miljoestyringssystem to a cellelignende stables, in particular a promote pig

摘要

Environment control system for a room-like life-stock house, especially for pigs, which room (1) has on one side a wall (3) with a movable air supply valve (5) in the upper part thereof and in a wall located at some distance from said wall an air discharge fan (7) in the upper part of the room, the momentary capacity of the fan and the momentary transmission of the air supply valve being controlled by a micro-processor (11) in dependence on the temperature in the room, wherein two temperature sensors (8, 10) are located in the room of which one (8) is closer to the wall with the air supply valve and the other (10) is closer to the fan, which temperature sensors each generate an electrical signal for controlling the micro-processor in such manner that the average value of both the two control signals determines the desired position of the air supply valve and the desired capacity of the fan, whereby a possibly occuring variation of the difference of both the control signals corrects the position of the air supply valve in such manner that the variation of the difference of both control signals which has occured is compensated.