SE541972C2

SE541972C2 - A chimney arrangement

Info

Publication number: SE541972C2
Application number: SE1750880A
Authority: SE
Inventors: Fredrik Hallström
Original assignee: Fh Entreprenad I Vaenersborg Ab
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2020-01-14
Also published as: SE1750880A1

Abstract

The present invention relates to a chimney arrangement (100). In particular, the chimney arrangement (100) comprises a combustion chamber (102), an inner (104) and an outer (106) conduit, as well as a ventilating device (114) arranged to direct a flow of air outside the inner conduit (104) in the opposite direction of smoke gases from the heating chamber (102).

Description

A CHIMNEY ARRANGEMENT TECHNICAL FIELD The present invention relates to a chimney arrangement. In particular, the present invention relates to a chimney arrangement suitable for installation into a housing compartment.

BACKGROUND Chimney arrangements in housing compartments are being increasingly popular. The chimney arrangements can either be installed in existing housing compartments or form part of new buildings under construction. The chimney arrangement comprises a combustion chamber in which combustion of e.g. the wooden material takes place, and a smoke gas conduit arranged between the combustion chamber and the ambient environment. The smoke gas conduit is thus arranged to direct the smoke gases generated in the combustion chamber out to the ambient environment.

In order to provide a convenient and energy efficient heating of the room or floor at which the heating chamber is positioned, the chimney arrangements are often constructed in such a way that the temperature of the smoke gases are highest in the lower portion of the smoke gas conduit and which temperature is decreased at a certain position above the heating chamber, such as, for example, at a position approximately two meters above the heating chamber.

Based on the above, the temperature level in the smoke gas conduit will thus be at relatively high levels when the smoke gas conduit passes the ceiling, i.e. the joist structure between floors of the housing compartment. Hence, there is a risk of fire taking place at these thermally exposed areas of the housing compartment.

According to legislation in some jurisdictions, the smoke gas conduit is not allowed to be in physical contact with the joist structure of the ceiling. Also, in previous chimney arrangement solutions, cover plates are arranged on the upper and lower portions of the joist structure to cover the gap between the joist structure and the smoke gas conduit. Hereby, the heat in the smoke gas conduit at the position of the joist structure is more or less isolated within the joist structure. There is hence a need to improve the fire safety as well as the thermal efficiency of the chimney arrangement.

SUMMARY It is an object of the present invention to provide a chimney arrangement which at least partially overcomes the above described deficiencies. This is achieved by a chimney arrangement according to claim 1.

According to a first aspect of the present invention, there is provided a chimney arrangement configured to be positioned in a housing compartment, the chimney arrangement comprising a heating chamber arranged to combust a solid fuel material, an inner conduit connected to the heating chamber and arranged to transport smoke gases from the heating chamber to an ambient environment outside of the housing compartment, and an outer conduit enclosing at least a portion of the inner conduit, the outer conduit extending from a first position of the inner conduit, the first position being arranged above the heating chamber as seen in a direction of the smoke gases from the heating chamber, wherein the chimney arrangement further comprises a ventilating device arranged at a second position above the first position of the inner conduit, the ventilating device being arranged to direct a flow of air outside the outer conduit through a gap in a joist structure arranged between the first and second positions and in the opposite direction of the smoke gases from the heating chamber to a living area arranged below the first position of the inner conduit.

The wording “heating chamber” should in the following and throughout the description be interpreted as the portion of the chimney arrangement at which the fire takes place. The heating chamber is also commonly referred to as the stove. Preferably, the solid fuel material is in the form of wooden material or the like.

Furthermore, the wording “outside the inner conduit” should naturally also include the interpretation of outside the outer conduit. Thus, defining that the ventilating device is directing a flow outside the inner conduit may thus also include an embodiment of directing a flow outside the outer conduit as well as between the inner and outer conduit and outside the outer conduit.

Still further, the first position may preferably be arranged in the same room as the heating chamber when the chimney arrangement is installed in the housing compartment. The second position is thus arranged on the floor above the room of the heating chamber, or in the joist structure between the floors.

