Provided is an air-conditioning device for a vehicle, including: a cooling device configured to cool air passing through a duct; a heater core, which is arranged in the duct on a downstream side of airflow with respect to the cooling device, and is configured to use an engine coolant as a heat source to heat the air; a water valve provided in a coolant circulation system on an upstream side of the heater core; and a controller configured to control those components, in which the controller is configured to decrease an opening amount of the water valve in a predetermined cooling mode. The control is configured to, when the opening amount of the water valve is decreased, decrease a rotational speed of a compressor of the cooling device, and increase a target evaporator temperature of an evaporator of the cooling device, thereby decreasing cooling performance of the cooling device.

An air conditioning system, a vehicle and a method of controlling the vehicle with a vehicle air conditioning system are provided. The vehicle air conditioning system has a refrigeration circuit having a compressor, a condenser, and an evaporator in sequential fluid communication, with a valve assembly and a battery chiller positioned for parallel flow with the evaporator. A cooling circuit in the vehicle has a chiller. A controller is configured to, in response to a temperature of the evaporator being less than a first predetermined value and the compressor operating at a predetermined speed, open the valve assembly to divert a portion of refrigerant through the chiller and away from the evaporator. The refrigerant may be diverted, for example, to raise the temperature of the evaporator and/or prevent cycling of the compressor.

A vehicle air-conditioning controller includes a battery temperature sensor configured to detect a battery temperature of a battery, a cooling-air temperature sensor configured to detect a temperature of cooling air that has passed an evaporator, and an air-conditioning ECU configured to determine a target ejection temperature of air to be ejected into a vehicle interior from an air conditioner. The air-conditioning ECU is configured to control a cooling device to cool the battery, during air conditioning of the vehicle interior through remote operation external of the vehicle, when the battery temperature is at a predetermined temperature or higher and a state wherein the difference between the target ejection temperature and the cooling-air temperature has been at or below a predetermined value for a predetermined time period.

A thermal management method and system in a vehicle include a chiller to cause heat transfer between a coolant loop that defines a path in which a coolant circulates and a refrigerant loop that defines a path in which a refrigerant circulates. The system includes an electronic expansion valve (EXV) in the refrigerant loop to control a flow of the refrigerant into a first part of the chiller, and a coolant pump in the coolant loop to control a flow of the coolant into a second part of the chiller. A controller controls the EXV and the coolant pump based on a target amount for the heat transfer.

A climate control circuit for a transport climate control system is provided. The circuit includes a compressor, a plurality of evaporators, a suction flow control device, and a controller. The suction flow control device is downstream of the plurality of evaporators and directs the working fluid from each of the evaporators to one of a main suction port and an auxiliary port of the compressor. The controller determines whether each of the evaporators is operating in a fresh temperature range or in a frozen temperature range. For each of the evaporators operating in the fresh temperature range, the controller instructs the suction flow control device to direct the working fluid from the corresponding evaporator to the auxiliary suction port. For each of the plurality of evaporators operating in the frozen temperature range, the controller instructs the suction flow control device to direct the working fluid to the main suction port.

A vehicle air conditioning device includes a compressor, a radiator, an outside heat exchanger, an evaporator, a first decompressor, a second decompressor, a switching portion, and a controller. The radiator exchanges heat between a refrigerant discharged from the compressor and air. The outside heat exchanger exchanges heat between outside air and the refrigerant flowing out of the radiator. The evaporator is exchanges heat between the refrigerant flowing out of the outside heat exchanger and the air flowing through the radiator. The switching portion switches between a series dehumidifying-heating mode and a parallel dehumidifying-heating mode. The controller is configured to control the switching portion to switch from the parallel dehumidifying-heating mode to the series dehumidifying-heating mode when the amount of the refrigerant oil flowing from the outside heat exchanger to the compressor is insufficient in the parallel dehumidifying-heating mode.

A transportation refrigeration unit (TRU) system is provided and includes a damper assembly configured to direct air flows through first or second pathways and an evaporator disposed in the first pathway, a coil element surrounded by phase change material (PCM) and disposed in the second pathway and a routing assembly configured to direct refrigerant through the evaporator or the coil element. With the PCM pre-cooled, the damper and routing assemblies are controllable to respectively direct the air flows through the first pathway and the refrigerant through the evaporator when first conditions are met and to respectively direct the air flows through the second pathway when second conditions are met.

A thermal management system for a passenger cabin of a hybrid vehicle includes a refrigerant loop in fluid communication with a compressor, a condenser, and a chiller. A main cabin evaporator is in fluid communication with the refrigerant loop. A first valve is configured to regulate refrigerant flow through the main cabin evaporator. A temperature sensor disposed at the main cabin evaporator is configured to output a signal indicative of a main cabin evaporator temperature. An auxiliary evaporator is in fluid communication with the refrigerant loop. A second valve is configured to regulate refrigerant flow through the auxiliary evaporator. A controller is programmed to, in response to the main cabin evaporator temperature being less than a threshold while the main cabin evaporator is operated with the second valve closed, open the second valve to cycle refrigerant through the auxiliary evaporator to increase the main cabin evaporator temperature.

There is disclosed a vehicle air conditioner device of a so-called heat pump system to accurately perform efficient and comfortable heating of a vehicle interior. The vehicle air conditioner device includes a heating medium circulating circuit 23 which heats air to be supplied from an air flow passage 3 to a vehicle interior. A controller calculates a required heating capability TGQhtr of the heating medium circulating circuit to complement a shortage of an actual heating capability Qhp to a required heating capability TGQ of a radiator 4. The controller calculates a decrease amount ΔQhp of the actual heating capability Qhp from a difference ΔTXO between a refrigerant evaporation temperature TXO of an outdoor heat exchanger 7 and a refrigerant evaporation temperature TXObase in non-frosting, and adds the decrease amount ΔQhp to the required heating capability TGQhtr to execute the heating by the heating medium circulating circuit.

A system may include a compressor, a first heat exchanger, a first working fluid flow path, and a second working fluid flow path. The first heat exchanger receives working fluid discharged from the compressor. The first working fluid flow path may receive working fluid from the first heat exchanger and may include a second heat exchanger and a first control valve that is movable between a first position allowing fluid flow through the second heat exchanger and a second position restricting fluid flow through the second heat exchanger. The second working fluid flow path may receive working fluid from the first heat exchanger and may include a third heat exchanger and a second control valve that is movable between a first position allowing fluid flow through the third heat exchanger and a second position restricting fluid flow through the third heat exchanger.