A method for testing and evaluating the thermal insulation performance of ready-made clothing

Abstract

The invention discloses a method for testing and evaluating the thermal insulation performance of ready-made clothing, including a subjective evaluation method and an objective evaluation method. After adopting the technical solution of the invention, the subjective evaluation can directly reflect the experience of consumers. The basic principle of adopting the cooling rate method to test and evaluate the thermal insulation performance of ready-made clothing in the objective evaluation is that after simulating the heat exchange between human body-clothing-environment to reach a steady state, when the surface temperature of a warm manikin drops from the normal human body surface temperature to the process of tending to the ambient temperature, the speed of change of the surface skin temperature of the warm manikin, that is, the cooling rate, can be better evaluated by combining the subjective evaluation and the objective evaluation. The thermal insulation performance of ready-made clothing under different environmental conditions.

Description

Technical Field

[0001] The invention relates to a method for testing and evaluating the thermal insulation performance of ready-made clothes. Background Art

[0002] Warmth retention is one of the most important indicators of clothing performance. Currently, the test for warmth retention is based on GB / T11048-2008 "Determination of thermal resistance and moisture resistance of textiles under steady-state conditions of physiological comfort". The environmental conditions in this test method (temperature 20°C, humidity 65%) are inconsistent with the actual application scenarios, the test samples (sewn sample packages) are inconsistent with the actual products used (ready-made clothes), and the test results (thermal resistance, moisture resistance and Crowe value) are inconsistent with consumer experience (warmth retention). Therefore, it cannot accurately reflect the warmth retention performance of clothing under different environmental conditions during actual use.

[0003] In view of this, the inventor conducted in-depth research on the above-mentioned issues, and thus the present case was produced. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a method for evaluating the thermal insulation performance of ready-made clothes more realistically and objectively.

[0005] The specific technical solution adopted by the present invention is:

[0006] A method for testing and evaluating the thermal insulation performance of ready-made clothing, including an objective evaluation method, which is carried out in the following manner:

[0007] After the clothed manikin is heated to dynamic thermal equilibrium, the heating is stopped and the process of the manikin's surface temperature dropping from normal human body temperature to ambient temperature is recorded. That is, when the manikin's surface temperature stops cooling, the speed of change of the manikin's surface skin temperature is recorded, that is, the cooling rate. When the cooling rate is less than or equal to a certain value, it is objectively evaluated as qualified; when the cooling rate is greater than a certain value, it is objectively evaluated as unqualified.

[0008] Preferably, the above-mentioned test and evaluation method also includes a subjective evaluation method, which is performed in the following manner: in a steady-state environment, the thermal sensation characteristics of the test individual are divided into different levels, and after the test individual wears the garment sample and enters the climate chamber, the test is started after the surface skin temperature of the test individual and the temperature of the climate chamber are stable. At regular intervals, the thermal sensation characteristic level of the test individual is recorded, and the proportion of the thermal sensation characteristic level that meets the comfort level is counted. When the proportion is greater than or equal to a certain value, the subjective evaluation is qualified, and when the proportion is less than a certain value, the subjective evaluation is unqualified;

[0009] When both the subjective evaluation and the objective evaluation are qualified, the warmth retention of the garment is judged to be qualified; otherwise, the warmth retention of the garment is judged to be unqualified.

[0010] In the above technical solution, in the objective evaluation method, the basic equation for calculating the cooling rate is:

[0011]

[0012] Where: V 总 ——cooling rate, °C / min;

[0013] C io ——initial surface skin temperature of the ith zone of the manikin, °C;

[0014] C ni —— Warm manikin Part I n Surface skin temperature after minutes, °C;

[0015] N i ——area factor of the ith zone of the manikin;

[0016] t n ——time for the manikin to stop cooling, min;

[0017] Where: N i The basic calculation equation is:

[0018]

[0019] Where: N i ——area factor of the ith zone of the manikin;

[0020] A n ——Net surface area of ​​the upper body of the manikin, m 2 ;

[0021] A i ——Surface area of ​​the ith zone of the manikin, m 2 ; A i ——Surface area of ​​the ith zone of the manikin, m 2 ; i=1, ...., x; x is the number of partitions, and the sum of the surface areas of the x partitions is equal to the net surface area of ​​the upper body of the manikin.

