FI110380B - Improved sauna heater - Google Patents

Description

110380

The present invention relates to an improved sauna heater, the heater comprising a hinged door with a hinged door and a stone space substantially above the hearth, wherein the upper bottom portion of the firebox, each leading to their own inlet in the posterior chamber. In particular, the present invention relates to a wood-heated and continuously heated sauna heater, that is to say, a heater in which the heating 10 can be continued during the steaming operation.

Previously, woodburning woodburning stove heaters have sought to achieve complete combustion inside the stove, for example, so that the flue gases do not enter the chimney directly into and out of the combustion chamber but are flush with the central and rear along the entire lower surface of the fireplace top wall. When said upper wall at the same time serves as a base for the stone space of the heater, satisfactory heat transfer to the heater stones is achieved. However, there are drawbacks to the arrangement described. First of all, the heat transfer of hot flue gases to the sauna stones through the mainly flat bottom of the stone space and the outer walls, which are the upward extensions of the walls of the fire V: 20 space, is not yet of particular power: Y. Secondly, as far as possible the complete combustion of the fuel just inside the heater is achieved only in a limited operating mode, the heater must be pulled by the weather. · · *. and all firewalls must be at a suitable high enough temperature. Obviously, there is no such high temperature • * 25, at least not in the early stages of heating the heater, and the heater user may or may not * * * constantly monitor the suitability of the draft.

The object of the present invention is to provide an improvement in the above-mentioned drawbacks. To accomplish this, the improved sauna heater according to the invention is characterized by what is stated in the characterizing parts of the claims.

: 30 The advantage of the invention is that the combustion efficiency of the stove, i.e. that all the fuel: '·. Flammable components burn as closely as possible, is high. An advantage of the invention is that the combustion efficiency is high in the heater itself, i.e. all combustible components of the fuel burn as closely as possible inside the heater and not, for example, in a heated chimney. An advantage of the invention is that the heating of the sauna stones is efficient, i.e. the heat generated by the combustion of the fuel is effectively transferred to the sauna stones. An advantage of the invention is that high combustion efficiency and efficient heat transfer to the sauna stones are achieved at an early stage after ignition of the fire in the stove and then during continuous heating with minimal or no monitoring. An advantage of the invention is that arrangements with high combustion efficiency can be easily cleaned and cleaned. An advantage of the invention is that the structural arrangements used reliably retain their shape during long-term use 1. in continuous heating and cooling. An advantage of the invention is that the excess steam water leaves the stone space without remaining in the space vii-10 with the resulting disadvantages. An advantage of the invention is that it allows a suitable airflow between the stone space between the stones during heating to properly heat the sauna room. An advantage of the invention is that it also allows a large amount of stones to be supplied to the heater without giving up the efficient transfer of heat to the heater stones.

The foregoing advantages and the more specific features of the improved sauna heater according to the invention will be apparent from the following detailed description of the invention.

The invention will be described with reference to the accompanying figures, in which:

Figure 1 is a side elevational view of an improved ready-to-use sauna sauna heater according to the invention.

Figure 2 is a front view of the heater of Figure 1.

Figure 3 is a rear view of the heater of Figure 1.

. * · ·. Figure 4 is a top view of the heater of Figure 1.

'' Figure 5 is a side elevation and slightly larger scale of the heater of Figure 1 ... · with the jacket and hatch portions removed.

. ·. Figure 6 is a front view of the arrangement of Figure 5.

Fig. 7 shows the arrangement of Fig. 6 from above.

* · * ;;; Fig. 8 shows a sectional view in the direction of the arrows of Fig. 5, A-A.

; Fig. 9 is a side elevational view showing the top of the heater body of the heater according to the invention.

Figure 10 is a front view of the arrangement of Figure 9.

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Figure 11 is a top plan view of the arrangement of Figure 9.

Figure 12 is a rear view of the arrangement of Figure 9.

Figure 13 shows on an enlarged scale details of a fire pipe arrangement included in an improved sauna heater according to the invention.

