RU230659U1 - FIREPLACE - Google Patents

Abstract

The utility model relates to the heating field, namely to fireplaces intended for heating residential premises. The fireplace includes a steel body, a door with glass, a firebox, a smoke pipe located in the upper part of the body, and a rear air duct with an upper inlet. In this case, the fireplace is provided with a middle pipe surrounding the smoke pipe, with a box-shaped adapter for joining with the inlet opening of the rear air duct and a coaxial pipe made in the form of coaxially located outer and inner pipes connected in the upper part using a steel flat ring, the middle pipe is detachably installed inside the body, the coaxial pipe is detachably connected by an inner pipe to the smoke pipe, and the fireplace is designed with the possibility of passing an air flow from the room through a gap between the fireplace body and the end of the outer pipe of the coaxial pipe, a labyrinth air duct formed between the walls of the outer and inner pipes of the coaxial pipe and the wall of the smoke pipe, through the middle pipe and the rear air duct into the firebox. The technical result consists in increasing the maintainability and service life of the fireplace with the possibility of its compact placement near walls made of combustible materials. 5 fig.

Description

The utility model relates to the field of heating, namely to fireplaces for burning solid fuel, intended for heating residential premises.

From the prior art, see the description of patent US 5603312 A, IPC F24B 1/181, F24B 7/02, published 18.02.1997, a design of a wood-burning fireplace with direct ventilation is known.

A fireplace known from the description of patent US 5603312 A includes a steel body, a door with glass, a firebox, a rear air duct located inside the body between the rear wall of the body and the firebox, a fan installed inside the rear air duct, and also a chimney assembly including an inner pipe, an intermediate pipe and an outer pipe.

Between the outer and intermediate pipes, a channel is formed for supplying air from outside into the combustion chamber, and between the inner and intermediate pipes, a channel is formed for removing hot air from the combustion chamber.

The fan installed in the rear air duct is switched on when the set temperature of the air surrounding the fireplace is exceeded.

The presence of a rear air duct cooling the rear wall of the body theoretically allows the fireplace to be installed more compactly and reduce the safe distance to the wall of the room made of flammable materials by approximately 4 times.

However, in the case of the fireplace known from the description of patent US 5603312 A, effective cooling of the rear wall is achieved only when the fan is running, so failure of the fan can lead to a fire.

The fireplace known from the description of patent US 5603312 A has the following disadvantages:

low maintainability;

limited service life;

increased complexity of the design;

increased labor intensity and inconvenience of installing a fireplace.

Low maintainability is due to the non-detachable connection of the body with the chimney unit.

The short service life is determined by the presence of a fan and electronic components operating at high temperatures.

The increased complexity of the design is explained by the presence of a chimney unit, a fan and a temperature measuring device.

The increased labor intensity and inconvenience of installing a fireplace are explained by the bulkiness of the design.

The closest analogue of the claimed utility model is a fireplace, see the description of patent SU 1602404 A3, IPC F24H 1/24, F24B 7/00, prior 22.02.1984, published 23.10.1990.

The fireplace, accepted as the closest analogue, includes a steel body, a door with glass, a firebox, a rear air duct with an upper inlet, a smoke pipe for removing combustion products from the firebox, located in the upper part of the body, and two pipes coaxially enclosing the smoke pipe and forming a labyrinth air duct, which is connected to the inlet of the rear air duct.

The air required for combustion is supplied from the room to the firebox through a labyrinth air duct connected to the rear air duct, and the combustion products are drawn out of the firebox through the chimney.

Unlike fireplaces with direct ventilation, air enters the combustion chamber directly from the heated room. In this case, the air, on the one hand, cools the chimney and steel parts of the fireplace body, primarily the rear wall of the body, and on the other hand, enters the combustion chamber heated, due to which the efficiency of combustion of solid fuel increases. The fireplace, known from the description of patent SU 1602404 A3, has the following disadvantages:

low maintainability;

limited service life;

increased labor intensity and inconvenience of installing a fireplace.

The service life is determined by the operation of the steel parts of the fireplace body and chimney under increased thermal load, reaching temperatures in places from 750 to 1000 degrees Celsius.