[0022] In the above technical scheme, assuming that the temperature of the climate chamber is X, when X>5°C, the cooling rate of men's ready-made clothes is ≤0.90, then the objective evaluation is judged to be qualified, and the cooling rate of women's ready-made clothes is ≤1.15, then the objective evaluation is judged to be qualified; -5°C≤X, and X≤5°C, the cooling rate of men's ready-made clothes is ≤1.05, then the objective evaluation is judged to be qualified, and the cooling rate of women's ready-made clothes is ≤1.45, then the objective evaluation is judged to be qualified; -15°C<X, and X<-5°C, the cooling rate of men's ready-made clothes is ≤1.25, then the objective evaluation is judged to be qualified, and the cooling rate of women's ready-made clothes is ≤1.75, then the objective evaluation is judged to be qualified; when X≤-15°C, the cooling rate of men's ready-made clothes is ≤1.50, then the objective evaluation is judged to be qualified, and the cooling rate of women's ready-made clothes is ≤2.20, then the objective evaluation is judged to be qualified.

[0023] In the above technical solution, the subjective evaluation method comprises the following steps:

[0024] Step A1: Under a steady-state environment, the thermal sensation characteristics of the test individual are divided into a symmetrical, bipolar, seven-level scale to form a thermal sensation table. The thermal sensation table is as follows:

[0025] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3

[0026] Step A2: After the test individual wears the garment sample and enters the climate chamber, the test begins after the test individual's skin temperature and the climate chamber temperature are stable. At regular intervals, the subjective test results are recorded according to the heat sensation table response number distribution table. The heat sensation table response number distribution table is as follows:

[0027] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3 Number of replies <![CDATA[n1]]> <![CDATA[n2]]> <![CDATA[n3]]> <![CDATA[n4]]> <![CDATA[n5]]> <![CDATA[n6]]> <![CDATA[n7]]>

[0028] Step A3: Calculate the thermal comfort probability using the following formula:

[0029]

[0030] Where: PTC – probability of thermal comfort;

[0031] n i ——represents the number of responses for a given level, i=1,2,3,4,5,6,7.

[0032] In the above technical solution, in step A2, the subjective test results are recorded every 5 minutes according to the distribution table of the number of responses to the heat sensation table. The test time is 30 minutes, and each garment requires at least 5 test subjects to conduct subjective evaluation.

[0033] In the above technical solution, when the probability of thermal comfort is ≥90%, the subjective evaluation is qualified, and when the probability of thermal comfort is <90%, the subjective evaluation is unqualified.

[0034] The beneficial effect of the present invention is that after adopting the technical scheme of the present invention, subjective evaluation can directly reflect the experience of consumers. The basic principle of using the cooling rate method to test and evaluate the thermal insulation performance of ready-made clothes in objective evaluation is that after simulating the heat exchange between human body, clothing and environment to reach a steady state, the surface temperature of the thermal manikin drops from the normal human body surface temperature to the ambient temperature. The speed of change of the skin temperature of the thermal manikin surface, that is, the cooling rate, can be better evaluated by combining subjective evaluation and objective evaluation. The thermal insulation performance of ready-made clothes under different environmental conditions. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with embodiments, but the embodiments of the present invention are not limited thereto. Without departing from the above-mentioned technical concept of the present invention, various substitutions and changes are made according to common technical knowledge and customary means in the field, which should all be included in the scope of the present invention.

[0036] The embodiment of the present invention provides a method for testing and evaluating the thermal insulation performance of ready-made clothing, including a subjective evaluation method and an objective evaluation method.

