CHIMNEY FLUE SLEEVE OF A CHIMNEY FLUE

Abstract

 The invention relates to a chimney flue sleeve (11) of a chimney flue (10), which chimney flue (10) is for leading smoke and flue gases from a heating unit outside a warmed space (19) the in vertical direction through an intermediate floor structure (17) between a warmed space (19) and an unheated space (18) and forms a channel for the hot smoke and flue gas flow and which chimney flue (10) is made of steel. The chimney flue sleeve (11) is located around the chimney flue (10) and on the intermediate floor structure (17), extends upwards from the intermediate floor structure (17) and the chimney flue sleeve (11) is made of material of good conductivity of heat having coefficient of thermal conductivity of at least 100 W/Km.

Description

Technical field

[0001] The invention relates to chimneys and more specially to chimney flues. Especially the invention relates to a chimney flue sleeve of a chimney flue according to the preamble of claim 1.

Background

[0002] As known chimneys are used in buildings to lead smoke and flue gases from heating units, such as fireplaces, furnaces, ovens, sauna stoves, wood stoves, outside the building typically in vertical direction through any intermediate floor structures and attic and roof structures of the building. Inside the chimney there is at least one chimney flue as a channel for the hot smoke and flue gas flow.

[0003] Many different types of chimneys are known from prior art. In recent times module-built chimneys have become increasingly popular, especially due to their lightweight structure. Module built chimneys have as the chimney flue typically an inner pipe made of steel, typically wall thickness of the inner pipe being around 1 mm and an outer pipe made of steel, typically wall thickness of the outer pipe being about 0,7 - 0,8 mm, and between the inner pipe and the outer pipe located insulating material, typically being ceramic material, with thickness of around 150 mm. The diameter of the chimney is typically about 100 -125 mm. The module-built chimney comprises several modules, each comprising the inner pipe, the outer pipe and the insulating material attached on top of each other by different types of attachment means, such as adjusting rings.

[0004] The lightweight structure of the module-built chimneys causes a very fast temperature increase in the structure, when the hot smoke and flue gases flow through the chimney flue as typically the temperature of the chimney flue of the module-built chimney can be even 600 °C. The chimney flue being located inside typically a very thick insulation layer of intermediate floors and roof structures, temperature inside the insulation layer increases to very high levels, even to temperatures, in which roof trusses inside the insulation layer may become charred.

[0005] In patent publication US4630415 is disclosed a fire stop for sealing the space between a conduit, and the periphery of an opening in a structural member through which the conduit passes. The fire stop comprises a collar having a bore for sealable engagement with the conduit and an outer periphery. In one embodiment of the invention the collar is of a cementitious material.

[0006] In patent application publication EP1411287 is disclosed a fire resistant passageway apparatus for a conduit, an assembly comprising fire resistant passageway apparatus and a conduit passageway means having an aperture therein for a conduit to pass therethrough, the passageway means further comprising an opening therein in order to enable gas to pass therethrough, the fire resistant passageway apparatus further comprising fire resistant means to inhibit the passage of fire through the opening once the fire resistant means has been activated wherein the fire resistant means comprises an intumescent material and the opening comprises a ventilation opening to enable gas to flow around the conduit and through the barrier, in use.

[0007] In patent application publication FR3004528 is disclosed a device for increasing the heat diffusion of a stove by placing around the flue gas pipe a removable thermal recuperation fins intended to improve the energy efficiency of wood stoves.

[0008] In patent publication CA2123849 is disclosed a shield assembly made of a plurality of elements to be installed around a chimney to protect the framing of the floor and ceiling of a house as well as the surrounding walls in the case of a famed-in chimney. The elements of the assembly are devised so that the heat generated by the chimney is dissipated within a plurality of air gaps in open communication with each other, which extend around the chimney all along the same from the floor up to the attic of the house, above the upper ceiling.

[0009] In patent publication US4142679 is disclosed a heat jacket to be placed on the chimney flue and for passing air through the passageway provided therebetween for redistribution to areas being heated.

[0010] An object of the invention is to create a chimney flue sleeve of a chimney flue, in which the problems and disadvantages of prior art have been eliminated or at least minimized.

[0011] An object of the invention is to create a chimney flue sleeve of a chimney flue, which improves the fire safety of chimney flues, especially in module-built chimneys.

Summary

[0012] In order to achieve the above objects and those that will come apparent later the chimney flue sleeve of a chimney flue according to the invention is mainly characterized by the features of claim 1. Advantageous embodiments and features are disclosed in the dependent claims.

