Heat exchange – With vehicle feature – Heating and cooling
Patent
1980-08-11
1983-05-24
Scott, Samuel
Heat exchange
With vehicle feature
Heating and cooling
165 29, 62243, 623246, 13762543, B60H 304, F25B 1300
Patent
active
043846084
ABSTRACT:
A compression air conditioning system adapted to cool air within the passenger compartment of a motor vehicle can be reversed to function as a heat pump for heating the compartment. The system includes a first heat exchanger located within the compartment wherein the refrigerant is vaporized in the air conditioning mode and condensed during the heating mode. An electrical resistance heater is energized for a short period after starting the engine during which time the various heat sources may be inadequate to heat the passenger compartment air sufficiently. A diverter valve regulates flow through the refrigerant lines so that flow in either the heating or cooling mode is always in the same direction through the lines and the system components. A second heat exchanger located outside the compartment operates as a condenser during the cooling cycle and as an evaporator during the heating cycle. Three sources of heat energy can be used within the second exchanger to heat the refrigerant. The engine exhaust gas and primary engine coolant can be used to heat ambient air, which is carried to the second exchanger to heat the refrigerant when outside temperatures are so low that the refrigerant is not adequately heated from the atmosphere.
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Akerman Joseph R.
Scarlett John A.
Focarino Margaret A.
Ford Motor Company
Harrington D. J.
McKenzie Frank G.
Scott Samuel
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