UA44366C2 - HEATING UNIT FOR A HEATING BOILER OPERATING ON LIQUID FUEL OR GAS, AND A MODULE FOR IMPLEMENTING SUCH A HEATING UNIT (VAR) - Google Patents

Abstract

The invention concerns a heating unit for oil or gas boiler, wherein said heating unit (3) comprises a case (5) lined internally, in a rear zone, with a shell (6), ring-shaped transverse fins (35) are provided between the shell (6) and the case (5) for denning transverse annular channels (36) wherein the fuel gases follow in parallel a transverse path before emerging from the heating unit (3), thereby improving heat exchange between the fuel gases and the water (22) they are meant to heat.

Description

This invention relates to the field of technology, which is water heating boilers, which use a burner operating on liquid or gaseous fuel and designed to heat water moving, as a rule, in a closed circuit. This circuit contains inside the water boiler a water circulation chamber (chamber 21, 121 in the claimed invention), covering the heating unit (3, 103), which in turn contains a burner for liquid or gaseous fuel (10). Outside the water boiler, this circuit may contain an internal coil in the household water storage, designed to ensure the heating of this household water, or a system of radiators with hot water circulation, connected to each other by means of pipelines and intended for space heating .

The present invention offers a special design of a heating unit and modules designed to implement such a heating unit.

The closest analogue of the claimed invention, i.e. its prototype, is a water heating boiler distributed on the market by the German company VEOTUE, in the version of implementation according to which the heat exchange fins and guide channels for gaseous fuel combustion products are oriented in the longitudinal direction between the means of ensuring the supply of these gaseous combustion products of fuel, located in the transition area between the front and rear zones of the casing, and the means of ensuring their exit, formed by a transverse annular outlet collector located around the rear end of this casing and opening upwards into a longitudinal smoke box installed above the casing and connected to smoke removal system.

This water heating boiler of the known type has advantageous characteristics in the sense that it is possible to determine its dimensional parameters in such a way that the front end of the flame torch affects the front transverse wall of the casing and causes the water to be heated at this level by means of direct heat exchange, and also in therefore understanding that the system formed by the shell and heat exchange fins ensures the orientation of the flow of gaseous fuel combustion products in the backward direction, along the longitudinal wall of the casing, and ensures heat exchange between gaseous fuel combustion products and water at this level.

Thus, this well-known water-heating boiler allows you to use quite effectively a significant part of the thermal energy produced as a result of fuel combustion to heat water, which, circulating in a circuit external to this boiler, can be used both for heating and for various sanitary needs.

To be more specific, we are talking about a water heating boiler of the type "EOKOVIOS EV 01/Za5-5regiaiIpeii2Kevvei 17-180KM/", which is distributed on the market by a German company

ASVYiZT VEOTE Str. 8. So

Meike yishg Neigipodoviesppik

Rosibasi 13 54, O-2902 Vavziede 1

Tei. (04402)80-0 - TeIeh 251910 - TeIetah (04402)80533

This water heating boiler is described in a brochure that was published in 1989.

The common features of this invention with the closest analogue are that, according to the prototype, the heating unit for a water-heating boiler operating on liquid fuel or gas contains: a casing having a longitudinal axis, capable of interacting with a nozzle or burner, which emits a flame torch along this axis. i of a certain direction, and holding a rear open transverse end used to accommodate a nozzle or a burner, a front transverse end closed by a transverse wall, and a peripheral part closed by a longitudinal wall having at least approximately a cylindrical shape of rotation about the axis, thus to form a blind longitudinal combustion chamber in the front area of this casing; means designed to limit the water circulation chamber in direct contact with the transverse and longitudinal walls outside in relation to the casing; a longitudinal sleeve having, at least approximately, a cylindrical shape of the surface of rotation relative to the axis and located inside the rear zone of the casing in such a way as to limit the combustion chamber in this zone and define there, together with the longitudinal wall, an annular chamber for the passage of gaseous fuel combustion products; input devices designed to ensure the supply of gaseous products of fuel combustion into the chamber as they pass from the combustion chamber; output devices designed to ensure the removal of gaseous products of fuel combustion beyond the passage chamber in the direction of the system for their removal; ribs located in the passage chamber in such a way as to form in it, together with the longitudinal wall and the wall, guiding channels for gaseous products of fuel combustion from the input means in the direction of the output means, and these ribs are in thermal conductivity relations, at least with the longitudinal wall .

Referring more specifically to the drawings described in the brochure, it can be seen that in the mentioned prototype, the ribs are located along the middle geometric planes that include the longitudinal axis of the casing and limit, together with the longitudinal wall and with the cover, channels that are oriented parallel to the mentioned axis.

As a result, the hot gaseous products of combustion coming from the burner or nozzle initially move in the direction along the longitudinal axis of the casing, towards the transverse wall before being deflected by this wall in the direction of the channels, and then move in these channels in the direction, in the opposite direction, along a rectilinear trajectory parallel to the longitudinal axis of the casing, and at a distance equal to the length of the channels and parallel to that axis, before undergoing a new deflection in the direction of removal.

In other words, passing through the indicated channels, which determine the direction of the flow, the gaseous products of combustion enter into heat exchange relations with the water to be heated, with the help of a longitudinal wall, only at a distance equal to the size of these channels in the direction parallel to the mentioned axis, which limits the possibility of heat exchange with the water to be heated and adversely affects the efficiency of this water boiler.

In addition, in the prototype, the location of the ribs along the planes diverging from the longitudinal axis has the consequence that the channels, which these ribs limit together with the longitudinal wall and the wall, narrow in the direction of the indicated axis, which makes it particularly difficult to perform the ribs by methods foundry production in the form of a single part with a longitudinal wall on which these ribs are placed, that is, it requires connecting the ribs to this wall by means of welding, which is quite expensive in terms of the number of operations performed and the cost of working time.

In comparison with the mentioned prototype of the fin of the heating unit according to the proposed invention, and therefore the channels are annular and transverse to the axis and served, at their entrance and at their exit, by a longitudinal collector.

It follows from the above that, according to the claimed invention, inside each of the channels, the hot gases reflected by the front wall move along a trajectory that is no longer straight and longitudinal, but circular and transverse, and the size of this trajectory is equal to the product of the number l of the diameter of the channel , which is considered, that is, more than three times the value of this diameter. The movement of gases along this trajectory in each of the channels is carried out in a state of heat exchange relations with the water to be heated with the help of a longitudinal wall. From the above, it follows that with identical overall dimensions of the heating block, the arrangement of the mentioned ribs and channels in accordance with the claimed invention allows you to significantly increase the length of the trajectory that the gaseous products of combustion pass in contact with the longitudinal wall and ribs, that is, to increase the possibility of heat exchange between these gaseous products of combustion and water in contact with this longitudinal wall compared to the mentioned prototype.

So, the proposed invention makes it possible to usefully use a larger amount of thermal energy produced as a result of fuel combustion in the form of heating water to be heated, that is, it makes it possible to increase the efficiency of this water heating boiler. If it is not necessary to increase the heat exchange capacity of the water boiler containing the heating unit according to the proposed invention, compared to the prototype, then the present invention also allows to reduce the dimensions of the heating unit compared to the dimensions of the heating unit of the prototype, in particular, in the longitudinal direction, since it is possible to place the same length of the trajectory of the movement of gaseous combustion products in an annular form with a smaller longitudinal size of the zone of the heating unit containing the ribs that define this trajectory, and while maintaining the same transverse size.

To this advantage, emphasized in the application itself, the advantage is added, which consists in the possibility of performing the ribs 35, 135 by methods of foundry production in the form of a single part with the longitudinal wall 14, 128 in the case of using the proposed invention, since the annular arrangement of the ribs 35, 135 in in this case, it does not lead to the narrowing of the channels 36, 136 in the direction of axis 4. Such an implementation by casting production methods is much more economical than the implementation of a welded structure, which is essentially the only realistically possible manufacturing option in the case of using a prototype.