Figures 1, 2, 3 and 4 show a sauna heater 1 according to the invention ready to be placed in a sauna, to be connected to a chimney flue and to be equipped with a heater stove. The heater 1 comprises, as its outermost part, an outer jacket 2, which, when secured to the heater body 3 by means of fastening parts 4, is at a suitable distance from the vertical outer walls of the heater body 3. Said distance allows a cooling air flow between the heater body 3 and the outer jacket, whereby the outer jacket 2 remains safely cool during heating of the heater. In the upper part of the heater 1, the upper edges of the vertical walls of the heater body 3 and the outer edges of the outer jacket 2 are joined and covered by an upper edge profile 5 provided with openings 6 along its circumference which allow said cooling air flow. The upwardly extending cut-out 15 of the outer jacket 2 on the front of the stove 1 leaves visible and usable the ashtray lid 7 and the stove cover 8. The latter may be provided with a fireproof window 9 to allow atmospheric illumination of the stove during heating and . On the back of the stove 1 there is a flue connection 10 for horizontal connection to a source 20 flue. If the outgoing smoke flue is vertical, the flue is connected to the • flue connection 1 from the top when viewed from the top of the stove 1. these 10 and 11 are alternate, with the connection 10 or 11 not being used,. * · ·. cover with a suitable and secured, non-shown cover over the connection.

Opening upwardly at the top of the stove 1, there is a stone space 12 which, without the stones, is shown by> · 25 in Figure 4.

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The heater body 3 comprises a vertical wall extending from the front wall 13, two side walls *. and the rear wall 15, which together form through the corner portions 16, the walls 13, 14 and 15, vertically tubular and rectangular in cross-section. The front wall 13 comprises a lower part; ; In steps 30, ashes the opening 17 and the firebox or furnace opening 18, which is provided at its edges as a protruding frame 19. At the second lateral edge of the frame 19 is hingedly attached the previously mentioned bonnet lid 8.

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At the lower part of the heater body 3 there is a lower base part 20 which, along its peripheral parts, e.g. by welding to the walls 13, 14 and 15, closes below the tubular part formed by the walls 13, 14 and 15. The bottom-trough portion of the bottom sole forms an ash 21 which opens forward through an opening 17. Above the ash, the si-5 rests on the grate 22, e.g. From the upper side edges of the trough-like ash, the walls of the bottom sole 20 extend obliquely to the side and upwards in the bottom parts 24 of the bottom sole to the side walls 14. A furnace 28 is located above the grate 22 and the side members 24 of the lower base.

The front, side and rear walls 13, 14 and 15 of the heater body 3 are provided with upwardly extending cuts 25 at their lower edges such that the body 3 comprises at its lower parts leg portions 26 at the lower ends of the corner portions 16. As the bottom sole 20 and adjacent portions of the walls 13, 14 and 15 heat up vigorously during heating of the heater, the cuts 25 between the leg portions 26 allow a cooling air flow to pass through the bottom sole portion 20 and out through multiple openings 27 14 below the interfaces.

According to the invention, the stove body 3 comprises an upper base member 29 mounted above its furnace 28, e.g. by welding to the walls 13, 14 and 15, the upper base member 29 closing the tubular portion formed by the walls 13, 14 and 15; 6, 10 and 12, as shown in Figures 6, 10 and 12, is preferably provided with its center stage 30 with an upward bend so that it is inclined slightly downwards on both sides towards the side walls 14. The function of said bending, when the heater -; ..: 25 different parts of the frame 3 expand in different ways during the heating of the heater, gives the upper base. a predetermined direction for the thermal expansion movement of the portion 29 and its peak 30, i.e., the central region 30 is able to move and move vertically rather than completely. . in the case of a flat upper sole member 29, the member 29 in continuous thermal expansion and contraction would move indefinitely and eventually lose its planar shape 30 and assume an indefinitely warped and dented shape. In addition, when the top floor 1: section 29 is bent as described, excess steam water does not rest on the bottom 29 of the stoneware but flows towards the side walls 14 to exit the stone space. '. openings 31 provided on the side walls 14 such that the lower edges of the openings 31; ; are substantially flush with the upper surfaces of the adjacent side edges of the upper base portion 29. Another function of the apertures 31, in addition to the aforementioned removal of excess steam, is to act as air flow apertures so that some of the air flowing upwardly between the outer jacket 2 and the stove body 3 is guided through the apertures 31 to the stove indoors, allowing the sauna room to warm up appropriately.

It has been described above how the heat movement of the upper sole portion 29 can be pre-directed by bending the middle region 30 of the upper sole portion, thereby preventing deformation of the upper sole portion 5. Now that, in the improved sauna stove 1 of the invention, the side walls 14 of the stove body 3 are outwardly curved or convex in cross section, as shown in Figures 7, 8 and 11, said curvature functions in a manner corresponding to bending of the middle region 30 of the top. This means that the walls 14 retain their intended curved shape throughout the lifetime of the heater 10, despite repeated heating-cooling cycles over a long period of time.

