EP0209868A2 - Réchauffeur électrique pour réservoir de liquides - Google Patents

Réchauffeur électrique pour réservoir de liquides Download PDF

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Publication number
EP0209868A2
EP0209868A2 EP86109928A EP86109928A EP0209868A2 EP 0209868 A2 EP0209868 A2 EP 0209868A2 EP 86109928 A EP86109928 A EP 86109928A EP 86109928 A EP86109928 A EP 86109928A EP 0209868 A2 EP0209868 A2 EP 0209868A2
Authority
EP
European Patent Office
Prior art keywords
heating
heater
flow
container
wall
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.)
Withdrawn
Application number
EP86109928A
Other languages
German (de)
English (en)
Other versions
EP0209868A3 (fr
Inventor
Hermann Knauss
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer GmbH
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 EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Publication of EP0209868A2 publication Critical patent/EP0209868A2/fr
Publication of EP0209868A3 publication Critical patent/EP0209868A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0042—Cleaning arrangements
    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/185—Water-storage heaters using electric energy supply

Definitions

  • the invention relates to an electric heater for liquid containers, in particular for hot water devices, with at least one tubular heater.
  • the radiator is generally assigned to the container in such a way that it heats the standing liquid therein until the desired temperature is reached.
  • Quantities of solid matter in the form of lime which deposits on the inside of the container and which both leads to a further deterioration in the efficiency and can also lead to cross-sectional constrictions which hinder the flow of the liquid.
  • the cleaning of such containers for the purpose of removing the solids is usually very complicated and time-consuming.
  • the invention has for its object to provide a dielectric heating for liquid containers, which ensures an improved efficiency in a simple manner by continuous separation of solids.
  • electrical heating of the type mentioned at the outset is characterized according to the invention by a flow heater which is connected to the container on the input and output sides and is heated by the tubular heating element and which has at least one lower collecting space for solids separation which can be emptied through a large opening.
  • a flow heater which is connected to the container on the input and output sides and is heated by the tubular heating element and which has at least one lower collecting space for solids separation which can be emptied through a large opening.
  • the continuous-flow heater has at least one flow heating channel which is heated by the tubular heating element from at least one side facing away from its side exposed to liquid, in particular from the outside.
  • the tubular heating element or the tubular heating element does not come into direct contact with liquid, which in particular counteracts local overheating and ensures rapid heat transfer from the tubular heating element to the liquid, because the tubular heating element heats the wall of the heating duct over a large area and the liquid flows along this wall.
  • the surfaces which come into contact with the liquid, in particular the liquid-carrying surfaces of the heating duct can also be made very smooth and even, as a result of which the tendency to solid deposits is significantly reduced.
  • thermosiphon effect of the instantaneous water heater can be achieved, for example, in a simple manner in that the input of the instantaneous water heater, for example directly from the container, in particular of the heating duct, is lower than the output, which also expediently opens directly into the container.
  • the inlet and the outlet can lie vertically one above the other or the outlet can be provided laterally offset from the vertical to the inlet, in both cases it is expedient to provide flow paths within the flow heater that are as straight as possible between the inlet and the outlet.
  • the angle of inclination can vary with the viscosity of the one to be heated Liquid can be adjusted so that this angle of inclination can be chosen flatter with lower viscosity.
  • a particularly compact and with respect to the Wirkun g s-grades even more improved embodiment of the heating results when the water heater at least partially integrated into the interior of container, in particular input and output side is set as a shaft to the container bottom.
  • the instantaneous water heater forms a closed structural unit with the container and there are very short flow paths between the instantaneous water heater and the container.
  • the flow heater has a downflow channel on the inlet side, via which the respectively cooler liquid can flow directly from the container into the flow heater.
  • the case flow duct is preferably at least partially into the, ascending flow direction-heating channel, and / or about the same axis, so that the liquid on the We g from the container to the heating zone of the flow heater no further cooling is subjected to the heating channel and results in a very space-saving design of the water heater.
  • a very favorable flow behavior of the liquid can be achieved in that the upper end of the downflow channel, in particular above the container bottom, is provided higher than the outlet opening of the continuous-flow heater, in particular at the level of the container bottom, so that despite almost any container . form a favorable circulation flow is achieved within the container.
