A vehicle air conditioning apparatus is provided that can prevent temperature variations of the air after the heat exchange in a radiator to reliably control the temperature of the air supplied to the vehicle interior. During the heating operation and the heating and dehumidifying operation, target degree of supercooling SCt when target air-blowing temperature TAO is a predetermined temperature or higher is set to SCt1 that is greater than SCt2 when the target air-blowing temperature TAO is lower than the predetermined temperature. When amount of air Ga supplied from indoor fan 12 is lower than a predetermined value, the target degree of supercooling SCt is corrected, which is set such that the degree of supercooling is lower than target degree of supercooling corrected when the amount of air Ga supplied from the indoor fan 12 is a predetermined value or higher.

A vehicle air conditioning apparatus is provided that can prevent temperature variations of the air after the heat exchange in a radiator to reliably control the temperature of the air supplied to the vehicle interior. During the heating operation and the heating and dehumidifying operation, target degree of supercooling SCt when target air-blowing temperature TAO is a predetermined temperature or higher is set to SCt1 that is greater than SCt2 when the target air-blowing temperature TAO is lower than the predetermined temperature. When amount of air Ga supplied from indoor fan 12 is lower than a predetermined value, the target degree of supercooling SCt is corrected, which is set such that the degree of supercooling is lower than target degree of supercooling corrected when the amount of air Ga supplied from the indoor fan 12 is a predetermined value or higher.

Methods and systems are provided for adjusting engine operating parameters to regulate condensate formation in a charge air cooler. Based on conditions conducive to condensate formation, one or more of throttle valve position, active grille shutter opening and compressor speed may be regulated in order to decrease dew point temperature and condensation at the charge air cooler.

A heating, ventilation, and air-conditioning device includes: a heating part disposed in a windshield glass of a vehicle and configured to heat the windshield glass; a collection part configured to collect state information on a state of the windshield glass and environment information on internal and external environments of the vehicle; and a control part. The control part is configured to determine a defrosting or dehumidifying mode for the windshield glass based on the state information or the environment information collected by the collection part and to control an operation of the heating part depending on the determined defrosting or dehumidifying mode.

A vehicle air conditioning system includes: an air conditioning duct through which air flows; a humidity controlling device disposed in the air conditioning duct; a heat pump cycle including a condenser disposed in the air conditioning duct on a downstream side of the humidity controlling device; and a control unit for controlling the humidity controlling device and the heat pump cycle in response to an operation mode. The control unit comprises a warm-up mode in which the air is heated by the humidity controlling device at the start of a heating operation mode of the heat pump cycle.

A thermal system includes a high temperature coolant loop thermally coupled to a heater core configured for thermal exchange with an airflow into a cabin of the vehicle, and an air conditioning (A/C) loop having a compressor, a condenser, a first expansion device for a heat exchanger, a second expansion device for a chiller, and a third expansion device for an evaporator. The high temperature coolant loop is thermally coupled to the condenser. A controller includes one or more processors and is programmed to perform a window fogging prevention operation by controlling a speed of the compressor such that (i) a coolant temperature at the heater core reaches a first predetermined target temperature, and (ii) a coolant temperature at the evaporator does not fall below a second predetermined target temperature.

A vehicular heat management system is disclosed and is configured to minimize high-pressure/high-temperature movement path sections in a refrigerant movement path extending from a compressor to a chiller and a refrigerant movement path extending from the compressor to a vehicle interior cooling heat exchanger. The system includes: a heat pump type refrigerant circulation line including a compressor, a high-pressure side heat exchanger, an outdoor heat exchanger, a chiller connected in series or in parallel to the outdoor heat exchanger, and a vehicle interior cooling heat exchanger connected in series or in parallel to the outdoor heat exchanger; and a refrigerant control part configured to, in a heat pump mode, depressurize and expand a refrigerant on the compressor side and selectively allow the refrigerant to flow toward at least one of the outdoor heat exchanger, the chiller and the vehicle interior cooling heat exchanger depending on an air conditioning condition.

A method for controlling a refrigeration system of a vehicle includes a circuit containing a refrigerant, a compressor, and first and second evaporators which are connected in parallel to the compressor, and a first expansion valve arranged upstream the first evaporator that regulates a pressure drop of the refrigerant before the first evaporator, and a second expansion valve arranged upstream the second evaporator that regulates a pressure drop of the refrigerant before the second evaporator, and a condenser arranged downstream the compressor between the compressor and the first and second expansion valves. The method includes controlling a total opening of the first expansion valve and the second expansion valve, based on a temperature and a pressure of the refrigerant which refrigerant temperature and refrigerant pressure are measured downstream the first and second evaporators at a position between the first and second evaporators and the compressor.

Methods and systems are provided for managing cabin conditions. A fogging metric and a breath temperature metric are determined. A control signal response is generated based on the fogging metric and the breath temperature metric. The system facilitates modification to the operation control of the at least one climate control device based on the control signal response.