It has been described above how, due to the upward bending of the middle region 30 of the upper base portion and the openings 31, excess steam cannot be rested in the stone space. This property ensures that even the cooled sauna heater's hot water cannot remain in the structures causing corrosion. Further, since under no circumstances can the water be rested on the bottom of the stone space 12, there is also no danger. water acting as a breeding ground for bacteria or the like.

According to the invention, the upper base portion 29 is provided with an outlet 33 on both sides of the vertical central plane 32 on its front portions, each of the openings 33 being guided to its own cannon 34. Each of the cannons 34 can roughly be said »· y. 90 ° clockwise L-shaped L-shaped corner with rounded. More generally, the general shape of each tubular torch 34, starting from aperture 33, · · ·, is such that, at its initial portion 35, the torch extends substantially upward and slightly '. forward, in the direction of forward direction, meaning the front of the stove 1, i.e., the side 25 on which the furnace lid 8 is located. After the initial portion 35, the bellows 34 extends as a curved portion 36 and curves rearwardly so that the bellows 34 extends substantially horizontally 37 Front wall- '! The aperture 39 is provided with an aperture 40 corresponding to the shape and size of the associated horizontal member 37 attached thereto, for example by welding, which serves as the main port 30 of the after chamber 38, and thus has two main inlets 40. The horizontal portion 37 of the lumen 34 extends, still past the opening 40 into the posterior chamber 38 as an extension 41. The extension 41 only comprises: 'the second half of the lumen 34, when the lumen is thought to be divided into two halves: i. In practice, the torch 34 may initially be formed of two halves 35, for example welded, connected to one another by their peripheral portions extending along the dividing plane 42.

The cannula extension 41 extending within the posterior chamber 38 extends in the vicinity of the rear wall 15 6 110380. When positioned and formed as shown, the bellows extension 41 prevents direct flue gases entering along the bellows 34 from the after chamber 38 from being directly discharged to the flue connection 10 or 11. It should be noted that the cross sectional area of the bellows 34 is substantially uniformly and continuously reduced Further, the horizontal portion 37 of the horn 34 is substantially spaced from the bottom of the stone space 29 so that stove stones can be placed in the space formed by said distance between the horizontal portion 37 and the bottom of the stone space 29.

The rear chamber 15 according to the invention, already mentioned above, is delimited by a rear wall 15 at the rear and side walls 14 at the sides. At the top, the rear chamber is delimited by the upper chamber wall 43, the front chamber front 39 and lower by the rear. As shown in the figures, it is sufficient for the after wall 38 to be secured, for example, by welding at its lateral edge a front wall 39 comprising openings 40 for fastening and passage of fire horns 34 and an upper wall 43 extending along the joining region of walls 39, 43 to the side walls 14 and at its bottom edge to the bottom of the stone space 29. The top wall 43 of the after-chamber comprises, at the middle plane 32, the previously mentioned chimney connection 11 formed by an opening with a collar on the top wall 43. The rear wall of the after-chamber comprises, at mid-stage 32, the previously mentioned chimney connection 20, which is formed by an opening with a collar arranged in stages on the upper part of the rear wall 15 of the heater body.

According to the invention, the after-chamber 38 is provided with two fire tube arrangements 44 which are located substantially symmetrically with respect to the median plane 32. Each fire-pipe arrangement 44 comprises a fire pipe 45 located inside the after-chamber 38 by means of,; 25 in which the corresponding cannula 34 opens. At the lower end of each fire tube 45, the upper bottom portion 29 comprises a gas flow opening 46, and in the embodiment, the fire tube 45 is formed substantially along the entire length of its jacket through a torn tube. . part to a. In the exemplary embodiment, the fire tube 45 is secured to the top wall 43 of the post-chamber 38 by an arrangement comprising, firstly, deep trapping of the flange 47 of the upper end 45 of the fire tube 45, e.g. by welding between the attached plate 48 and the closure 49; in the collared opening 50 of wall 43 When the heat pipe 45 heats up and is intended to heat vigorously and rapidly at all times during the heating of the heater '; up to red glow, it is advantageous to be made of a special refractory material 35 and, when captured by its flange 47 between portions 48, 49 of a more conventional material, despite the difference in material properties, remains attached to the closing lid 49 110 for extended use. The upper wall opening 50 covered by the closure cover 49 can again be utilized by removing the cover 49 and the fire tube 45 therewith for sweeping the after chamber 38, for which purpose the opening 50 is advantageously dimensioned so that a nozzle for e.g.

