Method for measuring effective heating power of intelligent heating clothes

Abstract

This invention discloses a method for measuring the effective heating power of intelligent heated clothing, relating to the field of clothing performance testing technology. The method involves placing the intelligent heated clothing under test on the surface of a heated mannequin to determine the effective coverage area of ​​the clothing on the mannequin's surface; turning off the heating function of the clothing and activating the mannequin's constant temperature control mode, measuring and recording the mannequin's controlled heating power as a baseline; maintaining constant environmental conditions and set temperature, turning on the heating function of the clothing, measuring and recording the mannequin's controlled heating power, and calculating the instantaneous heating power; and calculating the effective heating power of the clothing based on the difference between the baseline heating power and the instantaneous heating power. This method can accurately and repeatedly measure the effective heating power of intelligent heated clothing.

Description

Technical Field

[0001] This invention relates to the field of clothing performance testing technology, specifically a method for measuring the effective heating power of intelligent heated clothing. Background Technology

[0002] In the research, development, production, and quality evaluation of smart heated clothing, accurately measuring its heating performance is one of the core issues. Currently, the industry generally uses "nominal power" or "input power" as evaluation indicators, which involves directly measuring the voltage and current across the heating element to calculate the electrical input power.

[0003] However, this evaluation method has obvious defects and cannot truly reflect the actual heating effect of clothing on the human body. (1) Electrical power is not equal to effective heating power: In actual use, the heat generated by the heating element of smart heating clothing does not all act on the human body. Some heat will be lost to the external environment through the outer layer of the clothing, some will be absorbed or buffered by the middle layer material of the clothing, and some will fluctuate due to the frequent switching of the temperature control system. Using only the electrical power at the input end as the evaluation index will overestimate the actual heat preservation contribution of the clothing; (2) Ignoring the influence of the thermal interaction environment: Existing test methods are often carried out in an idealized constant temperature and humidity chamber, without fully considering the interaction between the human body as a heat source and heat sink. The human body itself is a continuously heat-producing organism, and the actual heating effect of clothing depends on the dynamic balance between the heat supplied by the heating element, the heat generated by the human body itself, and the heat loss from the environment. Tests conducted outside the human body or equivalent thermal simulation body cannot reflect the effective heating capacity under actual wearing conditions; (3) Lack of unified evaluation standards: Currently, manufacturers on the market use different methods to label the nominal power. Some label the maximum instantaneous power of the heating element, while others label the output power of the battery. Moreover, the test conditions are not uniform, making it difficult for consumers to compare the actual heating performance of different products horizontally. This also hinders industry quality supervision and technological progress. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides a method for measuring the effective heating power of intelligent heated clothing, and proposes "effective heating power" as a core evaluation index, aiming to establish a quantitative evaluation index that can truly reflect the thermal contribution of intelligent heated clothing to the human body, so as to make up for the deficiencies of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, including: S1, placing the smart heating garment to be tested on the surface of a heated mannequin, and determining the effective coverage area set Ω of the smart heating garment on the surface of the heated mannequin; S2, under set environmental conditions, turning off the heating function of the smart heating garment to be tested, and activating the constant temperature control mode of the heated mannequin, so that the skin temperature of each covered area of ​​the heated mannequin is maintained at the set temperature. After the skin temperature of each covered area of ​​the heated mannequin reaches dynamic thermal equilibrium, the controlled heating power of the heated mannequin within the effective coverage area set Ω is measured and recorded as the reference heating power; S3, keeping the environmental conditions and set temperature unchanged, turning on the heating function of the smart heating garment to be tested. After the skin temperature of each covered area of ​​the heated mannequin reaches dynamic thermal equilibrium again, the controlled heating power of the heated mannequin within the effective coverage area set Ω is measured and recorded, and the instantaneous heating power is calculated. Under constant temperature control mode, the heated mannequin reduces its own output power according to the active heat supply of the smart heating garment to maintain the set temperature; S4, calculating the effective heating power H of the smart heating garment to be tested based on the difference between the reference heating power and the instantaneous heating power.