The low repairability of the fireplace is due to the permanent connection of the body (welding) with the chimney, with the pipes surrounding the chimney, with the rear air duct. Failure of any of the above design elements negatively affects the overall service life of the fireplace.

The increased labor intensity and inconvenience of installing a fireplace are explained by the bulkiness of the design.

The objective, which the utility model is aimed at achieving, is to create a fireplace, characterized by the possibility of compact placement near walls made of flammable materials, increased maintainability and increased service life.

The technical results that the utility model is aimed at achieving consist of increasing the maintainability and service life of the fireplace when compactly placed near walls made of flammable materials.

The above technical results are achieved in a fireplace that includes a steel body, a door with glass, a firebox, a smoke pipe located in the upper part of the body, and a rear air duct with an upper inlet.

The specified technical results are achieved in that the fireplace is additionally provided with a middle pipe surrounding the smoke pipe, with a box-shaped adapter for joining with the inlet opening of the rear air duct, and a coaxial pipe made in the form of coaxially located external and internal pipes connected at the top by means of a steel flat ring, wherein the middle pipe is detachably installed inside the body, the coaxial pipe is detachably connected by an internal pipe to the smoke pipe, and the fireplace is designed with the possibility of passing an air flow from the room through the gap between the fireplace body and the end of the external pipe of the coaxial pipe, a labyrinth air duct formed between the walls of the external and internal pipes of the coaxial pipe and the wall of the smoke pipe, through the middle pipe and the rear air duct into the firebox.

In this case, the rear air duct can be formed inside the fireplace body between the rear wall of the body and the rear wall of the firebox.

The utility model is illustrated by the following figures.

Fig. 1 shows a fireplace, general view.

Fig. 2 shows a section of the fireplace.

Fig. 3 shows a coaxial pipe.

Fig. 4 shows the middle branch pipe.

Fig. 5 shows a section of the fireplace; the arrows indicate the path of the air flow from the room to the firebox.

The following are designated by the positions in Fig. 1-4:

1 - fireplace; 2 - body; 3 - door; 4 - glass; 5 - firebox;

6 - smoke pipe; 7 - middle pipe; 8 - coaxial pipe;

9 - handle; 10 - inner tube of coaxial branch pipe;

11 - outer pipe of coaxial branch pipe; 12 - connector;

13 - cylindrical part of the middle branch pipe; 14 - box-shaped adapter;

15 - steel flat ring; 16 - silicon oxide insulator.

The utility model can be successfully implemented in a fireplace 1, including (see Fig. 1, 2) a steel body 2, a door 3 with heat-resistant glass 4 and a handle 9, a firebox 5, a smoke pipe 6 and a rear air duct.

To implement the utility model, the following changes are made to the design of fireplace 1.

The firebox 5 is lined with fire-resistant fireclay tiles, which can be easily replaced with new ones if necessary. The fireplace 1 is equipped with:

the middle pipe 7, surrounding the smoke pipe 6, with a box-shaped adapter 14, and

coaxial branch pipe 8, which includes coaxially located steel pipes 10, 11, connected at the top by a flat steel ring 15 welded to them, and a connector 12 with an insulator 16 made of silicon oxide.

In this case, the middle branch pipe is detachably installed inside the housing, the coaxial branch pipe is detachably connected to the smoke branch pipe, and the labyrinth air duct formed between the pipes 10, 11, the wall of the cylindrical part 13 of the middle branch pipe 7 and the wall of the smoke branch pipe 6 is connected through a box-shaped adapter 14 to the inlet opening of the rear air duct with the possibility of supplying air from the room to the combustion chamber.

The ability to dismantle the middle and coaxial pipes increases the repairability of the fireplace, since the mentioned pipes can easily be replaced with new ones if necessary.

The middle branch pipe 7 is shown in Fig. 4. It is made of steel and includes a cylindrical part 13 and a box-shaped adapter 14.

Box adapter 14 is designed for joining with the inlet of the rear air duct and supplying air to the rear air duct.

It seems rational to form a rear air duct inside the body 2 of the fireplace 1 between the rear wall of the body 2 of the fireplace 1 and the rear wall of the firebox 5, as shown in Fig. 2.

