EA021488B1 - Heating radiator element - Google Patents

Abstract

A heating radiator element (1) comprises a base body (2), which extends substantially along a main axis (X) between two opposite axial ends provided with respective transverse connection sleeves (5), and at least one set (26) of fins (25), which extend from a side (9) of the body (2), are arranged on one side of a centre plane (P) of the element (1), extend along respective axes (A) substantially parallel to the main axis (X), and are separated by grooves (28); the number of the fins (25) and their surface are selected in such to way as to have high efficiency of heat exchange: the element (1) consequently comprises an adequate number of surface fins (25) sufficient to guarantee a good value of thermal yield.

Description

The invention relates to a radiator element, in particular for heating buildings.

BACKGROUND OF THE INVENTION

As you know, a heating radiator can be formed by a battery of elements connected to each other to form a radiator of appropriate size; each element contains a housing made of metal material, inside of which a chamber is formed in which heating water circulates. Radiating plates and fins continue from the body through which the heat of the water is transferred to the external environment in which the radiator is installed.

From EP04811154 A1, publ. 04/22/1992, a radiator element is known that contains a main body, which extends essentially along the main axis between two opposite axial ends having corresponding transverse couplings and at least one set of ribs that protrude from the side wall of the body, located on one the sides of the central plane of the element extend along the corresponding axes, essentially parallel to the main longitudinal axis, and are separated by grooves.

A radiator element of the same type is also known from BE509170 A, publ. 29.02.1952.

Although the known radiator elements contain plates and fins having different shapes and arrangements, there are still opportunities to increase the efficiency of the known radiators.

Disclosure of invention

The aim of the present invention is to provide a very efficient radiator element that is both simple and relatively inexpensive to manufacture.

Thus, the present invention relates to a radiator element, which is determined by the main features in paragraph 1 of the attached claims, and by its additional features in the dependent claims.

The radiator formed by the elements in accordance with the invention has a higher efficiency compared to other known solutions, provided that the heat exchange surfaces and / or weight are the same, essentially the special configuration of the fins allows you to provide flow conditions that guarantee high heat transfer efficiency.

In addition, the element of the present invention can be manufactured in a relatively simple and inexpensive way and is also suitable for manufacturing, for example, from aluminum by injection molding and is therefore very convenient to manufacture.

Brief Description of the Drawings

Additional characteristics and advantages of the present invention will become apparent from the following description of a non-limiting example of its implementation with reference to the accompanying drawings, of which:

FIG. 1 is a schematic perspective view of a radiator element in accordance with the invention;

FIG. 2 is a schematic partial sectional view of a detail of the radiator element shown in FIG. one;

FIG. 3 is a schematic view of a detail of an embodiment of a radiator element shown in FIG. one; and FIG. 4 is a schematic perspective view of a radiator element in accordance with another embodiment of the invention.

Preferred Embodiment

With reference to FIG. 1 and 2, the radiator element 1 for heating buildings comprises a main body 2 made of a metal material, in particular aluminum, for example (but not necessarily) aluminum by injection molding; the housing 2 is a hollow housing containing a substantially tubular main body 3 extending longitudinally along the main axis X, which, with reference to the normal position when using the element 1, is essentially vertical; element 1 contains an inner chamber 4 for passing water and transverse couplings 5 for connection with other elements of the radiator and / or with a hydraulic circuit.

In FIG. 1, reference numeral H indicates the axial distance (measured parallel to the X axis) between the couplings 5; in particular, the distance H is the minimum distance between the couplings 5, measured between the respective mutually facing edges of the couplings 5.

In the non-limiting example shown in FIG. 1 and 2, the housing 2 comprises a front heat exchange plate 6, preferably facing, when in use, a heated external environment, and a rear heat exchange plate 7, opposite the front plate 6; moreover, the plates 6, 7 extend longitudinally along the corresponding axes Ζ parallel to the X axis and essentially parallel to each other, and are connected to the main part 3 by means of the corresponding central longitudinal ribs 8, which are located mainly in the central plane P of the element 1, extend radially from the main part 3 and are essentially perpendicular to the plates 6, 7.

