Classifications

• • 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
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
  • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/0412—Cooling or heating; Control of temperature
  • F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
  • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
  • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/04—Arrangements for sealing elements into header boxes or end plates
  • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
  • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
  • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
• • 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
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
  • F28D2021/0049—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for lubricants, e.g. oil coolers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2225/00—Reinforcing means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2275/00—Fastening; Joining
  • F28F2275/04—Fastening; Joining by brazing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
  • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
  • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
  • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples

Definitions

• the invention relates to a plate heat exchanger having openings in the plates, which are formed by supply or return ducts extending through a plate stack, said supply or return ducts being hydraulically connected to flow ducts located between the plates, and to a tube arranged coaxially in the supply or return duct, having holes in the tube wall of said tube for providing the hydraulic connection to the flow ducts.
• US 3,976, 128A discloses an evaporator which is constructed as a plate and fin heat exchanger.
• the tube was arranged in the supply duct coaxially with the holes in the tube wall of said tube.
• the performance improvement is achieved by specific positioning, proposed therein, of the holes at the circumference of the tube wall.
• the strength of the known heat exchanger cannot be improved to the extent that would be desired and also necessary at particularly high internal pressures.
• One problem addressed by the invention is to simplify the production of the plate heat exchanger, without neglecting the strength thereof.
• the tube extends through the entire stack in order to form a tie rod between a top side and an underside of the plate stack.
• the tube has a diameter corresponding to the diameter of the openings in the plates such that the tube wall is firmly connected metallurgically to at least some edges of the openings.
• at least some of the opening edges are provided with a flange bearing against the tube wall.
• top side and underside are primarily independent of their spatial arrangement, i.e. should be understood as two opposite sides of the plate stack.
• the previously provided solid annular discs can be dispensed with.
• the plate heat exchanger according to the invention has sufficient strength with respect to very high internal pressures. It is lighter than the previous heat exchangers and it has also become producible with lower costs on account of the numerous annular discs being dispensed with.
• the proposed solution can be applied in plate heat exchangers which are arranged in a housing and also in what are known as “housingless” plate heat exchangers, as is otherwise also apparent from the following description of exemplary embodiments.
• FIG. 1 shows a perspective view of a plate heat exchanger according to an embodiment of the invention, which is to be arranged in a housing (not shown).
• FIG.2 shows a longitudinal section through this plate heat exchanger.
• FIG.3 is an enlarged illustration of a tube which is located coaxially in the supply duct and in the return duct of the plate heat exchanger.
• FIGs.4A-4C contain several illustrations of differently designed tubes.
• FIG.5 is similar to FIG.1, but omits key features from FIG.1 and instead shows details which are not visible in FIG.1.
• FIG.6 is an enlarged detail view of the area indicated as IV in FIG.3.
• FIGs.7-10 show enlarged details of different opening edges which are metallurgically connected to the coaxial tube, to be more precise with the tube wall thereof.
• FIG.11 shows a plan view of a "housingless" plate heat exchanger as an outline with in each case one coaxial tube in the supply and return ducts thereof.
• FIG.12 shows a longitudinal section of a plate heat exchanger from the prior art, which has solid rings R introduced between the plates around the hole edges.
• the plate heat exchanger in the exemplary embodiments shown is an oil cooler for cooling oil, for example transmission oil, by means of a coolant, without being limited thereto.
• the plate heat exchanger according to FIGs. 1-3 and 5-10 has two openings 1 in all of the plates 2.
• the plates 2 have been stacked to form a plate stack 3 such that, by means of the openings 1, supply ducts and a return ducts extending through the plate stack 3 are formed, which both have the reference sign 10.
• the two ducts 10 are hydraulically connected to flow ducts 11 located between the plates 2. As FIG.
• FIG. 2 shows, oil flows into the supply ducts 10 (on the right), flows through the flow ducts 11 and, after corresponding cooling, passes into the return duct 10 (on the left).
• a further flow duct 11.1 is in each case located between the flow ducts 11.
• the flow ducts 11.1 are flowed through by the coolant.
• the coolant is symbolized by block arrows arranged on the left and right (FIG. 2).
• the housing (not shown) has corresponding openings (not shown) for the entry and exit of the liquid coolant.