The proposed invention relates to a heating unit intended for a water-heating boiler operating on liquid fuel or on gas and which contains: a casing having a longitudinal axis capable of interacting with a nozzle or burner, which forms a flame torch of a certain direction along this axis , and comprising a rear transverse open end into which the nozzle or burner is inserted, a front transverse end closed by a transverse wall, and a peripheral part closed by a longitudinal wall having, at least approximately, a cylindrical shape in the form of a surface of rotation about said axis. The listed elements form a deaf longitudinal combustion chamber in the front zone of this casing; means intended for the formation of a water circulation chamber in contact with the transverse and longitudinal walls from the outside in relation to this casing; a longitudinal sleeve having, at least approximately, a cylindrical shape in the form of a surface of rotation around the mentioned axis and located inside the rear zone of the casing in such a way as to limit the combustion chamber in this zone and define in it, together with the longitudinal wall, an annular chamber for the passage of gaseous combustion products fuel; means of ensuring the supply of gaseous products of fuel combustion from the combustion chamber to the mentioned passage chamber; means of ensuring the exit of gaseous products of fuel combustion from the passage chamber in the direction of the smoke removal system; heat exchange fins located in the chamber for the passage of gaseous fuel combustion products in such a way that, together with the longitudinal wall and the pipe, form guide channels in this chamber for the movement of these gaseous fuel combustion products in the section from the mentioned means of ensuring their supply to the mentioned means of ensuring their exit, and these ribs are in thermal conduction, at least with the longitudinal wall.

The task of the proposed invention is to further improve the conditions and possibilities of heat exchange between gaseous products of fuel combustion and water.

To solve this problem, in accordance with this invention, a heating unit of the type described above is proposed, which is characterized by the fact that the heat exchange ribs and guide channels are made annular and transverse, as well as by the fact that the means for ensuring the supply and the means for ensuring the exit of gaseous products of fuel combustion contain a corresponding longitudinal collector , serving the mentioned channels in parallel.

It is not difficult to understand that with identical dimensional parameters of the heating unit and, in particular, its sleeve, the special arrangement of the ribs and channels according to this invention allows to significantly increase the length of the trajectory traveled by the flow of gaseous products of fuel combustion in contact with the longitudinal wall of the casing or with those ribs, which are in a thermal conductivity relationship with it, i.e. to an even greater extent increase the possibilities of heat exchange between the gaseous products of fuel combustion and water that is in contact with this longitudinal wall, at the level of the back zone of the casing, naturally, without affecting the possibilities of heat exchange, which is at the level of the front zone of this casing, that is, to provide even greater opportunities for recuperation of thermal energy produced as a result of fuel combustion.

The use of the proposed invention also allows, with equivalent heat exchange capabilities, to reduce the dimensional parameters of the heating unit in comparison with the dimensional parameters of the heating unit used in the above-mentioned known water boilers, in particular, in the longitudinal direction, since it is possible to place the same length the trajectory taken by the flow of gaseous products of fuel combustion at the level of the rear zone of the casing, with smaller longitudinal dimensions of this rear zone, as well as the sleeve, with equivalent transverse dimensions of the heating unit.

In order to increase this advantage, zigzag-shaped partitions can be made inside the guide channels, which lengthen the trajectory overcome by the gaseous products of fuel combustion, and force them to pass along, in particular, the mentioned longitudinal wall and/or ribs installed in a thermal conduction relationship with this longitudinal wall, to ensure the most favorable conditions of heat exchange between gaseous products of fuel combustion and this wall and/or these ribs, as well as to improve with the help of this wall the conditions of heat exchange between gaseous products of fuel combustion and water that washes this wall from the outside.

As will be clear from the further description, the achievement of the set goal is significantly helped by the establishment of a special circuit for the movement of gaseous fuel combustion products between the combustion chamber, means of ensuring the supply of these gaseous combustion products into the passage chamber, starting from the combustion chamber, and means of ensuring their exit outside the passage chamber in directions of the smoke removal system.

This can be ensured in the event that the location of the axis is chosen to be approximately horizontal, which is known in itself, and the inlet and outlet manifolds are placed respectively at the bottom and top of the passage chamber, on the one hand, and/or the longitudinal wall is formed in such a way that it has a ledge in the transition region between the front and rear zones, so as to have a part offset in the direction outwards with respect to the combustion chamber in the said rear zone, and so that the liner is installed essentially in direct continuation of the part of the longitudinal wall corresponding to the said front zone, with the other side

Indeed, these characteristics are advantageously combined with another, also preferred, characteristic, according to which the heat exchange fins are mainly made continuous in the circumferential direction, except for two breaks located respectively in places diametrically opposite with respect to the said axis, i.e. one corresponding input break and one corresponding output gap. In this case, the input gaps are located on the same side of the said axis and are located on the same line in the longitudinal direction in order to form part of the input collector, and the output gaps are located on the other side of this axis and are located on the same line in the longitudinal direction for to form part of the output manifold.

Indeed, in such a case, it can be envisaged that the part of the longitudinal wall corresponding to the front zone has a longitudinal groove located in line with the inlet gaps in the longitudinal direction and connected with them in order to form a part of the inlet collector. It is not difficult to understand that such a groove provides effective orientation of the flow of gaseous products of fuel combustion in the direction of the input gaps and in the direction of the transverse channels formed, in particular, by the mentioned ribs.

However, as a supplement or as a substitute, it is also possible to provide that the nozzle has a longitudinal cutout against inlet breaks, forming part of the inlet manifold, which allows to ensure not only the direct capture of the gaseous products of fuel combustion, which tend to move along the longitudinal wall in the front zone of the casing, but also to ensure the capture of those gaseous products of fuel combustion that come into contact with the shell in the rear area of the casing either because they are thrown into the said groove, if one is provided in this case, or because they depart in a radial direction from the flame torch. i burner or nozzle.

This cut-out in the preferred embodiment is a longitudinal slot made in the custom and facilitating, at the same time, the installation and dismantling of this custom, allowing the possibility of reducing its transverse dimensions by tightening or compressing this slot in the preferred method of implementing the invention, according to which the custom is removably inserted into the casing.

In addition, in the preferred embodiment of the invention, it is assumed that the part of the longitudinal wall, corresponding to the mentioned rear zone, had at least one longitudinal cutout, forming a part of the output collector, against the output gaps. In this way, the most effective capture of gaseous fuel combustion products coming from various channels is ensured.

In the preferred embodiment of the invention, the rib gaps corresponding to the inlet manifold have transverse dimensions that decrease in the backward direction, and the rib gaps corresponding to the outlet manifold have transverse dimensions that decrease in the forward direction, which allows for optimal distribution of gaseous fuel combustion products between different channels at their entrance and optimal capture of gaseous combustion products at the exit from these channels.

In addition to the gaps mentioned, corresponding to the inlet and outlet collectors, the heat exchange fins may also have localized gaps of usually several smaller transverse sizes, which, on the one hand, facilitate the distribution and release of mechanical stresses associated with thermal expansion, and on the other hand, allow to establish there is a mutual connection between the guide channels, which allows gases to pass from one channel, which, for example, may be blocked, to neighboring channels.

According to the preferred embodiment of the invention, these additional gaps are provided on each rib in two diametrically opposite ribs, located at right angles to the gaps corresponding to the inlet and outlet collectors, relative to the mentioned axis. However, this arrangement of these gaps is only an example of the implementation of the proposed invention and is not limiting.

It goes without saying that various ways of implementing the heating unit according to this invention can be considered. However, preference is given to the method of implementation, according to which the heat exchange ribs are rigidly fixed to the longitudinal wall. In particular, preference is given to the realization of the ribs as a single part with a longitudinal wall, which itself, in turn, is produced as a single part with a transverse wall by casting, and to fix it in a removable manner on this single part of a custom made, for example, in the form of a corresponding of a formed sheet of heat-resistant metal, which tightly expands on this part. This method of implementation allows simultaneously optimizing the manufacturing process of the heating unit and ensuring the possibility of dismantling, if necessary, its custom, for example, for the purpose of cleaning the guide channels for gaseous products of fuel combustion.

If necessary, zigzag partitions made of heat-resistant sheet metal in the form of strips inserted into these channels and having a wavy cross-section can be made in these guide channels.

Means intended for the formation of a water circulation chamber in contact with the longitudinal and transverse walls outside the casing of the heating unit, in the preferred version of the implementation, are made in the form of a single cast part together with the mentioned walls.

It is also possible to realize in a unitary or unified form heating blocks with dimensional parameters and construction of various parts, adapted for different required capacities of this water heating boiler.

On the other hand, it is also possible to carry out an adaptation of this kind, providing for the use of the modular principle of the implementation of the heating unit according to the proposed invention.

