Daikin Industries, Ltd.

Youichi Ohnuma

Shigeharu Taira

Masaru Tanaka

Tomoyuki Haikawa

Tomoatsu Minamida

Hideki Matsuura

Kouji Shibaike

Hideki Hara

Masahito Yoshizawa

When a fully-closable expansion valve is used, there is a possibility that the expansion valve is fully closed thereby to block a refrigerant circuit. In an air conditionerof the present invention, an indoor heat exchangerincludes an auxiliary heat exchangerand a main heat exchangerdisposed leeward from the auxiliary heat exchanger. In an operation in a predetermined dehumidification operation mode, a liquid refrigerant supplied to the auxiliary heat exchangerall evaporates midway in the auxiliary heat exchanger, i.e., before reaching the outlet. Therefore, only an upstream partial area in the auxiliary heat exchangeris an evaporation region, while an area downstream of the evaporation region in the auxiliary heat exchangeris a superheat region. Further, an evaporation temperature sensorwhich detects an evaporation temperature is disposed downstream of an expansion valvein an outdoor unit

Air conditioner

An air conditioner employing a flammable refrigerant, comprises a sensor ( ) that is provided on an external surface of an indoor unit ( ) and detects the flammable refrigerant gas, in order to prevent the accident of a fire or the like even when the flammable refrigerant leaks. Furthermore, an air conditioner is provided with a indoor unit housing a heat exchanger ( ) and a fan ( ) inside its casing ( ) that has an inlet port ( ) and an outlet port ( ). The air conditioner rotates the fan ( ) and flows the flammable refrigerant through the heat exchanger ( ) during operation, performing heat exchange between air taken into the casing ( ) through the inlet port ( ) and the flammable refrigerant, and blows out the air that has undergone the heat exchange to the inside of a room through the outlet port ( ). The air conditioner comprises a sensor ( ) that is provided on an external surface of the casing ( ) and detects a flammable refrigerant gas and a control section ( ) for executing control to rotate the fan ( ) when the sensor ( ) detects the flammable refrigerant gas.

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Kusatsu, Japan

Youichi Ohnuma