EP0676606B1 - Radiator - Google Patents

Abstract

The radiator has a number of radiator elements (10), each provided by a pair of profiled sheet stell half shells which are welded together to define a hollow space (3) with at least 3 channel zones (31, 31', 31"), for reception and circulation of the heating oil. All the outer edge zones (201, 202, 203) of each radiator element which can come into direct physical contact with a person during operation of the radiator, are free of the heating oil, the radiator elements having a width (B) which is double that of normal radiator elements. <IMAGE>

Description

The invention relates to a radiator according to the preamble of patent claim 1.

For many years z. B. movable on rollers, Socket connection-compatible room heating radiators with electrical Resistance heating device, especially heating rods or easily replaceable Cartridges as flexible heaters for transitional seasons, cold periods proven in the warmer season and as additional heating. Such radiators are e.g. B. from EP-A1-292 441 and EP-A1-114 158 known.

The use of electrical energy has a certain disadvantage high cost of such heaters and therefore there is a tendency in the direction that To increase the heating effect in an energy-saving manner by making the greatest possible difference between the surface temperature of the radiator fins in the area of their oil filling and the prevailing room temperature is sought.

From DE-A1-24 40 184 radiators are known in which a number of fluid-filled channels is arranged side by side. These channels are between the formed two plates or half-shells of a radiator member, the plates rest against each other between the formed channels and a weld seam around the Have heating fluid leading channels or welded together on the outer circumference are. In the peripheral region of that formed by the two plate-shaped elements A weld seam is formed to prevent the heating fluid from escaping from the member Radiator links prevented.

From FR-PS 1,394,844 a radiator is known which consists of a plurality of There are links in the middle of which an electric heating element is inserted. This out part of existing plate-shaped links have their height or Longitudinal extension a number of openings, which on the one hand improve the convection should and on the other hand the heat transfer from the central heating element to Limit the size of the slabs to the areas or bridges between the There are openings. In this way, the heat transfer from Radiator interior limited to the circumference of the radiator.

From EP-A1-556.433 a radiator of the type mentioned is known in where the individual links are formed by two half-shells welded together will. The weld seam with which the two plate-shaped half-shells are connected limits the area in which the heating fluid circulates. Subsequent to this The area in which the two half-shells forming the link lie against one another is a Provided area in which each of the half-shells at least two in its peripheral area Bends, possibly also a third and fourth bend. This Bends delimit a channel-shaped space that is intended to pass through Increasing convection to lower the temperature of the radiator surface. In these Bends can be formed openings to further heat transfer restrict because for the heat transfer from the interior of the radiator to the extent of Links only those that are available between the openings of existing bridges.

The outer wall formed by the bends in the radiator panels continues on the outside due to the chosen shape of the bends an essentially smooth Surface. The formation of such turns requires a considerable amount mechanical effort and special precautions to carry out the weld, which separates the fluid-filled space from the bends in the peripheral area of the limb separates. The channel-shaped space of this radiator enables air to be convected its interior or is intended to form a chimney in which the air at her Passage is heated from bottom to top. This channel is neither below nor above locked; the flange parts delimiting the channel-shaped space are in their outer end areas or in the outermost edge area of the respective radiator link not connected.

This and also the radiator according to the invention correspond to the tendency, for. B. at a room temperature of 25 ° C, a surface temperature of the hottest zones of the Radiator elements from e.g. B. 110 ° C, to achieve what a (according to EC standard currently specified) temperature difference of 85 ° C. Simultaneously with the Energy savings become good convection and thus a pleasant indoor climate reached. The aim of the invention is the number of radiator elements with the same heat output to be able to reduce what material savings bring, lower acquisition costs and the manipulability of the devices is advantageously improved. Furthermore, the optics and surface design of such devices can be improved without the Increase material consumption or manufacturing costs.