To be more specific, it is possible to provide such a design, according to which this heating unit contains at least two modules adjacent to each other in the longitudinal direction and located coaxially, rigidly connected to each other, namely: one front module containing at least , the transverse wall of the casing and means intended for the formation of a water circulation chamber in contact with this transverse wall of the casing; at least one rear module containing at least one section of the longitudinal wall of the casing, means for forming a water circulation chamber in contact with this section, corresponding heat exchange fins and corresponding inlet and outlet collectors.

It is also possible to connect a certain number of rear modules to the front module, depending on the required performance of this water boiler, which allows to ensure the standardization of the production of these modules. However, in the preferred version of the implementation of this invention, the custom is common to different sections of the longitudinal wall of the casing and, as a result, has corresponding longitudinal dimensions.

In the preferred embodiment of the proposed invention, the front module also contains a section of the longitudinal wall of the casing, and also contains means for forming a water circulation chamber in contact with this section of the longitudinal wall, corresponding heat exchange fins and corresponding inlet and outlet collectors. At the same time, this front module can also be used without connection to the rear module, and in this case corresponds to the minimum performance provided by the modular design of the heating unit according to this invention.

In this variant of implementation, in the case when this front module is connected to at least one rear module, the custom is preferably common to the sections of the longitudinal wall corresponding to the front module and the expected number of rear modules.

In this case, the front module can be in all respects similar to the heating module of the unitary design with all its above-mentioned implementation possibilities. The rear module can also be a unitary structure that combines the corresponding section of the longitudinal wall of the casing, the means intended for the formation of a water circulation chamber in contact with this section of the longitudinal wall, the corresponding inlet and outlet collectors and, in the preferred embodiment of the invention, the corresponding ribs heat exchange with zigzag partitions, if necessary, inserted inside the guide channels for gaseous products of fuel combustion.

It goes without saying that in any adopted method of implementing the proposed invention, means are provided for ensuring the circulation of water between different parts of the water circulation chamber, corresponding to different modules. Such means are well known in themselves and have, for example, the form of conical couplings, which are usually denoted by the English term "Mirrie5".

In addition, the connection of various modules to each other can be provided using means well known from the existing state of the art, for example, using longitudinal levers forming a connecting rod.

To the extent that the front module and the rear module of the heating unit according to the proposed invention represent the characteristics of the transverse orientation of the heat exchange ribs and guide channels in order to form a transverse and parallel circulation of gaseous fuel combustion products in these channels, the present invention also relates to the front and rear modules of the structure described above.

Other characteristics and advantages of the proposed invention will be better understood from the following description of an example of its implementation, which is not limiting, where reference is made to the figures given in the appendix and which are an integral part of this description, among which:

Fig. 1 is a schematic view in section along the vertical plane of symmetry, i.e. along the vertical plane containing the longitudinal axis of the heating unit, located in this case horizontally, of a water heating boiler equipped with a heating unit according to the proposed invention;

Fig. 2 is a schematic perspective view in section along two half-planes passing through its longitudinal axis of the heating unit in accordance with the proposed invention, with a dash-dotted line marking the overall contour of this water heating boiler;

Fig. C is a schematic perspective view in general of the heating unit according to the proposed invention;

Fig. 4 is a schematic perspective view in section along the same vertical plane of symmetry as the section shown in Fig. 1 of the casing of the heating unit according to the proposed invention, and the said section plane is indicated in Fig. 3 by the symbols IM - IM , but the view shown is the reverse of the view shown in Fig.1;

Fig. 5 is a schematic view from above in a section along a horizontal plane, in which its longitudinal axis is located and which is marked by the symbols U - M in Fig. 3, the casing of the heating unit;

Fig. 6 is a schematic view in a cross-section along the plane marked by the symbols MI - MI in Fig. 5, the installation of a zigzag ribbon partition in one of the guide channels of the chamber for the passage of gaseous products of fuel combustion;

Fig. 7 is a schematic view in section along the longitudinal half-plane, limited by the longitudinal axis and marked with the symbol MYI in Fig. b, of the structure shown in Fig. b;

Fig. 8 is a schematic perspective view, similar to the view shown in Fig. 2, of a modular version of the implementation of the heating unit for a water heating boiler according to the proposed invention.

First of all, in the further explanation, references will be given to fig. 1 - 7 and, in particular, to fig. 1, where as a non-limiting example of the implementation of a water heating boiler, which can contain a heating unit according to the proposed invention, a water heating boiler is schematically presented , specially designed for installation in the smoke channel. This means that such a heating unit can be installed in water heating boilers of many other types, for example, in boilers of central heating systems with an external burner or in boilers of the "piston" (air valve) type, which are built in, and that in these boilers both liquid boiler fuel and gas can be used.

This water boiler 1 contains inside the body 2, which has a general shape, for example, a parallelepiped, a heating unit 3, which has a longitudinal axis 4, in this case located horizontally, around which this heating unit C has a general shape of a body of rotation. To be more specific, the heating unit C is formed mainly of two components rigidly attached to each other, namely, the casing 5 and the sleeve b, and each of these components by itself has rotational symmetry with respect to the mentioned axis 4.

The cover 5, more clearly presented in Fig. 2 - 5, in the preferred embodiment of the invention is made in the form of a single cast part, which, relative to the longitudinal direction marked by position 7, contains: the rear open transverse end 8, surrounded by a flat transverse annular wall 9, on to which a transverse heat-insulating hatch 48, on which a burner or nozzle 10 is fixed, the type of which corresponds to the fuel used in this case and which is capable of forming a flame I, oriented in direction 7 along axis 4, in the case when this water heating boiler 1 is in operation and working; the front transverse end 11, closed by a transverse wall 12, made in the form of a cap, the concavity of which faces in the backward direction, and a peripheral part 13, closed by a longitudinal wall 14, which has, at least approximately, a cylindrical shape in the form of a surface of rotation relative to the axis 4, thus , to form a longitudinal combustion chamber 15, deaf in the forward direction, where it is blocked by the wall 12, and open in the backward direction in the absence of the mentioned hatch 48. Thus, the longitudinal wall 14 actually limits the combustion chamber 15 only in the front zone 16 of the casing.

Indeed, in the rear zone 17 of the casing, the wall 14 is duplicated in the direction of the longitudinal axis 4 by a sleeve 6, made in the form of a longitudinal tube of approximately cylindrical shape, forming a surface of rotation relative to the axis 4, and which defines in this rear zone 17, together with the wall 14, an annular passage chamber 18 gaseous products of fuel combustion.

Outside the combustion chamber 15, that is, respectively in the forward direction and in the direction of removal from the axis 4, the walls 12 and 14 are duplicated by the wall 19, 20, respectively, and the wall 9 connects the walls 14 and 20 around the open end 8 of the casing 5. Thus thus, the mentioned walls 9, 12, 14, 19 and 20, in the preferred embodiment of the invention, are made in the form of a single cast part, form a hermetic chamber 21 around the combustion chamber 15, intended for the circulation of water 22, which is used for heating or for various sanitary needs .

Connecting elements 23, 24, provided, respectively, in the lower zone of the wall 19 and in the upper zone of the wall 20, allow to hermetically connect the pipelines 25 and 26, respectively, to the casing 5, intended for communication with the circuit of use external to the water heating boiler 1 of water heated in it 22.

If necessary, and in a way well known from the existing state of the art, not illustrated in the attached figures, the mentioned hatch 48 can also limit from the inside the hermetic water circulation chamber 22, connected to the chamber 21.

In the preferred embodiment of the proposed invention illustrated in the attached figures, the wall 14 does not have a constant internal diameter along its entire length from the place of its connection with the wall 12 to the place of its connection with the wall 9, but contains two different from each other, corresponding to the front zone 16 and the rear zone 17 of the casing 5.

More specifically, in each of these zones 16 and 17, the wall 14 contains a cylindrical part, respectively 27, 28, which is a surface of rotation with respect to the axis 4, but the part 28 corresponding to the rear zone 17 has an inner diameter that exceeds the inner diameter of the 27, corresponding to the front zone 16, and both of these parts 27 and 28 are connected to each other by means of a part 29 of the wall 14, made in the form of a ledge. More specifically, the part 29 of the wall 14 is flat and circular in the form of a surface of rotation relative to the axis 4, and forms inside the combustion chamber 15 a projection facing backwards.

