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System and method for testing heating function of electric heating piece for clothes

An electric heating element and heating element technology, applied in the field of physical inspection, can solve the problems of expensive models, cumbersome operations, and data that do not have reference value, and achieve the effect of accurate evaluation.

Active Publication Date: 2021-03-26
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The infrared imager must keep a certain distance from the surface to be tested during use, so it requires a large test space and is difficult to use in a small environmental chamber
During the test, there cannot be any optical occlusion between the instrument and the surface to be tested, and the surface of the sample to be tested cannot be covered with any fabric, so it is impossible to simulate the actual working state of the heating element in the clothing (because in actual use, the electric heating element is usually It is configured to be used in winter clothes. If it is not covered during the experiment, the difference between the test environment and the actual use environment is huge, and the obtained data will not have reference value)
In addition, such instruments are usually operated manually, and models that can automatically measure and record temperature data are more expensive
[0003] At present, there are still a few studies that use resistance thermometers for contact temperature measurement. When using this type of thermometer for testing, it is often a single-point temperature measurement, which has low efficiency, poor reproducibility, and cumbersome operation.
[0004] Moreover, the existing instruments and methods require manual data screening and processing, and the average temperature, heating rate, temperature distribution coefficient and other data can only be obtained after a large number of calculations.
[0005] At present, the annual production of electric heating sheets for clothing in my country has exceeded one million pieces, but each production enterprise and application unit has not yet unified and standardized instruments and methods for testing and evaluating its heating function, so that it is impossible to accurately propose appropriate heating sheets in the application. technical indicators

Method used

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  • System and method for testing heating function of electric heating piece for clothes
  • System and method for testing heating function of electric heating piece for clothes
  • System and method for testing heating function of electric heating piece for clothes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Test the heating function of the electric heating sheet sample a, the external size of the electric heating sheet is 24*14cm 2 , effective heating area 20*10cm 2 . The size of the heating sheet test package is 25*15cm 2 , The material is pure cotton standard cloth, the thickness is 0.34mm, and the thermal resistance is 0.43clo. The temperature in the environment box is set at 20°C and the relative humidity is 60%. Connect 9 test points and record the surface temperature curve of the heating plate after it is powered on. According to the measured temperature curve (such as Figure 3-1 to Figure 3-9 shown) can simultaneously obtain the corresponding time and temperature data.

[0124] According to the temperature and time recorded on the temperature curve of each point, the average maximum temperature T after the temperature of the heating plate is stable can be calculated max .

[0125]

[0126] T of heating plate a max It is 39.1°C, which is higher than the a...

Embodiment 2

[0137] Example 2 The heating function of the electric heating sheet sample b in a low temperature environment is tested, and the external size of the electric heating sheet is 24*14cm 2 , the effective heating area is 20*10cm 2 . The size of the heating sheet test package is 25*15cm 2 , The material is polyester fiber flakes, the thickness is 27.8mm, and the thermal resistance is 2.45clo. The temperature in the test box is set at -30°C and the relative humidity is 40%. Connect 5 test points ( figure 2 1 center point and the points at the four corners), record the surface temperature curve of the heating plate after the power supply is turned on, such as Figure 4-1 to Figure 4-5 shown.

[0138] According to the temperature and time recorded on the temperature curve of each point, the average maximum temperature T after the temperature of the heating plate is stable can be calculated max .

[0139]

[0140] It can be seen from this that the average maximum temperatur...

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Abstract

The invention provides a system and method for testing the heating function of an electric heating piece for clothes, and belongs to the field of physical detection. The system comprises a cabinet body which is divided into an environment box and an equipment box; wherein a test platform is arranged at the bottom in an inner cavity of the environment box, a heating piece test pack is arranged on the test platform, and an electric heating sheet to be tested is placed in the heating piece test pack; a heating piece temperature testing device is arranged in the environment box and is used for testing the temperature of the electric heating piece; a temperature and humidity control device is arranged in the equipment box and used for controlling the temperature and the humidity in the environment box. According to the invention, the electric heating piece can be coated during testing, so that the use condition of the heating piece in a garment is accurately simulated, the temperature risecurve of multiple points on the electric heating sheet can be measured, and the average temperature, the temperature non-uniformity and the temperature rise rate in the effective heating area are calculated; and the heating function of the electric heating piece can be scientifically evaluated by utilizing the data.

Description

technical field [0001] The invention belongs to the field of physical detection, and in particular relates to a system and method for testing the heating function of an electric heating sheet for clothing. Background technique [0002] At present, there are no specific detection methods and instruments for electric heating sheets for clothing. In domestic and foreign researches, infrared imagers are mainly used to detect its temperature and temperature changes, and evaluate its heating function accordingly. The infrared imager must be kept at a certain distance from the surface to be tested during use, so the test space is required to be large, and it is difficult to use it in a small environmental chamber. During the test, there cannot be any optical occlusion between the instrument and the surface to be tested, and the surface of the sample to be tested cannot be covered with any fabric, so it is impossible to simulate the actual working state of the heating element in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 张天骄黄竻丹戴严云刘莉郑浩
Owner BEIJING INST OF CLOTHING TECH