System and method for detecting reflective insulation performance of coating
The coating reflective heat insulation performance testing system, which uses a light source simulation component and a temperature detector, solves the problem of inaccurate coating testing in existing technologies, achieves efficient and accurate evaluation of coating reflective heat insulation performance, and provides a basis for coating material development.
Patent Information
- Application Number
- CN202510910566.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-11-18
AI Technical Summary
Existing coating testing methods are greatly affected by weather, making it difficult to accurately distinguish between reflective heat insulation effects and the building's own heat insulation performance. Furthermore, the testing time is long, leading to inaccurate results.
A coating reflective heat insulation performance testing system employing a light source simulation component, temperature detector, and control module evaluates the coating's reflective heat insulation performance by illuminating a target wall with a simulated light source and measuring the temperatures of the coating's bottom surface, surface, and the inner and outer surfaces of the substrate using temperature detectors.
It improves the efficiency and accuracy of testing the reflective heat insulation performance of coatings, enabling the differentiation of the reflective heat insulation effect of coatings without knowing the thermal conductivity of the substrate, and provides an operational indicator for the development of coating materials.
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Figure CN120971490A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of coating detection, and in particular to a coating reflective thermal insulation performance detection system and method. BACKGROUND
[0002] By measuring the difference between outdoor temperature and the temperature of the closed space of a building (thermal insulation temperature difference) as an index, the thermal insulation effect of the coating can be more intuitively represented. However, this method obtains a general comprehensive performance, which is subject to the material and structural characteristics of the building itself, and it is difficult to distinguish whether the indoor and outdoor temperature difference is due to the reflective thermal insulation effect of the reflective thermal insulation coating or the thermal insulation performance of the building itself.
[0003] Most of the coating detection methods used in the related art are affected by the weather, and the detection time is relatively long, resulting in less accurate reflective thermal insulation performance of the coating. SUMMARY
[0004] The main purpose of the embodiments of the present application is to provide a coating reflective thermal insulation performance detection system and method to improve the detection efficiency and accuracy of the reflective thermal insulation performance of the coating.
[0005] To achieve the above purpose, one aspect of an embodiment of the present application provides a coating reflective thermal insulation performance detection system, which comprises a light source simulation assembly, a first temperature detector, a second temperature detector, a third temperature detector, an indoor and outdoor temperature detection assembly, and a control module. The light source simulation assembly is used to adjust the simulation light source and control the simulation light source to irradiate the target irradiation wall. The side of the target irradiation wall faces the outdoor environment and coincides with the light irradiation surface of the light source simulation assembly. The side of the target irradiation wall is coated with a coating to be measured. The other side of the target irradiation wall faces the indoor environment. The first temperature detector is arranged on one side of the target irradiation wall. The first temperature detector is used to detect the coating bottom surface temperature of the coating to be measured and the outer surface temperature when the target irradiation wall has no coating to be measured. The second temperature detector is arranged on the other side of the target irradiation wall. The second temperature detector is used to detect the inner surface temperature of the target irradiation wall. The third temperature detector is used to detect the coating surface temperature of the coating to be measured. The indoor and outdoor temperature detection assembly is used to detect the indoor temperature and the outdoor temperature. The control module is used to evaluate and determine the reflective thermal insulation performance of the coating to be measured according to the corresponding outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature under each coating state of the target irradiation wall.
[0006] Furthermore, the system also includes a temperature monitoring component; the temperature monitoring component is used to calibrate the first temperature detector, the second temperature detector, the third temperature detector, and the indoor / outdoor temperature detection component.
[0007] Furthermore, the target irradiation wall is provided with mounting slots inside, which are used to fix the first temperature detector when the target irradiation wall has a coating to be tested.
[0008] To achieve the above objectives, another aspect of this application proposes a method for testing the reflective heat insulation performance of a coating, the method comprising: Based on the set irradiation requirements, a simulated indoor environment is constructed, a target irradiation wall is selected from the indoor environment, and the light source simulation component is activated. The simulated light source is adjusted and controlled to irradiate the target irradiation wall. The target irradiation wall is painted in two states: coated and uncoated. When in the uncoated state, the outer surface temperature of the target irradiated wall detected by the first temperature detector, the inner surface temperature of the target irradiated wall detected by the second temperature detector, and the indoor and outdoor temperatures detected by the indoor and outdoor temperature detection components are obtained. Turn off the light source simulation component, apply the coating to be tested to the side of the target wall that is illuminated by light to form the coating to be tested, cover the first temperature detector, and set a third temperature detector on the outer surface of the coating to be tested. When the coating is in place, the light source simulation component is activated to obtain the coating bottom temperature detected by the first temperature detector and the coating surface temperature detected by the third temperature detector, and the inner surface temperature, indoor temperature and outdoor temperature are obtained again. With the target irradiation wall in various coating states, the reflective heat insulation performance of the coating under test is evaluated and determined based on the outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature.
[0009] Furthermore, the evaluation to determine the reflective heat insulation performance of the coating under test includes: Based on the outer surface temperature in the uncoated state and the inner surface temperature and the temperature of the bottom surface of the coating when the coating is in the coated state. and the inner surface temperature The formula for calculating reflective heat insulation efficiency.
[0010] Determine the reflective heat insulation efficiency of the coating under test. .