In accordance with this design of the wall 14, the custom 6 is placed in the direct longitudinal extension of the part 27 of the wall 14, corresponding to the front zone 17, and abuts with a splash in the forward direction against the part 29 of the wall 14 in the immediate vicinity of the junction between the parts 27 and 29 of this wall with its flat ring edge ZO, forming a surface of rotation relative to axis 4.

Behind this flat edge ZO, the swashplate 6 has the general shape of a tubular wall 31, the axis of which is axis 4 and which has a constant diameter, both inside and outside, up to the rear flat annular edge 32, the axis of rotation of which is also axis 4, and this flat edge 32 essentially coincides with the surface of the wall 9 and, in the preferred embodiment, is surrounded in the direction of removal from the axis 4 by an annular flange 33, which is a surface of rotation relative to the same axis 4 and rests with its plane against the wall 9 and behind it, in the totality of the peripheral part of the rear open end 8 of the casing 5 in the case when this custom 6, also with a splash, rests with its front flat edge ZO on the part 29 of the longitudinal wall 14.

In the preferred embodiment, the custom 6 is made by forming a sheet of heat-resistant metal in an appropriate manner. This custom is removably inserted inside the casing 5 so as to ensure the possibility of its dismantling for the purpose of cleaning the chamber 18 with subsequent reverse installation, if necessary, to the former place or for the purpose of replacing this custom. For this purpose, in the preferred embodiment of the invention, the sleeve 6 in the state in which it is, being inserted inside the casing 5, contains an open longitudinal slot 62, which runs from its edge ZO to its edge 32 and which continues on the flange 33. This slot 62 , which has a width measured in the circumferential direction in relation to the axis 4, strictly sufficient to ensure that it can enter the circuit of the movement of gaseous products of fuel combustion, which will be described in more detail in the following description, additionally allows elastically deforming the rod 6 in the direction reducing its transverse size in order to ensure the possibility of its extraction from the casing 5 and re-insertion into this casing.

In order to exclude the possibility of untimely closing of this gap 62 in the case when the custom 6 is inserted inside the casing 5, special curved or rectilinear spacers 34, oriented essentially in the circumferential direction with respect to the axis 4, are installed, for example, in the front and rear end zones of this gap 62, which holds them in place due to compression. The total longitudinal size of these spacers 34 is small enough so that these spacers do not create significant obstacles to the passage of gaseous products of fuel combustion under conditions that will be described in more detail in the following description.

In the position when the sleeve 6 is inserted inside the casing 5, it is held in this position by means of a mold that ensures its forced expansion due to the elasticity of this sleeve. This elasticity leads to a tendency to increase its transverse size, which, if necessary, is facilitated by the action of the mentioned struts 34. The custom is held in the mentioned position also by means of a stop in the direction of removal from the axis 4, due to its mentioned elasticity, in the ribs 35 fixed inside the chamber 181i, in the preferred embodiment, are made as a single part with part 28 of the wall 14 in order to determine, together with this part 28 and the custom b, that guide the channels 36 for the passage of gaseous products of fuel combustion, located in the inner cavity of this passage chamber 18.

It should be noted here that the fins 35 can also be attached to the interior of the casing 5 without going beyond the scope of the present invention, provided that they are installed in a thermally conductive relationship with the wall 14 in order to transfer the heat in the best conditions. the energy obtained from the gaseous products of fuel combustion to the water 22 passing through the chamber 21.

But in a distinctive manner, characteristic of the proposed invention, the ribs 35 and guide channels 36, the formation of which these ribs contribute to, are annular and transverse.

More specifically, the ribs 35 are circular, flat and form a surface of rotation relative to the axis 4, to which these ribs are respectively perpendicular. In their main part, these ribs are continuous in the circumferential direction relative to this axis 4, with the exception of two breaks localized, respectively, diametrically opposite to the axis 4, more precisely, located in the same middle vertical plane 37, which contains axis 4 and which is a sectional plane in the views shown in fig. 1 and 4, that is, the planes of symmetry of the entire heating unit 3. In this case, one break, respectively break 38, is located under the axis 4 in the lower zone of the chamber 18, and the other break, respectively break 39, is located above this axis 4 in the upper zone of this chamber 18 .

Thus, the gaps 38 of the different ribs 35 are aligned longitudinally to form part of the longitudinal inlet manifold 40 for the gaseous fuel combustion products in the lower part of the chamber 18, and similarly the gaps 39 of the different ribs 35 are aligned in the longitudinal direction in order to form part of the longitudinal collector 41, intended for the output of gaseous products of fuel combustion after their passage through the chamber 18, in the upper part of this chamber.

In the preferred embodiment of the proposed invention illustrated in the attached figures, the gaps 38 and 39 are defined, respectively, by the flat edges 42, 43 of the ribs 35, which are made inclined with respect to the plane 37, from which these flat edges gradually move away in the direction of removal from the part 28 of the wall 14, so that the cross-section of each gap 38, 39 has the general shape of an isosceles trapezoid, the small base of which passes along this part 28, and the large base passes along the tubular wall 31 of the sleeve 6.

This design facilitates the direct implementation of gaps 38, 39 in the casting process in the case when these ribs 35, according to the preferred embodiment, are cast as a single part with the casing 5.

As can be more clearly seen in Fig.5, the gaps 38 in each rib 35, thus formed with the help of two edges 42, have a cross-section that decreases in the direction from front to back. And, as can be seen in Fig. 2, the cross-sections of the gaps 39, formed by the two edges 42 of each rib 35, increase in the backward direction in order to best ensure the distribution of the gaseous products of fuel combustion in the various channels 36, starting from the inlet manifold 40 and up to the outlet manifold 41.

In the embodiment of the proposed invention illustrated here, the ribs 35 are equidistant from each other or equidistant in the longitudinal direction. At the same time, the ribs 35 closest to the open end 8 are located in the immediate continuation of the wall 9, and the ribs 35 closest to the part 29 of the wall 14 are located at such a longitudinal distance from this part 29 that corresponds to the mutual longitudinal interval between two adjacent ribs 35. However, another arrangement of these ribs can also be chosen without going beyond the scope of the proposed invention.

In the direction of the axis 4, each rib 35 is limited by a corresponding edge 44, which forms a cylindrical surface of rotation around this axis, and the diameters of the different edges 44 are identical and exceed the inner diameter of the part 27 of the wall 14 by an amount that essentially corresponds to the thickness of the wall of the sleeve 6 in its tubular part 31 in such a way that this tubular part 31 continues part 27 of the longitudinal wall 14 in the backward direction without forming a noticeable ledge inside the combustion chamber 15.

If necessary, as illustrated in the embodiment of the invention considered here, the ribs 35 may contain, in addition to the gaps 38 and 39, corresponding to the inlet manifold 40 and the outlet manifold 41, and other localized gaps 45 having the form of notches, made in their edges 35 in the radial direction in relation to the axis 4 at a radial distance smaller than the radial distance that separates the edges 44 of the ribs 35 and part 28 of the wall 14.

These gaps 45, which have the cross-sectional shape of, for example, an isosceles trapezoid, that is, a shape similar to that of the gaps 38 and 39 in the cross-section, do not usually perform the function of ensuring the transition of gases from one channel 36 to another and serve, mainly , to absorb and compensate for the thermal expansion of the ribs 35 and to facilitate the operations of inserting into the casing and extracting the sleeve 6 from it. However, in case of blockage of one of the channels 36, these gaps allow the gaseous products of fuel combustion to pass from the blocked channel to the adjacent channels, i.e. the best image to be distributed in chamber 18, despite this blockage.

Like breaks 38 and 39, these additional breaks are aligned longitudinally. In this case, it is assumed, for example, two sets of these breaks, located in diametrically opposite positions in relation to the axis 4 and lying in the middle horizontal plane 46, which contains this axis 4 and forming the plane of the cut in the drawing shown in Fig.5. These fractures have a cross-section significantly smaller than the cross-section of fractures 38 and 39.

In the backward direction at the level of the open end 8 of the casing 5, the gaps 38, 39 and 45 in those ribs 35 that correspond to the wall 9 are closed hermetically, like this end 8 itself, with a heat-insulating hatch 48 in the case when this hatch is installed on the intended for his place

In order to ensure the possibility of gaseous fuel combustion products getting into the gaps 38 of the ribs 35 and from there into the inner cavities of the channels 36 from the combustion chamber 15 in the front zone 16, the inlet manifold 40 additionally contains a longitudinal groove 47, made recessed in part 27 of the wall 14, and also in the peripheral zone of the wall 12, corresponding to the transition area between this wall and the wall 14. This groove 47, which has a depth in relation to the wall 12 and in relation to the part 27 of the wall 14, which gradually increases in the direction from front to back, is symmetrical with respect to to the plane 37 and is located in the longitudinal direction on the same line as the gaps 38 of the ribs 35.

