Abstract: The invention relates to a combined plant/heat pump circuit with a compressor, a multi-way valve arranged downstream, an external heat exchanger as well as an interior heat exchanger and an internal heat exchanger. A multi-way valve is integrated into the refrigerant circuit such that a line loop is created in which one after the other the internal heat exchanger and an expansion element passable in one direction are arranged and such that the internal heat exchanger is always at the high pressure level and the internal heat exchanger is always at the low pressure level of the refrigerant circuit thereby avoiding the condensation of the refrigerant in the internal heat exchanger in heat pump operation.

Abstract: The invention relates to a combined cooling plant/heat pump for use in motor vehicles for the cooling, heating and dehumidification of the vehicle interior. A refrigerant circuit is thermally coupled to the ventilation system over an internal heat exchanger having two functional units. The functional units are switchable as the condenser/gas cooler of the heat pump (in heating operation) and as the evaporator of the cooling plant (in cooling operation). In a combined dehumidification-reheating operation, one of these functional units is operable as an evaporator and the other as condenser/gas cooler.

Abstract: The invention relates to an inner heat exchanger for high-pressure refrigerants which is also used as an accumulator or refrigerant collector in air conditioning circuits. The inner heat exchanger includes an outer cylinder arranged and an inner cylinder arranged therein. The inner cylinder is designed as a bent flat sheet or tube with microchannels for refrigerant under high pressure. The liquid refrigerant under low pressure is collectable within the inner cylinder. Between inner cylinder and outer cylinder are formed channels in which the vaporous refrigerant under low pressure flows from a low-pressure inlet to a low-pressure outlet.

Abstract: The invention relates to a combined plant/heat pump circuit with a compressor, a multi-way valve arranged downstream, an external heat exchanger as well as an interior heat exchanger and an internal heat exchanger. A multi-way valve is integrated into the refrigerant circuit such that a line loop is created in which one after the other the internal heat exchanger and an expansion element passable in one direction are arranged and such that the internal heat exchanger is always at the high pressure level and the internal heat exchanger is always at the low pressure level of the refrigerant circuit thereby avoiding the condensation of the refrigerant in the internal heat exchanger in heat pump operation.

Abstract: The invention relates to a combined cooling plant/heat pump for use in motor vehicles for the cooling, heating and dehumidification of the vehicle interior. A refrigerant circuit is thermally coupled to the ventilation system over an internal heat exchanger having two functional units. The functional units are switchable as the condenser/gas cooler of the heat pump (in heating operation) and as the evaporator of the cooling plant (in cooling operation). In a combined dehumidification-reheating operation, one of these functional units is operable as an evaporator and the other as condenser/gas cooler.

Abstract: A heat exchanger module includes a glycol coolant circuit adapted to function as a heat pump for the heating of the interior passenger compartment of the motor vehicle with a glycol/water mixture as the heat carrier, a refrigerant circuit, and a glycol/refrigerant heat exchanger positioned between and interconnecting the cooling circuit and the refrigerant circuit, wherein the glycol/refrigerant heat exchanger has integrated connection lines for heat transfer from the coolant circuit to the refrigerant circuit.

Abstract: A combined cooling and heating system having a simple design of a combined cooling and heat pump plant, especially for the heating and cooling of the passenger cells of motor vehicles. The concept of the invention is that the combined cooling and heat pump plant has a decompression device that fulfills the functions of a decompression device and a mode switch. The advantage of the invention is that dependent on the direction of flow, and thus the operational mode of the device, the decompression function and the blocking function, or the pressure relief function are realised by one component, the decompression device.

Abstract: A heat exchanger module includes a glycol coolant circuit adapted to function as a heat pump for the heating of the interior passenger compartment of the motor vehicle with a glycol/water mixture as the heat carrier, a refrigerant circuit, and a glycol/refrigerant heat exchanger positioned between and interconnecting the cooling circuit and the refrigerant circuit, wherein the glycol/refrigerant heat exchanger has integrated connection lines for heat transfer from the coolant circuit to the refrigerant circuit.

Abstract: A heat exchanger, particularly for a thermal coupling of a glycol/water cooling system circuit and a refrigerant circuit in a motor vehicle includes a plurality of first plates having first flow channels for refrigerant and a first reservoir in fluid communication with the first flow channels integrally formed therein, a plurality of second flow plates having second flow channels for a glycol/water mixture, and a second reservoir mounted to a side of said heat exchanger and in fluid communication with the second flow plates.

Abstract: A combined cooling and heating system having a simple design of a combined cooling and heat pump plant, especially for the heating and cooling of the passenger cells of motor vehicles. The concept of the invention is that the combined cooling and heat pump plant has a decompression device that fulfills the functions of a decompression device and a mode switch. The advantage of the invention is that dependent on the direction of flow, and thus the operational mode of the device, the decompression function and the blocking function, or the pressure relief function are realized by one component, the decompression device.