In particular, the invention has set itself the goal of simple, production-technically economical, and existing manufacturing processes only insignificantly changing manner such, working with increased temperature difference To create electric radiators with oil filling, their manipulability, resemblance and Safety of use is not reduced in comparison to devices of previous construction, whose outside temperature is reduced to an acceptable value, which is none gaping gaps between neighboring limbs shows and a stable structure owns.

According to the invention, these objectives are achieved with a radiator of the type mentioned at the beginning with the in the characterizing part of claim 1 characteristics listed achieved.

By banishing the heated heat transfer fluid from the Outer contour area of the welding edges of the radiator ribs and the "widened" Formation of the edges or edge zones and thus the increased surface of the not Oil-carrying parts for heat emission can be found on the inside of the oil-filled body be brought to a significantly higher temperature without the outer contour of the Device, so in the special case z. B. on or on the outside Welded seams on both sides and on the top of the radiator, an increased Temperature occurs or that an AT of 85 ° C is exceeded. It will be a stable one Structure of the limbs and a reduction in the amount of heat achieved by the Heat transfer fluid is transferred to the outer edge zones.

If the edge zones mentioned in claim 7 are kept free of heating oil, a relatively uniform and low contour temperature of the radiators will be achieved. Furthermore, in the corner or edge positions of the radiators, which are extreme with respect to physical contact, low temperatures which are particularly beneficial can be achieved despite increased heating fluid temperatures.

Preferred boundary zone-width ratios, for example for mobile 1000 to 3500 watt space heaters, are given in claim 8, wherein, expressed in absolute values, the edge widths for such appliances can have approximately the preferred minimum values.

A diffusion of heat transfer oil into the from the oil-filled rib bodies after outwardly protruding, "widened" marginal zones and thus a reduction in their effect avoids the inner bond zone with particular security.

Are virtually eliminated since with the usual operation of the mobile upright radiators contacts with its bottom substantially at the same time narrower configuration of the edge zone may be at the bottom running together of the inner and outer weld seam according to claim 9 may be provided, which is also the edge zone width is reduced there.

It should not go unmentioned at this point that with the arrangement of two Binding zones, d. H. an inner bond zone and an outer bond zone, at a distance from each other, in the sense of a sandwich effect, an essential stiffening and mechanical stabilization against external influences, e.g. B. by overturning the Radiators, most exposed to such effects and by which Widening of weakened edges is achieved.

The design of the edge zones brings about an advantageous stabilization of the Rib bodies in the area of their heat transfer openings have the advantage particularly widened and thus "cooler" edge zones in the area of the outer contour edges of the radiator, which were also mentioned above.

The formation or arrangement of a channel in the widened edge region causes on the one hand, a further reduction in the outer contour temperatures of the radiator in the Operating state, or enables higher at the same outer contour temperatures Oil temperatures and thus improved heating performance of the other radiator body zones and on the other hand, contributes to the mechanical strengthening of the widened edges of the ribs.

In each case the bottom of the radiator elements associated with the channel extensions of the individual ribs according to claim 11 there protect the lower edge zones of the radiator, which may foot contacts can be made with people. In addition, they also cause further mechanical stiffening.

An arrangement of the duct in the neighborhood is simpler in terms of production technology to the outer bond zone of the edges or edge zones of the radiator ribs.

Likewise in the sense of the highest possible temperature differences between the radiator and room temperature with the outer contours of the radiator kept at a low temperature, an opening for heat conduction inhibition in the widened edges or edge zones of the radiator members is provided according to claim 12. An arrangement of the openings mentioned is immediate Accompanying neighborhood to the inner binding zone of the widened edges in terms of heat, strength and production technology, or the location of the openings is particularly advantageous in terms of security.

A certain stiffening edge zone can also abandoning the openings, for example in the region of the upper side of the rib edges, bring according to claim. 13

Finally, it may be beneficial at both front sides of the radiator, that is on the outer sides of the first and last limiting radiator member respectively to arrange protective hoods according to claim fourteenth

In addition, it must be stated that in the previously known types of radiators, such a hood is provided on one side, in which, among other things, the temperature control and switching device, the connection for the heating cartridge, the power supply cable with plug and the like are accommodated. These functions can of course be assigned to one or both of the protective hoods according to claim 14 .