[0011] Furthermore, the evaluation to determine the reflective heat insulation performance of the coating under test includes: Based on the outer surface temperature in the uncoated state and the surface temperature of the coating in the coated state Determine the surface cooling coefficient of the coating. , = ; According to the temperature of the bottom surface of the coating when it is in the coated state and the surface temperature of the coating Determine the thermal insulation coefficient of the coating. , = ; Wherein, the surface cooling coefficient of the coating The thermal insulation coefficient of the coating is used to characterize the reflected light source thermal properties of the coating material under test. Characterizes the thermal insulation performance of the coating to be tested in the coating to be tested.
[0012] Furthermore, the evaluation to determine the reflective heat insulation performance of the coating under test includes: A first temperature difference in the uncoated state is determined based on the indoor temperature and the outdoor temperature in the uncoated state. A second temperature difference in the coated state is determined based on the indoor temperature and the outdoor temperature in the coated state. The overall thermal insulation performance of the coating on the building is evaluated based on the difference between the first temperature difference and the second temperature difference.
[0013] Furthermore, the method also includes: The test coating is repeatedly applied to the side of the target wall that is exposed to light, and the current thickness of the test coating is measured each time it is applied. Based on the current thickness, the reflective heat insulation efficiency corresponding to the current thickness is repeatedly calculated; The coating thickness is obtained by performing a linear fit between the current thickness and the reflective heat insulation efficiency. With reflective heat insulation efficiency linear function The intrinsic properties of the coating under test are evaluated using the linear function.
[0014] Furthermore, the method also includes: An installation slot is made on the side of the target irradiation wall that is exposed to light, and the first temperature detector is embedded in the installation slot. When the paint to be tested is applied to the side of the target irradiation wall exposed to light, the embedded first temperature detector is covered.
[0015] Furthermore, the method also includes: Determine whether the temperature changes of the outer surface temperature, the inner surface temperature, the indoor temperature, and the outdoor temperature are all greater than the set temperature stability threshold. If so, then the currently recorded outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature will be removed.
[0016] The embodiments of this application include at least the following beneficial effects: This application provides a system and method for testing the reflective heat insulation performance of a coating. This method uses a light source simulation component to quantitatively control the light source, thereby irradiating a target wall or the coating to be tested on the target wall, reducing uncontrollable natural interference factors. By detecting the inner and outer surface temperatures of the substrate and the indoor and outdoor temperatures before and after coating, the reflective heat insulation performance of the coating is evaluated and determined, making measurement more convenient. It allows for the measurement and evaluation of the comprehensive reflective heat insulation performance of the coating without needing to know the thermal conductivity of the substrate, improving detection efficiency and accuracy. Existing testing methods do not distinguish between the coating's ability to reflect light and its own heat insulation capacity, nor can they identify whether the coating's heat insulation and cooling effect comes from the cooling caused by the coating's reflection of light or from the coating's own good heat insulation performance. The solution of this application can obtain the coating surface cooling coefficient and coating heat insulation coefficient through temperature data, accurately distinguishing the reflective cooling effect and the heat insulation cooling effect of a coating of a certain thickness. Furthermore, by varying the coating thickness and sequentially measuring the reflective heat insulation performance corresponding to different thicknesses, and then employing a fitting method, the intrinsic properties of the coating under test can be obtained. This avoids the influence of coating thickness on the measurement results and yields more fundamental parameters of the coating. It is beneficial for identifying the roles of various functional pigments / fillers and additives in the coating, providing an operable calculation basis and quantitative indicators for the development and design of coating materials. This application's solution is simple, convenient, low-cost, highly efficient, and widely applicable. It can be used not only for ordinary building material coatings but also for other new material systems with heat insulation and thermal insulation functions. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the coating reflective heat insulation performance testing system provided in an embodiment of this application in the uncoated state; Figure 2 This is a schematic diagram of the structure of a coating reflective heat insulation performance testing system provided in an embodiment of this application when the coating is in a coated state; Figure 3 This is a flowchart of a method for testing the reflective heat insulation performance of a coating according to an embodiment of this application; Figure 4 This is a linear function graph showing the overall reflective heat insulation efficiency measured for different coating thicknesses according to an embodiment of this application.
[0018] Figure description: First temperature detector 100, second temperature detector 200, third temperature detector 300. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.
[0020] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”
[0021] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0023] Reference Figure 1 and Figure 2 In some embodiments of this invention, the coating's reflective heat insulation performance testing system includes: a control module, a light source simulation component, a first temperature detector 100, a second temperature detector 200, a third temperature detector 300, and an indoor / outdoor temperature detection component.
[0024] The light source simulation component can adjust the lighting parameters to regulate the simulated light source, which then illuminates the target wall.
[0025] The lighting parameters include: the distance from the simulated light source to the target illumination wall, the light source angle, and the light intensity. The light intensity can range from 1,000 lux to 150,000 lux. The simulated light source can be one or more of the following: xenon lamp, fluorescent lamp, LED lamp, or infrared lamp.
[0026] The target illumination wall is one of the walls selected in the constructed indoor environment, which is a closed space to simulate the application scenario.
