for the temperature control effect of a cooling coating on power equipment, comprising: The housing 1 has an internal test chamber, and the test chamber is equipped with a support 7 to hold the power equipment simulation box 8. Heat source simulation heater 9, whose heating end extends into the power equipment simulation box 8 to simulate the heating state of the power equipment heating element; The environmental simulation system includes a humidity control unit 2 for regulating the humidity inside the test chamber, a heating unit 3 for regulating the temperature inside the test chamber, and a solar radiation simulation light source 5 for regulating the light intensity inside the test chamber. Controller 4 is electrically connected to heat source simulation heater 9, heating unit 3 and solar radiation simulation light source 5; The temperature detection system includes a data acquisition module 12, a first temperature sensor 10 for detecting the temperature outside the power equipment simulation box 8, and a second temperature sensor 11 for detecting the temperature inside the power equipment simulation box 8. The data acquisition module 12 is electrically connected to the first temperature sensor 10 and the second temperature sensor 11 to synchronously acquire and record temperature data from both locations.

[0029] In this embodiment, the data acquisition module 12 and the controller 4 are located outside the test chamber. The data acquisition module 12 is a multi-channel temperature tester, and the controller 4 is a computer.

[0030] The power equipment simulation chamber 8 can be matched to the surface geometry of different power equipment as needed, overcoming the limitation of traditional material-level testing in failing to reproduce the structure of the equipment itself. The heat source simulation heater 9 of the testing device can extend into the simulation chamber, supporting adjustment of heat flux density or heating power to accurately simulate the heat source characteristics of the equipment. The environmental simulation system can control key factors such as ambient temperature and simulate solar radiation, more realistically reproducing the working environment of the coating under actual operating conditions. The temperature detection system can simultaneously collect internal and external temperatures and calculate the temperature rise value of the power equipment simulation chamber 8, thereby evaluating the temperature control effect of the cooling coating. By precisely controlling the heat source and environmental parameters and employing a high-precision temperature measurement unit, the above testing device can accurately quantify the temperature drop effect brought by the coating and ensure the stability and repeatability of the test results. The power equipment simulation chamber 8 can be part of the testing device or a separate testing component, facilitating its use in different testing devices.

[0031] The solar radiation simulation light source 5 is a xenon arc lamp or a metal halide lamp. It can effectively cover the main bands of the solar spectrum, especially in the visible and near-infrared regions, where it has a high spectral matching degree. It can realistically reproduce the effect of natural sunlight on the cooling coating, thereby more accurately evaluating the thermal regulation performance of the coating in actual outdoor applications.

[0032] In a preferred embodiment of the invention, the solar radiation simulation light source 5 is disposed inside the test chamber and directly above the power equipment simulation box 8. This arrangement ensures uniform illumination of the coating surface, improving the environmental simulation of the test.

[0033] Furthermore, the environmental simulation system also includes a rotary motor 6, beneath which a flat plate is mounted, and a solar radiation simulation light source 5 is fixedly mounted on this plate, so that the rotary motor 6 drives the solar radiation simulation light source 5 to rotate around the vertical central axis of the power equipment simulation box 8. For the power equipment simulation box 8 with its complex geometry, a fixed light source is prone to localized irradiation blind spots. The rotation of the solar radiation simulation light source 5 around its axis allows light to cover the surface of the simulation box from different directions, and the rotation speed can be adjusted to ensure that all areas of the coating receive uniform and comprehensive irradiation, avoiding test data deviations caused by localized lack of irradiation and improving the accuracy of the cooling coating evaluation.

[0034] like Figure 1 As shown, the humidity control unit 2 includes a humidity generator and an air duct. The humidity generator is located on the outside of the housing 1. One end of the air duct is connected to the outlet of the humidity generator, and the other end extends through the side wall of the housing 1 into the test chamber to introduce moisture into the test chamber. This installation method can prevent the humidity control unit 2 from overheating due to high temperature accumulation in the simulated environment of the test chamber, thus ensuring its stable operation.

