CA1130273A - Plate heat exchanger - Google Patents
Plate heat exchangerInfo
- Publication number
- CA1130273A CA1130273A CA338,695A CA338695A CA1130273A CA 1130273 A CA1130273 A CA 1130273A CA 338695 A CA338695 A CA 338695A CA 1130273 A CA1130273 A CA 1130273A
- Authority
- CA
- Canada
- Prior art keywords
- bulgings
- plate
- plates
- heat exchanger
- heat exchange
- 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
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A B S T R A C T
The invention relates to aplate heat exchanger, which com-prises a plurality of plates (1) arranged to the side of each other, each plate consisting of two metal sheets (2,3), which are welded one to the other along two parallel edges and have longitudinal bulgings in parallel with said edges. The inven-tion has the object to produce a plate heat exchanger where the medium flowing within the plate is guided in a direction in parallel with the extension of the bulgings and back in the same direction. Each plate (1) is formed with a turning zone in that the bulgings in pairs meet in such a manner, that in the sheet plane two outermost bulgings meet along a semicircle line, thereafter the two bulgings next to the outermost ones, a.s.o., and the number of bulgings is an integer number.
Fig. 1
The invention relates to aplate heat exchanger, which com-prises a plurality of plates (1) arranged to the side of each other, each plate consisting of two metal sheets (2,3), which are welded one to the other along two parallel edges and have longitudinal bulgings in parallel with said edges. The inven-tion has the object to produce a plate heat exchanger where the medium flowing within the plate is guided in a direction in parallel with the extension of the bulgings and back in the same direction. Each plate (1) is formed with a turning zone in that the bulgings in pairs meet in such a manner, that in the sheet plane two outermost bulgings meet along a semicircle line, thereafter the two bulgings next to the outermost ones, a.s.o., and the number of bulgings is an integer number.
Fig. 1
Description
3~3~;~7;~
,~y --1--_late Heat Exchanger This invention relates to a plate heat exchanger, which comprises a plurality of plates arranged to the side of each other and each consisting of two metal sheets, which are welded 5 one to the other along two parallel edges cmd have longitudinal bulgings in parallel with said edges. The present invention has the object to produce a plate heat exchanger where the medium flowing within the plate is guided in a direction in parallel with the extension of the bulgings and back in the same direction.
10 This arrangement implies the further gain that substantially all surfaces of the plates flown through by a medium participate in the heat exchange. This is not the case, for example, when at one end of the plate a box is used for turning the medium flowing through the plates.
In general terms, the present invention provides a plate heat exchanger comprising a plurality of plates, which are ar-ranged to the side of each other and each of which consists of two metal sheets, which are welded one to the other along two parallel ed~es and are corrugated forming longitudinal bulgings 20 in parallel with said edges, whereby longitudinal passages are formed in the plates/ characterized in that each plate at one end is formed with a turning zone in that the bulgings in pairs meet in such a manner, that in the sheet plane two outermost bulgings meet along a semicircle line, thereafter the two bulgings next 25 to the outermost ones, a.s.o., and the number of hulgings is an integer number, whereby the one half of the number of passages of each of the parallel plates are connected to a common maniEold and the second half of the number of passages are connected to a common collecting main. The bulgings connected in pairs are 30 either symmetrical in cross-sectional shape and reversed one relative to the other.
~3~73 -la-An embodiment of the invention is described in the fol-lowing,with reference to the accompanying drawings, in which Fig. 1 is a perspecti~e view seen obliquely from below of four plates with associated intakes, the casing about the heat exchanger being omitted, Fig. 2 is a lateral view on an enlarged scale of the plates seen against the edge joints of the plates, Fig. 3 is a section along the line III~-III in Fig. 2 and, thus, a horizontal view of a metal sheet comprised in a plate.
Fig. 1 thus, shows in a perspective way four plates, which are arranged to the side of each other and provided with an in-take. The plates 1 at the embodiment shown are four in number and assembled of two metal sheets 2 and 3 so as to Eorm a hollow flow body, see Fig. 2. Each plate has four passages ~, 5, 6 and 15 7. At the upper end of the plates a turning zone is formed so that the passage ~ turns into the passage 7, and the passage 5 turns into the passage 6. The design of the passages will be-come apparent in greatex detail from the following. At the lower edge of the plates a distribution connecting piece 8 is ~ - 2 ~3~27~
attached, wi hin which a partition sheet 9 is located to s~pa-rate the passages 4 and 5 from the passages 6 and 7. A medium is hereby caused to flow into the plates according to arrow 10 and out of the plates according to arrow 11. In Fig. 1 the dist-ribution connecting piece 8 is shown on an enlarged scale rela-tive to the plates in order to simplify the illustration. The length of the plates 1, of course, can be varied entirely as desired in respect of the size of the heat surfaces. The second medium participating in the heat exchange flows between the plates 1, for example according to arrow 12. The flow path may also be from above according to arrow 13 and thereafter ou~ward at the arrows 14 and 15. ~ casing of sheet metal`is then placed about the`plate package with an inlet provided a~ the upper edge and one or several outlets provided close to the areas marked 1S by the arrows 14 and 15.