[0037] The subjective evaluation method is carried out in the following manner: Under a steady-state environment, the thermal sensation characteristics of the test individuals are divided into different levels. After the test individuals wear the clothing samples and enter the climate chamber, the test begins after the surface skin temperature of the test individuals and the temperature of the climate chamber are stable. At regular intervals, the thermal sensation characteristic level of the test individuals is recorded, and the percentage of thermal sensation characteristic levels that meet the comfort level is counted. When the percentage is greater than or equal to a certain value, the subjective evaluation is qualified. When the percentage is less than a certain value, the subjective evaluation is unqualified. In the above scheme, in the subjective evaluation method, it is divided into the following steps:

[0038] Step A1: Under a steady-state environment, the thermal sensation characteristics of the test individual are divided into a symmetrical, bipolar, seven-level scale to form a thermal sensation table. The thermal sensation table is as follows:

[0039] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3

[0040] Step A2: After the test individual wears the garment sample and enters the climate chamber, the test begins after the test individual's skin temperature and the climate chamber temperature are stable. At regular intervals, the subjective test results are recorded according to the heat sensation table response number distribution table. The heat sensation table response number distribution table is as follows:

[0041] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3 Number of replies <![CDATA[n1]]> <![CDATA[n2]]> <![CDATA[n3]]> <![CDATA[n4]]> <![CDATA[n5]]> <![CDATA[n6]]> <![CDATA[n7]]>

[0042] Step A3: Under a certain steady-state environment, after wearing the garment sample, the test individuals obtain physiological and psychological cold and hot sensations within a specified period of time and use the thermal sensation scale to evaluate the level. The proportion of individuals with thermal sensation evaluation levels of -1, 0, and 1 in the test group to the total test group is obtained, that is, the thermal comfort probability. The thermal comfort probability value is the subjective evaluation result of the garment warmth. The thermal comfort probability is calculated using the following formula:

[0043]

[0044] Where: PTC – probability of thermal comfort;

[0045] n i ——represents the number of responses for a given level, i=1,2,3,4,5,6,7.

[0046] In the above scheme, in step A2, the subjective test results are recorded every 5 minutes according to the distribution table of the number of responses in the thermal sensation scale. The test time is 30 minutes. If the two extremes in the thermal sensation scale appear during this period, the test is stopped immediately. Each garment requires at least 5 test subjects to conduct subjective evaluation.

[0047] In the above scheme, when the probability of thermal comfort is ≥90%, the subjective evaluation is qualified, and when the probability of thermal comfort is <90%, the subjective evaluation is unqualified.

[0048] The objective evaluation method is carried out in the following way:

[0049] After the manikin wearing ready-made clothes is heated to dynamic thermal equilibrium, stop heating and record the process of the manikin's surface temperature dropping from normal human body surface temperature to the ambient temperature, that is, when the manikin's surface temperature stops cooling, the speed of change of the manikin's surface skin temperature, that is, the cooling rate, and record it at least once every 1 minute. This state must be maintained for more than 10 minutes. For the same sample, the wearing and taking off test must be repeated 3 times, and the time interval between each test must be at least 15 minutes.

[0050] When the cooling rate is less than or equal to a certain value, the objective evaluation is qualified; when the cooling rate is greater than a certain value, the objective evaluation is unqualified;

[0051] When both the subjective evaluation and the objective evaluation are qualified, the warmth retention of the garment is judged to be qualified; otherwise, the warmth retention of the garment is judged to be unqualified.

[0052] Cooling rate: In a steady-state environment, after the temperature of each part of the manikin reaches the set temperature and is in dynamic equilibrium, the power input is stopped, and the speed of change of the manikin's surface skin temperature per unit time. The unit is ℃ / min.

[0053] In the above scheme, the basic equation for calculating the cooling rate is:

[0054]

[0055] Where: V 总 ——cooling rate, °C / min;

[0056] C io ——initial surface skin temperature of the ith zone of the manikin, °C;

[0057] C ni —— Warm manikin Part I n Surface skin temperature after minutes, °C;

[0058] N i ——area factor of the ith zone of the manikin;

[0059] t n ——time for the manikin to stop cooling, min;

[0060] Where: N i The basic calculation equation is:

[0061]

[0062] Where: N i ——area factor of the ith zone of the manikin;

[0063] A n ——Net surface area of ​​the upper body of the manikin, m 2 ;

[0064] A i ——Surface area of ​​the ith zone of the manikin, m 2 ; i=1, ...., x; x is the number of partitions, and the sum of the surface areas of the x partitions is equal to the net surface area of ​​the upper body of the manikin.

