IE42086B1

IE42086B1 - Space heating arrangements

Info

Publication number: IE42086B1
Application number: IE3035/75A
Authority: IE
Original assignee: Runtal Holding Co Sa
Priority date: 1974-09-20
Filing date: 1975-09-16
Publication date: 1980-06-04
Also published as: ATA840474A; CH568539A5; DK143370C; DK395775A; FR2285586B1; DK143370B; FR2285586A1; ES441107A1; DE2540202C2; DE2540202A1; BE833593A; IL48093A0; IT1042144B; NL7511063A; JPS5153752A; AT336221B; SE7509557L; GB1517984A; IL48093A

Abstract

1517984 Space heaters RUNTAL HOLDING CO SA 10 Sept 1975 [20 Sept 1974] 37297/75 Heading F4S [Also in Division B3] A space heater comprises a plurality of hollow-plate elements 1 of elongate flat-sided cross-section 2 closed at their ends, arranged parallel to each other and connected to tubular headers 2 for fluid flow therebetween by sleeve elements 3 which extend (as shown in Fig. 4) into the elements 1 (the fluid connection being made via slots 7 in the elements 3) and being welded thereto at 5, conical ends 4 of the sleeve elements projecting beyond the elements 1 into holes 6 in the headers 2 to which the elements 3 are joined by a resistance weld (not shown in the drawing). Banks of the elements 1 may be disposed respectively in parallel planes on each side of the headers (Fig. 3).

Description

This invention relates to space heating arrangements.

Space heating arrangements are known in which a plurality of parallel pipes are connected to header pipes for the flow and return of a heating fluid such as water. Such known arrangements always have their header pipes at the ends of the parallel pipes which all open into the two header pipes, for which reason the latter must be larger in cross-section than the parallel pipes. There also exist heating arrangements with rearwardly disposed header pipes and with oarallel flat oiDes which lie against each other. The cross-section of the header pipes is for example round or rectangular, and, because of the larqer dimensioning, must either project the towards both sides of the plane oyparallel pipes, with a symmetrical arrangement, or must project only towards one side, in the construction with the header pipes· disposed rearwardly, so that in the latter case each header pipe is flush with the parallel pipes at the front side of the heating arrangement. The arrangement of the header pipes, the structures of which may adopt any of many known variations, is subject to aesthetic considerations as well as to manufacturing considerations, in order to achieve attractive shaping together with economical production. However, the previously known heating arrangements with the thicker pipes at the two ends cannot be considered as satisfactory from either the aesthetic or the manufacturing cost point of view. Hitherto, only autogenous or COg welding has been considered for welding the parallel pipes into the header pipes. With pipes which lie closely adjacent to each other, it is difficult to make a neat , weld, and this operation can only be carried out by skilled craftsmen.

According to one aspect of the invention a space heating arrangement 'comprises header pipes for the feed and return of a heating fluid and a plurality of flat-sided pipes which are arranged parallel to one another with their axes perpendicular to the axes of the header pipes, wherein each flat-sided pipe is closed at its ends and has welded thereto a pair of sleeve-shaped members which extend into and through the interior of the flat-sided pipe and are spaced from the respective ends of the flat-sided pipe, ends of the sleeve-shaped members which project from one side of each flat-sided pipe are welded into apertures in the header pipes whereby the interiors of the sleeve-shaped members communicate with the interiors of the header pipes, and the sleeve-shaped members have have slots communicating between tiie interior and exterior of each sleeve-shaped member within the associated flat-sided pine whereby heating fluid can pass between the header pipes and the flat-sided pipes via the interiors of the sleeve-shaped members and the slots.

Because of the use of the sleeve-shaped members as connections between the header pipes and the flat-sided pipes, it is possible for manufacture to be effected by means of a so-called press-welding method in which the components to be joined together are brought together under pressure between the electrodes of a resistance welding machine, which substantially simplifies the manufacturing operation and does not require skilled labour.

