Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2019/181316
Kind Code:
A1
Abstract:
An air conditioner (1) comprising: an outdoor unit (2); a plurality of indoor units (5a–5d); a plurality of on/off valves (6a–6d) provided on the upstream side of the respective indoor heat exchangers (51a–51d) of the indoor units; a plurality of expansion valves (24a–24d) provided on the downstream side of the indoor heat exchangers; and a control means (200, 500a) for selectively controlling the components of the air conditioner. When a second indoor unit (5b) is operating, the control means stops a first indoor unit (5a) that has received a stop instruction by a procedure in which: a first indoor fan (55a) is stopped; the degree of opening of a first outdoor expansion valve (24a) is increased while a first on/off valve (6a) remains open, and a low-density, high-pressure gas-phase refrigerant is circulated in a first indoor heat exchanger (51a) and a first liquid pipe (8a); the first on/off valve (6a) is closed and the high-pressure gas-phase refrigerant is changed to a lower-density, low-pressure gas-phase refrigerant; and the first outdoor expansion valve (24a) is closed, and reverse flow of a low-pressure liquid-phase refrigerant is prevented.
Inventors:
TAKAOKA RYO (JP)
SANADA SHINTARO (JP)
HIROSAKI YU (JP)
SEKINE NARUHIRO (JP)
AOKI KOYA (JP)
YAMAZAKI TATSURO (JP)
SANADA SHINTARO (JP)
HIROSAKI YU (JP)
SEKINE NARUHIRO (JP)
AOKI KOYA (JP)
YAMAZAKI TATSURO (JP)
Application Number:
PCT/JP2019/005707
Publication Date:
September 26, 2019
Filing Date:
February 15, 2019
Export Citation:
Assignee:
FUJITSU GENERAL LTD (JP)
International Classes:
F25B6/02; F24F11/86; F25B1/00; F25B13/00
Foreign References:
| JPS63169451A | 1988-07-13 | |||
| JPH04208364A | 1992-07-30 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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