[0035] like Figure 1 As shown, the first temperature sensor 10 is located on the outside of the power equipment simulation chamber 8 and is spaced apart from the outer surface of the power equipment simulation chamber 8. The second temperature sensor 11 is fixed at the center of the inside of the power equipment simulation chamber 8 and is spaced apart from the inner wall of the power equipment simulation chamber 8 and the heat source simulation heater 9. The spaced arrangement of the first temperature sensor 10 from the outer surface of the power equipment simulation chamber 8 avoids interference from heat conduction due to direct contact with the simulation chamber, thus ensuring that the collected temperature is the true ambient temperature of the power equipment simulation chamber 8 in the test chamber. The second temperature sensor 11 is spaced apart from both the inner wall of the chamber and the heat source simulation heater 9 to avoid interference from both. Moreover, its central position inside the power equipment simulation chamber 8 places it in a stable thermal field within the simulation chamber, better reflecting the internal temperature rise characteristics of the coating under complex thermal environments, and further improving the accuracy and reliability of the test data.

[0036] In a preferred embodiment of the present invention, the housing 1 is an openable structure, allowing the power equipment simulation box 8, the heat source simulation heater 9 connected to the power equipment simulation box 8, and the temperature detection system to be removed from the test chamber and placed in an outdoor natural environment for testing the temperature control effect of the cooling coating. To test the temperature control effect of the cooling coating in an actual service atmospheric environment, the power equipment simulation box 8, the heat source simulation heater 9, the first temperature sensor 10, the second temperature sensor 11, and the data acquisition module 12 can be placed in an actual outdoor atmospheric environment. This device has multiple testing functions.

[0037] Example 2: This invention provides a method for testing the temperature control effect of a cooling coating on power equipment, using the testing apparatus of Example 1. The specific process is as follows: The temperature control effect of a cooling coating on electrical equipment with internal heat sources was simulated in a hot summer environment of 40℃ and strong sunlight. Step 100: First, evenly apply the cooling coating to be tested onto the surface of the power equipment simulation box. Install the heat source simulation heater inside the power equipment simulation box. Install the first temperature sensor and the second temperature sensor on the outer side and the middle of the inside of the power equipment simulation box, respectively. Heat the internal temperature of the device to 40°C through the heating unit. Turn on the solar radiation simulation light source, the rotary motor and the humidity adjustment unit, and adjust them to the required irradiance and atmospheric humidity. Turn on the heat source simulation heater, and set the heating power to be constant at 30W. Turn on the multi-channel temperature tester to record and collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box in real time. After T2 stabilizes, subtract the test result of the first temperature sensor from the test result of the second temperature sensor to obtain the temperature rise value Ta after applying the cooling coating, i.e., Ta = T2 - T1. Step 200: Place the power equipment simulation box with the protective coating into the test device, conduct the test under the same test conditions, and record the external temperature T3 and the internal temperature T4 of the power equipment simulation box. After T4 stabilizes, calculate the temperature rise value Tb of the power equipment simulation box, that is, Tb=T4-T3. Step 300: Compare Ta and Tb to obtain the temperature control effect of the cooling coating. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect.

[0038] In step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T4 is determined to be stable.

[0039] The cooling coating simulation chamber in step 100 is the experimental group, and the protective coating simulation chamber in step 200 is the control group. The protective coating only has basic equipment protection functions and no active or passive cooling thermal management characteristics. Its corresponding internal and external temperature difference Tb can be used as the reference heat exchange difference of the equipment when there is no effective cooling measures. The temperature difference Ta of the experimental group is the actual difference after the cooling coating participates in heat exchange. The comparison between the two can effectively eliminate the interference of non-coating factors such as equipment structure and inherent environmental thermal field. The difference between the two is essentially the change of the cooling coating on the internal and external heat transfer of the equipment. Through the quantitative comparison of the internal and external temperature differences, the temperature control performance of the cooling coating under complex working conditions can be truly reflected, and its actual temperature control effect can be accurately and efficiently quantified.

