Audi Ag

Hanon Systems

Halla Visteon Climate Control Corporation

Dirk Schroeder

Christian Rebinger

Helmut Rottenkolber

Peter Heyl

Hans Hammer

Marc Graaf

Thomas Anzenberger

Jörg Bodewig

Florian Wieschollek

Raymond Ambs

Juergen Hoppen

Klaus Strasser

Stephen Rost

Marco Will

Thomas Haltmeier

Jan Wack

Ruben Gonzalez

Engelbert Schmitz

Simon Bogner

A radiator arrangement for a motor vehicle the motor vehicle is driven by an internal combustion engine or at least partially electrically, with a first heat exchanger that is connected to a coolant circuit of the motor vehicle; and with a second heat exchanger that is connected to a refrigerant circuit of the motor vehicle. With respect to a main direction of an air flow through the radiator arrangement, the first heat exchanger is arranged in front of the second heat exchanger, and a first base area of the first heat exchanger that is exposed to the air flow is smaller than a second base area of the second heat exchanger that is exposed to the air flow. The first base area is dimensioned such that it overlaps the second base area only in an inlet-side region with respect to the refrigerant flow in the second heat exchanger.

Radiator arrangement with at least two heat exchangers with different base areas, motor vehicle with radiator arrangement

A refrigeration system having a heat pump function for a motor vehicle. The refrigeration system includes: a refrigerant compressor which is connectable or connected to a primary line; a directly or indirectly acting external heat exchanger, which is arranged in the primary line; a first evaporator, which is arranged in the primary line; a first directly or indirectly acting heat exchanger, in particular a chiller, which is arranged fluidically in parallel to the evaporator; and a refrigerant collector arranged on the low-pressure side. A single sensor device is arranged downstream of the evaporator and the further heat exchanger, in particular the chiller, which is configured to detect the pressure and the temperature of the refrigerant on the low-pressure side of the refrigeration system.

Refrigeration system having a heat pump function for a motor vehicle, having a single sensor device on the low-pressure side

A cooling system of a vehicle, including a coolant circuit, which can be operated as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation, an evaporator, a coolant compressor, a heat exchanger in the form of a coolant condenser or gas cooler for the coolant circuit or in the form of a heat pump evaporator for the heat pump circuit, a first expansion element which is paired with the evaporator, a second expansion element, the heat pump evaporator function of which is paired with the heat exchanger, and an inner heat exchanger with a high-pressure section and a low-pressure section. The low-pressure section is fluidically connected to the downstream coolant compressor. The high-pressure section of the inner heat exchanger is arranged in a coolant circuit section which connects the second expansion element to the heat exchanger.

Cooling system of a vehicle, comprising a coolant circuit which can be operated as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation

A reheating method for operating a refrigeration system for a motor vehicle is described, the refrigeration system includes a refrigerant compressor, which is connectable or connected to a primary line and a secondary line; an outer heat exchanger, which is arranged in the primary line; an evaporator, which is arranged in the primary line; a heating register, which is arranged in the secondary line; at least one movable temperature flap which is arranged upstream or downstream of the heating register in relation to a supply air flow direction; and at least one shut-off element, which is arranged downstream of the heating register in the secondary line. The reheating method includes adjusting the at least one shut-off element into a position in which refrigerant flows downstream of the heating register into the evaporator, while bypassing the external heat exchanger.

Reheating method for operating a refrigeration system for a motor vehicle, refrigeration system, and motor vehicle having a refrigeration system of this type

A method for operating a refrigeration system having a heat pump function for motor vehicle, including 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 detecting the temperature of the coolant in the third heat exchanger. 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.

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

A method for operating a refrigeration system for a motor vehicle. The method includes setting an operating mode of the refrigeration system having active primary line and inactive secondary line or having active secondary line and inactive primary line; detecting the pressure in the inactive line; and activating and extraction of refrigerant from the inactive line into the active line by lowering the pressure in the active line to a value below the pressure in the inactive line and by opening the relevant valve device.

Method for maximizing a refrigerant in active system sections of a refrigeration system, refrigeration system, and motor vehicle comprising such a refrigeration system

A reheating method for operating a refrigeration system for a motor vehicle. The refrigeration system includes a refrigerant compressor, connected to a primary line and a secondary line; an external heat exchanger; an evaporator; a heating register; at least one movable temperature flap; and at least one shutoff element, which is arranged downstream of the heating register in the secondary line. The reheating method includes following steps: setting the at least one shutoff element in a position in which the refrigerant flows into the evaporator downstream of the heating register while bypassing the external heat exchanger, and incorporating at least one further heat sink, which is fluidically arranged in parallel or in series to the evaporator, in particular a chiller operating as a water heat pump evaporator and/or the external heat exchanger operating as an air heat pump evaporator.

