Oven with secondary air duct

Abstract

Oven comprising a combustion chamber having two side walls, a rear wall and a front viewing window, with an air collector arranged below the combustion chamber, characterized by at least one rear wall air duct running along the rear wall or side wall of the combustion chamber and connected to the air collector, and connected to the combustion chamber in an upper region to guide secondary air along at least one side wall or rear wall into the combustion chamber.

Description

Background of the invention:

[0001] Stoves or stove inserts, hereinafter referred to as stoves, have a primary air supply, usually located below the wood, which directs air through a grate below the wood for combustion. The secondary air supply serves to provide oxygen to the wood gases produced during combustion. This secondary air is often introduced at the top or bottom edge of the stove's glass door, a process known as airwash. German patents DE 10 2009 005 178 A1 and DE 199 11 998 A1 illustrate different air routing systems for the secondary air supply. Overview of the invention

[0002] To optimize combustion, the invention includes a flame correction system that introduces air from above along the side walls, according to the claims. A stove comprises a combustion chamber with two side walls, a rear wall, and a front viewing window. It is typically a steel or cast iron box with an exhaust vent and an air inlet. Wood is loaded into the stove through a door with a front viewing window. This door can also be a corner door. An air collector is typically located at the bottom, below the combustion chamber. Additional linings are conceivable. The air collector is connected to the supply air; that is, external air can be introduced from outside or from the room in which the stove is located. This air is then directed by the air collector into the combustion chamber as primary or secondary air.Primary air is typically introduced from below via a slotted ash pan and a grate. The airflow is also controlled within the air collector using appropriate regulators and flaps.

[0003] The at least one rear air duct runs along the rear or side wall of the combustion chamber. It is connected to the air collector at the bottom and to the combustion chamber at the top to supply secondary air into the combustion chamber along at least one side wall. The rear air duct can be integrally integrated into the rear wall or be a pipe or U-profile attached to the rear wall. The rear air duct can run either on the outside of the rear wall or inside it.

[0004] Preferably, the rear wall air duct is arranged in the area of ​​the outer lateral edge of the rear wall, preferably at the outer corner with the side wall, in order to introduce the primary air from the rear wall air duct into the combustion chamber via a preferably 90-degree deflection parallel to the side wall. This arrangement can be made internally or externally.

[0005] The rear wall air duct is connected to a side wall air duct, the latter extending along the upper part of the side wall and featuring openings to direct air downwards along the side wall, preferably along a lining or inner lining. The side wall air duct can run inside the furnace or on the outside. The openings can direct air downwards directly or indirectly via other air guides. In one possible embodiment, the openings are arranged laterally, and the air is then redirected downwards by an air guide. This air guide is a retaining plate, as described below. Alternatively, in another possible embodiment, the air is introduced along the rear wall. If the air is introduced from above along the rear wall, a corresponding rear wall air duct is also present.This is connected either directly to the rear wall air duct or indirectly via the side wall air duct.

[0006] It should be noted that the side wall can be transparent with a pane, or it can be a steel side wall covered with a fire-resistant, non-transparent lining, preferably clad with fireclay, vermiculite, or cast iron, which stores energy and protects the steel. Air then flows downwards from above along the pane, lining, or cast iron, reducing soot formation and deposits while simultaneously providing secondary air. This is achieved by ensuring the flame is directed straight.

[0007] The retaining plate, mentioned above, holds the lining in the combustion chamber. It typically grips the upper edge of the lining, preventing it from falling inwards. The lining is thus pressed against the side wall of the combustion chamber and held in place. The lining usually rests on the floor, the firebrick, cast iron, etc. The retaining plate is generally attached in a removable manner. This removable attachment is achieved, for example, with screws, to allow for lining replacement. The retaining plate of the invention is preferably extended by an air distribution chamber. This chamber is connected to the side wall air duct. The air distribution chamber has downward-facing openings to introduce air from above along the lining.

[0008] In the preferred embodiment, the retaining plate has a retaining section that wraps around the cladding, with the air distribution chamber, which has downward-facing openings, being arranged on this retaining section. The retaining plate is thus formed with a cavity, or a cavity is arranged on the retaining plate. The air distribution chamber thus formed is connected to the side wall air duct. This connection can be achieved through openings in the side wall air duct and in the air distribution chamber.