Thus, the gaseous products of fuel combustion, which are ejected by the flame torch in the forward direction, are then directed by the wall 12 to its peripheral part, that is, in the radial direction away from the axis 4. These gaseous products of fuel combustion then pass along the part 27 of the wall 14 , fall into the groove 47 and through this groove reach the gaps 38 of the ribs 35 in order to fill the various parallel channels 36 and pass through the chamber 18 in the form of transverse semi-rings, rising into the zones of the channels 36, which are located on one and the other side of the plane, respectively 37 and symmetrical with respect to this plane.

Further, these gaseous products of fuel combustion leave the parallel channels 36 at the level of gaps 39 in these channels and are collected in the output collector 41 after performing heat exchange with water 22 either directly through parts 28 and 29 of the wall 14, or indirectly with the help of heat exchange ribs 35 installed in terms of thermal conductivity with part 28 of wall 14, which itself is already in direct contact with water 22.

Above the gaps 39 of the ribs 35, the outlet manifold 41 includes a longitudinal cutout 49 common to the entire assembly (or substantially the entire assembly) of the gaps 39, and this cutout 49 passes through the portion 28 of the wall 14 and the corresponding portion of the wall 20, being sealed with respect to the chamber 21 water circulation with the help of a tubular wall 50, in the preferred version of the implementation made together with the casing 5. The channels 36 are limited by the ribs 35, the breaks 39 of which may, if necessary, not be located against the cutout 49, as is the case in the case of the front border channels in the illustrated here, examples of the implementation of this invention are connected by this cutout 49 with the help of gaps 39 of the corresponding ribs.

In the circumferential direction with respect to the axis 4, the cutout 49, that is, the wall 50 from the inside, can have a size equal to or greater than the smallest distance separating the two edges 43, that is, the size that the smallest gap 39 has in the immediate vicinity of the part 28 of the wall 14. In the event that this dimension of the cutout 49 or the wall 50 exceeds the distance separating in the circumferential direction the edges 43 that limit the gap 39 at the level of the part 28 of the wall 14, the corresponding ribs 35 can continue in the inner cavity of the cutout 49, in particular, with their edges 43 (this is not shown in the attached figures, but can easily be understood by a person skilled in the art).

Around the cut-out 49, the wall 20 forms a flange 51 of a hermetic and removable connection, for example by means of tightening screws, with a smoke box 52 located in the longitudinal direction along the casing and above it and connected to the system 53 of removal, usually to the atmosphere , gaseous products of fuel combustion.

This trajectory, which is passed mainly by the mass of gaseous products of fuel combustion, is schematically represented in Fig. 2 by a longitudinal arrow 54 located along the axis 4 and facing the direction 7, as well as by arrows 55 passing along the wall 12 and oriented in the direction of removal from axis 4, by arrows 56, which bend in the circumferential direction towards the groove 47, by a double arrow 57, which passes along this groove 47 in the backward direction and which bends towards the channels 36, and by ascending circular arrows 58, which pass along the channels 36 and correspond only those channels 36 that open into the output collector 39, and are represented as those that exit from these channels 36 and that pass in the upward direction through the cut-out 49.

It goes without saying that the construction of the groove 47 is optimized in such a way that it is able to collect the maximum possible amount of gaseous products of fuel combustion.

For this purpose, in the example of implementation of the proposed invention illustrated here, this groove has a bottom wall 59, which is defined by approximately rectilinear generators, perpendicular to the plane 37, in relation to which these generators, respectively, are symmetrical. This bottom wall 59 in the top view has approximately the shape of an isosceles trapezoid so that its width, measured perpendicular to the plane 37, increases in the rearward direction, where this bottom wall 59 communicates without a transition zone with part 28 of the wall 14, part 29 of which has a local cutout .

The maximum width of this bottom wall 59 in the zone of its connection with part 28 of wall 14 slightly exceeds the distance that separates perpendicularly to the plane 37 the connection of the edges 42 of the ribs 35, closest to the wall 29, at the level of the connection of the ribs 35 with the part 28 of the wall 14, in such a way as to feed the channel 36 closest to the part 29 of the wall 14 with gaseous products of fuel combustion.

As is not difficult to understand by a person skilled in the art, the elements defining the bottom wall 59 of the groove 47 in the preferred embodiment have a slight curvature, the concavity of which is directed towards the axis 4, in such a way as to ensure the mentioned connection with the part 28 of the wall 14. However , taking into account the small angular expansion of the bottom wall 59 of the groove 47 in relation to the axis 4, these generators can be considered as approximately rectilinear with an acceptable degree of approximation.

Accordingly, on one and the other side of the bottom wall 59, the groove 47 is defined by two side walls 60, which hermetically connect the bottom wall 59 with part 27 of wall 14 and with part 29 of this wall, while maintaining the tightness of the chamber 22. These side walls 60 diverge from each other in the backward direction in such a way that when they are connected to the transitional area between parts 27 and 29 of the longitudinal wall 14, they stand apart from each other at a distance slightly greater than the distance that separates the junctions of the two edges 42 at this level , surrounding the gap 38 of the rib 35 closest to the wall 29, at the level of the connection of these edges 42 with the edge 44, in such a way as to ensure the entry of gaseous fuel combustion products into the channel 36, closest to the part 29 of the wall 14. In the direction inside the combustion chamber 15, the side walls 60 in the preferred embodiment of the invention are connected to the part 29 of the longitudinal wall 14 along the corresponding rectilinear rib 61, and these two ribs 61 move away from each other in the direction of approach to the axis 4 in the same way as edges 42 surrounding the gap 38 of each rib 35.

It goes without saying that the walls 59 and 60 are made as a single part with the other part of the casing 5.

In order to provide an additional possibility of collecting and introducing into the channels 36 through gaps 38 in these channels those gaseous products of fuel combustion that did not enter the groove 47 and reached the rear zone 17 of the casing, moving along part 27 of the longitudinal wall 14, and then along the tubular of the walls 31 of the casing 6, the inlet manifold 40 additionally contains a longitudinal cutout defined by the slot 62 in the tubular wall 31 of the casing. This gap is placed directly against the gaps 38 in the ribs 35 and has a width in the circumferential direction with respect to the axis 4, which essentially coincides with the size that these gaps 38 have in the circumferential direction with respect to the axis 4 in the zone closest to this gap.

Thus, the gaseous products of fuel combustion that have reached the zone 17 are deflected in a downward direction, moving along the tubular wall 31 of the nozzle 6, as shown schematically by the arrow 63 on one side of the nozzle 6, which is fully shown in Fig. 2, thus advancing in downwards as far as the cutout or slit 62. Then these gaseous products of combustion enter the said slit, as shown schematically by arrow 64, and then pass through the channels 36 in a transverse trajectory defined by the fins 35 until they reach the output collector 41, passing through the same the path, which is schematically represented by arrows 58 and through which the gaseous products of fuel combustion, collected by means of the groove 47, pass.

It is not difficult to imagine that such a design of the device according to the proposed invention makes it possible to force the entire set of gaseous fuel combustion products, regardless of the characteristics of the trajectories that these combustion products pass inside the combustion chamber 15, to overcome the transverse trajectory between the rule 6 and part 28 of the longitudinal wall 14, i.e. a particularly long trajectory, taking into account the longitudinal size of the pipe 6. This circumstance allows for significantly improved heat exchange conditions between the gaseous fuel combustion products and water 22 in comparison with the heat exchange conditions typical of the existing state-of-the-art in this area and described in the preamble of this description of water heating boilers.

It is possible to increase even more the length of the path that the gaseous products of fuel combustion pass in the chamber 18 with the same longitudinal dimensions of this chamber, that is, with the same longitudinal dimensions of the pipe 6, and to an even greater extent to improve the heat exchange between these gaseous products of fuel combustion and water 22, if special zigzag partitions are installed inside the channels 36. These zigzag partitions 65 can be implemented in various ways, but fig. b6 and 7 schematically present a specific and preferred method from the point of view of ease of manufacture, according to which in each of the halves of each channel 36 type of those halves, which are defined by the plane 37, a bent tape 66 is inserted, made of a heat-resistant metal sheet and having a wavy profile in the cross section.