  • At least one flow guide element pointing away from the inlet flow of the downflow channel is provided for the outlet flow of the instantaneous water heater, which is preferably formed by the funnel-like widened end of the downflow channel that covers the outlet opening of the heating channel. If the downdraft duct and the heating duct are arranged in the same axis as the flow guide member or the outlet opening lying inside the container, the heated liquid coming from the flow heater is directed into the container away from the central axis of the flow guide member, while the liquid flowing to the flow heater is concentrated on an area immediately around this central axis.
  • existing containers for example burner-heated hot water boilers
  • the instantaneous water heater can generally be converted well if the instantaneous water heater is designed for connection to the outside of the container and preferably for connection to an upright container wall lying on the input and output sides transversely to the heating duct Has connection openings.
  • the instantaneous water heater can be connected to the container in an electrically isolated or galvanically isolated manner, so that problems due to electrolysis are hardly to be feared.
  • this can be achieved, for example, by providing pieces of tubing made of non-conductive material, for example plastic, in the liquid-carrying connection connections as intermediate members are.
  • the connection connections between the instantaneous water heater and the container can be designed in such a way that the instantaneous water heater is carried exclusively by these connection connections and therefore requires no further support or fastening.
  • two or more separate, in particular identical and / or parallel, heating ducts emanate from the collecting space and preferably open into a mixing housing before the outlet of the instantaneous water heater, in particular at its opposite the entry of the heating ducts Side is provided with a closable access opening, so that a direct inspection and cleaning of the interior of the heating channels is easily possible.
  • a structurally simple design of the heating can be achieved in that the heating duct, which is ring-shaped in particular in cross section, and / or the downflow duct is each formed by at least one tube.
  • tubes in particular cylindrical tubes
  • tubes also offers the possibility of attaching the tubular heater very easily in a heat-conducting connection.
  • the collecting space or the instantaneous water heater so that the collecting space through the upper, large-area opening of the instantaneous water heater, ie is accessible for emptying, for example, through the downdraft duct.
  • emptying is much easier if the collecting space has a bottom cover and / or is formed by a pot or the like which can be removed from the water heater, so that the collecting space can be emptied from below in a simple manner. If a gate valve or the like is provided in each line connection of the instantaneous water heater to the container, the collecting space can be cleaned at any time after the line connection or line connections have been emptied, regardless of the container being emptied.
  • At least one receiving tube for the pull-out arrangement of the sensor of a temperature controller or the like is advantageously arranged adjacent to the tubular heater and / or in the liquid flow path in the continuous-flow heater.
  • the temperature is monitored by means of the sensor, not in the container, but in or on the water heater, which further simplifies the maintenance and assembly of the electrical heating.
  • the receiving tube for the temperature sensor is expediently soldered adjacent to the tubular heating element on the latter and / or on the wall of the heating duct or fastened with clamps surrounding it in a heat-conducting manner.
  • the inventive construction is except for hot water boilers and boiler particularly well as a heater for washing machines, dishwashers ud g l .. Furthermore, with the inventive heating liquids other than water, for example, Frying fats are heated by fryers; In the case of deep fryers, too, the separate arrangement of a continuous-flow heater results in simple cleaning of the deep-fryer container and simple separation of the solids resulting from deep-frying.
  • the heating 1 according to FIGS. 1-3 is assigned to a container 2, for example a hot water boiler, which is provided with inlet and outlet lines, not shown, for the liquid to be heated.
  • the container 2 is formed essentially symmetrically to a vertical central axis 3, the heating 1 as a whole also lying in this central axis 3 with respect to its central axis.
  • the heating 1 is arranged on the bottom 4 of the container 2 in the region of an opening 5 of this base 4 and partially projects through the central, for example circular opening 5 into the interior of the container 6.
  • the heating 1 has a vertical heating channel 7 with a circular cross section, which is delimited radially on the outside by a tubular wall 8 and radially on the inside by a tubular wall 9 which is axially aligned with the wall 8.
  • the wall 9 encloses or delimits
  • a falling-flow duct 10 which lies in the heating duct 7 and is separated from it only by the wall 9, the lower end of which, approximately in the plane of the lower end of the wall 8, lies at the level of the circular liquid inlet 11 of the heating duct 7.
  • the tubular wall 8 has at the upper end a flange 12 for sealed attachment to the underside of the container bottom 4, the width of the opening 5 being at least as large as the largest width of the heating channel 7.
  • the upper end of the heating channel 7 lying at the level of this flange 12 forms its circular liquid outlet 13 opening directly into the container 6.
  • the end of the wall 9 or the downdraft duct 10 is slightly funnel-like above the liquid outlet 13 to a width that is greater than the greatest width of the outlet 13 or of the heating duct 7 which has essentially constant cross sections over its height.
