SK270992A3 - Instalation of central heating - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a central heating installation having a domestic hot water or domestic hot water circuit and having a heating device with a jacket or ring, the bottom of which is provided with a burner, in particular a gas burner and rotatable or otherwise a pipe in which water from the heating circuit is circulated, the circuit passing through a plurality of fins arranged at the top of the shell into a hot gas path that escapes and is then directed to the drain pipe.

European patent no. 89400269 (Priority French Patent No. 88.01800 -) describes the installation of a central heating with a mixed heat exchanger. In particular, it comprises a plurality of domestic water heating pipes which are arranged within the flattened pipes in the form of hairpins or snakes. These tubes form a block connected by knees and a set of ribs and imagine! the heating water circuit, which also heats the service water.

This arrangement ensures that hot service water pipes adapted to the shape of hairpins or snakes in the flattened heating water pipes are not in contact with these pipes.

The dimensions of these flattened tubes and the dimensions of the hot water circulating tubes are chosen so that the volume of water contained between the flattened tubes and the meanders of the hairpin tubes is as small as possible.

This embodiment requires that each end edge be provided with a welded or soldering extension so that the heating circuit, like the elbows used to connect the respective circuits to each other, is closed.

However, this arrangement has some serious drawbacks because it is both difficult and inefficient to perform tight

- 2 welds or brazed seams and secondly any filler metal always exhibits less mechanical and chemical resistance than the honey from which the tubes are made. For this reason, the service life of these mixed heat exchangers is reduced if the scale is removed regularly.

It is an object of the invention to improve the installation in such a way that the above-mentioned drawbacks do not.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a central heating installation equipped with a domestic hot water or domestic hot water circuit, having a heating device with a jacket having a lower part equipped with a burner, in particular a gas burner and wound or otherwise arranged. is formed by a plurality of fins provided at the top of the jacket in a hot gas path, the heating circuit passing through the fin set formed by a series of flattened tubes connected to one another by the elbows and a domestic hot water circuit formed by a series of tubes the service water pipes are arranged inside the flattened heating circuit pipes, marked as follows:

- the service water circulation pipes are hairpin shaped and this shape is achieved by bending the pipe 90 ° to the vertical and then another 90 ° to the previous plane and so on,

- the manufacture of said hairpin-like circulation is carried out by successive bending to two perpendicular planes without weld,

- the connection at one end of the whole of the service water treated in the form of hairpins to the flattened heating circuit pipes is carried out by a collector which is mounted on these pipes; this collector is then closed by a krytern.

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings, which illustrate embodiments thereof, without however limiting these embodiments of the invention in any way.

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Figure 1 is an overall perspective view of the device and shows in cross section various parts of the mixed heat exchanger A.

Figure 2 is a perspective view of tubes arranged in a row of hairpins in two perpendicular planes.

Figure 3 is a plan view of the assembly of the mixed exchanger A.

Figure 4 is a side view of the mixed heat exchanger A.

Figure 5 is a top view of the mixed exchanger A when assembled.

According to a particular embodiment of this mixed exchanger, hairpin-shaped tubes are arranged inside the block of flattened tubes for circulating hot service water. The mixed exchanger shall be organized as follows:

- the dimensions of said flattened pipes and said plumbing pipes are selected such that the volume of water contained in the annular space between the body and the hairpin pipe is reduced as much as possible;

- the exchanger block consists of a plurality of plates arranged on top of each other and brazed to flattened heating pipes. These tubes are connected at one of the ends of the knee by bending the tubes into a hairpin-like shape without a weld.

In the figures, in particular in FIG. 1, 2, 3 and 4, it can be seen that the heating device of the present invention comprises a first pipe 2 for central heating water and a second pipe 1 for domestic hot water.

Figure 1 shows the circulating water in the form of twilight hairpins 1 which are inserted into flattened heating circulation pipes 2 which are also arranged in the shape of hairpins.

In the upper part of the heating device where the object of the invention is located, the pipe 2 of the heating circuit has the shape. a plurality of flattened hairpins, as in pipes 2, each having a cross-section of oval shape, the longer axis being horizontal. These tubes are joined at one end of the knee, which is formed by bending these tubes.

