US20060108109A1 - Plate-tube type heat exchanger - Google Patents
Plate-tube type heat exchanger Download PDFInfo
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- US20060108109A1 US20060108109A1 US11/327,421 US32742106A US2006108109A1 US 20060108109 A1 US20060108109 A1 US 20060108109A1 US 32742106 A US32742106 A US 32742106A US 2006108109 A1 US2006108109 A1 US 2006108109A1
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- plate
- heat exchanger
- plates
- type heat
- tubes
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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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
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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
- F28D1/047—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 bent, e.g. in a serpentine or zig-zag
- F28D1/0477—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
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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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/20—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/045—Condensers made by assembling a tube on a plate-like element or between plate-like elements
Definitions
- the present invention relates to techniques employed in designing and manufacturing heat exchange equipment, and more particularly, it is related to a plate-tube type heat exchanger not requiring maintenance.
- plate-tube type heat exchangers are comprised by a plurality of tubes and plates, which are bonded to each other by mechanical fastening or tack welded in order to shape the exchanger structure.
- heat exchangers are used as condenser and evaporator in domestic and commercial refrigeration systems, they can also be found on water heaters by means of solar energy, air heaters including inside the tubes, an electric resistance, natural convection static condensers, forced air condensers, natural convection static evaporators and forced air evaporators.
- FIG. 1 showing a cross sectional cut of a “half coverage” type assembly used in plate-tube type heat exchangers of the prior art.
- a tube is housed in a plate channel, remaining fixed and contacting directly therewith only through a welding point.
- FIG. 2 A variant of this traditional method of assembly by welding can be appreciated in FIG. 2 , (total coverage), wherein a pair of plates similar to those in FIG. 1 are welded to each other by welding tacks, enclosing the tube between the channel thereof.
- This variant is neither efficient, since most of times the tube does not fit correctly the space formed by the plate channels, thus having a little direct contact between plates and tube for heat conduction.
- the European Patent No. 0157370 is directed to a panel for an evaporator or condenser heat exchange, said panel is also formed from an extruded sheet which includes a plurality of oval-shape grooves in cross section; inserting a tube in each of said grooves, said tube undergoes a plastic deformation at its circular wall to refill and to fit the oval contour of the groove walls, thus remaining fixed inside, reason why it is not necessary to use welding in order to bind tubes to the extruded sheet.
- An additional object of the present invention is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein there is a large contact surface between tubes and plates.
- a further object of the present invention is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein welding to firmly join tubes to plates is not used.
- Yet another object of the present invention is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein two or more plates can be firmly joined to each other, without the use of welding.
- FIG. 1 is a cross sectional view of a “half coverage” assembly, used in the tube-plate-type heat exchangers of the prior art.
- FIG. 2 is a cross sectional view of a “total coverage” assembly, used in the tube-plate-type heat exchangers of the prior art.
- FIG. 3 is a top perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with the principles of the present invention.
- FIG. 4 is a partial cross sectional view of the plate of the tube-plate-type heat exchanger in FIG. 3 , which includes a tube housed and secured in one of the channels thereof.
- FIG. 5 is a top perspective view of the plate with the tube housed and secured, shown in FIG. 4 .
- FIG. 6 is a top perspective view of a second configuration that may adopt the tube-plate-type heat exchanger of the present invention.
- FIG. 7 is a top perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with a first alternative embodiment of the present invention.
- FIG. 8 is a cross sectional view of an extruded profile plate of the heat exchanger shown in FIG. 7 .
- FIG. 9 is a cross sectional view of the extruded profile plate shown in FIG. 8 , including tubes housed and secured in the plate channels.
- FIG. 10 is a top perspective view of the extruded profile plate in FIG. 9 .
- FIGS. 11 and 11 A are cross sectional views for showing the assembly between two extruded profile plates with tubes housed and secured.
- FIG. 12 is a perspective view of a second configuration that may adopt the embodiment shown in FIG. 7 .
- FIG. 13 is a perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with a second alternative embodiment of the present invention.
- FIG. 14 is a cross sectional view of one of the extruded profile plate of the heat exchanger shown in FIG. 13 .
- FIG. 15 shows a top perspective view of the plate illustrated in FIG. 14 .
- FIGS. 16 and 16 A are cross sectional views for showing the assembly between two extruded profile plates, as shown in FIG. 14 .
- FIGS. 17 and 17 A are exploded views showing the connection of piping and/or accessories to the extruded profile plate shown in FIG. 15 .
