NOISE REDUCTION DEVICE, ELECTRONIC EXPANSION VALVE, NOISE REDUCTION METHOD, AND ELECTRONIC EXPANSION VALVE ASSEMBLY

Title:

NOISE REDUCTION DEVICE, ELECTRONIC EXPANSION VALVE, NOISE REDUCTION METHOD, AND ELECTRONIC EXPANSION VALVE ASSEMBLY

Document Type and Number:

WIPO Patent Application WO/2023/241144

Kind Code:

A1

Abstract:

Provided in the present disclosure are a noise reduction device, an electronic expansion valve, an assembly, and a noise reduction method. The noise reduction device comprises an outer sleeve, an inner sleeve, and a connecting portion. The outer sleeve is provided with an outer sleeve inner wall, the inner sleeve is provided with an inner sleeve inner wall and an inner sleeve outer wall, a main flow channel is formed in the inner sleeve inner wall, and the main flow channel is provided with a main flow inlet and a main flow outlet in a fluid flow direction, and the connecting portion connects the outer sleeve inner wall to the inner sleeve outer wall. The connecting portion, the inner sleeve outer wall and the outer sleeve inner wall form a flow guide channel, the flow guide channel is provided with a flow guide inlet and a flow guide outlet in the fluid flow direction, the flow guide inlet is used for guiding part of a fluid flowing from the main flow outlet to flow into the flow guide channel, and the flow guide outlet is used for guiding the fluid in the flow guide channel to flow to the main flow inlet. By means of the above structure, the present disclosure can prevent bubble retention caused by flow dead zones being formed at corners around the main flow outlet, and can reduce bubble breakage, thereby achieving the aim of noise reduction.

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WO/2022/057421	ELECTRONIC EXPANSION VALVE, REFRIGERANT CIRCULATION PIPELINE, AND AIR CONDITIONER SYSTEM
JP2593802	[Name of invention] Pilot poppet type pressure control valve

Inventors:

YUAN YADONG (CN)
ZHAO XIAOFEI (CN)
CHEN QIGONG (CN)
ZHANG KEPENG (CN)

Application Number:

PCT/CN2023/081989

Publication Date:

December 21, 2023

Filing Date:

March 16, 2023

Export Citation:

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Assignee:

ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD (CN)

International Classes:

F16K47/02; F25B41/35

Foreign References:

CN218178079U	2022-12-30
CN201121713Y	2008-09-24
CN112648390A	2021-04-13
CN207454856U	2018-06-05
CN113389941A	2021-09-14
JP2007016958A	2007-01-25
EP3499152A1	2019-06-19

Attorney, Agent or Firm:

BEIJING INTELLEGAL INTELLECTUAL PROPERTY AGENT LTD. (CN)

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