摘要:
A manifold (18) for a heat exchanger (14) includes a rear wall (76) provided with inlet and outlet ports (78, 82), a front wall (86) provided with a water inlet (90) and a water outlet (94), and a web (98) extending between the front and rear walls (76, 86) and arranged such that water entering through the water inlet (90) communicates only with the outlet ports (82) and water entering through the inlet ports (78) communicates only with the water outlet (94).
摘要:
A combustion air inlet pipe for a water heater includes an inlet end (46) having a longitudinal axis, and a plate (82) in the combustion air inlet pipe adjacent the inlet end (46), which plate (82) extends outwardly of the inlet end (46) along the longitudinal axis.
摘要:
A combustion apparatus comprises a combustion chamber (12) having distally opposite first and second end walls (14, 16), and having a sidewall (18) extending between said end walls (14, 16), a cover (24) external to said combustion chamber (12) and covering said first end wall (14) and defining a buffer space (26) therebetween, one or more penetrations extending through said first end wall (14) between said buffer space (26) and said combustion chamber (12), a blower (32) external to said cover (24) and supplying air to said buffer space (26) and pressurizing said buffer space (26) to a higher pressure than said combustion chamber (12) such that leakage at said one or more penetrations flows from said buffer space (26) into said combustion chamber (12).
摘要:
A water heater comprising a tank (14) including an outer surface (26), and including an inner surface (18) defining a water chamber (22), an electrical component (30) extending outwardly of the outer surface (26) of the tank (14), an outer jacket (34) surrounding the tank (14) and having therein an opening (38) affording access to the electrical component (30), a door (46) which is mounted on the outer jacket (34) and which covers the opening (38), a dam (70) which is located within the opening (38) and surrounds the electrical component (30), which extends between the tank (14) and the outer jacket (34), and which includes a portion extending between the door (46) and the outer jacket (34), and insulating material (42) located between the tank (14) and the outer jacket (34) and outside of the dam (70).
摘要:
A gas-fired water heater including a tank (1) to contain water to be heated and a flue (9) extending axially through the tank (1). A burner (8) is located at the lower end of the flue (9) and has a smaller cross sectional area than the flue to provide an annular space between the burner (8) and the lower end of the flue (9). The burner (8) has at least one outlet port (26) that directs a flame pattern in proximate relation to the lower end of the flue (9). A locator assembly (62) supports the burner from the flue and positions the burner axially of the flue.
摘要:
A water heater includes a sealed combustion chamber and one or more fans for raising pressure in the combustion chamber to increase efficiency of the water heater. The pressure permits a more restrictive baffle to be used in the flue compared to baffles used in atmospheric water heaters. The water heater may include a water temperature sensor that activates the fan without activating the burner if water temperature raises above a desired temperature. The water heater may also include pressure and vapor sensors to ensure the combustion chamber is properly sealed and there are no flammable vapors present prior to igniting the bumer. The fans are relatively small and run off the same DC power that runs an electric gas valve. The fans may be, for example, 12 or 24 Volt fans with power inputs of about 10 Watts or less.