- FIG. 18 shows a top perspective view of a second configuration that may adopt the alternative embodiment shown in FIG. 13 .
- FIG. 1 a “half coverage”-type assembly 10 used in plate-tube type heat exchangers of the prior art.
- a tube 11 is housed in the channel 14 of a plate 12 , remaining fixed and making a direct contact to it only through a welding point 13 .
- FIG. 2 a “total coverage” type assembly used in the prior art is shown.
- a pair of plates 12 ′ are welded each other via welding points 13 ′, enclosing tube 11 ′ between channels 14 ′ thereof.
- the tube 11 ′ does not fit suitably the space formed by plate channels 14 ′, thus having a little direct contact between plates and tube for heat conduction.
- FIG. 3 in which a plate-tube type heat exchanger 100 not requiring maintenance is shown, as constructed according to a particularly specific embodiment of the present invention, which must be considered as illustrative rather than limitative.
- the plate-tube type heat exchanger 100 comprises: a plate 110 with a plurality of channels 111 running parallel along thereof; and, a plurality of tubes 120 housed and secured to said channels 111 , thus forming a circuit for the circulation of a heating fluid, a cooling fluid or a means of heating.
- Plate 110 includes integrally attachment means 112 associated to each channel, as shown in FIG. 4 ; which in their closed position, cover along with its corresponding channel, almost the entire tube external perimeter housing in said channel, thereby securing each of the tubes 120 to the whole plate, without the use of welding and at the same time, a large contact surface 113 is achieved for the heat conduction between plate 110 and each one of the tubes 120 , as can be seen in FIGS. 4 and 5 .
- the plurality of attachment means 112 are preferably longitudinal plates from the same plate formed by mechanical means, and extending from both sides of each one of the channels 111 .
- channels 111 are preferably semicircular or “C”-shaped in its cross section; such that when said attachment means 112 are in their closed position, they function as a mechanical clamp which in conjunction with its corresponding channel cover at least 270° approximately of the tube external perimeter 120 housed in said channel, thereby impeding in the entire plate the free movement of each one of the tubes 120 and a large contact surface 113 is generated for heat conduction between the plate and each one of the tubes 120 , provided that such components make full contact without using welding.
- plate 110 With the tubes secured is observed in FIG. 3 , including a folding 140 at a determined distance, through its cross section at an angle of about 180°, forming a “coil” shape structure, wherein the minimum spacing distance between segments of the plate located at each side of said folding is at least of 20 mm. More specifically, it is preferred that said spacing distance be between 20 mm to 30 mm, thereby obtaining a compact exchanger, with a large area of heat exchange, allowing a free passage of air therethrough, and preventing mostly the adhesion and accumulation of dust, rubbish, or grime on its surface. Therefore, the exchanger is suitable to be used as a forced air condenser in commercial and/or domestic refrigeration equipments, such as food and beverage refrigerators and freezers.
- a heat exchanger 100 ′ is shown with an arrangement in “snail” shape, in which the plate 110 ′ with secured tubes, includes every determined distance, a folding 140 ′ through its cross section at an angle of approximately 90°, thus forming a “coil” or “snail” shape structure, whose walls are spaced each other a minimum distance of at least 20 mm, preferably such a spacing distance is from 20 mm to 30 mm, achieving a compact structure, of a large area of heat exchange, in which dust, grime and rubbish that might be adhered, does not obstruct air circulation between exchanger walls, being suitable to be used as a forced air condenser in commercial and/or domestic refrigeration systems.
- both the plate 110 and 110 ′ and tubes 120 and 120 ′ are made of iron, galvanized iron, aluminum, copper or the like.
- a heat exchanger 200 of the plate-tube type not requiring maintenance is shown, constructed in accordance to a first particularly preferred embodiment of the present invention, which comprises in general: a plurality of extruded profile plates 210 joined to each other, each one including a plurality of channels 211 running parallel along the plate; and, a plurality of tubes 220 housed and secured in said channels 211 , thus forming a circuit for the circulation of a heating fluid, a refrigeration fluid or a means of heating.
- the extruded profile plates 210 include integrally attachment means 212 associated to each channel, such as shown in FIG.
- said extruded profile plates 210 include integrally in their ends parallel to the channels, coupling means 214 , to be firmly joined to each other, without using welding. All of the above mentioned, may be observed in FIGS. 8 and 9 .
