A vehicle thermal management system includes a switching portion that switches between a state in which a heat medium circulates through a heat-medium cooling heat exchanger and a state in which the heat medium circulates through a heat-medium heating heat exchanger with respect to each of an engine heat-transfer portion and a heat-generating device, a flow-rate adjustment portion that adjusts the flow rate of the heat medium for each of a heat-medium outside-air heat exchanger and the engine heat-transfer portion, an air-conditioning requesting portion that makes a cooling request for an air cooling heat exchanger to cool the ventilation air as well as a heating request for an air heating heat exchanger to heat the ventilation air, and a controller that controls an operation of at least one of the switching portion, a compressor, and the flow-rate adjustment portion based on presence/absence of the cooling request and presence/absence of the heating request from the air-conditioning requesting portion.

There is disclosed a vehicle air conditioner device which is capable of continuing air conditioning of a vehicle interior also in a case where a failure occurs in a solenoid valve to change a flow of a refrigerant in each operation mode. A vehicle air conditioner device 1 includes a solenoid valve 17 for cooling, a solenoid valve 21 for heating and a solenoid valve 22 for dehumidifying to switch respective operation modes of the vehicle air conditioner device. A controller changes and executes the respective operation modes of a heating mode, a dehumidifying mode, and a cooling mode. The controller has a predetermined air conditioning mode during failure, and failure detecting means for detecting failure of the solenoid valve. In a case where the failure detecting means detects that the solenoid valves fail in the respective operation modes, the controller selects the air conditioning mode during failure in which vehicle interior air conditioning by the operation mode is achievable, to continue the air conditioning of the vehicle interior.

A vehicle air-conditioning device may achieve comfortable heating of a vehicle interior by starting a compressor, an indoor blower and heat generating means at appropriate timing. The vehicle air-conditioning device includes a compressor which compresses a refrigerant, a radiator disposed in an air flow passage to let the refrigerant radiate heat, a heat absorber which lets the refrigerant absorb heat, and an indoor blower which blows the air through the air flow passage. The vehicle interior is heated by heat radiated from the radiator. The vehicle air-conditioning device includes a heating medium-air heat exchanger of a heating medium circulating circuit disposed in the air flow passage to heat air supplied to the vehicle interior. On a basis of an outdoor air temperature, the timing to start the compressor, the indoor blower and the heating medium circulating circuit is controlled.

Heat pump system for a vehicle and method for controlling same, which can, during mode changing between air heating and conditioning, prevent noise and vibration due to a pressure difference between refrigerants and reduce delay time. Heat pump system comprises a compressor compressing and discharging refrigerant, an indoor heat exchanger in air conditioning case, causing the refrigerant discharge from the compressor to heat the air, a first expansion valve for selectively expanding the refrigerant passed through the indoor heat exchanger, an evaporator in air conditioning case, enabling refrigerant to exchange heat with air evaporating refrigerant, and a controller for controlling the opening degree of the first expansion valve during mode changing between air heating and conditioning, wherein the controller turns off the compressor and gradually opens the first expansion valve to increase the opening degree when the mode is changed from the heat pump mode to the air conditioning mode.

A vehicle heating and cooling system includes a compressor(s) for compressing a fluid in a cycle including at least two compressions, and a control module for controlling the compressor dependent upon an ambient condition. The module controls a power of the compressor by adjusting a motor speed driving the compressor and/or a pressure drop of the fluid moving through expansion devices. The pressure drop is controlled by changing a size of an opening in the expansion devices. A related method includes compressing a fluid in a first and a second compression cycle, determining an ambient temperature, sensing a temperature of the fluid outlet from a first heat exchanger, sensing a temperature and a pressure of the fluid outlet from a second heat exchanger, calculating a desired power of the compressor based thereon, and adjusting a parameter of the compressor dependent upon the calculated desired power of the compressor.

The present disclosure provides a heat pump system for a vehicle having a first heat source. The heat pump system includes: a first heat exchanger; a second heat exchanger; a primary loop through which coolant circulates, the primary loop passing through the first and second heat exchangers; and a secondary loop through which a refrigerant circulates. In particular, the primary loop includes a flow control device to control the direction and the flow rate of a coolant passing through the primary loop, and a bypassing line through which the coolant selectively bypasses the first heat source in the primary loop. The secondary loop is thermally coupled to the primary loop via the second heat exchanger, and the secondary loop further includes a compressor, an evaporator, and a condenser.

The invention relates to a coolant circulation loop (100) for a motor vehicle comprising a heat-exchange device (120) comprising at least an evaporator (121) and a distribution element (155) controlled to configure the loop in at least a first mode in which the coolant does not pass through the evaporator and a second mode in which the coolant passes through the evaporator.

According to the invention, the loop further comprises at least one thermal energy storage module (160) comprising a material capable of changing phase (163), the storage module being arranged on the passage of the fluid whether the loop is configured according to the first or the second mode.

The present invention relates to a heat pump system for a vehicle, which can independently use waste heat of an engine just as a heat source by separating a heat generation part from a heat absorption part in the heat pump system using a water-cooled condenser, and reduce a length of a loop by separating a high temperature cooling water loop. The heat pump system for a vehicle includes: a first cooling water line for circulating cooling water by connecting a vehicle driving part and a chiller with each other; a second cooling water line disposed in an air-conditioning case for circulating cooling water by connecting a heater core used for heating the interior of the vehicle and a water-cooled condenser with each other; and a valve disposed between the first cooling water line and the second cooling water line. The first cooling water line and the second cooling water line are operated independently if the valve is arranged in a first manner, and the first cooling water line and the second cooling water line are in a serial connection if the valve is arranged in a second manner.

This disclosure discloses a heat pump air-conditioning system and an electric vehicle. The system includes a HVAC assembly, a compressor, and an outdoor heat exchanger. The HVAC assembly includes an indoor condenser, an indoor evaporator, and a damper mechanism. The damper mechanism selectively opens ventilation channels of the indoor condenser and/or the indoor evaporator. An outlet of the compressor communicates to an inlet of the indoor condenser. An outlet of the indoor condenser communicates to an inlet of the outdoor heat exchanger selectively through a first throttle branch or a first through-flow branch. An outlet of the outdoor heat exchanger communicates to an inlet of the indoor evaporator selectively through a second throttle branch or a second through-flow branch. Both an outlet of the indoor evaporator, the outlet of the indoor condenser, and the outlet of the outdoor heat exchanger communicate to an inlet of the compressor.

A vehicle air-conditioning apparatus is provided which is capable of efficiently eliminating or suppressing fogging of a window while comfortably heating a vehicle interior. A controller changes and executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, and a dehumidifying and heating mode to let the refrigerant discharged from the compressor radiate heat in the radiator and let the refrigerant absorb heat in a heat absorber 9. When the temperature of air blown out to the vehicle interior is not capable of reaching a target outlet temperature in the dehumidifying and heating mode, the controller actuates a window heater 35 heating a front window 30 and shifts to the heating mode.