[0027] One side of the target illumination wall faces outdoors, serving as the illuminated surface and receiving illumination from the simulated light source; that is, the illuminated surface of the simulated light source coincides with one side of the target illumination wall. The target illumination wall is coated with the coating to be tested, in order to obtain temperature data with the coating in place. The other side of the target illumination wall faces the indoor environment.
[0028] A first temperature detector 100 is installed on one side of the target irradiation wall, that is, on the outer surface of the target irradiation wall. When the target irradiation wall has no coating to be tested, the first temperature detector 100 detects the temperature of the outer surface of the target irradiation wall. When the target irradiation wall has a coating to be tested, the first temperature detector 100 detects the temperature of the bottom surface of the coating to be tested, that is, the outer surface temperature of the target irradiation wall with the coating to be tested.
[0029] In other words, when there is a coating to be tested on the target irradiation wall, the first temperature detector 100 is installed on the side of the coating to be tested that is exposed to light, but below the coating to be tested.
[0030] On the other side of the target irradiation wall, i.e. the inner wall of the target irradiation wall, a second temperature detector 200 is installed. The second temperature detector 200 detects the inner surface temperature of the target irradiation wall, i.e. whether there is a coating to be tested on one side of the target irradiation wall, the temperature is detected as the inner surface temperature.
[0031] When the target irradiation wall has a coating to be tested, the third temperature detector 300 is installed on the other side of the light-receiving surface of the coating to be tested. The third temperature detector 300 can detect the surface temperature of the coating to be tested.
[0032] The indoor and outdoor temperature detection component can detect the indoor temperature inside the constructed indoor environment and the outdoor temperature outside the indoor environment to measure the air temperature inside the enclosed space and the external temperature of the enclosed space away from the simulated light source.
[0033] In one embodiment, the indoor and outdoor temperature detection component includes an indoor temperature detector and an outdoor temperature detector.
[0034] An indoor temperature detector is suspended in the indoor environment. It can measure the air environment inside a closed space and obtain the indoor temperature.
[0035] An outdoor temperature detector is placed outside the enclosed space, away from the simulated light source, to measure the outside air temperature and obtain the outdoor temperature.
[0036] The control module is connected to the light source simulation component. The control module can send command signals to the light source simulation component according to the set illumination requirements, thereby adjusting the illumination parameters of the simulated light source in the light source simulation component.
[0037] The control module can evaluate the reflective heat insulation performance of the coating under test based on the outer surface temperature, coating bottom surface temperature, inner surface temperature, indoor temperature, and outdoor temperature of the target irradiation wall when it is uncoated, and the coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature of the target irradiation wall when it is coated, in order to determine the reflective heat insulation performance of the coating under test.
[0038] The coating status of the target illumination wall includes: coated state and uncoated state.
[0039] In other words, the control module evaluates the reflective heat insulation performance of the coating under test by measuring the outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature under various coating states of the target irradiated wall, so as to determine the reflective heat insulation performance of the coating under test.
[0040] Reference Figure 1 and Figure 2 In some embodiments of this invention, the reflective heat insulation performance testing system further includes a temperature monitoring component.
[0041] The temperature monitoring component is connected to the control module. The temperature monitoring component can calibrate the temperature of all temperature detectors to obtain temperature data after the temperature has stabilized.
[0042] In some embodiments of this invention, the indoor and outdoor temperature detection component includes an indoor temperature detector and an outdoor temperature detector.
[0043] An indoor temperature detector is suspended in the indoor environment. It can measure the air environment inside a closed space and obtain the indoor temperature.
[0044] An outdoor temperature detector is placed outside the enclosed space, away from the simulated light source, to measure the outside air temperature and obtain the outdoor temperature.
[0045] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the interior of the target irradiation wall is provided with mounting slots. The mounting slots can fix the first temperature detector 100 when the target irradiation wall is coated with the coating to be tested, so that the data acquisition surface of the first temperature detector 100 can face the bottom surface of the coating to be tested, thereby detecting the temperature of the bottom surface of the coating.
[0046] In this case, one side of the light-receiving surface of the target irradiation wall can be fitted with mounting holes or grooves to embed the first temperature detector 100, so that the coating formed by the coating to be tested can cover the first temperature detector 100.
[0047] In another embodiment of the invention, Figure 3 This is an optional flowchart of the method for testing the reflective heat insulation performance of a coating provided in this application embodiment. The method for testing the reflective heat insulation performance of a coating can be applied to the aforementioned coating reflective heat insulation performance testing system. Figure 3 The method may include, but is not limited to, steps S100 to S500.
[0048] Step S100: Based on the set illumination requirements, build a simulated indoor environment, select a target illumination wall from the indoor environment, start the light source simulation component, adjust the simulated light source, and control the simulated light source to illuminate the target illumination wall. Step S200: When in an uncoated state, acquire the outer surface temperature of the target irradiation wall detected by the first temperature detector, the inner surface temperature of the target irradiation wall detected by the second temperature detector, and the indoor and outdoor temperatures detected by the indoor and outdoor temperature detection components. Step S300: Turn off the light source simulation component, apply the coating to be tested to the side of the target wall that is illuminated by light to form the coating to be tested, cover the first temperature detector, and set the third temperature detector on the outer surface of the coating to be tested. Step S400: When there is a coating, start the light source simulation component, obtain the coating bottom surface temperature detected by the first temperature detector and the coating surface temperature detected by the third temperature detector, and obtain the inner surface temperature, indoor temperature and outdoor temperature again. Step S500: With the target irradiation wall in each coating state, evaluate and determine the reflective heat insulation performance of the coating to be tested based on the outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature.
