FI105948B - Charging fireplace - Google Patents

Abstract

Heat storing fireplace comprising a firebox (2) provided with a grate (1) and a combustion space (3) above it, side channels (4,6) on both sides of the firebox and combustion space, leading to a chimney flue, heat storing material (5) placed above the combustion space, throat apertures (11,12) opening from the combustion space below the heat storing material for passing the combustion gases into the side channels, and a circulation channel (7) disposed around the heat storing material for passing hot gases around it. The circulation channel (7) forms a combustion gas channel surrounding the heat storing material (5) by its sides and top. In addition, the fireplace is provided with at least one flow controller (8, 9, 10) for directing the combustion gases asymmetrically into the side channels (4,6) so as to produce a circulating flow in a certain direction in the circulation channel (7). <IMAGE>

Description

105948

RESERVED TULISION

The invention relates to a charging fireplace as defined in the preamble of claim 1.

Particularly in fireplace baking ovens, but also in other charging fireplaces, there is a heat-storing mass above the furnace, around which the hot combustion gases must circulate long enough to effectively transfer heat to the fireplace.

10 Traditionally, this has been implemented in a particular fireplace baking furnace structure in which the flue gas is not circulated or burned in fire, so that the flue gases flow from the top of the combustion chamber to the rear and to the rear of the heat storage oven. through the cheek channels.

This solution is efficient and effective in terms of heat storage and combustion efficiency. High frying ·; ' space with this structure requires a relatively large

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20 amount. At the same time, high heating power is obtained, which is an advantage when efficient heating is desired. Arraying is not a disadvantage when heating energy can be efficiently utilized.

The prior art is characterized by the bulk, particularly the relatively large depth, of the fireplace, which is mainly due to the space required by the charge mass and the flue gas riser behind it. Often, the space reserved for the fireplace is limited, or the product is to be placed in a smaller room 30, where the need for heating power is not so great, but good cooking properties are still desired.

It is an object of the invention to provide a novel charging fireplace which is smaller in size and weight than similar prior art firing fireplaces, but which has substantially the same operating characteristics as the prior art, although the roasting space or other than in the state of the art fireplace baking ovens.

As regards the features characterizing the invention, reference is made to the claims section.

The storage hearth according to the invention comprises a firebox with a grate and a combustion chamber above it. On both sides of the furnace and combustion chamber there are downward ducts leading to the chimney. In addition, above the combustion chamber is a heat-retaining mass. A further 10 fireplaces have a circulation duct for circulating heat-retaining mass, which appropriately directs the hot combustion gases around and out of the mass. According to the invention, a drainage opening beneath the pulp opens only into one of the buccal ducts to suitably direct the flue gases directly down into the second buccal duct and through the circulation duct into the other buccal duct.

Thus, for the charging fireplace according to the invention, it is essential that no smoke ducts 20 increasing the depth of the fireplace are needed behind the heat charging mass, but that the ducts only circulate the heat charging mass on its sides and on top. Thus, asymmetric flue gas flows are suitably provided to the cheek ducts so that the desired circulating flow is achieved. Asymmetry as used herein refers to flue gas streams of pos-25 ducts of different magnitudes, flow path lengths and / or temperatures. Thus, the flue gases can pass from the pharynx as a portion passes directly from the pharynx into the buccal duct and circulates as a portion around the mass into the other buccal duct.

. As the heat-retaining mass on top of the furnace and above the combustion chamber, different components can be used according to the desired function on a case-by-case basis. If only a heat-absorbing but as low as possible 35 fireplace is desired, the heat-storing mass may be, for example, a relatively low soap-wool. A heat exchanger made of soapstone or a suitable metal may also be used as the heat-retaining mass, whereby a suitable air or liquid circulation may be present.

In one embodiment of the invention, the heat-storing mass is an oven with a door opening to the outside of the fireplace, with the flue gases circulating only outside the oven. The furnace jacket, or heat reservoir mass, is preferably soapstone, but other materials such as metal may also be relevant. It is also possible that the door opening outwards from the hearth is arranged in the space between the heat-storing mass and the furnace so that the oven is formed by the downwardly open upper part of the furnace.

