DK9300106U3 - Fireplace for home heating (space heating) with solid fuel (wood, coal, lignite, peat, fuel pellet) - Google Patents

Description

-1- DK1993 00106 U3

Description.

Designation: Woodburning stove.

Scope of production.

This generation relates to a wood stove. The stove is used for space heating of homes.

Prior art.

Wood stoves have long been known. These work by placing fuel on a grate or simply in the bottom of the furnace, after which air is fed into the furnace below, through an adjustable opening, such as under air for combustion. Some stoves are also provided with an adjustable opening higher up on the stove from which overhead air can be allowed to burn. This combustion method causes combustion to occur from all the fuel that has been put in at the same time. This means that stoves of this type have to be refueled frequently and in small quantities at a time to avoid smoke from the chimney.

From French publication publication there is also known a wood-burning stove where the combustion takes place directly under the fuel and with slots close to the fuel. A similar structure is known from French Publication No. 2592944, but here the gaps are deep.

With the production, it is desired to provide a stove of the type with combustion under the fuel and with a particularly advantageous damper.

Wood stoves, of the type described in the French patents mentioned above, must be able to refuel with larger quantities without burning them quickly and increasing the heat output from the stove so that the stove can be refilled less frequently. At the same time, combustible gases are collected so that combustion can be done more safely, to improve the efficiency of the furnace and to reduce the damage caused by incomplete combustion. The combustion gases are collected and incinerated in one or more narrow slits, through which the ash from the combustion also passes into the ash drawer. This or these slots are located directly under the fuel reservoir, after which the hot flue gas is discharged to the heater surfaces and chimney draft and no longer comes into contact with the fuel.

The new technique.

The stove is fitted with a smoke outlet plug, in which a reversible damper is arranged to control the flue gas, so that the combustion in the stove can be either through combustion or as under-combustion. The stove is equipped with two air dampers for lower air (primary air) and upper air (secondary air) respectively. The stove is fitted with two close-fitting doors. The upper one is intended for fuel insertion. The lower one is intended for the extraction of soot and ash.

The technical impact.

By using the above-mentioned dampers in connection with the prior art, the combustion, when the smoke damper is in position u_ (Figure 4), can take place downwards as previously mentioned in the French patents. This damper position is used for long-term operation.

If the smoke damper is turned to position g (Figure 4), the flue gases can escape the slit combustion, and now the production functions as the known stoves as first described. This damper position is used during the ignition phase. When the combustion is started, the damper is turned to position Uj so the combustion takes place as previously mentioned. Smoke damper position g can also be used for short-term operation or low flame.

-2- DK1993 00106 U3

List of Figures.

Figure 1 shows the production from the front.

Figure 2 shows the cross sectional view.

Figure 3 shows the production seen in longitudinal section.

Figure 4 shows the production smoke damper.

Examples of embodiment: Figure 1 shows the front view with smoke extractor with damper at the top. The upper door with air intake for combustion is intended for refueling. The lower door with sight glass is intended for monitoring the flame. The lower air intake is for air supply to the combustion.

Figure 2 shows a cross section of the production. At the top is the smoke damper, then the relatively large-fuel magazine, which contains a bit of firewood, which is burning. You can see how the combustible gases are collected and burned in the gap under the magazine. Below the slot is the ash tray, shown with a bit of ash in. The shaded area shown in the figures is of ceramic refractory material. Below is a wavy area symbolizing insulation felt.

In Figure 3 it can be seen that the smoke damper blocks the flue gas so that it must pass through the gap, after which the draft of the chimney leads the smoke backwards and up to the opening of the smoke dam, where the smoke leaves the production. A ventilated cavity is located between the reservoir and the flue, to keep the temperature in the fuel reservoir.

Figure 4 shows the smoke damper in longitudinal section in its two positions.

In position u, the damper is set so that combustion in the production takes place as previously described.

In position g, the damper is turned so that the flue gas can escape the slit combustion, and now the production functions as the known stoves with through combustion.

Claims (1)

1. Furnace for domestic heating (space heating), which consists of a ceramic refractory walled metal furnace for combustion of wood, etc., where the combustion can take place in one or more narrow slots close to the fuel in the fuel reservoir or above the fuel depending on the smoke setting, that a flap is placed in the flue outlet which is turned in the first position so that the flue gas can escape the combustion, as in a traditional stove, and which is turned in a second position so that the flue gases are led under the fuel to the oven's heating surface and up past the damper in the smoke outlet.