  • the upper end of the wall 9 forms, in addition to a funnel-like inlet opening for the downflow channel 10, narrowing downward in a funnel-like manner down the width of the downflow channel 10, a flow guide member lying in a ring around the central axis 3 and pointing obliquely upward in axial section, which in plan view of the heating 1 completely covered the outlet 13 of the heating duct 7.
  • the liquid stream led into the heater 1 is thus effectively separated from the liquid stream led out of the heater 1 into the container 2, such that the heated liquid leaving the heater 1 uniformly around the central axis 3 along the wall of the Container 2 guided upwards, deflected downward in the upper region of the container 2 and finally fed back to the downflow channel 10 in the circuit for further heating.
  • the outer wall 8 of the heating duct 7 is provided on its outer side 16 facing away from the liquid-loaded inner side 15, namely on the outer circumference, with an electric tubular heating element 17 which is close-fitting and thus in a good heat-conducting connection on this side 16, for example by solder-like Apply, is attached.
  • the tubular heater surrounds the wall 8 in a helical manner, it being possible for two or more helical, separately electrically connectable radiator filaments to be arranged in the manner of a multi-start filament in order to be able to operate the heater 1 with different outputs.
  • the tubular heater 17 extends essentially over the entire length of the heating duct 7 or the wall 8.
  • the collecting space 18 is formed by a pot 19, which is attached to a lower flange 20 of the wall 8 in an easily detachable but sealed manner.
  • the liquid emerging from the lower outlet opening of the downflow duct 10 lying in the plane of the inlet 11 is deflected radially outward and upward into the heating duct 7 in the collecting space 18, solids sinking into the relatively low-flow lower region of the collecting space 18 and settling on the floor deposit the collection room 18.
  • the heater 1 has a water heater 21 integrated with the container 2, which heats the container contents in the circuit.
  • the actual heating zone lies in the area of the heating duct 7, in which the flow acc. Arrow 22 is directed from the bottom up.
  • FIGS. 4 to 15 parts corresponding to one another have the same reference numerals as in FIGS. 1 to 3, but in FIGS. 4 to 6 with the index "a”, in FIGS. 7 to 10 with the index "b” in FIG 11 with the index "c", in FIG. 12 with the index "d” and in FIGS. 13 to 15 with the index "e”.
  • the container base 4a is provided with a base flange 5a, to which the tubular wall 8a delimiting the heating channel 7a on the outer circumference is fastened with its upper flange 12a.
  • the two flanges lying against one another are secured with a releasable profile ring 23 with the interposition of an annular seal 24 surrounding them.
  • the wall 8a extends over the entire height of the continuous-flow heater 21a, in such a way that it also delimits the collecting space 18a at the same time and projects downwards relative to the lower end of the wall 9a by the height of the collecting space 18a.
  • a removable bottom cover 25 is attached at the lower end of the wall 8a so that the inside the wall 8a is accessible over its entire width after removing the bottom cover 25.
  • the upper end of the wall 9a forms a plurality of fastening tabs 26, which are evenly distributed around the central axis 3a and protrude approximately radially outward and which are fastened to the inside of the container bottom 4a with bent ends. After removing the wall 8a, the outside of the wall 9a is thus very easily accessible.
  • the tubular heater 17a for the system on the associated side 16a of the wall 8a can also be flattened, for example triangular in cross section, so that there is an even better heat transfer from the tubular heater 17a to the wall 8a.
  • Adjacent to the tubular heating element 17a at least one receiving tube 27 is fastened on the same side 16a of the wall 8a in a highly heat-conducting manner, which is used for receiving the temperature sensor 28 of a temperature regulator filled, for example, with an expansion fluid.
  • a receiving tube for the temperature sensor of dry-running protection can also be provided, this receiving tube expediently being in direct heat-conducting contact with the tubular heating element.
  • FIGS. 7 to 10 show a continuous-flow heater 21b which has connection openings 29, 30 located transversely or at right angles to the direction of flow arrow 22b of a plurality of heating channels 7b for connection to the container (not shown in more detail).
  • the pot 19b delimiting the collecting space 18b has its pot opening on the underside, which is closed with a removable cover 25b.
  • three mutually parallel, in a common axial plane standing pipe pieces 8b are connected each limit a heating channel 7b and are provided on the outer circumference with a separate helical tubular heater 17b.
  • the clear distance between adjacent pipe sections 8b is smaller than their diameter.
  • the upper ends of the pipe pieces 8b and thus the heating channels 7b are connected to the bottom of a likewise pot-shaped, common mixing housing 31, the upper pot opening of which is also closed with an easily detachable cover 32.
  • the inlet connection opening 29 of the instantaneous water heater 22b is provided in a wall of the pot 19b, while the outlet connection opening 30, which is parallel to the axis and vertically above it, is provided on the associated wall of the mixing housing 31.
  • the two connection openings 29, 30 can be formed by projecting connection pieces 33, 34.
  • the instantaneous heater 21b can be subsequently connected to the outside of a container in a simple manner.
  • the heating channels 7b are easily accessible after removing the covers 25b, 32 for the purpose of cleaning or the like.
