Tgk Co., Inc.

Ryouta Sugamura

Takeshi Kaneko

Shinji Saeki

Masaaki Tonegawa

Takanao Kumakura

Toshiyuki Shiota

Akihiko Yamamoto

Hidekazu Sakakibara

A first expansion valve is provided in a first refrigerant circulation passage through which the refrigerant discharged from a compressor is able to circulate by passing sequentially through an external heat exchanger and an evaporator and returning to the compressor. A second expansion valve is provided in a second refrigerant circulation passage through which the refrigerant discharged from the compressor is able to circulate by passing sequentially through an auxiliary condenser and the external heat exchanger and returning to the compressor. The second expansion valve regulates the valve opening degree such that the refrigerant state at an inlet side of the compressor during a heating operation is in a range where the dryness of refrigerant is greater than or equal to 0.9 and the superheat of refrigerant is less than or equal to 5&#xb0; C.

Automotive air conditioner and expansion valve

Growing community of inventors

Tokyo, Japan

Ryouta Sugamura