FRESH-AIR AIR CONDITIONING SYSTEM AND CONTROL METHOD - SHANGHAI HIGHLY ELECTRICAL APPLIANCES CO LTD

Title:

FRESH-AIR AIR CONDITIONING SYSTEM AND CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2019/061914

Kind Code:

A1

Abstract:

A fresh-air air conditioning system and control method, the system comprising an interior unit (1) and an exterior unit (2). The interior unit (1) comprises a first interior heat exchanger (11) and a second interior heat exchanger (13). The exterior unit (2) comprises a compressor (21), intake bypass circuit, first accumulator (22) and second accumulator (23). The intake bypass circuit comprises a first electromagnetic valve (24), second electromagnetic valve (25), and third electromagnetic valve (26). A first end of the first electromagnetic valve (24) is connected to a first end of the first interior heat exchanger (11), and a second end of the first electromagnetic valve (24) is connected via the first accumulator (22) to a first intake end of the compressor (21) and a first end of the third electromagnetic valve (26). The second end of the third electromagnetic valve (26) is connected via the second accumulator (23) to a second intake end of the compressor (21) and a first end of the second electromagnetic valve (25). The second end of the second electromagnetic valve (25) is connected to a first end of the second interior heat exchanger (13). When one of the first interior heat exchanger (11) or second interior heat exchanger (13) is closed, the third electromagnetic valve (26) opens so that the first accumulator (22) and second accumulator (23) simultaneously communicate with the open interior heat exchanger, avoiding poor oil return as a result of prolonged single-cylinder operation of the compressor, and ensuring the reliability of the compressor as well as interior comfort.

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Inventors:

ZHANG LEI (CN)
LIU CHUNHUI (CN)

Application Number:

PCT/CN2017/119350

Publication Date:

April 04, 2019

Filing Date:

December 28, 2017

Export Citation:

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Assignee:

SHANGHAI HIGHLY ELECTRICAL APPLIANCES CO LTD (CN)

International Classes:

F24F11/00; F25B41/20; F25B41/34; F25B49/02

Foreign References:

CN105115181A	2015-12-02
CN103851840A	2014-06-11
CN206160545U	2017-05-10
CN104676796A	2015-06-03
CN206094634U	2017-04-12
CN106642306A	2017-05-10
CN205980121U	2017-02-22
US5878810A	1999-03-09
JP2013124792A	2013-06-24

Attorney, Agent or Firm:

SHANGHAI SAVVY INTELLECTUAL PROPERTY AGENCY (CN)

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