Method for defrosting an external heat exchanger, which is operated as an air heat pump, of a cooling system for a motor vehicle, cooling system, and motor vehicle having such a cooling system
A method for defrosting an external heat exchanger, operated as an air heat pump evaporator, of a cooling system for a motor vehicle. The cooling system includes a refrigerant compressor connected to a primary and secondary section; an external heat exchanger; an evaporator; a heating register; a pr...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
21.11.2023
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Subjects | |
Online Access | Get full text |
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Summary: | A method for defrosting an external heat exchanger, operated as an air heat pump evaporator, of a cooling system for a motor vehicle. The cooling system includes a refrigerant compressor connected to a primary and secondary section; an external heat exchanger; an evaporator; a heating register; a primary section valve which is closed in the air heat pump operation; and a secondary section valve which is open in the air heat pump operation. The method includes closing of the secondary section valve; opening of the primary section valve, so that refrigerant flows directly from the refrigerant compressor to the external heat exchanger; and setting an inlet-side pressure level of the refrigerant on the external heat exchanger to a target pressure which corresponds to a condensation temperature (Tkond) of the refrigerant in the range: 2° C.≤Tkond≤20° C., in particular 4° C.≤Tkond≤10° C. |
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Bibliography: | Application Number: US202017801601 |