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Air detection device, air sampling device and air sampling method

A technology of air sampling and sampling unit, which is applied in the direction of measuring devices, sampling devices, instruments, etc., and can solve the problems of high cost, single detection, and large volume of sampling devices

Inactive Publication Date: 2015-06-10
SHENZHEN CHK
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing air sampling devices usually can only achieve a single detection, such as only particulate matter detection, or VOC (volatile organic compound) detection
Moreover, the air is sampled by pumps or fans to generate gas flow, which leads to large volume and high cost of the sampling device

Method used

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  • Air detection device, air sampling device and air sampling method
  • Air detection device, air sampling device and air sampling method
  • Air detection device, air sampling device and air sampling method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] Such as Figure 1 to 3 As shown, the air sampling device includes a housing 1. The housing 1 is composed of a front housing 1a and a bottom housing 1b. The top of the housing 1 is provided with a first air hole 11, and the bottom of the housing 1 is provided with a second air hole 12, and the housing 1 A VOC sensor 2 and a particle sampling unit 3 are arranged inside.

[0017] VOC sensor 2 can use various commercially available VOC sensors, such as the TGS2442 sensor from Japan FIGARO. These VOC sensors are composed of a sensor chip composed of a semiconductor layer and a heating element integrated with it. During detection, the sensor needs to be heated by the heating element to reach the corresponding temperature. The conductivity changes with the change of the VOC gas concentration. Features to achieve the detection of VOC concentration.

[0018] The particle ...

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Abstract

The invention relates to an air detection device, an air sampling device and an air sampling method. The air sampling device comprises a housing, the top and the bottom of the housing are respectively provided with pores, a VOC sensor and a particle sampling unit are arranged in the housing and the VOC sensor is provided with a heating unit. The air detection device comprises the air sampling device and a signal processing device for computing a corresponding detection result according to the sampling result. The air sampling method is realized based on the air sampling device and comprises applying heating voltage for the VOC sensor so that the VOC sensor has a detection temperature, heating the VOC sensor and simultaneously carrying out thermal convection of air currents so that air enters into the housing by the pores and is respectively collected by the VOC sensor and the particle sampling unit. The air sampling device has a small volume and a low cost and realizes sampling of air particles and VOC.

Description

Technical field [0001] The invention relates to an air sampling device and method for detecting ambient air, and an air detection device adopting the air sampling device. Background technique [0002] Existing air sampling devices usually can only achieve a single detection, such as particulate detection or VOC (volatile organic compound) detection. Moreover, the air sampling is generated by a pump or a fan to generate gas flow, which results in a large volume and high cost of the sampling device. Summary of the invention [0003] The purpose of the present invention is to provide a miniaturized, low-cost air sampling device and method. [0004] An air sampling device provided by the present invention includes a housing, the top and bottom of the housing are respectively provided with air holes, a VOC sensor and a particulate matter sampling unit are arranged in the housing, and the VOC sensor has a heating element. [0005] In the above-mentioned air sampling device, preferably...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N33/00
Inventor 丘守庆许申生李鹏程高明何家明
Owner SHENZHEN CHK
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