[0006] Preferably, the dynamic thermal balance determination criteria in step S2 and / or step S3 are: the average temperature fluctuation of the area covered by the warm body dummy is less than 0.2℃, and the fluctuation of the control input power of each area covered by the warm body dummy is stable within ±3% for a duration of more than 5 minutes.

[0007] Preferably, the reference heating power The calculation method is as follows: After reaching dynamic thermal equilibrium, the arithmetic average of the total controlled heating power of the covered area at each moment within a continuous time period is taken as the benchmark heating power, where the total controlled heating power of the covered area... for: ; In the formula, To achieve dynamic thermal equilibrium, the heating power density output of the warm body dummy in region i at time t is adjusted. Let be the surface area of ​​the i-th region.

[0008] Preferably, instantaneous heating power The calculation method is as follows: After reaching dynamic thermal equilibrium, the arithmetic mean of the total controlled heating power of the covered area at each moment within a continuous time T is taken as the value, where the total controlled heating power of the covered area is... for: ; In the formula, To achieve dynamic thermal equilibrium, the output heating power density of the warm body dummy at time t in region i is adjusted.

[0009] Preferably, the continuous time is 30 minutes.

[0010] Preferably, the skin temperature of each covered area of ​​the warm body dummy is set to 33°C to 35°C.

[0011] Preferably, the effective coverage area set Ω is determined as follows: the area of ​​the heated mannequin that is in direct contact with the surface of the heated mannequin under normal wearing conditions and can transfer heat through heat conduction or heat radiation is taken as the effective coverage area set Ω.

[0012] Preferably, the effective coverage area set Ω is determined by taking the area of ​​the heated dummy covered by the projection directly below the heating element in the smart heated clothing under test as the effective coverage area set Ω.

[0013] Preferably, the effective coverage area set Ω is determined by taking the entire area encompassed by the entire torso of the warm-body dummy as the effective coverage area set Ω.

[0014] Preferably, the set environmental conditions include: an ambient temperature set to any value within the range of -5℃ to -35℃, a relative humidity of 50%RH, and an ambient wind speed of 0m / s.

[0015] The advantages of this invention are: (1) An effective heating power evaluation index is proposed, which directly reflects the actual wearing effect of clothing and solves the problem of confusion between electrical power and effective heating power.

[0016] (2) Construct a power-on / off comparison stripping test method based on a warm body dummy. By measuring the interface heat flow and calculating the difference, the environmental heat loss and clothing structure interference are stripped away, so as to achieve direct and accurate determination of effective heating power.

[0017] (3) The test conditions are clear and the repeatability is good, providing a unified and quantifiable technical means for the performance evaluation of intelligent heated clothing.

[0018] (4) It has strong applicability and can select different regional value methods for clothing with different structures and different heating element layouts, thus having wide applicability. Attached Figure Description

[0019] Figure 1 A flowchart illustrating the testing method for intelligent heated clothing. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To address the shortcomings of existing technologies that evaluate heating performance solely based on electrical input power and fail to reflect the actual wearing effect, this invention aims to provide a testing method that can directly and accurately measure the effective heating power of smart heated clothing. By eliminating environmental heat loss and clothing structure interference, the net heating power actually contributed to the human body by the heating system is obtained, thereby filling the technological gap in the evaluation of key performance of smart heated clothing.

[0022] Unlike existing technologies that use electrical input power as an evaluation metric, this invention proposes for the first time the concept of "effective heating power," defining it as the net thermal energy power actually transferred by the heating system to the human body surface to compensate for heat loss. This clarifies the evaluation dimension based on the actual wearing effect. Specifically, effective heating power refers to the net thermal energy power actually transferred by the heating system of intelligent heated clothing to the human body surface (or an equivalent thermal simulator) per unit time to compensate for heat loss under simulated human wearing conditions.

