US20120321285A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20120321285A1
US20120321285A1 US13/392,178 US201013392178A US2012321285A1 US 20120321285 A1 US20120321285 A1 US 20120321285A1 US 201013392178 A US201013392178 A US 201013392178A US 2012321285 A1 US2012321285 A1 US 2012321285A1
Authority
US
United States
Prior art keywords
heat exchanger
flow channel
heating
exchanger according
profile body
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.)
Abandoned
Application number
US13/392,178
Other languages
English (en)
Inventor
Dirk Scherer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wiwa Wilhelm Wagner GmbH and Co KG
Original Assignee
Wiwa Wilhelm Wagner GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wiwa Wilhelm Wagner GmbH and Co KG filed Critical Wiwa Wilhelm Wagner GmbH and Co KG
Assigned to WIWA WILHELM WAGNER GMBH & CO. KG reassignment WIWA WILHELM WAGNER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHERER, DIRK
Publication of US20120321285A1 publication Critical patent/US20120321285A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H05B3/82—Fixedly-mounted immersion heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply

Definitions

  • the invention relates to a heat exchanger for heating flowable media, in particular high-viscosity materials, coating materials, or the like, comprising a profile body having at least one flow channel section of a flow channel of the heat exchanger and a heating device, which is arranged in the profile body, the heating device having at least two electrical heating elements.
  • Heat exchangers of this type are sufficiently known and are regularly used as a continuous flow heater for heating coating materials in the field of spraying technology.
  • the coating material is conveyed by means of a pump through the flow channel of the heat exchanger, heating of the coating material being performed through the contact thereof with heat exchanger surfaces inside the flow channel.
  • Electrical heating elements are typically used for generating the heat energy, which are arranged in a body of the heat exchanger that forms at least a section of the flow channel.
  • the heating element or elements must be arranged in the body in such a manner that uniform heating of the flow channel occurs. It is disadvantageous here in particular that the heat transfer from the heating elements to the coating material only occurs indirectly and the body, which is formed from metal, must first be heated.
  • embodiments of heat exchangers are known in which a heating element is arranged directly in the flow channel. Rapid and effective heating of the coating material is possible here, however, in the case of the comparatively small heat exchanger surface of the heating element, the danger exists of overheating of the coating material.
  • the coating material can also easily bake or accumulate on a heating element surface, which can in turn result in clogging of the flow channel.
  • a comparatively smaller temperature gradient between a flow channel inner surface and the coating material is achievable with the arrangement of the heating elements in the body, but in this case a comparatively long flow channel must be implemented to implement a required larger heat exchanger surface.
  • a more complicated channel guide or a more complex structure of the body results therefrom in a disadvantageous way, in particular since the heat exchanger is frequently used in combination with a mobile spraying device and must therefore be relatively compact in its dimensions.
  • the present invention is therefore based on the object of proposing a heat exchanger which has a simple and compact, easy-to-clean structure and nonetheless allows improved heat transfer.
  • the heat exchanger according to the invention for heating flowable media comprises a profile body having at least one flow channel section of a flow channel of the heat exchanger and a heating device arranged in the profile body, the heating device having at least two electrical heating elements, a first heating element being arranged in a heating element receptacle implemented in the profile body, and a second heating element being arranged in a sleeve element of the heating device, the sleeve element being arranged in the flow channel section implemented in the profile body in such a manner that the heating elements are sealed in relation to the flow channel.
  • the heating of the profile body using a heating element and the use of the sleeve element, which is also heated, in the flow channel section allow particularly effective heat transfer to the flowable medium, since the effectively heated heat exchanger surfaces are relatively large.
  • the flowable medium thus comes into contact with a flow channel inner surface and a sleeve element surface, which are heated by the first or the second heating element, respectively.
  • the flow channel section is implemented by a profile body, which is geometrically uniform and therefore easy to clean.