[0040] Example 3: This invention provides a method for testing the temperature control effect of a cooling coating on power equipment, using the testing apparatus of Example 1. The specific process is as follows: The temperature control effect of a cooling coating on electrical equipment without internal heat sources was simulated in a hot summer environment of 40℃ and strong sunlight. Step 100: First, the cooling coating to be tested is evenly applied to the surface of the power equipment simulation box. The first temperature sensor and the second temperature sensor are respectively installed on the outer side and the middle of the inside of the power equipment simulation box. The internal temperature of the device is heated to 40°C by the heating unit. The solar radiation simulation light source, the rotary motor and the humidity adjustment unit are turned on and adjusted to the required irradiance and atmospheric humidity. The multi-channel temperature tester is turned on to record and collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box in real time. After T2 stabilizes, the temperature rise value Ta after the cooling coating is applied is obtained by subtracting the test result of the first temperature sensor from the test result of the second temperature sensor at this time. That is, Ta = T2 - T1. Step 200: Place the power equipment simulation box with the protective coating into the test device, conduct the test under the same test conditions, and record the external temperature T3 and the internal temperature T4 of the power equipment simulation box. After T4 stabilizes, calculate the temperature rise value Tb of the power equipment simulation box, that is, Tb=T4-T3. Step 300: Compare Ta and Tb to obtain the temperature control effect of the cooling coating. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect.

[0041] In step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T4 is determined to be stable.

[0042] Example 4: This invention provides a method for testing the temperature control effect of a cooling coating on power equipment, using the testing apparatus of Example 1. The specific process is as follows: The effect of a cooling coating on the temperature control of electrical equipment with internal heat sources under simulated atmospheric conditions during actual service. Step 100: First, place the bracket, power equipment simulation box, heat source simulation heater, first temperature sensor, second temperature sensor, and multi-channel temperature tester in an actual outdoor sun exposure environment. Apply the cooling coating to be tested evenly to the surface of the power equipment simulation box. Install the heat source simulation heater inside the power equipment simulation box. Install the first temperature sensor and the second temperature sensor on the outer side and the middle of the inside of the power equipment simulation box, respectively. Turn on the heat source simulation heater and set the heating power to be constant at 30W. Turn on the multi-channel temperature tester and record and collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box in real time. After T2 stabilizes, subtract the test result of the first temperature sensor from the test result of the second temperature sensor to obtain the temperature rise value Ta after applying the cooling coating, i.e., Ta = T2 - T1. Step 200: Conduct a test on the power equipment simulation box with the protective coating under the same test conditions, and record the external temperature T3 and the internal temperature T4 of the power equipment simulation box. After T4 stabilizes, calculate the temperature rise value Tb of the power equipment simulation box, that is, Tb=T4-T3. Step 300: Compare Ta and Tb to obtain the temperature control effect of the cooling coating. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect.

[0043] In step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T4 is determined to be stable.

[0044] Example 5: This invention provides a method for testing the temperature control effect of a cooling coating on power equipment, using the testing apparatus of Example 1. The specific process is as follows: The effect of a cooling coating on the temperature control of electrical equipment without internal heat sources under simulated atmospheric conditions during actual service. Step 100: First, place the bracket, power equipment simulation box, first temperature sensor, second temperature sensor, and multi-channel temperature tester in an actual outdoor sun exposure environment. Apply the cooling coating to be tested evenly to the surface of the power equipment simulation box. Install the first temperature sensor and the second temperature sensor on the outer side and the middle of the inside of the power equipment simulation box, respectively. Turn on the multi-channel temperature tester and record and collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box in real time. After T2 stabilizes, subtract the test result of the first temperature sensor from the test result of the second temperature sensor to obtain the temperature rise value Ta after applying the cooling coating, i.e., Ta = T2 - T1. Step 200: Conduct a test on the power equipment simulation box with the protective coating under the same test conditions, and record the external temperature T3 and the internal temperature T4 of the power equipment simulation box. After T4 stabilizes, calculate the temperature rise value Tb of the power equipment simulation box, that is, Tb=T4-T3. Step 300: Compare Ta and Tb to obtain the temperature control effect of the cooling coating. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect.

[0045] In step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤±0.3℃ for 5-10 minutes, T4 is determined to be stable.