[0023] This invention constructs a complete method for testing effective heating power: using a heated mannequin as the test carrier, a heat flow sensor is placed at the interface between the clothing and the mannequin surface. The interface heat flow is measured under both the steady-state conditions of the heating system being powered on and off. The difference is calculated to eliminate environmental heat loss and interference from the clothing structure, achieving a direct and accurate determination of the effective heating power. The heated mannequin can simulate the temperature distribution and heat exchange characteristics of the human body surface, providing realistic and controllable thermal boundary conditions for testing. This method has clearly defined test conditions and repeatable operation, forming a closed-loop technical solution.

[0024] Specifically, by Figure 1 As shown, a method for measuring the effective heating power of intelligent heated clothing includes the following steps: S1. The smart heating garment to be tested is worn on the surface of the warm body dummy, and the effective coverage area set Ω of the smart heating garment to be tested on the surface of the warm body dummy is determined.

[0025] This application uses a heated mannequin as a human thermal simulation carrier. The heated mannequin has independent temperature control function for its covered area, and can simulate the temperature distribution and metabolic heat generation characteristics of the human body surface. The surface of the mannequin is divided into multiple areas (such as chest, back, waist, abdomen, buttocks, etc.), and each area is equipped with an independent temperature sensor and heating element, which can control and measure the heating power density of the area separately.

[0026] First, after the mannequin is dressed in the smart heating garment to be tested, the effective coverage boundary of the garment is marked on the surface of the mannequin. The effective coverage area set Ω is defined as the area where the garment under test is in direct contact with the surface of the mannequin under normal wearing conditions and can transfer heat through thermal conduction or thermal radiation.

[0027] In one embodiment of this application, the effective coverage area set Ω for calculation is limited to the dummy area projected by the heating element, rather than the entire clothing coverage area. That is, for smart heating clothing with a small heating element area or a localized arrangement (such as waist support or knee support products), power can be collected only from the dummy area directly below the heating element. The advantage of this method is that it can eliminate heat loss interference from non-heated areas and more accurately reflect the heating efficiency of the heating element itself.

[0028] In one embodiment of this application, the effective coverage area set Ω is defined as all areas of the dummy's torso (chest, back, waist, abdomen, etc.), excluding non-covered areas. That is, for smart heating garments with a large heating element coverage area (such as a single piece of heating fabric), power can be collected from the entire torso of the heated dummy. This method is simple to operate, does not require marking the clothing coverage boundaries, and is suitable for rapid testing of products with large-area heating.

[0029] In one embodiment of this application, the effective coverage area set Ω is defined as the area in which the heated dummy is dressed in the smart heated clothing and matching garments to be tested, following a normal dressing sequence. The dummy's posture is adjusted so that its arms hang naturally at its sides, ensuring that the clothing fits the dummy's surface without obvious wrinkles, stacking, or abnormal tightness, simulating a real wearing condition.

[0030] The effective coverage area set Ω of the clothing is determined according to the above definition method, and the number of each coverage area is recorded. Subsequent test calculations are only performed on these coverage areas; data from non-covered areas are not included in the calculation. A pre-defined effective coverage area set Ω is established, corresponding to the entire dummy area covered by the intelligent heating clothing. The area of ​​each coverage area is denoted as... (i∈Ω).

[0031] S2. Under the set environmental conditions, turn off the heating function of the smart heated clothing under test, and start the constant temperature control mode of the heated mannequin to maintain the skin temperature of each covered area of ​​the heated mannequin at the set temperature. After the skin temperature of each covered area of ​​the heated mannequin reaches dynamic thermal equilibrium, measure and record the controlled heating power of the heated mannequin within the effective coverage area set Ω as the reference heating power. .

[0032] The test was conducted in an artificial climate chamber, which allows for precise control of ambient temperature, relative humidity, and wind speed. Before the test, the environmental parameters of the artificial climate chamber were set and allowed to stabilize. The settings were based on the applicable environment of the smart heated garment under test (-5℃, -15℃, -25℃, -35℃); relative humidity: 50%RH; ambient wind speed: 0m / s.