[0065] The embodiment of the present invention directly obtains the body surface areas of the upper body of male and female heating manikins and the ten sub-areas of the upper body of male and female heating manikins, namely, the front abdomen, front chest, shoulder, back neck, back, back waist, left upper arm, left forearm, right upper arm and right forearm, according to the three-dimensional cutting method, and then obtains the area factors of each sub-area of ​​the upper body of male and female heating manikins. At this time, i=1, 2, 3, 4, 5, 6, 7, 8, 9, 10;

[0066] The evaluation system of the warmth function of ready-made clothing is as follows:

[0067]

[0068] Embodiment 1:

[0069] The test garments are: cotton coat (175 / 92A); 5 male testers participated in the test, and their specific height, weight and health status are as follows:

[0070] Tester ID M1 M2 M3 M4 M5 Height (cm) 174.0 175.3 174.8 176.1 175.0 Weight(kg) 74.0 72.3 73.0 75.2 76.0 Age (years old) 26 27 25 26 28 Health status healthy healthy healthy healthy healthy

[0071] The temperature of the climate chamber is: 10℃.

[0072] The thermal sensation scales of the five testers at different time points are as follows:

[0073]

[0074] Fill in the distribution table of the number of responses to the heat sensation table based on the test results, as follows:

[0075] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3 Number of replies 0 0 0 3 2 0 0

[0076] Calculate the thermal comfort probability:

[0077]

[0078] The probability of thermal comfort is >90%, and the subjective evaluation is qualified.

[0079] After the male heated manikin wearing the sample is heated until the temperature of each part reaches the set temperature and is in dynamic equilibrium, stop inputting power and record the temperature change value of each part, at least once every 1 minute, until the surface temperature of the heated manikin stops cooling down. Repeat the wearing and taking off test 3 times, with an interval of 15 minutes between each test. The test results are as follows:

[0080] frequency 1st time 2nd time 3rd <![CDATA[Cooling rate V 总 > 0.82 0.83 0.84

[0081] The cooling rate each time was less than 0.90, and the objective evaluation was qualified.

[0082] Both the subjective and objective evaluations are qualified, and the warmth retention of the garment is qualified.

[0083] Embodiment 2

[0084] The test garments are: cotton coats (165 / 88A); 5 female testers participated in the test, and their specific height, weight and health status are as follows:

[0085] Tester ID M1 M2 M3 M4 M5 Height (cm) 164.5 165.4 164.8 166.0 165.7 Weight(kg) 49.0 51.3 47.5 53.2 51.0 Age (years old) 26 25 25 27 24 Health status healthy healthy healthy healthy healthy

[0086] The temperature of the climate chamber is: 10℃.

[0087] The thermal sensation scales of the five testers at different time points are as follows:

[0088]

[0089] Fill in the distribution table of the number of responses to the heat sensation table based on the test results, as follows:

[0090]

[0091]

[0092] The thermal comfort probability is calculated as:

[0093]

[0094] The probability of thermal comfort is >90%, and the subjective evaluation is qualified.

[0095] After the female heated manikin wearing the sample is heated until the temperature of each part reaches the set temperature and is in dynamic equilibrium, stop inputting power and record the temperature change value of each part, at least once every 1 minute, until the surface temperature of the heated manikin stops cooling down. Repeat the wearing and taking off test 3 times, with an interval of 15 minutes between each test. The test results are as follows:

[0096] frequency 1st time 2nd time 3rd <![CDATA[Cooling rate V 总 > 0.99 0.99 1.00

[0097] The cooling rate each time was less than 1.15, and the objective evaluation was qualified.

[0098] Both the subjective and objective evaluations are qualified, and the warmth retention of the garment is qualified.

[0099] Embodiment 3

[0100] The difference between Example 3 and Example 2 is that the temperature of the climate chamber is -5°C. The test data are as follows:

[0101] The thermal sensation scales of the five testers at different time points are as follows:

[0102]

[0103] Fill in the distribution table of the number of responses to the heat sensation table based on the test results, as follows:

[0104]

[0105]

[0106] The thermal comfort probability is calculated as:

[0107]

[0108] The probability of thermal comfort is less than 90%, and the subjective evaluation is unqualified.