In the circumferential direction, for each of these wavy bands 66, the dimensional parameters are determined in such a way as to leave free at least the gaps 38 and 39 of the ribs 35, which correspond to the inlet manifold 40 and the outlet manifold 41, in order not to disturb the normal distribution of gaseous combustion products of fuel between different channels 36.

More specifically, in the preferred embodiment of the proposed invention illustrated here, each wavy band 66 that corresponds to a half of a given channel 36 passes in a section approximately 90" long inside this half with respect to the axis 4, namely, from the gaps 45 of the ribs to the gaps 39 of these ribs, and all these wavy bands 66, located on the same side of the plane 37, are connected to each other by means of two rigid and mostly metal rectilinear bridges 67 and 68, respectively, to which they are connected, for example, by welding and which pass respectively in the gaps 45 and in the gaps 39 in order to prevent displacement of the mentioned wavy strips 66 in the circumferential direction with respect to the axis 4.

In the transverse direction, the mentioned jumpers 67 and 68 have dimensions smaller than the dimensions of the gaps 45 and 49, respectively, in order to minimally interfere with the passage of gaseous products of fuel combustion through the mentioned gaps.

In the longitudinal direction, each wavy tape 66 in the preferred embodiment has a width smaller than the width of the corresponding channel 36, measured between the ribs 35 that limit this channel, and constituting, for example, approximately half the width of the given channel 36, in relation to which this wavy the strip 66 is centered longitudinally so as to leave a through passage 69 for the gaseous products of combustion of the fuel against each of these ribs 35 so as to facilitate the direct contact and heat exchange with them of the gaseous products of combustion of the fuel and, with their assistance, and with the assistance of wall 14, on which these ribs are installed with the possibility of thermal contact, heat exchange with water 22, which washes the wall 14.

In the radial direction with respect to the axis 4, each of the wavy bands 66 is dimensioned to leave a through passage 70 free for the gaseous products of combustion of the fuel, at least along a portion 28 of the wall 14, in order to facilitate heat exchange between them gaseous combustion products and water 22 through the wall 14.

In the direction of the axis 4, each wavy tape 66 is held by a guide 6 (not shown in Fig. b and 7), against which it can rest either directly or with the help of the corresponding jumpers 67 and 68. The thickness of each wavy tape 66 and the amplitude of its waviness, measured in the radial direction in relation to the longitudinal axis 4, are selected according to the specific considerations of a specialist in this field of technology.

Thus, the use of the heating unit according to the proposed invention allows to significantly improve the ratio between the output power in the form of thermal energy transmitted to the water 22 and the overall dimensions of this water heating boiler.

However, a specialist in this field of technology will easily understand that the above-described way of implementing the proposed invention is only an example of such an implementation that is not limiting, in relation to which numerous options can be considered that do not go beyond the scope of this invention.

In particular, at this time preference is given to a design in which the combustion chamber 15, formed in the zones 16 and 17 respectively by the part 27 of the wall 14 and the tubular wall 31 of the liner 6, has a constant cross-section along its entire length between the rear open end 8 and the wall 12 , which defines the front closed end 11. However, it is also possible to provide that the sleeve 31 corresponds to the narrowing of the combustion chamber 15 in the zone 17 compared to the zone 16. A specialist in this field of technology will be able to adapt the structural elements described above to such a structure of the combustion chamber without much effort . And also, instead of being horizontal, as was the case in the above-described example of the implementation of this invention, the axis 4 of the heating unit C can be located vertically or at some angle in relation to the horizontal plane, and the mentioned direction 7, which is the direction of emission flame torch, in this case usually oriented downwards.

The heating unit according to the proposed invention, in the form in which it was described above with reference to figures 1 to 7, can be implemented in different dimensional options, each of which corresponds to a certain range of the required thermal performance of this water boiler.

It is possible, however, to envisage a modular version of the implementation of such a heating unit in order to ensure the possibility of its adaptation to different values of the required thermal performance, based on the use of different standardized modules that connect together in such a quantity that provides the required performance in this case .

Figure 8, which will be referred to later, schematically shows such a modular way of implementing the heating unit according to the proposed invention.

In this implementation example, the heating unit consists of two different modules, namely: the first or front module, which is almost completely identical to the heating unit C described above, except that the mentioned custom is common to the two modules. Thus, here it is quite legitimate to retain the use of position C to denote this front module, as well as the use of the same positions as in Fig. 1 - 7, to denote different components or different elements of the components of this front module 3. In particular, the concept of " "front" or "rear" used in the following statement must be understood in relation to the mentioned direction 7; rear module 103, coaxial with the front module C and adjacent to it in the longitudinal direction behind this front module. The rear module has a significant degree of similarity with the part of the heating unit 3 described above, corresponding to the rear area 17 of the casing, so that the same numerical positions are used here, but increased by 100, to indicate the various components or parts of components of this rear module 103, which correspond to the components or parts of the components of the above-described heating unit C or the front module 3. It goes without saying that several modules identical to the rear module 103 can be connected to each other coaxially in the longitudinal direction behind the front module 3, and in the preferred embodiment, the mentioned custom is common to the entire set of modules connected in this way.

This custom is marked in Fig. 8 by the position 106 in order to take into account the increase in the longitudinal size of its tubular wall 131, in principle, in all parameters, absolutely similar to the tubular wall 31 according to the fact that it must be common to the two modules C and 103.

With the same numerical positions, but increased by 100, the other parts of the custom 6 are marked, the slot 162 of which, which is located in the same way as described above, is held in the open position by means of spacers 134, which in all parameters are absolutely similar to the spacers 34 described above , but installed in an amount that can be increased according to the increase in the length of the tubular wall 131. In this case, three such struts are installed, namely, the front limit strut, the rear limit strut and the intermediate strut, located between the two previous struts at equal distances from them in the area of the connection of two modules Z and 103.

Taking into account the similarity mentioned above, the module 103 of this heating unit contains, in addition to the sleeve 106, which is common to the module 3, the casing 105, in the preferred embodiment, is made in the form of a single cast part, which generally has rotational symmetry with respect to axis 4. This casing contains: the transverse wall 109 and the longitudinal wall 128, which are identical, respectively, to the wall 9 and part 28 of the longitudinal wall 14 of the casing 5 of the front module 3; transverse ribs 135, identical to the mentioned ribs 35 and limiting inside the transverse annular chamber 118 the circulation of gaseous products of fuel combustion, the wall defined by 128, the casing 105 and the wall

131 nozzles 106, transverse guide channels 136 are designed for the movement of these gaseous products of fuel combustion; transverse walls 129 and longitudinal walls 120 are identical, respectively, to part 29 of wall 14 of casing 5 of module C and walls 20 of this casing 5. At the same time, only wall 129 continues in the direction of removal from axis 4 in the region of its connection with wall 128, and this happens up to to the wall 120, with which it is hermetically connected.

Thus, the walls 109, 128, 129, 120 together and hermetically limit the hermetic chamber 121 of the circulation of water 22, which also circulates in the chamber 21 of the casing 5 of the module 3, and the connection of these two chambers 21 and 121 to ensure the possibility of such a common circulation is carried out in a manner well known to a person skilled in the art in a manner not illustrated in this example, using any appropriate means in this case, for example, the type of conical couplings already mentioned here, called "Mirrie5".

Indeed, the casing 105 is tightly adjoined by its wall 129 to the wall 9 of the casing 5 and both of these casings are connected to each other by means of any appropriate means in this case, well known to a person skilled in the art and also not shown in fig. 8, for example, with the help of rods forming a connecting rod.

In this case, it is the wall 109 that limits the heating unit formed by two modules C and 103, the rear transverse open end 108, in all respects absolutely identical to the rear end 8 of the heating unit C, described above with reference to Fig. 1 - 7, which is similar in this way, a removable and sealed transverse heat-insulating hatch can be installed, for example, with water, on which a nozzle or a burner is fixed, corresponding to the type of fuel used in this case and which forms a flame torch along the axis 4 and in the direction 7 in conditions where water heating boiler 101, which contains a heating unit formed by two modules C and 103, is in a state of operation and works.

