FI123341B - Control structure - Google Patents

Description

FIELD OF THE INVENTION

The invention relates to a guide structure as defined in the preamble of claim 1.

BACKGROUND OF THE INVENTION

In fireplaces and other similar fireplaces, the surface of the fireplace is often painted metal. The painted metal plate above the hatch structures of the Tu-10 add-on heats up strongly. This is due to the hot air flow up the surface of the door into the surface sheath and the heat radiation of the door structures, which is partially directed directly towards the metal plate. 15 Due to this strong warming, the metal sheath cannot be painted with standard metal paints, but requires the use of expensive and heat-resistant special paints. In addition, hot air currents and thermal radiation cause the metal plate, particularly when painted light 20, not to remain discolored, but to darken and thereby quickly become unclean. An extremely hot outer jacket immediately above the hatch is also a safety hazard.

Prior art in the field of the invention is disclosed in US 346267 and US 2004069296. A simple plate or rib is known from

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mounted above the oven door to direct the hot air flows cvj V outwardly from the furnace surface structure.

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OBJECT OF THE INVENTION

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The object of the invention is to eliminate the above mentioned drawbacks of O) S prior art. In particular, it is an object of the invention q to provide a novel solution, by means of which a metal plate 2 of a fireplace mantle can be painted with ordinary paints and nevertheless maintain a clean and unchanged color.

SUMMARY OF THE INVENTION

The guide structure according to the invention is characterized in what is set forth in claim 1.

The control structure according to the invention is intended to control the heat flows due to the heating of the door structure of the fireplace with a metal outer sheath. According to the invention, the guide structure comprises, above the hatch structure, two ribs extending outwardly from the outer jacket and extending substantially outwardly from the outer jacket. Thus, it is essential for the ribs that they are not part of the hatch structure, but that they are above and separate from the hatch structure. Thus, they do not become as hot with the hatch structure 20 and radiate heat to the same extent as the hatch structure. The fins control the flow of hot air, which is heated on the surface of the hatch structure and rises upwards, outwards from the housing. Similarly, the fins prevent the heat radiation emitted from the hot hatch structure so that it cannot be directly exposed to the outer jacket.

Further, the fins guide the trees into the furnace when adding flue gases that may rise from the open door

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cvj away from the furnace jacket so that the jacket will not soot. The ribs are suitably similar in shape with a gap of the same width across their entire surface area x. With only one bar, the rising hot air flow is well controlled and (O) at a distance from the surface of the metal sheath, but the heat radiation emitting the hatch is more efficiently stopped for 35 min by two bars between the air gap.

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In one embodiment of the invention, the guide structure is attached to the outer mantle of the fireplace at the upper edge of the opening for the hatch structure. Another possibility is that the guide structure is attached to the outer surface of the outer sheath, that is, immediately above the opening mentioned above, to the outer sheath.

In both of the above applications, the guide structure 10 is detached and separate from the hatch structure, but on the other hand as close as possible to the hatch structure, i.e. a short distance from the hatch structure with an air gap between them.

15 The air gap may be free, that is, empty or may be provided with suitable insulation. It is essential that the metal hatch structure and the metal fin are not in direct contact with each other so that heat can be transferred unhindered from the hatch structure to the rib.

In one embodiment of the invention, the rib is a horizontal and planar plate. The rib may also be a planar bevelled, i.e. upward or downwardly inclined plate. The rib 25 may also be an upwardly or downwardly curved plate. Preferably, however, the rib is a uniformly thick sheet having a constant width throughout its length.

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, Relatively thin; and the narrow plate-like rib is functionally sufficient to prevent direct thermal radiation and T-guide the rising hot air flow outward from the front of the importer. However, design considerations may also determine other shapes of the line used, such as rectangular profile, semicircle profile,

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However, what is essential for the slat is its reach over the entire width of the door and its sufficient outward extension so that it both controls the rising 4 airflow and prevents direct heat radiation to the front face of the fireplace.