[0009] In the preferred embodiment, the retaining plate has a section that connects to the side wall air duct, allowing air to enter the air distribution chamber through openings from the side wall air duct and via this section. The retaining plate has a substantially L, U, Z, or T-shaped cross-section, and one leg of the U, Z, L, or T serves as a retaining section for the cladding. In one possible embodiment, the retaining plate is Z-shaped. Parallel to this Z, an L-shaped section can be formed at a distance, thereby creating the air distribution chamber. Preferably, the air distribution chamber is arranged on the retaining section.

[0010] Alternatively, the retaining plate can have a substantially T-shaped cross-section. An L-shaped plate is positioned at a distance on the T-beam of the T. The space between the plates serves as an air distribution chamber. The L-plate can be welded to the T-beam.

[0011] In one possible embodiment, two rear air ducts are arranged on the right and left sides of the rear wall. These are connected to two side air ducts on both side walls to introduce air at both sides. The aforementioned aspects and features apply to both ducts.

[0012] In one possible embodiment, the mounting plate and the side wall air duct are integrally formed and attached together to the side wall. In an alternative embodiment, the mounting plate is screwed onto or to the air duct.

[0013] In one possible embodiment, the side wall air duct can be connected at its front end to an air duct that directs air from above onto the windshield. At its rear end, the side wall air duct is connected to the rear wall air duct. Figure description:

[0014] The invention is described below with reference to the figures. It shows: Fig. Figure 1 shows an oven from the rear with the air collector in the lower area and on the rear wall with preferably two rear wall air channels; Fig. 2a-2c show sections through the rear wall air ducts and side wall air ducts; Fig. 2b shows a section through the transition from the rear wall air duct to the side wall air duct; Fig. Figure 2c shows a transition from the air collector to the rear wall air duct; Fig. Figure 3 shows a side view of the oven with the rear air duct; Fig. 4 shows a side view of the oven with a disc on the side wall and a rear air duct; Fig. 5a and Fig. Figure 5b shows different sections through the rear wall air duct and the air collector; Fig. Figures 6a-c show different views of the retaining plate; Fig. Figure 7 shows a section through the side wall air duct with connection to the retaining plate. Detailed description of the characters.

[0015] The Fig. Figure 1 shows a furnace 1 from the rear. The furnace 1 has a fresh air intake pipe at the bottom. This pipe leads into an air collector 6. The exhaust pipe is visible at the top. The exhaust gases are routed out of the furnace 1 via the exhaust pipe. The furnace 1 has a rear wall 4 and at least two side walls 3. A viewing window 5 is usually arranged at the front. A rear air duct 7 is arranged at each of the two outer edges 8 of the rear wall 4. The rear air ducts 7 are connected to the air collector 6 at their two lower ends. This connection 15 is preferably designed to deflect the airflow by 90 degrees. The air is directed upwards through the rear air ducts 7 into the side air ducts 9.

[0016] The Fig. Figures 2a to 2c show the back wall and the corresponding air channels in different sections. Fig. Figure 2a shows a section parallel to the rear wall 4 through the rear wall air duct 7. This allows a detailed view of the preferably 90-degree connection 15 of the rear wall air duct 7 to the side wall air duct 9, and the air collector 6. Fig. Figure 2c shows in detail the connection 15 of the rear wall air duct 7 to the air collector 6. Fig. Figure 2b shows the connection 15 of the rear air duct 7 to the side air duct 9 in detail. Additional openings 13 within the side air duct 9 are visible here, through which air flows into a retaining plate 12, from which the air then flows downwards into the combustion chamber 2 along the side wall 3. The retaining plate 12 is described in detail below. Fig. 2B contains a retaining section 18 which clamps or supports a panel 11. This ensures that the side wall 3 does not tip into the combustion chamber 2.

[0017] The Fig. Figure 3 shows the invention from the side, the side being provided with an opaque side wall 3. In the Fig. Figure 4, however, shows the side with a transparent side wall 3; however, both side walls can also be transparent or opaque. Here, too, the figures show the individual air channels and the air collector 6, as well as the transition of the channels into the air collector 6 and the side wall air channel 9, respectively. It is clearly evident that only 90° air deflections are necessary here, and no complex air routing is required, thus optimizing the airflow and reducing resistance. As already explained above, the Fig. 4. A side wall 3 with a viewing window 5. The same applies to this side wall 3: the side wall air duct 9 directs air downwards over the viewing window 5. This reduces sooting of the viewing window 5.