[0013] According to the invention the chimney flue sleeve of a chimney flue, which chimney flue is for leading smoke and flue gases from a heating unit outside a warmed space the in vertical direction through an intermediate floor structure between a warmed space and an unheated space and forms a channel for the hot smoke and flue gas flow and which chimney flue is made of steel, is located around the chimney flue and on the intermediate floor structure, extends upwards from the intermediate floor structure and is made of material of good conductivity of heat having coefficient of thermal conductivity of at least 100 W/Km.

[0014] According to an advantageous feature of the invention the chimney flue sleeve is made of aluminum or copper or zinc or of any combination of aluminum and/or copper and/or zinc.

[0015] According to an advantageous feature of the invention wall thickness of the chimney flue sleeve is at least 2 mm, advantageously 5 - 6 mm.

[0016] According to an advantageous feature of the invention the chimney flue sleeve comprises a cooling ring at its upper end.

[0017] According to an advantageous feature of the invention the cooling ring comprises at least one cooling plate, which extends outwards radially from the cooling ring.

[0018] According to an advantageous feature of the invention the chimney flue sleeve extends through on top of the intermediate floor structure located an insulation layer and a distance above the upper surface of the insulation layer.

[0019] According to an advantageous feature of the invention the distance of the chimney flue sleeve above the upper surface of the insulation layer is at least 200 mm.

[0020] According to the invention the chimney flue sleeve constructs thus a heat conductive structure around the chimney flue, by which the heat conducted from the chimney flue, when in use, is guided to the unheated space by convection and/or radiation and prevented to enter at least in excessive amounts of thermal energy to the insulation layer and other structures on the intermediate floor between the warmed space and the unheated space.

[0021] According to further advantageous aspects of the invention the cooling ring and the cooling plates further increase the heat conductivity of the chimney flue sleeve.

[0022] According to an advantageous aspect of the invention between the chimney flue sleeve and the chimney flue fire-proof insulation material is located and the chimney flue sleeve is located around the fire-proof insulation material.

[0023] According to an advantageous aspect of the invention the chimney flue is a module-built chimney flue comprising an inner sleeve and an outer sleeve and between the inner sleeve and the outer sleeve located fire-proof insulation material and the chimney flue sleeve is located around the outer sleeve of the module-built chimney flue.

[0024] By the invention and its advantageous examples, a chimney flue sleeve of a chimney flue is achieved, which improves the fire safety of chimney flues, especially in module-built chimneys. The chimney flue sleeve also provides for efficient and fast heat convection from the chimney flue away from any insulation layer and/or fire from any to fire unresistant materials to an unheated space.

Brief description of the drawings

[0025] In the following the invention is described in more detail with reference to the accompanying drawing, in which an advantageous example of the invention is presented and in details of which the invention is not to be narrowly limited.

[0026] In figure 1 is schematically shown an advantageous example of the chimney flue sleeve of a chimney flue in accordance with the invention.

[0027] In figure 2 is schematically shown an advantageous example of the chimney flue sleeve of a chimney flue in accordance with the invention.

[0028] During the course of the following description relating to figures 1 - 2 like numbers and signs will be used to identify like elements according to the different views which illustrate the invention and its advantageous example. In the figures some repetitive reference signs have been omitted for clarity reasons.

Detailed description

[0029] In the figure 1 is shown an example of a chimney flue sleeve 11 located around a chimney flue 10. In connection with the chimney flue sleeve 11 a cover sleeve 22 may be located. The chimney flue 10 is for leading smoke and flue gases from a heating unit outside a warmed space 19 the in vertical direction through an intermediate floor structure 17 between the warmed space 19 and an unheated space 18. In between the first warmed space 19 and the unheated space 18 can also be one or more intermediate floor structures and warmed spaces. The chimney flue 10 forms a channel for the hot smoke and flue gas flow. The chimney flue 10 is made of steel material. Between the chimney flue sleeve 11 and the chimney flue 10 fire-proof insulation material 12 is located and thus the chimney flue sleeve 11 is located on the fire-proof insulation material. The insulation material 12 is advantageously mineral wool, rock wool or ceramic wool. In case the structure of the chimney flue 10 and the chimney flue sleeve 11 extends through warmed spaces from the first warmed space 19 to the unheated space 18 the thickness of the insulation material can be smaller. The chimney flue sleeve 11 extends at least form a first intermediate floor 17 above the first warmed space 19 to the unheated space. The chimney flue sleeve 11 is made of material of good conductivity of heat having coefficient of thermal conductivity of at least 100 W/Km and thus the fire safety of chimney flues, especially in module-built chimneys is improved as the chimney flue sleeve provides for efficient and fast heat convection from the chimney flue away from any insulation layer and/or fire from any to fire unresistant materials to an unheated space.