- attachment means 212 in the open position of such attachment means 212 , these are extended from both sides of its corresponding channel, forming therewith a “U” shape housing in cross section, and where such attachment means 212 are in its closed position, they work as a mechanical clamp which along with said channel, cover at least 270° of the external perimeter of tube 220 housed in the channel, thereby impeding in each one of the plates free movement of tubes and a large contact surface 213 is generated for heat conduction between tubes and plates, provided that such components make full contact without using welding, as may be seen in FIGS. 9 and 10 .
- the plate its surface may be flat or wavy, being preferred to use a wavy surface plate, which allows increasing the effective area of heat transfer, compared to a flat plate.
- the coupling means 214 are located at the plate ends parallel to channels 111 , and are preferably of the “male-female” type. Specifically, when it is desired to join two extruded profile plates 210 to each other, the male end of one of them is introduced into the female end of the other, which closes thereafter by means of pressure, thus achieving to firmly join two or more extruded profile plates 210 without using welding, which also allows a contact surface to exist for the heat conduction between plates, such as may be observed clearly in FIGS. 11 and 11 A.
- exchangers 200 and 200 ′ of this first embodiment maintain such minimal spacing distance between walls formed by the plate, which is alt least 20 mm, more preferably between 20 mm to 30 mm.
- its principal application is as forced air condensers used in domestic and commercial refrigeration equipments.
- the plate is made preferably of aluminum, provided that such material is easy to handle under the extrusion processes known in the prior art.
- the tubes may be manufactured in iron, copper or aluminum.
- a plate-tube type heat exchanger 300 not requiring maintenance, constructed in accordance to a second preferred embodiment of the present invention is shown, generally comprising: a plurality of extruded profile plates 310 joined to each other, each one including integrally a plurality of tubes or ducts 311 , running parallel along the plate, which are interconnected in their ends by connection fixtures 320 , forming a circuit for the circulation of a heating fluid, a refrigeration fluid or a means of heating 314 as to firmly join two plates to each other, without using welding, as shown in FIG. 14 .
- extruded profile plate used in this second embodiment is somewhat similar to plate 210 above described, whose surface may be flat or wavy, being preferred to use a wavy surface plate, taking advantage at the heat transfer area compared to a flat plate.
- a plurality of nervures or fines 315 is preferably included as to increase the primary contact surface between the heat exchange means and tubes 311 integrally joined to the plate.
- coupling means are similar to those previously described for plates 210 of the first embodiment, that is, are of male-female type and are located in the plate ends which are parallel to channels. Said coupling means allow to firmly join two or more plates to each other, without using welding, such as shown in FIGS. 16 and 16 A.
- connection fixtures 320 of different configurations, such as straight tubes, or U-shaped tubes, which are introduced in tubes 311 integrated to the plate and secured thereto in order to form serial and parallel circuits for the heating or refrigeration fluid or heating means.
- plates may be folded in order to obtain configurations shown in FIGS. 13 and 18 , “coil” shape configurations and “snail ” shape configurations, respectively, whose characteristics have been previously widely mentioned, including their manufacturing materials.
Abstract
A plate-tube type heat exchanger not requiring maintenance is described, comprising: a plate with a plurality of channels running parallel along thereof; and, a plurality of tubes housed and secured to said channels, thus forming a circuit for the circulation of a heating fluid, a cooling fluid or a means of heating; the plate includes integrally attachment means associated to each channel, which in their closed position, cover along with its corresponding channel, almost the entire tube external perimeter housing in said channel, thereby securing each of the tubes to the whole plate, without the use of welding and a large contact surface is achieved for the heat conduction between the plate and each one of the tubes.
Description
- The present application is a division of co-pending parent application Ser. No. 10/482,032, filed Jun. 7, 2004, itself a national phase of a PCT application PCT/MX02/00057, filed Jun. 26, 2002.
- The present invention relates to techniques employed in designing and manufacturing heat exchange equipment, and more particularly, it is related to a plate-tube type heat exchanger not requiring maintenance.
- Generally, plate-tube type heat exchangers are comprised by a plurality of tubes and plates, which are bonded to each other by mechanical fastening or tack welded in order to shape the exchanger structure.
- Particularly, such heat exchangers are used as condenser and evaporator in domestic and commercial refrigeration systems, they can also be found on water heaters by means of solar energy, air heaters including inside the tubes, an electric resistance, natural convection static condensers, forced air condensers, natural convection static evaporators and forced air evaporators.
