46results about "Flue gas duct system" patented technology

A heating apparatus can have a sealed combustion chamber, a burner, and various air channels to direct air into the sealed combustion chamber and to provide heated air to the desired area or environment such as an interior room. A channel can direct a flow of air along a face of the sealed combustion chamber to cool the face. The channel can be within or outside of the sealed combustion chamber. Alternatively, or in addition, the heating apparatus can be capable of operating as a direct vent device or as a vent free device.

A drafthood assembly for inclusion within a vent stack for a direct venting stove or fireplace, converting the direct venting stove or fireplace for use with a natural venting flue. The assembly includes an air intake section for feeding ambient room air into the combustion chamber and an exhaust gas section for feeding ambient room air into the products of combustion that are exhausted from the combustion chamber in order to cool the exhaust gas products so that a B-vent type flue can be used to carry the exhaust gas products out of the dwelling.

An exhaust adapter secures an exhaust tube relative to an exhaust pipe. The exhaust adapter is formed to have an annular shape enclosing a through hole, and is mounted on the outer peripheral surface of the exhaust tube and on the inner peripheral surface of the exhaust pipe by inserting the exhaust tube into the through hole. When the exhaust adapter is being fitted on the outer peripheral surface of the exhaust tube, the inner peripheral surface of the exhaust adapter presses the outer peripheral surface of the exhaust tube, and when the exhaust adapter is being fitted on the inner peripheral surface of the exhaust pipe, the outer peripheral surface of the exhaust adapter presses the inner peripheral surface of the exhaust pipe.

The present invention relates to a control method of preventing backflow of exhaust gas of a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, and the control method includes: measuring wind pressures of air flowing into the combustion chambers using the wind pressure sensors in the controller of boilers that are in operation; and calculating the average wind pressure of the boilers that are in operation in response to information about the wind pressures measured by the controllers of the boilers that are in operation, using the master controller, determining the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operating the fan of the boilers that are not in operation on the basis of the determined results. According to the method, it is possible to provide a multi-boiler or a multi-water heater that does not generate additional cost for installing the dampers are not needed and does not substantially breakdown due even though it is used for a long period of time, thereby saving cost for maintenance.

A heat exchange system and method for heating outside air provided to a structure are disclosed. The system uses and recovers heat from waste products that are being exhausted from the structure. A heated products source generates heated waste products as a result of combustion. An exhaust duct passes the heated waste products through a heat exchanger before exhaustion from the structure. An intake duct that supplies fresh outside air to the structure also passes through the heat exchanger. The heat exchanger couples the exhaust duct and the intake duct and transfers otherwise unused heat from the waste products to the outside air to increase the overall efficiency of the heated product source.

A common, side-wall, Category III or Category IV-vented gaseous fuel-fired furnace and gaseous fuel-fired water heater system having a gaseous fuel-fired furnace having a furnace combustion products exhaust, a gaseous fuel-fired water heater having a water heater combustion products exhaust, and a Category III or Category IV vent in communication with the furnace combustion products exhaust and the water heater combustion products exhaust for venting of the combustion products from the furnace and water heater.

A system and method is taught of positively joining to pipes, such as stovepipe or conduit. A first pipe is made with an indentation about the perimeter of one end, into which a second pipe is fitted snugly. The second pipe has a plurality of protrusions about the perimeter near the end to be inserted into the first pipe. The protrusions are shaped so as to allow passage past the indentation in the first pipe during insertion of the second pipe, while resisting disassembly by withdrawing the second pipe.

A detector of combustion products in air gaps adjacent to chimneys or flues has an air gap detection unit coupled to a displaced control unit. The control unit can be located adjacent to a proximal, exposed, surface of a wall. When so installed, the detection unit is located in an air space adjacent to the chimney or flue. The assembly can be removed for cleaning or maintenance.

A flue offering reduced pluming is provided, the flue comprising a flue pipe for carrying flue gas and a liquid collector adapted to collect condensation from the interior of the flue pipe and to shield it from the flue gas.

The invention provides an anti-puffing smoke exhausting device. The device comprisesa main smoke exhausting pipe, apartition board with a center hole, a center pipe, atopboard and atopboard support, oneend of the center pipe passes through the center hole of the partition board and is fixedly connected, the partition board is located in the middle of the center pipe; the center pipe and the partition boardare arranged in the main smoke exhausting pipe, the partition boardis fixedly connected with the main smoke exhaust pipe betweenan inner main smoke exhaust hole and an outer main smoke exhaust hole; the top board component is arrangedin an air outlet end of the main smoke exhausting pipe, an air guide gap is arranged between the top board andthe air outlet end of the center pipe, the top board support of the top board component is connectedwith the main smoke exhaust pipe on the inner side. As a result of the adoption of such astructure, the device has a variety of smoke discharging directions, the deviceis not under the influence of wind direction, and is anti-puffing, safe and reliable, and the potential of safety risk is eliminated.

A combustion device includes a combustion control section which controls combustion in the combustion device; a setting section operated to set information indicating whether or not a plurality of combustion devices are in a common vent discharge state; and a memory section which stores therein connection configurations with the other combustion control sections to which the combustion control section is communicatively connected, and the combustion control section determines whether or not the combustion control section can communicate with a linkage control section or the other combustion control sections, and inhibits combustion in the combustion device to which the combustion control section belongs, in a case where the combustion control section determines that the combustion control section cannot communicate with the linkage control section or at least one of the other combustion control sections and the common vent discharge state is set by the setting section.

The combustion device includes: a burner; an igniter; a fuel supply unit that supplies fuel to the burner; a blower fan that supplies air for combustion; an exhaust port that discharges combustion exhaust; a device control unit that, before ignition of fuel supplied to the burner by operation of the igniter, performs air purge of the burner at a predetermined air blowing amount by driving the blower fan; and a setting means that is set when a check valve for preventing back flow of exhaust is connected to the exhaust port. When the setting means is set to indicate that the check valve is connected, the device control unit controls the operation of the blower fan so that slow-start air purge is performed in which the time interval from the start of air purge until the predetermined air blowing amount is reached becomes longer, than in the case in which no such check valve is connected.

A circulating fluidized bed boiler includes a rectangular furnace, which is horizontally enclosed by sidewalls, for combusting fuel and combustion gas and generating a stream of flue gas and particles. The sidewalls include first and second short sidewalls and first and second long sidewalls. Multiple particle separators are arranged on the side of each of the first and second long sidewalls for separating particles from the stream of flue gas and particles discharged from the furnace. Each of the particle separators includes a vertical gas outlet tube for discharging cleaned flue gas from the particle separator. A back pass arranged on the side of the second short sidewall of the furnace is horizontally enclosed by back pass walls. A horizontally extending cross over duct system is directly connected to the vertical gas outlet tubes of the particle separators for conducting the cleaned flue gas to the back pass.