[0049] Steps S100 to S500 of this application embodiment involve constructing a simulated indoor environment based on the set irradiation requirements, adjusting the simulated light source, and outputting a quantitative and controllable light source to avoid interference from natural factors and improve detection reliability. Evaluation is performed by detecting the inner and outer surface temperatures of the substrate before and after coating, as well as the indoor and outdoor temperatures, making measurement more convenient. The comprehensive reflective heat insulation performance of the coating can be measured and evaluated without knowing the thermal conductivity of the substrate. Compared with existing technologies where reflective heat insulation coatings are applied to the substrate for testing, and the results obtained are the performance of the entire component, this solution can distinguish and evaluate the reflective heat insulation effect of the coating itself, improving detection efficiency and accuracy.
[0050] In some embodiments of S100, the simulated sunlight light source components are adjusted according to the set illumination requirements. A sealed space is constructed using building materials to form an indoor environment to simulate the application scenario. One of the walls in the indoor environment is selected as the target illumination wall, and the simulated light source illuminates the target illumination wall according to the adjusted illumination parameters.
[0051] The coating status of the target illumination wall includes: coated state and uncoated state.
[0052] In some embodiments of S200, when the target irradiation wall is in an uncoated state, a first temperature detector is attached to the outer surface of the target irradiation wall to detect the temperature of the outer surface of the target irradiation wall.
[0053] A second temperature detector is attached to the inner wall of the target irradiation wall to detect the inner surface temperature of the target irradiation wall.
[0054] An indoor temperature detector is installed in the indoor and outdoor temperature detection components inside the density space to detect the air temperature inside the indoor environment, i.e., the indoor temperature.
[0055] An outdoor temperature detector from an indoor / outdoor temperature detection assembly is installed outside the enclosed space, away from the simulated light source, to measure the outside air temperature, i.e., the outdoor temperature.
[0056] In one embodiment, before acquiring the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature, the temperature monitoring component needs to be activated to calibrate the temperatures of all temperature detectors. If the temperature changes are all less than or equal to a set temperature stability threshold, the temperature is considered stable, and the current data is recorded to obtain the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature. If the temperature changes are all greater than the set temperature stability threshold, temperature fluctuations are considered to exist, the current temperature is discarded, and the detection and judgment are repeated.
[0057] In some embodiments of S300, the light source simulation component is turned off, and the position of the first temperature detector can be adjusted by means of bonding, drilling or grooving on the light-receiving surface of the target illumination wall, i.e., one side of the target illumination wall.
[0058] The coating to be tested is applied to the light-receiving surface of the target irradiation wall, i.e., one side of the target irradiation wall, to form the coating to be tested. The first temperature detector is then covered to measure the temperature of the bottom surface of the coating. After the coating dries, a third temperature detector is attached to the outer surface of the coating to be tested, i.e., the light-receiving surface, to measure the surface temperature of the coating.
[0059] In other words, the light source simulation component is turned off, the position of the first temperature detector is adjusted, and the coating to be tested is applied to one side of the target irradiation wall so that the target irradiation wall is in a coated state. The first temperature detector detects one side of the coating to be tested, and the third temperature detector detects the other side of the coating to be tested, thereby obtaining the bottom temperature and surface temperature of the coating.
[0060] In some embodiments of S400, the current target irradiation wall is coated with a coating through the operation of S300.
[0061] With the coating in place, the light source simulation component is activated, and the target illumination wall is irradiated again using the illumination parameters in S100 to obtain the coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature.
[0062] Understandably, if the temperature changes mentioned above are all less than or equal to the set temperature stability threshold, the temperature is considered stable, and the current data is recorded to obtain the coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature. If the temperature changes mentioned above are all greater than the set temperature stability threshold, temperature fluctuations are considered to exist, the current temperature is discarded, and the test is repeated.
[0063] In some embodiments of S500, the reflective heat insulation performance of the coating to be tested is determined by evaluating the outer surface temperature, coating bottom surface temperature, inner surface temperature, indoor temperature, and outdoor temperature of the target irradiation wall in the uncoated state, and the coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature of the target irradiation wall in the coated state.
[0064] In other words, the control module evaluates the reflective heat insulation performance of the coating under test by measuring the outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature under various coating states of the target irradiated wall, so as to determine the reflective heat insulation performance of the coating under test.
[0065] In another embodiment of the present invention, in S500, the evaluation process of reflective heat insulation performance specifically includes: S510, based on the outer surface temperature in the uncoated state and inner surface temperature And the temperature of the coating bottom surface when the coating is in the coated state. and inner surface temperature The formula for calculating reflective heat insulation efficiency.
[0066] Determine the reflective heat insulation efficiency .
[0067] S520, based on the outer surface temperature in the uncoated state and the surface temperature of the coating when it is in the coated state Determine the surface cooling coefficient of the coating. , = ; S530, based on the temperature of the coating bottom surface when in a coated state. and coating surface temperature Determine the thermal insulation coefficient of the coating. , = Among them, the surface cooling coefficient of the coating Characterizing the thermal properties of the coating material reflecting the light source, the coating's thermal insulation coefficient. Characterizes the thermal insulation performance of the coating to be tested in the coating to be tested.
