[0001] The subject of the invention is the side walls of the combustion chamber in a lamel
heat exchanger, most advantageous in applications in condensation gas furnaces as
a heat exchanger with a closed combustion chamber.
[0002] In this field of technology there are already some heat exchanging solutions with
combustion chambers combining the functions of a primary heat exchanger with that
of an economiser function.
[0003] Such an example is the construction of a heat exchanger and a combustion chamber
made by Randamax B.V, of a plate structure, in which two media flow in the exchanger
in parallel layers, divided by corrugated walls. In these exchangers the lamel plates
are distanced from each other by means of sealing spacers screwed to each other in
a stiff structure with a screw connection creating leaktight side walls for the combustion
chamber and the heat exchanger.
[0004] The disadvantage of such a known solution is the possibility of lamel plate deformation
as a result of over-tightening of the screws, which unfavourably influences the heat
exchange process. Moreover, the screw connections do not guarantee the required connection
leaktightness, which at the same time causes the risk of uncontrolled self-unscrewing.
[0005] The essence of the invention is the development of the side walls of a combustion
chamber in a lamel heat exchanger to eliminate the above disadvantages.
[0006] The task was achieved using a solution where the external edges of the lamel plates
where formed into an angle, joined inseparably by overlapping and hence creating a
leaktight external surface of the side walls of the combustion chamber. Inside the
side walls of the combustion chamber are flow channels for the heated medium.
[0007] In the solution, according to the invention, the structure of the side walls of the
combustion chamber in a lamel heat exchanger eliminates the necessity to build an
additional shield for the combustion chamber and the flow channels to eliminate the
necessity to install additional thermal insulation, and which ensures achieving very
good operational parameters and a high heating efficiency.
[0008] The subject of the invention is shown as an example in the attached picture, where
figure 1 presents the axonometric view of the heat exchanger as well as the side walls,
while figure 2 presents a part of the longitudinal intersection of the inseparable
and overlapping connection of the external edges of lamel plates.
[0009] The lamel heat exchanger including the side walls, as in the invention, is built
of lamel plates
1 creating the exchanger packet after connecting. The internal edges of lamel plates
1 define the space of the combustion chamber exchanger
2,of which the side walls in the internal space have the formed flow channels
3 shaped from inseparably joined necks
4 of openings made in the lamel plates
1, creating spaces
5 between the individual lamel plates
1.
1. The side walls of the combustion chamber in a lamel heat exchanger formed from lamel
plates creating a heat exchanger packet, being an integrated heat exchanging surface,
is significant in the fact that the external edges of the lamel plates (1) shaped into an angle, are joined inseparably by overlapping, and hence creating a
leaktight external surface for the side walls of the combustion chamber (2) and inside the side walls of the combustion chamber (2) there are flow channels (3) for the heated medium.
