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 ...

Examples

Embodiment Construction

[0029] For simplicity, figure 1 with figure 2In each case, a refrigerant circuit 10 of a refrigeration system of a vehicle is shown, which refrigerant circuit is provided for pure AC operation (refrigeration system operation). Since the basic idea used to describe the method can be fully explained with a simple wiring concept and the functionality can be transferred directly to the heat pump-capable device and its inactive sectors, a functional expansion regarding the operation of the heat pump is omitted. The refrigerant circuits 10 are constructed with the same basic structure and differ in each case with regard to the arrangement of the refrigerant collectors as low-pressure or high-pressure refrigerant collectors. It should be mentioned here that the refrigerant collector arranged on the low-pressure side can be used for both subcritical and supercritical operating refrigeration equipment, while the high-pressure collector is mainly used for purely subcritical operating ...

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 ...

Examples

Embodiment Construction

[0029] For simplicity, figure 1 with figure 2In each case, a refrigerant circuit 10 of a refrigeration system of a vehicle is shown, which refrigerant circuit is provided for pure AC operation (refrigeration system operation). Since the basic idea used to describe the method can be fully explained with a simple wiring concept and the functionality can be transferred directly to the heat pump-capable device and its inactive sectors, a functional expansion regarding the operation of the heat pump is omitted. The refrigerant circuits 10 are constructed with the same basic structure and differ in each case with regard to the arrangement of the refrigerant collectors as low-pressure or high-pressure refrigerant collectors. It should be mentioned here that the refrigerant collector arranged on the low-pressure side can be used for both subcritical and supercritical operating refrigeration equipment, while the high-pressure collector is mainly used for purely subcritical operating ...

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