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Title:
AIR CONDITIONING MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/010294
Kind Code:
A1
Abstract:
Provided is an air conditioning machine capable of inhibiting a refrigerant, which is recovered in an outdoor heat exchanger after a pump-down operation has ended, from counter-flowing in a refrigerant circuit from a discharge hole of a compressor toward an indoor heat exchanger side. This air conditioning machine is provided with: a refrigerant circuit 100; a refrigerant leakage sensing unit 95 that senses leakage of a flammable refrigerant from the refrigerant circuit 100; and a pump-down operation control unit 931 that performs a pump-down operation for storing the flammable refrigerant in an outdoor heat exchanger 103 in the refrigerant circuit 100 when the refrigerant leakage sensing unit 95 senses leakage of the flammable refrigerant. A compressor 101 has a cylinder chamber, a compression member that compresses the flammable refrigerant disposed in the cylinder chamber, and a discharge hole for discharging the flammable refrigerant compressed inside the cylinder chamber. When the pump-down operation ends, the pump-down operation control unit 931 controls the compressor 101 such that the compression member is stopped at a position at least partially overlapping the discharge hole when viewed in the axial direction of the cylinder chamber.

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Inventors:
TAKAGI MOTOKI
Application Number:
JP2016069351W
Publication Date:
January 19, 2017
Filing Date:
June 29, 2016
Export Citation:
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Assignee:
DAIKIN INDUSTRIES, LTD.
International Classes:
F25B49/02; F25B1/00; F25B1/04
Foreign References:
JP2002228281A2002-08-14
JP2013213469A2013-10-17
JP2004215331A2004-07-29
JPH09264641A1997-10-07
JP2000171130A2000-06-23
JP2001174108A2001-06-29
Other References:
See also references of EP 3324138A4
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower, 8-1, Kakuda-cho, Kita-ku, Osaka-shi, Osaka, JP)
Mutsumi Sameshima (8-1, Kakuda-cho, Kita-ku, Osaka-shi, Osaka, 5300017 Umeda Hankyu ビルオフィス tower Aoyama patent firm Osaka, JP)
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