The present invention is based on the insight that by arranging an outer conduit outside the inner conduit, the outer conduit can extend through the joist structure between the two floors of the housing compartment such that no joints are present in the area of the joist structure. An advantage is that the risk of accidental fire taking place in the joist structure is reduced as leakage of hot air fluid from the smoke pipe, i.e. the inner conduit is prevented. Furthermore, providing a ventilating device at the second position, i.e. above the room at which the heating chamber is positioned, warm air in the area of the joist structure will be forced down to the room comprising the heating chamber. Hereby, the risk of accidental fire taking place in the joist structure is even further reduced. At the same time, the temperature of the pipe structure, i.e. the inner and outer conduits will be reduced and further heat will be provided to the room at which the heating chamber is positioned. This will in turn increase the thermal efficiency in the housing compartment whereby the heating chamber can be less utilized while still providing the same overall sufficient heat to the housing compartment.

According to an example embodiment, the chimney arrangement may further comprise an air passage formed between the inner and outer conduits, wherein the ventilating device is arranged in fluid communication with the air passage to direct the flow of air through the air passage.

Hereby, warm air from the inner conduit will be transported down to the room at which the heating chamber is positioned before being able to be transported out from the outer conduit. Hereby, the risk of warm air reaching the joist structure is even further reduced.

According to an example embodiment, the outer conduit may comprise a plurality of apertures for directing the flow of air out from the air passage to the position outside the inner conduit below the first position of the inner conduit.

Hereby, the air ventilating device will force the air in the air passage between the inner and outer conduits, and further into the room at which the heating chamber is positioned via the plurality of apertures. The apertures may be formed in a plurality of ways, such as elongated, as round or oval through-holes, etc.

According to an example embodiment, the plurality of apertures may be arranged below the second position. The apertures may thus be arranged on the outer conduit between the first and second positions. The plurality of apertures is preferably arranged below ceiling of the inner roof in the room at which the combustion chamber is positioned.

According to an example embodiment, the ventilating device may be positioned outside the outer conduit, the outer conduit comprising an opening for allowing flow of air from the ventilating device into the air passage.

An advantage is that maintenance of the ventilating device may be improved as simplified access to the ventilating device is achieved. The ventilating device may be arranged above the joist structure or in the area of the joist structure.

According to an example embodiment, the ventilating device may be arranged to direct a flow of air into the air passage at a first flow direction, the ventilating device being further arranged to direct a flow of air in a second flow direction outside the outer conduit through the gap in the joist structure and in a direction parallel and in opposite direction compared to the flow direction of smoke gases in the inner conduit.

Hereby, air in the air channel, as well as air outside the air channel is forced by the ventilating device to the position below the first position of the inner conduit. An advantage is thus that even further heat is provided to the room at which the heating chamber is positioned, thereby even further increasing the thermal efficiency. Dual flow directions are hence provided. The second flow direction should thus be interpreted as the direction from the second position towards the first position.

According to an example embodiment, the chimney arrangement may further comprise a heat insulating layer arranged between the inner and outer conduits.

According to an example embodiment, the heat insulating layer may enclose the inner conduit, such that the air passage is arranged between the heat insulating layer and the outer conduit.

The heat insulating layer further prevents heat from being radiated from the inner conduit.

According to a second aspect, there is provided a housing compartment comprising a chimney arrangement installation, the chimney arrangement comprising a heating chamber arranged to combust a solid fuel material, an inner conduit connected to the heating chamber and arranged to transport smoke gases from the heating chamber to an ambient environment outside of the housing compartment, and an outer conduit enclosing at least a portion of the inner conduit, the outer conduit extending from a first position of the inner conduit, the first position being arranged between the heating chamber and a ceiling in the housing compartment, wherein the chimney arrangement further comprises a ventilating device arranged at a second position above the first position of the inner conduit, the ventilating device being arranged to direct a flow of air outside the outer conduit through a gap in a joist structure arranged between the first and second positions and in the opposite direction of the smoke gases from the heating chamber to a position outside the inner conduit to a living area arranged below the ceiling of the housing compartment.

Effects and features of the second aspect are largely analogous to those described above in relation to the first aspect.

Further features of, and advantages with, the present invention will become apparent when studying the appended claims and the following description. The skilled person realize that different features of the present invention may be combined to create embodiments other than those described in the following, without departing from the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of exemplary embodiments of the present invention, wherein: Fig. 1 is a schematic illustration of a chimney arrangement according to an example embodiment; Fig. 2 is a perspective view illustrating details of the chimney arrangement in Fig. 1 according to an example embodiment; Fig. 3 is a perspective view illustrating details of the chimney arrangement in Fig. 1 according to another example embodiment; and Fig. 4 is a perspective view illustrating details of the chimney arrangement in Fig. 1 according to a still further example embodiment; DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS OF THE INVENTION The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness. Like reference character refer to like elements throughout the description.