The improved sauna heater 1 according to the invention described above is brought into operation in the sauna room or room by connecting it from the chimney connection 10 or 11 to the flue gas discharge chimney and providing the stone space 12 with a suitable number of heater stones so that the upper surface level of the stones reaches at least Then, when the firewood in the furnace 28 is burning during the heating of the stove 1, most of the combustion and / or flue gases flow into the furnace 34 as schematically indicated by arrows 51. In the lumen 34, the flow rate of the gases increases, partly because the combustion reaction may continue in the lumen, expanding the volume of the gases, but also because the cross-sectional area of the lumen decreases as it passes from the outlet openings 33 to the lance 40. An increase in the gas flow rate means that the gases enter the after-chamber 38 at a higher rate, which ensures that the after-chamber 38 is effectively mixed with the incoming gas components, possibly also with solid particles. Said effective mixing ensures that at least the afterburner 38 20 burns the unburned fuel components and does not have to be unburned. . the exhaust flue. The process described gives the heater 1 according to the invention high; ; combustion efficiency and this heater itself 1.

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However, the heater 1 according to the invention does not even satisfy the process just described. In the furnace 1 according to the invention, when the combustion and / or flue gases as well as any possible particles arrive at a higher speed in the after-chamber 3 8 to be subjected to a vigorous agitation movement as schematically indicated by arrows 52, hot gases also meet the heat pipes 45. . right up to the red glow. When additional air enters through the openings 46 at the lower ends of the fire tubes 45 through the openings 46 of the arrows 53 as indicated by the arrows 53, said additional air enhances the combustible fuel components of the combustible fuel components when entering the after chamber 38 outside the casings of the fire pipes 45. Just mentioned combustion, not only does it also keep the fire pipes at 45 high temperatures, contributes to •; complete combustion of all fuel combustible components 35 of us in the afterburner 38.

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The operation of the fire tubes 45 described above has a beneficial effect on the completeness of combustion inside the stove 1, not only in the case of continuous fire maintained in the fire chamber 28 for at least some time, but also when the fire is only ignited in the fire house 28 or The beneficial effect is due to the fact that in the early stage 5, after igniting the fire in the furnace 28, the furnace tubes 45 reach a high temperature which facilitates and completes the combustion of the combustible components of the fuel in the aftertreatment chamber 38 at the latest. high combustion efficiency at all stages of heating the stove.

However, the sauna heater according to the invention does not satisfy even the advantageous feature that the combustion efficiency of the heater is high at all stages of combustion. The goal has to be and is that the heat generated by the high combustion efficiency is also effectively transferred to the heater stones. In the sauna heater 1 according to the invention, this is achieved by an increased surface area of the hot surfaces which are close to and / or in contact with the heater stones during heating of the heater. Thus, in addition to the five hot walls of the stone space, namely the bottom, front, rear and two side walls, the outer surfaces of both fireboxes 34 and the front and top surfaces of the after chamber 38 act as hot surfaces of the furnace 49. there is no too great distance from any point in the 20 stone volume to the nearest stone space 12. . to a hot wall, is the transfer of heat by conduction and radiation to the sauna stones • ·; effective. In addition, while a portion of the previously heated air flow between the outer casing 2 of the stove and the stove body 3 can flow through openings 31 into the space between the stones, the heat transfer by convection to the sauna stones is efficient. It should also be noted that equipping the fireboxes 34 and the after chamber 38 according to the invention also allows the furnace 1 to have a large amount of heater stones without relinquishing the heat transfer to the heater stones. A large number of heater stones is advantageous when desired to provide a very smooth steam generating properties for the stove.

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An embodiment of the improved sauna heater according to the invention has been described above. It will be understood that the embodiment described may be modified within the scope of the invention. Some of the intended modified embodiments are described below.