- In spite of the widely spread use of these equipments, they have been observed as presenting some drawbacks. In first instance, it may be said that manufacturing process of these equipments is quite complex, since upon being comprised of multiple components, steps to assemble them are burdensome, such as the bonding step between tubes and plates via tack welding, in which it is necessary to bond the tubes one by one to the plates.
- Likewise, such a traditional method of binding tubes and plates is not that suitable for the equipments previously mentioned to achieve a efficient heat transfer between the environment and the heating or refrigeration fluid which is inside the tubes, particularly, because the contact surface between tubes and plates is significantly reduced, as may be seen in
FIG. 1 , showing a cross sectional cut of a “half coverage” type assembly used in plate-tube type heat exchangers of the prior art. In such an assembly, a tube is housed in a plate channel, remaining fixed and contacting directly therewith only through a welding point. - A variant of this traditional method of assembly by welding can be appreciated in
FIG. 2 , (total coverage), wherein a pair of plates similar to those inFIG. 1 are welded to each other by welding tacks, enclosing the tube between the channel thereof. This variant is neither efficient, since most of times the tube does not fit correctly the space formed by the plate channels, thus having a little direct contact between plates and tube for heat conduction. - On the other hand, there is an additional problem related to maintenance and cleaning of these equipments, specially forced air condensers which include fins, such as those used in domestic or commercial refrigeration systems. In said condensers, spacing between fins is significantly reduced, generally between 2 to 3 mm, which favors adhesion and accumulation of dust, grime and crap therebetween. Said accumulation becomes so important that in many cases, the air passage through fins may be obstructed, thereby causing reduction in condenser's heat exchange ability with the environment and consequently, the refrigeration system stops functioning and cooling properly, affecting other elements of the refrigeration system. Additionally, cleaning said dust or grime adhered to the fins is made difficult due to the space quite reduced existing between fins.
- Thus, in the state of the art, it may be found systems which intent to reduce on one hand, the assembly steps of these heat exchangers, such is the case of evaporator described in U.S. Pat. No. 2,212,912, which is formed from an extruded sheet integrally including tubes and fins. However, in order to give the evaporator a final shape, the tubes included in said plates need to be welded to a header or headers using several accessories. Similarly, when it is desired to form condensers with a higher capacity, it is necessary to weld bonding two extruded sheets or to change the size of extrusion die used to manufacture said sheets, thus increasing manufacturing costs.
- On the other hand, the European Patent No. 0157370, is directed to a panel for an evaporator or condenser heat exchange, said panel is also formed from an extruded sheet which includes a plurality of oval-shape grooves in cross section; inserting a tube in each of said grooves, said tube undergoes a plastic deformation at its circular wall to refill and to fit the oval contour of the groove walls, thus remaining fixed inside, reason why it is not necessary to use welding in order to bind tubes to the extruded sheet. However, when it is desired to bind two panels to form a larger condenser, this document only provides the use of a piping to connect both panels, without mentioning the existence of a direct and firm bonding therebetween; this lack does not allow to manipulate such panels together so as to form different condenser or evaporator configurations and arrangements.
- Finally, both documents from the prior art, do not consider among its objects to form a heat exchanger, on which said problems regarding adhesion, accumulation, and dust and grime cleaning between its components are minimized, which as mentioned above, decrease the capacity of equipment performance.
- An additional prior art document is U.S. Pat. No. 2,732,615, related to a method for securing a tube to a metal plate, whereby the plate is deformed to form a channel, and further to the placement of a tube in said channel, pressing the plate against the tube in order to deform it and secure it. This document does not show how to join two or more plates in order to form a tridimensional heat exchanger, neither it indicates the employment of alternative extruded plates.
- Accordingly, it has been sought to suppress the drawbacks of the tube-plate-type heat exchangers from the current art, and to provide a tube-plate-type heat exchanger not requiring maintenance, of a very simple and convenient construction, which allows to reduce the number of components and work used during its manufactures, thus eliminating the use of welding to join the tubes and plates, or to join two or more plates to each other, in which cleaning of dust and grime that may be adhered and accumulated between its components is easy.
- Having in mind the prior art drawbacks, it is an object of the present invention to provide a tube-plate-type heat exchanger not requiring maintenance, involving a single assembly process during its manufacturing.
- An additional object of the present invention, is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein there is a large contact surface between tubes and plates.
- A further object of the present invention, is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein welding to firmly join tubes to plates is not used.