This installation of the heat-insulating hatch and the burner or nozzle installed on it is not illustrated here in detail, but a specialist in this field of technology will easily understand that it flows with all obviousness from the above-described design, schematically illustrated in Fig. 1. In this case, the flange 133 of the sleeve 106 also abuts against the wall 109 in the same way as the flange 33 of the sleeve 6 abuts against the wall 9 of the casing 5 of the heating unit 3, described above with reference to fig. from 1 to 7.

In order to ensure the possibility of introducing gaseous products of fuel combustion into the channels 136 in the same way as in the channels 36 described above, the ribs 135 represent, in the immediate longitudinal continuation of the gaps 38 of the ribs 35 of module 3, the gaps 138 are limited, like the gaps 38 ribs 35, so that the gaseous products of fuel combustion are fed in parallel to the channels 36 and 136 by means of the groove 47 and by means of the longitudinal arrangement on the same line of the breaks 38 and 138 of the ribs 35 and 135, as schematically shown by arrows 57 and, similarly, arrows 157, which continue the arrows 57 in the backward direction, and then divide in the circumferential direction at the level of the gaps 138, as the arrows 57 do at the level of the gaps 38.

In addition, the gaseous products of combustion of the fuel are fed in parallel to the channels 36 and 136 through the cutout 162 in the wall 131 of the cylinder 106 after these gaseous products of combustion have passed along the trajectory schematically represented by arrows 63 and 64, which can be seen identically on that part of the wall 131 of the wall 106, which corresponds to module 3, and arrows 163 and 164, which reproduce these arrows 63 and 64 at the level of that part of this wall 131, which corresponds to module 103.

Arrow 54 and arrows 55 and 56 are also identical, but longer, taking into account the longitudinal connection of two modules C and 103, which schematically represent the trajectory of the movement of gaseous products of fuel combustion in the front zone 16 of the casing 5 of module 3.

Thus, inside the channels 136, the gaseous products of fuel combustion pass parallel in each of these channels and parallel to the channels 36 in an upward circular trajectory relative to the axis 4, respectively, on one side and on the other side of the average vertical longitudinal plane, not shown in Fig. 8, but the corresponding plane 37, as shown schematically by arrows 158, identical to arrows 58 that can be seen at the level of module 3, in order to eventually exit these channels 136 through the gaps 139 of the ribs 135 located in the longitudinal direction in line with the gaps 39 of the ribs 35 and forming a part of the output collector 141, which belongs to module 103 and in all parameters is absolutely identical to the output collector 41, which belongs to module 3.

In particular, this output collector 141 additionally contains a longitudinal cutout 149, in all respects absolutely identical to the cutout 49 and common to the entire set (or almost the entire set) of breaks 139. This cut 49 passes through the wall 128 and through the corresponding part of the wall 120, being sealed in relation to the water circulation chamber 121 by means of a tubular wall 150, in all respects absolutely identical to the wall 50, and opens above the wall 120 by means of a removable and hermetic flange of connection by means of, for example, screwing, with a smoke box, in all the parameters are absolutely comparable to the smoke box 52, if we do not consider that it is connected in a similar way not only to the flange 151 of the output collector 141 of module 103, but also to the flange 51 of the output collector 41 of module 3.

The gaps 138 of the ribs 135, for their part, will form the inlet manifold 140, which belongs to the module 103 and which complements in the backward direction the inlet manifold 40, which is defined at the level of the module With the groove 47, the gaps 38 of the ribs 35 and the same cutout 162 in the tubular wall 131 customs 106.

At the same time, the ribs 135 contain on the same line in the longitudinal direction with the breaks 45 of the ribs 35, not shown in Fig. 8, breaks 145, in all parameters absolutely identical to the breaks 45 and providing the same function, and in the channels 136 of the module 103 , as well as in the channels 36 of the module 3, can be installed wavy bands, in all respects absolutely identical to the bands 66, in order to form zigzag-shaped partitions there, as was illustrated when considering the heating unit 3, described above with reference to fig. 1 - 7, more precisely, with reference to Fig. b6 and 7.

Thus, the heating unit, formed by connecting modules C and 103, is similar to the heating unit 3, described above with reference to Figs. 1 - 7, but has the dimensions of the rear zone 17 of the casing 5 increased in the longitudinal direction, in which the furnace the chamber 15 is limited in the peripheral direction not by the longitudinal wall 14 of this casing, but by the sleeve 6, while the front zone 16, limited only by the module 3, as is the case in the heating unit 3, described above with reference to the module 3, will remain unchanged.

More specifically, in this assembly, the casing 5 of the module C and the casing 105 of the module 103 complement each other in such a way that the part 28 of the longitudinal wall 14 of the casing 5 and the longitudinal wall 128 of the casing 105 are placed in longitudinal extension with respect to each other and having for example, the same diameter, can be considered as two sections of the same longitudinal wall, which replaces part 28 of the longitudinal wall 14 of the casing 5 of the heating unit 3, described above with reference to Fig. 1 - 7.

In a similar way, the common tube 106 takes the place of the common tube 6 with its increased longitudinal dimensions in order to limit the transverse annular chamber for the passage of gaseous products of fuel combustion, comparable in all parameters to the chamber 18 of the heating unit C, described above with reference to Figs. 1 - 7, but also having larger dimensions in the longitudinal direction and formed, at the level of module 3, by camera 18 of this module and, at the level of module 103, by camera 118 of this module.

Installed with the possibility of direct heat exchange through parts 28 and 29 of the longitudinal wall 14 of the casing 5 of module C and the longitudinal wall 128 of the casing 105 of module 103 with the same water 22 circulating in the interconnected chambers 21 and 121 of modules C and 103, respectively, which can be considered as a single chamber for the circulation of this water, corresponding to the chamber 21 of the heating unit 3, described above with reference to Fig. 1 - 7, but with increased longitudinal dimensions, the chamber for the passage of gaseous products of fuel combustion, thus formed by the chamber 18 of the module C and the chamber 118 of module 103, divided into annular channels 36 by transverse partitions 35 at the level of module C and divided into annular channels 136 by transverse partitions 135 at the level of module 103, and channels 36 and 136 are fed in parallel with gaseous products of fuel combustion by means of a longitudinal inlet manifold formed by inlet manifolds 40 and 140, and are served in parallel by a longitudinal output collector formed by the output pins torus 41 and 141, just like the channels 36 of the heating unit 3, described above with reference to fig. 1-7, are fed in parallel using the input manifold 40 of this heating unit and served in parallel by its output manifold 41.

It is easy for a person skilled in the art to understand that, under these conditions, adopting a design in which the module 103 is installed behind the module 3 allows doubling the length of the trajectory passed parallel in the transverse direction by the gaseous products of combustion of the fuel in comparison with the length of the trajectory that these gaseous products of combustion fuel pass in a single or unitary heating unit 3, described above with reference to Fig. 1 - 7, in the case when it is assumed that the number and dimensional parameters of the ribs 135 and guide channels 136 do not essentially differ from the number and dimensional parameters of the ribs 35 and guide channels 36.

It goes without saying that these quantities and these dimensional parameters can also be different as a function of the required thermal performance, which must be added to the heating unit formed by connecting modules of the type described above.

It also goes without saying that it is possible to increase the number of modules of the type described above used in this case, similar to the rear module 103, installed behind the module

With, to further increase the length of the mentioned transverse trajectory of movement of gaseous fuel combustion products by increasing the number of transverse channels passing parallel to these gaseous combustion products, i.e. to ensure adaptation of the system to higher requirements regarding the thermal performance of this water heating boiler.

In an implementation option not shown in the attached figures, it is also possible to provide for the implementation in the form of a front module of a set of parts of the module 3, which correspond to the front zone 16 of the casing 5, that is, walls 12 and 19 and parts 27 and 29 of the longitudinal wall 14, and part 29 in this case, it continues up to the wall 19 in the direction of removal from the axis 4 in order to connect hermetically with this wall 19 and form together with it the part corresponding to the water circulation chamber 21 22.

In this case, this front module will contain a groove 47 and will be complemented by a longitudinal connection in the rear direction of a number of rear modules, in all respects absolutely identical to the module 103 described above, for which the water circulation chambers 121 will communicate with the part of the chamber 21 that will be replaced, thus at the level of front module 3.