[0033] Turn off the heating function of the smart heated clothing (i.e., the clothing is not heating up). Activate the constant temperature control mode of the heated mannequin, setting the skin temperature of each covered area of ​​the mannequin to be maintained between 33~35℃ (simulating human body surface temperature), with a deviation of ±0.5℃. Continuously monitor the following parameters: skin temperature of each covered area of ​​the mannequin and the heating power of each covered area. Data acquisition frequency is no less than once per minute. In constant temperature control mode, the heated mannequin system automatically adjusts the output power of its internal heating modules according to changes in ambient temperature and the clothing worn, in order to maintain a constant surface temperature of the mannequin.

[0034] After the heated mannequin enters a dynamic thermal equilibrium state, the controlled heating power of each covered area of ​​the mannequin is recorded. The criteria for determining dynamic thermal equilibrium are: the average surface temperature fluctuation of the heated mannequin does not exceed ±0.2℃, and the fluctuation of the controlled input power of each covered area of ​​the mannequin is stable within ±3% for a duration of not less than 5 minutes.

[0035] After reaching dynamic thermal equilibrium, the total controlled heating power of the covered area is calculated at least once per minute, i.e.: ; in, To achieve dynamic thermal equilibrium, the controlled heating power density of region i at minute t is given, in watts per square meter (W / m²). 2 "Controlled heating power density" is the output value of the heated body dummy system, which is collected in real time by the heated body dummy system. It is calculated over a continuous time period (30 minutes in this application). The arithmetic mean of the heating power is used as the reference heating power. The unit is watts (W), and the calculation formula is: .

[0036] S3. Keeping the environmental conditions and set temperature constant, turn on the heating function of the smart heating garment under test. After the heated mannequin reaches dynamic thermal equilibrium again, measure and record the controlled heating power of the heated mannequin within the effective coverage area set Ω, and calculate the instantaneous heating power. In constant temperature control mode, the heated dummy actively reduces its own output power to maintain the set temperature by using the intelligent heating clothing to provide heat.

[0037] Maintain constant environmental parameters in the artificial climate chamber, clothing wearing status, and set skin temperature for the dummy. Activate the heating function of the intelligent heating clothing (select the test level as needed, such as low, medium, or high). If the dummy or instrument needs to be temporarily shut down during the test due to equipment adjustments, the interruption time must not exceed 5 minutes.

[0038] Continue to monitor the dummy's skin temperature and adjust the heating power of each covered area of ​​the dummy, with a sampling frequency of no less than once per minute, until the warmed dummy re-enters the dynamic thermal equilibrium state defined in S2.

[0039] After reaching dynamic thermal equilibrium, the total controlled heating power of the covered area is calculated at least once per minute, i.e.: , in, To achieve dynamic thermal equilibrium, the controlled heating power density of region i at minute t is given, in watts per square meter (W / m²). 2 ). Calculated over a continuous 30-minute period. The arithmetic mean of the instantaneous heating power H is used as the instantaneous heating power H. c The unit is watts (W), and the calculation formula is: .

[0040] S4: Effective heating power Defined as reference heating power Difference from instantaneous heating power The calculation formula is as follows: .

[0041] In this embodiment, smart heated clothing in both coat and vest styles was tested. The test temperature and test results are shown in Table 1 below.

[0042] Table 1 Test Results of Smart Heated Clothing

[0043] This invention can truly reflect product performance. The effective heating power can objectively and accurately characterize the heating efficiency of smart heated clothing in actual use scenarios, avoiding performance misjudgment caused by false labeling of electrical parameters or differences in test conditions.

[0044] This invention establishes a scientific evaluation system. By defining effective heating power, it can provide unified and quantifiable technical indicators for the research and development, production, quality inspection, and market supervision of intelligent heated clothing, thereby promoting the standardization process of the industry.

[0045] This invention can be used to guide product optimization design. Based on the test results of effective heating power, R&D personnel can quantitatively analyze the impact of heating element layout, insulation layer structure, and control strategy on actual heating effect, thereby making targeted optimizations to improve heat preservation performance while reducing energy consumption and extending battery life.

