Refrigerating cycle
This patent describes a refrigerating system comprising: a condenser and an evaporator connected in series with each other; throttle means provided in the series connection between the condenser and the evaporator; a rotary compressor having a delivery port and a suction port, the delivery port being connected to the condenser by means of delivery tube. The suction port is connected to the evaporator by means of a suction tube; a check valve provided in the suction tube; differential pressure valve provided between the throttle means and the condenser in the series connection. The differential pressure valve has an elongated space therein including a valve section and a control section, the control section being divided by a diaphragm into first and second chambers; a first pressure introducing tube communicating the first chamber with the suction tube on the compressor side of the check valve; and a second pressure introducing tube communicating the second chamber with the suction tube on the evaporator side of the check valve; the differential pressure valve including valve means provided within the valve section thereof, the valve section being formed with a primary port communicating with the condenser and a secondary port communicating with the evaporator via the throttle means. The valve means is adapted to open or block communication between the primary port and the secondary port; actuator means connecting the diaphragm and the valve means and normally urged to maintain the valve means at an open position; and seal means for providing seal between the control section and the valve section.
- Assignee:
- Kabushiki Kaisha Saginomiya Seisakusho, Tokyo
- Patent Number(s):
- US 4622829
- OSTI ID:
- 6971196
- Resource Relation:
- Patent File Date: Filed date 9 Dec 1985
- Country of Publication:
- United States
- Language:
- English
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