Standing pilot furnace with vented vestibule
First Claim
1. An induced draft, fuel-fired furnace having a heat exchanger with an inlet and an outlet, said furnace comprising:
- a vent having an inlet;
a burner;
a vented vestibule in fluid communication with said vent;
a blower having an inlet in fluid communication with the heat exchanger outlet, and an outlet disposed at the inlet of said vent, said blower outlet having a cross-sectional area smaller than said vent inlet, said vent inlet and blower outlet defining a vent inlet opening; and
a standing pilot disposed in said furnace such that combustion products produced thereby are in fluid communication with said vent inlet opening, said standing pilot adapted to ignite fuel operably discharged from said burner.
7 Assignments
0 Petitions
Accused Products
Abstract
An induced draft, fuel-fired furnace having a heat exchanger with an inlet and an outlet includes a vent having an inlet, a burner, and a vented vestibule in fluid communication with the vent. A blower has an inlet in fluid communication with the heat exchanger outlet, and an outlet disposed at the inlet of the vent. The blower outlet has a cross-sectional area smaller than the vent inlet. The vent inlet and blower outlet define a vent inlet opening. A drafthood formed with an inlet is disposed in the vestibule and forms a plenum in fluid communication with the vent inlet opening. A source of combustion products is disposed in the furnace such that combustion products produced thereby are in fluid communication with the drafthood inlet and vent inlet opening. The source of combustion products includes either a standing pilot or electronic ignitor for igniting fuel operably discharged from the burner.
-
Citations
26 Claims
-
1. An induced draft, fuel-fired furnace having a heat exchanger with an inlet and an outlet, said furnace comprising:
-
a vent having an inlet; a burner; a vented vestibule in fluid communication with said vent; a blower having an inlet in fluid communication with the heat exchanger outlet, and an outlet disposed at the inlet of said vent, said blower outlet having a cross-sectional area smaller than said vent inlet, said vent inlet and blower outlet defining a vent inlet opening; and a standing pilot disposed in said furnace such that combustion products produced thereby are in fluid communication with said vent inlet opening, said standing pilot adapted to ignite fuel operably discharged from said burner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An induced draft, fuel-fired furnace, comprising:
-
a heat exchanger having an inlet and an outlet; a vent including an inlet and a venturi section; a burner; a vented vestibule in fluid communication with said vent; a blower having an inlet in fluid communication with said heat exchanger outlet and an outlet in fluid communication with said vent inlet; and a standing pilot disposed in said furnace such that combustion products provided thereby are in fluid communication with said venturi section, said standing pilot adapted to ignite fuel operably discharged from said burner. - View Dependent Claims (13, 14)
-
-
15. An induced draft, fuel-fired furnace, comprising:
-
a heat exchanger having an inlet and an outlet; a vent having an inlet; means for providing an area of lower pressure, said providing means defined at least in part by said vent; a vented vestibule; a burner disposed within said vestibule and in fluid communication with said heat exchanger inlet and said area of lower pressure; an induced draft blower having an inlet disposed in fluid communication with said heat exchanger outlet and an outlet disposed in fluid communication with the inlet of said vent; and means for igniting fuel operably discharged from said burner. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An induced draft, fuel-fired furnace, comprising:
-
a vent having an inlet; a vented vestibule disposed in fluid communication with said vent, said vestibule comprising a plurality of panels; a blower having an inlet in fluid communication with the heat exchanger outlet, and an outlet disposed at the inlet of said vent; a drafthood disposed in said vestibule, said drafthood forming a plenum in fluid communication with said vent and including an inlet, said drafthood in fluid communication with an aperture formed in one of said vented vestibule panels, said drafthood including an undersurface formed with an inlet, and a blocked vented detecting means adapted to detect a blocked exhaust gas flow condition in said vent; a burner disposed in said furnace and in fluid communication with said drafthood inlet; and means for igniting fuel operably discharged from said burner. - View Dependent Claims (25, 26)
-
Specification