RU2738613C1 - Bath-house furnace - Google Patents

Abstract

FIELD: furnaces and ovens.

SUBSTANCE: invention relates to furnaces intended for installation in baths and saunas for heating and maintaining required temperature and humidity in a steam room. Bath furnace contains a furnace unit, an ash pit, a subarea and a grate. Furnace unit consists of two parts made of cast iron, the upper semi-housing with the flue outlet branch pipe and the lower half-case. Slots are made on mating surfaces of half-cases to accommodate refractory cord, and all joints of half-cases are treated with heat-resistant sealant. At least two heat-removing fins pass on outer side of each half-case. Firing unit walls thickness with tolerance ±1 mm varies from 6 mm to 12 mm, making 10 mm at side walls of furnace unit, and in place of presence of ribs is 12 mm.

EFFECT: technical result is uniform heating of furnace, improved heat release, economical mode of fuel consumption and higher efficiency.

8 cl, 1 dwg

Description

The invention relates to stoves designed for installation in baths and saunas, for heating and maintaining the required temperature and humidity in the steam room.

The closest analogue is a bath stove (RU 150387 U1, F24B 1/24, published on February 20, 2015), which contains a body, a portal installed on the front side of the body, a firebox located in the body, a metal bed for stones located above the firebox and consisting of three sections, a chimney, in which each of the sections of the metal bed has the shape of a hollow open top inverted truncated pyramid with a rectangular base, the sections of the metal bed are connected by long upper edges, while a flame arrester is installed under the chimney, which ensures the movement of gases along the metal bed.

The disadvantage of this furnace is a large number of components, which reduces the manufacturability when assembling the furnace structure, and also creates a large number of joints through which flame or flue gases can break through. Also, equal over the entire plane thickness of the walls of the furnace leads to excess mass and material consumption of the device.

The objective of this invention is to eliminate the disadvantages of the prototype, as well as to create a reliable and trouble-free heating device (furnace).

The application of the claimed invention provides the following technical results: uniform heating of the product due to the use of a cast-iron furnace, improved heat transfer due to the presence of heat-dissipating fins, economical fuel consumption and a favorable moisture regime, reduction in the weight of the structure without loss of strength due to the presence of evenly spaced stiffeners on the surface of the half-shells with a simultaneous increase in efficiency due to a more complete use of thermal energy due to the uniform placement of the ribs in the places of thickening of the half-shells, which ensures stable parameters and uniformity of the heat flow.

These technical results are achieved due to the fact that the bath stove contains a combustion unit, an ash pan, an ash pan and a grate, the combustion unit consists of two parts made of cast iron - an upper half-body with a chimney outlet and a lower half-body, grooves are made on the abutting surfaces of the half-bodies, into which a refractory cord is laid, and all the joints of the half-shells are treated with a heat-resistant sealant, at least two heat-dissipating fins extend on the outside of each of the half-shells, and the wall thickness of the combustion unit with a tolerance of ± 1 mm varies from 6 mm to 12 mm, being 10 mm at the side walls of the combustion unit, and in the place of the presence of ribs is 12 mm. And the ribs are made with an equal distance from each other and from the front and rear edges of the combustion unit, and, preferably, the number of ribs is equal to four. A baffle tooth is installed in the design of the combustion unit. And the grate is removable and installed on the protrusions made in the lower half-body. An ash pan is attached to the lower half-body under the grate. The sauna stove is equipped with a combustion tunnel, and the abutting surfaces of the combustion unit with the combustion tunnel are made along the perimeter with pockets or grooves in which a refractory cord is laid, and also refractory sealant and hardware connections are used for joining. A stone grid is installed around the combustion unit.

Brief description of the drawing.

FIG. 1 shows a model of a sauna stove, where:

1 - Upper half-case

2 - lower half-case

3 - Furnace tunnel

4 - Podzolnik

5 - Ash pan

6 - Tooth chipper

7 - grate

8 - Firebox door

9 - Grid for stones

10 - Heat dissipating rib

In the structure of the firebox, a “chipper tooth” (6) and a grate (7) are installed. The grate (7) and the baffle tooth (6) are made of gray cast iron or ductile iron, a material resistant to temperature extremes, slightly susceptible to scale formation and thinning during fuel combustion. The grate is removable and installed on the protrusions made in the lower wall of the lower half-body. An ash pan is attached to the lower half-body, directly under the grate. The podzolnik can be made of stamped steel sheet or cast from cast iron. Ash pan and ash pan are designed for easy ash extraction and regulation of air supply to the burning fuel.

In the process of manufacturing the furnace, the method of "wall thickness variation" was used, where the wall thickness varies from 6 to 12 mm, which will lead to a decrease in the mass of the structure without loss of strength. The internal design of the combustion space allows to increase the efficiency due to a more complete use of the thermal energy obtained from fuel combustion. This effect is also achieved by directing heated gases through channels made in the upper part of the furnace.

