Abstract: The present disclosure relates to a method for operating a refrigerant circuit through which a refrigerant circulates, in which heat is transferred from a first heat source to the refrigerant in a first heat pump mode, and from a second heat source to the refrigerant in a second heat pump mode. Efficiency and heating capacity are increased therewith in that heat is transferred to the refrigerant simultaneously from both the first heat source and the second heat source in a combined heat pump mode. The disclosure also relates to an air conditioning system that contains a refrigerant circuit operated in this manner.

Abstract: An air-conditioning system for a motor vehicle may include at least two indirect heat exchangers through each of which both water and air is flowable. The water and the air may be fluidically separated from one another such that heat is transferable therebetween. The system may also include a warm water supply, a cold water supply, and at least two temperature-control devices each including a respective indirect heat exchanger of the at least two indirect heat exchangers. The warm and/or cold water supply may be in fluid communication with the at least two indirect heat exchangers. At least one indirect heat exchanger of the at least two indirect heat exchangers may communicate with the warm water supply and the cold water supply via an adjustable and controllable valve device such that a mixing ratio of a mixture of the warm water and the cold water introduced therein is adjustable.

Abstract: An air-conditioning system for a motor vehicle may include at least two indirect heat exchangers through each of which both water and air is flowable. The water and the air may be fluidically separated from one another such that heat is transferable therebetween. The system may also include a warm water supply, a cold water supply, and at least two temperature-control devices each including a respective indirect heat exchanger of the at least two indirect heat exchangers. The warm and/or cold water supply may be in fluid communication with the at least two indirect heat exchangers. At least one indirect heat exchanger of the at least two indirect heat exchangers may communicate with the warm water supply and the cold water supply via an adjustable and controllable valve device such that a mixing ratio of a mixture of the warm water and the cold water introduced therein is adjustable.