US 12,291,081 B2
Method and system for operating a refrigeration system with a heat pump function and a regeneration function for heat sources and a motor vehicle including such a system
Christian Rebinger, Munich (DE); Dirk Schroeder, Manching (DE); and Helmut Rottenkolber, Mindelstetten (DE)
Assigned to Audi AG, Ingolstadt (DE)
Appl. No. 18/042,825
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Oct. 19, 2021, PCT No. PCT/EP2021/078959
§ 371(c)(1), (2) Date Feb. 24, 2023,
PCT Pub. No. WO2022/084322, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 102020127528.5 (DE), filed on Oct. 20, 2020.
Prior Publication US 2023/0294481 A1, Sep. 21, 2023
Int. Cl. B60H 1/22 (2006.01); B60H 1/00 (2006.01); B60H 1/32 (2006.01)
CPC B60H 1/2221 (2013.01) [B60H 1/00271 (2013.01); B60H 1/32 (2013.01); B60H 2001/00307 (2013.01); B60H 2001/00949 (2013.01); B60H 2001/00957 (2013.01); B60H 2001/3263 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for operating a refrigeration system having a heat pump function for a motor vehicle, wherein the refrigeration system comprises:
a refrigerant compressor, which is connectable or connected to a primary line and a secondary line;
a directly or indirectly acting external heat exchanger, which is arranged in the primary line;
an evaporator, which is arranged in the primary line;
at least one further heat exchanger representing a heat source which is arranged in the secondary line;
a primary line valve arranged between the refrigerant compressor and the external heat exchanger;
a secondary line valve arranged between the refrigerant compressor and the further heat exchanger representing a heat source;
a third heat exchanger which operates as a water heat pump and acts directly or indirectly;
wherein the method comprises the following steps:
setting a heat pump operation in which the refrigerant is routed from the refrigerant compressor into the secondary line;
setting an expansion valve assigned to the third heat exchanger such that a total mass flow of refrigerant flows through the third heat exchanger and is evaporated in the third heat exchanger by waste heat from coolant circulating in the third heat exchanger;
detecting the temperature of the coolant in or at the third heat exchanger;
wherein the total mass flow of refrigerant is routed through the third heat exchanger when the temperature of the coolant is greater than an upper limiting temperature,
wherein an expansion valve assigned to the external heat exchanger is set in such a way that a partial mass flow flows through the external heat exchanger operating as an air heat pump, wherein at the same time the expansion valve assigned to the third heat exchanger is set in such a way that a partial mass flow of refrigerant continues to flow through the third heat exchanger.