The service water pipe 1 consists of pipes, preferably having a circular cross-section, arranged inside the flattened heating circuit pipes 2 in the form of a series of hairpins, which are formed by bending these pipes perpendicular to the plane twice in succession. The surface area of the heat exchange between the two circuits of the mixed heat exchanger is increased in this way, since all the bends are incorporated into the heating circuit and are not located outside this circuit.

The positioning of the service water pipes arranged in the hairpins inside the flattened heating circuit pipes is carried out in such a way that there is no physical contact between the walls of the pipes 1 and 2 and that the volume of water contained in the remaining circular space is as small as possible. A further result of this arrangement is that all the energy transmitted by the heating circuit is applied to the domestic water circuit. The assembly of the components takes place as follows: hairpin-shaped pipes 7 for domestic water circulation equipped with a plastic ring 6 are inserted into the flattened pipes 2 of the heating water circuit, while the fins X and the collector 4 are arranged above the flattened pipes 2 and the housing 5 completely the whole device. This collector provides a flow of heating fluid as well as the leakproofness of the entire plant.

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The collector 4 secures both circuits of the heat exchanger. The collector is connected to the heating water circuit by soldering. The two partition walls 7 cause the heating water to circulate in all flattened pipes. This collector is closed by a cover J5, which guarantees tightness.

In the alternative embodiment shown in FIG. 3, the rings made of a heat and moisture resistant plastic material, preferably silicone, can be inserted onto the tube set

- 5 domestic water circulation; these rings are pushed onto the pipe 1 at regular intervals. This special measure has a twofold advantage; firstly, it ensures that there is no contact of the pipes with the flattened heating circuit pipes 2 and, on the other hand, it eliminates the vibrations of the hydraulic system that occur in this type of installation when the service water circulates throughout the hairpin system.

According to this description, it is possible according to the invention to provide a heating system with perfect heat exchange between the two built-in circulation circuits of heating and service water due to the considerable surface area of heat exchange, which is achieved by hairpin formation of different circuits.

The absence of knees in both circuits, the change of direction achieved by bending the tubes of the various circulations simplifies the production of the heat exchanger, no brazing or welding is required and the risk of leaks is eliminated.

It is understood that the invention is not limited to the embodiments described and illustrated, but that it encompasses all variations.

Claims (6)

Patent claims l.A central heating installation equipped with a domestic hot water or domestic hot water circuit, consisting of a heating device with a jacket, the bottom of which is equipped with a burner, in particular a gas burner, around which a heating circuit pipe is rotatable or otherwise arranged; it passes through a set of fins arranged on the upper part of the casing in a hot gas path, wherein the heating circuit passing through the set of fins is formed by a series of flattened pipes connected to each other by bends and the hot water circuit is formed by a series of pipes (1) service water pipes are arranged inside the flattened pipes (2) of the heating circuit, characterized in that: - the service water circulation pipes are hairpin shaped and this snake is formed by bending the pipes 90 ° to the vertical and then another 90 ° to the previous plane, and so on, - said hairpin-like circulation is made by successive bending to two perpendicular planes without weld, - the connection to one end of the whole consisting of the circulation of service water treated in the form of hairpins and flattened pipes (2) of the heating water circuit is carried out by a collector (4) mounted on these pipes (2), the collector being closed by a cover (5). Heating installation according to claim 1, characterized in that the collector (4) is equipped with partition walls (7) which cause a circulation circulation in a series of flattened pipes. Heating installation according to either of Claims 1 and 2, characterized in that the service water circulation pipes (1) arranged as a series of hairpins in the flattened heating water circulation pipes (2) are not in contact with them. Heating installation according to one of Claims 1 to 3, characterized in that the dimensions of the flattened pipes (2) and of the domestic water circulation pipes (1) are selected such that the volume of water contained in the annular space between the flattened pipes and the hairpin pipes is reduced. most. Heating installation according to one of Claims 1 to 4, characterized in that the flattened hairpipes (2) of the water heating circuit are connected by elbows formed by bending the pipes to two perpendicular planes. Heating installation according to one of the preceding claims, characterized in that the hairpin-shaped circulation pipes (1) arranged in the flattened heating water-circulation pipes (2) are provided with a plurality of rings (6) of heat and moisture resistant plastic material such as silicon, the rings being threaded at regular intervals.