,; It has previously been mentioned that the fire tube 45 consists essentially of a torn tube portion along the entire length of its jacket 35. The invention encompasses an embodiment wherein the fire tube 45 comprises a substantially bent portion of a tube which is suitably perforated or mesh-like material. Included within the scope of the invention, the fire tube 45, despite its designation, may also consist of a substantially planar, bent, or curved portion that is perpendicular or oblique to the gas stream entering the aftertube 38 from the bellows 34. Thus, the planar, bent or inclined portion is perforated or mesh in the region of the incoming gas stream, and at the lower edge of the planar, etc. portion, the top bottom portion 29 may comprise a plurality of smaller gas flow openings 46 or one recent replacement port 46.

Previously described, a fire tube 45 is fastened to its flange between the plate 48 and the cap 49. The invention encompasses applications in which, for example, by riveting or other suitable means, the fire tube 45 is permanently secured to its closure cover 49 or the like at its upper end stages, or in which a portion of the fire tube 45 or its similarly extending flange 45 also functions as a closure.

Previously, Figures 11 and 13 illustrate the lower end of a fire pipe 45 extending near the upper bottom portion 29 at the gas flow port 46. The invention includes an embodiment in which the lower end of the fire pipe 45 extends into the gas flow opening 46 and is possibly guided by it.

Previously described, the bell tube 34 is essentially a L-shaped portion, with a L-corner rounded. The invention encompasses an embodiment in which the corner of L is not rounded, whereby the first part 35 of the bell tube 34 is wide enough to allow a suitable gas flow. 20 dollars. The improved sauna heater according to the invention can of course handle a water tank having a water content of t! heats up when stove 1 is heated.

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Claims (10)

An improved sauna stove, which includes a fire-extinguishable fire-extinguishable door and a stone warehouse substantially above the fireplace, an upper bottom (29) defining the fireplace (28), at the top thereof, including its fireplace portion substantially symmetrical in relation to the fireplace portion. 1) vertically extending in the deep direction, middle plane (32) comprising two outlet openings (33), each leading into its own fire pipe (34) each leading to its own inlet opening (40) in a posterior chamber (38), characterized in that in the after chamber (38) there is a fire tube (45) which is open via an opening (46) in the upper bottom (29) of the fireplace (28) and at the mantle zone to the after chamber (38), while the connection to the chimney is made in the after chamber (38). 2. An improved sauna oven according to claim 1, characterized in that from and including the outlet opening (33), the fire tube (34) comprises an upwardly and slightly upwardly directed first part (35) of the sauna oven (1) and upwards and towards the sauna oven (1). ) rear curved arched part (36) and continues towards the back of the sauna oven (1) as a horizontal part. '·· (37) to the inlet opening (40) of the posterior chamber (38), from where it proceeds as an extension (41) on the midplane side (32) to an area adjacent to the posterior wall (38) 30. 3. An improved sauna oven according to claim 1, characterized in that the cross-sectional area of the fire tube (34) decreases from the outlet opening (33) towards the posterior chamber (38). 110380 12 4. An improved sauna stove according to claim 1, characterized in that the posterior walls, rear walls and lower walls of the posterior chamber are in the corresponding order part of the young body's lateral and rear walls (14, 15) and the upper bottom part (29), including the posterior chamber. (38) front walls and upper walls (39, 43) function as part 5 of the walls of the oven (1) stone magazine (12). 5. An improved sauna stove according to claim 1, characterized in that the rear chamber (38) comprises two alternative chimney connections, one of which (10) is located in the upper wall (43) of the rear chamber and the other (11) of the rear wall, which constitutes a part of the back wall (15) of the furnace body (3), the chimney connection (10 or 10 11) not in use being closed with a lid. 6. An improved sauna oven according to claim 1, characterized in that the fire tube (45) comprises a substantially vertical, downwardly open and on its casing surface with a plurality of openings provided with a generally movable part. Improved sauna oven according to claim 1, characterized in that the fire tube (45) is positioned in the rear chamber (38) through an opening (50) in the upper wall (43) of the rear chamber (38) and removably mounted in place. 8. An improved sauna stove according to claim 1, characterized in that the fire tube (45) comprises a substantially vertical, downwardly open and mainly in the form of a tube curved part, the sheath of which is perforated or mesh-like. 20 9. An improved sauna oven according to claim 1, characterized in that the fire pipes (34) are at a certain distance from each other and from the ffam wall (13) of the furnace body (3) and from the side wall (15) and their horizontal section (37) from the stone magazine (12). bottom (29), so that they are located mainly in the rock storage (12) of the furnace (1). Improved sauna oven according to claim 1, characterized in that the upper bottom part (29) in its center zone (30) is provided with a folded up. • · ·