Method and apparatus for controlling ventilation system

Details Method and apparatus for controlling ventilation system Method and apparatus for controlling ventilation system

F - Mech Eng,Light,Heat,Weapons

24

F

F24F 11/02 (2006.01) F24F 7/08 (2006.01) F24F 12/00 (2006.01)

Patent

CA 2596151

An energy recovery ventilation system is described which allows for continuous fan speed control through pulse width modulation of direct current fans. The device described is capable of fine motor speed control without the disadvantages of high noise, low efficiency and a fixed number of speeds present in commonly-used speed- varying techniques used with alternating current (AC) fans. This is accomplished through the use of direct current (DC) fans and pulse width modulation. A controller is used to optimize the ventilation and energy efficiency of the system through the use of several temperature sensors. The device also provides a control process for the self-optimization of the system, should it be detected that the supply and exhaust airflows are unequal. An unbalance is detected by calculating the thermal efficiencies of the exhaust and supply airflows.

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