EP0319520A1 - Method of making a heat exchanger - Google Patents
Method of making a heat exchanger Download PDFInfo
- Publication number
- EP0319520A1 EP0319520A1 EP89101072A EP89101072A EP0319520A1 EP 0319520 A1 EP0319520 A1 EP 0319520A1 EP 89101072 A EP89101072 A EP 89101072A EP 89101072 A EP89101072 A EP 89101072A EP 0319520 A1 EP0319520 A1 EP 0319520A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubes
- tube
- strip
- medium
- partition
- 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.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits
Definitions
- the invention relates to a method in the manufacture of a heat exchanger according to the preamble of claim 1.
- a heat exchanger comprising a plastics tank and metal tubes as well as a method of making such a heat exchanger are disclosed by EP 0,000,189, according to which round tubes bent into U shape are connected with a tank having an inlet and an outlet chamber separated from each other such that a U-shaped flow is imparted to the cooling or heating medium within the heat exchanger. Furthermore, it is previously known to provide a heat exchanger with flat tubes between two tanks, thereby to provide a larger heat transfer surface and to reduce the heat exchanger dimensions without detracting from its heat transfer capacity.
- the present invention aims at providing a method of making a heat exchanger having a higher temperature efficiency per m2 of heat exchanger surface, to establish communication between the tank and the heat transfer pile by, for example, gluing a tank made of injection moulded plastics to a heat transfer pile made of aluminium, and to provide a heat exchanger having a better seal between these components, lower weight, smaller dimensions and thus taking up less space.
- a heat transfer pile is equipped with flat tubes which, in their longitudinal direction, have a partition extending to a point at a distance from the tube bottom to form a flat flow channel of U shape.
- the flat tubes give the advantage of a larger heat transfer surface, while simultaneously reducing the size of the heat exchanger for a given heat transfer capacity, an important advantage when such heat exchangers are used as vehicle coolers or heaters.
- Fig. 1 illustrates a heat exchanger 1 with a heat transfer pile 2 comprising on the one hand a plurality of tubes 3 for circulating a first medium, such as water, and on the other hand a plurality of fin units 4 which are arranged alternately with the tubes 3 and past which a second medium, such as air, is intended to flow.
- the heat exchanger 1 can operate both as a heater and as a cooler.
- the fin units 4 consist of a perforated and folded strip which is described below.
- Each tube 3 has at one end an inlet 5 and an outlet 6 and is closed at its other end.
- Each tube 3 has a partition in the form of a rod 7 which is inserted in the tube 3 and has its inner end located at a distance from the closed end of the tube, whereby a U channel for circulation of the water is formed.
- the water thus enters at the inlet 5, flows through the U channel and is discharged through the outlet 6.
- a tank 8 having an inlet chamber 9 and an outlet chamber 10 is connected to the open ends of the tubes 3, the tube inlet 5 communicating with the inlet chamber 9 and the tube outlet 6 communicating with the outlet chamber 10.
- the water flows into the inlet chamber 10 of the tank 8 via an inlet piece 11 and then flows through the U channels of the tubes 3 and into the outlet chamber 10 of the tank 8, from which the water is finally discharged via an outlet piece 12 schematically illustrated in Fig.
- the second medium is air which flows through the fin units 4 in the direction of the arrow A. If the heat exchanger is used as a cooler, the air flow cools the water in the tubes 3, and inversely the air flow is heated by the water when the heat exchanger is used as a heater, for example a car heater.
- the specific flat shape of the tubes 3 provides a large heat transfer area which, together with the U shaped water flow path, gives an excellent exchange of heat.
- the heat exchanger 1 has upper and lower plates 13 to stiffen the heat transfer pile 2.
- the rear end wall 14 of the heat exchanger 1 consists of tube end portions 15 bent through about 90° when the tubes 3 are closed.
- the tank 8 constitutes the front end wall.
- Fig. 2 illustrates the construction of a tube 3.
- the tube which preferably is made of aluminium, has a U channel with an inlet 5 and an outlet 6.
- the end of the tube 3 is closed by bending the end portion 15 through about 90°, and the rod 7 is inserted to form a partition within the tube 3.
