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An orifice plate for metering a mixture of fuel and air to a blower for supply of the mixture to a burner positioned in a central plenum of a heat exchange system, the present plate further provides the sole sealing structure necessary for sealing conduit members which communicate the blower with a

An orifice plate for metering a mixture of fuel and air to a blower for supply of the mixture to a burner positioned in a central plenum of a heat exchange system, the present plate further provides the sole sealing structure necessary for sealing conduit members which communicate the blower with a fuel regulator. The present orifice plate can be configured with apertures of differing size and number to facilitate field alternation of the heat capacity of the system and to allow rapid conversion of the system to alternate fuels without the need for removing and installing additional sealing structure. The ratio of fuel to air present in the mixture which is burned in the system is controlled by the size and/or number of apertures formed in the orifice plate.

대표청구항 ▼

A heat exchange system for heating air within an enclosure, comprising: a first heat exchanger; a second heat exchanger located a distance from the first heat exchanger and disposed such that air from the enclosure can be moved through the second heat exchanger and returned to the enclosure; a burne

A heat exchange system for heating air within an enclosure, comprising: a first heat exchanger; a second heat exchanger located a distance from the first heat exchanger and disposed such that air from the enclosure can be moved through the second heat exchanger and returned to the enclosure; a burner positioned in the first heat exchanger for supplying heat to the first heat exchanger; means for circulating a fluid from the first heat exchanger to the second heat exchanger and back to the first heat exchanger; means for supplying fuel to the system and terminating in a first plate member; means for directing a fuel/air mixture to the burner for combustion, said means having a second plate member disposed upstream thereof and facing the first plate member, said first and second plate members having fuel and air apertures formed therein; and, a planar sealing member having a first aperture aligned with the fuel apertures formed in the plate members for permitting fuel to move from the supply means to the burner and a second aperture aligned with the air apertures formed in the plate members for permitting air to enter the mixture directing means and to mix with the fuel as the fuel moves to the burner, the planar member being disposed between the plate members and acting to meter and to allow mixing of air and fuel, the planar member being mechanically deformable by the plate members to form a seal between said plate members, the planar member being the only seal between the plate members, the planar member further functioning to allow flow of predetermined quantities of air and fuel to the burner.