  • a profile body does not have bends or openings, in which possible accumulations could only be removed with difficulty, and is additionally simple to produce and available in arbitrary lengths.
  • the flow channel of the heat exchanger can be dimensioned as relatively short, without a heating element coming into direct contact with the medium.
  • Local overheating of the medium also can hardly occur in the flow channel section because of the uniform heat distribution via the heat exchanger surfaces implemented in this manner. The negative effects connected thereto are thus avoided in particular because the heating elements cannot come into contact with the medium.
  • the heat exchanger can advantageously comprise a plurality of profile bodies arranged in parallel. A flow rate can thus be increased or alternatively a flow channel section can be lengthened.
  • the heat exchanger can in particular be implemented so that a modular structure of the heat exchanger having a number of profile bodies suitable for the respective application is possible. Adaptation of the heat exchanger to special customer wishes or requirements is therefore easily possible without greater production expenditure.
  • the heat exchanger can also comprise a cover element and a base element, which are each arranged on profile ends of the profile body.
  • a plurality of profile bodies can be mounted between the cover element and the base element by means of the cover element and the base element.
  • the cover element and the base element can also be sealed in relation to the profile ends so that the flowable medium cannot exit from the heat exchanger in an undesired manner.
  • Attachment channels of the flow channel can also be implemented in the cover element and/or in the base element.
  • the attachment channels then do not have to be arranged in one or more profile bodies, but rather can simply be arranged on the above-mentioned elements, depending on the use requirement of the heat exchanger.
  • a plurality of connection channels can also be provided on different sides of the cover element and/or the base element for optional use.
  • the unused attachment channels can then be closed using a screw connection, for example.
  • connection channel for connecting flow channel sections is implemented in the cover element and/or in the base element. Multiple flow channel sections can thus be connected one behind another in series.
  • the number of connection channels can vary depending on the number of profile bodies used. Therefore, it is merely necessary to replace cover element and/or base element having the corresponding number of identical profile bodies to implement heat exchangers having different heating powers.
  • the sleeve element is fixedly connected to the cover element.
  • the cover element To clean the flow channel, the cover element must then merely be disassembled from the profile body, the cover element then being removed together with the sleeve element from the profile body or from the flow channel section.
  • the sleeve element surface and also the flow channel inner surface are thus easily accessible for cleaning.
  • the first heating element which is arranged in the heating element receptacle of the profile body, can preferably also be connected to the cover element in a suitable manner.
  • the heat exchanger can be produced particularly simply if the flow channel section and the heating element receptacle are implemented as passage boreholes in the profile element in the longitudinal direction of the profile element.
  • the sleeve element can implement a polygonal cross-section.
  • the sleeve element has a plurality of longitudinal grooves distributed around the periphery on its peripheral surface, in such a manner that the sleeve element forms a star-shaped cross section, a heat exchanger surface or sleeve element surface can be enlarged still further.
  • a plurality of partial channels of the flow channel section can thus also be implemented between the sleeve element and the profile body. If the sleeve element surface at least sectionally comes into contact with the flow channel inner surface, a particularly good seat of the sleeve element in the flow channel section is additionally ensured.
  • the heat exchanger can have heating elements in a ratio of two second heating elements to one first heating element.
  • the attachment device can comprise a housing, which is sealed in relation to the surroundings, having devices for the subdistribution for the electrical heating elements and control or regulating devices.
  • At least one temperature sensor can be arranged in the flow channel to implement a temperature regulation. Multiple temperature sensors can optionally be provided to ascertain a temperature differential along the flow channel. A temperature regulation can preferably be performed based on measured values of the temperature sensor using a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the flow channel itself can be implemented as meandering, for example, by flow channel sections arranged in series one after another, which are connected via connection channels.