- the outer end portion 16 of the rod 7 projects beyond the open tube end, i.e. past the inlet 5 and the outlet 6, while its inner end 17 is located at a distance from the closed tube end 15.
- the tube 3 is flanged to provide a larger inlet and outlet area upon connection to the connecting pieces described below.
- the flanging also serves to reduce the throttling which occurs at the junction between the tubes and the connecting pieces.
- the outer side of the tube 3 has indentations 18 to provide discontinuities within the tube. These discontinuities produce a turbulent water flow and serve as guide means for the rod 7.
- Fig. 3 illustrates a section of the tube 3 and clearly shows the flat tube shape.
- the space of the tube 3 to the right of the rod 7 constitutes the inlet side of the U channel, while the left-hand space constitutes the tube outlet side.
- the indentations 18 in the upper and lower sides of the tube 3 form internal ridges 19 and serve to produce a turbulent flow.
- the ridges 19 preferably are slightly oblique and, together with the rod 7, form an arrow-head pattern (see Fig. 2).
- the partition may be formed, instead of by the rod 7, by impressing from the flat sides of the tube 3 longitudinal ridges which are sealingly interconnected in a subsequent operation.
- the ridge portion thus impressed has preferably the same extent in the tube 3 as the rod 7 (see Fig. 2).
- Figs. 4A and B show that part of the tank 8 which is to be connected to the inlets 5 and outlets 6 of the tubes 3.
- First projecting connecting pieces 20 correspond to the inlets 5 of the tubes 3, while second projecting connecting pieces 21 correspond to the outlets 6 of the tubes 3.
- a recess 23 is provided which is adapted to accommodate the end portion 16 of the rod 7 projecting from the tube 3.
- Each pair of connecting pieces 20, 21 is surrounded by throughs 22 which are shallower than the recess 23.
- Each connecting piece has adhesive passages 26, the function of which will be described below.
- Each pair of connecting pieces 20, 21 and each trough 22 are surrounded by a wall 27 which is considerably thicker than the connecting pieces 20, 21.
- an adhesive for example glue
- the tank 8 Upon connection of the tank 8 to the inlets 5 and outlets 6 of the tubes 3 comprised by the heat transfer pile 2, an adhesive, for example glue, is first applied to the troughs 22, whereupon the tank 8 is pressed onto the open flanged ends of the tubes 3, any excess adhesive flowing into the adhesive passages 26 to ensure tight connection.
- the projecting end portion 16 of the rod 7 (see Fig. 2) is received in the recess 23 which preferably is also filled with adhesive to further stabilise the connection.
- Fig. 5 illustrates a strip 28 which preferably is made from aluminium and which, after folding, forms a fin unit 4 for the heat transfer pile 2.
- the strip 28 has perforations in the form of first slits 29 and second slits 30.
- the slits 29, 30 are punched from the strip 28 and widened by bending.
- the first slits 29 are formed such that their openings are facing the openings of the second slits 30, as is best shown in Fig. 6.
- the strip 28 provided with slits 29, 30 is folded, and the fin units 4 are then placed alternately between the tubes 3 in the heat transfer pile 2 of the heat exchanger 1.
- the opposing slits 29, 30 will divide and split up the air flow in the heat transfer pile 2 and serve to break up a laminar boundary layer which, on a planar surface, would position itself as an insulation.
- the heat exchanger 1 operates as follows.
- the water to be cooled flows into the tank 8 via the inlet piece 11 and on through the U channels of the tubes 3 and leaves the tank 8 through the outlet piece 12.
- the air flows in a zigzag-like manner through the heat transfer pile 2 comprising the tubes 3 and the fin units 4, and because of the above-mentioned slits 29, 30 the air is distributed through the entire pile 2 to ensure satisfactory heat exchange.
- the ridges 19 in the tubes 3 promote turbulent flow of the water passing through the U channels of the tubes 3, whereby the heat exchange is further improved.
- the heat exchanger 1 may be manufactured as follows. First a preplated strip blank is bent to form a tube, the longitudinal edges of the blank being joined together by welding or seaming. Before welding or seaming is effected, continuities are provided in the strip, and after the strip has been bent, these discontinuities will lie on the inner side of the strip. Also a strip band which has not been preplated may be employed, and plating may be effected for instance after bending by passing the strip through a solder bath prior to welding or seaming. After that, the bent strip is flattened and cut into tube blanks which are closed at one end by clenching. During the closing operation, the other end of the tube blank may be preliminarily flanged to fit the connecting pieces on the tank.
