FI89979C - central unit - Google Patents

Description

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CENTRAL HEATING UNIT - CENTRAL VÄRMEENHET

The invention relates to a central heating unit according to the preamble of claim 1.

The solid fuel central heating units currently in use for detached houses include separate 10 boilers and a heat storage. Installations like this need a separate boiler room, which raises construction costs.

A central heating unit is known from Finnish publication 53881, which comprises a storage space for the heating device, an expansion space and the necessary piping, the storage space and the expansion space being arranged in one tank, inside which the heating device is arranged so that it is at least partially surrounded by water. This solution is intended to operate only as a heating boiler, so the apartment must still have a separate open fireplace or oven.

In addition, the known solutions have a separate space from the central heating unit for the circulating water pump and the necessary valves, which increases the construction costs and makes it difficult to place the pipes.

The object of the present invention is to provide a new type of central heating unit which avoids the side effects of the prior art and expands the possibilities of use.

The invention is characterized by what is stated in the characterizing part of claim 1. Particular embodiments of the central heating unit according to the invention are in turn characterized by the solutions according to claims 2-3.

2 «9979

Numerous advantages are achieved by the invention. The central heating unit according to the invention can be placed as a whole in a living room. This saves construction costs as a separate boiler room is no longer needed. As a result of the almost complete combustion achieved by the unit according to the Kek-5 invention, there are no longer any odor nuisances. Because the central heating unit is placed inside a uniform insulation, the amount of waste heat is very small. Also in open fireplace operation, the heat generated is transferred to the water in the storage space. Placing the pump and piping space inside the thermal insulation of the central heating unit reduces waste heat and facilitates the placement of pipes. The invention provides a central heating unit which, when coated with a suitable material, for example ceramic tiles, is also pleasant in appearance.

The invention will now be described with reference to the accompanying drawings, in which Figure 1 shows a front section of a central heating unit according to the invention.

Figure 2 shows a side section of a central heating unit according to the invention in open fireplace operation.

25

Figure 3 shows a side section of a central heating unit according to the invention in boiler operation.

Figure 4 shows another central heating unit 30 according to the invention

In the exemplary case according to the drawings, the heat source of the heating unit is a furnace 1. An afterburner space 2 is arranged above the furnace, which also acts as a baking oven. 35 The firebox and the afterburner are connected to each other by means of an opening 19. Below the firebox there is an ash space 7. Between the firebox and the ash space there is a grate 8. In the example Γ \ '* 7 Λ 3' by y / 1, the charge space 9 and the expansion space 10 are combined into one tank inside which the furnace 1, the afterburner space 2 and the ash space The heating device forming 7 is arranged so that it is at least partially surrounded by water. The entire central heating unit 5 is surrounded by thermally insulated walls 26. Inside the thermally insulated walls, a pump and piping space 11 is arranged, in which at least a circulating water pump 12 and the necessary valves for connecting the central heating unit to the water supply and heating circuit are arranged.

10

Furnace 1 can be used in two different functions. The firebox acts as an open fireplace (Figure 2) when the firebox door 24 is removed or is open. In this operation, the flue gas discharge is controlled by means of a control member 22 to pass through a duct 23 15 a shorter route to the flue. The arrows in the figure illustrate the flow of flue gases from the firebox to the flue. In the open fireplace function, the amount of fire air is not limited.

The afterburner 2 can be used as a baking oven in the solution 20 according to the invention. The afterburner 2 remains warm for a long time, due to the materials of the furnace and the afterburner.

When using the firebox in boiler mode (Fig. 3), door 24 is closed. In this case, the air required for combustion is led to the furnace 1, through one or more air intakes 4, from the chamber 3, where it has been heated. The after-air is also preheated. The afterburner air is led to the upper part of the furnace from the chamber 5 through one or more openings 6. Chambers 3 and 5 are supplied with air from outside the central heating unit. Flue gases are led through duct 21 to the flue. In this case, the control member 22 directs the flue gases a longer route to the flue. The flow of flue gases from the furnace to the flue is illustrated by the arrows drawn in the figure.

In the boiler mode, the heat contained in the flue gases is recovered more efficiently than in the open fireplace mode, as the longer flue gas path allows larger heat transfer surfaces with the storage space 9.

4 8 C; 9 79

The firebox 1 and the afterburner 2 are preferably made of brick, ceramic pulp or the like. With this advantageous choice of material as well as the preheating of the combustion air 5, the combustion temperature can be raised to a sufficiently high level that the combustion is almost complete. In this case, the boiler does not accelerate and odor nuisance is not caused.

In the example, the pump and piping space 11 is located under the boiler-10. The entire central heating unit thus forms a compact structure that can be placed in the living space. The central heating unit can be coated with a suitable material, for example ceramic tiles, so that its appearance is of a very high quality.

15

A preferred application example of the central heating unit is shown in Fig. 4, in which the furnace supply opening 24 and the afterburner (baking oven) 2 opening are arranged on opposite sides. The structure according to the figure can be arranged 20 so that the door of the afterburner 2 opens into the kitchen and the door of the firebox into, for example, a fireplace room.

A pipe coil 18 is arranged in the charging space 9 for heating hot water. The water lines 28, 30 are connected to the coil 25 in a manner known per se. An electric heater 17 is also arranged in the charging space 9, which can be used to heat the water in the charging space.

Figure 1 further shows other pipes necessary for the central heating unit 30 and the charging tank filling equipment, for which a separate patent application has been filed.

It will be clear to a person skilled in the art that the invention is not limited to the exemplary embodiments presented above, but can be varied within the scope of the appended claims.

Claims (3)

5 39979 A central heating unit comprising a solid fuel firebox (1) in which fuel is combusted, ducts leading from the firebox to the flue, a storage space (9) surrounded by thermally insulated walls (26) and in connection with which the firebox (1) is arranged so that it is at least partially surrounded by water, as well as the necessary piping, characterized in that the furnace (1) acts as a heating boiler and an open fireplace, a pump and piping space (11), preferably containing at least a circulating water pump (12) and the necessary for connection to the central heating circuit and the domestic hot water supply, is arranged inside the thermally insulated walls (26), and that an afterburner space (2) is arranged between the firebox (1) and the chimney. Central heating unit according to Claim 1, characterized in that the afterburner (2) also functions as a baking oven. Central heating unit according to Claim 1 or 2, characterized in that the firebox (1) and the afterburner (2) are made of brick, ceramic pulp or the like. 6 S-J979