An air conditioner is configured to be switchable between a heating mode and a cooling mode. In the cooling mode, a high-temperature heat medium circulates between a high-pressure side refrigerant-heat medium heat exchanger and a high-temperature heat medium-outside air heat exchanger in a state where a refrigerant circulates in an air-cooling heat exchanger. In the heating mode, the high-temperature heat medium circulates between the high-pressure side refrigerant-heat medium heat exchanger and an air-heating heat exchanger, while a low-temperature heat medium circulates between a low-pressure side refrigerant-heat medium heat exchanger and a low-temperature heat medium-outside air heat exchanger, in a state where the refrigerant circulates in the low-pressure side refrigerant-heat medium heat exchanger.

A vehicular heat management system includes a heat pump cycle capable of heating a heat-exchanging-object fluid by using exhaust heat of an in-vehicle device as a heat source that radiates heat during operation, and an exhaust-heat refrigerant circuit that releases the exhaust heat to outside air through an exhaust-heat refrigerant. The heat pump cycle includes a recovery heat exchange portion that performs heat exchange between a heated air heated by the exhaust heat and a cycle refrigerant circulating in the heat pump cycle. The exhaust-heat refrigerant circuit includes an exhaust-heat exchange portion that performs heat exchange between the heated air and the exhaust-heat refrigerant. The recovery heat exchange portion and the exhaust-heat exchange portion are integrally formed as a combined heat exchanger capable of transferring heat between the cycle refrigerant and the exhaust-heat refrigerant.

An air-conditioning device includes a heater unit that heats the air to be lead to a vehicle cabin using the heat of the refrigerant compressed by a compressor, a liquid receiver arranged at the downstream side of an outside heat exchanger, a liquid receiver separating the refrigerant lead from the outside heat exchanger into a liquid-phase refrigerant and a gaseous-phase refrigerant and storing the liquid-phase refrigerant, and a restrictor mechanism provided between the heater unit and the outside heat exchanger, the restrictor mechanism decompressing and expanding the refrigerant. When there is a dehumidification request, the operation mode is temporarily switched from a dehumidifying cabin-heating mode which evaporates the refrigerant by an evaporating unit and radiates heat by the heater unit in the state in which the restrictor mechanism restricts the flow of the refrigerant, to the cabin-cooling mode which evaporates the refrigerant by the evaporating unit while promoting the storage of the liquid-phase refrigerant in the liquid receiver.

A control method of a heat pump system for a vehicle may include a first cooling apparatus having a first radiator, a first water pump, an electrical component, a valve, and a branch line, which are connected by a first coolant line and circulate a first coolant by the first water pump to the electrical component; a second cooling apparatus including a second radiator and a second water pump connected by a second coolant line; and an air conditioning apparatus including a compressor, a heater, an expansion valve, and a heat exchanger which are connected by a refrigerant line circulated with a refrigerant.

A heat pump system for a vehicle is provided and includes a cooling apparatus configured to circulate a coolant in a coolant line to cool at least one electrical component provided in the coolant line, a battery cooling apparatus configured to circulate the coolant in the battery module, a heating apparatus configured to heat a vehicle interior by using the coolant, and a chiller configured to adjust a temperature of the coolant by heat-exchanging the coolant with a refrigerant, wherein the chiller is connected to the chiller connection line through a third valve provided in the coolant line between the radiator and the second valve, and the reservoir tank is provided in the coolant line between the radiator and the second valve, and is connected to the supply line connecting a first valve and a first water pump through a supply line.

A heat pump system for a vehicle may include first and second cooling apparatuses; a battery module; and a controller electrically connected to the first and second cooling apparatuses, the battery module, and an air conditioner apparatus to selectively control the first and second cooling apparatuses, the battery module, or the air conditioner apparatus according to a vehicle mode, wherein the heat exchanger provided in the air conditioner apparatus is connected to each of the first and second coolant lines to enable the coolants circulating in the first and second cooling apparatuses to pass through the heat exchanger, and a refrigerant passing through the heat exchanger is selectively condensed or evaporated depending on the vehicle mode through mutual heat exchange with the coolant supplied from any one of the first coolant line and the second coolant line, or the coolants supplied through the first and second coolant lines, respectively.

A vehicle cooling/heating system includes a coolant line in which coolant is circulated between a heat source component of a vehicle that provides waste heat and a chiller and a refrigerant line in which refrigerant is circulated through a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant line performs indoor cooling through the evaporator. A controller controls the coolant line such that, during a king mode in which it is necessary to dry the evaporator, the coolant in the coolant line is circulated or not circulated through the heat source component and the chiller; and controls the coolant line such that the refrigerant in the refrigerant line flows in an order of the compressor, the evaporator, and the chiller.

A thermal management system may include a first cooling circuit cooling PE parts and including a first radiator, a first coolant line circulating a coolant between the first radiator and the PE parts, and a first electric water pump circulating the coolant along the first coolant line, a heat pump system including a compressor compressing a refrigerant, an internal condenser performing a heat exchange between the compressed refrigerant and air supplied inside a vehicle, a refrigerant line circulating the refrigerant between the compressor and the internal condenser, and a heat exchanger for the heat exchange between the coolant and the refrigerant, a flow increase bypass line between the first coolant lines on the entrance and exit sides of the PE parts, and a coolant control valve provided at location where the flow increase bypass line is branched in the first coolant line and controlling a flow direction of the coolant.

A heat request arbitration device includes: a first thermal circuit; a second thermal circuit; a third thermal circuit having path patterns that are selectable as a path that is heat exchangeable with each of the first thermal circuit and the second thermal circuit; and heat source units configured to absorb heat or radiate heat via a heat medium circulating in at least one of the thermal circuits; a derivation unit configured to derive requests related to heat flow control of heat absorbed or radiated by each of the heat source units; and a selection unit configured to select a path for at least one of the thermal circuits so as to satisfy at least one of the requests related to the heat flow control based on the requests related to the heat flow control derived by the derivation unit.

A heat pump system for a vehicle may control a temperature of a battery module by use of one chiller in which a refrigerant and a coolant are heat-exchanged; and may increase a flow rate of the refrigerant by applying a gas injection device that selectively operates in a cooling, heating, or dehumidifying mode of a vehicle, maximizing cooling and heating performance.