[0109] After the female heated manikin wearing the sample is heated until the temperature of each part reaches the set temperature and is in dynamic equilibrium, stop inputting power and record the temperature change value of each part, at least once every 1 minute, until the surface temperature of the heated manikin stops cooling down. Repeat the wearing and taking off test 3 times, with an interval of 15 minutes between each test. The test results are as follows:

[0110] frequency 1st time 2nd time 3rd <![CDATA[Cooling rate V 总 > 1.62 1.60 1.63

[0111] The cooling rate each time was >1.45, which was objectively evaluated as unqualified.

[0112] Both the subjective and objective evaluations failed, and the warmth retention of the garment failed to meet the standards.

[0113] Embodiment 4

[0114] The test garment is: down jacket (175 / 92A); 5 male testers participated in the test, and their specific height, weight and health status are as follows:

[0115] Tester ID M1 M2 M3 M4 M5 Height (cm) 174.0 175.3 174.8 176.1 175.0 Weight(kg) 74.0 72.3 73.0 75.2 76.0 Age (years old) 26 27 25 26 28 Health status healthy healthy healthy healthy healthy

[0116] The temperature of the climate chamber is: -10℃.

[0117] The thermal sensation scales of the five testers at different time points are as follows:

[0118]

[0119]

[0120] Fill in the distribution table of the number of responses to the heat sensation table based on the test results, as follows:

[0121] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3 Number of replies 0 0 2 3 0 0 0

[0122] The thermal comfort probability is calculated as:

[0123]

[0124] The probability of thermal comfort is >90%, and the subjective evaluation is qualified.

[0125] After the male heated manikin wearing the sample is heated until the temperature of each part reaches the set temperature and is in dynamic equilibrium, stop inputting power and record the temperature change value of each part, at least once every 1 minute, until the surface temperature of the heated manikin stops cooling down. Repeat the wearing and taking off test 3 times, with an interval of 15 minutes between each test. The test results are as follows:

[0126] frequency 1st time 2nd time 3rd <![CDATA[Cooling rate V 总 > 1.10 1.10 1.08

[0127] The cooling rate each time was less than 1.25, and the objective evaluation was qualified.

[0128] Both the subjective and objective evaluations are qualified, and the warmth retention of the garment is qualified.

[0129] Embodiment 5

[0130] The difference between Example 5 and Example 4 is that the temperature of the climate chamber is -25°C. The test data are as follows:

[0131] The thermal sensation scales of the five testers at different time points are as follows:

[0132]

[0133] Fill in the distribution table of the number of responses to the heat sensation table based on the test results, as follows:

[0134] Thermal sensation Very cold cold cold Comfort warm hot It's hot grade -3 -2 -1 0 +1 +2 +3 Number of replies 2 3 0 0 0 0 0

[0135] The thermal comfort probability is calculated as:

[0136]

[0137] The probability of thermal comfort is less than 90%, and the subjective evaluation is unqualified.

[0138] After the male heated manikin wearing the sample is heated until the temperature of each part reaches the set temperature and is in dynamic equilibrium, stop inputting power and record the temperature change value of each part, at least once every 1 minute, until the surface temperature of the heated manikin stops cooling down. Repeat the wearing and taking off test 3 times, with an interval of 15 minutes between each test. The test results are as follows:

[0139] frequency 1st time 2nd time 3rd <![CDATA[Cooling rate V 总 > 1.64 1.65 1.64

[0140] The cooling rate each time was >1.5, which was objectively evaluated as unqualified.

[0141] Both the subjective and objective evaluations failed, and the warmth retention of the garment failed to meet the standards.

