A method for thermal management of a motor vehicle includes circulating of coolant, in a first operating state, at least in a motor cooling circuit through a series circuit that includes a motor circuit pump, an electric motor, and a low temperature (LT) radiator where the motor circuit pump is activated and where the coolant flows in a first direction through the LT radiator. The method further includes, time-shifted with respect to the first operating state, circulating of coolant, in a second operating state, at least in a chiller cooling circuit through a series circuit including a chiller, a chiller section pump, the motor circuit pump, and the LT radiator where the chiller section pump is activated, where the motor circuit pump is deactivated, where the coolant flows in a second direction through the LT radiator, and where the second direction is opposed to the first direction.

A refrigerant management system in a heat flux management system for an electric vehicle and a method of refrigerant management is provided. The system includes a vehicle air conditioning circuit including a heat pump circuit and a refrigeration cycle refrigerant circuit, the air conditioning circuit including a heat pump condenser in thermal communication with a heat source, a refrigerant evaporator in thermal communication with the heat source, an evaporator associated with an expansion valve, and a refrigerant compressor where the components are fluidly connected to one another by a refrigerant line. An accumulator is fluidly coupled in the refrigerant line downstream of the heat pump condenser, the refrigerant evaporator and evaporator and upstream of the refrigerant compressor, and the air conditioning circuit is switchable between a heating mode and a cooling mode in which the refrigerant circuit is in fluid communication with the compressor by actuation of at least one valve.

A thermal management circuit for a hybrid or electric vehicle is disclosed. The thermal management circuit has a first reversible air conditioning loop in which a refrigerant circulates and includes a two-fluid heat exchanger arranged jointly on a second loop for the circulation of a heat-transfer fluid. The second loop for the circulation of a heat-transfer fluid includes a first circulation branch including in the direction in which the heat-transfer fluid circulates, a first pump, a first radiator arranged in an internal air flow, and a battery heat exchanger. A second circulation branch is connected in parallel with the second radiator and includes a second pump and an electric device for heating the heat-transfer fluid. A third circulation branch connected in parallel with the first pump and the battery heat exchanger includes the two-fluid heat exchanger.

The present invention relates to a gas heat pump system. The gas heat pump system, according to one embodiment of the present invention, comprises: an air conditioning module comprising a compressor, an outdoor heat exchanger, an expansion apparatus, an indoor heat exchanger and a refrigerant line; and an engine module comprising an engine for combusting a mixture of fuel and air, thereby providing power for driving the compressor. The engine module comprises: a mixer for mixing and discharging the air and fuel; a supercharging means for receiving the mixture discharged from the mixer, compressing same, and then discharging same; an intercooler for receiving the mixture compressed in the supercharging means, cooling same by a heat exchange method, increasing the density thereof, and then discharging same; an adjustment means for receiving the mixture discharged from the intercooler, adjusting the quantity thereof, and then supplying same to the engine; and an exhaust gas heat exchanger for exchanging heat between a coolant and exhaust gas discharged from the engine.

A refrigerant circuit system includes a compressor configured to compress refrigerant, a condenser configured to cause the compressed refrigerant to radiate heat, first and second evaporators each configured to decompress and expand the heat-radiated refrigerant by regulating a valve opening degree, first and second evaporators provided in parallel and configured to cause the refrigerant, respectively decompressed and expanded by the first and second expansion valves, to absorb heat, and a controller configured to, based on first information related to a temperature of a first temperature regulated object, regulated by the first evaporator, second information related to a temperature of a second temperature regulated object, regulated by the second evaporator, and third information related to a degree of superheat of the refrigerant at an inlet of the compressor, control the valve opening degrees of the first and second expansion valves and a compression ratio of the refrigerant by the compressor.

The invention relates to a heat treatment system (1) for a vehicle, comprising a coolant circuit (2) and a heat transfer fluid loop (3), the heat transfer fluid loop (3) comprising at least one heat exchanger (12, 35) configured to dissipate heat in an air flow (18, 19), the coolant circuit (2) comprising, in this order and according to a direction of circulation of the coolant in the coolant circuit (2), at least one compression device (4), a first heat exchanger (5) which thermally couples the heat transfer fluid loop (3) with the coolant circuit (2), a device (6) for accumulation of the coolant, a first passage (8) of an internal heat exchanger (7), an expansion member (9), a second heat exchanger (10) arranged in order to be passed through by an air flow (19) external to a passenger compartment of the vehicle and a second passage (11) of the internal heat exchanger (7).

A heat pump air-conditioning system for a vehicle includes a refrigerant circuit, an auxiliary heater, and a control unit. The control unit compares a difference between a target blowout temperature and an actual blowout temperature with a predetermined first temperature threshold value in magnitudes, The control unit adjusts an opening degree of a first expansion valve and an opening degree of a second expansion valve. The control unit adjusts an output power of the auxiliary heater. The control unit executes a plurality of different modes of a heat pump air-conditioning to control the actual blowout temperature to approach and maintain at the target blowout temperature.

A gas injection type heat management system includes a first refrigerant line along which a compressor, an inner condenser, a first expansion valve, and a flash tank are sequentially provided and through which a refrigerant flows, a second refrigerant line along which a second expansion valve and an evaporator are sequentially provided and the refrigerant flows from the flash tank and circulates to the compressor via the second expansion valve and the evaporator, a third refrigerant line configured such that the refrigerant discharged from the flash tank flows directly to the compressor and a heat absorber for performing heat exchange between the refrigerant discharged from the inner condenser and the refrigerant discharged from the flash tank, and a controller for controlling whether to operate the compressor, whether to allow the refrigerant to flow and whether to expand the refrigerant.

The present invention relates to a coolant heater comprising: a heating element for heating coolant; a first housing for accommodating the heating element; a cover plate for sealing the first housing in which the heating element is accommodated; a temperature fuse provided in an external space formed by coupling the first housing and the cover plate, and disposed to be adjacent to the cover plate; and a second housing for pressing the temperature fuse so as to pressurize the same toward the cover plate, wherein overheat sensing responsiveness of the heating element is improved such that the overheat of the heating element can be prevented, and failure factors in a part in which the temperature fuse is coupled are reduced such that a durability is improved.

A heat pump system for a vehicle includes: a cooling apparatus that includes a coolant line, and circulates a coolant in the coolant line; and an air conditioning device that circulates a refrigerant along a refrigerant line to control an indoor temperature of the vehicle, wherein the air conditioning device may include first and second heat exchangers connected through the refrigerant line, and in a heating mode of the vehicle, the first heat exchanger and the second heat exchanger may be supplied with a refrigerant separated into the refrigerant line and a first branch line after being expanded, or a refrigerant expanded after being separated into the refrigerant line and the first branch line.