In the simplest case, the rear air duct inside the body is formed by installing a steel partition between the rear wall of the firebox and the rear wall of the fireplace body, spaced from the surface of the bottom of the fireplace body.

The coaxial pipe 8 is shown in Fig. 3. The coaxial pipe consists of coaxially located inner 10 and outer 11 steel pipes, connected at the top by a flat steel ring 15, as well as a connector 12 with an insulator 16 made of silicon oxide.

A steel flat ring 15 is welded to the walls of steel pipes 10, 11, connecting the said pipes 10, 11 together.

Connector 12 is designed to connect the fireplace to a fixed chimney.

The coaxial arrangement of pipes 10, 11, smoke pipe 6 and cylindrical part 13 of the middle pipe 7 allows for the simplest implementation of a labyrinth air duct, which in the proposed design performs several functions:

convective heat recovery from the smoke pipe and the rear wall of the fireplace body;

heating the air entering the combustion chamber for more efficient combustion of solid fuel.

When assembling the fireplace, the middle pipe 7 is installed in the body 2 of the fireplace 1 so that the air through the cylindrical part 13 and the box-shaped adapter 14 enters through the upper inlet into the rear air duct.

After connecting the middle pipe 7 to the body, the coaxial pipe 8 is installed. For this, the lower end of the inner pipe 10 is deepened inside the smoke pipe 6. After installing the coaxial pipe 8, a gap is formed between the body 2 of the fireplace 1 and the lower end of the outer pipe 11 of the coaxial pipe 8, which is intended for the flow of air from the room into the firebox 5.

In Fig. 5 the path of the air flow from the room to the combustion chamber is shown by arrows. The air passes successively through the gap between the body 2 of the fireplace 1 and the lower end of the outer pipe 11 of the coaxial pipe 8, then passes through the labyrinth air duct formed between the pipes 11, 10, the cylindrical wall of the smoke pipe 6 and the wall of the cylindrical part of the middle pipe 7, after which it enters the rear air duct through the box-shaped adapter 14 and finally reaches the combustion chamber 5.

When the fireplace is operating, the air coming from the room cools the smoke pipe 6 and the steel parts of the body 2 of the fireplace 1, primarily the rear wall of the body 2.

Fireplace 1 is installed in the room using brackets or a floor stand produced by the manufacturer.

After installing the fireplace, a steel heat-insulated chimney is connected to the coaxial pipe 8 through the hole in the connector 12.

Fireplace 1 is operated as follows.

Open door 3 using handle 9 and place solid fuel, such as a RUF briquette or a log, into combustion chamber 5.

They set fire to the fuel.

At the ignition stage, door 3 is not closed completely, ensuring the flow of air from the room into the combustion chamber 5.

After several minutes of stable fuel combustion, door 3 is closed. Air begins to flow into the combustion chamber along the route schematically shown by the arrows in Fig. 5, and combustion products from combustion chamber 5 are removed through smoke pipe 6.

The estimated service life of the fireplace is at least 10 years.

During operation, the fireplace parts, such as door 3, door seal, handle 9, fireclay tile of the firebox 5, middle pipe 7, coaxial pipe 8, can be replaced if necessary without dismantling the fireplace 1.

The conducted patent research confirms the global novelty of the utility model.

Operation of prototypes of the utility model confirmed its industrial applicability and compliance with the declared technical results.

Claims (1)

A fireplace comprising a steel body, a door with glass, a firebox, a smoke pipe located in the upper part of the body, and a rear air duct with an upper inlet opening, characterized in that the fireplace is additionally provided with a middle pipe surrounding the smoke pipe, with a box-shaped adapter for joining with the inlet opening of the rear air duct and a coaxial pipe made in the form of coaxially located outer and inner pipes connected at the top by means of a steel flat ring, wherein the middle pipe is detachably installed inside the body, the coaxial pipe is detachably connected by an inner pipe to the smoke pipe, and the fireplace is designed with the possibility of passing an air flow from the room through the gap between the fireplace body and the end of the outer pipe of the coaxial pipe, a labyrinth air duct formed between the walls of the outer and inner pipes of the coaxial pipe and the wall of the smoke pipe, through the middle pipe and the rear air duct into the firebox.