The oven door may open in the same direction as the mouth or on the opposite side of the oven door. The hatches may also be at an angle of, for example, 45, 90, or 135 degrees to each other, whereby, in addition to vertical cheek ducts, horizontal duct portions may be used to move the vertical ducts laterally to a suitable location for flue gases.

The fireplace according to the invention has the advantage over the prior art, in particular, of the lightness of the structure, despite its good heating properties. Since no upward or downward flue gas ducts are required behind the stock, the total fireplace depth is significantly less than the corresponding known fireplaces. This significantly reduces the floor area required by the fireplace, the total weight of the fireplace, the number of parts needed in the fireplace and thus the cost of purchase and installation.

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The structure can also be advantageously implemented as retrofit for existing fireplaces, particularly soapstone fireplaces w, but also for fireplaces made of other materials, since the structures have common lower parts of the fireplace, whereby the upper part can be optimized according to the application.

4, 105948

In the following, the invention will be described in detail with reference to the accompanying drawings, in which Fig. 1 illustrates a reservoir 5 according to the invention, Fig. 2 illustrates another embodiment of the invention, and Fig. 3 shows a side view of Fig. 2.

1, the combustion chamber 2 with a grate 1 and a combustion chamber 3 above it are delimited by massive soapstone partitions 18 and 19 on the sidewall. The massive soapstone plate 15 15 serving as a heat reservoir 15 .

The entire fireplace is surrounded by a massive soapstone outer jacket 20. In addition, a double stone 21 may be used on the inner surface of the outer jacket, which may be soapstone or a suitable refractory material having a lower thermal conductivity than soapstone to retain heat in the oven.

Thus, a cheek channel 4 and 6 is formed between the outer sheath 20 and the partition walls 18 and 19, as well as the circulation channel 7 surrounding the flow shield plate 15 and the outer sheath 20 only around the sides and top.

In the embodiment of Figure 1, the combustion gases can only flow from the combustion chamber 3 through the drainage opening 12 on one side. Thus, part of the combustion gases 30 flow directly to the side of the side flues 6 and down along part: the combustion gases flowing through the circulation flow circulation channel 7 in the second side flues 4.

Figure 2 is a sectional view showing another embodiment of the invention having substantially the same * 35 basic parts as in Figure 1. They are also numbered with the same numbers. In this embodiment, a charging massapa 5 is used inside the oven chamber 16. Also, in this embodiment, 5 105 948 the combustion gases to flow into the combustion chamber 3 only on one side of the drain hole 12 through the part of the combustion gases flows directly to the side of the side flues 6 along the bottom and the combustion gases member 7 through the circulation passage, the circulation-5 stream flows to the second Chicken-but 4.

Figure 3 is a side elevational view of the embodiment of Figure 2. As can be seen from the figure, the circulation duct according to the invention, which circulates the charge mass 5 only on the sides and top, and because of the circulating flow therein, there is no need for smoke ducts behind the oven 16. In this way, the depth of the entire structure is relatively small and the floor area required by the fireplace is small.

The invention has been described above by way of example with reference to the accompanying drawings, in which various embodiments of the invention are possible within the scope of the claimed inventive concept.

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Claims (4)

105948 6 1. A storing fireplace comprising: - a firebox (2) with a grate (1) and a combustion chamber (3) above it, 5. a duct (4,6) extending downwards on both sides of the furnace and combustion chamber, 5) and - a side and top circulation duct 10 (7) for directing hot gases around the pulp, characterized in that a suction opening (12) opens from the combustion chamber (3) below the pulp (5) to suitably direct directly downward to the other. to the cheek duct (6) and through the circulation duct (7) to the second cheek duct (4). Fireplace according to Claim 1, characterized in that the heat-storing mass (5) has a uniform soapstone mass (15). Fireplace according to Claim 1, characterized in that the heat-storing mass (5) is an oven (16) with an opening that opens outside the fireplace. Fireplace according to one of Claims 1 to 3, characterized in that in the space between the heat-storing mass (5) and the furnace there is an outward opening opening. • · * 9 7 105948