CA1048491A - Multi-element type radiator of plastic material - Google Patents
Multi-element type radiator of plastic materialInfo
- Publication number
- CA1048491A CA1048491A CA75228694A CA228694A CA1048491A CA 1048491 A CA1048491 A CA 1048491A CA 75228694 A CA75228694 A CA 75228694A CA 228694 A CA228694 A CA 228694A CA 1048491 A CA1048491 A CA 1048491A
- Authority
- CA
- Canada
- Prior art keywords
- radiator
- tube sections
- water pipes
- pipes
- plastic material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000003292 diminished effect Effects 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 238000000071 blow moulding Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
- F28F21/063—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits for domestic or space-heating systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A radiator element and radiators made of a plurality of these elements are provided. Each element is of synthetic plastic material and includes a cylindrical top section in-terconnected with a cylindrical bottom section by water pipes.
The top and bottom sections are connected with similar sections of other elements to form a radiator and the water pipes enter these sections radially through portions of reduced diameter.
A radiator element and radiators made of a plurality of these elements are provided. Each element is of synthetic plastic material and includes a cylindrical top section in-terconnected with a cylindrical bottom section by water pipes.
The top and bottom sections are connected with similar sections of other elements to form a radiator and the water pipes enter these sections radially through portions of reduced diameter.
Description
1l)4849~
This invention relates to an improvement in multi-element type radiators made from synthetic plastic material.
Multi-element type radiators have-vertical water channels and upper and lower collecting channels composed of shell-shaped headpieces. The hubs of adjacent headpieces are connected with each other by screwed in nipples or by welding.
With multi-element radiators of steel or cast iron the verti-cal water channels may have any desired cross section since the said materials have a sufficient rigidity to ensure that 10 the channels are not deformed even with an unfavorable shape of the cross section. In the case of radiators of synthetic plastic material the vertical water pipes should have a cross section such that in spite of the relatively low stability of this material, deformation is held within acceptable limits.
It has, therefore, been proposed to use water pipes with cir-cular cross section as such a geometrical shape ensures the highest possible resistance to internal pressure (cf. German Patent 2,140,486 and German Utility Model 6,601,479).
Another weak point of multi-element radiators lies in the region of the headpieces. With the known shell-like shape of the headpieces a so-called accordeon effect is ob-served if the stability of the material is too low, i.e. the multi-element radiator expands in axial directions of the col-lecting channels. With radiators of steel this expansion is hindered by longitudinal tie rods which are secured by welding with the hubs of the terminal elements.
An expansion in axial direction can also be avoided by connecting both hubs of a headpiece by welded-in rods or to provide the headpieces with axial recesses the bases of 1~4~491 which are then welded together. But this means considerable expenditure of work and with radiator elements of synthetic plastic material such a manufacturing method is difficult to carry out. Moreover, the expansion is not always sufficiently limited. The shell-like regions besides the rods or recesses are still subject to heavy deformations.
It is the object of the present invention to confer upon the headpieces of radiator elements of synthetic plastic material a shape!such than an expansion in axial direction is hindered. Additional stiffening elements are not normally necessary but may be applied, if desired.
Accordingly, the invention provides a radiator ele-ment of synthetic plastic material and comprising: a cylindri-cal top tube section; a cylindrical bottom tube section having its axis parallel with that of the top tube section; and a plurality of water pipes extending generally vertically between said tube sections with their axes in a plane perpendicular to the axes of said tube sections, each of the water pipes be-ing connected at its respective ends with the top and bottom tube sections such that each of the water pipes is radial where it meets the cylindrical tube sections.
The invention will now be described in further de-tail and by way of a preferred embodiment with reference to the accompanying drawing in which;
Figure 1 is a partially sectionedfront elevation of a portion of a radiator made up of radiator elements according to the invention; and Figure 2 is a front view of one of the radiator ele-ments and including compound section line I-I on which 1~48491 Fig. 1 is partly sectioned.
Figure 1 shows a part of a radiator made up of a plurality of radiator elements such as that seen in Figure 2.
This radiator element includes respective upper and lower tube sections 1, 1' having parallel axes and interconnected by six generally vertical water pipes 2a, 2b, 2c, 2d, 2e and 2f.
The pipes are spaced symmetrically about an axis containing vertical diameters of the tubes 1, 1' and have their axes in a plane perpendicular to the axes of the pipe sections. The tubes 2a ans 2f, 2b and 2e, and 2c and 2d are respective mirror images of one another about the vertical axis between the tube sections. As seen in Figure 2, the end portions of the generally vertical tubes are cranked or bent so that they engage the tubes 1, 1' radially.
