Device for regulating the combustion air of a furnace, especially with oil- or gasburner and blower for heating installations
AssigneeDanfoss A/S
InventorJorgen Hartvig Petersen
Life of this patent
Estimating the term…
Abstract
The invention relates to a furnace type air throttle assembly which operates in a manner to supply a constant volume of air per unit time. This is done with a bellows and throttle arrangement in which (1) the total pressure at the inlet, which is the sum of the dynamic and static pressure, is utilized to expand the bellows and move the throttle in a closing direction and (2) static pressure and weight means are utilized to compress the bellows and move the throttle in the opening direction.
Claims8
A furnace type air throttle assembly having automatic volume control comprising, a conduit having entrance and outlet ends, a chimney at said outlet end of said conduit, blower and oil burner units at said outlet end of said conduit upstream from said chimney, a bellows in said conduit at said entrance end, said bellows having an attached end and a free end, plate means attached to said free end, a housing in said conduit surrounding said bellows, pivot means in said housing, said plate means being attached to said pivot means, carrier arms attached to said pivot means exteriorly of said housing, a movable throttle element attached to said carrier arms, a wall dividing said conduit to form first and second channels with said first channel being adjacent said housing, passage means from said inlet end to the interior of said bellows for communicating thereto the total pressure from said inlet end, said first passage having a cross section reduction followed by a cross section enlargement, and an opening in said housing in the region between said reduction and enlargement for communicating the static pressure of said region to the interior of said housing.
Dependencies are inferred from the claim text.