[0068] S540, determine the first temperature difference in the uncoated state based on the indoor temperature and outdoor temperature in the uncoated state; S541, determine the second temperature difference in the coated state based on the indoor temperature and outdoor temperature in the coated state; S542, the building insulation coefficient of the coating is determined based on the difference between the first temperature difference and the second temperature difference; wherein, the building insulation coefficient of the coating characterizes the comprehensive thermal insulation performance of the coating to be tested in the building.
[0069] In some embodiments of S510, reflective heat insulation efficiency is used. The formula for calculating the reflective heat insulation efficiency, which serves as a comprehensive performance indicator of the coating under test, is as follows:
[0070] in, The heat flux density of the target wall under simulated light source illumination in its uncoated state; The heat flux density of the target irradiated wall under simulated light source illumination when it is coated. The outer surface temperature of the target wall under simulated light source illumination in its uncoated state. The inner surface temperature of the target wall under simulated light source illumination in its uncoated state. This refers to the outer surface temperature of the target wall under simulated light source illumination when the coating is in its coated state, i.e., the temperature of the bottom surface of the coating. The inner surface temperature of the target wall under simulated light source illumination when it is in the coated state.
[0071] Specifically, heat flux density The calculation formula is:
[0072] Where λ is the thermal conductivity. For temperature, For thickness, For temperature gradient.
[0073] For a target wall of building materials, without the coating to be tested, when the simulated light source is turned on, the outer surface temperature of the target wall is... The inner surface temperature of the target irradiation wall A temperature difference Δ will be generated Temperature gradient The corresponding heat flux density .
[0074] When the target wall surface has a coating to be tested, when the simulated light source is turned on, the light source illuminates the surface of the coating to be tested, and its temperature is... The temperature at the interface between the underside of the coating and the surface of the target irradiated wall is... The inner surface temperature of the target irradiation wall is Temperature differences will still occur. The corresponding temperature gradient heat flux density .
[0075] Heat density through the target-irradiated wall under illumination without coating Significantly larger than when coated The reduction in heat density is due to the coating's ability to reflect light and heat, as well as its function of blocking heat transfer.
[0076] The coating serves the dual purpose of blocking heat radiation and heat conduction, thereby reducing the heat flux density on the surface of the retaining wall substrate. , .
[0077] Define the reflective heat insulation efficiency of the coating As a comprehensive indicator of reflective thermal insulation performance, the formula for calculating reflective thermal insulation efficiency is as follows:
[0078] With the target illumination wall fixed, the thickness and thermal conductivity If it is a constant, then
[0079] To achieve the desired effect on a target irradiation wall, it is only necessary to measure the temperature difference between the outer and inner surfaces of the target irradiation wall under both coated and uncoated conditions in order to calculate the coating's reflective heat insulation efficiency. In the case of a coated surface, the outer surface of the target irradiation wall is also the bottom surface of the coating to be tested. Therefore, the first temperature detector needs to be placed at the interface between the outer surface of the substrate and the bottom surface of the coating.
[0080] In some embodiments of S520, the coating surface cooling coefficient Characterizing the thermal properties of the coating itself that reflect light sources. = .
[0081] in, The outer surface temperature of the target wall under simulated light source illumination in its uncoated state. The coating surface temperature is the temperature of the coating in the coated state. The larger the value, the better the heat reflection effect of the coating itself.
[0082] In some embodiments of S530, the coating thermal insulation coefficient To characterize the thermal insulation performance of the coating being tested in the test coating, = .
[0083] in, This refers to the temperature of the bottom surface of the coating when it is in a coated state. The coating surface temperature is the temperature of the coating in the coated state. The larger the value, the better the thermal insulation performance of the tested coating.
[0084] In some embodiments of S540, the difference between the indoor temperature inside the enclosed space and the outdoor temperature represents the heating effect of the gas, which can be used to visually evaluate the overall heat insulation and cooling effect of a building coated with reflective heat insulation material.
[0085] The calculated indoor temperature is obtained in the uncoated state. and outdoor temperature The first temperature difference ΔT(40-50).
[0086] In some embodiments of S540, the indoor temperature is calculated when the coating is in place. and outdoor temperature The second temperature difference ΔT(41-51).
[0087] In some embodiments of S550, by comparing a first temperature and a second temperature, the overall thermal insulation performance of the coating to be tested when applied to a building can be quickly determined.
[0088] The greater the difference between the first temperature and the second temperature, the better the overall thermal insulation performance of the coating applied to the building.
[0089] Existing testing methods do not differentiate between the coating's ability to reflect light and its inherent heat insulation capacity. Therefore, they cannot determine whether the coating's cooling effect stems from light reflection or from the coating's inherent heat insulation properties. The measurement device and calculation method provided in the above solution can yield the coating surface cooling coefficient. and coating thermal insulation coefficient It can accurately distinguish between the reflective cooling effect and the heat insulation cooling effect of a coating of a certain thickness.