  • a compact embodiment of the heat exchanger can thus be implemented particularly simply.
  • the heat exchanger can advantageously have an insulation device, which minimizes possible heat losses to an environment. Furthermore, the insulation device can protect operating personnel from possible burns.
  • FIG. 1 shows a first perspective view of a heat exchanger
  • FIG. 2 shows a second perspective view of the heat exchanger
  • FIG. 3 shows a cross-sectional view of the heat exchanger in a perspective view
  • FIG. 4 shows a longitudinal sectional view of the heat exchanger in a perspective view
  • FIG. 5 shows a longitudinal sectional view of the heat exchanger in a perspective view
  • FIG. 6 shows a partial longitudinal sectional view of the heat exchanger in a perspective view.
  • FIGS. 1 to 6 A consideration of FIGS. 1 to 6 together shows a heat exchanger 10 in various perspective views and sections.
  • the heat exchanger comprises two profile bodies 11 and 12 , which implement flow channel sections 13 and 14 or 15 and 16 like a passage borehole.
  • sleeve elements 17 are arranged in each of the flow channel sections, which have a star-shaped profile cross-section 18 , so that a plurality of partial channels 21 is implemented between a flow channel inner surface 19 and a sleeve element surface 20 .
  • the heat exchanger 10 comprises first heating elements 22 , which are arranged in a heating element receptacle 23 , which is implemented in the profile body 11 or 12 and is implemented like a passage borehole.
  • Second heating elements 24 are arranged in the sleeve elements 17 in sleeve element receptacles 25 , which are also implemented as a passage borehole.
  • the first heating elements 22 and second heating elements 24 are each arranged in the heating element receptacles 23 or 25 , respectively, so that a touch contact exists for particularly good heat transfer between the first heating elements 22 and the profile bodies 11 or 12 and between the second heating elements 24 and the sleeve elements 17 .
  • a sealing screw 27 is screwed into the sleeve element 17 at a lower end 26 of the sleeve element 17 in each case.
  • the heat exchanger 10 comprises a cover element 28 and a base element 29 , which are arranged on profile ends 30 to 33 of the profile bodies 11 or 12 and are fixedly screwed thereon by means of screws 34 .
  • two connection channels 35 and 36 are implemented like a transverse borehole in the base element 29 and are each closed using a screw 37 .
  • the connection channel 35 connects the flow channel sections 13 and 15 and the connection channel 36 connects the flow channel sections 14 and 16 , respectively.
  • a connection channel 38 having a screw 37 which connects the flow channel sections 13 and 14 , is also provided in the cover element 28 .
  • attachment channels 39 and 40 are implemented like a borehole in the cover element 28 , which are connected to the flow channel sections 15 or 16 .
  • Attachment screw connections 41 for attaching the heat exchanger 10 to a supply line or drain line (not shown here) of a spraying device are screwed into the attachment channels 39 and 40 .
  • a meandering implementation of a flow channel 42 results.
  • Seals 43 are arranged on the profile ends 30 to 33 to seal the cover element 28 and the base element 29 with the profile bodies 11 and 12 . Furthermore, the sleeve elements 17 are provided on their upper ends 44 with a peripheral groove 45 and a thread 46 . The sleeve elements 17 are thus fixedly screwed into the cover element 28 by means of the thread 46 .
  • the peripheral groove 45 is essentially used for improved distribution of the medium to be heated.
  • an attachment device 47 having an attachment housing 48 and an attachment terminal 49 is arranged on the cover element 28 .
  • the attachment terminal 49 is essentially used for the electrical connection of the first heating elements 22 and second heating elements 24 to a central power supply.
  • the attachment housing 48 is formed from a housing ring 50 having a housing cover 51 , which are connected to the cover element 28 so that a sealed attachment chamber 52 is formed.
  • a temperature sensor 53 is arranged in the attachment channel 39 or in the cover element 28 and a temperature sensor 54 is arranged in the profile body 12 or in the flow channel section 15 . Both temperature sensors 53 and 54 are connected to a PLC (not shown here) for regulating the temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
US13/392,178 2009-08-27 2010-08-20 Heat exchanger Abandoned US20120321285A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009038762.5 2009-08-27
DE102009038762A DE102009038762B4 (de) 2009-08-27 2009-08-27 Wärmeübertrager
PCT/EP2010/062167 WO2011023636A2 (de) 2009-08-27 2010-08-20 Wärmeübertrager