[0046] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A testing device for the temperature control effect of a cooling coating on power equipment, characterized in that, include: The housing (1) has a test chamber inside for placing the power equipment simulation box (8); The heat source simulates the heater (9), whose heating end extends into the power equipment simulation box (8) to simulate the heating state of the power equipment heating element; The environmental simulation system includes a humidity control unit (2) for adjusting the humidity inside the test chamber, a heating unit (3) for adjusting the temperature inside the test chamber, and a solar radiation simulation light source (5) for adjusting the light intensity inside the test chamber. The temperature detection system includes a data acquisition module (12), a first temperature sensor (10) for detecting the temperature outside the power equipment simulation box (8), and a second temperature sensor (11) for detecting the temperature inside the power equipment simulation box (8). The data acquisition module (12) is electrically connected to the first temperature sensor (10) and the second temperature sensor (11) to synchronously acquire and record temperature data from both locations.

2. The testing device for the temperature control effect of cooling coatings on power equipment according to claim 1, characterized in that, The solar radiation simulation light source (5) is a xenon arc lamp or a metal halide lamp.

3. The testing device for the temperature control effect of cooling coatings on power equipment according to claim 1, characterized in that, The solar radiation simulation light source (5) is located inside the test chamber and directly above the power equipment simulation box (8).

4. The testing device for the temperature control effect of cooling coatings on power equipment according to claim 3, characterized in that, The environmental simulation system also includes a rotary motor (6) that is connected to the solar radiation simulation light source (5) to drive the solar radiation simulation light source (5) to rotate around the vertical central axis of the power equipment simulation box (8).

5. The testing device for the temperature control effect of cooling coatings on power equipment according to claim 1, characterized in that, The humidity control unit (2) includes a humidity generator and an air duct. The humidity generator is located on the outside of the housing (1). One end of the air duct is connected to the air outlet of the humidity generator, and the other end extends through the side wall of the housing (1) into the test chamber to introduce moisture into the test chamber.

6. The testing device for the temperature control effect of cooling coatings on power equipment according to claim 1, characterized in that, The first temperature sensor (10) is located outside the power equipment simulation box (8) and is spaced apart from the outer surface of the power equipment simulation box (8). The second temperature sensor (11) is fixed at the center of the inside of the power equipment simulation box (8) and is spaced apart from the inner wall of the power equipment simulation box (8) and the heat source simulation heater (9).

7. The testing device for the temperature control effect of cooling coatings on power equipment according to any one of claims 1 to 6, characterized in that, The housing (1) is an openable structure, so that the power equipment simulation box (8), the heat source simulation heater (9) connected to the power equipment simulation box (8) and the temperature detection system can be taken out of the test chamber and placed in the outdoor natural environment for the temperature control effect test of the cooling coating.

8. A method for testing the temperature control effect of a cooling coating for power equipment, characterized in that, Includes the following steps: Step 100: Place the power equipment simulation box coated with the cooling coating into the test device, collect the external temperature T1 and the internal temperature T2 of the power equipment simulation box, and record the temperature rise value Ta after T2 stabilizes, where Ta = T2 - T1; Step 200: Place the power equipment simulation box with the protective coating into the test device, collect the external temperature T3 and the internal temperature T4 of the power equipment simulation box, and record the temperature rise value Tb after T4 stabilizes, where Tb = T4 - T3; Step 300: Compare Ta and Tb. If Ta < Tb, it indicates that the cooling coating has a temperature control effect. If Ta ≥ Tb, it indicates that the cooling coating has no obvious temperature control effect. The execution order of steps 100 and 200 can be interchanged or performed simultaneously; the testing device in steps 100 and 200 is the testing device described in claims 1 to 7 and the environmental parameters during testing are the same.

9. The test method for the temperature control effect of the cooling coating for power equipment according to claim 8, characterized in that, In step 100, when the internal temperature T2 of the power equipment simulation box fluctuates within ≤ ±0.3℃ for 5-10 minutes, T2 is determined to be stable; in step 200, when the internal temperature T4 of the power equipment simulation box fluctuates within ≤ ±0.3℃ for 5-10 minutes, T4 is determined to be stable.

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