- a partition is provided in the longitudinal direction of each tube blank, the inner end of the partition being arranged at a distance from the closed end portion of the tube blank to form a U-shaped flow channel. Then the closed end portions of the tube blanks are bent through an angle of about 90°, and the tubes 3 are now finished.
- the fin units 4 are manufactured in a different and shorter production line.
- the starting material of the fin units consists of a strip 28 which is punched to provide slits 29, 30 extending longitudinally of the strip 28 and forming lines of first and second slit areas extending transversely of the strip 28.
- the slits 29, 30 are bent out of the band 28 (i.e. out of the plane of the drawing in Fig. 5), such that the openings of the slits 29 are directed against the openings of the slits 30.
- the slitted strip 28 is folded alternately in one and the other direction along folding lines B and C to form an endless folded fin strip.
- the length of the slits 29, 30 preferably is somewhat shorter than the width of the fin unit 4 between the tubes 3.
- the folded fin strip is cut into lengths slightly shorter than the length of the tubes 3.
- the tubes 3 and the fin units 4 formed by cutting the endless fin strip are now alternately stacked in a fixture and compressed with a predetermined force, such that the tube ends folded approximately through 90° will overlap one another in the heat transfer pile 2 formed by the stacking, and will form one end wall 14 of the pile 2.
- a predetermined force such that the tube ends folded approximately through 90° will overlap one another in the heat transfer pile 2 formed by the stacking, and will form one end wall 14 of the pile 2.
- the heat transfer pile stacked in the fixture is now inserted in a soldering oven, the temperature of which is gradually increased to establish a subpressure so that the plating previously applied to the tubes 3 and the plates 13 will melt and, through capillary action, seep into the narrow pockets between the plates and the fin units, between the tubes and the fin units, and between the tubes and the partitions thereof. In this manner, no oxidation will occur because of the subpressure prevailing in the oven.
- the heat transfer pile 2 is then removed from the oven and allowed to cool.
- the open ends of the tube 3 are flanged to obtain a form corresponding to the connecting pieces in the tank. If flanging has been carried out in this manner, a calibrating subsequent flanging is effected. After that, each tube in the heat transfer pile 2 is pressure-tested and then oven-aged for tempering.
- the heat transfer pile 2 is combined with an injection-moulded tank preferably of plastics, adhesive being applied in the troughs 22 around the connecting pieces 20, 21, and the tube ends of the heat transfer pile are inserted into their respective adhesive troughs, the outer end portion 16 of the rods 7 being inserted in corresponding recesses 23.
- the adhesive is then allowed to set to form a finished heat exchanger.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Heat Treatment Of Articles (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Liquid Developers In Electrophotography (AREA)
Abstract
Description
- The invention relates to a method in the manufacture of a heat exchanger according to the preamble of claim 1.
- A heat exchanger comprising a plastics tank and metal tubes as well as a method of making such a heat exchanger are disclosed by EP 0,000,189, according to which round tubes bent into U shape are connected with a tank having an inlet and an outlet chamber separated from each other such that a U-shaped flow is imparted to the cooling or heating medium within the heat exchanger. Furthermore, it is previously known to provide a heat exchanger with flat tubes between two tanks, thereby to provide a larger heat transfer surface and to reduce the heat exchanger dimensions without detracting from its heat transfer capacity. In addition, it is already known, inter alia from the above-mentioned EP 0,000,189 to glue metal tubes on a plastics tank, the tank being provided with connecting pieces for gluing the tubes to the tank, the round tubes being flanged before they are mounted or pressed onto the tank, an arrangement which is disadvantageous because the adhesive tends to flow out, thereby jeopardising the tight seal of the tubes against the tank.
- The present invention aims at providing a method of making a heat exchanger having a higher temperature efficiency per m² of heat exchanger surface, to establish communication between the tank and the heat transfer pile by, for example, gluing a tank made of injection moulded plastics to a heat transfer pile made of aluminium, and to provide a heat exchanger having a better seal between these components, lower weight, smaller dimensions and thus taking up less space.
