A system for automatically controlling a defog/defrost function of a vehicle climate control system includes a controller configured to calculate an ambient dew point temperature value from a plurality of inputs received from a sensor array. The controller is further configured to set a condensation indicator if a calculated difference between a window exterior surface temperature value input received from the sensor array and the calculated ambient dew point temperature value is less than or equal to a predetermined threshold value. The controller actuates the vehicle climate control system defog/defrost function and/or a window wiper system in response to the set condensation indicator.

A vehicular air conditioning device includes a blower, a heating heat exchanger, an auxiliary heater, and a blower controller. The heating heat exchanger heats blown air by exchanging heat between the blown air and the cooling water of the in-vehicle device emitting heat during operation. The blower controller is configured to control the operation of the blower. The blower controller is configured to increase a blowing capacity of the blower with increase of a temperature of the cooling water. The blower controller, during operation of the auxiliary heater, increases the blowing capacity after a waiting time during which the increase of the blowing capacity is prohibited has elapsed since a start-up switch of a vehicle system is turned on. The vehicular air conditioning is capable of implementing a quick warming of the in-vehicle device without impairing the heating feeling of occupant.

The invention relates to a method for operating an air conditioning system for a vehicle including the steps of: calculating a water collection quantity in an evaporator during the operating period of a cooling mode of the air conditioning system, calculating a quantity of drainage water from the evaporator, determining a quantity of water present in the evaporator at a certain point in time, and comparing the determined quantity of water in the evaporator with a predetermined limit value at the point in time of starting the vehicle or at the point in time of starting the ventilation mode of the air conditioning system. The cooling mode of the air conditioning system is activated if the limit value is exceeded and otherwise the ventilation mode of the air conditioning system is activated.

Methods, systems, and apparatus for a control system that improves defroster performance in a vehicle by reducing rear heater core heat rejection to increase heat availability to the defroster. The control system includes a rear heating, ventilation and air conditioning (HVAC) unit configured that moves air into the vehicle. The control system 100 includes a memory for storing multiple blower maps. The control system includes an electronic control unit connected to the rear HVAC unit and memory. The electronic control unit is configured to determine a mode for a front HVAC. The electronic control unit is configured to obtain from the memory a blower map for the rear HVAC unit from the multiple blower maps based on the mode. The electronic control unit is configured to determine an airflow rate for the air based on the obtained blower map and control an amount of air outputted.

A cooling and heating system for a motor vehicle comprises a heat pump, a controller, a low temperature radiator in thermal communication with the heat pump, a passenger cabin heat exchanger in thermal communication with the heat pump, and a defrost system comprising a bypass coolant loop in selective fluid communication with the low temperature radiator. When in the heating mode, the controller opens a solenoid valve and activates a coolant heater in the bypass coolant loop upon detecting operation of the heat pump outside of a predetermined normal operating range and upon detecting an ambient temperature below a predetermined temperature. The controller de-activates the coolant heater upon detecting operation of the heat pump within the predetermined normal operating range. The controller may also de-activate close the solenoid upon detecting operation of the heat pump within the predetermined normal operating range.

An air-conditioning device includes: a compressor; an outdoor heat exchanger; an evaporating unit configured to evaporate refrigerant a heater unit configured to heat the air by using the heat of the refrigerant a liquid receiver arranged at the downstream side of the outdoor heat exchanger and a restrictor mechanism provided between the heater unit and the outdoor heat exchanger, wherein, in an operation state in which the flow of the refrigerant is restricted by the restrictor mechanism and heat is released in the heater unit, a first operation mode and a second operation mode are switched, the first operation mode being set such that the liquid-phase refrigerant is stored in the liquid receiver and the gaseous-phase refrigerant is guided to the compressor and the second operation mode being set such that the liquid-phase refrigerant stored in the liquid receiver is guided to the evaporating unit.

A humidity detector a humidity sensor detecting a relative humidity of an air inside a sensor case housing the humidity sensor. The humidity detector has an air volume obtaining section, a flow direction obtaining section, a setting section, and a correction section. The air volume obtaining section obtains air volume information correlated with an air volume of the air flowing around the humidity sensor. The flow direction obtaining section obtains flow direction information correlated with a flow direction of the air flowing around the humidity sensor. The setting section sets correction factors configuring a dynamic compensator based on the air volume information and the flow direction information. The dynamic compensator compensates for a response delay of the humidity sensor. The correction section corrects a detection value, which is detected by the humidity sensor, by using the dynamic compensator to obtain the relative humidity of the air.

There is provided with a moving body control apparatus. An image capturing unit captures a periphery of a moving body through a transmitting portion. A heater is capable of heating the transmitting portion. An air-conditioning unit switches an air-conditioning state in the moving body between an inside air circulation state and an outside air introduction state. A control unit controls the heater. The control unit increases an output of the heater during the operation in the case in which the air-conditioning state is set to the inside air circulation state so that the output of the heater will be larger than the output of the heater in the case in which the air-conditioning state is set to the outside air introduction state.

There is provided with a moving body control apparatus. An image capturing unit captures a periphery of a moving body through a transmitting portion. A heater is capable of heating the transmitting portion. An air-conditioning unit switches an air-conditioning state in the moving body between an inside air circulation state and an outside air introduction state. A control unit controls the heater. An ambient temperature detection unit detects an ambient temperature. The control unit starts the operation of the heater when the ambient temperature is not more than a predetermined temperature threshold. The predetermined temperature threshold of the case in which the air-conditioning state is set to the inside air circulation state is higher than the predetermined temperature threshold in the case in which the air-conditioning state is set to the outside air introduction state.

A defrosting control system includes processing circuitry. The processing circuitry calculates a frost formation rate, indicating a frost formation amount of a windowpane on which frost is formed at an estimated departure time of a vehicle, based on frost formation information and the estimated departure time. The processing circuitry calculates an operation period of a defroster needed to remove frost from the windowpane based on the frost formation rate. The processing circuitry determines that an activation time of the defroster is a time earlier than the estimated departure time by the operation period. The processing circuitry transmits an operation request signal for starting operation of the defroster at the activation time.