  • a common receiving tube 27b is attached for a temperature sensor serving to protect against dry-running.
  • the receiving tube 27b which is tangential to all the pipe sections 8b, lies in the region of each heating duct 7b between two turns of the associated tubular heating element 17b, which it can touch directly.
  • the temperature sensor is inserted into the receiving tube 27b, which is open at one end, so that it can be pulled out at any time and, for example, replaced.
  • a second receiving tube 35 which is in the flow path of the liquid within the flow heater 21b, namely in the upper region of the collecting space 18b.
  • the closed end of the receiving tube 35 lies within the collecting space 18b, while the other open end of the receiving tube 35, which penetrates a wall of the instantaneous water heater 21b to the outside in a sealed manner, is freely accessible on the outside of the instantaneous heater 21b.
  • the associated temperature sensor which is expediently assigned to a temperature controller, can be replaced at any time; for this purpose, the receiving tubes are also essentially straight or only slightly curved at most so that the temperature sensor can be inserted or pulled out with sufficient ease.
  • tubular heating elements 17c according to FIG. 11 can have flattened contact surfaces or be triangular in cross section.
  • the instantaneous heater 21d according to FIG. 12 is also designed for the arrangement on the outside of a container.
  • the heating duct 7d which is circular in cross section, is delimited by two coaxial, tubular walls 8d, 9d, the outer wall 8d being provided on the outside with at least one tubular heating element 17d and the inner wall 9d on the inside with at least one tubular heating element 17d, so that results in a substantially enlarged contact area for heating the liquid flowing through the heating channel 7d.
  • Such a configuration would also be conceivable in the case of the arrangement of a downdraft duct according to FIGS. 1 to 6, the wall of the downdraft duct then lying within the inner tubular heating element 17d.
  • the outer tubular heater 17d or the associated wall 8d is included a heat insulation 36 and the inner tubular heater 17d covered with a heat insulation 37.
  • the inner insulation 37 can completely fill the inner cavity of the wall 9d.
  • the inlet connection opening 29d of the continuous-flow heater 21d or the associated connection piece 33d is expediently provided on the pot 19d delimiting the collecting space 18d, which can for example be detachably screwed onto an external thread of the outer tubular wall 8d. If the inner wall 9d is also fastened to this pot 19d, it can be completely pulled out of the outer wall 8d by loosening the pot 19d, as a result of which the entire instantaneous water heater 21d can be cleaned very easily.
  • the inner wall 9e of the annular heating duct 7e which in this case deviates from the circular shape in cross section can also be arranged in a hanging manner in the outer wall 8e.
  • the upper end of the wall 9e is attached to a switch box 38 for the tubular heater 17e, which at the same time forms the upper, releasable end cover of the outer wall 8e; as a result, the inner wall 9e including the tubular heating element 17e can be pulled out of the outer wall 8e with the switch box 38 upwards.
  • tubular heating elements 17e are only provided on the inside of the inner wall 9e.
  • the pot 19a delimiting the collecting space which is shown in the removed state in FIG. 14, is detachably attached to the underside of the outer wall 8e, so that it can be emptied at any time. If the pot 19e and the switch box 38 are removed, the entire interior enclosed by the wall 8e is freely accessible for maintenance.
  • the container 2e indicated by dash-dotted lines is provided on an upright or vertical container wall 39 with two mutually parallel, essentially vertically superimposed connecting pieces, the spacing of which is adapted to the distance between the connecting pieces 33e, 34e.
  • the connecting pieces of the instantaneous water heater 21e are connected to the connecting pieces of the container 2e by means of attached connecting sleeves 40 made of rubber or the like. These connecting sleeves 40 are secured, for example, with clamps. As a result, the water heater 21e can be completely removed from the container 2e at any time.
  • a continuous-flow heater is also conceivable, the outer wall of which has a bulbous, flattened or oval shape corresponding to the wall 8e according to FIG. 15, on the outside of which at least one tubular heating element is wound, similar to the embodiment according to FIGS. 7 to 9.
  • the wall can be closed at the bottom and / or top with a removable cover corresponding to its cross-section, which has a connection piece for the supply or discharge of the liquid to be heated.
  • the wall can consist of sections assembled in its longitudinal direction, each of which carries at least one separate tubular heating element, so that the heating power of the instantaneous water heater can be increased or decreased by adding or removing such sections, which can be of identical design.
  • the sections expediently engage with one another with their end faces in a form-fitting and sealed manner, these end faces being able to be designed in such a way that they are equally suitable for the form-fitting, sealed engagement the end covers are suitable.
  • the flattened design of the instantaneous water heater results in favorable dimensions for space-saving accommodation.
  • the outer wall of the instantaneous water heater can also have a barrel shape, for example be bulged toward the center of its length, such that its cross sections are smaller in the area of its ends than in the area of the center of its length.

