Interior temperature control principle

1, outside temperature thermistor sensor is generally made ​​when the outside temperature changes its resistance to change. Low temperature resistance, high temperature resistance is smallCompressor control principle2, the interior temperature sensor uses the same thermistor material having a negative temperature coefficient. Generally installed under the dashboard and the air tube to the air conditioning and ventilation tube, when the air flow rapidly through, the resulting vacuum the air led through the interior temperature sensorSchematic flow distribution 3, sunlight Engine Coolant Temperature Sensor is made ​​of light diodes, or cells, for sensing the intensity of sunlight vehicle, but not the temperature. Usually mounted on top of the dashboardEvaporator temperature sensor control circuit 4, the evaporator temperature Crank Sensor is usually installed on the evaporator fins, in order to accurately evaporator temperature sensor, manufactured using the same thermistor having a negative temperature coefficient.Automatic air conditioning work5, the implementing agencyBlower speed control. Conditioning system ECU according to the set temperature, the temperature existing inside, outside temperature, sun (quotations image parameters) strength, temperature and other signals evaporating dish, to send different commands to the blower motor, and to the grounding, thereby controlling the different the blower speed. For some temperature conditioning system, when the engine is started or when the coolant temperature is below a predetermined value, the blower air conditioning system ECU does not work.