FOUR-WAY MAIN VALVE, FOUR-WAY REVERSING VALVE ASSEMBLY, AND AIR CONDITIONING UNIT

WIPO Patent Application WO/2022/042101

A1

Provided are a four-way main valve (100), a four-way reversing valve assembly (10), and an air conditioning unit; the four-way main valve (100) comprises a cylinder body (110) and a reversing piston (120); a first air chamber (102) and a second air chamber (104) in the cylinder body (110) are in communication with an air inlet duct (111) by means of a ventilation groove (112) at the same end of the cylinder body (110); when reversing, the reversing piston (120) must be pushed to the other side. Since the first air chamber (102) and the second air chamber (104) are both in communication with the corresponding air inlet duct (111) by means of the ventilation groove (112) on the inner wall of the cylinder body (110); therefore, when performing a reversal operation, the high-pressure air in a pilot valve (200) can pass through the corresponding air inlet duct (111) and ventilation groove (112) and directly enter the first air chamber (102) or the second air chamber (104), thereby pushing the reversing piston (120) to move. The high-pressure gas in the pilot valve (200) does not need to be transferred by means of the flow channel in the middle of the reversing piston (120), and the reversing piston (120) does not need to be additionally provided with a flow channel and a flow-channel switching mechanism.

HAN RUNHU (CN)
JIN HUAHAI (CN)

PCT/CN2021/106127

March 03, 2022

July 13, 2021

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ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)

F16K27/04; F16K11/07; F16K27/08; F25B41/20

CN102162543A	2011-08-24
CN202629168U	2012-12-26
CN102242814A	2011-11-16
CN102226482A	2011-10-26
CN103089727A	2013-05-08
JP2004245427A	2004-09-02

KANGXIN PARTNERS, P.C. (CN)

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