Patent ID: 7861545

Claim:
An air conditioning system, comprising: a closed refrigerant fluid path including a low pressure side and a high pressure side; a compressor disposed in the fluid path between the low pressure side and the high pressure side; a clutch disposed between the compressor and a drive, the clutch being engageable by application of an electrical voltage thereto for connecting the drive in driving relation to the compressor; and a cut-out circuit including a device electrically connected to a voltage source for receiving a voltage therefrom, the device being connected to the clutch through a conductive path and a low pressure switch located within the path, the device being configured and operable for outputting a voltage to the low pressure switch for engaging the clutch for driving the compressor, the low pressure switch being connected to the low pressure side of the fluid path so as to be exposed to a pressure therein and being automatically operable for interrupting the voltage flow to the clutch when the pressure is less than a predetermined minimum pressure, and for reinstating the voltage flow when the pressure returns to at least the minimum pressure, and the cut-out circuit including a high pressure switch connected to the high pressure side of the fluid path so as to be exposed to a pressure therein, the high pressure switch being connected between a voltage source and to the device and operable in cooperation with the device to interrupt a voltage flow to the low pressure switch when the pressure in the high pressure side of the fluid path is above a predetermined maximum value and to continue to interrupt the voltage flow until a voltage received by the device is interrupted and resumed.