An Automobile Heating, Ventilating and Air Conditioning (HVAC) System with a Neural Network for Controlling the Thermal Sensations Felt by a Passenger.

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  • Automobile Heating Ventilating and Air

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Abstract

The purpose of this study is to develop a heating, ventilating and air conditioning(HVAC)system for automobiles which can control the interior environment according to thermal sensations felt by humans and to evaluate the effectiveness of this HVAC system. The facial skin temperature of a passenger was estimated from environmental information, that is air temperature, wind velocity, etc., with a neural network, and the thermal sensation felt by the passenger was calculated from the facial skin temperature. Thus, this HVAC system can estimate the thermal sensation level without the direct measurement of passenger's skin temperature. The passenger's facial skin temperatures calculated by the neural network were stored in a memory IC, and the memory IC was built into the automobile. When the NN was used for retrieving the facial skin temperature of a passenger, the stored result was provided by the memory IC. This HVAC system was capable of controlling the interior environment according to the thermal sensation of the passenger, thus maintaining the passenger's level of comfort.. The passenger was more comfortable with our HVAC system than with the conventional automobile air conditioner, in particular, just after the passenger gets into the automobile. When driving the automobile on the road, this HVAC system also controls the interior environment to maintain the comfort level of the passenger.

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