FI63628C - ANORDINATION FOR UPDATING AV EN BYGGNAD - Google Patents

Description

63628

The present invention relates to an apparatus for heating a building with wood, oil or similar fuel, comprising a heating furnace 5 generating circulating air for heating rooms and a water accumulator connected to it by a flue connection.

10 It has previously been known to use a water accumulator connected to a heating furnace, the water of which is heated by passing a water pipe from the accumulator to the furnace furnace and back. However, the efficiency of such a heater is relatively low. DE 314 344 and FR 1 117 353 also disclose heating devices in which the flue gas flue passes through a water accumulator.

The object of the present invention is to improve the efficiency of the heating system by recovering the thermal energy contained in the flue gases as accurately as possible. The device according to the invention is characterized in that below the water accumulator there is a flue gas space separated from the water accumulator by the wall, which joins the flue passing through the water accumulator and the flue connection of the furnace. When the heating device according to the invention is used, the flue gases 25 transfer most of their energy through the wall between the water tank and the flue gas space to the water in the water tank. The wall surface through which heat is transferred from the flue gases is then larger than in previously known devices, in which heat is transferred only through the wall 30 of the flue. The efficiency of the heater is therefore very good.

In the experiments performed, the efficiency of the boiler according to the invention has been measured to be 77.5% when heated with wood and 86.3% when heated with oil. 35 size, that the efficiency of a conventional wood-fired boiler 2,63628 is usually only slightly above 60%. When burning wood, energy can also be saved by closing the smoke damper after burning and not keeping it open, as is mandatory in continuous-fired boilers.

5 The method is suitable for heating a single-family home using recirculated air. The heating stove can be equipped with a stove section, in which case the stove is placed in the sauna of the house. A water tank connected to a heating furnace can be fitted either in a sauna or in another room and transfers heat to the surrounding space, from where the heated air is led to different rooms in the house by means of natural circulation through openings in the walls between rooms. The multi-power heater does not require a separate boiler room or radiators in the rooms.

The oven and the associated water tank are not pressure-15 vessels, so there is no risk of explosion. If necessary, additional humidification can be obtained in the recirculated air by keeping the water tank lid open.

The invention will be described in more detail below with reference to the accompanying drawings, in which Fig. 1 shows a device according to the invention seen from the side and Fig. 2 shows the same device seen from above, a section of the oven in section A-A.

The heating furnace 1 has a grate 2, a mouth and combustion air weathering hood 3 and an ash removal and draft control hatch 4. At the top of the furnace there is a stove part where the stove stones are replaced by a uniform stove lid 5 cast from special minerals. harmful positive ions are emitted. 30 Above the stove lid is a stove lid cover 7 with a hinged steam hatch 6.

The flue connection 8 is arranged at the bottom of the oven. A vertical flue gas baffle 10 is arranged between the fire housing and the flue connection, which prevents the flue gases from escaping. 35 directly from the bottom of the firebox to the chimney. The control plate first directs the flue gases to the top of the furnace, under the stove lid and 3 63628 from there further through a vertical duct 15 on the side of the furnace and to the flue connection 8.

The flue connection 8 of the furnace is connected to the flue connection 8 'at the bottom of the water tank 11. This leads to a space 12 separated from the water accumulator by a horizontal wall 16 below the water accumulator, which joins a chimney 13 running vertically through the center of the accumulator · At the upper end of the flue, above the accumulator, there is a flue damper 14. with removable cover 30 with opening door 31 ·

The water wall of the water tank has the following connections: filling water pipe connection 18, connections 19 and 20 for hot water coil ends, overflow pipe connection 21, condensate-15 water pipe outlet connection 22 and return connection 23, charges 24, 25 and 26 for thermostat sensors, charge 27 drain valve connection 29 ·

The water heater heats the hot water by means of a hot water coil inside the accumulator connected to the connections 19 and 20, which is connected to the water supply network. The accumulator can also be equipped with an electrical resistor connected to point 28, which can be used to heat domestic hot water in summer and which can also be used to heat the house in winter in the absence of residents. A suitable water tank volume is, for example, 43Ο 1.

Furnace 1 can be, for example, either wood or oil heated. However, at current oil prices, wood is a cheaper fuel. A wood-burning stove can be used by performing 30 winters during the colder period, eg twice a day. With warmer air, even fewer heating sessions will suffice. During the heating intervals, the smoke damper 14 is kept closed. During heating, the flue gases transfer their thermal energy by convection through the partition wall 16 and the wall of the flue 13 into the water in the water accumulator 35, from which the heat is gradually transferred to the room air through the outer walls of the accumulator. Vesivaraa-