Standard emission sample for environmental chamber combination property detection and its detection method

A technology of comprehensive performance and detection environment, which is applied in the direction of liquid tightness measurement using liquid/vacuum degree, measuring device, machine/structural component testing, etc. It can solve the problems of cumbersome, inconvenient operation, and inability to consider comprehensive performance, etc. Achieve the effect of easy operation, simple method, high precision and reliability

Active Publication Date: 2008-10-22
TSINGHUA UNIV
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Problems solved by technology

However, at present, a method is often only tested for one of the properties, and the overall performance cannot be considered; To compare the

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  • Standard emission sample for environmental chamber combination property detection and its detection method
  • Standard emission sample for environmental chamber combination property detection and its detection method
  • Standard emission sample for environmental chamber combination property detection and its detection method

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[0018] The standard distributed sample and its detection method for testing the comprehensive performance of the environmental cabin proposed by the present invention are described in detail as follows in conjunction with the drawings and embodiments:

[0019] The general schematic diagram of the standard distributed sample of the present invention tested in the environmental chamber, such as figure 1 As shown in the figure, a standard emission sample composed of VOC liquid 1 is placed in a single-ended equal-diameter long tube 2 and placed in the environmental chamber to be tested 3. The environmental chamber to be tested is equipped with a stirring fan 4 and an inlet 6 A gas chromatograph 7 for sampling connected to the cabin outlet 5 and the cabin outlet 5 is provided with a temperature sampler 8 and a pressure sampler 9.

[0020] For environmental chambers of different volumes, the length and diameter of the equal-diameter long pipe 3 need to be selected and matched. For a vo...

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Abstract

The invention relates to a standard emission sample for detecting the comprehensive performance of an environmental chamber and a detecting method thereof. The invention belongs to the indoor environment detection field; and the sample comprises a unidiameter long tube just with one open end and volatile organic compound liquid which is put into the long tube. The method comprises the following steps that: a model of the emission velocity of the volatile organic compound liquid VOC in the standard emission sample and the influence of the emission velocity on the concentration of the environmental chamber is established; parameters needed for the model are acquired; the standard emission sample is positioned in the environmental chamber to be measured; under a closed state of the environmental chamber, the VOC liquid in the tube is freely diffused; the VOC concentration in the environmental chamber is calculated and obtained by the model; the VOC concentration in an outlet of the environmental chamber is acquired by a gas chromatograph in real time; and the acquired value is compared with the VOC concentration calculated by the model so as to evaluate the comprehensive performance of the environmental chamber. The standard emission sample and the detection method are simple and easy to operate and have high precision and reliability.

Description

technical field [0001] The invention belongs to the field of indoor environment inspection, and in particular relates to a standard emission sample and a detection method thereof for detecting comprehensive properties such as airtightness of an indoor environment cabin, airflow mixing uniformity, wall surface adsorption and the like. Background technique [0002] Indoor air pollution significantly affects people's comfort, health and work efficiency, and has attracted more and more attention. The high concentration of indoor volatile organic compounds (VOC) is one of the main reasons for poor indoor air quality and sick building syndrome. Indoors, the main emission source of VOC is various decoration materials. Therefore, it is necessary to detect the VOC emission of building materials, furniture, household and office appliances and other materials. Various small and large environmental detection chambers have thus been developed. The most important indicators to measure ...

Claims

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Application Information

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IPC IPC(8): G01M3/02G01M19/00G01M99/00
Inventor 张寅平熊建银严伟莫金汉黄少丹
Owner TSINGHUA UNIV
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