FI61345B - VAERMEVAEXLARE - Google Patents

Description

«Ϋ́35 ^ Π ΓλΙ mix ADVERTISEMENT

JHjft ^ * * utlAggnINGSSKRIFT 61 3 4 5 C Patent rayoniirtty 12 07 1932 uQrfy Patent raeddelat (51) Kv.lk.3 / lnt.Cl.3 F 23 J 13/00 FINLAND — FINLAND (21) P «* ottlh» kemu * - Patwitamekning 790926 (22) H * k * ml * pilvl - AMMuilnpdtg 19.03.79 ^ * (23) AlkupUYt —Glltl | h «udaf 19.03.79 (41) Tullut JulklMksI - Bllvlt offmtllg 20.09.80

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Patent- och registerstyrelten '' Antökan utlagd och utl. »Krift * n publicartd 31.03.82 (32) (33) (31) Pyydetty atuolkau» —Bajird prlodtet (71) Erkki Vesterinen, Lielahdenkatu 33 F 39, 33 ^ 10 Tampere 1 * 1, Finland-Finland (FI) (72) Leo Vesterinen, Tampere, Finland-Finland (Fl) (71+) Ins.tsto. Olli Heikinheimo Ky (5 * 0 Heat exchanger - Värmeväxlare

The invention relates to a heat exchanger, in particular a so-called central heating boiler. a convection part surrounded on the outside by a water space and heated on the inside by flue gases and provided at least on the inside with lamellae fixed to the heat transfer surface.

Central heating boilers are already known in which the convection section is provided with horizontal fixed lamellae. In practice, however, there are several disadvantages associated with such boilers. Heat transfer is often quite uneven and as a result, certain lamellae may overheat and burn. The heat transfer surface may also remain relatively limited despite the lamellae. The gas flow resistance of such a boiler is usually quite high and cannot be adjusted. In addition, it can be said that cleaning the type of boiler described is very difficult.

A type of boiler is also known in which vertical lamellae are arranged in the convection section. The disadvantage of this type of boiler is the insufficient heat transfer capacity. As a result, the flue gas discharge temperature has generally remained unacceptably high and the boiler efficiency thus low. It can also be stated that all boilers with vertical lamellae available on the market 2,61345 are so-called top-cleanable model. As a result, sufficient space must be reserved above the boiler for the cleaning operation as well. In practice, it is necessary to reserve an empty space the height of the boiler for this purpose.

In order to avoid the above drawbacks, the device according to the invention is characterized by what is stated in the characterizing part of claim 1.

The most important advantages of the invention are e.g. following. The boiler is very small, but the heat transfer capacity is still good. This has been found by comparing the measured flue gas exhaust temperatures with the known boiler exhaust temperatures. The boiler according to the invention does not become as dirty as most known boilers. Cleaning the boiler is very easy and can be done efficiently from the side of the boiler. In this case, no free space above the boiler is required for cleaning. A very significant advantage is that the flow resistance of the boiler is adjustable over a wide range. This allows the use of different types of fuels.

In the following, the invention and other advantages obtained by it will be explained in detail with reference to the accompanying drawings.

Figure 1 shows a preferred embodiment of the invention in side section

Figure 2 shows a section II-II of Figure 1.

According to Figure 1, the central heating boiler according to the invention comprises a furnace 1. The furnace 1 is filled from above via a lid 2. A grate 3 is placed at the bottom of the furnace. From the furnace, the flue gases pass through the flue 4 to the convection section 5. The convection section 5 and the furnace 1 are surrounded by a water space 6. In the lower part of the convection section 5, through part 5 and transfer part of their thermal energy through the walls of the convection part 5, i.e. the heat transfer surfaces, to the surrounding water space 6.

In order to increase the surface area of the heat transfer surfaces and at the same time make the heat transfer more efficient, vertical lamellae 8 have been attached to the heat transfer surfaces. heat transfer surface area. Even more important, however, is the technical advantage that by placing the horizontal lamellae 9 in different sections, the tensile strength of the flue can be effectively adjusted. Adjustability is of great importance, for example, when converting a boiler from a solid fuel burner to an oil boiler or vice versa. Similarly, for example, replacing an old model low-pressure oil burner with a new type of high-pressure bulb most often requires adjusting the traction resistance. With the present invention, this is easily accomplished.

According to a preferred embodiment of the invention, a brick or masonry 10 is arranged below the lamellae 8. This makes it possible to intensify the combustion process, since the brick is in a continuously glowing state when the oil burner is burning. The brick is also used to create a suitable pre-constriction in the flue. Horizontal lamellae 9 are arranged in the sections of the vertical lamellae 8 above the brick 10. The horizontal lamellae 9 are preferably dimensioned so that a small gap is left between each lamella 9 and the heat transfer surface. This, of course, somewhat impairs the heat transfer, but this has the advantage that no ash can accumulate at the angle of the horizontal lamellae and the heat transfer surface. As the boiler stays better clean, the efficiency of the boiler increases. In the same way, the brick 10 is also detached from the heat transfer surfaces.

The final tension adjustment takes place with a wider horizontal lamella 11 placed at the top of the vertical lamellae 8. This is so large in width that it extends from one edge over the center line of the convection section. Instead, the horizontal lamellae 9 are generally narrower, although in certain embodiments lamellas extending more than halfway may also be used.

It is preferred that the vertical lamellae attached to the opposite heat transfer surfaces 21 and 22 do not extend interleaved but leave a narrow gap between them. This makes it easy to clean the boiler with a T-shaped brush. When cleaning the boiler, first remove all horizontal lamellas 9. This can be done from outside the boiler without dismantling the boiler. Each gap between the vertical lamellae is then brushed separately in an up-and-down motion. The arm of the brush is then suitable for movement in the gap 23 between the vertical lamellae 8.

61345

Other advantages of the boiler according to the invention include the fact that the contamination of the boiler is relatively small. This is due to the high surface temperature of the convection section of the boiler.

The invention has been described above mainly with reference to only one preferred embodiment. However, the disclosure is not intended to limit the invention in any way to the example provided. On the contrary, many modifications in the embodiments of the invention are possible within the scope of the following claims.

Claims (5)

5,61345 1. Heat exchanger, especially in a central heating boiler so-called. a convection part (5) surrounded on the outside by a water space (6) and heated on the inside by flue gases and provided at least on the inside with lamellae fixed to the heat transfer surface, characterized in that lamellae (8) are mounted vertically or approximately vertically is cut by one or more cuts, and at least some of said cuts are provided with removable lamellae (9, 11). Heat exchanger according to Claim 1, characterized in that the sections which cut the vertical lamellae (8) are approximately horizontal. Heat exchanger according to Claim 1 or 2, characterized in that the vertical lamellae (8) fastened to the opposite walls (21, 22) do not extend into each other's rest. Heat exchanger according to one of the preceding claims, characterized in that the uppermost horizontal lamella (11) extends horizontally from the second heat transfer surface (21, 22) over the center line of the convection section. Heat exchanger according to one of the preceding claims, characterized in that the horizontal lamellae (9) do not extend as far as the heat transfer surfaces (21, 22).