GB2264775A

GB2264775A - A ducting housing for a fuel-fired heater

Info

Publication number: GB2264775A
Application number: GB9308785A
Authority: GB
Inventors: Goetz Beigel; Martin Hogelucht; Manfred Heynen
Original assignee: Joh Vaillant GmbH and Co
Current assignee: Vaillant GmbH
Priority date: 1989-09-12
Filing date: 1993-04-28
Publication date: 1993-09-08
Anticipated expiration: 2013-04-28
Also published as: FR2651865A1; GB2235971B; GB2264775B; IT9021379A1; NL9001943A; IT1246454B; BE1004862A6; IT9021379A0; GB2235971A; DE4028550A1; GB9019885D0; GB9308785D0

Description

2264775 1 A ducting housing for a fuel-fired heater is The present

invention relates to a ducting housing which constitutes concentric passageways for supplying air and discharging exhaust gas and is provided for a fuel-fired heater, especially but not exclusively a fan- assisted fuel-fired heater.

Such arrangements have the disadvantage that exhaust gas may escape in an uncontrolled manner from the exhaust gas duct, which leads to a chimney, into the room in which the associated heater is installed. Besides, the known arrangements permit heaters to be installed only if chimneys are provided.

An aim of the present invention is to avoid these disadvantages and to provide for ducting means which permit such heaters to be connected when there is no chimney and in such a manner that there is no risk of an escape of exhaust gases into the building interior.

Accordingly, the present invention relates to ducting means set out in the opening paragraph of the present specification in which the ducting housing comprises a double cylinder and in its outer cylinder is provided with concentric openings, which face the heat source when in use and serve to supply air and to discharge exhaust gas, and under said concentric openings is provided with a fresh air inlet opening, which is pivotally movable relative to the concentric openings, and an exhaust gas duct axially extends through the outer housing or the

2 double cylinder f rom end to end and is connected to the exhaust gas passageway.

In such a housing an air supply line and an exhaust gas discharge line may permit fan-assisted heaters to be connected to an exhaust gas duct and a universal control of the supply of air.

Advantageously, a joint is provided between the openings for the supply of air and for the discharge of exhaust gas, on the one hand, and the air inlet, on the other hand, so that the ducting housing is bipartite and the two parts are interfitted and are pivotally movable relative to each other and the joint is preferably covered by a clip.

The design of the ducting housing may be very simple in that case.

An example of a ducting housing made in accordance with the present invention is shown in the accompanying drawings, in which:

Figure 1 shows a sectional elevational view of a residential building provided with such a housing; Figure 2 shows universal connections which can be provided with such a housing; and Figure 3 shows an elevational sectional view of such a housing.

The residential building 100 shown in Figure 1 has two storeys 102 and 103, which are separated by a f loor 104. Each storey is provided with a circulating water heater 105 or a boiler 106, which are gas- or oil-fired and is 3 in either case have a fan-burner unit or a fan-assisted atmospheric burner. Instead of a circulating water heater and a boiler, storage-type water heaters, room-heating stoves or flow heaters for heating only water for consumption may be provided. The said heaters serve to generate heat and to heat the storey or alternatively or in addition to provide hot water for consumption. The heaters 105 and 106 have burners which do not use room air, and the fuel-fired heat source provided therein communicates with the atmosphere through concentric means 107 for supplying air from the atmosphere and for discharging exhaust gas through an exhaust gas chimney 108 to the atmosphere. The exhaust gas chimney 108 begins at its lowermost point at an inspection box 109, which is provided with a door and from which an exhaust gas passageway 110 extends upwardly and leads to a first ducting housing ill, which is associated with the boiler 106 and comprises a double cylinder of circular or polygonal crosssection and from which the line 110 is upwardly continued to an overlying second ducting housing 112, which is identical to the ducting housing ill and from which the line 110 extends to the exhaust gas outlet 113, which is provided approximately at roof level. The ducting housing 112, is associated with a circulating water heater 105. It is apparent f rom Figure 1 that, depending upon the number of apartments in the residential building 100, one or more fuel-fired heat sources 105 or 106 are provided and arranged one over the other and may be connected to a common exhaust gas chimney 108. Fresh air is 4 is supplied to the fuel-fired heat sources through the fresh air inlet openings 114, which are provided in the outer cylinder of the ducting housings 111 and 112. It is apparent that the fittings provided with the fresh air inlet openings 114 are pivotally movable. To improve the heat insulation, the line 110 is surrounded by insulating material 115, and the exhaust gas chimney 108 is embedded in a wall or is at least provided with a covering 116.