[0018] The Fig. 5a and Fig. Figure 5b shows oven 1 from the side and from the front. Here, too, the arrangement of the individual components and the disc 5, which is formed at the front, can be seen.

[0019] Fig. Figures 6a to 6c show the retaining plate 12 in detail. The retaining plate 12 is T-shaped. The T comprises a T-beam and a stand, which is positioned at a right angle to the center of the T-beam to form the T. The air distribution chamber 17 is arranged on the T-beam. The air distribution chamber 17 has downward-facing openings 10. Furthermore, additional openings 13 are formed in the retaining plate 12 leading to the side wall air duct 9. These openings extend through the T-shaped structure of the retaining plate 12 in the upper region of the air distribution chamber 17 and pass through the T-beam above the stand. Below the stand, the retaining section 18 is formed together with the corresponding T-beam; this section serves to hold the side panel. Above the stand, the retaining plate 12 rests against the side wall air duct 9.In the upper part of the T-beam, which is not covered by the air distribution unit, there are holes through which screws are passed to be screwed into the side wall 3 in the air duct. Below these holes is the air distribution unit, with the corresponding openings 13 to the side wall air duct 9. The side wall air duct 9 can be further divided by small metal plates arranged within the air distribution chamber 17 to control and regulate the airflow across the entire area.

[0020] The Fig.Figure 7 shows a cross-section through the side wall air duct 9 and the retaining plate 12 with the air distribution chamber 17. The fastening of the retaining plate 12 to the side wall air duct 9 by screws is visible. Furthermore, the individual openings arranged in the side wall air duct 9, which communicate with the openings in the air distribution chamber 17 to redirect air downwards, can be seen. Reference symbol list 1 oven 2 combustion chamber 3 side wall 4 Back panel 5 Viewing window 6 air collectors 7 Rear wall air duct 8 outer edge 9 Side wall air duct 10 downward-facing openings 11. Covering 12 retaining plate 13 openings in the retaining plate for the side wall air duct Section 14 with connection to the side wall air duct 15 Connection of air collector to rear wall air duct 16 Connection of rear wall air duct with side wall air duct 17 Air distribution chamber 18 Stop section

Claims

[1] Oven comprising a combustion chamber having two side walls, a rear wall and a front viewing window, with an air collector arranged below the combustion chamber, with at least one rear wall air duct running along the rear wall or side wall of the combustion chamber and connected to the air collector and to the combustion chamber in an upper region to supply secondary air along at least one side wall or rear wall into the combustion chamber, wherein the side wall is provided with a refractory non-transparent lining, and preferably lined with fireclay, vermiculite or cast iron, wherein the rear wall air duct is connected to a side wall air duct, the side wall air duct extending along the side wall in the upper region of the side wall and having openings to introduce air downwards along the side wall, characterized by, that a retaining plate which holds the lining in the combustion chamber is connected to the side wall air duct and has downward-facing openings to introduce air from above along the lining. [2] The oven according to the preceding claim, characterized by that the rear wall air duct is arranged in the area of ​​the outer edge of the rear wall or side wall, preferably at the outer corner to the side wall, in order to introduce the primary air into the combustion chamber via a 90 degree deflection from the rear wall air duct parallel to the side wall or rear wall. [3] The oven according to the preceding claim 1, characterized by , that the retaining plate has a retaining section that wraps around the cladding in some areas, wherein an air distribution chamber is arranged on this retaining section, which has downwardly directed openings. [4] The oven according to the preceding claim, characterized bythat the air distribution chamber is connected to the side wall air duct. [5] The oven according to the preceding claim, characterized by that the retaining plate has a section that connects to the side wall air duct, so that air enters the air distribution chamber through openings from the side wall air duct. [6] The oven according to any one of the preceding claims 1 or 3-5, characterized by , that the retaining plate has an essentially L, U, Z, or T-shaped cross-section, and one of the legs of the U, Z, L, or T serves as a retaining section for the cladding. [7] The oven according to any one of the preceding claims, characterized by , that two rear wall air ducts are arranged on the right and left of the rear wall and are connected to two side wall air ducts on both side walls to introduce air on both side walls. [8] The oven according to any one of the preceding claims, characterized bythat the side wall has a disc which is located below the side wall air duct. [9] The oven according to any one of the preceding claims 1 or 3-8, characterized by that the retaining plate and the side wall air duct are integrally formed, or that the retaining plate is screwed onto the air duct.

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