[0090] In another embodiment of the present invention, the method for detecting reflective heat insulation performance further includes: S600: Repeatedly apply the test coating to the side of the target wall that is illuminated, and detect the current thickness of the test coating each time it is applied. S610, Based on the current thickness, repeatedly calculate the reflective heat insulation efficiency corresponding to the current thickness; S620, by performing a linear fit between the current thickness and the reflective heat insulation efficiency, the coating thickness is obtained. With reflective heat insulation efficiency linear function The intrinsic properties of the coating under test are evaluated using a linear function.
[0091] In this embodiment, different thicknesses of coating are applied to one side of the target irradiation wall, i.e., the light-receiving surface. For each coating, calculate the reflective heat insulation efficiency corresponding to the current thickness. .use For thickness Plot the graph and then fit it to a linear function.
[0092] Among them, intercept Corresponding coating thickness Reflective heat insulation efficiency approaching 0 This means that the heat insulation effect is completely disregarded by the coating thickness. This represents the intrinsic reflectivity of the coating to a light source without considering thermal conduction. (Fitted slope coefficient) This indicates the reflective heat insulation efficiency of the coating under test. The situation changes with thickness. This serves as an indicator of the coating's intrinsic thermal insulation capability without considering reflection.
[0093] intercept The larger the value, the stronger the light reflection capability of the light source, and the greater the intercept. The slope coefficient is directly proportional to the light reflectance of the coating being tested. The smaller the value, the worse the coating's insulation effect on the heat generated by the light source. (Fitted slope coefficient) It is directly proportional to the thermal insulation performance of the coating being tested.
[0094] One of the methods is to use a thickness gauge to detect the current thickness of the coating being tested each time it is applied.
[0095] By employing the above method, and by varying the coating thickness and measuring the corresponding reflective heat insulation efficiency at different thicknesses, the intrinsic reflective performance parameters of the reflective heat insulation coating can be obtained through a fitting method. Intrinsic thermal insulation performance parameters This avoids the influence of coating thickness on the measurement results, allowing for the acquisition of more fundamental parameters of the coating. It facilitates the identification of the roles of various functional pigments / fillers and additives in the coating, providing operable calculation bases and quantitative indicators for the development and design of coating materials.
[0096] In another embodiment of the present invention, the method for detecting reflective heat insulation performance further includes: S310, an installation slot is opened on the side of the target irradiation wall that is exposed to light, and the first temperature detector is embedded in the installation slot. When the paint to be tested is applied to the side of the target irradiation wall that is exposed to light, the embedded first temperature detector is covered.
[0097] In this embodiment, after the light source simulation component is turned off, mounting holes and slots can be opened on the side of the target irradiation wall that is illuminated by light through methods such as bonding, drilling, or grooving. The first temperature detector is embedded in the mounting holes and slots so that the data acquisition surface of the first temperature detector faces the bottom surface of the coating to be tested, thereby detecting the temperature of the bottom surface of the coating.
[0098] In other words, by means of bonding, drilling or grooving, mounting holes and slots are made on the side of the target irradiation wall that is exposed to light. The mounting holes and slots are used to fix the first temperature detector. The temperature measuring head of the first temperature detector is flush with the outer surface of the target irradiation wall in order to adjust the position of the first temperature detector.
[0099] When the paint to be tested is applied to one side of the target irradiation wall, the first temperature detector is covered.
[0100] In another embodiment of the present invention, the method for detecting reflective heat insulation performance further includes: S700 determines whether the temperature changes of the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature are all greater than the set temperature stability threshold. S710, if not, disable the light source simulation component.
[0101] In this embodiment, before acquiring the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature, the temperature monitoring component needs to be activated to calibrate the temperatures of all temperature detectors. If the changes in these temperatures are all less than or equal to a set temperature stability threshold, the temperatures are considered stable, and the current data is recorded to obtain the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature. If the changes in these temperatures are all greater than the set temperature stability threshold, temperature fluctuations are considered to exist, the current temperatures are discarded, and the detection and judgment are repeated.
[0102] In other words, after the light source simulation component is activated, the temperature change value of the target irradiated wall without the coating to be tested is less than or equal to the set temperature stabilization threshold. It is considered that the temperature balance has been reached. The data of all temperature probes after the temperature stabilizes after being irradiated by the light source are recorded, and S400 is executed. If the temperature changes mentioned above are all greater than the set temperature stability threshold, then temperature fluctuations are considered to exist. The current temperature is then removed, and the test is repeated.
[0103] The set temperature stability threshold can be 0.1℃ or 0.2℃. The specific value can be set according to actual needs, and this application does not impose any restrictions.
[0104] Understandably, when a coating is being tested, if the changes in the coating's bottom surface temperature, surface temperature, inner surface temperature, indoor temperature, and outdoor temperature are all less than or equal to the set temperature stability threshold, then the temperature is considered stable, and the current data is recorded to obtain the coating's bottom surface temperature, surface temperature, inner surface temperature, indoor temperature, and outdoor temperature. If the changes in the above temperatures are all greater than the set temperature stability threshold, then temperature fluctuations are considered to exist, the current temperature is discarded, and the test is repeated.