A cooling system with a heat pump function for a motor vehicle is described, includes 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, arranged down-stream of the external heat exchanger and preceded by a first expansion element. At least one second evaporator as part of a cooling device of an electric drive or storage unit, which 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.

Cooling system with a heat pump function based on an extendable base system and motor vehicle with a cooling system of this type

A method for operating a coolant circuit of a refrigeration system of a vehicle having multiple system sections. A single pressure sensor is located in each system section. A temperature sensor is arranged downstream at each component to be balanced in the system sections, such as heat exchangers and a coolant compressor. The sensor signals of the pressure and temperature sensors are supplied to a control unit for the control or regulation of the refrigeration system. Furthermore, a pressure approximation value at the position of the temperature sensor is calculated by a pressure loss value determined using a pressure loss calculation function starting from the position of the pressure sensor arranged in the system section of the component up to the position of the temperature sensor if the temperature sensor and the pressure sensor are arranged at different positions in the system section.

Method for operating a coolant circuit of a refrigeration system of a vehicle

A method of operating a refrigerant circuit of a cooling system of a vehicle in cooling system mode, having a chiller branch which includes a chiller and a first expansion element connected upstream from it and being thermally coupled to a coolant circuit, at least one interior evaporator branch connected in parallel with the chiller branch, comprising an interior evaporator, a second expansion element connected upstream from it, and a segmentation element connected downstream from the interior evaporator, being adapted to prevent a backflow of refrigerant into the interior evaporator, a refrigerant compressor, and a condenser or gas cooler, wherein the cooling system mode is carried out in single chiller mode by closing the second expansion element and aspirating the refrigerant from the interior evaporator by the starting or already started refrigerant compressor.

Method for operating a refrigerant circuit of a cooling system of a vehicle

A method for defrosting an external heat exchanger, operated as an air heat pump evaporator, of a cooling system for a motor vehicle. The cooling system includes a refrigerant compressor connected to a primary and secondary section; an external heat exchanger; an evaporator; a heating register; a primary section valve which is closed in the air heat pump operation; and a secondary section valve which is open in the air heat pump operation. The method includes closing of the secondary section valve; opening of the primary section valve, so that refrigerant flows directly from the refrigerant compressor to the external heat exchanger; and setting an inlet-side pressure level of the refrigerant on the external heat exchanger to a target pressure which corresponds to a condensation temperature (Tkond) of the refrigerant in the range: 2&#xb0; C.&#x2264;Tkond&#x2264;20&#xb0; C., in particular 4&#xb0; C.&#x2264;Tkond&#x2264;10&#xb0; C.

Method for defrosting an external heat exchanger, which is operated as an air heat pump, of a cooling system for a motor vehicle, cooling system, and motor vehicle having such a cooling system

A method for operating a refrigeration system for a vehicle, the refrigeration system including a refrigerant circuit with a heat pump function. The refrigerant circuit has an exterior heat exchanger, which is operated as a condenser or gas cooler to perform a refrigeration system mode or which is operated as a heat pump evaporator to carry out a heat pump mode. The refrigerant circuit further has an interior heating condenser or heating gas cooler for carrying out a heating mode. The interior heating condenser or heating gas cooler is fluidically connected downstream of the exterior heat exchanger with a reheating expansion device therebetween to carry out a reheating mode. The opening cross-section of the reheating expansion device is controlled in accordance with a refrigeration system parameter indicating the required reheating power.

Method for operating a vehicular refrigeration system having a refrigeration circuit with a heat pump function

A refrigeration system for a vehicle including a refrigerant circuit having a double-flow heat exchanger, it being possible to operate the heat exchanger as a refrigerant condenser/gas cooler for an AC mode or as an air heat pump evaporator for a heat pump mode. The first flow of the heat exchanger has a first refrigerant connection and the second flow of the heat exchanger has a second refrigerant connection. For double flow through the heat exchanger in AC mode the first refrigerant connection is a refrigerant inlet and the second refrigerant connection is a refrigerant outlet. For single flow through the heat exchanger in heat pump mode the second refrigerant connection is a refrigerant inlet.

Refrigeration system for a vehicle, comprising a refrigerant circuit having a heat exchanger, and heat exchanger for such a refrigeration system

A method for operating a refrigeration system for a vehicle with a refrigerant circuit including a heat exchanger. A controllable environmental air flow (L) is flowed through the heat exchanger and the heat exchanger can be operated as a refrigerant condenser or a gas cooler for a refrigeration system operation.

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Manching, Germany

Dirk Schroeder