[0046] This invention helps protect consumer rights. As an objective indicator that can be directly compared, effective heating power can help consumers accurately understand the true heating capacity of a product and avoid being misled by false advertising.

[0047] By combining the above indicators and methods, this invention provides for the first time an effective heating power testing method that is quantifiable, reproducible, and comparable for the intelligent heating clothing industry. It solves the long-standing evaluation blind spot where electrical power does not equal actual heating effect and fills the technical gap in key performance evaluation in this field.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for measuring the effective heating power of intelligent heated clothing, characterized in that, Includes the following steps: S1. The smart heating garment to be tested is worn on the surface of the warm body dummy, and the effective coverage area set Ω of the smart heating garment to be tested on the surface of the warm body dummy is determined; S2. Under the set environmental conditions, turn off the heating function of the smart heating garment to be tested, start the constant temperature control mode of the warm body dummy, so that the skin temperature of each covered area of ​​the warm body dummy is maintained at the set temperature. After the skin temperature of each covered area of ​​the warm body dummy reaches dynamic thermal equilibrium, measure and record the controlled heating power of the warm body dummy in the effective coverage area set Ω as the reference heating power. S3. Keep the environmental conditions and the set temperature unchanged, turn on the heating function of the smart heating garment to be tested, and after the skin temperature of each covered area of ​​the warm body dummy reaches dynamic thermal equilibrium again, measure and record the controlled heating power of the warm body dummy in the effective coverage area set Ω, calculate the instantaneous heating power, and the warm body dummy reduces its own output power in the constant temperature control mode according to the active heat supply of the smart heating garment to maintain the set temperature. S4. Calculate the effective heating power H of the smart heating garment under test based on the difference between the reference heating power and the instantaneous heating power.

2. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The dynamic thermal balance determination criteria in step S2 and / or step S3 are as follows: the average temperature fluctuation of the area covered by the warm body dummy is less than 0.2℃, and the fluctuation of the control input power of each covered area of ​​the warm body dummy is stable within ±3% for a duration of more than 5 minutes.

3. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The reference heating power The calculation method is as follows: After reaching dynamic thermal equilibrium, the arithmetic average of the total controlled heating power of the covered area at each moment within a continuous time period is taken as the benchmark heating power, wherein the total controlled heating power of the covered area... for: ； In the formula, To achieve dynamic thermal equilibrium, the heating power density output of the warm body dummy in region i at time t is adjusted. Let be the surface area of ​​the i-th region.

4. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The instantaneous heating power The calculation method is as follows: After reaching dynamic thermal equilibrium, the arithmetic mean of the total controlled heating power of the covered area at each moment within a continuous time T is taken as the instantaneous heating power, wherein the total controlled heating power of the covered area... for: ； In the formula, To achieve dynamic thermal equilibrium, the output heating power density of the warm body dummy at time t in region i is adjusted.

5. The method for measuring the effective heating power of intelligent heated clothing according to claim 3 or 4, characterized in that, The continuous time is 30 minutes.

6. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The skin temperature of each covered area of ​​the warm-body dummy is set to be between 33°C and 35°C.

7. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The effective coverage area set Ω is determined as follows: the area of ​​the heated mannequin that is in direct contact with the surface of the heated mannequin under normal wearing conditions and can transfer heat through heat conduction or heat radiation is taken as the effective coverage area set Ω.

8. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The effective coverage area set Ω is determined by taking the area of ​​the heated dummy covered by the projection directly below the heating element in the smart heated clothing under test as the effective coverage area set Ω.

9. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The effective coverage area set Ω is determined by taking the entire area encompassed by the entire torso of the warm-body dummy as the effective coverage area set Ω.

10. The method for measuring the effective heating power of intelligent heated clothing according to claim 1, characterized in that, The set environmental conditions include: ambient temperature set to any value within the range of -5℃ to -35℃, relative humidity of 50%RH, and ambient wind speed of 0m / s.

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