- Yet another object of the present invention, is to provide a tube-plate-type heat exchanger not requiring maintenance, wherein two or more plates can be firmly joined to each other, without the use of welding.
- It is even a further object of the present invention, to provide a tube-plate-type heat exchanger not requiring maintenance, wherein cleaning of dust and grime that may be adhered between its components is easy.
- The novel features of the present invention are set forth with particularity in the appended claims. The invention itself, however, both for its organization and for its operating method, together with further objects and advantages of the invention, will be best understood by reference to the following description of specific embodiments, when taken in conjunction with the accompanying drawings, in which:
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FIG. 1 is a cross sectional view of a “half coverage” assembly, used in the tube-plate-type heat exchangers of the prior art. -
FIG. 2 is a cross sectional view of a “total coverage” assembly, used in the tube-plate-type heat exchangers of the prior art. -
FIG. 3 is a top perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with the principles of the present invention. -
FIG. 4 is a partial cross sectional view of the plate of the tube-plate-type heat exchanger inFIG. 3 , which includes a tube housed and secured in one of the channels thereof. -
FIG. 5 is a top perspective view of the plate with the tube housed and secured, shown inFIG. 4 . -
FIG. 6 is a top perspective view of a second configuration that may adopt the tube-plate-type heat exchanger of the present invention. -
FIG. 7 is a top perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with a first alternative embodiment of the present invention. -
FIG. 8 is a cross sectional view of an extruded profile plate of the heat exchanger shown inFIG. 7 . -
FIG. 9 is a cross sectional view of the extruded profile plate shown inFIG. 8 , including tubes housed and secured in the plate channels. -
FIG. 10 is a top perspective view of the extruded profile plate inFIG. 9 . -
FIGS. 11 and 11 A, are cross sectional views for showing the assembly between two extruded profile plates with tubes housed and secured. -
FIG. 12 is a perspective view of a second configuration that may adopt the embodiment shown inFIG. 7 . -
FIG. 13 is a perspective view of a tube-plate-type heat exchanger not requiring maintenance, constructed in accordance with a second alternative embodiment of the present invention. -
FIG. 14 is a cross sectional view of one of the extruded profile plate of the heat exchanger shown inFIG. 13 . -
FIG. 15 shows a top perspective view of the plate illustrated inFIG. 14 . -
FIGS. 16 and 16 A, are cross sectional views for showing the assembly between two extruded profile plates, as shown inFIG. 14 . -
FIGS. 17 and 17 A, are exploded views showing the connection of piping and/or accessories to the extruded profile plate shown inFIG. 15 . -
FIG. 18 shows a top perspective view of a second configuration that may adopt the alternative embodiment shown inFIG. 13 . - Referring in detail to the accompanying drawings, in
FIG. 1 is shown a “half coverage”-type assembly 10 used in plate-tube type heat exchangers of the prior art. In said assembly, atube 11 is housed in thechannel 14 of aplate 12, remaining fixed and making a direct contact to it only through awelding point 13. - In this sense, in
FIG. 2 a “total coverage” type assembly used in the prior art is shown. In such assembly, a pair ofplates 12′ are welded each other viawelding points 13′, enclosingtube 11′ betweenchannels 14′ thereof. However, in many cases, thetube 11′ does not fit suitably the space formed byplate channels 14′, thus having a little direct contact between plates and tube for heat conduction. - On the other hand, specific reference is now made to
FIG. 3 , in which a plate-tubetype heat exchanger 100 not requiring maintenance is shown, as constructed according to a particularly specific embodiment of the present invention, which must be considered as illustrative rather than limitative. - In general terms, the plate-tube
type heat exchanger 100 comprises: aplate 110 with a plurality ofchannels 111 running parallel along thereof; and, a plurality oftubes 120 housed and secured to saidchannels 111, thus forming a circuit for the circulation of a heating fluid, a cooling fluid or a means of heating.Plate 110 includes integrally attachment means 112 associated to each channel, as shown inFIG. 4 ; which in their closed position, cover along with its corresponding channel, almost the entire tube external perimeter housing in said channel, thereby securing each of thetubes 120 to the whole plate, without the use of welding and at the same time, alarge contact surface 113 is achieved for the heat conduction betweenplate 110 and each one of thetubes 120, as can be seen inFIGS. 4 and 5 . - On this respect, the plurality of attachment means 112, are preferably longitudinal plates from the same plate formed by mechanical means, and extending from both sides of each one of the
channels 111. In this embodiment,channels 111 are preferably semicircular or “C”-shaped in its cross section; such that when said attachment means 112 are in their closed position, they function as a mechanical clamp which in conjunction with its corresponding channel cover at least 270° approximately of the tubeexternal perimeter 120 housed in said channel, thereby impeding in the entire plate the free movement of each one of thetubes 120 and alarge contact surface 113 is generated for heat conduction between the plate and each one of thetubes 120, provided that such components make full contact without using welding. - This particular form of attachment between tubes and the plate eliminating the use of welding, allows the construction of heat exchangers of different configurations, such as the “coil” shape structure shown in