[0105] The following section provides a detailed introduction and explanation of the solutions in this invention, using specific scenarios and application examples to test the reflective heat insulation performance of the coating: For example, according to the set irradiation requirements, a rectangular closed indoor environment (length, width and height are 40cm*40cm*40cm) is built using OSB board with a thickness of 2cm as the building material barrier wall. As a test simulation scenario, one of the barriers wall (40cm*40cm) of the closed indoor environment is set as the target irradiation wall. Activate the light source simulation component, adjust the simulated light source to a fluorescent lamp, position the target illumination wall directly in front of the simulated light source, adjust the distance between the light source and the target illumination wall to 20cm, and irradiate vertically at a 90-degree angle, so that the light intensity is approximately 50,000 lux; Specifically, a first temperature detector is attached to the outer surface of the target irradiation wall to detect its outer surface temperature; a second temperature detector is attached to the inner wall of the target irradiation wall to detect its inner surface temperature; an indoor temperature detector is suspended inside the sealed indoor environment to detect the indoor air temperature within the sealed space; an outdoor temperature detector is installed outside the sealed indoor environment, away from the light source, to detect the outdoor air temperature; and a temperature monitoring device is activated to calibrate the temperatures of all temperature probes.
[0106] With the target irradiation wall in an uncoated state, after being irradiated by a simulated light source, the temperatures of all temperature probes were measured. After 30 minutes, once the temperature was confirmed to be stable, the outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature of the target irradiation wall were obtained. Turn off the light source simulation component, drill an L-shaped test hole through the target irradiation wall, and embed the first temperature detector so that the temperature measuring head of the temperature measuring probe is flush with the outer surface of the target irradiation wall; brush the coating to be tested onto the outer surface of the target irradiation wall to form the coating to be tested, and cover the embedded first temperature detector; after the coating dries, attach a third temperature detector to the outer surface of the coating to measure the surface temperature of the coating. With the target irradiation wall in a coated state, the light source simulation component is activated to obtain the temperature of each probe after the coating is applied, and the corresponding coating bottom temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature are obtained.
[0107] The measured temperature data is then used to calculate and evaluate the reflective heat insulation performance of the coating under test. All temperature probes used were type K thermocouples, connected to a multi-channel temperature monitoring and testing instrument to simultaneously measure and record multiple temperatures, which were then saved as curves. The table below shows the temperature measurements before and after the reflective heat-insulating coating was applied.
[0108]
[0109] The reflective heat insulation efficiency of the coating under test was calculated using the formula for calculating reflective heat insulation efficiency. It is 65.6%.
[0110] The difference between indoor and outdoor temperatures represents the heating effect of the gas, which can be used to visually evaluate the overall heat insulation and cooling effect of buildings coated with reflective insulation materials.
[0111] In this embodiment, without the coating, the indoor temperature rise is ΔT(40-50) = T40 - T50 = 2.1℃, and the first temperature difference is 2.1℃. With the coating, the indoor temperature rise is ΔT(41-51) = T41 - T51 = 1.4℃, indicating that applying the coating to be tested lowers the temperature by 0.7℃ compared to not having the coating.
[0112] When no coating is applied, the surface directly illuminated by the light source is the substrate OSB board, and its surface temperature is... The temperature was 56.3℃. After the coating was applied, the surface directly illuminated by the light source was the coating, and the surface temperature of the coating was... The temperature difference is 43.3℃. This temperature difference represents the cooling effect caused by reflection from the coating surface when the incident light intensity is the same, thus allowing the calculation of the coating surface cooling coefficient. =13℃, indicating that the tested coating has good reflective and heat-insulating effects on the light source. The surface temperature of the coating... and coating bottom surface temperature Data was used to calculate the coating's thermal insulation coefficient. = =3.8℃, indicating that the coating under test has a certain heat insulation effect.
[0113] For example, the building material retaining wall is replaced with galvanized iron sheet; the initial coating thickness is 0.302 mm, the coating to be tested is paint C, and an embedded first temperature detector is covered to measure the temperature between the coating bottom surface and the substrate. Following the above procedure, multiple temperatures were measured and recorded to obtain temperature values before and after the coating to be tested was applied to the target irradiation wall. The overall reflective heat insulation efficiency of the coating at that thickness was then calculated. Then, the process was repeated, with the coating material being applied again to the existing surface to increase its thickness. The overall reflective heat insulation efficiency of the coating at different thicknesses was measured. , and .
[0114] Reference Figure 4 Different coating thicknesses The corresponding measured comprehensive reflective heat insulation efficiency Plot the graph and use linear fitting to obtain a straight-line function: The fitting results are as follows: 0.6558, 0.1808. Wherein, the intercept... Corresponding coating thickness Reflective heat insulation efficiency approaching 0 That is, the reflective heat insulation effect of the coating without considering the coating thickness. This represents the intrinsic reflectivity of the light source without considering heat conduction. Coating C has a relatively high... This indicates that it has a strong ability to reflect light from light sources.
[0115] Fitting slope coefficient This represents the reflective heat insulation efficiency of the coating. The situation changes as thickness increases. (Using...) As an indicator of the intrinsic thermal insulation capability of the coating itself without considering reflection, coating C has a relatively small... This indicates that the coating is not effective at isolating the heat generated by the light source.
[0116] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.