In the upper left-hand illustration in Figure 2 a triangular covering 117 is provided directly in front of the circulating water heater 105. The passageway 107 extends through the wall 118 of the residential building, and is constructed concentrically. The exhaust gas pipe is internally disposed and is surrounded with an intervening annular space by an outer pipe so that the annular space constitutes the fresh air supply passage for the fuel-fired heat source 105. The fresh air inlet opening 114 can be pivotally moved to one side or the other (at 114') of the triangular covering 117. In the right upper illustration in Figure 2 a prismatic covering 117 is shown and three different positions may be assumed by the fresh air inlet opening 114. In the lowermost illustrations in Figure 2 the concentric air supply and exhaust gas discharge passageways 107 are provided with oblique orientations.

Details of the ducting housing 112 are shown in Figure 3. The ducting housing 112 comprises a double cylinder comprising an outer housing 120 and two end covers 121 and 122.An inner pipe 123 extends through the end is covers f rom one end f ace to the other and comprises tubular ports 124 protruding from the end covers. As a result, there is an inner space 125 in the pipe 123 and an annular space 126 between the two pipes. The inner space 125 constitutes the exhaust gas passageway. The tubular ports 124 are connected to the chimney sections 110 (see Figure 1). The lowermost tubular port 124 is closed by a cover 127 or is connected by a chimney section 110 to the inspection box 109.

Adjacent to the upper end cover 122 an exhaust gas duct 128 is provided, which branches at right angles from the pipe 123 and extends through the annular space 126 and through an opening 129 in the outer pipe 120. The opening 129 is much larger in diameter than is required for the passage for the exhaust gas duct 128 so that an annular space 130 is provided, which serves to supply fresh air and is surrounded by a tubular port 131, which is welded to the opening 129 of the outer pipe 120. The concentric ducting 107 leading to the fuel-fired heat source IOS is fitted on or in the two parts 128 and 131. A further opening which is equal in diameter to the opening 129 is associated with the lower end cover 121 and a tubular port 131, which is designed like the upper tubular port 131, is mounted on the said further opening and serves as an air inlet opening 114. The outer pipe 120 and the inner pipe 123 are divided at 132 between the two openings 129. The j oint may be constituted by a lap joint. The upper section 133 of the ducting housing 112 is pivotally movable relative to the i is 6 lower section 134 at the joint so that the tubular ports 131 and 128 at the upper part are pivotally movable relative to the fresh air inlet opening 114. The joint may be covered by a clip 135 by which the two housing sections 133 and 134 are held in their adjusted position. The inner pipe sections of the ducting housing are interfitted and are not locked in position.

For the sake of precaution a condensation drain opening 136 may be provided in the lower section 134 of the ducting housing adjacent to or in the end cover 121.

A feature of the ducting housing resides 'in that, with many such housings, all the exhaust gas outlets 128 of respective fuel-fired heat sources of a building are combined and-, the fresh air inlet openings 114 may be individually positioned. An individual fresh air inlet opening 114 is associated with each heater and arranged in a variable position. Independently thereof, all heaters are associated on the exhaust gas side with the same exhaust gas chimney but the positions of the several exhaust gas openings are also variable relative to the position of the exhaust gas chimney 108 and to the positions of the several air inlet openings 114 so that universal connections may be provided.

7

Claims

Claims is 1. A ducting housing which constitutes concentric passageways

for supplying air and discharging exhaust gas and is provided for a fuel-fired heater, especially but not exclusively a fan-assisted fuel-fired heater, in which the ducting housing comprises a double cylinder and in its outer cylinder is provided with concentric openings, which f ace the heat source when in use and serve to supply air and to discharge exhaust gas, and under said concentric openings is provided with a fresh air inlet opening, which is pivotally movable relative to the concentric openings, and an exhaust gas duct axially extends through the outer housing or the double cylinder from end to end and is connected to the exhaust gas passageway.
2. A ducting housing according to claim 1, in which a joint is provided between the openings for the supply of air and for the discharge of exhaust gas, on the one hand, and the air inlet, on the other hand, so that the ducting housing is bipartite and the two parts are interfitted and are pivotally movable relative to each other and the joint is preferably covered by a clip.
3. A ducting housing, substantially as described herein with reference to and as shown in Figures 1 to 3 of the accompanying drawings.