Closing device for a furnace opening

p0001The invention relates to a closure device for furnace openings, especially in stoves, masonry heaters and stoves, with a bounding the opening frame and the like with this frame via a hinge. associated door which consists of two spaced-apart plates, said lateral opening into the air space between the two plates of circulation ports are provided.

p0002In conventional closure devices for tile stoves or similar, both the frame and the door made of metal, so from a good heat conducting material, which assumes high temperatures during operation of the tiled stove. This is disadvantageous as to the operator the risk of contracting upon opening and closing of the door burns, even if the handle is made for a locking device of a heat insulating material. In addition, there is a risk that items that come accidentally on the hot door to complex inflame.

p0003It is also known to provide an inner door and a separately opening of outer door in the frame, the inner door may be formed like a grid. Even so can not avoid the disadvantages mentioned.

p0004In closing devices for stoves, it is already known to form the door of a refractory glass. Through this glass the coals and the flame in the furnace interior is visible, creating a homey impression is given, as is the case with open fireplaces. Even in these known closure means take the glass door, and especially of the glass enclosing metal frame high temperatures.

p0005From US-A-4 041930 a furnace door is known which comprises two in spaced-apart glass plates which are joined together at their circumferential edge with a space between the two glass plates bridging frame. In this context, opening into circulation openings are provided in the space through which air can circulate freely between the two plates. In this known construction, although, the outer glass plate on a lower temperature than the interior of the furnace facing towards the glass plate, but the heat transfer between the glass plates by the frame made of metal indeed favored, whereby in any case the frame itself takes considerable temperatures. In addition, the circulation of air in the space between the two plates is dependent on the size of the circulation openings in the frame and therefore limited.

p0006The present invention has for its object to provide a closure device for furnace openings, which avoids the aforementioned disadvantages, in particular the temperatures occurring on the outside of the door can be kept low. To achieve this object, the invention, starting from a closure device of the type described above, in that the two plates are frameless formed and only connected to each other at certain points via spacers, and that only those of the frame facing towards inner plate is sealed to the frame , This configuration has the advantage that heat transfer between the two located from each other in distance plates is virtually completely suppressed, since the panels are joined together only at certain points on the spacers. Since only the rests of the frame facing towards inner plate on the frame, direct heating of the outer panel is prevented by the frame. Characterized in that the outer plate is connected only at certain places via spacers with the inner plate and is not applied to the frame, an intensive air flow is ensured in the space between the two plates, whereby the exposed directly to the radiant heat from the furnace interior, towards the door frame sealed inner plate is cooled, so that by this means also a heat transfer from the inner panel to the outer panel is largely suppressed and this outer plate thus takes on the outside with a relatively low temperature. The risk of burns when touching the outer plate and the danger that ignite adjacent objects at the outer plate is thus no longer available.

p0007The spacers may be offset inwardly from the plate edge from, so they do not interfere, and an elegant appearance of the door is ensured.

p0008According to a preferred embodiment of the invention, the spacer via a preferably frame-shaped designed connecting element are connected together, on which the hinge or the like. is set. This slight, weight-saving and attractive design is achieved. In addition, the large-area flat panels are easy to clean.

p0009The connecting element may be hiebei, however, arranged between the two plates at a distance from these plates, so that it is not disturbing and does not hinder the cleaning.

p0010According to an advantageous embodiment of the closure device according to the invention, the two plates of frameless panes of fireproof glass, for example, ceramic glass. Thus, the flame or embers in the combustion chamber is visible, which gives a comfortable feeling and a larger clear glass cross section and thus a larger viewing area results.

p0011At least one of the discs, preferably the outer pane can hiebei be provided with a heat-reflecting layer, for example, an oxide coating, which brings with it the advantage that the combustion chamber is less heat loss occurs and the on the outside of the door, so to outer disk, temperature occurring is reduced in the desired way even further.

p0012The use of glass makes it possible further to provide at least one of the discs with a decor, for example, with a graphic decoration. If desired, can hiebei a frame-shaped, semi- or full-surface decoration, a point or line grid may be provided, but it can also be applied figural representations. Such decoration can be produced by blasting with Korundperlen, etching, or printing (e-mail printing) and covers some of the measures provided for between the two discs spacer and the connecting element.

p0013In the drawing the invention using an exemplary embodiment is illustrated schematically. 1 shows a closure device according to the invention in plan view. Fig.2 is a vertical section through the closure device according to the invention along the line II-II in Figure 1 and Figure 3 shows a horizontal section along the line III-III in Figure 1 illustrates.

p0014On the outside of a furnace 1, for example of a tiled stove, is located with the interposition of a seal 2 on a Z-shaped frame 3, which is sealed by a further seal 4 in relation to the lining 5 of a combustion chamber. 6 Which consists of steel or cast iron frame 3 is fixed via screws 7 in the wall of the combustion chamber 6 provided in the anchoring elements 8, but may be fixed in other way.

p0015With the border 3 a generally designated 9 door pivotally connected and fixed in its closed position by a locking device 18th The door 9 consists of an inner panel 10 and from a connected to the inner plate 10 only via spacers 11 outer plate 12. Both plates 10,12 are made of panes of fireproof glass and are designed frameless. The inner plate 10 is opposite the frame 3 is sealed in the closed position of the door 9 by a refractory seal. 13 The attachment of the two plates 10,12 to the Abstandhaltem 11 via the spacer 11 used, holes in the plates 10,12 passing through screws or rivets 14. The attachment is within the margin of the plates 10,12.

p0016The spacers are only at individual points of the plates 10,12 with d connected iesen. In the illustrated embodiment of the four panel corners such spacers 11 are provided only in the region. Thus, it can allow air to enter the space between the two plates 10,12, 15 along the disk surfaces flows in the direction of the arrows to move up and thereby the inner plate 10, which is directly exposed to the radiant heat from the combustion chamber 6, cools and the heat transfer substantially reduced on the outer plate 12, so that this outer plate 12 assumes no high temperature. With the spacers 11, a frame-shaped designed connecting element 16 is connected, to which a pivotal movement of the door 9 with respect to the frame 3 allows end hinge is attached 17th Further, the frame-shaped connecting element carries the aforementioned locking device 18, over which the locking of the closed door 9 can be performed on the frame 3rd

p0017The outer, consisting of a glass plate 12 may be at the space between the plates facing page, equipped with a heat-reflecting layer, for example, an oxide coating, through which the heat is reflected back into the combustion chamber. 6 Thereby, the heat loss is reduced from the combustion chamber. 6 In addition, both consisting of the glass plates 10,12 or even one of these plates with a graphic decoration can be provided, which can be applied by blasting with Korundperlen, etching, or by e-mail printing. The decor can be designed according to the wishes of the user. It may also consist of a caption or a pictorial representation.