[0142] Although the above embodiments have been described, once those skilled in the art know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the above description is only an embodiment of the present invention and does not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for testing and evaluating the thermal insulation performance of ready-made clothing, characterized in that: Including objective evaluation methods, the objective evaluation method is carried out in the following way: After the manikin wearing ready-made clothes is heated to a dynamic thermal equilibrium, the heating is stopped, and the process of the manikin's surface temperature dropping from the normal human body surface temperature to the ambient temperature is recorded, that is, when the manikin's surface temperature stops cooling, the speed of the change of the manikin's surface skin temperature is the cooling rate. If the cooling rate is less than or equal to a certain value, the objective evaluation is qualified, and if the cooling rate is greater than a certain value, the objective evaluation is unqualified; In the objective evaluation method, the basic equation for calculating the cooling rate is: ； Where: V 总 ——cooling rate, °C / min; C io ——initial surface skin temperature of the ith zone of the manikin, °C; C ni —— Warm manikin Partition i n Surface skin temperature after minutes, °C; N i ——area factor of the ith zone of the manikin; t n ——Time for the manikin to stop cooling, min; Where: N i The basic calculation equation is: Where: N i ——area factor of the ith zone of the manikin; A n ——Net surface area of ​​the upper body of the manikin, m 2 ; A i ——Surface area of ​​the ith zone of the manikin, m 2 ; i=1, ...., x; x is the number of partitions, and the sum of the surface areas of the x partitions is equal to the net surface area of ​​the upper body of the manikin; Assume that the temperature of the climate chamber is X, when X>5℃, the cooling rate of men's ready-made clothes is ≤0.90, and the objective evaluation is qualified; the cooling rate of women's ready-made clothes is ≤1.15, and the objective evaluation is qualified; -5℃≤X, and X≤5℃, the cooling rate of men's ready-made clothes is ≤1.05, and the objective evaluation is qualified; the cooling rate of women's ready-made clothes is ≤1.45, and the objective evaluation is qualified; -15℃<X, and X<-5℃, the cooling rate of men's ready-made clothes is ≤1.25, and the objective evaluation is qualified; the cooling rate of women's ready-made clothes is ≤1.75, and the objective evaluation is qualified; when X≤-15℃, the cooling rate of men's ready-made clothes is ≤1.50, and the objective evaluation is qualified; the cooling rate of women's ready-made clothes is ≤2.20, and the objective evaluation is qualified.

2. A method for testing and evaluating the thermal insulation performance of ready-made clothing according to claim 1, characterized in that: The subjective evaluation method is also included. The subjective evaluation method is performed in the following manner: in a steady-state environment, the thermal sensation characteristics of the test individuals are divided into different levels. After the test individuals wear the garment samples and enter the climate chamber, the test is started after the surface skin temperature of the test individuals and the temperature of the climate chamber are stable. At regular intervals, the thermal sensation characteristic level of the test individuals is recorded, and the proportion of thermal sensation characteristic levels that meet the comfort level is counted. When the proportion is greater than or equal to a certain value, the subjective evaluation is qualified. When the proportion is less than a certain value, the subjective evaluation is unqualified. When both the subjective evaluation and the objective evaluation are qualified, the warmth retention of the garment is judged to be qualified; otherwise, the warmth retention of the garment is judged to be unqualified.

3. A method for testing and evaluating the thermal insulation performance of ready-made clothing according to claim 2, characterized in that: The subjective evaluation method comprises the following steps: Step A1: Under a steady-state environment, the thermal sensation characteristics of the test individuals are divided into a symmetrical, bipolar seven-level scale to form a thermal sensation scale, which includes thermal sensation and level. The seven-level scale is: very cold (-3 level), cold (-2 level), cool (-1 level), comfortable (0 level), warm (+1 level), hot (+2 level), very hot (+3 level); Step A2: After the test individual wears the garment sample and enters the climate chamber, the test is started after the surface skin temperature of the test individual and the temperature of the climate chamber are stable. At regular intervals, the subjective test results are recorded according to the distribution table of the number of responses of the heat sensation table. The distribution table of the number of responses of the heat sensation table includes heat sensation, level, and number of responses n; the number of responses of the seven-level division from very cold to very hot is n1, n2, n3, n4, n5, n6, and n7 respectively; Step A3: Calculate the thermal comfort probability using the following formula: ； Where: PTC——Probability of thermal comfort; n i ——represents the number of responses for a given level, i=1,2,3,4,5,6,7.

4. A method for testing and evaluating the thermal insulation performance of ready-made clothing according to claim 3, characterized in that: In step A2, the subjective test results are recorded every 5 minutes according to the distribution table of the number of responses to the heat sensation table. The test time is 30 minutes, and each garment requires at least 5 test subjects to conduct subjective evaluation.

5. A method for testing and evaluating the thermal insulation performance of ready-made clothing according to claim 4, characterized in that: When the probability of thermal comfort is ≥90%, the subjective evaluation is qualified; when the probability of thermal comfort is <90%, the subjective evaluation is unqualified.

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