In addition, element 1 contains two opposite walls 9 (only one is visible in FIG. 1), which contain corresponding opposite side surfaces 10: in non-limiting

- 1 021488 of the example shown in FIG. 1, 2 (but not necessarily), the side surfaces 10 are formed by the corresponding side surface sections of the main part 3 and the corresponding surfaces of the ribs 8.

The plates 6, 7 are bounded by corresponding pairs of opposite longitudinal side edges 11 and corresponding pairs of opposite surfaces 13, 14, for example (but not necessarily), essentially flat and parallel; in particular, each plate 6, 7 comprises an inner surface 13 facing another plate and an outer surface 14 opposite to the inner surface 13.

Element 1 comprises a plurality of ribs 25 that extend from the housing 2; in particular, said element comprises at least a first set of 26 ribs 25 that extend from wall 9, namely from the side surface 10 of said wall 9, and are all located on one side of the central plane P of element 1; preferably, element 1 comprises two sets 26 of opposing ribs 25, which extend from respective walls 9, namely from respective side surfaces 10 of walls 9, and are located on opposite sides of plane P.

The following describes a set of 26 ribs 25 contained in the wall 9; the ribs 25 of another set (optional) preferably have a structure and arrangement the same or similar and, preferably, symmetrical with respect to the ribs of the described set; in any case, it is understood that the two sets 26 may also contain ribs 25, which are different in shape, size and / or location.

The ribs 25 of the set 26 extend mainly in the longitudinal direction along the wall 9 and along the corresponding axes A, essentially parallel to the X axis. The ribs 25 are aligned along the corresponding essentially parallel axes A and are separated by corresponding groups of grooves 28.

The ribs 25 are optionally, but not necessarily, arranged in rows 27 parallel to each other and to the X axis; that is, a number of ribs 25 are lined up in a row 27. In the non-limiting example shown in FIG. 1, kit 26 comprises at least two, preferably at least three, adjacent rows of 27 ribs 25 aligned along respective axes A, essentially parallel to each other and the main axis X, and separated by corresponding groups of grooves 28; rows 27 are adjacent, that is, immediately following each other, in a direction transverse to the axes A, in the absence of any other set of ribs between them.

In the non-limiting example shown in FIG. 1, 2, the ribs 25 have a predominantly rectangular shape, optionally with curved edges and / or rounded edges; the grooves 28 are made essentially in the form of a group of slots located between two adjacent ribs 25.

Element 1 may also comprise ribs with curved sections, which are shown at the top of FIG. 1: it is understood below that all ribs 25 are included in kit 26, which contain at least one portion that extends along axis A parallel to axis X.

However, usually each rib 25 contains two opposing surfaces 31, which are, for example, substantially flat and parallel, and are limited by the initial edge 32 attached to the wall 9, which extends from the side surface 10 of the wall 9, with a cantilever edge 33 opposite to the initial edge 32 , and two opposite lateral edges 34, 34 '(lower and upper respectively), which connect the edges 32, 33. The edges 32, 33 can be essentially rectangular or curved and / or contain rounded edges; they can be essentially parallel to each other or not, etc. The edges 34, 34 'can also be essentially straight or curved, and / or contain rounded edges; they can be essentially parallel to each other or converging or diverging, etc.

The bottom edge 34 of each rib 25, when used, is affected by an ascending fluid (air) that rises in a direction parallel to the X axis (and axes A), while the rib 25 has a very efficient heat exchange just near the mentioned edge 34. Provided that the total surface of the ribs 25, in order to exchange efficiency, it is preferable to increase as far as possible the number of edges 34, while at the same time keeping the size of each rib 25 large enough for the air that envelops it and exchanges heat with it at a given speed growth to provide adequate heat removal.

For this purpose, the element 1 contains an appropriate number of ribs 25, which contain a surface sufficient to provide a large amount of heat transfer. Due to the aforementioned distance H, the minimum number of ribs 25 provided on the wall 9 (belonging to set 26) must be greater than H / 33, where H is expressed in millimeters.

In addition, if the number of ribs 25 is less than H / 15, then the total surface of these ribs 25 provided on the wall 9, expressed in square centimeters, should be greater than the number of ribs multiplied by 20.

