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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 (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
SANADA, Shintaro (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
HIROSAKI, Yu (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
SEKINE, Naruhiro (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
AOKI, Koya (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
YAMAZAKI, Tatsuro (3-3-17 Suenaga, Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
Application Number:
JP2019/005707
Publication Date:
September 26, 2019
Filing Date:
February 15, 2019
Export Citation:
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Assignee:
FUJITSU GENERAL LIMITED (3-3-17, Suenaga Takatsu-ku, Kawasaki-sh, Kanagawa 02, 〒2138502, JP)
International Classes:
F25B6/02; F24F11/86; F25B1/00; F25B13/00
Foreign References:
JPS63169451A1988-07-13
JPH04208364A1992-07-30
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (Toranomon Mitsui Building, 8-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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