Figs 2 and 3 illustrate the structure of the plates and of the metal sheets constituting the same. Fig. 3 is a section a-long the line III-III in Fig. 2 and, thus, may be said to illu-strate a metal sheet 3 seen ~rom the inside. The metal sheet has longltudi~al bulgings 16, 17, 18 and 19, which may consist o valleys o symm~tric shape, ~or example a portion of an arc.
~n Figs 2 and 3 a special shape is shown where the valle~s have a cross-~ectional shape resembling half a pear, see the dashed lines 20. This shape, thuA, is asymmetrlc relative to a central line in the valley. In order to render it possible, for example, for the passages 16 and 19 to meet in the turning zone, i.e.
at the upper end of the plates, the asymmetric shape for the passages 16 and 19 must be identical but reversed, as also appears from Fig. 3.
The cross-sectional shape of the valley 17 is equal but re-versed to that o the valley 16, and the cross-sectional shape or the valley 18 is reversed relative to the cross-sectional shape ~or the valley 17. A cross-section along the line II-II
in Fig. 3 thereby yields the dashed lines in the upper part o~
Fig. 2 which are designated by 20 in order to make it understood that they are in agreement with the dashed lines 20 in Fig. 3O
In Fig. 3, thus, an underlying metal sheet with the valleys 16-19 ls shown. In order to obtain a plate, an overlying me~al .
;
3 ~3 sheet formed with corresponding valleys is placed thereon. When the metal sheets are~positioned one against the other, the valleys are closed and form passages. In each plate, thus, our passages 4-7 according to Fig. 1 are formed. The cross~sectio-nal shape of the passages in the turning zone is apparent romthe dashed lines in the upper part of Fig. 2.
In ~ig. 2, the numeral 21 designates a sheet metal casing about the plate package, and in said casing the medium is inclu-ded whith flows about and between the plates.
The distribution connecting piece 8 is shown in ~ig t 3 by a cross-section through the lateral wall~ and also a cross-~ec-tion through the partition wall 9. For connecting the side walls in the distribution connecting piece 8 to the plates, the lower ; edges of the plates have been flattened, so that a cross-section through the plate has V-shape. Said V-shape 22, which appears from Figs 1 and 2, implies that the plates have a V-shaped open-ing with straight edges. The sides 8 are cut open to correspond-ing V-shape, so that "teeth" 23 are formed which are welded on corresponding edges of the plates. The walls 8 preferably aLe designed with substantial thiakness, and in the "teeth" 23 re-cesses 24 with corresponding V-shape are made, so that an upright edge,25 extending in V-shape is formed. Said edge 25 abuts the ree edge o the plates, and oW~n~ to the edge 25 projecting rom the side 8 the po~sibility o welding to the lateral edge of the plate is improved~ The plates in general are ~ointed all about along the edges 26.
The structure has a good strength, and high temperature di-ferences can be permitted. The plates bend only slightly, and attachments in turning boxes or the like are not afected.
The 10w unction of the medium 10wing in the plates is shown in Fig. 1~ The medium flows in at arrow 10, is distributed in the passages 4 and 5, flows upward to the upper end of the plates, turns in the so-called turning zone, flows back in the passages 6 and 7 and out through the distribution connecting piece 8 according to arrow 11. See also Fig. 3. ~he medium flow-ing outside the plates can be guided in that a gasket strip, or example of teflon, is laid in between the outer surfaces o two , , 4 ~L~3~2~3 plates along the valley line between the passages 5 and G, i.e. between the valleys 17 and 18. ~ereby a pure countercur-rent between tha media can be obta.ned.
`~ ' . -, . ' .
, :.