With reference to Fig. 1, there is depicted an example embodiment of a chimney arrangement 100 installed in a housing compartment 500. As can be seen in Fig. 1, the chimney arrangement 100 comprises a combustion chamber 102 positioned on a first floor 502 of the housing compartment 500. The chimney arrangement 100 further comprises a smoke pipe 101 connected to the combustion chamber 102 and extending out through the roof 504 of the housing compartment, via a joist structure 506 separating the first floor 502 and a second floor 508 of the housing compartment 500, an to the ambient environment of the housing compartment 500. Hereby, smoke gases generated in the combustion chamber 102 of the chimney arrangement 100 is transported to the ambient environment through the smoke pipe 101. In further detail, and as will be described below, the smoke pipe 101 comprises an inner conduit 104 (see Figs. 2 - 4) through which the smoke gases are transported. When combusting a solid fuel material, at least the first floor 502 of the housing compartment 500 will be warmed up by the heat generated in the combustion chamber 102. The solid fuel material can, for example, be log of woods, etc.

Reference is now made to Fig. 2 which illustrates a portion of the chimney arrangement 100 according to an example embodiment. In detail, Fig. 2 is cut through view illustrating the portion of the chimney arrangement 100 which passes through the joist structure 506 between the first 502 and second 508 floors of the housing compartment 500. As described above, the chimney arrangement 100 comprises an inner conduit 104 through which smoke gases from the combustion chamber 102 are transported towards the ambient environment, which is indicated by arrows 202. Furthermore, the chimney arrangement 100 comprises an outer conduit 106 extending between a first position 204 and an upper position 206 of the inner conduit 104. The first position 204 is preferably located in the room of the first floor 502 of the housing compartment, while the upper position 206 is arranged at a vertical distance above the first position 204. The upper position 206 is in Fig. 2 illustrated as located in the room of the second floor 508 of the housing compartment 500. However, the upper position 206 may equally as well be located on the same vertical level as the floor structure 509 of the second floor 508, or in the vicinity of the roof 504 of the housing compartment 500.

Furthermore, the chimney arrangement 100 comprises a heat insulating layer 130 arranged between the inner 104 and outer 106 conduits. Hereby, the heat inside the inner conduit is substantially prevented from being directed out through the outer conduit 106. Moreover, the chimney arrangement further comprises a ventilating device 114 arranged at a second position 208 located above the first position 204. The ventilating device 114 is preferably a fan. As can be seen in Fig. 2, there is a gap 210 between the outer conduit 106 and the joist structure 506. The gap 210 is preferable for fire safety reasons, such that the outer conduit 106 in in no physical contact with the joist structure 506. The gap 210 is covered by an upper cover plate 212 on the floor structure 509 of the second floor 508 and a lower cover plate 214 at the ceiling 112 of the first floor 502.

The ventilating device 114 is arranged to force air present in the gap 210 out into the room of the first floor 502, i.e. the room at which the combustion chamber is positioned. The air present in the gap 210 is thus forced in the opposite direction 216 compared to the direction of the smoke gases 202. Hereby, the outer conduit 106, as well as the inner conduit 104 will be cooled down as heat in the joist structure will be forced away. Also, the room on the first floor 502 at which the combustion chamber 102 is positioned will be heated up to a greater extent.

Reference is now made to Fig. 3 which illustrates another example embodiment of the chimney arrangement 100. The main difference between the embodiment in Fig. 3 and the embodiment depicted in Fig. 2 is that an air passage 302 is formed between the inner 104 and outer 106 conduits. The air passage 302 in Fig. 3 is schematically enlarged for simplicity of understanding. Hereby, the heat insulating layer 130 is preferably arranged between the inner 104 and outer 106 conduits, more preferably between the inner conduit 104 and the air passage 302. As depicted in Fig. 3, the outer conduit 106 comprises a plurality of apertures 304 forming a flow communication between the air passage 302 and the first floor 502 of the housing compartment 500. The apertures 304 in the outer conduit 106 are elongated, although other shapes and configurations are conceivable.

In the embodiment depicted in Fig. 3, the ventilating device 114 is arranged in fluid communication with the air passage 302 formed between the inner 104 and outer 106 conduits. Hereby, the ventilating device 114 forces the air present in the air passage 302 in a first flow direction 401 into the first floor 502 of the housing compartment 500 via the plurality of apertures 304 in the outer conduit 106.

