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Residual sample gas cleaning device of electrochemical gas sensor and gas detecting device using same

A gas sensor and removal device technology, applied in the direction of material electrochemical variables, measuring devices, scientific instruments, etc., can solve problems affecting measurement accuracy, etc., and achieve the effect of simple structure and compact appearance

Inactive Publication Date: 2010-03-03
丁五行
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, in order to overcome the problem that the residual sample gas in the gas exchange chamber of the current electrochemical gas sensor affects the measurement accuracy, the utility model provides a residual sample gas removal device for the electrochemical gas sensor, which can be installed on the existing electrochemical gas sensor In the sample gas path of the sensor, discharge the sample gas from the gas path and the gas chamber, clean the gas collection system, ensure that there is no adsorbed gas in the gas path, and no residual sample gas in the gas chamber, so as to maximize the measurement accuracy of the electrochemical sensor and relatively prolong the service life life

Method used

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  • Residual sample gas cleaning device of electrochemical gas sensor and gas detecting device using same
  • Residual sample gas cleaning device of electrochemical gas sensor and gas detecting device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A residual sample gas removal device for an electrochemical gas sensor, consisting of a filter 3, a miniature vacuum pump 4, a buffer gas chamber 5, a gas circuit base 2 and a solenoid valve 1, the miniature vacuum pump 4 and the solenoid valve 1 are installed on the gas On the subgrade body 2. The solenoid valve is a normally closed solenoid valve. After each measurement of the electrochemical gas sensor, the solenoid valve is opened, the micro vacuum pump operates, the air enters the micro vacuum pump 4 through the filter 3, and the air pumped out by the micro vacuum pump 4 enters the buffer air chamber 5. The outlet end of the buffer air chamber 5 is provided with a pressure reducing valve, and the air in the buffer air chamber forms compressed air with a certain pressure. The air flowing out from the buffer gas chamber 5 enters the sample gas path of the electrochemical gas sensor through the solenoid valve 1 to form a pressure difference between the inside of the g...

Embodiment 2

[0033] A residual sample gas removal device for an electrochemical gas sensor, consisting of a filter 3, a micro vacuum pump 4, a buffer gas chamber 5, a gas circuit base 2, a polymer membrane air dryer 6 and a solenoid valve 1, the micro vacuum pump 4 And the solenoid valve 1 is installed on the air circuit substrate 2 . The solenoid valve is a normally closed solenoid valve. After each measurement of the electrochemical gas sensor, the solenoid valve is opened, the micro vacuum pump operates, the air enters the micro vacuum pump 4 through the filter 3, and the air pumped out by the micro vacuum pump 4 enters the buffer air chamber 5. The outlet end of the buffer air chamber 5 is provided with a pressure reducing valve, and the air in the buffer air chamber forms compressed air with a certain pressure. The air flowing out from the buffer air chamber 5 passes through the polymer membrane air dryer 6, and then enters the sample gas path of the electrochemical gas sensor through...

Embodiment 3

[0035] It is basically the same as Embodiment 1, except that the air path base body and the buffer air chamber form a whole.

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PUM

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Abstract

The invention provides a residual sample gas cleaning device of an electrochemical gas sensor, which comprises a filter, a mini-pump, a buffering air chamber and an electromagnetic valve, wherein after being filtered by the filter, the air is pumped into the buffering air chamber by the mini-pump and then enters a sample gas circuit a detecting device of the electrochemical gas sensor through theelectromagnetic valve. As the normally closed electromagnetic valve is arranged inside the sample gas circuit of the electrochemical gas sensor to control the conductive residual sample gas cleaning device, the clean air is pumped into the sample gas circuit by the mini-pump after the measurement at every time, the sample gas in the gas circuit and the air chamber can be successfully discharged after the measurement, no absorbed gas is not available in the gas circuit, no residual sample gas is not available in the air chamber, the measuring accuracy of the electrochemical gas sensor can be improved to the utmost extent, and the service life thereof is comparatively prolonged. The invention also provides an electrochemical gas sensor gas detecting device of the residual sample gas cleaningdevice.

Description

technical field [0001] The invention relates to an auxiliary device for an electrochemical gas sensor, in particular to a residual sample gas removal device for an electrochemical gas sensor and gas detection equipment using the device. Background technique [0002] The earliest electrochemical sensors date back to the 1950s, when they were used for oxygen monitoring. By the mid-1980s, small electrochemical sensors were used to detect many different toxic gases in the PEL range and showed good sensitivity and selectivity. Currently, various electrochemical sensors are widely used in many static and mobile applications for personal safety. [0003] Electrochemical sensors work by reacting with a target gas and producing an electrical signal proportional to the gas concentration. A typical electrochemical sensor consists of a sensing electrode (or working electrode) and a counter electrode separated by a thin electrolytic layer. The gas first reacts with the sensor through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/407
Inventor 丁五行李群李宝明
Owner 丁五行
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