If the number of ribs 25 is greater than H / 15, then the total surface of the mentioned ribs 25 provided on the wall 9, expressed in square centimeters, should be greater than the number of ribs multiplied by 10.

The surface of an individual rib 25 is calculated by summing the areas of two surfaces 31 02 and edges 33, 34 and 34 '.

In order to ensure the effectiveness of the individual rib 25, it is necessary that the air flow acts on the edge 34, and this requires the proper distance between the rib 25 and the next rib, possibly aligned with it: therefore, preferably, the grooves 28 have an axial length (along the axis A) more than 10 mm.

With an unchanged number of ribs and the surface of the ribs, it is desirable that they be located along the entire length H to ensure maximum heat transfer.

In the example shown in FIG. 1-2, the ribs 25 of the set 26 are located in two, three, four or more adjacent rows 27 of the ribs 25, separated by grooves 28, and each of these rows 27:

formed by at least four ribs 25, or rather, contains at least four edges 34; and has a total axial length (measured along the axis A and determined by the sum of the lengths of each individual rib 25 of the row), at least equal to the distance H times 0.2.

In various preferred embodiments, two rows of 27 ribs 25, separated by grooves 28, have a total axial length that is greater than or equal to the distance H times 0.3 or 0.4 or 0.5.

Preferably (but not necessarily), the ribs 25 are substantially perpendicular to the central plane P and / or substantially perpendicular to the side surface 10 of the wall 9 from which they extend.

The ribs 25 may have the same or different shapes and sizes; for example, they can all have the same length along axis A or have different lengths.

In addition, the grooves 28, which separate one rib 25 from the next rib 25, can have different shapes and sizes.

In the example shown in FIG. 1-2, the ribs 25 are located offset from each other in a direction transverse to the axes A, or rather, at least some ribs 25 are at least partially facing other ribs 25 parallel to them.

Preferably, the kit comprises three, four or more rows of 27 ribs located offset; each row contains ribs offset from the ribs 25 of the adjacent row or rows 27.

In the example shown in FIG. 1, 2, the ribs 25 extend straight from the side surface 10, and the grooves 28 have such a depth (measured in the direction perpendicular to the side surface 10) so as to reach the side surface 10; the initial edges 32 of the ribs 25 of each row 27 are directly attached to the side surface 10 and are separated from each other by grooves 28. Each groove 28 located between two adjacent ribs 25 of the row 27 extends from the cantilever edges 33 of said ribs 25 to the side surface 10 and is laterally limited edges 34, 34 of two adjacent ribs 25 facing each other.

In the embodiment shown in FIG. 3 (in which, for simplicity, only two adjacent rows 27 of ribs 25 are shown), the ribs 25 of each row 27 are connected to each other by a continuous portion 35 that extends along axis A and extends from side surface 10; the ribs 25 of each row 27 extend from the corresponding continuous portion 35, and the initial edges 32 of the ribs 25 are attached to the continuous portion 35. Each groove 28 located between two adjacent ribs 25 of the row 27 is laterally limited by two adjacent 34, 34 'edges ribs and extends from the cantilever edges 33 of the said ribs to the front edge 36 of the continuous section 35, which defines the groove 28 in the lower part.

The edge 36 of the continuous portion 35 may be substantially rectilinear or curvilinear and / or radially rounded to the sides 34 of the ribs 25 by means of curved sections and / or rounded edges.

In the embodiment shown in FIG. 4, in which parts that are similar or similar to the parts already described are denoted by the same reference numerals, the set 26 also contains adjacent rows 27 (at least two, and preferably three, four or more) ribs aligned along the corresponding axes A, essentially parallel, and separated by corresponding groups of grooves 28.

In this case, at least some of the ribs 25 (in the example shown, but not necessarily all ribs 25) are fully facing the corresponding adjacent ribs 25; in other words, at least some adjacent ribs 25 are substantially aligned relative to each other in a direction transverse to axes A, and therefore comprise lower edges 34 and upper edges 34 'substantially aligned in a direction transverse to axes A.

In the example shown in FIG. 4, kit 26 comprises four rows 27 of ribs 25, all substantially aligned with each other in a direction transverse to the axes A.

In any case, it is clear that some edges 25 of adjacent rows 27 may be unaligned. In general, the ribs 25 of adjacent rows 27 may comprise corresponding lower edges 34, and / or upper edges 34 'substantially aligned or not aligned in a direction transverse to the axes

- 3 021488

A. It is also understood that the ribs 25 of the rows 27 can be arranged in a different order than the one described and illustrated herein by way of example only. In particular, combinations of the circuits described with reference to the above described embodiments are possible. Optionally, but not necessarily, in order to further increase the efficiency of the element 1, the rear plate 7 and / or the front plate 6 may form other discontinuous rows of ribs; in this case, one or both plates 6, 7 are made as described above with reference to the ribs 25 of the rows 27. In particular, the rear plate 7 and / or the front plate 6 contain discontinuous side edges 11 containing the corresponding groups of slots that follow one after another along the lateral edges 11.

Finally, it is understood that further modifications and changes can be made to the radiator element described and illustrated herein without departing from the scope of the appended claims.

Claims (11)

CLAIM 1. An element (1) of a heating radiator comprising a main body (2) that extends essentially along the main axis (X) between two opposite axial ends having respective transverse couplings (5) and at least one set ( 26) the ribs (25) that protrude from the side wall (9) of the housing (2) are located on one side of the central plane (P) of the element (1), extend along the corresponding axes (A), essentially parallel to the main longitudinal axis ( X), and separated by grooves (28), characterized in that the minimum number eber (25) placed on the side wall (9) is greater than H / 33 where H is the distance between the couplings (5), expressed in millimeters; if the number of said ribs (25) placed on the side wall (9) is less than H / 15, then the total surface of said ribs (25) in square centimeters exceeds the number of ribs multiplied by 20 in square centimeters; and if the number of said ribs (25) placed on the side wall (9) is greater than H / 15, then the total surface of the mentioned ribs (25) in square centimeters exceeds the number of ribs multiplied by 10 in square centimeters. 2. The radiator element according to claim 1, characterized in that at least some adjacent ribs (25) are essentially aligned with each other in a direction transverse to the axes (A). 3. The radiator element according to claim 1 or 2, characterized in that each rib (25) is limited in the longitudinal direction by a lower edge (34) and an upper edge (34 '), axially opposite to each other, and at least in some adjacent ribs (25), the lower edges (34) are substantially aligned in a direction transverse to the axes (A). 4. A radiator element according to any one of the preceding paragraphs, characterized in that at least some adjacent ribs (25) are offset from each other in a direction transverse to the axes (A). 5. A radiator element according to any one of the preceding paragraphs, characterized in that at least some of the ribs (25) are at least partially facing the corresponding adjacent grooves (28). 6. A radiator element according to any one of the preceding paragraphs, characterized in that the ribs (25) are essentially straight and parallel to each other. 7. A radiator element according to any one of the preceding paragraphs, characterized in that the ribs (25) extend from the side surface (10) of the housing (2) and are substantially perpendicular to the side surface (10) from which they extend. 8. Radiator element according to any one of the preceding paragraphs, characterized in that at least some of the ribs (25) of the row (27) are connected to each other by a continuous section (35) that extends from the side surface (10) of the housing (2) and limits the grooves (28) at the bottom. 9. The radiator element according to any one of the preceding paragraphs, characterized in that it contains two, three, four or more adjacent rows (27) of fins (25). 10. A radiator element according to any one of the preceding paragraphs, characterized in that at least some of the ribs (25) are aligned along the corresponding axes (A) to form rows (27) of ribs; each row (27) contains at least four ribs (25), separated by three grooves (28); and the total axial length of the ribs (25) of each of the aforementioned rows (27), measured along the axis (A) and determined by the sum of the lengths of each individual ribs (25) of the row (27), is equal to at least the distance (H) between the couplings ( 5) times 0.2. 11. The radiator element according to claim 10, characterized in that two rows (27) of fins (25) separated by grooves (28) have a total axial length that is greater than or equal to the distance (N) between the couplings (5) times 0.3 or 0.4 or 0.5.