The control structure according to the invention has significant advantages over the prior art. With the guide structure of the invention, hot air currents rising upwardly along the surface of the fireplace door are directed outwardly from the mantle of the fireplace. Likewise, when opening the door, it controls the rising flue gases away from the front surface of the fireplace so that the front surface does not soot. In addition, it prevents direct heat radiation from the door structures above the fireplace mantle. This prevents the metal mantle of the fireplace from overheating. This eliminates the need for expensive special paints in the metal sheath and also keeps the color constant and clean. Further, the control structure increases the safety of the fireplace as the hot surfaces of the fireplace are reduced.

2 0 LIST OF PHOTOS

In the following, the invention will be described in detail by way of example with reference to the accompanying drawings, in which Figure 1 shows a guide structure according to the invention and Figure 2 shows a sectional view of another embodiment of the invention.

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DETAILED DESCRIPTION OF THE INVENTION

Figure 1 shows a guide x structure according to the invention installed in a fireplace. The fireplace has an outer shell 2 of painted metal sheet 1 having an opening 4, which is intended to fasten the skeleton of the fireplace. Prior to attaching the hatch structure to the upper edge of the opening o 35, a guide structure according to the invention is attached. The guide structure has two ribs 3, which are 5 horizontal and plate-like pieces extending across the entire width of the opening 4. The ribs are approximately 5mm thick and 50mm wide and have a length corresponding to the width of the hatch structure of the top 5 mounted below them, i.e. approximately the width of the opening 4. The ribs 3 are vertically spaced apart, i.e., overlapping to form an approximately 5-rib gap 5, or air space.

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Figure 2 shows another embodiment of the invention. Therein, a U-profile 11 is secured to the outer surface of the outer mantle 2 of the fireplace, just beside it, adjacent to the opening 4 for the hatch structure 1 so that its sa-15 spindles extend outwardly from the outer surface to form two overlapping ribs 3.

The control structure according to the invention shown in the figures works as follows. As the fireplace is heated, the hatch structure 1, i.e. both the frame 7 and the hatch 8, becomes very hot. The hot hatch structure radiates heat strongly. Radiation is directed in all directions from the hot surface towards the next solid structure. Because of the guide structure of the invention, i.e. two or more ribs, above the latch 25, the heat radiation from the latch structure collides with the ribs and does not reach the fireplace painted overlay sheath above.

'Z 30 x The hot hatch construction also causes the

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the pin rises upwards hot air flow. Without the rib structure according to the invention, the hot air would warm the painted outer casing of the furnace above. Instead of the ribs 35, the fins direct the hot rising air flow outwards from the outer mantle of the fireplace. In this way, the hot rising air stream 6 does not over-heat the painted outer jacket, but remains cooler due to the effect of deflecting the air currents away.

5 While still opening the hatch to add trees, it is very possible that the open hatch will emit flue gases into the room. However, due to the fins, the flue gases do not touch the front of the fireplace, but rise farther away. This is how the front surface of the fireplace thinks when it stays clean.

In the foregoing, the invention has been described in detail by way of example, with various embodiments of the invention being possible within the scope of the claimed invention.

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Claims (7)

A guide structure for controlling the heat flows of a fireplace door structure with a painted metal outer jacket, characterized in that the guide structure comprises at least two ribs (3) extending vertically from the surface of the door panel (1) and extending outwardly to direct the rising hot air flow outwardly from the outer jacket and to prevent direct thermal radiation of the hatch structure to the outer jacket. Guide structure according to claim 1, characterized in that the guide structure is attached to the outer shell (2) at the upper edge of the opening (4) of the hatch structure (1). Guide structure according to claim 1, characterized in that the guide structure is attached to the outer surface of the outer jacket (2). Guide structure according to one of Claims 1 to 3, characterized in that the guide structure is at a distance from the hatch structure 25 with an air gap (5) between them. CM A guide rack structure according to any one of claims 1 to 4, characterized in that the rib (3) is a horizontal and planar plate. X The guide rails structure according to any one of claims 1 to 4, characterized in that the rib is a planar O) 'inclined plate. 5 35 CM Guide structure according to one of Claims 1 to 4, characterized in that the rib is an upwardly or downwardly curved plate. 5 c \ j δ c \ j i c \ j X CC CL m O) oo m δ c \ j