Automatic control device for direct-coupled type vehicular air conditioner

Abstract

Abstract PURPOSE:To secure an air-conditioning effect in a large-sized autobuses, etc., in an accurate manner, by using a hot-water heating apparatus for a main heating unit as well as using a heat pump type cooling and heating apparatus for cooling and auxiliary mechanisms, while controlling these elements on the basis of a specific control pattern. CONSTITUTION:An air conditioner is provided with a hot-water heating apparatus installing a preheater in a hot-water heating system by cooling water for an engine and a heat pump type cooling and heating apparatus. In this case, an outside temperature signal out of a sensor 30, a room temperature signal out of a sensor 31 and a room temperature setting signal consisting of variable resistance 32 are all inputted into a microprocessor 34 via an A/D conversion circuit 33. And, only when a difference between operating starting time setting temperature and outside temperature as well as a difference between the setting temperature and the room temperature both are within the rising mode range of more than a constant value, air-conditioning apparatuses 36 of both the said heating apparatuses are operated. On the other hand, after stoppage of the heat pump type cooling and heating apparatus, when temperature reaches to the rising mode range again, a heating system of the said apparatus is made so as not to operate at all.

Inventors

• 👤 Yasuyuki Konuki
• 👤 小貫　靖之

Bibliographic Details