- These objects are achieved, according to the present invention, by a method of making a heat exchanger, said method being characterised by the features stated in claims 1-10.
- According to the invention, a heat transfer pile is equipped with flat tubes which, in their longitudinal direction, have a partition extending to a point at a distance from the tube bottom to form a flat flow channel of U shape. The flat tubes give the advantage of a larger heat transfer surface, while simultaneously reducing the size of the heat exchanger for a given heat transfer capacity, an important advantage when such heat exchangers are used as vehicle coolers or heaters.
- The invention will now be described in more detail on the basis of a preferred embodiment and with reference to the accompanying drawings.
- Fig. 1 is a perspective view of a heat exchanger, in which certain parts of the tank have been removed.
- Fig. 2 is a perspective view of a tube comprised by the heat exchanger.
- Fig. 3 is a section along line III-III in Fig. 2.
- Fig. 4A is a side view of a tank with connecting pieces for connection to the tubes.
- Fig. 4B is a section along the line IV-IV in Fig. 4A.
- Fig. 5 is a top view of a perforated strip included in the fin unit of the heat exchanger.
- Fig. 6 is a section along line VI-VI in Fig. 5.
- Fig. 1 illustrates a heat exchanger 1 with a heat transfer pile 2 comprising on the one hand a plurality of
tubes 3 for circulating a first medium, such as water, and on the other hand a plurality of fin units 4 which are arranged alternately with thetubes 3 and past which a second medium, such as air, is intended to flow. The heat exchanger 1 can operate both as a heater and as a cooler. The fin units 4 consist of a perforated and folded strip which is described below. Eachtube 3 has at one end aninlet 5 and an outlet 6 and is closed at its other end. Eachtube 3 has a partition in the form of a rod 7 which is inserted in thetube 3 and has its inner end located at a distance from the closed end of the tube, whereby a U channel for circulation of the water is formed. The water thus enters at theinlet 5, flows through the U channel and is discharged through the outlet 6. A tank 8 having aninlet chamber 9 and anoutlet chamber 10 is connected to the open ends of thetubes 3, thetube inlet 5 communicating with theinlet chamber 9 and the tube outlet 6 communicating with theoutlet chamber 10. The water flows into theinlet chamber 10 of the tank 8 via an inlet piece 11 and then flows through the U channels of thetubes 3 and into theoutlet chamber 10 of the tank 8, from which the water is finally discharged via anoutlet piece 12 schematically illustrated in Fig. 1 and mounted on the upper part of the tank 8. In the embodiment illuillustrated, the second medium is air which flows through the fin units 4 in the direction of the arrow A. If the heat exchanger is used as a cooler, the air flow cools the water in thetubes 3, and inversely the air flow is heated by the water when the heat exchanger is used as a heater, for example a car heater. The specific flat shape of thetubes 3 provides a large heat transfer area which, together with the U shaped water flow path, gives an excellent exchange of heat. Finally, the heat exchanger 1 has upper andlower plates 13 to stiffen the heat transfer pile 2. Therear end wall 14 of the heat exchanger 1 consists oftube end portions 15 bent through about 90° when thetubes 3 are closed. The tank 8 constitutes the front end wall. - Fig. 2 illustrates the construction of a
