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From the era of thermostats and relay sequences to the era of microcomputer control Full automatic operation of rail car air-conditioners using microcomputers is available in the age of microcomputers, which are now in widespread use globally.
Merely powering on the air-conditioner and the controller enables automatic selection of heating or cooling and automatic operation of the microcomputer-controlled air-conditioner.
Year-round Full Automatic Air-Conditioner Control
Supporting the full automatic mode, the system frees the train crew from air-conditioner control (switching to heating or cooling).
It is especially effective when the temperature variation is sharp between seasons.
The automatic decision on the current appropriate operation zone is made based on the temperature, the humidity measured at the return inlet of the unit cooler and the intended preset temperature to control the air-conditioner.
A calculation of the calories required to reach the intended temperature as early as possible is made to control the air-conditioner, based on the pre-programmed basic data of thermal characteristics of the car body and of pull-down characteristics when the air-conditioner is in operation.
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