Kabushiki Kaisha Saginomiya Seisakusho

Takashi Hirakawa

Yasumasa Takada

Morio Kaneko

Akira Kasai

Hideki Sekiguchi

Takahito Hayashi

Yutaka Kaneko

Tamami Fukuyasu

Masahiro Murata

Kaori Yokota

A first expansion valve is provided in an outdoor unit, and a second expansion valve is provided in an indoor unit. A pipe line connects a first joint pipe of the first expansion valve and a second joint pipe of the second expansion valve. When a refrigerant flows in from the second joint pipe and flows out from the first joint pipe, the first and second expansion valves are in a full open state due to pressure of the refrigerant. When the refrigerant flows in from the first joint pipe and flows out from the second joint pipe, the first and second expansion valves are in semi-closed state (flow rate controlling state). In a cooling mode, the second expansion valve expands the refrigerant just before an indoor heat exchanger, and in a heating mode, the first expansion valve expands the refrigerant just before an outdoor heat exchanger. In both heating and cooling mode, a large amount of refrigerant flows through the pipe line to reduce pressure loss.

Expansion valve, heat pump type refrigeration cycle apparatus, and air handling unit

A bottom wallof a valve chamberof an electric switching valveincludes a laminated structure having a bottom coverto which pipe fittingsare connected; a valve seaton which the valve portsC,D are opened and which an end wall of the valve bodyslidably contacts; an intermediate plateinterposed between the bottom coverand the valve seatwith communication openingsD,E for connecting the pipe fittingsto the valve portsC,D. At least one of the valve portsC,D is biased toward a rotation center of the valve bodyagainst the center of the corresponding pipe fitting

Electrically operated switch-over valve

Growing community of inventors

Sayama, Japan

Takashi Hirakawa