tube 3. The tube which preferably is made of aluminium, has a U channel with aninlet 5 and an outlet 6. To form the U-channel, the end of thetube 3 is closed by bending theend portion 15 through about 90°, and the rod 7 is inserted to form a partition within thetube 3. Theouter end portion 16 of the rod 7 projects beyond the open tube end, i.e. past theinlet 5 and the outlet 6, while itsinner end 17 is located at a distance from the closedtube end 15. At theinlet 5 and the outlet 6, thetube 3 is flanged to provide a larger inlet and outlet area upon connection to the connecting pieces described below. The flanging also serves to reduce the throttling which occurs at the junction between the tubes and the connecting pieces. Moreover, the outer side of thetube 3 hasindentations 18 to provide discontinuities within the tube. These discontinuities produce a turbulent water flow and serve as guide means for the rod 7. - Fig. 3 illustrates a section of the
tube 3 and clearly shows the flat tube shape. The space of thetube 3 to the right of the rod 7 constitutes the inlet side of the U channel, while the left-hand space constitutes the tube outlet side. Theindentations 18 in the upper and lower sides of thetube 3 forminternal ridges 19 and serve to produce a turbulent flow. Theridges 19 preferably are slightly oblique and, together with the rod 7, form an arrow-head pattern (see Fig. 2). In an alternative embodiment, the partition may be formed, instead of by the rod 7, by impressing from the flat sides of thetube 3 longitudinal ridges which are sealingly interconnected in a subsequent operation. The ridge portion thus impressed has preferably the same extent in thetube 3 as the rod 7 (see Fig. 2). - Figs. 4A and B show that part of the tank 8 which is to be connected to the
inlets 5 and outlets 6 of thetubes 3. First projecting connectingpieces 20 correspond to theinlets 5 of thetubes 3, while second projecting connectingpieces 21 correspond to the outlets 6 of thetubes 3. Between adjacent connectingpieces recess 23 is provided which is adapted to accommodate theend portion 16 of the rod 7 projecting from thetube 3. Each pair of connectingpieces throughs 22 which are shallower than therecess 23. Each connecting piece hasadhesive passages 26, the function of which will be described below. Each pair of connectingpieces trough 22 are surrounded by awall 27 which is considerably thicker than the connectingpieces inlets 5 and outlets 6 of thetubes 3 comprised by the heat transfer pile 2, an adhesive, for example glue, is first applied to thetroughs 22, whereupon the tank 8 is pressed onto the open flanged ends of thetubes 3, any excess adhesive flowing into theadhesive passages 26 to ensure tight connection. The projectingend portion 16 of the rod 7 (see Fig. 2) is received in therecess 23 which preferably is also filled with adhesive to further stabilise the connection. - Fig. 5 illustrates a
strip 28 which preferably is made from aluminium and which, after folding, forms a fin unit 4 for the heat transfer pile 2. Thestrip 28 has perforations in the form offirst slits 29 andsecond slits 30. Theslits strip 28 and widened by bending. Thefirst slits 29 are formed such that their openings are facing the openings of thesecond slits 30, as is best shown in Fig. 6. During manufacture of the fin unit 4, thestrip 28 provided withslits tubes 3 in the heat transfer pile 2 of the heat exchanger 1. When the air flows past the fin units 4, theopposing slits - Briefly, the heat exchanger 1 operates as follows. The water to be cooled flows into the tank 8 via the inlet piece 11 and on through the U channels of the
tubes 3 and leaves the tank 8 through theoutlet piece 12. The air flows in a zigzag-like manner through the heat transfer pile 2 comprising thetubes 3 and the fin units 4, and because of the above-mentionedslits ridges 19 in thetubes 3 promote turbulent flow of the water passing through the U channels of thetubes 3, whereby the heat exchange is further improved. - The heat exchanger 1 according to the preferred embodiment may be manufactured as follows. First a preplated strip blank is bent to form a tube, the longitudinal edges of the blank being joined together by welding or seaming. Before welding or seaming is effected, continuities are provided in the strip, and after the strip has been bent, these discontinuities will lie on the inner side of the strip. Also a strip band which has not been preplated may be employed, and plating may be