A vehicle air conditioner includes a refrigeration cycle unit, a heater core, a cool air bypass passage, an air volume ratio regulator, and an auxiliary heat exchanger. The heater core is disposed in a heating passage located downstream of an evaporator with respect to an airflow. The auxiliary heat exchanger is provided in the refrigeration cycle unit. The evaporator includes a cold energy storage configured to store cold energy. The cold energy storage stores cold energy when the compressor is in operation, and dissipate cold energy while the compressor stops. The auxiliary heat exchanger is located downstream of the evaporator and upstream of the heater core with respect to the airflow. The auxiliary heat exchanger is configured to change enthalpy of refrigerant by heat exchange between the refrigerant and air having been cooled by the evaporator and to be heated by the heater core.

The invention relates to an air conditioning device comprising a refrigerant circuit and a coolant circuit. The refrigerant circuit comprises at least a compressor, an internal heat exchanger, an external heat exchanger and an evaporator The coolant circuit comprises at least a first heat exchanger associated with a first component, a second heat exchanger associated with a second component and a radiator. A fluid/fluid heat exchanger is installed in the refrigerant circuit and in the coolant circuit, with the coolant circuit comprising a first loop and a second loop which are interconnected by an interconnection device. The first loop comprises the fluid/fluid heat exchanger, the first heat exchanger associated with the first component and a means for heating the coolant with the means interposed between the interconnection device and the fluid/fluid heat exchanger, the second loop comprising the second heat exchanger associated with the second component and the radiator.

An air-conditioning system, in particular for a motor vehicle, having a refrigerant circuit, which has an evaporator and a condenser, and a coolant circuit, wherein the refrigerant circuit and the coolant circuit are thermally coupled to each other, in particular in the region of the evaporator and in the region of the condenser, wherein the coolant circuit has a line system having junctions, wherein a heating body, a cooling body, an outside heat exchanger, an additional heat source, a first bypass line, and a second bypass line are integrated into the line system, wherein the first bypass line bypasses the additional heat source from the cooling body to the outside heat exchanger, and/or the second bypass line bypasses the additional heat source from the heating body to the outside heat exchanger.

A heat pump system for air conditioning a vehicle, in particular an electric or hybrid vehicle, includes an air conditioning unit which has an air conditioning evaporator and a heating heat exchanger, for air conditioning a passenger compartment of the vehicle. A condenser transmits heat from a refrigeration circuit into a coolant circuit, and a chiller transmits heat from the coolant circuit into the refrigeration circuit. The coolant circuit has two branches which are parallel to one another downstream of a low temperature cooler, namely a heating branch which can be shut off and in which the condenser and the heating heat exchanger are arranged, and a cooling branch, in which the chiller and a low temperature heat exchanger for cooling a vehicle component are arranged. The low temperature cooler, the condenser and the heating heat exchanger are connected in series with respect to one another. The heat pump system has a plurality of operating modes.

A cooling system (1) that cools an HV apparatus (31) includes a compressor (12) that circulates a refrigerant, a heat exchanger (14) that performs heat exchange between the refrigerant and outside air, an expansion valve (16) that reduces the pressure of the refrigerant, a heat exchanger (18) that performs heat exchange between the refrigerant and air-conditioning air, a cooling portion (30) that cools the HV apparatus (31) using the refrigerant that flows between the heat exchanger (14) and the expansion valve (16), and a gas accumulator (70) that retains a gas-phase refrigerant gasified by heat exchange with the HV apparatus (31) in the cooling portion (30).

A cooling system includes: a compressor; a first condenser; a cooling portion; a heat exchanger; a first line; a second line; a switching device; and an ejector. The first line forms a vapor compression refrigeration cycle by flowing refrigerant in order of the heat exchanger, the compressor, the first condenser and the cooling portion. The second line forms a heat pipe by circulating refrigerant between the first condenser and the cooling portion. The switching device flows refrigerant through the first line when air conditioning is performed, and flows refrigerant through the second line when air conditioning is stopped. The ejector is configured to, when refrigerant flows from the compressor to the first condenser via the ejector, draw refrigerant from the second line and join the drawn refrigerant into refrigerant from the compressor.

A heat pump circuit has the following components when seen in the flow direction: a compressor; a condenser or gas cooler; a first coolant/air heat exchanger as a sub-cooler, via which the coolant dispenses heat; a first expansion element; a first coolant/air heat exchanger, via which the coolant absorbs heat from the ambient air; a second expansion element; and a third coolant/air heat exchanger, via which the coolant absorbs heat from the ambient air. The arrangement of the heat exchanger is in front of the drive engine relative to the travel direction. The danger of the ambient heat exchanger freezing is minimized. With this arrangement

A method for drying an evaporator of a vehicle air conditioner comprises closing an air duct after cooling of the vehicle air conditioner is stopped, operating the heating core and the fan, so as to generate, by means of the heating core and the fan, hot air which can circulate in the air duct. During circulation, the hot air carries away condensed water precipitated on a surface of the evaporator core for conversion into hot and humid air. The method includes directly venting the hot and humid air from the air duct to exterior environment, so that the evaporator core is dried. The method can implement the drying of the evaporator with high-efficiency and low energy consumption.

A rankine cycle system (1), a rankine-refrigeration cycle system (2) and a refrigerated vehicle are disclosed. The rankine cycle system (1) comprises a first evaporator (11), an expander (12), a condenser (13) and a refrigerant pump (14) connected in sequence to form a cycle, wherein the rankine cycle system (1) further comprises an electric heating device (15) connected between the refrigerant pump (14) and the expander (12) for heating the refrigerant. When the rankine cycle system (1) has no waste heat source, the present application can continue to provide energy to the rankine cycle through the electric heating device (15), thereby enabling the expander (12) to continuously and effectively output mechanical work. Even without a waste heat source, the rankine cycle can still operate normally, thus adapting to more operating conditions.

A thermal management system for an electric vehicle includes a coolant loop having a pump configured to circulate a coolant in the coolant loop and one or more valves. A controller is adapted to control respective positions of the one or more valves for modifying the coolant pathway in the coolant loop. The system includes a coolant-to-refrigerant (C2R) heat exchanger fluidly connected to the coolant loop and a refrigerant loop. A low-temperature radiator is located in the coolant loop downstream of the C2R heat exchanger. A coolant heater is positioned in the coolant loop downstream of the low-temperature radiator and a compressor is located in the refrigerant loop. The controller is adapted to minimize energy usage for cabin heating in the electric vehicle by minimizing a respective load of the coolant heater, maximizing the respective load of the compressor, and maintaining a threshold suction pressure for compressor operation.