The number and dimensional parameters of modules 103 will be adapted accordingly to the required thermal performance of this water boiler. This variant of implementation was not illustrated in this description, but it is easily deduced from a comparison between the method of implementation of the proposed invention, described above with reference to Fig. 8, and the method of implementation of the present invention, described above with reference to Fig. 1 - 7.

It goes without saying that other variants of the implementation of the heating unit for the water heating boiler of the type described above, which do not go beyond the scope of the proposed invention, can also be considered.

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Claims (20)

1. Heating unit (3, 103) for a water heating boiler (1) operating on liquid fuel or gas, which includes: - a casing (5, 105) having a longitudinal axis (4) capable of interacting with a nozzle or by a burner (10) emitting along this axis (4) a flame torch of a certain direction (7) and holding the rear open transverse end (8, 108) used for placing the nozzle or burner (10), the front transverse end (11), closed by a transverse wall (12), and a peripheral part (13), closed by a longitudinal wall (14, 128), which has, at least approximately, a cylindrical shape of rotation relative to the axis (4), so as to form a blind longitudinal furnace camera (15) in the front area (16) of this casing (5, 105); - means (9, 19, 20, 109, 120, 128, 129) designed to limit the circulation of water (22) in the chamber (21, 121) in direct contact with the transverse (12) and longitudinal (14, 128) walls from the outside in relation to the casing (5.105); - a longitudinal sleeve (6), which has, at least approximately, a cylindrical shape of the surface of rotation relative to the axis (4) and is located inside the rear zone (17) of the casing (5, 105) in such a way as to limit the combustion chamber (15) in this zone and determine there, together with the longitudinal wall (14, 128), the annular chamber (18, 118) for the passage of gaseous fuel combustion products; - input means (40, 140), designed to ensure the supply of gaseous products of fuel combustion into the chamber for their passage (18, 118) from the combustion chamber (15); - output means (41, 141), designed to ensure the removal of gaseous fuel combustion products outside the passage chamber (18, 118) in the direction of their removal system (53); - ribs (35, 135), located in the passage chamber (18, 118) in such a way as to form in it, together with the longitudinal wall (14, 128) and the wall (b, 106), guiding channels for gaseous products of fuel combustion from input means (40, 140) in the direction of the output means (41, 141), and these ribs (35, 135) are in thermal contact, at least with the longitudinal wall (14, 128), which is characterized by the fact that the ribs (35, 135) and channels (36, 136) are annular and transverse, and the input (40, 140) and output (41, 141) means contain respective manifolds (40, 41, 140, 141) for parallel service of the channels (36, 136). 2. The heating unit according to claim 1, which is characterized in that the axis (4) is at least approximately horizontal, and the inlet manifold (40, 140) and the outlet manifold (41, 141) are located, respectively, in the lower part and in the upper part of the chamber passage (18, 118). 3. The heating unit according to any one of items 1 or 2, characterized in that the longitudinal wall (14, 128) includes a ledge (29) in the transition region between the front zone (16) and the rear zone (17) so that to form a part (28, 128) displaced outwardly from the combustion chamber (15) in the rear area (17), as well as where the sleeve (6, 106) is located essentially in the immediate longitudinal extension of the part (27) of the longitudinal wall ( 14, 128), corresponding to the front zone (16). 4. A heating unit according to any one of claims 1 to 3, characterized in that the fins (35) are substantially continuous in the circumferential direction except for two corresponding localized breaks (38, 39, 138, 139) diametrically opposite. in relation to the axis (4), namely, one input gap (38, 138) and one output gap (39, 139), and the input gaps (38, 138) are located on the same side in relation to the axis (4 ) and are longitudinally aligned to form part of the inlet manifold (40, 140), and the outlet gaps (39, 139) are located on the other side of the axis (4) and are longitudinally aligned for to form part of the output manifold (41,141). 5. The heating unit according to claim 4, characterized in that the gaps (38, 138) of the ribs (35, 135) corresponding to the inlet manifold (40, 140) have transverse dimensions that decrease in the backward direction, and the gaps (39, 139) ribs (35, 135) corresponding to the outlet collector (41) have transverse dimensions that decrease in the forward direction. 6. The heating unit according to item C in combination with any of items 4 and 5, which is characterized in that the part (27) of the longitudinal wall (14, 128) corresponding to the front zone (16) has a longitudinal groove (47) , located on the same line in the longitudinal direction with the input gaps (38, 138) and connects with these gaps to form part of the input collector (40, 140). 7. The heating unit according to any one of items 4 to 6, characterized in that the sleeve (6, 106) has a longitudinal cutout (62, 162) against the entrance gaps (38, 138), in particular, a longitudinal gap forming a part inlet manifold (40,140). 8. The heating unit according to any one of items 4 to 6, characterized in that the part (28, 128) of the longitudinal wall (14) corresponding to the rear area (17) has against exit gaps (39, 139) at least , one longitudinal cutout (49, 149) forming part of the outlet collector (41, 141). 9. The heating unit according to any of items 4 to 7, characterized in that the ribs (35, 135) contain additional localized breaks (45, 145) designed to release mechanical stresses and interconnect between the guide channels (36, 136), and these additional breaks (45, 145) have a cross-section smaller than the cross-section of the input breaks (38, 138) and the output breaks (39, 139). 10. The heating unit according to claim 9, which is characterized in that each rib (35, 135) contains two additional gaps (45, 145), located in diametrically opposite positions and oriented at right angles to the input gaps (38, 138) and output gaps (39,139) in relation to the axis (4). 11. The heating unit according to any of the items from 1 to 10, which is characterized by the fact that it contains inside the channels (36) zigzag partitions (65), contributing to the contact of gaseous products of fuel combustion with the longitudinal wall (14) and/or with the ribs (45). 12. The heating unit according to claim 11, which is characterized by the fact that the zigzag partitions (65) are formed by strips (66) inserted into channels (36) and corrugated in cross-section. 13. The heating unit according to any of items 1 to 11, characterized in that the ribs (35, 135) are rigidly connected to the longitudinal wall (14, 128). 14. The heating unit according to claim 13, which is characterized by the fact that the ribs (35, 135) are made in the form of a single part with a longitudinal wall (14, 128), which in turn is made in the form of a single part with a transverse wall (12) , and the custom (b, 106) is fixed on the mentioned part and is made removable. 15. The heating unit according to any one of items 1 to 14, which is characterized in that it contains at least two modules arranged coaxially, which are closely adjacent to each other, in the longitudinal direction, ensuring a rigid connection between them, namely: - the front module (3), containing at least the transverse wall (12) of the casing (5, 105) and means (9, 19, 20) designed to form the chamber (21, 121) of water circulation (22) and in contacts with the transverse wall (12); - at least one rear module (103), containing at least one section (128) of the longitudinal wall (14, 128) of the casing (5, 105), means (109, 120, 128, 129) designed to form a circulation chamber water (22, 122) in contact with this area (128), the corresponding ribs (135), as well as the corresponding inlet (140) and outlet (141) collectors. 16. The heating unit according to claim 15, which is characterized in that the front module (3) also contains a section (28) of the longitudinal wall (14, 128) of the casing (5, 105), means (9, 19, 20) intended for forming chambers (21, 121) of water circulation in contact with this area (28), corresponding ribs (35), as well as corresponding inlet (40) and outlet (41) collectors. 17. The heating unit according to any one of items 15 and 16, which is characterized in that the joint (106) is common to different sections (28, 128) of the longitudinal wall (14, 128) of the casing (5, 105). 18. The module intended for the implementation of the heating unit according to one of clauses 3 1 to 14, which is characterized by the fact that it contains at least the transverse wall (12) of the casing (5, 105) and means (9, 19, 20), designed to form a water circulation chamber (21, 121) (22) in contact with the transverse wall (12). 19. The module according to claim 18, which is characterized by the fact that it also contains a section (28) of the longitudinal wall (14, 128) of the casing (5, 105), means (9, 19, 20) intended for forming the chamber (21, 121 ) circulation of water in contact with this area (28), the corresponding ribs (35), as well as the corresponding inlet (40) and outlet (41) collectors. 20. A module designed to implement a heating unit according to any of items 1 to 14, which is characterized by the fact that it contains at least one section (128) of the longitudinal wall (14, 128) of the casing (5, 105), means (109, 120, 128, 129) designed to form a water circulation chamber (22, 122) in contact with this area (128), corresponding ribs (135), as well as corresponding inlet (140) and outlet (141) collectors .