effected for instance after bending by passing the strip through a solder bath prior to welding or seaming. After that, the bent strip is flattened and cut into tube blanks which are closed at one end by clenching. During the closing operation, the other end of the tube blank may be preliminarily flanged to fit the connecting pieces on the tank. After that, a partition is provided in the longitudinal direction of each tube blank, the inner end of the partition being arranged at a distance from the closed end portion of the tube blank to form a U-shaped flow channel. Then the closed end portions of the tube blanks are bent through an angle of about 90°, and the
tubes 3 are now finished. - The fin units 4 are manufactured in a different and shorter production line. As with the
tubes 3, the starting material of the fin units consists of astrip 28 which is punched to provideslits strip 28 and forming lines of first and second slit areas extending transversely of thestrip 28. Theslits slits 29 are directed against the openings of theslits 30. After that theslitted strip 28 is folded alternately in one and the other direction along folding lines B and C to form an endless folded fin strip. The length of theslits tubes 3. The folded fin strip is cut into lengths slightly shorter than the length of thetubes 3. - The
tubes 3 and the fin units 4 formed by cutting the endless fin strip are now alternately stacked in a fixture and compressed with a predetermined force, such that the tube ends folded approximately through 90° will overlap one another in the heat transfer pile 2 formed by the stacking, and will form oneend wall 14 of the pile 2. When the tubes and the fin units are stacked, it is also possible to provide at the two ends of heat transfer pile 2 two plated sheets of preferably aluminium for stiffening the completed heat transfer pile 2. The heat transfer pile stacked in the fixture is now inserted in a soldering oven, the temperature of which is gradually increased to establish a subpressure so that the plating previously applied to thetubes 3 and theplates 13 will melt and, through capillary action, seep into the narrow pockets between the plates and the fin units, between the tubes and the fin units, and between the tubes and the partitions thereof. In this manner, no oxidation will occur because of the subpressure prevailing in the oven. The heat transfer pile 2 is then removed from the oven and allowed to cool. The open ends of thetube 3 are flanged to obtain a form corresponding to the connecting pieces in the tank. If flanging has been carried out in this manner, a calibrating subsequent flanging is effected. After that, each tube in the heat transfer pile 2 is pressure-tested and then oven-aged for tempering. - Finally, the heat transfer pile 2 is combined with an injection-moulded tank preferably of plastics, adhesive being applied in the
troughs 22 around the connectingpieces outer end portion 16 of the rods 7 being inserted in corresponding recesses 23. The adhesive is then allowed to set to form a finished heat exchanger.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89101072T ATE76184T1 (en) | 1985-06-18 | 1986-06-05 | MANUFACTURING PROCESS OF A HEAT EXCHANGER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8503013A SE457476B (en) | 1985-06-18 | 1985-06-18 | PROCEDURE FOR MANUFACTURE OF HEAT EXCHANGE IN WHICH ONE MEDIUM IS GUIDED IN UN-FORMED CHANNELS |
SE8503013 | 1985-06-18 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86903682.2 Division | 1986-06-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0319520A1 true EP0319520A1 (en) | 1989-06-07 |
EP0319520B1 EP0319520B1 (en) | 1992-05-13 |
Family
ID=20360614
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86903682A Expired - Lifetime EP0258253B1 (en) | 1985-06-18 | 1986-06-05 | Heat exchanger |
EP89101072A Expired - Lifetime EP0319520B1 (en) | 1985-06-18 | 1986-06-05 | Method of making a heat exchanger |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86903682A Expired - Lifetime EP0258253B1 (en) | 1985-06-18 | 1986-06-05 | Heat exchanger |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP0258253B1 (en) |
