초록 ▼

A method for operating a refrigerating unit for the air conditioning of vehicles and a refrigerating unit for carrying out the method, are provided. In order to make available refrigerating capacity, on the high pressure side of a vapor compression circuit, a pressure is produced which, with respect

A method for operating a refrigerating unit for the air conditioning of vehicles and a refrigerating unit for carrying out the method, are provided. In order to make available refrigerating capacity, on the high pressure side of a vapor compression circuit, a pressure is produced which, with respect to the critical pressure of a refrigerant circulating in the circuit, is supercritical and, at the same time, on the low pressure side of the circuit, a subcritical pressure is achieved. In this arrangement, the circuit contains a compressor, a gas cooler, a throttle device and an evaporator which are series-connected and form an integral, closed circuit. The refrigerant, which is cooled on the low pressure side, is supplied, via the evaporator, with thermal energy, and refrigerating energy is removed. In order to increase the efficiency and the comfort of the system to such an extent that an air conditioning system operating with this unit is suitable for use in a vehicle, the refrigerant mass flow in the circuit is varied by regulating the refrigerant flow rate in the compressor.

대표청구항 ▼

A method for operating a cooling system for air conditioning vehicles, the cooling system having a vapor compression circuit with a high pressure side and a low pressure side, the vapor compression circuit having a compressor, a gas cooler, a throttle device and an evaporator coupled in series formi

A method for operating a cooling system for air conditioning vehicles, the cooling system having a vapor compression circuit with a high pressure side and a low pressure side, the vapor compression circuit having a compressor, a gas cooler, a throttle device and an evaporator coupled in series forming an integral, closed circuit, the method comprising the steps of: producing a pressure on the high pressure side which, with respect to a critical pressure of a refrigerant circulating in the circuit, is supercritical, in order to make available refrigerating capacity; at the same time, achieving a subcritical pressure on the low pressure side of the circuit, the cold refrigerant on the low pressure side is supplied via the evaporator with thermal energy and refrigerating energy being removed; and varying a refrigerant mass flow in the vapor compression circuit by regulating a refrigerant flow rate in the compressor.