The tube sections 1 and 1' are reinforced by respec-tive rings 3, 3' to strengthen the element and the assembled radiator.
The radiator element shown in Figure 2 is assembled with other elements by interconnecting the elements at tubes 1, 1' as seen in Figure 1. Also ends of the radiator are closed by caps such as cap 4 where no connection is to be made and other ends have the necessary connectors (not shown).
The vertical water pipes are reinforced by continuous compressed seams, formedduring blow molding, and local stif-fening webs 5 are formed by punching out sections of the com-pressed seams. Similarly, knobs 6 are formed on the pipes to engage similar knobs on other elements to rigidify the radiator structure on assembly.
The radiator elements can be producted from any suit-161 4~491 able synthetic plastic material by blow molding.
The mechanical stability of the tube sections is in-creased by the use of stiffening rings 3 in the form of half shells which are inserted in the blow mold cavity and then welded with the tube sections after blow molding. On assembly, the individual radiator elements are welded together at the end-faces of the tube sections 1, 1' to thereby create cylin-drical collecting channels which are not constricted internally at the joints and which are sufficiently strong to resist all anticipated internal pressures in radial directions.
The vertical water pipes do not end in shell-like headpieces but directly in the cylindrical tube sections, with the water pipes entering the tube sections radially. To this effect the upper portions of the vertical water pipes are more or less curved, (See Figure 2), depending on their respective positions. Such a construction is impossible with steel plate, whereas with a radiator of synthetic plastic material the en-tire element, i.e. the cylindrical tube section with the ver-tical water pipes can be produced in one working step, for example by blow molding.
By connecting the end-faces of the cylindrical tube sections of adjacent radiator elements, cylindrical collecting channels are formed the surface of which is parallel to the channel axis and, therfore, accordean-like expansion is kept to a minimum. Because of the cylindrical shape of the tube section the collecting channels have an optimum resistance to internal pressure.
In order to avoid weak points in the upper and lower portions of the water pipes where they run into the tube sec-~¢)48491 tion it is advantageous to diminish the diameter of the pipestowards the junction with the tube sections. By this reduction in the cross section, hoop stresses in the pipes are reduced and the radiator element is effectively further stiffened in the region of the headpieces without thickening the pipe walls.
~ The individual water pipes may be further stiffened by connecting them by means of continuous or intermittent webs.
In the blow molding process there is generally pro-duced first a radiator eleme~t the vertical water pipes of which are connected with each other by continuous webs. These webs are formed when the pipes are produced by compressing the extruded tube in the blow mold. If desired, the webs can be punched out in the blow mold or in a later process. For rea-sons of stability it is preferred to leave the webs at least partially.
This invention relates to an improvement in multi-element type radiators made from synthetic plastic material.
Multi-element type radiators have-vertical water channels and upper and lower collecting channels composed of shell-shaped headpieces. The hubs of adjacent headpieces are connected with each other by screwed in nipples or by welding.
With multi-element radiators of steel or cast iron the verti-cal water channels may have any desired cross section since the said materials have a sufficient rigidity to ensure that 10 the channels are not deformed even with an unfavorable shape of the cross section. In the case of radiators of synthetic plastic material the vertical water pipes should have a cross section such that in spite of the relatively low stability of this material, deformation is held within acceptable limits.
It has, therefore, been proposed to use water pipes with cir-cular cross section as such a geometrical shape ensures the highest possible resistance to internal pressure (cf. German Patent 2,140,486 and German Utility Model 6,601,479).
Another weak point of multi-element radiators lies in the region of the headpieces. With the known shell-like shape of the headpieces a so-called accordeon effect is ob-served if the stability of the material is too low, i.e. the multi-element radiator expands in axial directions of the col-lecting channels. With radiators of steel this expansion is hindered by longitudinal tie rods which are secured by welding with the hubs of the terminal elements.
An expansion in axial direction can also be avoided by connecting both hubs of a headpiece by welded-in rods or to provide the headpieces with axial recesses the bases of 1~4~491 which are then welded together. But this means considerable expenditure of work and with radiator elements of synthetic plastic material such a manufacturing method is difficult to carry out. Moreover, the expansion is not always sufficiently limited. The shell-like regions besides the rods or recesses are still subject to heavy deformations.
It is the object of the present invention to confer upon the headpieces of radiator elements of synthetic plastic material a shape!such than an expansion in axial direction is hindered. Additional stiffening elements are not normally necessary but may be applied, if desired.