FIG. 3 or the “snail” shape structure ofFIG. 6 . - Particularly,
plate 110 With the tubes secured is observed inFIG. 3 , including afolding 140 at a determined distance, through its cross section at an angle of about 180°, forming a “coil” shape structure, wherein the minimum spacing distance between segments of the plate located at each side of said folding is at least of 20 mm. More specifically, it is preferred that said spacing distance be between 20 mm to 30 mm, thereby obtaining a compact exchanger, with a large area of heat exchange, allowing a free passage of air therethrough, and preventing mostly the adhesion and accumulation of dust, rubbish, or grime on its surface. Therefore, the exchanger is suitable to be used as a forced air condenser in commercial and/or domestic refrigeration equipments, such as food and beverage refrigerators and freezers. - In
FIG. 6 , aheat exchanger 100′ is shown with an arrangement in “snail” shape, in which theplate 110′ with secured tubes, includes every determined distance, a folding 140′ through its cross section at an angle of approximately 90°, thus forming a “coil” or “snail” shape structure, whose walls are spaced each other a minimum distance of at least 20 mm, preferably such a spacing distance is from 20 mm to 30 mm, achieving a compact structure, of a large area of heat exchange, in which dust, grime and rubbish that might be adhered, does not obstruct air circulation between exchanger walls, being suitable to be used as a forced air condenser in commercial and/or domestic refrigeration systems. - Finally, it is important to establish that in
heat exchangers plate tubes - Referring now particularly
FIG. 7 , aheat exchanger 200 of the plate-tube type not requiring maintenance is shown, constructed in accordance to a first particularly preferred embodiment of the present invention, which comprises in general: a plurality of extrudedprofile plates 210 joined to each other, each one including a plurality ofchannels 211 running parallel along the plate; and, a plurality oftubes 220 housed and secured in saidchannels 211, thus forming a circuit for the circulation of a heating fluid, a refrigeration fluid or a means of heating. The extrudedprofile plates 210 include integrally attachment means 212 associated to each channel, such as shown inFIG. 8 , which in their closed position, cover together with its corresponding channel almost fully the external surface of tube housed in said channel; thereby securing each one of thetubes 120 to each one of saidplates 210, without the use of welding and at the same time, alarge contact surface 213 is generated for the heat conduction betweenplates 210 and each one of thetubes 220. Likewise, said extrudedprofile plates 210 include integrally in their ends parallel to the channels, coupling means 214, to be firmly joined to each other, without using welding. All of the above mentioned, may be observed inFIGS. 8 and 9 . - Additionally, it may be said that in the open position of such attachment means 212, these are extended from both sides of its corresponding channel, forming therewith a “U” shape housing in cross section, and where such attachment means 212 are in its closed position, they work as a mechanical clamp which along with said channel, cover at least 270° of the external perimeter of
tube 220 housed in the channel, thereby impeding in each one of the plates free movement of tubes and alarge contact surface 213 is generated for heat conduction between tubes and plates, provided that such components make full contact without using welding, as may be seen inFIGS. 9 and 10 . - Referring to the plate, its surface may be flat or wavy, being preferred to use a wavy surface plate, which allows increasing the effective area of heat transfer, compared to a flat plate.
- With respect to the coupling means 214, it may be mentioned that they are located at the plate ends parallel to
channels 111, and are preferably of the “male-female” type. Specifically, when it is desired to join twoextruded profile plates 210 to each other, the male end of one of them is introduced into the female end of the other, which closes thereafter by means of pressure, thus achieving to firmly join two or moreextruded profile plates 210 without using welding, which also allows a contact surface to exist for the heat conduction between plates, such as may be observed clearly inFIGS. 11 and 11 A. - This particular way of attachment between tubes and plates by attachment means 212, as well as the easiness to join two or more extruded profile plates by such coupling means 214, which eliminate the use of welding, allow to build heat exchangers of very different configurations and sizes, such as those shown in
FIGS. 7 and 12 , both configurations presenting most of the characteristics mentioned for the exchangers ofFIGS. 3 and 7 previously described. Specially,exchangers - Concerning the manufacturing materials, it may be mentioned that the plate is made preferably of aluminum, provided that such material is easy to handle under the extrusion processes known in the prior art. On the other hand, the tubes may be manufactured in iron, copper or aluminum.