The header pipes are preferably each of circular cross-section, because a round pipe has a greater strength than a flat-sided pipe in withstanding the pressure of the welding machine of which one electrode in the form of a half-cylinder is pressed against the periphery of the header pipe, while the pressure of the other electrode is carried by the sleeve-shaped member which extends right across the interior of the flat-sided pipe, so that the relatively weak flat-sided pipe is not deformed. A further reason for the preferred choice of cylindrical header pipes is the possibility of dividing the heating arrangement into sectors for feed and return, if a plurality of space heating arrangements are to be connected in series and for example the upper half of each heating arrangement is used for the feed and the lower half is used for the return, which division can be most advantageously carried out with cylindrical header pipes. Partition walls which can be fitted into the header pipes for effecting the above-mentioned division can be most advantageously inserted .in cylindrical header pipes and also ensure absolute leak-proofing, which was never reliably the case with known heating arrangements with header pipes of non-round cross-section, for which reason the arrangement of a plurality of heating arrangements in series was hitherto only possible within narrow limits, due to the pressure losses caused by leaks, with the effect that the last heating arrangements are cold. If, as is usual in many places, the consumption of hot water in litres is used as a basis for calculating heating costs, the series arrangement of heating arrangements is the most desirable arrangement, for the purpose of achieving a high temperature gradient with a small volume of circulated water, and its operational reliability is therefore very important.

According to a second aspect of the invention, there is provided a method of manufacturing the heating arrangement defined above wherein the sleeve-shaped members are'fitted into holes in the one side of each of the flatsided pipes and are sealingly welded to the flat-sided pipes at the edges of the holes, said ends of the sleeve-shaped members, which are each constructed with a conical centering portion, are fitted into the apertures in the header pipes, and each si eeve-t shaped member is fixedly connected to a header pipe by welding by means of a resistance welding machine, one electrode of the machine being positioned against the side of the header pipe remote from the flat-sided pipe and another electrode of the machine being positioned against the side of the flat-sided pipe remote from the header pipe and the two electrodes being urged together during welding to press each of the flat-sided pipes and header pipes together during welding.

By way of example, embodiments of the invention will now be described in detail with reference to the accompanying drawings in which; Figure 1 is a front view of a space heating arrangement; Figure 2 is a side view of a space heating arrangement with flat-sided pipes arranged on one side of the header pipes; Figure 3 is a side view of a space heating arrangement with flat-sided pipes arranged on both sides of the header pipes; and Figure 4 is a cross-sectional view on an enlarged scale of part of a header pipe with a flat-sided pipe connected thereto.

The space heating arrangement shown in Figure 1 comprises five flat-sided heating pipes 1, which are arranged parallel to each other, and two header pipes 2, spaced inwardly of the ends of the flat-sided pipes and rearwardly of a common plane through the flat-sided pipes. This arrangement has the aesthetic advantage that the header pipes 2 are not or are hardly visible from the front, in contrast to most known heating arrangements of similar type in which the header Dipes form thickened portions projecting forwardly or towards the sides, this being the case if the parallel heating pipes are welded into the header pipes which are disposed at the ends of the heating pipes and which are of larger cross-section than the heating pipes.

In the case of the heating arrangements shown in Figures 1 to 4, connection between the flat-sided pipes 1 and the header pipes 2 is made by an advantageous process which can be called a combination of COg welding and press-welding. This production process can only be carried out on header pipes which are displaced inwardly from the ends of the heating pipes. First of all, holes are made in each flat-sided pipe 1, each at a predetermined spacing from an end thereof and then a sleeve-shaped member 3 is fitted into each such hole so that the member lies against the inside wall of the flat-sided pipe opposite the hole.

The member 3 projects outwardly through the hole, and a conical centering portion 4 is turned on the projecting end of the member. The member 3 is welded into the flat-sided pipe 1 by means of COg welding along a weld seam 5 around its periphery. The conical centering portion 4 of the member 3 is then caused to project into a hole 6 in the header pipe 2, and the header pipe 2 and the member 3 are then joined together by press-welding. To do this, an electrode (not shown) of a resistance welding machine, which is in the form of a half-cylinder, is pressed against the header pipe 2, and a flat electrode of the welding machine (not shown), which is opposite the first-mentioned electrode, is pressed against the flat sided pipe 1 from the outside so that the member 3 transmits the pressure to the header pipe 2 which has a greater strength than the flat-sided pipe 1.

Two members 3 are welded into each flat-sided pipe 1, and the flatsided pipe is thereby connected to the two header pipes 2 for the flow and return. On a portion which is disposed within a flat-sided pipe 1, each member 3 has radially extending slots 7, for the passage of water between the flat-sided pipe and the header pipe 2 via the interior of the member 3. Each header pipe 2 is of circular cross-section which most advantageously permits a radially-extending partition wall 8 to be pressed in from the end of the pipe to reliably seal the halves of the pipe from one another, if the heating arrangement is to be divided into separate upper and lower halves for the series connection of a plurality of heating arrangements as described in more detail hereinbefore. The partition walls 8 are inserted before the members 3 are welded into place. Figures 2 and 3 show that the flat-sided pipes 1 can be arranged on one side of the header pipes 2, or on opposite sides of the header pipes 2 in parallel planes, the flat-sided pipes 1 being connected to the header pipes 2 in each case, as set forth above, by means of the members 3 and the pressI welding method described above, which permits rational and thus economical production. Figure 1 also shows that the flat-sided pipes 1 are arranged parallel to each other and are spaced from each other, so that, in contrast to known heating arrangements with flat-sided pipes which touch each other the present space heating arrangement provides a higher heating output which is achieved by virtue of the circulation of air between the flat-sided pipes and by virtue of the free heating surfaces which are larger since the heating pipes do not lie against each other.

The heating arrangements disclosed hereinabove can be manufactured simply and quickly. The welded connections are of high quality and can be effected by unskilled labour.

By virtue of the construction of the space heating arrangements, which are generally wall-mounted, the header pipes are not readily visible from the front.

Claims

1. A space heating arrangement comprising header pipes for the flow and return of a heating fluid and a plurality of flat-sided pipes which are arranged parallel to one another with their axes perpendicular to 5 the axes of the header pipes, wherein each flat sided pipe is closed at its ends and has welded thereto a pair of sleeve-shaped members 'which extend into and through the interior of the flat-sided pipe and are spaced from the respective ends of the flat-sided pipe, ends of the sleeve-shaped members which project from one side of each flat-sided io pipe are welded into apertures in the header pipes whereby the interiors of the sleeve-shaped members communicate with the interiors of the header pipes, and the sleeve-shaped members have slots communicating between the interior and exterior of each sleeve-shaped member within the associated flat-sided pipe whereby heating fluid can pass between the header pipes and the flat-sided 15 pipes via the interiors of the sleeve-shaped members and the slots.

2. A space heating arrangement according to claim 1, wherein at least some of the flat-sided pipes are spaced from each other.

3. A space heating arrangement according to claim 1 or claim 2, wherein the header pipes are each of circular cross-section. 20

4. A space heating arrangement according to claim 1, claim 2 or claim 3, wherein the flat-sided pipes are arranged on one side of the header pipes in a common plane.

5. A space heating arrangement according to claim 1, claim 2 or claim 3, wherein the flat-sided pipes are arranged on opposite sides of the header 25 pipes in planes which are parallel to each other.

6. , A method of manufacturing a space heating arrangement according to claim 1, wherein the sleeve-shaped members are fitted into holes in the one side of each of the flat-sided pipes and are sealingly welded to the flat-sided pipes at the edges of the holes, said ends of the sleeve-shaped members, which are 30 each constructed with a conical centering portion, are fitted into the apertures in the header pipes, and each sleeve-shaped member is fixedly connected to a header pipe by welding by means of a resistance welding machine, one electrode of the machine being positioned against the side of the header pipe remote from the flat-sided pipe and another electrode of the machine being positioned against the side of the flat-sided pipe 5 remote from the header pipe, and the two electrodes being urged together during welding to-press eachof the flat-sided pipes and header pipes together during welding.

7. A space heating arrangement substantially as herein described with reference to Figures 1, 2 and 4 of the accompanying drawing. 10

8. A space heating arrangement substantially as herein described with reference to Figures 1, 3 and 4 of the accompanying drawings.

9. A method of manufacturing a space heating arrangement, the method being substantially as herein described with reference to the accompanying drawings.