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  • 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)
  • Cookers (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
EP86109928A 1985-07-23 1986-07-19 Réchauffeur électrique pour réservoir de liquides Withdrawn EP0209868A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526186 1985-07-23
DE19853526186 DE3526186A1 (de) 1985-07-23 1985-07-23 Elektrische beheizung fuer fluessigkeits-behaelter

Publications (2)

Publication Number Publication Date
EP0209868A2 true EP0209868A2 (fr) 1987-01-28
EP0209868A3 EP0209868A3 (fr) 1987-11-11

Family

ID=6276432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109928A Withdrawn EP0209868A3 (fr) 1985-07-23 1986-07-19 Réchauffeur électrique pour réservoir de liquides

Country Status (6)

Country Link
US (1) US4825043A (fr)
EP (1) EP0209868A3 (fr)
JP (1) JPS6271187A (fr)
DE (1) DE3526186A1 (fr)
ES (1) ES2000717A6 (fr)
YU (1) YU130186A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834286A1 (de) * 1988-10-08 1990-04-12 Ego Elektro Blanc & Fischer Heizvorrichtung fuer fluessigkeiten
WO1995035468A1 (fr) * 1994-06-18 1995-12-28 Barry James Marsden Appareil de chauffage
CN112245968A (zh) * 2020-10-15 2021-01-22 季杨明 一种植物提取防粘壁的热回流提取浓缩器

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DE3610235A1 (de) * 1986-03-26 1987-10-01 Ego Elektro Blanc & Fischer Friteuse
GB2226116B (en) * 1988-12-16 1992-08-05 Chun Wah Kwok Water container
US5111527A (en) * 1990-03-12 1992-05-05 Gte Products Corporation Electric heater with thermistor temperature control
US5216743A (en) 1990-05-10 1993-06-01 Seitz David E Thermo-plastic heat exchanger
DE4024559A1 (de) * 1990-08-02 1992-02-06 Miele & Cie Elektrisch beheizter durchlauferhitzer fuer geschirrspuelmaschinen und waschmaschinen
US5325822A (en) * 1991-10-22 1994-07-05 Fernandez Guillermo N Electrtic, modular tankless fluids heater
US5482685A (en) * 1993-04-12 1996-01-09 Matsushita Electric Industrial Co., Ltd. Deodorizing apparatus
US20050038712A1 (en) * 2001-11-09 2005-02-17 Veeneman William J. Multi-merchant gift registry
GB2386408B (en) * 2002-03-13 2004-02-25 Triton Plc Water heater device with scale removal
SE521332C2 (sv) * 2002-04-16 2003-10-21 Styrbjoern Gaerde Automat och förfarande för hantering av försändelser
ES2239512B1 (es) 2003-06-25 2006-12-01 Bsh Ufesa Industrial S.A. Aparato calentador electrico.
JP2007127318A (ja) * 2005-11-02 2007-05-24 Nippon Thermostat Co Ltd 給湯装置
US8744252B1 (en) * 2008-03-12 2014-06-03 John Snyder Tankless hot water generator

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GB466518A (en) * 1935-12-05 1937-05-31 Santon Ltd Improvements connected with electric water heaters

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834286A1 (de) * 1988-10-08 1990-04-12 Ego Elektro Blanc & Fischer Heizvorrichtung fuer fluessigkeiten
WO1995035468A1 (fr) * 1994-06-18 1995-12-28 Barry James Marsden Appareil de chauffage
CN112245968A (zh) * 2020-10-15 2021-01-22 季杨明 一种植物提取防粘壁的热回流提取浓缩器

Also Published As

Publication number Publication date
EP0209868A3 (fr) 1987-11-11
YU130186A (en) 1988-04-30
ES2000717A6 (es) 1988-03-16
DE3526186A1 (de) 1987-02-05
JPS6271187A (ja) 1987-04-01
US4825043A (en) 1989-04-25

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