The invention relates to a method for controlling a thermal conditioning circuit (100) for thermally conditioning an air flow (1), notably intended for a motor vehicle interior (2), the circuit comprising a heat exchanger (4) configured to have a refrigerant pass through it and exchange heat with the air flow (1), the heat exchanger (4) being configured to operate selectively in at least:—a mode known as cooling mode,—a mode known as heating mode, the method comprising the steps of:—evaluating a level of humidity in a region in contact with an exterior surface (5) of the heat exchanger (4),—detecting an instruction to switch from cooling mode to heating mode,—if the evaluated level of humidity is below a predetermined first threshold (s1), allowing refrigerant to circulate through the exchanger (4) in response to the instruction to switch to heating mode,—if the level of humidity is above a predetermined second threshold (s2), preventing the refrigerant from circulating through the exchanger (4) for a first predetermined length of time (D1), so as to delay the switch to heating mode.

A vehicle air-conditioning device includes a compressor, a heating unit, an outside air heat exchanger, a wind speed regulation unit, and a controller. The heating unit includes a heating heat exchanger and heats ventilation air supplied to a space to be air conditioned using a high-pressure refrigerant as a heat source. The wind speed regulation unit regulates a wind speed of air supplied to the outside air heat exchanger. The control unit performs, as a defrosting operation of defrosting the outside air heat exchanger, a dry defrosting mode for evaporating and removing frost adhering to the outside air heat exchanger in a state where the outside air is at a low temperature. In the dry defrosting mode, the controller causes the wind speed regulation unit to supply air to the outside air heat exchanger at a wind speed in a range determined to promote evaporation and removal of frost.

A control method of a heat pump system for a vehicle includes a first cooling apparatus having a first radiator, a first water pump, an electrical component, a valve, and a branch line, which are connected by a first coolant line and circulate a first coolant by the first water pump to the electrical component; a second cooling apparatus including a second radiator and a second water pump connected by a second coolant line; and an air conditioning apparatus including a compressor, a heater, an expansion valve, and a heat exchanger which are connected by a refrigerant line circulated with a refrigerant.

A refrigerant cycle device includes a compressor, a radiator, a first expansion valve, a second expansion valve, a first evaporator, a second evaporator, and a controller. The controller is configured to switch between a first evaporator priority control and a second evaporator priority control. During the first evaporator priority control, the controller controls a throttle opening of the second expansion valve based on at least one of a temperature of a first evaporator, a temperature of a refrigerant flowing through the first evaporator, and a temperature of an air having exchanged heat in the first evaporator. During the second evaporator priority mode, the controller controls the throttle opening based on a refrigerant state of the second evaporator. When the at least one of the temperatures is equal to or greater than a switching temperature, the second priority mode is switched to the first priority mode.

A method for thermal management of a motor vehicle includes circulating of coolant, in a first operating state, at least in a motor cooling circuit through a series circuit that includes a motor circuit pump, an electric motor, and an LT radiator where the motor circuit pump is activated and where the coolant flows in a first direction through the LT radiator. The method further includes, time-shifted with respect to the first operating state, circulating of coolant, in a second operating state, at least in a chiller cooling circuit through a series circuit including a chiller, a chiller section pump, the motor circuit pump, and the LT radiator where the chiller section pump is activated, where the motor circuit pump is deactivated, where the coolant flows in a second direction through the LT radiator, and where the second direction is opposed to the first direction.

A heat pump system for a vehicle, capable of heating up or cooling a battery module by use of a single chiller in which a refrigerant and a coolant exchange heat, simplifying the system, includes: first and second cooling apparatuses; and a battery module, wherein a main heat exchanger provided in an air conditioning apparatus is connected to each of the first and second coolant lines to enable the coolants circulating in the first and second cooling apparatuses to pass therethrough, and a refrigerant passing through the main heat exchanger is selectively condensed or evaporated depending on a vehicle mode through mutual heat exchange with the coolant supplied from one of the first coolant line and the second coolant line, or the coolants supplied through the first and second coolant lines, respectively.

The present disclosure provides a heat pump system for a vehicle and a control method thereof. The heat pump system for the vehicle includes a cooling apparatus, which includes a radiator and a water pump connected by a coolant line and circulating a coolant in the coolant line to cool at least one heating element provided on the coolant line. The heat pump system further includes a branched line including one end connected to a valve on the coolant line between the radiator and the heating element and the other end connected to the coolant line between the radiator and the water pump. The heat pump system further includes an air conditioner device circulating a refrigerant along the refrigerant line to adjust an indoor temperature of the vehicle.

A temperature-robust polymer shroud for a roller bearing seal includes a shroud body and an inner diameter leg defining respective portions of a single continuous part. The shroud body encircles a rotation axis of the polymer shroud and extends predominantly in directions orthogonal to the rotation axis from an inner diameter to an outer diameter. The inner diameter leg connects to the shroud body at the inner diameter and encircles the rotation axis, wherein, along the entire inner diameter of the shroud body, the inner diameter leg is oriented at an oblique angle to the rotation axis to extend both (a) radially inward from the inner diameter and (b) axially away from the inner diameter along a first direction parallel to the rotation axis. A roller bearing seal includes a seal case, an elastomer lip, and the temperature-robust polymer shroud.

A cooling and battery cooling mode is performed to release the heat from the refrigerant in a heat releasing unit and an outdoor heat exchanger and to absorb the heat into the refrigerant in a heat absorbing unit and a refrigerant-heat medium heat exchanger, and a heating and battery cooling mode is performed to release the heat from the refrigerant in the heat releasing unit and to absorb the heat into the refrigerant in the outdoor heat exchanger and the in-vehicle device heat exchanger. In a case where the cooling and battery cooling mode is performed, when a temperature of the heat absorbing unit is lower than a target value of the temperature of the heat absorbing unit even though the flowing of the refrigerant into the heat absorbing unit is blocked, the operation mode is moved to the heating and battery cooling mode.

A vehicular thermal management system includes: an indoor-air-conditioner disposed in a first vehicle body having a passenger space and including a compressor, a first condenser, an evaporator, a blower, and a refrigerant line; and a component-air-conditioner disposed in a second vehicle body combinable with the first vehicle body and including an electrical component line for cooling an electrical component of the vehicle and a first battery line for cooling a high-voltage battery including a chiller which extends toward the first vehicle body to be disposed behind the evaporator when the first vehicle body is combined with the second vehicle body.