Method and apparatus for measuring airflows in HVAC systems

Automatic temperature and humidity regulation – Ventilator type – Electrically actuated

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454229, 55471, F24F 700

Patent

active

060796278

ABSTRACT:
The present invention includes a method and apparatus for accurately measuring airflow across a measuring location within a heating, ventilation, and air conditioning system. The method includes the steps of measuring airflow at the measuring location using a plurality of airflow measuring stations of equal or different sizes, the sizes of the measuring stations together equaling the size of the measuring location. Control dampers are associated with each respective station to modulate the airflow through each measuring station based upon the flow condition across the measuring location. The apparatus providing for the method includes differential pressure transducers located in each airflow measuring station. These pressure transducers are connected with the dampers via a control unit which changes the position of the dampers in accordance with the airflow condition. The measuring locations can be adjacent an outdoor air inlet, a partial return air inlet, or heating and cooling coils of a heating, ventilation, and air conditioning unit.

REFERENCES:
patent: 2244551 (1941-06-01), Crawford
patent: 4043196 (1977-08-01), Trageser
patent: 4086781 (1978-05-01), Brody et al.
patent: 4392417 (1983-07-01), Johannsen
patent: 5791408 (1998-08-01), Seem
patent: 5862982 (1999-01-01), Federspiel
patent: 5976010 (1999-11-01), Reese et al.

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