Environmental condition control system

Automatic temperature and humidity regulation – With timing element – Timer other than clock

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Details

165 12, 236 91R, 337301, F23N 520, G05D 2300

Patent

active

041565029

ABSTRACT:
The efficiency of an environmental control system such as a heating, ventilating and air conditioning system is enhanced and energy is conserved by starting and stopping the heating or air conditioning modes of operation at variable times at the beginning and end of an occupancy period, which times are a function of an environmental condition, such as outside temperature in the case of heating and inside temperature in the case of air conditioning. To this end a control system is provided which generates an output for initiating and terminating the operation of the conditioner. Separate intervals during which the generation of the variable output for initiating the operation of the conditioner and for terminating the operation thereof are established as by means of an arrangement of cams driven by a timer motor which runs during these intervals. The variable output may be provided by a switch mounted on an arm of a pneumatic-mechanical feedback system which changes the position of the arm and the instant of time when the cam can actuate the switch as a function of an environmental condition such as the inside temperature or the outside temperature, a pneumatic signal proportional to which is applied to the feedback system.

REFERENCES:
patent: 2528766 (1950-11-01), Marcellus
patent: 2832870 (1958-04-01), Kucera

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