Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate
2006-01-31
2006-01-31
Norman, Marc (Department: 3744)
Refrigeration
Automatic control
Refrigeration producer
C062S133000, C062S228400
Reexamination Certificate
active
06990823
ABSTRACT:
An air conditioner accurately performs detection of a refrigerant circulation amount and improves a basic function including an accuracy and a response characteristic of a control for achieving stable maintenance of a room temperature. An electronic control system includes a controller performing an air-conditioning control so that flow detected information from a hot-wire flow sensor, refrigerant operation state information from a refrigerant operation state sensor, and temperature information from a resistance value sensor are added in external information detection means. Detection of the refrigerant circulation amount can be carried out more accurately and properly, a pressure control of a crank chamber pressure Pc is properly carried out through a gas feed passage by a control valve of a variable displacement compressor, the control valve being controllably driven by the controller through a drive circuit, and the basic function including an engine load control and an air-conditioning control is remarkably improved.
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Baker & Botts L.L.P.
Norman Marc
Sanden Corporation
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