• Fins (not illustrated) or the like are optionally provided in the flow ducts 11. Studs 13 that butt against one another or similar plate formations are provided in the flow ducts 11.1 of the exemplary embodiment.
• the studs 11 can be replaced, for example also by other fins.
• a coaxially arranged tube 4 is located in both the supply duct and the return duct 10.
• the tube 4 has holes 40 arranged in the tube wall 41 thereof.
• the holes 40 allow the mentioned hydraulic connection to the flow ducts 11 and have therefore been arranged exactly at the heights of the flow ducts 11.
• the shape of the holes 40 can vary.
• FIG. 2 shows round holes 40.
• FIGs. 3 and 4 show elongate holes 40. Further shapes and also different cross-sectional sizes are conceivable and have also been contemplated for other embodiments of the invention that are not shown.
• a brazing gap 43 has been provided to enhance the tie-rod functionality, said brazing gap 43 contributing considerably to the strength of the brazed connection because it will receive a larger quantity of braze material.
• a ring 45 of braze alloy may be necessary if the provided amount of braze is insufficient.
• a collar 80 on the upper plate 8 can contribute to increasing the strength. The collar 80 can project into the gap 43. A similar collar can be located at a corresponding hole in the lower plate 7.
• the tube 4 has a diameter corresponding to the diameter of the openings 1 in the plates 2.
• the tube wall 41 is firmly connected metallurgically, preferably brazed, to all of the edges 6 of the openings 1 in the exemplary embodiment. At least some opening edges 6 should have the connection.
• FIGs. 7-10 show partial cross-sectional views of various possible alternative design details for select embodiments of the invention. Certain less relevant details of the plate heat exchanger have been removed or simplified in order to best illustrate the details of interest. Each of FIGs. 7-10 show only half an opening edge, or half a tube 4, this being made clear by the indicated axis A. In addition, the number of flow ducts illustrated has been reduced to a single open flow duct arranged between two closed flow ducts. While most embodiments of the invention will include more of each kind of flow duct, such additional flow ducts can be provided by repeating instances of the depicted geometry, and thus do not need to be shown in order to adequately describe the invention. Additionally, those portions of the heat exchanger along the longitudinal direction between the end of the thick-walled flange and the far ends of the plates have been removed for the figures, but are as shown in FIG. 2.
• edges 6 it is highly advantageous for the edges 6 to be provided with a flange or collar 60 bearing against the tube wall 41 (FIG. 7), in order to further strengthen the metallic connection.
• a flange 60 is provided on alternating ones of the plates 2.
• the adjacent and interleaved ones of the plates 2 are provided with an opening 1 that is larger in diameter than the opening 1 provided in those plates having a flange 60.
• the flanges 60 can be metallurgically joined to the tube 4 to provide structural strength along the stack height, while other metallurgical joints between the adjacent plates are provided immediately adjacent to and radially outward of the supply and return ducts 40 in order to hydraulically separate the closed flow ducts for the oil from the open flow ducts for the liquid coolant.
• the interleaved plates 2 that are not directly bonded to the tube 4 can still be provided with a flange along the opening edge, as shown in the alternative of FIGs. 9 and 10.
• Adjacent plates 2 can be joine to one another at the flanges as shown, so that the aforementioned flange 60 is arranged between the tube wall 4 and the flange of the adjacent plate and is bonded to both, thereby further increasing the strength of the tie-rod.
• the coaxial tube 4 has a closure cap 42 or the like firmly connected metallurgically to the tube 4.
• the closure cap 42 can be a differently formed individual part (FIGs. 4A and 4B). It can also be formed in one piece with the tube 4, however, as is shown in the design according to FIG. 4C.
• FIG. 11 The outline according to FIG. 11 is intended merely to show that the proposed subject matter can also be implemented in what is known as a "housingless" plate heat exchanger of known construction.
• the plate stack 3 has second flow ducts 12 (not shown, merely indicated by means of an arrow) located between the plates 2, said second flow ducts 12 being hydraulically connected to second supply or return ducts 20 formed from second plate openings 5, wherein the tube 4 is also or only located in one of the second supply or return ducts 20, wherein the holes 40 in the tube wall 41 of said tube provide the hydraulic connection to the second flow ducts 12. Dashed circles are intended to indicate inserted tubes 4 in all supply and return ducts 10, 20.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=57853757

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Family Cites Families (22)

• 2015
  • 2015-08-08 DE DE102015010289.3A patent/DE102015010289A1/de not_active Ceased
• 2016
  • 2016-08-18 MX MX2018001598A patent/MX2018001598A/es unknown
  • 2016-08-18 EP EP16836033.7A patent/EP3349921A4/de not_active Withdrawn
  • 2016-08-18 BR BR112018002396A patent/BR112018002396A2/pt not_active Application Discontinuation
  • 2016-08-18 US US15/750,853 patent/US20180231323A1/en not_active Abandoned
  • 2016-08-18 WO PCT/US2016/047467 patent/WO2017027886A1/en not_active Ceased

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