- Additionally, referring particularly to
FIG. 13 , a plate-tubetype heat exchanger 300 not requiring maintenance, constructed in accordance to a second preferred embodiment of the present invention is shown, generally comprising: a plurality of extrudedprofile plates 310 joined to each other, each one including integrally a plurality of tubes orducts 311, running parallel along the plate, which are interconnected in their ends byconnection fixtures 320, forming a circuit for the circulation of a heating fluid, a refrigeration fluid or a means ofheating 314 as to firmly join two plates to each other, without using welding, as shown inFIG. 14 . - In such a figure, as well as in
FIG. 15 , it may be seen that extruded profile plate used in this second embodiment is somewhat similar toplate 210 above described, whose surface may be flat or wavy, being preferred to use a wavy surface plate, taking advantage at the heat transfer area compared to a flat plate. In this sense, at the internal face of each one of thetubes 311, a plurality of nervures orfines 315 is preferably included as to increase the primary contact surface between the heat exchange means andtubes 311 integrally joined to the plate. - On the other hand, it is shown that coupling means are similar to those previously described for
plates 210 of the first embodiment, that is, are of male-female type and are located in the plate ends which are parallel to channels. Said coupling means allow to firmly join two or more plates to each other, without using welding, such as shown inFIGS. 16 and 16 A. - Referring now to
FIGS. 17 and 17 A, it may be appreciated that in the plate ends 310, tubes integrally included therein, may be interconnected to each other byconnection fixtures 320 of different configurations, such as straight tubes, or U-shaped tubes, which are introduced intubes 311 integrated to the plate and secured thereto in order to form serial and parallel circuits for the heating or refrigeration fluid or heating means. - Once said
tubes 311 have been interconnected, plates may be folded in order to obtain configurations shown inFIGS. 13 and 18 , “coil” shape configurations and “snail ” shape configurations, respectively, whose characteristics have been previously widely mentioned, including their manufacturing materials. - Finally, it should be noted that time and efforts required to manufacture the heat exchangers of the present invention, is much lesser compared to those known from the prior art, since they essentially include only plate and tubes of easy assembly.
- Even though in the foregoing description certain embodiments of the present invention are illustrated and described, emphasis should be made in that numerous modifications are possible to such embodiments without departing from the true scope thereof, such as varying the number of extruded profile plates, number of channels or tubes included therein, or how to fold the plate in order to obtain configurations other than those previously mentioned, keeping the minimum spacing distance, thus preventing fouling problems. The present invention, therefore, should not be restricted except for that required by the prior art and by the appended claims.
Claims (10)
1. A plate-tube type heat exchanger comprising:
a plurality of extruded profile flat or wavy plates, each one including integrally a plurality of tubes or ducts, running parallel along the plate, which are interconnected in their ends by connection fixtures, forming a circuit for the circulation of a heating fluid, a refrigeration fluid or heating means, wherein the extruded profile plates include integrally at their ends parallel to the channels, coupling means to firmly join two plates to each other, without using welding, in order to form a heat exchanger not requiring maintenance.
2. A plate-tube type heat exchanger according to claim 1 , wherein at the internal face of each one of the tubes integrated to the plates, a plurality of nervures or fines is included.
3. A plate-tube type heat exchanger according to claim 1 , wherein said connection fixtures are straight tubes, or U-shaped tubes.
4. A plate-tube type heat exchanger according to claim 1 , wherein the coupling means are of the male-female type.
5. A plate-tube type heat exchanger according to claim 4 , wherein when it is desired to join two extruded profile plates to each other, the male end of one of them is introduced into the female end of the other, which closes thereafter by means of pressure, thus achieving to firmly join two or more extruded profile plates without using welding, thus generating a surface for the heat conduction between plates.
6. A plate-tube type heat exchanger according to claim 5 , wherein the plates joined to each other include a folding at a determined length, through its cross-section at an angle of about 180°, forming a coil shape structure, wherein the minimum spacing distance between segments of the plates located at each side of said folding is at least 20 mm, employing optionally between 20 mm to 30 mm.
