Refrigerant for air conditioning units, especially for cars, comprises a base substance for heat transfer and a strong-smelling substance to provide warning of leaks in the system

摘要

A refrigerant (I) for an air-conditioning unit, comprises a base substance for heat transfer (II) and a sensorially-active odorant (III) with an olfactory threshold for humans of less than 100 ppm. Independent claims are included for (1) an air conditioner unit for motor vehicles containing (I) as refrigerant (2) a method for detecting leakages in sealed coolant circuits by using a refrigerant (I) containing an odorant with an olfactory threshold of less than 100 (preferably less than 0.1) ppm, which outgasses from a leak at atmospheric pressure to provide warning of the leak .