Air conditioning apparatus
OwnerClaude W. Dawkinsinventor
Life of this patent
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Abstract
A refrigeration type air conditioning apparatus employing a heat transfer medium for use in a vehicle having a large passenger area, comprising a vehicle engine driven compressor and a pair of electric motor driven compressors, all of which are connected to a pair of condenser coils via a discharge manifold and to a split evaporator coil via a suction manifold while each of the condenser coils is connected to one half of the evaporator coil via an expansion valve.
Claims7
An air conditioning apparatus employing a heat transfer medium for use in a vehicle having a large passenger area and equipped with an engine and a source of DC voltage, the apparatus comprising:
- a first compressor having a suction port and a discharge port;
- clutch means for drivingly connecting the first compressor to the engine of the vehicle;
- a second compressor having a suction port and a discharge port;
- a first electric motor drivingly connected to the second compressor;
- a third compressor having a suction port and a discharge port;
- a second electric motor drivingly connected to the third compressor;
- a first condenser coil having an inlet port and an outlet port;
- a second condenser coil having an inlet port and and outlet port;
- discharge manifold means interconnecting the discharge ports of each of the first, second and third compressors and the inlet ports of each of the first and the second condenser coils, for conducting heat transfer medium from the first, second and third compressors to the first and second condenser coils;
- an evaporator coil having a first inlet port providing access to a first half of the evaporator coil, a second inlet port providing access to a second half of the evaporator coil, and an outlet port providing an exhaust path from each of the first and second halves of the evaporator coil;
- a first expansion valve connected to the first inlet port of the evaporator coil;
- a first liquid conduit interconnecting the outlet port of the first condenser coil and the first expansion valve;
- a second expansion valve connected to the second inlet port of the evaporator coil;
- a second liquid conduit interconnecting the outlet port of the second condenser coil and the second expansion valve;
- suction manifold means interconnecting the outlet port of the evaporator coil and the suction ports of each of the first, second and third compressors, for conducting heat transfer medium from the evaporator coil to the first, second and third compressors;
- air circulating means having an interior portion connected to the passenger area for moving air from the passenger area over the evaporator coil for return to the passenger area, and an exterior portion for moving air from outside the vehicle over the first and second condenser coils;
- and
- electrical circuit means comprising:
- first compressor control circuit means connected to the source of DC voltage and to the clutch means, for connecting the DC voltage to the clutch means in a first position of the electrical circuit means;
- second compressor control circuit means connected to a source of AC voltage and to the first electric motor, for connecting the AC voltage to the first electric motor in at least a second position of the electrical circuit means;
- and
- third compressor control circuit means connected to the source of AC voltage and to the second electric motor, for connecting the AC voltage to the second electric motor in a third position of the electrical circuit means.
Dependencies are inferred from the claim text.