'~'' ' '' ' ' ' ' ~ ' , :
' :
,~y --1--_late Heat Exchanger This invention relates to a plate heat exchanger, which comprises a plurality of plates arranged to the side of each other and each consisting of two metal sheets, which are welded 5 one to the other along two parallel edges cmd have longitudinal bulgings in parallel with said edges. The present invention has the object to produce a plate heat exchanger where the medium flowing within the plate is guided in a direction in parallel with the extension of the bulgings and back in the same direction.
10 This arrangement implies the further gain that substantially all surfaces of the plates flown through by a medium participate in the heat exchange. This is not the case, for example, when at one end of the plate a box is used for turning the medium flowing through the plates.
In general terms, the present invention provides a plate heat exchanger comprising a plurality of plates, which are ar-ranged to the side of each other and each of which consists of two metal sheets, which are welded one to the other along two parallel ed~es and are corrugated forming longitudinal bulgings 20 in parallel with said edges, whereby longitudinal passages are formed in the plates/ characterized in that each plate at one end is formed with a turning zone in that the bulgings in pairs meet in such a manner, that in the sheet plane two outermost bulgings meet along a semicircle line, thereafter the two bulgings next 25 to the outermost ones, a.s.o., and the number of hulgings is an integer number, whereby the one half of the number of passages of each of the parallel plates are connected to a common maniEold and the second half of the number of passages are connected to a common collecting main. The bulgings connected in pairs are 30 either symmetrical in cross-sectional shape and reversed one relative to the other.
~3~73 -la-An embodiment of the invention is described in the fol-lowing,with reference to the accompanying drawings, in which Fig. 1 is a perspecti~e view seen obliquely from below of four plates with associated intakes, the casing about the heat exchanger being omitted, Fig. 2 is a lateral view on an enlarged scale of the plates seen against the edge joints of the plates, Fig. 3 is a section along the line III~-III in Fig. 2 and, thus, a horizontal view of a metal sheet comprised in a plate.
Fig. 1 thus, shows in a perspective way four plates, which are arranged to the side of each other and provided with an in-take. The plates 1 at the embodiment shown are four in number and assembled of two metal sheets 2 and 3 so as to Eorm a hollow flow body, see Fig. 2. Each plate has four passages ~, 5, 6 and 15 7. At the upper end of the plates a turning zone is formed so that the passage ~ turns into the passage 7, and the passage 5 turns into the passage 6. The design of the passages will be-come apparent in greatex detail from the following. At the lower edge of the plates a distribution connecting piece 8 is ~ - 2 ~3~27~
attached, wi hin which a partition sheet 9 is located to s~pa-rate the passages 4 and 5 from the passages 6 and 7. A medium is hereby caused to flow into the plates according to arrow 10 and out of the plates according to arrow 11. In Fig. 1 the dist-ribution connecting piece 8 is shown on an enlarged scale rela-tive to the plates in order to simplify the illustration. The length of the plates 1, of course, can be varied entirely as desired in respect of the size of the heat surfaces. The second medium participating in the heat exchange flows between the plates 1, for example according to arrow 12. The flow path may also be from above according to arrow 13 and thereafter ou~ward at the arrows 14 and 15. ~ casing of sheet metal`is then placed about the`plate package with an inlet provided a~ the upper edge and one or several outlets provided close to the areas marked 1S by the arrows 14 and 15.
Figs 2 and 3 illustrate the structure of the plates and of the metal sheets constituting the same. Fig. 3 is a section a-long the line III-III in Fig. 2 and, thus, may be said to illu-strate a metal sheet 3 seen ~rom the inside. The metal sheet has longltudi~al bulgings 16, 17, 18 and 19, which may consist o valleys o symm~tric shape, ~or example a portion of an arc.
~n Figs 2 and 3 a special shape is shown where the valle~s have a cross-~ectional shape resembling half a pear, see the dashed lines 20. This shape, thuA, is asymmetrlc relative to a central line in the valley. In order to render it possible, for example, for the passages 16 and 19 to meet in the turning zone, i.e.
at the upper end of the plates, the asymmetric shape for the passages 16 and 19 must be identical but reversed, as also appears from Fig. 3.
The cross-sectional shape of the valley 17 is equal but re-versed to that o the valley 16, and the cross-sectional shape or the valley 18 is reversed relative to the cross-sectional shape ~or the valley 17. A cross-section along the line II-II
in Fig. 3 thereby yields the dashed lines in the upper part o~
Fig. 2 which are designated by 20 in order to make it understood that they are in agreement with the dashed lines 20 in Fig. 3O
In Fig. 3, thus, an underlying metal sheet with the valleys 16-19 ls shown. In order to obtain a plate, an overlying me~al .