The invention is explained in more detail with the aid of the drawing, FIG general, partially expanded oblique view of a device according to the invention Explanation of its main components and features, Fig. 2 is a view particularly preferred embodiment of a link of the new radiator and FIG. 3 FIG. 2 shows a sectional view of the radiator element along a plane A-A ′ according to FIG. 2, and Fig. 4 shows a detailed solution.

The radiator 100 shown schematically in FIG. 1 is made of several, fluid-tight adjacently arranged links 10 with end links 10 ', 10 "formed, the interconnected interiors filled with a heat transfer fluid are, and by means of an electric heater 6 or the like penetrating virtually all the links. heatable. Using a bracket 501 attached to the underside of the radiator 100 Roller frame 5 is the same easily at its place of use, for. B. inside an apartment, movable. The individual rib bodies point to the full extent on this drawing surrounding them all around - one facing outwards, in comparison to radiators previous design, in particular significantly widened edge 2 with side Longitudinal edge zones 201 and 202 and upper and lower edge zones 203 and 204 on the due to their width essentially low, harmless temperature also at have highly heated heating oil in the interior of the radiator. This border 2 points at least on its outside as an outer bond zone, a closing weld seam, e.g. B. an electric roll weld 21 on. The two end members 10 'and 10 "are each on their front surfaces 205, 206 with the - also arranged on the remaining ribs 10 - Profiling embossments 24, 31, 32 with removable protective hoods 45, 45 'with Convection slots 451, 452 practically covered over the entire surface.

The cover 45 contains recesses 453 or attachments 454 or the like for the accommodation of control and switching elements, cables and the like.

The one shown in plan view in Fig. 2 and cut along A-A 'in Fig. 3 Radiator rib 10 is profiled from two symmetrical to a central plane Half-shells 110, 110 'with mutual bonding are formed over flat outer edges.

The rib 10 has an approximately rectangular outer contour with rounded Corner areas and has a peripheral edge 2 with lateral edge zones 201 and 202 with a respective width b and an upper and a lower edge zone 203, 204 with - here smaller widths - on. The total width of the radiator fin 10 itself is B designated. In the upper and lower area, the radiator link 10 has a circular shape Heat fluid through openings 35, 35 'with for fluid-tight connection to the Neighboring members provided concentric sealing press surfaces 351, 351 '. Outward the edge zones 201 to 204 or edge 2 is through the outer bond zone, in particular an outer weld seam 21, limited.

To the hollow rib body 3 containing the heat transfer oil is the Edge 2 through a second, which acts as an inner bond zone, a diffusion of the Heat oil in the edge 2 preventing inner weld 23 with in the upper area and in the lower area the openings 35 ', 35 are approximately concentrically surrounding Rounding areas 231 ', 231 are completed, which means that in the corner areas first "widening", then again "narrowing" peripheral zone corner areas 235 are formed are.

Adjacent to the outer weld seam is with and on both sides projections 221, 221 'which run upwards and inwards in the lower region having channel sections a total of an air-filled thermal conduction channel or Channel 22 arranged, the rib edge 2 from the outside as a thickening gives perceptible zone. Farther inwards is one through another Beads of the half-shells 110, 110 'formed, which are not accessible or cannot be reached by the heated oil arranged infusible "flat" zone 24, which heat-conducting inhibiting slots or Has openings 25 in the top and bottom of the radiator member in this Case are not provided.

The slots 25 are directly adjacent to the fluid-tight, inner weld seam 23 fitted to the outside, arranged to accompany it. Through two longitudinal beads 32 and 32 'the actual oil heater 3 is regulated in three favoring the oil circulation Longitudinal cavities 31, 31 ', 31 "divided, which, if necessary, as by interrupted Lines indicated up to converging in the openings 35, 35 'for the oil passage can be drawn in.

The detail of FIG. 4 shows an otherwise analogous reference number to the Top of the radiator member 10 within its widened edge zone 203 arranged row of heat-conducting inhibition openings 25.

Other structural advantageous embodiments that contribute to the goal of Lowering the outside temperature of the heating fins or members 10 are in claims 5, 6, 16 and 17.

In a procedure according to claim 5, the half shells are on their outer Edges stably connected and offer a visually perfect impression, in particular no gaping gaps.

According to claim 6 it is achieved that the radiator has an exact geometric Has appearance or that on both sides of the half-shells of the link 10 the same Temperature profiles or the same heat transfer is available.

If one proceeds according to claim 16, it is achieved that the first Heat transport is inhibited and only then due to a release of heat Enlarged convection takes place in the area of the heat conduction inhibiting channel 22.

If one proceeds according to claim 17, then this measure achieved that in the upper region of the radiator in the half-shells the heat channel 22nd can be done all around and uninterrupted or that even in this area is sufficient Space for the slots or openings 25 is provided.

The heat conduction inhibiting channel 22 is designed to be closed Avoid contamination of the same or dust deposits in this channel 22 or to achieve an easy to manufacture embodiment of this channel. The of the heat output achieved due to the at least one heat conduction inhibiting channel 22 the enlarged surface of the half-shells or the link 10 are sufficient to Outside temperature in the outer edge regions of the link 10 to an acceptable To decrease value.

A simple manufacture of the radiator is achieved if according to claim 4 action is taken; the formation of the heat conduction inhibitor 22 through each other symmetrically opposite bulges or deformations in the course of Production of the half-shells enables identical half-shells to form a link 10 Channels 22 and optionally slots 25 are assembled.

It is simple if, according to claim 18, the heat conduction inhibiting channels 22 directly on border the outer bond zone 21, because despite the formation of the heat conduction inhibition channels 22 a proper all-round closure of the links 10 to the outside is guaranteed. If no slots 25 are formed in link 10, it could this training zone 21 as an additional security lock against the exit of the Heating fluids can be thought of from the inner bond zone 21.

Claims (18)

1. A radiator with an electric heating mechanism and a filling comprising a heat transfer fluid, preferably heating oil,

   with a plurality of radiator members (10) each comprising two profile-pressed sheet-metal half-shells which are joined together and which each have at least one upper and one lower aperture (35, 35') allowing fluid through for the fluid throughput,

   which radiator members (10) each have at least one cavity (3) which is provided to accommodate and circulate the heat transfer fluid, may have at least three longitudinal channel zones (31, 31', 31"), and is surrounded or bounded by a continuous interior connecting zone (23) which fluid-impermeably connects the two half-shells of the respective radiator member (10) and surrounds or bounds the cavity (3) or any longitudinal channel zones (31, 31', 31") that may be present,

   at least a portion, preferably all, of the outward-facing boundary zones (2, 201, 202, 203) of the radiator members (10) which may come into direct contact with the person during the heating operation of the radiator (100) and are outside the cavity (3), in particular outside the outermost longitudinal channel zone (31, 31"), being kept free of heat transfer fluid and being designed with a greater width than radiator members or ribs of the method of construction used hitherto,

   characterised in that,
   to reduce heat transport in the boundary zones (2, 201, 202, 203) at least one channel (22), which is completely closed, air-filled or free from heating fluid, is formed between the interior connecting zone (23) and a continuous exterior connecting zone (21) close to the exterior contours of the two half-shells in the two longitudinal side boundary zones (201, 202) and/or in the upper side boundary zone (203).
2. A radiator as claimed in claim 1, characterised in that a plurality of, in particular, square or oblong vents or apertures (25) is formed between the interior connecting zone (23) and the exterior connecting zone (21) in the enlarged boundary zone (2, 201, 202, 203) of the individual members (10).
3. A radiator as claimed in claim 2, characterised in that the apertures (25) immediately adjoin the interior connecting zone (23) or are disposed in the region between the interior connecting zone (23) and the channel (22) and/or in the region between the channel (22) and the exterior connecting zone (21).
4. A radiator as claimed in one of claims 1 to 3, characterised in that the channel (22) is formed by mutually symmetrically opposite corrugations or convexities of the boundary zones (2, 201, 202, 203, 204).
5. A radiator as claimed in one of claims 1 to 4, characterised in that the exterior connecting zone (21) for the half-shells (32, 32') of a member (10, 10', 10") to be respectively joined is formed by a bead or a weld seam.
6. A radiator as claimed in one of claims 1 to 5, characterised in that the boundary zones (2, 201, 202, 203, 204) of two half-shells (32, 32') joined to form a radiator member (10) extend substantially parallel to one other and are designed to abut one another in the region between the interior connecting zone (23) and the exterior connecting zone (21), except in the region of the channel (22).
7. A radiator as claimed in one of claims 1 to 6, characterised in that the boundary zones (2, 201, 202, 203) of the individual members (10) have mutually identical widths (b) on all or at least two (201, 202), in particular three (201, 202, 203), sides provided therewith (201, 202, 203, 204), and/or in that the boundary zones (2, 201, 202, 203, 204) are each designed so as to enlarge further and narrow again in the corner regions (235, 235') of the radiator members (10, 10', 10").
8. A radiator as claimed in one of claims 1 to 7, characterised in that the ratio of boundary zone width (b) to the total width of the exterior contour of the members (B) is at least 1:9, preferably at least 1:6, and/or in that the width (b) of the boundary zone (2, 201, 202, 203, 204) of the individual radiator members (10, 10', 10") is at least 16 mm, in particular at least 20 mm.
9. A radiator as claimed in one of claims 1 to 8, characterised in that the interior connecting zone (23) and the exterior connecting zone (21) come to lie close alongside one another or are designed so as to merge with one another at least in part in the boundary zone (204) on the underside of the individual radiator members (10, 10', 10").
10. A radiator as claimed in one of claims 1 to 9, characterised in that the channel (22) has an approximately diagonally disposed square cross-section or a circular cross-section.
11. A radiator as claimed in one of claims 1 to 10, characterised in that, at the underside boundary zone (204) of the radiator members (10, 10', 10"), the channel (22) has channel extensions (221, 222) on both sides in each instance.
12. A radiator as claimed in one of claims 1 to 11, characterised in that the channel (22) is disposed so as to substantially immediately adjoin or abut the interior side of the exterior connecting zone (21).
13. A radiator as claimed in one of claims 2 to 12, characterised in that no apertures (25) are disposed in the region of the boundary zone (203) on the upper side of the radiator members (10, 10', 10") or only the uppermost region is free of apertures and the apertures extend into a region of the boundary zone which corresponds in its width to the width of the apertures.
14. A radiator as claimed in one of claims 1 to 13, characterised in that the two outermost members or ribs (10', 10") of the radiator (100) are provided with insulation covers (45, 45') which cover substantially the whole area of their outward-facing faces (205, 206), enable outside air convection to take place, and have air flow apertures, in particular air flow vents (451, 452).
15. A radiator as claimed in one of claims 1 to 14, characterised in that at least two, preferably more than two, channels (22) are designed so as to extend substantially parallel to one other between the interior connecting zone (23) and the exterior connecting zone (21).
16. A radiator as claimed in one of claims 2 to 15, characterised in that the apertures (25) are aligned in one or two row(s) substantially parallel to the boundary of the member (10).
17. A radiator as claimed in one of claims 1 to 16, characterised in that the distance between the upper heating fluid throughput opening (35') and the upper extremity of the radiator rib (10) is greater than the distance between the lower heating fluid throughput opening (35) and the lower extremity of the radiator rib (10).
18. A radiator as claimed in one of claims 1 to 17, characterised in that the channel (22) is outwardly surrounded by the exterior connecting zone (21).

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