A first evaporator cools air-conditioning air. A second evaporator cools an object. A first orifice unit and a second orifice unit are capable of changing a refrigerant amount of the first evaporator and the second evaporator, respectively. A control unit controls both the first orifice unit and the second orifice unit so that a temperature of the second evaporator approaches a target temperature. The control unit, in a first mode, performs control not to evaporate a refrigerant at the first evaporator and to evaporate the refrigerant at the second evaporator. The control unit, in a second mode, performs control to evaporate the refrigerant at both the first evaporator and the second evaporator. The control unit sets the target temperature in a first mode higher than that in a second mode.

Methods and systems are provided for operating a climate control system. In one example, a method for operating a vehicle climate control system includes modeling a temperature in a cabin heating circuit coupled to a heat pump. The method also includes operating the heat pump to deliver thermal energy to a cabin heat exchanger based on the modeled temperature.

Embodiments of the present invention provide a heat recovery system for an electric vehicle (1), comprising first and second switchable heat sources (65, 19) and a control means (20) operable to selectively switch one of the heat sources into thermal communication with a compressor (11) in a thermodynamic cycling system (12), the thermodynamic cycling system being in thermal communication with a heat sink (59, 159); and a detection means (39, 71, T3) operable to detect a temperature differential between each of the switchable heat sources and a fluid entering the compressor; wherein the control means is operable (adapted, arranged) to switch one of the first and second switchable heat sources into thermal communication with the thermodynamic cycling system when a temperature differential is detected between the fluid entering the compressor in the thermodynamic cycling system and the heat available from the switchable heat source, the temperature differential being such that the compressor (11) is operable to upgrade low grade heat from the switchable heat source (65, 19) to a higher grade heat upon operation of the compressor (11).

A refrigeration system includes a generator, a power generation engine, a refrigerator, an electric power converter, an output control unit, and a characteristic estimation unit that estimates a refrigerator characteristic of a refrigerator according to an outside air temperature and a temperature of a cooling target space. The refrigeration system includes an output calculation unit that calculates a drive output as a target drive output that optimizes an energy efficiency of the entire system based on the refrigerator characteristic estimated by the characteristic estimation unit, an engine characteristic of the power generation engine, and a generator characteristic of the generator. Further, the output control unit controls the drive output to approach the target drive output calculated by the output calculation unit.

An air conditioning system of a motor vehicle with a refrigeration circuit and with a coolant circuit. The refrigeration circuit includes a compressor, a refrigerant-coolant heat exchanger operable as a condenser/gas cooler for the heat exchange between the refrigerant and the coolant of the coolant circuit, a first expansion device, and a first refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment. The coolant circuit includes a conveying device, a first coolant-air heat exchanger for heating the intake air for the passenger compartment and the refrigerant-coolant heat exchanger. The refrigeration circuit further includes a second refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment with a second expansion device located upstream in flow direction of the refrigerant. The coolant circuit is formed with a second coolant-air heat exchanger for heating the intake air for the passenger compartment.

A vehicle thermal management system includes a cabin thermal loop, a battery thermal loop, a parallel valve assembly, and a controller. The cabin thermal loop includes a first chiller in fluid communication with a vehicle cabin. The battery thermal loop includes a second chiller in fluid communication with a high-voltage battery. The parallel valve assembly selectively links the cabin and battery thermal loops and includes a three-way valve and a conduit system arranged with one another to selectively link the first chiller and the second chiller to deliver cooling capacity to the battery. The controller is programmed to, responsive to detection. of an available amount of cabin thermal loop cooling capacity exceeding a detected passenger vehicle cabin cooling capacity request, output a command to the parallel valve assembly to release the excess cooling capacity from the cabin thermal loop to cool the HV battery.

A vehicle air conditioner includes: a refrigerant circuit which includes a compressor, an external heat exchanger, an expansion valve, and an evaporator; and a cooling fan. The vehicle air conditioner further includes: a refrigerant temperature detection part; a vehicle environment temperature detection part; and a controller. The refrigerant temperature detection part is configured to determine the temperature of a refrigerant which flows into the expansion valve. The vehicle environment temperature detection part is configured to determine a temperature outside the refrigerant circuit under an installation environment. The controller is configured to control a speed of the cooling fan in a cooling operation time such that a cooling performance with respect to the external heat exchanger is decreased when the temperature difference between a determined refrigerant temperature by the refrigerant temperature detection part and a determined external temperature by the vehicle environment temperature detection part is equal to or less than a first set temperature difference.

A thermal management system includes a refrigerant line including a compressor, a water-cooled condenser, and a cooling core for indoor air conditioning connected to the water-cooled condenser such that refrigerant emerging from the water-cooled condenser is introduced into the cooling core for indoor air conditioning, and a battery line including a high-voltage battery heat exchanging module and a heater core for indoor air conditioning. The battery line is connected to the refrigerant line through the water-cooled condenser in a heat exchangeable manner such that the high-voltage battery heat exchanging module and the heater core for indoor air conditioning are connected in parallel to the water-cooled condenser via a first valve to cause cooling water heated while passing through the water-cooled condenser to be selectively introduced into the high-voltage battery heat exchanging module or the heater core for indoor air conditioning.

This disclosure relates to a vehicle configured to prevent oil entrapment within a refrigerant system of the vehicle. This disclosure also relates to a corresponding method. An example vehicle includes a refrigerant system configured to circulate fluid including a mixture of refrigerant and oil relative to an evaporator, a controller, and an electronic expansion valve upstream of the evaporator. The electronic expansion valve is responsive to instructions from the controller, and the controller is configured to instruct the electronic expansion valve to open to prevent entrapment of oil within the evaporator or refrigerant lines.

There is disclosed a transport refrigeration system comprising an electronically governed engine that drives a refrigeration circuit of the system. The engine control unit is configured to operate the engine in a droop mode of operation, in which the engine speed increases with decreasing engine loads from the refrigeration circuit, so as to maximise the cooling capacity of the system at low engine load conditions.