Publications (1)

Publication Number Publication Date
US20120321285A1 true US20120321285A1 (en) 2012-12-20

Family

ID=43524999

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/392,178 Abandoned US20120321285A1 (en) 2009-08-27 2010-08-20 Heat exchanger

Country Status (5)

Country Link
US (1) US20120321285A1 (de)
EP (1) EP2471339B1 (de)
DE (1) DE102009038762B4 (de)
ES (1) ES2609425T3 (de)
WO (1) WO2011023636A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104937348A (zh) * 2013-01-25 2015-09-23 瓦格纳喷涂技术有限公司 多组分系统加热器

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968346A (en) * 1973-06-01 1976-07-06 Cooksley Ralph D Method and apparatus for electrically heating a fluid
US3999190A (en) * 1975-10-22 1976-12-21 Burroughs Corporation Temperature control system for ink jet printer
US4808793A (en) * 1986-11-13 1989-02-28 Everhot Corporation Tankless electric water heater with instantaneous hot water output
US4835365A (en) * 1986-09-29 1989-05-30 Etheridge David R De-ionized fluid heater and control system
US5506931A (en) * 1994-03-09 1996-04-09 The Commonwealth Of Puerto Rico Immersion type water heating element assembly with permanently wired electrical supply
US6240250B1 (en) * 1999-06-10 2001-05-29 Byron Blanco, Jr. Compact in-line tankless double element water heater
US20050185942A1 (en) * 2004-02-24 2005-08-25 Fabrizio Edward V. Electric tankless water heater
US7088915B1 (en) * 2005-03-15 2006-08-08 Ion Tankless, Inc. Modular tankless water heater
US20060222351A1 (en) * 2003-02-12 2006-10-05 Cem Cezayirli Pre-heating contiguous in-line water heater
US20080159726A1 (en) * 2006-12-27 2008-07-03 Barkey Gmbh & Co. Kg Device for temperature controlled heating of a fluid line
US7592572B2 (en) * 2005-07-26 2009-09-22 Türk + Hillinger GmbH Compressed cartridge heater
US20090321417A1 (en) * 2007-04-20 2009-12-31 David Burns Floating insulated conductors for heating subsurface formations
US8249437B2 (en) * 2004-02-05 2012-08-21 Graco Minnesota, Inc. Hybrid heater

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2156029A1 (de) * 1971-11-11 1973-05-17 Wagner Fa Ing Josef Vorrichtung zum erhitzen von fluessigkeiten
DE3816335A1 (de) * 1988-05-13 1989-11-23 Wagner Wilhelm Wiwa Materialdurchflusserhitzer
FR2661488A1 (fr) * 1990-04-25 1991-10-31 Vulcanic Sa Echangeur de chaleur tridimensionnel a alimentation electrique.
DE4300163C1 (de) * 1993-01-07 1994-03-17 Boellhoff Verfahrenstech Elektrischer Durchlauferhitzer
DE19524683A1 (de) * 1995-07-06 1997-01-09 Polyplan Gmbh Polyurethan Masc Durchlauferhitzer
JP2003148806A (ja) * 2001-11-12 2003-05-21 Sakaguchi Dennetsu Kk 流体加熱ヒーター
DE202005017693U1 (de) * 2005-11-11 2006-02-23 Ko, Hao-Chih, Linkou Shiang Heizgerätstruktur

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968346A (en) * 1973-06-01 1976-07-06 Cooksley Ralph D Method and apparatus for electrically heating a fluid
US3999190A (en) * 1975-10-22 1976-12-21 Burroughs Corporation Temperature control system for ink jet printer
US4835365A (en) * 1986-09-29 1989-05-30 Etheridge David R De-ionized fluid heater and control system
US4808793A (en) * 1986-11-13 1989-02-28 Everhot Corporation Tankless electric water heater with instantaneous hot water output
US5506931A (en) * 1994-03-09 1996-04-09 The Commonwealth Of Puerto Rico Immersion type water heating element assembly with permanently wired electrical supply
US6240250B1 (en) * 1999-06-10 2001-05-29 Byron Blanco, Jr. Compact in-line tankless double element water heater
US20060222351A1 (en) * 2003-02-12 2006-10-05 Cem Cezayirli Pre-heating contiguous in-line water heater
US8249437B2 (en) * 2004-02-05 2012-08-21 Graco Minnesota, Inc. Hybrid heater
US20050185942A1 (en) * 2004-02-24 2005-08-25 Fabrizio Edward V. Electric tankless water heater
US7088915B1 (en) * 2005-03-15 2006-08-08 Ion Tankless, Inc. Modular tankless water heater
US7592572B2 (en) * 2005-07-26 2009-09-22 Türk + Hillinger GmbH Compressed cartridge heater
US20080159726A1 (en) * 2006-12-27 2008-07-03 Barkey Gmbh & Co. Kg Device for temperature controlled heating of a fluid line
US20090321417A1 (en) * 2007-04-20 2009-12-31 David Burns Floating insulated conductors for heating subsurface formations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104937348A (zh) * 2013-01-25 2015-09-23 瓦格纳喷涂技术有限公司 多组分系统加热器
US9156046B2 (en) 2013-01-25 2015-10-13 Wagner Spray Tech Corporation Plural component system heater

Also Published As

Publication number Publication date
EP2471339A2 (de) 2012-07-04
DE102009038762A1 (de) 2011-03-03
WO2011023636A3 (de) 2012-03-29
WO2011023636A2 (de) 2011-03-03
DE102009038762B4 (de) 2011-09-01
ES2609425T3 (es) 2017-04-20
EP2471339B1 (de) 2016-10-05
DE102009038762A8 (de) 2011-06-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WIWA WILHELM WAGNER GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHERER, DIRK;REEL/FRAME:028181/0885

Effective date: 20120314

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION