EP1455139A2 - Window for a stove - Google Patents

Abstract

1. Viewing window arrangement (3) for a stove (1) having a combustion chamber (2), in particular a solid fuel stove, with at least two spaced apart heat-resistant glass plates (6, 6 '), the glass plates (6, 6 ') surrounding fastening frame (3') air passage openings (13, 13 ', 13' ') are provided, whereby air is passed between the glass plates (6, 6') and the air passage openings (13 ', 13 ") are arranged in such a way, that the air passed through is introduced into the combustion chamber (2). <IMAGE>

Description

The invention relates to a viewing window arrangement for a a stove with a combustion chamber, in particular a solid fuel stove, with at least two spaced apart heat-resistant glass plates, whereby in a surrounding the glass plates Mounting frame air passage openings provided through which air is passed between the glass plates.

Such a viewing window arrangement is from the US 4 163 444 A, in which four glass plates are provided are arranged so that they are spaced from one another such that three air ducts are formed. For air passage in innermost air passage duct are in the lower end section Door air inlet openings are provided, being through the innermost Air duct ducted air through air outlet openings for heating an upper cooking surface between an upper end plate of the combustion chamber and the upper cooking surface is directed. However, this results in an inadequate one Passage of the cooling air through the air ducts.

From US 5 441 036 A is a viewing window arrangement for known a stove in which several spaced apart Glass plates are provided, between which cooling air is passed becomes. The air passed between the glass plates becomes in the upper end section of the stove door via air openings derived into the environment.

GB 1 552 850 A is also a viewing window arrangement known for a stove, in which three glass plates in Are spaced from each other and cooling air through a duct is passed between the glass plates.

GB 1 531 199 A also has a viewing window arrangement for a stove with three spaced apart Glass plates with an air passage duct for cooling the Outer pane described.

In contrast, from DE 86 11 314 U is a filling door a viewing window for a heating furnace, in which the formation a permanent deposit of soot should be avoided. For this purpose there is an inner pane with a heat transfer element in connection, so that with full firing open Secondary air opening no soot deposit on the Disc forms, because the inner disc through the targeted supply of heat heated to a temperature via the heat transfer element which is above the temperature, the one Soot precipitation enables. An improved insulation effect, i.e. a comparatively cold outer pane, however not obtained.

From DE 297 07 432 U a filling door with a viewing window for a heating furnace or a heating fireplace is also known, in which the formation of soot in viewing windows with area sizes over 400 cm ^{2 is to} be avoided by covering the outside of the viewing window with a casing body. However, this also does not result in a comparatively cool outer pane.

DE 201 09 880 U, for example, is still a viewing window known for oven doors, with a glass pane on a coating on the inside facing the oven made of a special insulating material.

The aim of the present invention is now a viewing window arrangement to create for a stove of the type mentioned at the beginning, through which an unrestricted view of the fire in the Combustion chamber is possible, so that the stove has an atmosphere in it Kind of a fireplace conveyed, but at the same time on that of Outside of the viewing window arrangement facing away from the combustion chamber - opposite to traditional fireplaces - a comparative low temperature, so that a stove user longer Time can linger near the hearth without one for being exposed to uncomfortable heat.

This is the case with the viewing window arrangement of the above Art achieved in that the air vents are arranged so that the air passed into the Combustion chamber is initiated. Using the two spaced apart Glass plates result between the glass plates a kind of heat cage in which the radiated from the combustion chamber hot air is collected and by means of through the glass plates air passed back into the combustion chamber is so that on the outside facing away from the combustion chamber the viewing window arrangement a comparatively low temperature is present. At the same time is initiated by the initiation of the Air in the combustion chamber causes a soot deposit on the Avoided inside the glass plate facing the combustion chamber and thus an unrestricted view of the fire in the Combustion chamber enables. It also results from the connection the air openings with the combustion chamber in which there is a negative pressure compared to known viewing window arrangements - in which only a rise of air and thus air passage due to the between the glass plates warming airflow is achieved - much improved Air flow between the glass plates achieved because fresh air is drawn in for cooling. As a result the cooling of the viewing window arrangement significantly improved.

For the formation of a kind of heat cage between the heat-resistant Glass plates it is cheap if the glass plates have heat-repellent coatings, the coatings preferably on mutually facing inner sides of the Glass plates are provided. Usually such reflect Coatings radiation in the infrared range.

For a structurally simple design of the cooker, a easy filling of the combustion chamber as well as good insight the combustion chamber fire it is convenient if as a mounting frame a door is provided for the viewing window arrangement.

No additional air intakes on the outside of the stove to provide, and therefore not air from the Stove surrounding space for cooling purposes, at the same time however, the passage of air reliably between the glass plates To ensure it is convenient if the between air passed through the glass plates from a primary air stream is branched off to fuel the fuel.

If a control valve to regulate the flow of primary air branched air flow is provided, the between air passed through the two glass plates for cooling purposes be so that depending on the out of the combustion chamber radiated amount of heat the air passed is regulated.

If in the mounting frame of the glass plates on the of the Air outlet openings on the back of the stove, facing away from the cooker are provided, the branched from the primary air Air flow passed freely between the glass plates become.

For an appropriate cooling of the viewing window arrangement it is also advantageous if in an adjacent to the mounting frame Stove frame air through openings are provided, that are directly connected to the combustion chamber. Thus it results when providing air passage openings, through which Air passed between the heat-resistant glass plates and the air passage openings through which an air passage training is possible directly in the combustion chamber an essentially circular air flow over which the collected in the so-called heat cage between the two glass plates Air reliably back into the interior of the combustion chamber and thus is directed away from the outside of the viewing window arrangement and at the same time the penetration of heat out of the combustion chamber difficult because of the air directed directly into the combustion chamber becomes.

To unhindered the formation of a substantially circular Air flow of the warming rising air, which is passed between the glass plates to enable it is advantageous if the air passage openings are below and are arranged above the glass plates.

Furthermore, it is for cooling purposes of the viewing window arrangement cheap if inside the innermost heat resistant Glass plate a nozzle is placed over the air in the combustion chamber is routed, since the radiation emitted by the combustion chamber is thus already present Heat through the air brought in through the nozzle Interior of the combustion chamber is pushed back and thus only penetrate a reduced amount of heat to the inner glass plate can.

Tests have shown that there is a particularly good shielding effect through the air introduced through the nozzle if the nozzle is inclined, preferably at an acute angle of 45 ° - 70 °, especially from essentially 60 °, to the horizontal is directed inwards into the combustion chamber.

To a window temperature on the outside of the window arrangement to reach a maximum of 230 ° C has proven to be advantageous exposed if at least a third of the outermost of the heat-resistant glass plates spaced outer glass plate is provided.

With regard to a further improved cooling effect, at which has the smallest possible amount of heat to the outer glass plate penetrates, it is favorable if between the outer glass plate and the adjacent heat-resistant glass plate an air passage for the air flow diverted from the primary air is formed, the air flowing through into the combustion chamber is derived.

To unimpeded a union of the airflow that flows between the heat-resistant glass plates closest to the outer glass plate and the outer glass plate is passed through, and the between to achieve the heat-resistant glass plates passed through air flow, it is advantageous if the one adjacent to the outer glass plate heat-resistant glass plate only on its lateral outer edges is fixed in the mounting frame.

Fig. 1 einen Schnitt eines Festbrennstoff-Herds mit einer dreischichtigen Sichtfenster-Anordnung; und

Fig. 2 im Detail eine vergrößerte Ansicht der Sichtfenster-Anordnung gemäß Fig. 1 mit einem schematisch dargestellten Kühlluftverlauf.

The invention is explained in more detail below with reference to a preferred exemplary embodiment shown in the drawing, to which, however, it should not be limited. The drawing shows in detail:

1 shows a section of a solid fuel stove with a three-layer viewing window arrangement. and

FIG. 2 shows in detail an enlarged view of the viewing window arrangement according to FIG. 1 with a schematically illustrated course of cooling air.

In Fig. 1 is a solid fuel stove 1 with a combustion chamber 2 can be seen, which has a door 3, which acts as a fastening frame 3 'for a viewing window arrangement shown in detail in FIG. 2 4 is provided. The viewing window arrangement 4 has an outer pane 5, from which two heat-resistant, coated disks 6, 6 'are arranged.

The two coated disks 6, 6 'are also in the Spaced from each other and point to each other facing insides each have a heat-resistant coating 7 on. The coatings consist of commercially available Materials that reflect radiation in the IR range.

With the help of the two spaced disks 6, 6 'and the coatings 7 arranged on the inside is between the two disks 6, 6 'formed a kind of heat cage, in which retains the heat introduced by the combustion chamber 2 becomes. To minimize the amount of heat on the outer pane 5 to penetrate so that a user of the stove without one unpleasant heat radiation stay on the stove 1 for a long time can, an air flow 8 is passed between the disks 6, 6 '. The air that heats up is then in Arrow direction 9 again introduced into the combustion chamber 2, so that through the air passed between the disks 6, 6 ' Kind of heat shield is formed.

The one passed between the two glass plates 6, 6 ' Airflow 8 is from a (primary) airflow of the solid fuel stove 1, in a base part 11 of the solid fuel range 1 is provided. Via a control valve 12 can Air flow 10 branched from the (primary) air flow for cooling the Viewing window arrangement 3 can be regulated.

The branched air stream 10 then enters a lower one Strip 12 of the solid fuel stove, in which the Airflow 10 divides. A partial flow 10 'passes through air passage openings 13 in a stove frame adjoining the door 4 14 and via air passage openings 13 'in the back of the mounting frame 3 'inside the door 4. This Partial stream 10 'then bifurcates between the two coated glass panes 6, 6 'passed through air flow 8 and an outer between the outer pane 5 and the outer of the coated discs 6 passed air flow 10 ''.

In the upper section of the door 4 and the stove frame 14 are in turn air passage openings 13, 13 'are provided, via which the now heated air in the direction of arrow 9 into the combustion chamber 2 occurs. Some of the return air can also enter the combustion chamber directly via air passage openings 13 '', without previously passed over the inner coated disc 6 ' to become.

In order to minimize the amount of heat from the combustion chamber 2 to the To allow inner coated panes 6 'to penetrate are in the bar 12 is also provided with air passage openings 15, through which a partial flow 16 of the branched air flow 10 behind the inner coated disc 6, i.e. on the of the Outside facing away, introduced into the combustion chamber 2 becomes. The division of the branched air flow thus results 10 a substantially circular circulating Air flow through which a particularly useful cooling the viewing window arrangement 3 is achieved.

The combustion chamber is usually located inside when burning of logs as fuel has a temperature of approx. 950 ° C before, so that the inner coated disc 6 'a disc temperature of approx. 560 ° C, the outer coated pane 6 ' a disc temperature of about 350 ° C, and that of the stove user facing outer pane 5 only one pane temperature of 230 ° C, allowing a user of the stove without exposed to uncomfortable heat radiation, longer Time can remain near the cooker 1.

To avoid the heat from combustion chamber 2 in the first place to allow penetration to the inner coated disc 6 ' arranged on the bar 12, a nozzle 17, through which also part of the air flow 10 directly into the interior of the combustion chamber 2 is initiated. The nozzle 17 is about 60 ° to the horizontal inclined so that the air flow introduced via the nozzle 17 in Direction of arrow 18 is directed obliquely inwards, and thus the Heat emitted by the combustion chamber 2 from the viewing window arrangement 1 is pushed back.

Claims (13)

Viewing window arrangement (3) for a stove (1) having a combustion chamber (2), in particular a solid fuel stove, with at least two heat-resistant glass plates (6, 6 ') spaced from one another, the glass plates (6, 6') in one surrounding mounting frame (3 ') air passage openings (13, 13', 13 '') are provided, whereby air is passed between the glass plates (6, 6 '), characterized in that the air passage openings (13', 13 '') are arranged in this way are that the air passed through is introduced into the combustion chamber (2). Viewing window arrangement according to claim 1, characterized in that the glass plates (6, 6 ') have heat-repellent coatings (7), the coatings (7) being provided on mutually facing inner sides of the glass plates (6, 6'). Viewing window arrangement according to claim 1 or 2, characterized in that a door (4) is provided as the fastening frame (3 ') of the viewing window arrangement (3). Viewing window arrangement according to one of claims 1 to 3, characterized in that the air (8) passed between the glass plates (6, 6 ') is branched off by a primary air flow for firing the fuel. Viewing window arrangement according to claim 4, characterized in that a control valve (12) is provided for controlling the air flow (10) branched off from the primary air flow. Viewing window arrangement according to one of Claims 1 to 5, characterized in that air passage openings (13 ') are provided in the fastening frame (3') of the glass plates (6, 6 ') on the rear side facing away from the outside of the cooker (1). Viewing window arrangement according to one of Claims 1 to 6, characterized in that air passage openings (15) which are directly connected to the combustion chamber (2) are provided in a stove frame (14) adjoining the fastening frame (3 '). Viewing window arrangement according to one of claims 1 to 7, characterized in that the air passage openings (13, 13 ') are arranged below and above the glass plates (6, 6'). Viewing window arrangement according to one of claims 1 to 8, characterized in that a nozzle (17) is arranged within the innermost heat-resistant glass plate (6 '), via which air is conducted into the combustion chamber (2), Viewing window arrangement according to claim 9, characterized in that the nozzle (17) is directed obliquely, preferably at an acute angle of 45 ° - 70 °, in particular of essentially 60 °, to the horizontal inwards into the combustion chamber (2). Viewing window arrangement according to one of claims 1 to 10, characterized in that at least a third outer glass plate (5) spaced from the outermost of the heat-resistant glass plates (6, 6 ') is provided. Viewing window arrangement according to claim 11, characterized in that between the outer glass plate (5) and the adjacent heat-resistant glass plate (6) an air passage channel for the branched air flow (10) is formed, the air flowing through (10 '') into the combustion chamber ( 2) is derived. Viewing window arrangement according to claim 12, characterized in that the heat-resistant glass plate (6) adjacent to the outer glass plate (5) is only fixed at its lateral outer edges in the fastening frame (3 ').

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