A heat control device is provided in a vehicle including a first thermal circuit that circulates a coolant and a second thermal circuit that circulates a refrigerant while changing the state of the refrigerant and is able to exchange heat with the first thermal circuit. When there is a heat discharge request from the second thermal circuit, the heat control device includes a determination unit configured to determine an amount of operation of each of a plurality of units which are used to discharge heat such that the heat discharge request is satisfied and the sum of power consumption values of the plurality of units is minimized.

A heat pump system for a vehicle may adjust a temperature of a battery module by use of one chiller that performs heat exchange between a refrigerant and a coolant, and improve heating efficiency by use of waste heat generated from an electrical component and the battery module, in increasing the flow rate of the refrigerant by operating the gas injection unit in the heating mode or the heating/dehumidification mode of the vehicle, thereby reducing power consumption of a compressor and maximizing heating performance.

The present disclosure relates to a gas injection type heat management system for a vehicle, which adopts a heat exchanger capable of reducing the amount of use of a separate heater during an initial heating process by using energy consumed by a compressor during a heating process using heat exchange between circulating refrigerants.

Systems and methods for heating and cooling a vehicle using a heat pump are disclosed herein. In one embodiment, a system for heating and cooling the vehicle includes a heat pump having: a compressor located in an engine compartment of the vehicle, and an evaporator located in a sleeper or a cab of the vehicle. The system also includes a controller for selecting a cooling mode or a heating mode for the heat pump.

A refrigeration cycle device includes a compressor, a radiator, an air-conditioning heat exchanger, a cooling heat exchanger, an air-conditioning decompression unit, a cooler-unit decompression unit, a refrigerant flow rate detector, and a controller. The radiator is configured to radiate heat of refrigerant discharged from the compressor. The air-conditioning heat exchanger absorbs heat from air to evaporate the refrigerant. The cooling heat exchanger is arranged in parallel with the air-conditioning heat exchanger in the flow of refrigerant. The air-conditioning decompression unit adjusts a decompression amount of the refrigerant flowing into the air-conditioning heat exchanger. The cooler-unit decompression unit adjusts a decompression amount of the refrigerant flowing into the cooling heat exchanger. The controller controls the operation of the cooler-unit decompression unit so that the flow rate of the refrigerant detected by the refrigerant flow rate detector exceeds a predetermined reference flow rate.

A refrigeration cycle device including a first pressure reducing valve, a first evaporator that exchanges heat between the refrigerant decompressed in the first pressure reducing valve and air, a second pressure reducing valve that is disposed in parallel with the first pressure reducing valve; a second evaporator in which the refrigerant decompressed in the second pressure reducing valve to absorbs heat from a battery; a third pressure reducing valve that reduces the pressure of the refrigerant evaporated in the second evaporator; and a controller configured to control opening degrees of the second pressure reducing valve and the third pressure reducing valve. The controller performs a limit control for controlling the opening degree of the second pressure reducing valve to an opening degree of smaller one of a battery cooling opening degree and an air cooling opening degree.

Systems and methods for heating and cooling a vehicle using a heat pump are disclosed herein. In one embodiment, a system for heating and cooling the vehicle includes a heat pump having: a compressor located in an engine compartment of the vehicle, and an evaporator located in a sleeper or a cab of the vehicle. The system also includes a controller for selecting a cooling mode or a heating mode for the heat pump. In one embodiment, the system includes a clutch for engaging the compressor with a transmission of the vehicle.

A temperature control system to be installed in an electric vehicle includes a water circuit, a coolant circuit, a radiator, a heat exchanger, a water pump, and a controller. The water circuit circulates cooling water to cool an electric device. The coolant circuit circulates a coolant to control a temperature of a cabin or battery of the electric vehicle. The radiator is disposed in the water circuit. The heat exchanger is disposed in the coolant circuit and receives heat released from the radiator through cooling air delivered from the radiator. The water pump regulates a flow rate of the cooling water circulating in the water circuit. The controller increases the number of rotations of the water pump to a greater value in a condition where an increase in temperature of the cabin or the battery is requested than in a normal condition where the increase in temperature is not requested.

Heat management system includes a refrigerant circulation line including a compressor for compressing and discharging a refrigerant, a water cooling-type condenser for condensing the compressed refrigerant using cooling water, a first expansion valve for expanding the condensed refrigerant, and a water cooling-type evaporator for evaporating the expanded refrigerant using cooling water; a heating line including a heater core which circulates the cooling water that has exchanged heat in the water cooling-type condenser, and thereby generates conditioned air for heating; a cooling line including a cabin cooler which circulates the cooling water that has exchanged heat in the water cooling-type evaporator, and thereby generates conditioned air for cooling; and a cooling line which is connected to or disconnected from the heating line according to the cooling/heating mode, and cools a battery and an electrical component.

The present disclosure relates to a thermal management system of gas injection type for a vehicle and, more particularly, to a thermal management system of gas injection type for a vehicle, which can implement various types of heating and cooling modes according to vehicle operating conditions and improve heating efficiency by increasing the flow rate of circulating refrigerant.