Method for checking the refrigerant-fluid level of a closed loop vehicle air-conditioning system
AssigneeValeo Climatisation
InventorsJin Ming Liu, Bruno Hamery
Life of this patent
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Abstract
A signal value is derived that is representative of the cooling power produced by an air-conditioning evaporator, the signal value being derived from at least one temperature sensor placed in thermal contact with the evaporator, or downstream from it in the cooled airflow, and the signal value is compared with a reference value corresponding to a normal refrigerant-fluid level. A signal value below the reference value indicates a low level of refrigerant-fluid.
Claims12
A method for checking the refrigerant-fluid level of a closed loop air conditioning system for air conditioning a passenger compartment of a motor vehicle, the system including an evaporator suitable for cooling an airflow to be sent into the passenger compartment, wherein a signal value is derived representative of the cooling power produced by the evaporator, from at least one temperature sensor placed in thermal contact with the evaporator or downstream from it in the said airflow, and the signal value of said signal is compared with a reference value corresponding to a normal refrigerant-fluid level, a signal value below the reference value indicating a low refrigerant-fluid level.
Dependencies are inferred from the claim text.