7. A plate-tube type heat exchanger according to claim 6 , wherein the structure of said heat exchanger allows the same to be used as a forced air condenser in commercial and/or domestic refrigeration equipments, in which dust or grime is not accumulated allowing a free passage of air.
8. A plate-tube type heat exchanger according to claim 5 , wherein the plates joined to each other, include at every determined length, a folding through its cross-section at an angle of approximately 90°, thus forming a coil or snail shape structure, whose walls are spaced each other a minimum distance of at least 20 mm, optionally such a spacing distance is from 20 mm to 30 mm.
9. A plate-tube type heat exchanger according to claim 8 , wherein the structure of said heat exchanger allows the same to be used as a forced air condenser in commercial and/or domestic refrigeration equipments, in which dust or grime is not accumulated allowing a free passage of air.
10. A plate-tube type heat exchanger according to claim 9 , wherein the extruded plate including tubes is manufactured from aluminum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/327,421 US20060108109A1 (en) | 2001-05-01 | 2006-01-09 | Plate-tube type heat exchanger |
Applications Claiming Priority (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MXPA01000047 MXPA01000047A (en) | 1998-07-06 | 2001-05-01 | An in-line method for determining the residue content of an isocyanate and apparatus useful therefor |
MX006606 | 2001-06-26 | ||
MXPA01006606 MXPA01006606A (en) | 2001-06-26 | 2001-06-26 | Tube plate type heat exchanger. |
MX010047 | 2001-10-05 | ||
MXPA02000919 MXPA02000919A (en) | 2002-01-25 | 2002-01-25 | Maintenance-free, tube-plate-type heat exchanger built with an extruded aluminum tubular profile. |
MX000919 | 2002-01-25 | ||
PCT/MX2002/000057 WO2003001135A1 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
US10/482,032 US7140425B2 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
US11/327,421 US20060108109A1 (en) | 2001-05-01 | 2006-01-09 | Plate-tube type heat exchanger |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/482,032 Division US7140425B2 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
PCT/MX2002/000057 Division WO2003001135A1 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060108109A1 true US20060108109A1 (en) | 2006-05-25 |
Family
ID=36459892
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/482,032 Expired - Fee Related US7140425B2 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
US11/327,421 Abandoned US20060108109A1 (en) | 2001-05-01 | 2006-01-09 | Plate-tube type heat exchanger |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/482,032 Expired - Fee Related US7140425B2 (en) | 2001-05-01 | 2002-06-26 | Plate-tube type heat exchanger |
Country Status (8)
Country | Link |
---|---|
US (2) | US7140425B2 (en) |
EP (1) | EP1411314B1 (en) |
CN (1) | CN1297795C (en) |
AT (1) | ATE352017T1 (en) |
BR (1) | BR0211048A (en) |
CA (1) | CA2451560A1 (en) |
DE (1) | DE60217680D1 (en) |
WO (1) | WO2003001135A1 (en) |
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US20110056666A1 (en) * | 2008-05-09 | 2011-03-10 | Gianfranco Bonomi | Modular panel for the formation of systems for ambient cooling or heating |
US20100116466A1 (en) * | 2008-11-07 | 2010-05-13 | Jerzy Hawranek | Axial Heat Exchanger for Regulating the Temperature and Air Comfort in an Indoor Space |
US9175893B2 (en) * | 2008-11-10 | 2015-11-03 | General Electric Company | Refrigerator |
US20100242526A1 (en) * | 2008-11-10 | 2010-09-30 | Brent Alden Junge | Refrigerator |
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US11112182B2 (en) * | 2016-10-07 | 2021-09-07 | Thomas Euler-Rolle | Heat exchanger with adjustable guiding elements between tubes |
Also Published As
Publication number | Publication date |
---|---|
BR0211048A (en) | 2004-07-20 |
EP1411314A1 (en) | 2004-04-21 |
DE60217680D1 (en) | 2007-03-08 |
EP1411314B1 (en) | 2007-01-17 |
WO2003001135A1 (en) | 2003-01-03 |
US7140425B2 (en) | 2006-11-28 |
CA2451560A1 (en) | 2003-01-03 |
ATE352017T1 (en) | 2007-02-15 |
US20040256093A1 (en) | 2004-12-23 |
CN1520509A (en) | 2004-08-11 |
CN1297795C (en) | 2007-01-31 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |