GB2235971A

GB2235971A - Ducting means for a plurality of heaters installed in superposed rooms of a building

Info

Publication number: GB2235971A
Application number: GB9019885A
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: 1990-09-11
Publication date: 1991-03-20
Anticipated expiration: 2010-09-11
Also published as: DE4028550A1; GB9308785D0; IT9021379A0; GB9019885D0; IT9021379A1; IT1246454B; GB2264775A; FR2651865A1; GB2235971B; NL9001943A; BE1004862A6; GB2264775B

Abstract

Concentric passageways (3, 4) are provided for supplying air to and for discharging exhaust gas from each fan- assisted or other fuel-fired heat source (1). The inner, exhaust passageways are connected to a common vertical chimney (5) which may extend within or outside the building and may be insulated (Fig 9, not shown) and the outer or inlet passageways open to the outside air directly or by a common duct which may enclose the vertical chimney (5). A ducting housing (112) comprises a double cylinder with an upper portion (133) having concentric ducts (128, 131) for connection to the passageways (3, 4) and a relatively pivotal lower portion (134) having a fresh air inlet (114). An inner exhaust passageway (123) is connected to the duct (128) and forms part of the vertical chimney (5). <IMAGE>

Description

Ducting means for a plurality of heaters installed in storeys arrancred

one over the other- The present invention relates to ducting means 5 for connection to a plurality of heaters, particularly fan-assisted heaters, which are installed in storeys arranged one over the other, wherein means for supplying fresh air are provided for each heater and an exhaust gas duct is connected to each heater and leads to a position outside the room in which the heater is installed.

A plurality of heaters are usually connected to chimneys, which extend inside a house and are surrounded by walls and to which the exhaust gas ducts are connected. Fresh air is supplied in most cases through a suitable opening directly from the room in which the heater is installed.

Such connection 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.

2 Accordingly, the present invention relates to ducting means set out in the opening paragraph of the present specification in which each exhaust gas duct is concentrically surrounded by a fresh air passageway, the exhaust gas ducts for a plurality of heaters installed in storeys arranged one over the other extend into an exhaust gas pipe, which extends upwardly outside the building, and the fresh air passageways for respective heaters communicate with the atmosphere through wall openings.

As the exhaust gas ducts extend in the fresh air passagewaysf any escaping exhaust gas will be supplied back through the fresh air line to the heater and thus returned to the exhaust gas duct.

The connection of the exhaust gas ducts to an exhaust gas pipe affords the advantage that such a pipe can be installed quickly and relatively easily and will hardly disturb the appearance of the building because such a pipe is similar in appearance to a drain pipe.

The exhaust gad pipe may be open at both ends so that fresh air always flows through it and a dynamic pressure caused by the wind will not be applied to the apparatus on the air side.

Preferably, the wall openings, which communicate 25 with the fresh air passageways, open directly into the atmosphere and are provided on the outside with a baffle plate. 1 In that case the arrangement for supplying fresh air may be very simple and a change of the flow conditions in the room in which the heater is installed will be avoided. owing to the provision of the baf f le plate, variations in the dynamic pressure of the supply of air to the heater, due to the wind, may substantially be avoided.

Advantageously, the wall openings communicate with the associated fresh air passageways through a duct, which is arranged on the inside of the building wall and is preferably open to the atmosphere at upper and lower ends of the duct.

In such ducting means, the influence of wind pressure on several heaters may also be avoided, particularly if the duct is open at both ends.

In a preferred embodiment the fresh air passageways are directly connected to or extend through the wall openings and are optionally connected to a duct provided on the outside of the building wall.

The exhaust gas ducts may concentrically extend through the wall openings so that separate openings will not be required for the fresh air and exhaust gas ducts. In order to facilitate the discharge of the exhaust gases, -the exhaust gas pipe may be provided with an insulating sheath. 25 In that case the heat of the exhaust gases will substantially be retained, as the exhaust gases rise in the exhaust gas pipe, so that the corresponding convection current of the exhaust gas will be preserved. Besides, in that case the exhaust gas pipe may be relatively small in diameter because the relatively strong convection current will permit the exhaust gas to be conducted at a high rate through a predetermined cross-sectional area.

Preferably, the exhaust gas pipe extends in a_ duct, through which the wall openings connected to the fresh air passageways communicate with each other.

The exhaust gas pipe nay be open at both ends.

According to a further aspect of the present invention there is provided a ducting housing which - constitutes concentric passageways for supplying air and discharging exhaust gas and is particularly provided for a fan-assisted fuel-firing heat source, 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 double cylinder from end to end and is connected to the exhaust gas passageway.

In such a housing an air supply line and an 25 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.

Examples of ducting means and a ducting housing made in accordance with the present invention are shown in the accompanying drawings, in which:

Figure 1 shows a diagrammatic elevational_ representation of such means for heaters; Figures 2 to 6 show respective sectional views of different embodiments of such ducting means; Figures 7 and 8 show respective baffle plates for fresh air openings of such ducting means; Figure 9 shows a sectional elevational view of a residential building provided with such a housing; Figure 10 shows universal connections which can be provided with such a housing; and Figute 11 shows an elevational sectional view of such a housing.

In Figure 1 heaters 1 are arranged in two different storeys of a building 2 and through concentric passageways 3 and 4 communicate with the atmosphere and 6 with an exhaust gas pipe 5, to which interior passageways 4, which serve as exhaust gas ducts, are connected. The exhaust gas pipe 5 is provided at its top end with an outlet 6, through which the exhaust gases flow into the 5 atmosphere.

