Abstract:
To substantially reduce inequality in hot combustion flow rates through first and second heat exchanger tubes from a fuel-fired heating appliance burner box connected thereto and internally combusting a fuel/air mixture received therein from a source thereof to create the hot combustion gas, a perforated diffuser member having a non-uniform perforation pattern is provided. The fuel/air mixture is flowed through the perforated diffuser member into the interior of the burner box. The non-uniform perforation pattern of the diffuser member functions to alter relative combustion gas flow rates through the first and second heat exchanger tubes in a manner reducing an undesirable operating temperature differential therebetween.
Abstract:
A hot air generator comprising a handle (12), an elongated nozzle (14), flame generating means (6), a venturi (4), a gas conduit (162) intended to bring a combustible gas into the elongated nozzle (14) and at the flame generating means (6), an air conduit (164) intended for bringing compressed air into the elongated nozzle (14) and downstream from the venturi;characterized in that the generator further comprises a servocontrolled pressure regulator (2) controlling a gas pressure (Pd.g) in the gas conduit (162) depending on an air pressure (Pd.a) in the air conduit (164).
Abstract:
A humidifier is disclosed for use with a forced air furnace in which water flowing in a coiled tube disposed in the exhaust path for waste gas from the combustion chamber is vaporized by heat transfer from the waste gas and transferred in admixture with unvaporized water into a container in the warm air duct of the furnace. The steam humidifies the air while the unvaporized water is separated and returned to the exhaust path of the combustion chamber where it in turn is vaporized and vented to the atmosphere. The heat transfer to the water in the coiled tube is enhanced by a convoluted configuration of the tubing which induces turbulence in the waste gas and/or water. The humidifier is regulated by controls which are response to the flow of air through the furnace as well as to the humidity.
Abstract:
Gas fired air heater for a central heating system comprising a heat exchanger in which are arranged a series of parallel rows of vertical heat exchange tubes, the lower ends of which are connected to a joint burner compartment and the upper ends of which are connected to a joint flue compartment. Two opposite lateral sides of the heat exchanger are connected to air supply and discharge compartments respectively for feeding the air to be heated transversely through the heat exchanger. The lateral air supply and discharge compartments have air inlet and outlet connections at their top and bottom walls only. One of said lateral air compartments is closed at one end and is connected to a fan at the opposite end, whereas at least one end of the other lateral air compartment is connected to a main duct for discharge of the heated air. The heat exchange tubes are grouped in three sections, each of which extends transversely to the direction of flow of the air to be heated and each of which is heated by an individual ribbon type burner. Each section is individually controlled, to which end the individual sections may be connected to the successive stages of a multistage room thermostat set at staggered temperatures.
Abstract:
A heat exchange shell of the type used in home furnaces has a convoluted heat exchange section bounded on its bottom and top, respectively, by a combustion chamber and a flue gas collector. Two half shells are welded together along seams which circumscribe the shell generally in a plane which bisects both the flue gas collector and the combustion chamber. The seam in the intermediate heat exchange section, however, is offset slightly from this plane such that the convoluted wall of each half of the shell is always on only one side of the middle of the seam.