AT (1) | ATE76184T1 (en) |
DE (1) | DE3685335D1 (en) |
ES (2) | ES8801595A1 (en) |
SE (1) | SE457476B (en) |
WO (1) | WO1986007628A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757218A1 (en) * | 1995-07-31 | 1997-02-05 | Valeo Climatisation | U-flow tube for heat exchanger and method for manufacturing same |
FR2738905A1 (en) * | 1995-09-20 | 1997-03-21 | Valeo Climatisation | HEAT EXCHANGER TUBE WITH CONTOUR-CURRENT CIRCULATION CHANNELS |
WO2009001311A1 (en) * | 2007-06-26 | 2008-12-31 | Metal Brain, Llc | Heat exchanger |
CN111958197A (en) * | 2020-08-17 | 2020-11-20 | 青岛恒恩智能装备有限公司 | Continuous production method and equipment for forming and applying built-in condenser |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3809944A1 (en) * | 1988-03-24 | 1989-10-12 | Sueddeutsche Kuehler Behr | Heat exchanger, in particular a radiator for an internal-combustion engine of a motor vehicle, and method for producing it |
DE4026988C2 (en) * | 1990-08-25 | 1999-10-28 | Behr Gmbh & Co | Heat exchanger with a package of flat tubes and corrugated fin units |
SE469912C (en) * | 1992-09-30 | 1996-04-22 | Valeo Engine Cooling Ab | Vehicle cooler with flat pipes in rows where the pipes have widened end portions and the adjacent row of touching portions |
FR2786558B1 (en) | 1998-11-30 | 2001-02-02 | Valeo Thermique Moteur Sa | FLAT TUBE FOR REDUCED WIDTH HEAT EXCHANGER |
DE10127084B4 (en) * | 2000-06-17 | 2019-05-29 | Mahle International Gmbh | Heat exchanger, in particular for motor vehicles |
GB2509762B (en) | 2013-01-14 | 2015-02-04 | Halla Visteon Climate Control | Tube for Heat Exchanger |
WO2021057984A1 (en) * | 2019-09-27 | 2021-04-01 | 浙江盾安人工环境股份有限公司 | Heat exchanger |
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DE527341C (en) * | 1931-06-17 | Friedrich Emil Krauss | Black plate radiator for motor vehicles | |
US1910486A (en) * | 1930-01-13 | 1933-05-23 | Wagner Rudolf | Heat exchange apparatus |
GB393390A (en) * | 1932-03-23 | 1933-06-08 | Thomas Bosanko Collins | Heat exchange apparatus, particularly applicable to the radiators and oil coolers of automobile and aircraft engines |
US2414159A (en) * | 1943-04-19 | 1947-01-14 | Modine Mfg Co | Radiator construction |
SE183405C1 (en) * | 1962-05-30 | 1963-04-30 | Uddeholms Ab | |
FR1389144A (en) * | 1964-03-02 | 1965-02-12 | heat exchanger | |
FR1473291A (en) * | 1966-02-02 | 1967-03-17 | heat exchangers | |
DE1501629A1 (en) * | 1965-06-17 | 1969-11-06 | Chausson Usines Sa | Radiator block made of adjacent radiator elements |
CH527403A (en) * | 1971-11-17 | 1972-08-31 | Steeb Dieter Chr | Parallel rib heat exchanger - whose ribs are of parallel pairs of plates with internal weirs |
FR2147878A1 (en) * | 1971-08-05 | 1973-03-11 | Chausson Usines Sa | Rectangular heat exchange tube - with seam soldered along support provided by an insert |
GB1349459A (en) * | 1970-07-16 | 1974-04-03 | Paramount Glass Mfg Co Ltd | Cooling fins |
GB1374982A (en) * | 1972-04-28 | 1974-11-20 | Ass Eng Ltd | Heat exchangers |
DE2855285A1 (en) * | 1978-12-21 | 1980-07-03 | Kloeckner Humboldt Deutz Ag | Oil-cooling heat exchanger assembly - comprises strip-shaped hollow bodies with openings in opposite faces and internal partitions |
GB2116687A (en) * | 1982-03-13 | 1983-09-28 | Dieter Steeb | Flat tube heat exchanger |
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DE3440489C2 (en) * | 1984-11-06 | 1987-08-20 | Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart, De |
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GB2110812B (en) * | 1981-11-28 | 1984-11-14 | Imi Marston Ltd | Heat exchanger |
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1985
- 1985-06-18 SE SE8503013A patent/SE457476B/en not_active IP Right Cessation
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1986
- 1986-06-05 EP EP86903682A patent/EP0258253B1/en not_active Expired - Lifetime