In the embodiment of the ducting means shown in Figure 2, the inner exhaust gas duct 4 extends through a wall opening 7 and opens into the exhaust gas pipe 5. A fresh air passageway 3 concentrically surrounds the 10 exhaust gas duct 4 and opens into a duct 9, which is mounted on the inside surface of a wall 8 and comprises two parts, which are telescopically interfitted. The duct 9 communicates through a wall opening 10 with a duct 11, which is mounted on the outside surface of the wall 8 and which communicates with or opens into the atmosphere through at least at one of its two ends.

The embodiment shown in Figure 3 differs from that of Figure 2 in that the duct 9 opens directly into the atmosphere through the wall opening 10, which is covered by a baffle plate 12. The exhaust gas pipe 5 is provided with insulation 13.

The embodiment shown in Figure 4 is similar to that illustrated in Figure 2 and comprises an exhaust gas pipe 5 which extends in a duct 111 that is provided on the outside of the wall 8 and through which the wall openings 10 of the different storeys communicate respectively with each, other. The said wall openings 10 7 communicate respectively with the fresh air passageways 3. The embodiment shown in Figure 5 is similar to that illustrated in Figure 4 and comprises a fresh air passageway 3, which directly opens into a wall opening 7f, 5 through which the exhaust gas duct 4 extends.

In the embodiment shown in Figure 6 the exhaust gas duct 4 is connected by an L-shaped pipe to the exhaust gas pipe 5.. The fresh air passageway 3 opens directly into the wall opening 71, which may optionally be covered by a baffle plate.

Such a baffle plate 14 is shown in Figure 7 and comprises a central opening 15 for receiving the exhaust gas duct 4.. The baffle plate 14 is provided with slats 16 and is formed with slots which are partly covered by the said slats 16.

Wall openings through which only fresh air passageways 3 extend or wall openings leading to a duct.g may be covered by baffle plates 18, as shown in Figure 8, which are formed with slots and provided with slats 19 which partly cover said slots.

The residential building 100 shown in Figure 9 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 in either case have a fan-burner unit or a fanassisted 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 5 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 10 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 111, which is associated with the boiler 15 106 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 111 and from which the line 110 extends to the exhaust gas outlet 20 113, 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 9 that, depending upon the number of apartments in the residential building 100, one or more fuel-f ired heat sources 105 or 25 106 are provided and arranged one over the other and may be connected to a common exhaust gas chimney 108. Fresh air 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 10 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 1140) of the triangular covering 117. In the right upper illustration in Figure 10 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 10 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 11. 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 covers from one end face 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 i pipes. The inner space 125 constitutes the exhaust gas passageway. The tubular ports 124 are connected to the chimney sections 110 (see Figure 9). 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 f6r 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 105 is fitted on or in the two parts 128 and 131. A further opening which is equal in diameter to the opening 129 is ssociated 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 joint may be constituted by a lap joint. The upper section 133 of the ducting housing 112 is pivotally movable relative to the 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.

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Claims

1. Ducting means for connection to a plurality of heaters, particularly fan-assisted heaters, which are installed in storeys arranged one over the other, wherein means for supplying fresh air are provided for each heater and an exhaust gas duct is connected to each heater and leads to a position outside the room in which the heater is installed, in which each exhaust gas duct is concentrically surrounded by a fresh air passageway, the exhaust gas ducts for a plurality of heaters installed in storeys arranged one over the other extend into an exhaust gas pipe, which extends upwardly outside the building, and the fresh air passageways for respective heaters communicate with the atmosphere through wall openings.

2. Ducting means according to claim 1, in which the wall openings, which communicate with the fresh air passageways, open directly into the atmosphere and are provided on the outside with a baffle plate.

3. Ducting means according to claim 1 or claim 2, in which the wall openings communicate with the associated fresh air passageways through a duct, which is arranged on the inside of the building wall and is preferably open to the atmosphere at upper and lower ends of the duct.

4. Ducting means according to claim 1, in which the fresh air passageways are directly connected to or 13 - extended through the wall openings and are optionally connected to a duct provided on the outside of the building wall.

5. Ducting means according to any preceding claim, 5 in which the exhaust gas pipe is provided with an insulating sheath.

6. Ducting means according to any preceding claim, in which the exhaust gas pipe extends in a duct, through which the wall openings connected to the fresh air passageways communicate with each other.

7. Ducting means according to any preceding claim, in which the exhaust gas pipe is open at both ends.

8. A ducting housing which constitutes concentric passageways for supplying air and discharging exhaust gas and is particularly provided for a fan-assisted fuelfired heat source, 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 double cylinder from end to end and is connected to the exhaust gas passageway.

9. A ducting housing according to claim 8, 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 5 other and the joint is preferably covered by a clip.

10. Ducting means for connections to a plurality of heaters, particularly fan-assisted heaters, which are disposed in storeys arranged one over the other, substantially as described herein with reference to and as shown in Figure 1 with any one of Figures 2 to 6 with or without the device shown in Figure 7 or Figure 8 of the accompanying drawings.

11. A ducting housing, substantially as described herein with reference to and as shown in Figures 9 to 11 of the accompanying drawings.

Published 1991 atThe Patent Office. State I-louse. 66171 High Holborn. LondonWC1R41'P. Further copies may be obtained from Sales Branch. Unit 6. Nine Mile Point Cwmfelinfach. Cross Keys. NewporL NPI 7HZ. Printed by Multiplex techniques lid. St Mary Cray, Kent.