US 12,220,969 B2
Cooling system with a heat pump function based on an extendable base system and motor vehicle with a cooling system of this type
Christian Rebinger, Munich (DE); and Dirk Schroeder, Manching (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 17/928,704
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Apr. 6, 2021, PCT No. PCT/EP2021/058833
§ 371(c)(1), (2) Date Nov. 30, 2022,
PCT Pub. No. WO2022/008112, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 10 2020 117 701.1 (DE), filed on Jul. 6, 2020.
Prior Publication US 2023/0234421 A1, Jul. 27, 2023
Int. Cl. B60H 1/00 (2006.01); B60H 1/32 (2006.01)
CPC B60H 1/00899 (2013.01) [B60H 1/00278 (2013.01); B60H 1/32281 (2019.05)] 19 Claims
OG exemplary drawing
 
1. A cooling system with a heat pump function for a motor vehicle, comprising
a base system with
a refrigerant compressor;
a directly or indirectly working external heat exchanger which is arranged downstream of the refrigerant compressor;
a directly or indirectly working first evaporator as part of an air conditioning device for the interior air conditioning of the motor vehicle, the first evaporator is arranged downstream of the external heat exchanger and which is preceded by a first expansion element;
at least one second evaporator, in particular a chiller, as part of a cooling device of an electric drive or storage unit, the second evaporator is arranged fluidically parallel to the first evaporator and which is preceded by a second expansion element;
at least one low-pressure side collector arranged downstream of the first and second evaporators, or at least one high-pressure side collector arranged downstream of the external heat exchanger and upstream of the first and second evaporators,
wherein the base system forms a primary line and, to achieve the heat pump function, can be fluidically connected to a secondary line which branches off from the base system downstream of the refrigerant compressor and which has a second heat exchanger working as a heat source for direct or indirect air heating, in particular a heating register, which is part of the air conditioning device,
wherein an expansion valve is provided in the secondary branch downstream of the heating register, wherein the expansion valve is preceding the external heat exchanger.