Kabushiki Kaisha Saginomiya Seisakusho

Nippondenso Co., Ltd.

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Tadaaki Ikeda

Tomoo Okada

Masahiro Kawaguchi

Ken Suitou

Masanori Sonobe

Hisayoshi Sakakibara

Hiroyuki Nagai

Yasumasa Takada

Ichiro Ohkawara

Masakazu Kitamura

A ball valve and a valve shaft are in a valve chamber. The ball valve opens and closes a valve port. A coil spring arranged in a spring chamber pushes the valve shaft against a diaphragm via a spring bracket of the valve shaft. A cone portion and a flat portion (or a concave portion) inside the cone portion are on the diaphragm. A diaphragm-side end face of the valve shaft is larger in diameter than the flat portion of the diaphragm. When the diaphragm is initially deformed, a boundary portion interposed between the cone portion and the flat portion abuts on the diaphragm-side end face.

Pressure-operated control valve

An electromagnetic control valve is provided. The control stability of the electromagnetic control valve is improved because: (1) one end of the guide pin is forced into and then secured in a hole formed in the center of the coil guide so that the plunger moves in the center of the suction portion; (2) one end of the connecting rod is forced into and then secured in a hole formed in the center of the plunger, and a guide portion for guiding the connecting rod is provided in the center of the upper main body; or (3) the connecting rod is forced into and then secured in a hole formed in the center of the plunger, and a first guide portion for guiding the connecting rod is provided at the lower end of the coil guide and/or a second guide portion for guiding the connecting rod is provided at the lower end of the upper main body.

Electromagnetic control valve

This invention provides an expansion valve combined with a solenoid valve which prevents a water hammer phenomenon from occurring when a refrigerant passage is opened and closed by the solenoid valve. Refrigerant passages (P1, P2) are formed in a valve body (1) between a primary port (1a) and a secondary port (1b). The solenoid valve (V) attached to the valve body (1) opens and closes the refrigerant passages (P1, P2) in their intermediate portion. An expansion valve disk (6)--which is moved by the action of a diaphragm (8) that defines an outer pressure chamber (R2) communicating to a temperature sensing cylinder (E) and an inner pressure chamber (R1)--is brought into and out of engagement with a valve seat (S1) formed on the primary port (1a) side of the refrigerant passage (P1). The secondary port (1b) side and the inner pressure chamber (R1) are communicated via an inner pressure equalizing hole (15) formed in the valve body (1).

Expansion valve combined with a solenoid valve

A pressure differential valve connected to a refrigerating circuit piping which, when a refrigerating cycle stops, blocks the high pressure coolant from diffusing into the low pressure section. Said pressure differential valve comprises a valve body having a first inlet, a first outlet, a second inlet and a second outlet; a valve disk installed in a valve chamber between the first inlet and the first outlet to open or close the passage between the first inlet and outlet, the valve disk being urged to open by a spring; a diaphragm installed between the second inlet and the second outlet to form pressure chambers; and a check valve secured to the diaphragm and communicating to both of the pressure chambers; whereby when the check valve is closed, the diaphragm causes, through a connecting rod, the valve disk to close. Said valve disk has radially projecting guide vanes attached to the axially extending portion of the seat-contacting disk to form spaces through which coolant can flow.

Differential pressure valve

Growing community of inventors

Sayama, Japan

Tadaaki Ikeda