Claims
1. A system for testing the reflective heat insulation performance of a coating, characterized in that, The system includes: a light source simulation component, a first temperature detector, a second temperature detector, a third temperature detector, an indoor and outdoor temperature detection component, and a control module; The light source simulation component is used to adjust the simulated light source and control the simulated light source to illuminate the target illumination wall; One side of the target illumination wall faces the outside and coincides with the light surface of the light source simulation component. The target illumination wall is coated with the coating to be tested on one side, and the other side of the target illumination wall faces the indoor environment. The first temperature detector is located on one side of the target irradiation wall. The first temperature detector is used to detect the bottom surface temperature of the coating to be tested and the outer surface temperature when the target irradiation wall has no coating to be tested. The second temperature detector is located on the other side of the target irradiation wall, and the second temperature detector is used to detect the inner surface temperature of the target irradiation wall; The third temperature detector is used to detect the surface temperature of the coating to be tested; The indoor and outdoor temperature detection components are used to detect indoor and outdoor temperatures; The control module is used to evaluate and determine the reflective heat insulation performance of the coating under test based on the corresponding outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature and outdoor temperature under various coating states of the target irradiation wall.
2. The system according to claim 1, characterized in that, The system further includes a temperature monitoring component; the temperature monitoring component is used to calibrate the first temperature detector, the second temperature detector, the third temperature detector, and the indoor / outdoor temperature detection component.
3. The system according to claim 1, characterized in that, The target irradiation wall has mounting slots inside, which are used to fix the first temperature detector when the target irradiation wall has a coating to be tested.
4. A method for testing the reflective heat insulation performance of a coating, characterized in that, The method includes: Based on the set irradiation requirements, a simulated indoor environment is constructed, a target irradiation wall is selected from the indoor environment, and the light source simulation component is activated. The simulated light source is adjusted and controlled to irradiate the target irradiation wall. The target irradiation wall is painted in two states: coated and uncoated. When in the uncoated state, the outer surface temperature of the target irradiated wall detected by the first temperature detector, the inner surface temperature of the target irradiated wall detected by the second temperature detector, and the indoor and outdoor temperatures detected by the indoor and outdoor temperature detection components are obtained. Turn off the light source simulation component, apply the coating to be tested to the side of the target wall that is illuminated by light to form the coating to be tested, cover the first temperature detector, and set a third temperature detector on the outer surface of the coating to be tested. When the coating is in place, the light source simulation component is activated to obtain the coating bottom temperature detected by the first temperature detector and the coating surface temperature detected by the third temperature detector, and the inner surface temperature, indoor temperature and outdoor temperature are obtained again. With the target irradiation wall in various coating states, the reflective heat insulation performance of the coating under test is evaluated and determined based on the outer surface temperature, coating bottom surface temperature, coating surface temperature, inner surface temperature, indoor temperature, and outdoor temperature.
5. The method according to claim 4, characterized in that, The evaluation determines the reflective heat insulation performance of the coating under test, including: Based on the outer surface temperature in the uncoated state and the inner surface temperature and the temperature of the bottom surface of the coating when the coating is in the coated state. and the inner surface temperature The formula for calculating reflective heat insulation efficiency. ， Determine the reflective heat insulation efficiency of the coating under test. .
6. The method according to claim 4, characterized in that, The evaluation determines the reflective heat insulation performance of the coating under test, including: Based on the outer surface temperature in the uncoated state and the surface temperature of the coating in the coated state Determine the surface cooling coefficient of the coating. , = ; According to the temperature of the bottom surface of the coating when it is in the coated state and the surface temperature of the coating Determine the thermal insulation coefficient of the coating. , = ; Wherein, the surface cooling coefficient of the coating The thermal insulation coefficient of the coating is used to characterize the reflected light source thermal properties of the coating material under test. Characterizes the thermal insulation performance of the coating to be tested in the coating to be tested.
7. The method according to claim 4, characterized in that, The evaluation determines the reflective heat insulation performance of the coating under test, including: A first temperature difference in the uncoated state is determined based on the indoor temperature and the outdoor temperature in the uncoated state. A second temperature difference in the coated state is determined based on the indoor temperature and the outdoor temperature in the coated state. The overall thermal insulation performance of the coating on the building is evaluated based on the difference between the first temperature difference and the second temperature difference.
8. The method according to claim 5, characterized in that, The method further includes: The test coating is repeatedly applied to the side of the target wall that is exposed to light, and the current thickness of the test coating is measured each time it is applied. Based on the current thickness, the reflective heat insulation efficiency corresponding to the current thickness is repeatedly calculated; The coating thickness is obtained by performing a linear fit between the current thickness and the reflective heat insulation efficiency. With reflective heat insulation efficiency linear function The intrinsic properties of the coating under test are evaluated using the linear function.
9. The method according to claim 4, characterized in that, The method further includes: An installation slot is made on the side of the target irradiation wall that is exposed to light, and the first temperature detector is embedded in the installation slot. When the paint to be tested is applied to the side of the target irradiation wall exposed to light, the embedded first temperature detector is covered.
10. The method according to claim 4, characterized in that, The method further includes: Determine whether the temperature changes of the outer surface temperature, the inner surface temperature, the indoor temperature, and the outdoor temperature are all greater than the set temperature stability threshold. If so, then the currently recorded outer surface temperature, inner surface temperature, indoor temperature, and outdoor temperature will be removed.