AIR CONDITIONER

WIPO Patent Application WO/2006/112321

A1

An air conditioner in which generation of refrigerant sound can be suppressed in small capacity control. The air conditioner (100) comprises a refrigerant circuit including a compressor (10), an outdoor heat exchanger (14), a first indoor expansion valve (5a) and a first indoor heat exchanger (3a), and is further provided with a gas vent circuit (20), a gas vent circuit (20) open/close section, and a control section. The gas vent circuit (20) is a circuit for bypassing the refrigerant circuit and returning the refrigerant to the suction side of the compressor (10). The gas vent circuit open/close section (30) is provided above the gas vent circuit (20) and opens/closes the gas vent circuit (20). The control section (60) performs capacity control through frequency control of the compressor (10), and if further reduction in capacity is required after the frequency of the compressor (10) is lowered until a lowest operation frequency is reached, the gas vent circuit open/close section (30) is opened and capacity control is carried out in small capacity control mode where the capacity is regulated through frequency control of the compressor (10) with the gas vent circuit open/close section (30) kept open.

SANGENYA HIDEKI (JP)
KATAOKA HIDEHIKO (JP)

PCT/JP2006/307735

October 26, 2006

April 12, 2006

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DAIKIN IND LTD (JP)
SANGENYA HIDEKI (JP)
KATAOKA HIDEHIKO (JP)

F25B1/00; F24F11/02; F25B13/00

JPH02154945A	1990-06-14
JPS6424186A	1989-01-26
JP2003269808A	2003-09-25

Ono, Yukio (South Forest Bldg. 1-4-19, Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, JP)

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