Reference is now made to Fig. 4, which illustrates a still further example embodiment of the chimney arrangement 100. The difference between the chimney arrangement 100 in Fig. 4 and the chimney arrangement in Fig. 3 is that the ventilating device 114 in Fig. 4 is arranged to direct a flow of air also in a second flow direction 402 outside the outer conduit 106 in a direction parallel and in opposite direction compared to the flow direction 202 of the smoke gases in the inner conduit 104. Hereby, the ventilating device 114 is arranged to direct a flow of air in the first flow direction 401, i.e. the same flow direction as illustrated in Fig. 3, as well as in the second flow direction 402. Hereby, even further flow is directed away from the joist structure 506 and into the first floor 502 of the housing compartment 500.

Furthermore, the outer conduit 106, and in particular the portion of the outer conduit 106 arranged below the joist structure 506 may be formed in a different shape than what is depicted in the figures. The portion of the outer conduit 106 may, for example, be taper-shaped, wherein the plurality of apertures is positioned in the taper shaped portion.

It is to be understood that the present invention is not limited to the embodiments described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the appended claims.

Claims

1. A chimney arrangement (100) configured to be positioned in a housing compartment, said chimney arrangement (100) comprising a heating chamber (102) arranged to combust a solid fuel material, an inner conduit (104) connected to the heating chamber (102) and arranged to transport smoke gases from the heating chamber (102) to an ambient environment outside of the housing compartment, and an outer conduit (106) enclosing at least a portion of the inner conduit (104), said outer conduit (106) extending from a first position of the inner conduit (104), said first position being arranged above the heating chamber (102) as seen in a direction of the smoke gases from the heating chamber (102), wherein the chimney arrangement (100) further comprises a ventilating device (114) arranged at a second position above said first position of the inner conduit, characterized in that said ventilating device is arranged to direct a flow of air outside the outer conduit (106) through a gap in a joist structure arranged between the first and second positions and in the opposite direction of the smoke gases from the heating chamber (102) to a living area arranged below the first position of the inner conduit (104).

2. The chimney arrangement according to claim 1, further comprising an air passage (302) formed between the inner (104) and outer (106) conduits, wherein the ventilating device (114) is arranged in fluid communication with the air passage (302) to direct the flow of air through the air passage (302).

3. The chimney arrangement according to claim 2, wherein the outer conduit (106) comprises a plurality of apertures (304) for directing the flow of air out from the air passage (302) to the position outside the inner conduit (104) below the first position of the inner conduit (104).

4. The chimney arrangement according to claim 3, wherein the plurality of apertures (304) is arranged below the second position.

5. The chimney arrangement (100) according to any one of claims 2 - 4, wherein the ventilating device (114) is positioned outside the outer conduit (106), said outer conduit (106) comprising an opening for allowing flow of air from said ventilating device into the air passage.

6. The chimney arrangement (100) according to claim 5, wherein said ventilating device (114) is arranged to direct a flow of air into the air passage (302) at a first flow direction (401), said ventilating (114) device being further arranged to direct a flow of air in a second flow direction (402) outside the outer conduit (106) through the gap in the joist structure and in a direction parallel and in opposite direction compared to the flow direction (202) of smoke gases in the inner conduit (104).

7. The chimney arrangement (100) according to any one of the preceding claims, further comprising a heat insulating layer (130) arranged between the inner (104) and outer (106) conduits.

8. The chimney arrangement (100) according to claim 7, wherein the heat insulating layer (130) is enclosing the inner conduit (104), such that the air passage (302) is arranged between the heat insulating layer (130) and the outer conduit (106).

9. A housing compartment comprising a chimney arrangement installation, the chimney arrangement comprising a heating chamber (102) arranged to combust a solid fuel material, an inner conduit (104) connected to the heating chamber (102) and arranged to transport smoke gases from the heating chamber (102) to an ambient environment outside of the housing compartment, and an outer conduit (106) enclosing at least a portion of the inner conduit (104), said outer conduit (106) extending from a first position of the inner conduit (104), said first position being arranged between the heating chamber (102) and a ceiling in the housing compartment, wherein the chimney arrangement (100) further comprises a ventilating device (114) arranged at a second position above said first position of the inner conduit, characterized in that said ventilating device is arranged to direct a flow of air outside the outer conduit (106) through a gap in a joist structure arranged between the first and second positions and in the opposite direction of the smoke gases from the heating chamber (102) to a position outside said inner conduit (104) to a living area arranged below the ceiling of the housing compartment.