[0030] In the figure 2 is shown an example of a chimney flue sleeve 11 located around a module-built chimney flue 10. The module-built chimney flue 10 is for leading smoke and flue gases from a heating unit outside a warmed space 19 the in vertical direction through an intermediate floor structure 17 between the warmed space 19 and an unheated space 18. In between the first warmed space 19 and the unheated space 18 can also be one or more intermediate floor structures and warmed spaces. The chimney flue sleeve 11 extends at least form a first intermediate floor 17 above the first warmed space 19 to the unheated space. The module-built chimney flue 10 forms a channel for the hot smoke and flue gas flow. The module-built chimney flue 10 has an inner sleeve 21 and an outer sleeve 20 made of steel material. The chimney flue sleeve 11 is located around the outer sleeve 20 of the module-built chimney flue 10. Between the inner sleeve 21 and the outer sleeve 20 fire-proof insulation material 12 is located. The insulation material 12 is advantageously mineral wool, rock wool or ceramic wool. In case the structure of the module-built chimney flue 10 and the chimney flue sleeve 11 extend through warmed spaces from the first warmed space 19 to the unheated space 18 the thickness of the insulation material can be smaller. The chimney flue sleeve 11 is made of material of good conductivity of heat having coefficient of thermal conductivity of at least 100 W/Km and thus the fire safety of chimney flues, especially in module-built chimneys is improved as the chimney flue sleeve provides for efficient and fast heat convection from the chimney flue away from any insulation layer and/or fire from any to fire unresistant materials to an unheated space. As shown in the example of the figure 2 the module-built chimney flue 10 extends from the first warmed space 19 to the unheated space 18.

[0031] In the examples of figures 1 and 2 on top of the intermediate floor structure 17 between the warmed space 19 and the unheated space 18 an insulation layer 13 is located in order to thermally insulate the warmed space 19 from the unheated space 18 to avoid thermal losses of heating by at least a heating unit connected to the chimney flue 10. The insulation layer 13 is for example of fibrous eco insulation material.

[0032] Onto the intermediate floor 17 and inside the insulation layer 13 at least one roof truss 14 is located.

[0033] The chimney flue sleeve 11 comprises a cooling ring 15 at the upper end. The cooling ring 15 comprises at least one cooling plate 16, in the example of the figure two cooling plates 16, which extend outwards radially from the cooling ring 15 and the chimney flue sleeve 11. From the cooling ring 15, at which the chimney flue sleeve 11 ends, the chimney flue sleeve 11 continues upwards as a thinner cover sleeve 22 in the example of figure 1 and in the example of figure 2 the chimney flue sleeve 11 also ends at the cooling ring 15 and the outer sleeve 21 of the module built chimney extends upwards.

[0034] The cooling plates 16 can have different forms than the horizontally extending configuration as shown in the figure. They can also extend in other directions or be for example formed as fins or overfills.

[0035] The surfaces of the cooling ring 15 and the cooling plates 16 can be painted black to increase heat emission by radiation.

[0036] The chimney flue sleeve 11 is made of material with good conductivity of heat with coefficient of thermal conductivity of at least 100 W/Km.

[0037] The thermal resistance of the chimney flue sleeve 11 is advantageously 1 - 2 K/W.

[0038] Advantageously the material of the chimney flue sleeve 11 is aluminum or copper or zinc or any composition of them. The wall thickness of the chimney flue sleeve 11 is at least 2 mm, more advantageously 5 - 6 mm in case aluminum is used as the material of the chimney flue sleeve 11. In case copper is used the wall thickness of the chimney flue sleeve 11 is advantageously about 1 mm. The wall thickness of the chimney flue sleeve 11 is determined based on the thermal conductivity of the selected material of the chimney flue sleeve 11 and the conductivity of heat required in connection with the chimney flue 10 in use.

[0039] The cooling ring 15 and the cooling plates 16 are advantageously made of the same material as the chimney flue sleeve 11 but also other material with good conductivity of heat can be used.

[0040] The chimney flue sleeve 11 is located around the chimney flue 10 and its lower end is supported onto the upper surface of the intermediate floor 17. The chimney flue 11 extend substantially upwards from the intermediate floor 17 through the insulation layer 13 and to a distance above the upper surface of the insulation layer 13, which distance is advantageously at least about 200 mm, to the open, unheated space 18. The distance is determined based the need of heat conductivity, the heat conductivity of the flue sleeve 11 and the heat receptivity of the unheated space 18. The chimney flue sleeve 11 is attached for example to the roof truss 14.

[0041] The chimney flue sleeve 11 constructs thus a heat conductive structure around the chimney flue 10, by which the heat conducted from the chimney flue 10, when in use, is guided to the unheated space 18 by convection and/or radiation and prevented to enter at least in excessive amounts of thermal energy to the insulation layer 13 and other structures, such as the roof truss 14 on the intermediate floor 17 between the warmed space 19 and the unheated space 18. The cooling ring 15 and the cooling plates 16 further increase the heat conductivity of the chimney flue sleeve 11.

[0042] The chimney flue sleeve 11 and/or the cooling ring 15 and/or the cooling plates 16 can be made by casting and/or by sheet working.

[0043] Thickness of the cover sleeve 22 is advantageously less than 0,8 mm.
In the examples of the figures 1 and 2 cross-section of the chimney flue and the chimney flue sleeve is circular but the cross-section can vary, as is apparent to one skilled in the art, and thus the cross-section can be also for example quadrangular, rectangular, elliptic etc.

[0044] In the description in the foregoing, although some functions have been described with reference to certain features, those functions may be performable by other features whether described or not. Although features have been described with reference to certain embodiments or examples, those features may also be present in other embodiments or examples whether described or not.

[0045] Above only some advantageous examples of the inventions have been described to which examples the invention is not to be narrowly limited and many modifications and alterations of the details of the invention are possible within the scope of the following claims.

Reference signs used in the drawing:

[0046] 

10

chimney flue

11

chimney flue sleeve

12

insulation material between the chimney flue the chimney flue sleeve

13

insulation layer

14

roof truss

15

cooling ring

16

cooling plate

17

intermediate floor

18

unheated space

19

warmed space

20

outer sleeve

21

inner sleeve

22

cover sleeve

Claims

1. Chimney flue sleeve (11) of a chimney flue (10), which chimney flue (10) is for leading smoke and flue gases from a heating unit outside a warmed space (19) the in vertical direction through an intermediate floor structure (17) between a warmed space (19) and an unheated space (18) and forms a channel for the hot smoke and flue gas flow and which chimney flue (10) is made of steel, which chimney flue sleeve (11) is located around the chimney flue (10) and extends upwards from the intermediate floor structure (17), characterized in that the chimney flue sleeve (11) is located on the intermediate floor structure (17), that the chimney flue sleeve (11) is made of material of good conductivity of heat having coefficient of thermal conductivity of at least 100 W/Km and that the chimney flue sleeve (11) is configured to construct a heat conductive structure around the chimney flue (10), by which the heat conducted from the chimney flue, when in use, is guided to the unheated space by convection and/or radiation and the heat conducted from the chimney flue is prevented to enter at least in excessive amounts of thermal energy to an insulation layer and other structures on the intermediate floor between the warmed space and the unheated space.

2. Chimney flue sleeve of a chimney flue according to claim 1, characterized in that the chimney flue sleeve (11) is made of aluminum or copper or zinc or of any combination of aluminum and/or copper and/or zinc.

3. Chimney flue sleeve of a chimney flue according to claim 1 or 2, characterized in that wall thickness of the chimney flue sleeve (11) is at least 2 mm, advantageously 5 - 6 mm.

4. Chimney flue sleeve of a chimney flue according to any of the claims 1 - 3, characterized in that the chimney flue sleeve (11) comprises a cooling ring (15) at its upper end.

5. Chimney flue sleeve of a chimney flue according to claim 4, characterized in that the cooling ring (15) comprises at least one cooling plate (16), which extends outwards radially from the cooling ring (15).

6. Chimney flue sleeve of a chimney flue according to any of the claims 1 - 5, characterized in that the chimney flue sleeve is configured to extend through on top of the intermediate floor structure (17) located an insulation layer (13) and a distance above the upper surface of the insulation layer (13).

7. Chimney flue sleeve of a chimney flue according to claim 6, characterized in that the distance of the chimney flue sleeve (11) above the upper surface of the insulation layer (13) is configured to be at least 200 mm.

8. Chimney flue sleeve of a chimney flue according to any of claims 1 - 7, characterized in that between the chimney flue sleeve (11) and the chimney flue (10) fire-proof insulation material (12) is located and the chimney flue sleeve (11) is located around the fire-proof insulation material (12).

9. Chimney flue sleeve of a chimney flue according to any of claims 1 - 8, characterized in that the chimney flue (10) is a module-built chimney flue comprising an inner sleeve (21) and an outer sleeve (20) and between the inner sleeve (21) and the outer sleeve (20) located fire-proof insulation material (12) and that the chimney flue sleeve (11) is located around the outer sleeve (20) of the module-built chimney flue (10).

Drawing