To ensure safe operation of the furnace, a combustion tunnel (fuel channel) and a cast-iron door are provided in the design. The tunnel allows you to heat the stove from a room adjacent to the steam room and serves to "pass" through a non-combustible wall. The cast iron door serves as an excellent insulator, it consists of a frame and a leaf, which is equipped with fire-resistant tempered glass, a hook-shaped locking device and an air blower with a handle with an air supply regulator for controlling the air supply to the furnace section and regulating the fuel burning rate. Below the furnace are located: ash pan and ash pan, necessary for easy ash extraction and regulation of air supply to the burning fuel.

The stove can be equipped with a grid for stones, which serve as additional elements for heating the bath room and for the production of steam.

The design of the furnace is a single element of the furnace unit (furnace) assembled from two cast iron (main) furnace elements by bolting and using a refractory cord in specially organized grooves - “pockets” and additionally treated with a heat-resistant (high-temperature / refractory) sealant. The furnace is delivered assembled for sale. Therefore, the "human factor" is completely excluded during further assembly of the furnace. In the lower part of the furnace firebox there is a grate (7) in a specially provided seating recess. The furnace tunnel (3) is a thick-walled metal element with a door fixed to it, through which the furnace is fired. The combustion channel is fixed directly to the combustion unit by bolting (hardware connections), and the mating surfaces of the combustion unit with the combustion tunnel are made along the perimeter with pockets or grooves in which a refractory cord is laid, and a refractory sealant is used for joining. Around the perimeter of the combustion unit, there is a rounded outer casing for placing stones in it.

The connection of the main elements of the furnace is made using a bolt connection along the perimeter of each element. Each of the two elements has a recess around the perimeter of the element, used for laying the refractory cord. The structure of the combustion unit is supplied assembled (two elements are assembled and bolted together).

The walls of all elements of the combustion unit are made of gray or ductile iron and have different material thicknesses, which is due to different temperature loads on each element: high-tech design with improved efficiency. Additionally, in places where heat sink fins are present, the wall thickness is 10-12 mm (due to the cast iron method). The casting tolerance for wall thickness of all parts is ± 1 mm. The presence of heat-dissipating fins allows more efficient heat removal from the heated firebox, prevents the firebox from overheating, significantly increasing its service life, and also provides intensive and uniform heating of stones in an open stove.

Sauna stove dimensions (one of the possible options is indicated):

- Height (including the flue pipe) - 600 mm. +200 mm.

- Depth (including combustion channel) - 675 mm. +200 mm.

- The depth of the firebox is 465 mm. +200 mm.

- Furnace tunnel length - 250 mm. +100 mm.

- Door width - 260 mm. +100 mm.

- Furnace weight - 105 kg. +40 kg.

Exhaust gases pass from the combustion chamber along the so-called "labyrinth" formed in the upper part of the combustion unit, thereby evenly distributing heat to all walls of the combustion unit. Initially, the exhaust gases move upward from the burning fuel, then, hitting the upper tooth of the baffle, move sideways to the free outlet, hit the upper wall of the upper furnace body and move upward into the flue pipe.

To increase the time for maintaining the set temperature and humidity in the steam room, the design of the sauna stove uses an external casing (open heater - a grid for stones made of carbon steel), in which stones are placed. The stones are placed all over the space between the outer casing of the furnace (mesh, closed casing, etc.) and the combustion unit itself so that natural gaps of 1-3 cm remain between the stones for natural air circulation and uniform heat removal from the walls of the furnace. Additionally, stones are placed on top of the combustion unit, covering the elements of the furnace body.

Claims (8)

1. Sauna stove containing a combustion unit, an ash pan, a ash pan and a grate, characterized in that the combustion unit consists of two parts made of cast iron - an upper half-casing with a chimney outlet and a lower half-shell, grooves are made on the abutting surfaces of the half-shells, in which the refractory is laid cord, and all the joints of the half-shells are treated with a heat-resistant sealant, at least two heat-dissipating ribs pass on the outer side of each half-shell, and the wall thickness of the combustion unit with a tolerance of ± 1 mm varies from 6 mm to 12 mm, being 10 mm at the side walls furnace unit, and in the place of the presence of ribs is 12 mm. 2. Sauna stove according to claim 1, characterized in that the ribs are made with equal distances from each other and from the front and rear edges of the combustion unit. 3. Sauna stove according to claim 1 or 2, characterized in that the number of ribs is preferably four. 4. Sauna stove according to any one of paragraphs. 1-3, characterized in that a bump tooth is installed in the design of the combustion unit. 5. Sauna stove according to claim 1, characterized in that the grate is removable and installed on the protrusions made in the lower half-body. 6. Sauna stove according to claim 1, characterized in that an ash pan is attached to the lower half-body under the grate. 7. Sauna stove according to any one of paragraphs. 1-6, characterized in that it is equipped with a combustion tunnel, and the abutting surfaces of the combustion unit with the combustion tunnel are made along the perimeter with pockets or grooves in which a refractory cord is laid, and also when docking, a refractory sealant and hardware connections are used. 8. Sauna stove according to any one of paragraphs. 1-7, characterized in that a stone grid is installed around the combustion unit.

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