Accordingly, the invention provides a radiator ele-ment of synthetic plastic material and comprising: a cylindri-cal top tube section; a cylindrical bottom tube section having its axis parallel with that of the top tube section; and a plurality of water pipes extending generally vertically between said tube sections with their axes in a plane perpendicular to the axes of said tube sections, each of the water pipes be-ing connected at its respective ends with the top and bottom tube sections such that each of the water pipes is radial where it meets the cylindrical tube sections.
The invention will now be described in further de-tail and by way of a preferred embodiment with reference to the accompanying drawing in which;
Figure 1 is a partially sectionedfront elevation of a portion of a radiator made up of radiator elements according to the invention; and Figure 2 is a front view of one of the radiator ele-ments and including compound section line I-I on which 1~48491 Fig. 1 is partly sectioned.
Figure 1 shows a part of a radiator made up of a plurality of radiator elements such as that seen in Figure 2.
This radiator element includes respective upper and lower tube sections 1, 1' having parallel axes and interconnected by six generally vertical water pipes 2a, 2b, 2c, 2d, 2e and 2f.
The pipes are spaced symmetrically about an axis containing vertical diameters of the tubes 1, 1' and have their axes in a plane perpendicular to the axes of the pipe sections. The tubes 2a ans 2f, 2b and 2e, and 2c and 2d are respective mirror images of one another about the vertical axis between the tube sections. As seen in Figure 2, the end portions of the generally vertical tubes are cranked or bent so that they engage the tubes 1, 1' radially.
The tube sections 1 and 1' are reinforced by respec-tive rings 3, 3' to strengthen the element and the assembled radiator.
The radiator element shown in Figure 2 is assembled with other elements by interconnecting the elements at tubes 1, 1' as seen in Figure 1. Also ends of the radiator are closed by caps such as cap 4 where no connection is to be made and other ends have the necessary connectors (not shown).
The vertical water pipes are reinforced by continuous compressed seams, formedduring blow molding, and local stif-fening webs 5 are formed by punching out sections of the com-pressed seams. Similarly, knobs 6 are formed on the pipes to engage similar knobs on other elements to rigidify the radiator structure on assembly.
The radiator elements can be producted from any suit-161 4~491 able synthetic plastic material by blow molding.
The mechanical stability of the tube sections is in-creased by the use of stiffening rings 3 in the form of half shells which are inserted in the blow mold cavity and then welded with the tube sections after blow molding. On assembly, the individual radiator elements are welded together at the end-faces of the tube sections 1, 1' to thereby create cylin-drical collecting channels which are not constricted internally at the joints and which are sufficiently strong to resist all anticipated internal pressures in radial directions.
The vertical water pipes do not end in shell-like headpieces but directly in the cylindrical tube sections, with the water pipes entering the tube sections radially. To this effect the upper portions of the vertical water pipes are more or less curved, (See Figure 2), depending on their respective positions. Such a construction is impossible with steel plate, whereas with a radiator of synthetic plastic material the en-tire element, i.e. the cylindrical tube section with the ver-tical water pipes can be produced in one working step, for example by blow molding.
By connecting the end-faces of the cylindrical tube sections of adjacent radiator elements, cylindrical collecting channels are formed the surface of which is parallel to the channel axis and, therfore, accordean-like expansion is kept to a minimum. Because of the cylindrical shape of the tube section the collecting channels have an optimum resistance to internal pressure.
In order to avoid weak points in the upper and lower portions of the water pipes where they run into the tube sec-~¢)48491 tion it is advantageous to diminish the diameter of the pipestowards the junction with the tube sections. By this reduction in the cross section, hoop stresses in the pipes are reduced and the radiator element is effectively further stiffened in the region of the headpieces without thickening the pipe walls.
~ The individual water pipes may be further stiffened by connecting them by means of continuous or intermittent webs.
In the blow molding process there is generally pro-duced first a radiator eleme~t the vertical water pipes of which are connected with each other by continuous webs. These webs are formed when the pipes are produced by compressing the extruded tube in the blow mold. If desired, the webs can be punched out in the blow mold or in a later process. For rea-sons of stability it is preferred to leave the webs at least partially.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A multi-element radiator made of plastic material and comprising vertical water pipes connected to upper and lower collecting channels, each radiator element being composed of a plurality of said vertical pipes connected at their upper and lower ends to relatively thin-walled cylindrical tube sections of substantially uniform diameter and the end-faces of adjacent tube sections being connected to form horizontal tubular channels of substantially uniform diameter along the length thereof, the ends of said pipes being of diminished cross-section at their junctions with said tube sections and being aligned with a radius of said tube sections.
