Modulating burner with venturi damper
AssigneeLochinvar, LLC
InventorsMohamed Mehdi Doura, Benjamin P. Putnam, Dave C. Baese, Robert Wesley Wiseman
Life of this patent
Estimating the term…
Abstract
A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.
Claims19
A burner assembly, comprising:
- a burner;
- a blower upstream of the burner;
- a venturi upstream of the blower;
- a damper valve upstream of the venturi, the damper valve having an open position and a restricted position;
- a smaller gas valve communicated with the venturi;
- a larger gas valve communicated with the venturi in parallel with the smaller gas valve;
- and
- a controller operatively associated with the blower, the damper valve, and the smaller and larger gas valves.
Dependencies are inferred from the claim text.