Method for operating a refrigerant circuit of a cooling system of a vehicle

Abstract

A method of operating a refrigerant circuit (10) of a cooling system of a vehicle in cooling system mode is disclosed, the refrigerant circuit having a chiller branch (1.0) which includes a chiller (1) and a first expansion element (AE1) connected upstream from it and being thermally coupled to a coolant circuit (1.1); at least one interior evaporator branch (2.0) connected in parallel with the chiller branch (1.0), comprising an interior evaporator (2), a second expansion element (AE2) connected upstream from it, and a segmentation element connected downstream from the interior evaporator (2), being adapted to prevent a backflow of refrigerant into the interior evaporator; a refrigerant compressor (3); and a condenser or gas cooler (4), wherein the cooling system mode is carried out in single chiller mode by closing the second expansion element (AE2) and aspirating the refrigerant from the interior evaporator by the starting or already started refrigerant compressor (3).

Description

technical field [0001] The invention relates to a method for operating a refrigerant circuit of a refrigeration system of a vehicle during refrigeration system operation. Background technique [0002] The use of refrigerant circuits in vehicle air conditioning systems is known, some variants of which provide for a 2-evaporator arrangement, namely a front evaporator and a rear evaporator. Depending on the connection and the active / active operation of the corresponding heat transfer, the requirement of the active refrigerant required in the refrigerant circuit will vary. [0003] In addition to the front evaporator, electrified vehicles also require a separate cooling device as at least one interior evaporator for temperature control and regulation of the energy store, which is usually realized in the form of a high-voltage battery. This type of cooling can be achieved through a refrigerant circuit and is called active battery cooling. Such a cooling device is realized as a ...

AI Technical Summary

Problems solved by technology

The higher low pressure disadvantageously leads to a higher density of the refrigerant on the low pressure side and at the same time there is a risk of premature superheating of the refrigerant after the refrigerator and thus the escape of the refrigerant at the low pressure-refrigerant collector

If a refrigerant collector on the high pressure side is used, the effect that subcooling at the condenser or gas cooler can no longer be regulated since the refrigerant collector is no longer fully supplied with refrigerant

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