2. A multi-element radiator as claimed in claim 1, wherein the tube sections are reinforced by strengthening rings.
3. A multi-element radiator as claimed in claim 1, wherein the vertical water pipes of one radiator element and the vertical water pipes of adjacent radiator elements are strengthened by reinforcing members interconnecting said pipes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742427715 DE2427715C3 (en) | 1974-06-08 | Sectional radiators made from joined, single-piece components |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1048491A true CA1048491A (en) | 1979-02-13 |
Family
ID=5917637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA75228694A Expired CA1048491A (en) | 1974-06-08 | 1975-06-06 | Multi-element type radiator of plastic material |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS517554A (en) |
| AT (1) | AT342249B (en) |
| BE (1) | BE830018A (en) |
| CA (1) | CA1048491A (en) |
| CH (1) | CH589268A5 (en) |
| DD (1) | DD118712A5 (en) |
| DK (1) | DK255975A (en) |
| FI (1) | FI751674A7 (en) |
| FR (1) | FR2274011A1 (en) |
| GB (1) | GB1500609A (en) |
| IT (1) | IT1038767B (en) |
| NL (1) | NL7506551A (en) |
| NO (1) | NO140149C (en) |
| PL (1) | PL104930B1 (en) |
| SE (1) | SE7506500L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2911893C2 (en) * | 1979-03-27 | 1984-09-27 | WSW Planungsgesellschaft mbH, 4355 Waltrop | Device for cooling air, in particular for cooling dusty weather in underground mining |
| IT1305868B1 (en) * | 1998-12-15 | 2001-05-21 | Ocean Spa | CONDENSER FOR A REFRIGERATOR, A FREEZER, THEIR SIMILAR COMBINATIONS |
| GB0815027D0 (en) * | 2008-08-16 | 2008-09-24 | Benham Paul | Property enhanced polymer radiator |
| CN102313458B (en) * | 2011-02-28 | 2013-02-06 | 吴志祥 | Heat radiator for hydrophily heating and manufacturing method thereof |
-
1975
- 1975-06-03 NL NL7506551A patent/NL7506551A/en not_active Application Discontinuation
- 1975-06-04 CH CH720375A patent/CH589268A5/xx not_active IP Right Cessation
- 1975-06-05 FI FI751674A patent/FI751674A7/fi not_active Application Discontinuation
- 1975-06-06 JP JP50067718A patent/JPS517554A/ja active Pending
- 1975-06-06 SE SE7506500A patent/SE7506500L/en unknown
- 1975-06-06 AT AT431775A patent/AT342249B/en not_active IP Right Cessation
- 1975-06-06 GB GB24448/75A patent/GB1500609A/en not_active Expired
- 1975-06-06 NO NO752011A patent/NO140149C/en unknown
- 1975-06-06 DD DD186496A patent/DD118712A5/xx unknown
- 1975-06-06 DK DK255975A patent/DK255975A/en unknown
- 1975-06-06 PL PL1975181021A patent/PL104930B1/en unknown
- 1975-06-06 IT IT24115/75A patent/IT1038767B/en active
- 1975-06-06 CA CA75228694A patent/CA1048491A/en not_active Expired
- 1975-06-09 BE BE157150A patent/BE830018A/en unknown
- 1975-06-09 FR FR7517887A patent/FR2274011A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2427715A1 (en) | 1975-12-18 |
| CH589268A5 (en) | 1977-06-30 |
| PL104930B1 (en) | 1979-09-29 |
| ATA431775A (en) | 1977-07-15 |
| JPS517554A (en) | 1976-01-21 |
| FR2274011B1 (en) | 1978-12-08 |
| DD118712A5 (en) | 1976-03-12 |
| NO752011L (en) | 1975-12-09 |
| DK255975A (en) | 1975-12-09 |
| IT1038767B (en) | 1979-11-30 |
| FI751674A7 (en) | 1975-12-09 |
| GB1500609A (en) | 1978-02-08 |
| SE7506500L (en) | 1975-12-09 |
| BE830018A (en) | 1975-12-09 |
| DE2427715B2 (en) | 1977-06-08 |
| NO140149C (en) | 1979-07-11 |
| FR2274011A1 (en) | 1976-01-02 |
| AT342249B (en) | 1978-03-28 |
| AU8190275A (en) | 1976-12-09 |
| NO140149B (en) | 1979-04-02 |
| NL7506551A (en) | 1975-12-10 |
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