;
3 ~3 sheet formed with corresponding valleys is placed thereon. When the metal sheets are~positioned one against the other, the valleys are closed and form passages. In each plate, thus, our passages 4-7 according to Fig. 1 are formed. The cross~sectio-nal shape of the passages in the turning zone is apparent romthe dashed lines in the upper part of Fig. 2.
In ~ig. 2, the numeral 21 designates a sheet metal casing about the plate package, and in said casing the medium is inclu-ded whith flows about and between the plates.
The distribution connecting piece 8 is shown in ~ig t 3 by a cross-section through the lateral wall~ and also a cross-~ec-tion through the partition wall 9. For connecting the side walls in the distribution connecting piece 8 to the plates, the lower ; edges of the plates have been flattened, so that a cross-section through the plate has V-shape. Said V-shape 22, which appears from Figs 1 and 2, implies that the plates have a V-shaped open-ing with straight edges. The sides 8 are cut open to correspond-ing V-shape, so that "teeth" 23 are formed which are welded on corresponding edges of the plates. The walls 8 preferably aLe designed with substantial thiakness, and in the "teeth" 23 re-cesses 24 with corresponding V-shape are made, so that an upright edge,25 extending in V-shape is formed. Said edge 25 abuts the ree edge o the plates, and oW~n~ to the edge 25 projecting rom the side 8 the po~sibility o welding to the lateral edge of the plate is improved~ The plates in general are ~ointed all about along the edges 26.
The structure has a good strength, and high temperature di-ferences can be permitted. The plates bend only slightly, and attachments in turning boxes or the like are not afected.
The 10w unction of the medium 10wing in the plates is shown in Fig. 1~ The medium flows in at arrow 10, is distributed in the passages 4 and 5, flows upward to the upper end of the plates, turns in the so-called turning zone, flows back in the passages 6 and 7 and out through the distribution connecting piece 8 according to arrow 11. See also Fig. 3. ~he medium flow-ing outside the plates can be guided in that a gasket strip, or example of teflon, is laid in between the outer surfaces o two , , 4 ~L~3~2~3 plates along the valley line between the passages 5 and G, i.e. between the valleys 17 and 18. ~ereby a pure countercur-rent between tha media can be obta.ned.
`~ ' . -, . ' .
, :.
'~'' ' '' ' ' ' ' ~ ' , :
' :
Claims (4)
1. A plate heat exchanger comprising:
(a) a plurality of plates exposed to a first heat exchange medium and arranged face-to-face, each plate in-cluding a heat exchange portion carrying a second heat exchange medium, said heat exchange portion having a first zone defining 2n longitudinally extending, distinct, tubular bulgings, and a second zone having n distinct tubular bulgings disposed in concentric semicircles at an end of the plate, wherein n is a positive whole number, (b) said first and second zones mate so that the two outermost bulgings in the first zone are interconnected by the next outermost bulging in the second zone, seriatim, and (c) heat exchange is effected between said first and second media when said second medium is caused to flow through said bulgings in said plates.
(a) a plurality of plates exposed to a first heat exchange medium and arranged face-to-face, each plate in-cluding a heat exchange portion carrying a second heat exchange medium, said heat exchange portion having a first zone defining 2n longitudinally extending, distinct, tubular bulgings, and a second zone having n distinct tubular bulgings disposed in concentric semicircles at an end of the plate, wherein n is a positive whole number, (b) said first and second zones mate so that the two outermost bulgings in the first zone are interconnected by the next outermost bulging in the second zone, seriatim, and (c) heat exchange is effected between said first and second media when said second medium is caused to flow through said bulgings in said plates.
2. A plate heat exchanger as defined in claim 1, wherein said bulgings are connected in pairs that are symmetrical and curvilinear in cross-section.
3. A plate heat exchanger as defined in claim 1 wherein said bulgings are connected in pairs, curvilinear and asymmetric in cross-section, and adjacent ones are reversed relative to each other.
4. A plate heat exchanger as defined in claim 2 or claim 3, wherein said curvilinear cross-section of said bulgings defines a substantially triangular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA338,695A CA1130273A (en) | 1979-10-30 | 1979-10-30 | Plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA338,695A CA1130273A (en) | 1979-10-30 | 1979-10-30 | Plate heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130273A true CA1130273A (en) | 1982-08-24 |
Family
ID=4115463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA338,695A Expired CA1130273A (en) | 1979-10-30 | 1979-10-30 | Plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1130273A (en) |
-
1979
- 1979-10-30 CA CA338,695A patent/CA1130273A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |