Airtight chamber and method for balancing air pressure inside airtight chamber

A closed chamber and gas technology, applied in the direction of sampling devices, etc., can solve the problems of incomplete vacuuming, poor sealing performance, poor corrosion resistance, etc., and achieve the effects of good air tightness, accurate test data and good test reproducibility

Inactive Publication Date: 2016-07-20
CHINA TIANBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above problems, the object of the present invention is to provide a gas collection bag, which can effectively

Method used

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  • Airtight chamber and method for balancing air pressure inside airtight chamber
  • Airtight chamber and method for balancing air pressure inside airtight chamber
  • Airtight chamber and method for balancing air pressure inside airtight chamber

Examples

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Example Embodiment

[0018] Example 1

[0019] Such as figure 1 As shown, a closed chamber with balanced air pressure includes a vacuum pump 1, a gas collection bag a2, a gas collection bag b3, a three-way pneumatic rotary valve a4, and a three-way pneumatic rotary valve b5. The gas collection bag a2 is arranged in the closed chamber 6. Externally, the air inlet and outlet of the gas collection bag a2 are connected to the port a41 of the three-way pneumatic rotary valve a4, the port b42 of the three-way pneumatic rotary valve a4 is directly connected to the inside of the closed chamber 6, and the air outlet of the three-way pneumatic rotary valve a4 c43 is connected to the vacuum pump 1; the gas collection bag b3 is set on the suspended ceiling in the closed chamber 6, and the gas inlet and outlet ports of the gas collection bag b3 are connected to the port d51 of the three-way pneumatic rotary valve b5. The port e52 of the rotary valve b5 is directly connected to the atmosphere outside the closed c...

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Abstract

The invention discloses an airtight chamber and a method for balancing air pressure inside the airtight chamber.An air collecting bag a is arranged outside an airtight chamber box body, an air inlet-outlet of the air collecting bag a is connected with a port a of a three-way pneumatic rotary valve a, a port b of the three-way pneumatic rotary valve a is directly led to the inside of the airtight chamber box body, and an air outlet c of the three-way pneumatic rotary valve a is connected with a vacuum pump.A air collecting bag b is arranged on a ceiling inside the airtight chamber box body, an air inlet-outlet of the air collecting bag b is connected with a port d of a three-way pneumatic rotary valve b, a port e of the three-way pneumatic rotary valve b is directly led to the atmospheric environment outside the airtight chamber box body, and an air outlet f of the three-way pneumatic rotary valve b is connected with the vacuum pump.The air collecting bags are attached with supports, vacuum pumping is clean and thorough, the requirement is rapidly met, air tightness is good, no leakage or chemical reaction is produced, test data is accurate, and test reproducibility is good.

Description

technical field [0001] The invention relates to an airtight chamber and an air pressure balancing method in the airtight chamber. Background technique [0002] The closed chamber method is a method commonly used in the world for the determination of motorcycle fuel evaporative emissions. During the experiment, the change of ambient temperature in the airtight chamber will cause the pressure in the airtight chamber to fluctuate, and the pressure change in the airtight chamber will affect the fuel evaporation rate, thereby affecting the accuracy and repeatability of the test. Therefore, a flexible expansion container should be installed on the airtight chamber to balance the pressure change caused by the small change in temperature. At the same time, since the main components of fuel oil are hydrocarbons, sulfides, etc., the selected flexible expansion container must not penetrate and volatilize these substances, nor can it react with these substances. [0003] In addition, ...

Claims

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Application Information

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IPC IPC(8): G01N1/24
Inventor 朱棣洪彬陶俊卫张健胡明张坤良王嘉钧郑义
Owner CHINA TIANBO
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