- 1986-06-05 AT AT89101072T patent/ATE76184T1/en not_active IP Right Cessation
- 1986-06-05 DE DE8989101072T patent/DE3685335D1/en not_active Expired - Fee Related
- 1986-06-05 EP EP89101072A patent/EP0319520B1/en not_active Expired - Lifetime
- 1986-06-05 WO PCT/SE1986/000262 patent/WO1986007628A1/en active IP Right Grant
- 1986-06-18 ES ES556215A patent/ES8801595A1/en not_active Expired
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1987
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DE527341C (en) * | 1931-06-17 | Friedrich Emil Krauss | Black plate radiator for motor vehicles | |
US1910486A (en) * | 1930-01-13 | 1933-05-23 | Wagner Rudolf | Heat exchange apparatus |
GB393390A (en) * | 1932-03-23 | 1933-06-08 | Thomas Bosanko Collins | Heat exchange apparatus, particularly applicable to the radiators and oil coolers of automobile and aircraft engines |
US2414159A (en) * | 1943-04-19 | 1947-01-14 | Modine Mfg Co | Radiator construction |
SE183405C1 (en) * | 1962-05-30 | 1963-04-30 | Uddeholms Ab | |
FR1389144A (en) * | 1964-03-02 | 1965-02-12 | heat exchanger | |
DE1501629A1 (en) * | 1965-06-17 | 1969-11-06 | Chausson Usines Sa | Radiator block made of adjacent radiator elements |
FR1473291A (en) * | 1966-02-02 | 1967-03-17 | heat exchangers | |
GB1349459A (en) * | 1970-07-16 | 1974-04-03 | Paramount Glass Mfg Co Ltd | Cooling fins |
FR2147878A1 (en) * | 1971-08-05 | 1973-03-11 | Chausson Usines Sa | Rectangular heat exchange tube - with seam soldered along support provided by an insert |
CH527403A (en) * | 1971-11-17 | 1972-08-31 | Steeb Dieter Chr | Parallel rib heat exchanger - whose ribs are of parallel pairs of plates with internal weirs |
GB1374982A (en) * | 1972-04-28 | 1974-11-20 | Ass Eng Ltd | Heat exchangers |
DE2855285A1 (en) * | 1978-12-21 | 1980-07-03 | Kloeckner Humboldt Deutz Ag | Oil-cooling heat exchanger assembly - comprises strip-shaped hollow bodies with openings in opposite faces and internal partitions |
GB2116687A (en) * | 1982-03-13 | 1983-09-28 | Dieter Steeb | Flat tube heat exchanger |
US4470452A (en) * | 1982-05-19 | 1984-09-11 | Ford Motor Company | Turbulator radiator tube and radiator construction derived therefrom |
US4546824A (en) * | 1984-03-19 | 1985-10-15 | Mccord Heat Transfer Corporation | Heat exchanger |
DE3440489C2 (en) * | 1984-11-06 | 1987-08-20 | Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart, De |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757218A1 (en) * | 1995-07-31 | 1997-02-05 | Valeo Climatisation | U-flow tube for heat exchanger and method for manufacturing same |
FR2737557A1 (en) * | 1995-07-31 | 1997-02-07 | Valeo Climatisation | U-FLOW TUBE FOR HEAT EXCHANGER AND METHOD FOR MANUFACTURING THE SAME |
FR2738905A1 (en) * | 1995-09-20 | 1997-03-21 | Valeo Climatisation | HEAT EXCHANGER TUBE WITH CONTOUR-CURRENT CIRCULATION CHANNELS |
EP0764823A1 (en) * | 1995-09-20 | 1997-03-26 | Valeo Climatisation | Heat exchanger tube with counter flow channels |
US5762133A (en) * | 1995-09-20 | 1998-06-09 | Valeo Climatisation | Heat exchanger tube with ducts for counter current fluid flow |
WO2009001311A1 (en) * | 2007-06-26 | 2008-12-31 | Metal Brain, Llc | Heat exchanger |
CN111958197A (en) * | 2020-08-17 | 2020-11-20 | 青岛恒恩智能装备有限公司 | Continuous production method and equipment for forming and applying built-in condenser |
CN111958197B (en) * | 2020-08-17 | 2022-04-22 | 青岛恒恩智能装备有限公司 | Continuous production method and equipment for forming and applying built-in condenser |
Also Published As
Publication number | Publication date |
---|---|
SE8503013D0 (en) | 1985-06-18 |
EP0258253A1 (en) | 1988-03-09 |
DE3685335D1 (en) | 1992-06-17 |
ES556215A0 (en) | 1988-02-16 |
WO1986007628A1 (en) | 1986-12-31 |
SE8503013L (en) | 1986-12-19 |
ES297013Y (en) | 1988-11-16 |
EP0319520B1 (en) | 1992-05-13 |
ATE76184T1 (en) | 1992-05-15 |
SE457476B (en) | 1988-12-27 |
ES8801595A1 (en) | 1988-02-16 |
ES297013U (en) | 1988-03-16 |
EP0258253B1 (en) | 1991-04-10 |
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