EP0077993A1 - Storage heater - Google Patents

Storage heater Download PDF

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Publication number
EP0077993A1
EP0077993A1 EP82109632A EP82109632A EP0077993A1 EP 0077993 A1 EP0077993 A1 EP 0077993A1 EP 82109632 A EP82109632 A EP 82109632A EP 82109632 A EP82109632 A EP 82109632A EP 0077993 A1 EP0077993 A1 EP 0077993A1
Authority
EP
European Patent Office
Prior art keywords
end opening
heating element
recess
insulating layer
storage core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82109632A
Other languages
German (de)
French (fr)
Other versions
EP0077993B1 (en
Inventor
Aloys Ing.-Grad. Feldmann
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.)
Kueppersbusch AG
Kuppersbusch AG
Original Assignee
Kueppersbusch AG
Kuppersbusch AG
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 Kueppersbusch AG, Kuppersbusch AG filed Critical Kueppersbusch AG
Priority to AT82109632T priority Critical patent/ATE23739T1/en
Publication of EP0077993A1 publication Critical patent/EP0077993A1/en
Application granted granted Critical
Publication of EP0077993B1 publication Critical patent/EP0077993B1/en
Expired 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
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • 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
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/002—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release using electrical energy supply

Definitions

  • the invention relates to a heat storage furnace according to the preamble of the first claim.
  • the invention has for its object to take measures in a heat storage furnace designed according to the preamble of the first claim, by means of which an exchange of the heating element from the front is made possible with the heat insulation layer remaining largely on the storage core.
  • the part of the heat insulation layer that is adjacent to the end opening of the recess needs to be removable for the replacement of the heating element, or a slot through which the heating element is passed and the deformable material of the heat insulation layer can already suffice which is then compressed again.
  • a heat insulation layer 1 surrounds a storage core 2 made of heat-storing material.
  • the storage core 2 sits on a floor insulating brick 3 and is crossed by an inverted U-shaped discharge air duct 4.
  • In the memory core 2 there is also an essentially vertical recess 5 which is adapted to the shape of a heating element 6 inserted therein.
  • the electrical heating element 6, like the recess 5, is elongated. It is formed and bent in the longitudinal direction by approximately 90, so that there is an essentially perpendicular arrangement in the longitudinal direction.
  • the bottom end opening 7 of the cutout 5 points to the side wall 8, which is at the front during operation and is directed into the space to be heated, of a housing which overlaps the heat insulation layer on the outside.
  • the adapted connection end 9 of the heating element 6 is inserted, which closes the end opening 7.
  • the heat insulating layer arranged on the front side wall 8 of an outer housing is divided at an inclined parting line 10 in such a way that an independently manageable insulating layer part 11 is formed in the region of the end opening 7 or the connecting end 9.
  • This lower insulating layer part 11 can be removed independently of the remaining heat insulating layer 1, so that the storage core 2 can be exposed in the limited area of the end opening 7.
  • the heating element 6 can be pulled out of the recess 5 due to its arcuate design, only the lower section of the storage core 2 being exposed.
  • the insulating part 11 can of course also be limited to the immediate area of the end opening 7 if the heat radiation from the charged storage core 2 should otherwise be too great in the event of a repair.
  • a deformable heat insulation layer for example made of rock wool or Glass wool to slit the heat insulation layer in the area of the end opening 7, so that the slits can be opened in the event of a repair and the heating element 6 can be replaced.
  • the slitting can only be carried out in the event of a repair.
  • the heating element 6 preferably consists of tubular heating elements which are bent essentially in the shape of a hairpin and are additionally bent in the longitudinal direction of their legs by a total of about 90 ° in a crescent shape.
  • the heating element 6 can thus be exchanged from the front without difficulty even when the heat storage furnace is set in a niche, the exposed radiation part of the storage core 2 being able to be reduced to a minimum by the insulating part 11. This is possible because the end opening 7 only has a height that is a fraction of the radiator length.
  • the heating element can also be constructed from individual ceramic members which can be adjusted to a limited extent, on which a heating coil is wound and which form a rod-shaped arrangement which can be bent in the axial direction.
  • the heating element designed in this way can be pushed upwards under axial deflection through the insertion opening.
  • connection end 9 and the end opening 7, which is very small in height, has the essential advantage that heat radiation from the heating element 6 does not reach Thermal insulation layer 1 or up to a plate closing the end opening, but is absorbed inside the storage core 2.
  • the same also applies to the air conducted through the storage core 2.
  • the air duct can be routed separately from the heating element as a separate air path.

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)
  • Electric Stoves And Ranges (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)
  • Central Heating Systems (AREA)

Abstract

1. Thermal storage heater with a storage core (2), which is surrounded by a thermally insulating layer (1) within a housing, with at least one heating element (6) in a recess (5), which is provided in the storage core (2) and displays an end opening (7), which faces towards the front wall (8) of the housing and displays merely a fraction of the height of the storage core (2), as well as with a closure (5) for the recess, characterised thereby, that the end opening (7) is provided in the lower region of the storage core (2), that the heating element (6) just as the recess (5) is elongate and in longitudinal direction is directed upwardly in an arc through about 90 from the end opening (7), that the heating element (6) displays a terminal end (9), which is matched to the end opening (7) in the storage core (2) and inserted into the end opening (7), that the thermally insulating layer (1) is openable for the passage of the heating element (6) in the region of the end opening (7) and that the wall (8) is removable.

Description

Die Erfindung betrifft einen Wärmespeicherofen gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to a heat storage furnace according to the preamble of the first claim.

Es ist bei Wärmespeicheröfen ganz allgemein bekannt, eine Seitenwand des Gehäuses sowie die dort angeordnete Wärmeisolierschicht komplett zu entfernen, wenn die in ihrer Längsrichtung senkrecht oder waagerecht im Speicherkern angeordneten Heizelemente ein- oder ausgebaut werden müssen. Da Reparaturen im allgemeinen in der Heizperiode anfallen, muß zur Vermeidung von Verbrennungen des Reparateurs der Wärmespeicherofen in der vorangehenden Aufladezeitspanne abgeschaltet werden. Dann steht an dem Reparaturtag keine Heizwärme aus diesem Wärmespeicherofen zur Verfügung.It is very well known in heat storage furnaces to completely remove a side wall of the housing and the heat insulation layer arranged there when the heating elements arranged vertically or horizontally in the storage core must be installed or removed in their longitudinal direction. Since repairs generally occur during the heating period, the heat storage furnace must be switched off in the preceding charging period in order to avoid burns to the repairer. Then no heating is available from this heat storage furnace on the repair day.

Der Erfindung liegt die Aufgabe zugrunde, bei einem gemäß dem Oberbebriff des ersten Anspruchs ausgebildeten Wärmespeicherofen Maßnahmen zu treffen, durch welche ein Austausch des Heizelementes von vorn bei weitgehend am Speicherkern verbleibender Wärmeisolierschicht ermöglicht wird.The invention has for its object to take measures in a heat storage furnace designed according to the preamble of the first claim, by means of which an exchange of the heating element from the front is made possible with the heat insulation layer remaining largely on the storage core.

Die Lösung dieser Aufgabe erfolgt gemäß der Erfindung durch die kennzeichnenden Merkmale des ersten Anspruchs.This object is achieved according to the invention by the characterizing features of the first claim.

Bei einer Ausgestaltung des Wärmespeicherofens gemäß der Erfindung braucht für den Austausch des Heizelementes lediglich der Teil der Wärmeisolierschicht entfernbar zu sein, welcher der Endöffnung der Aussparung benachbart ist, bzw. kann bei verformbarem Material der Wärmeisolierschicht bereits ein Schlitz genügen, durch den das Heizelement hindurchgeführt und der anschließend wieder zusammengedrückt wird. Dadurch wird das Auswechseln eines Heizelementes selbst bei heißem Speicherkern problemlos, da die Wärmeisolierschicht zumindest weitgehend erhalten bleibt und eine ungehinderte Wärmeabstrahlung nur von einem geringen Teil der Oberfläche des Speicherkerns auftreten kann.In one embodiment of the heat storage furnace according to the invention, only the part of the heat insulation layer that is adjacent to the end opening of the recess needs to be removable for the replacement of the heating element, or a slot through which the heating element is passed and the deformable material of the heat insulation layer can already suffice which is then compressed again. This makes it easy to replace a heating element even with a hot storage core, since the thermal insulation layer is at least largely retained and unhindered heat radiation can only occur from a small part of the surface of the storage core.

Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen angegeben.Advantageous embodiments of the invention are specified in the further claims.

Die Erfindung ist nachfolgend anhand der Zeichnungen eines Ausführungsbeispiels näher erläutert.The invention is explained below with reference to the drawings of an embodiment.

Es zeigen:

  • Figur 1 eine schematische Schnittdarstellung eines Wärmespeicherofens mit eingesetztem Heizele-. ment,
  • Figur 2 eine Konturendarstellung des Heizelementes und
  • Figur 3 den Wärmespeicherofen bei herausgenommenem Heizelement.
Show it:
  • Figure 1 is a schematic sectional view of a heat storage furnace with heating element inserted. ment,
  • Figure 2 is a contour representation of the heating element and
  • Figure 3 shows the heat storage furnace with the heating element removed.

Eine Wärmeisolierschicht 1 umgibt einen Speicherkern 2 aus wärmespeichernden Material. Der Speicherkern 2 sitzt auf einem Bodenisolierstein 3 auf und ist von einem umgekehrt U-förmigen Entladeluftkanal 4 durchzogen. Im Speicherkern 2 befindet sich auch eine im wesentlichen senkrecht verlaufende Aussparung 5, die der Form eines darin eingesetzten Heizelementes 6 angepaßt ist. Das elektrische Heizelement 6 ist wie die Aussparung 5 langgestreckt .ausgebildet und in Längsrichtung um etwa 90 gebogen, so daß sich eine im wesentlichen in Längsrichtung senkrecht verlaufende Anordnung ergibt. Die untenliegende Endöffnung 7 der Aussparung 5 weist zu der im Betrieb vorn liegenden, in den zu beheizenden Raum gerichteten Seitenwand 8 eines die Wärmeisolierschicht außen übergreifenden Gehäuses hin. In die Endöffnung 7 ist das angepaßte Anschlußende 9 des Heizelementes 6 eingefügt, das die Endöffnung 7 verschließt. Die an der vorderen Seitenwand 8 eines äußeren Gehäuses angeordnete Wärmeisolierschicht ist an einer schräg verlaufenden Trennfuge 10 so geteilt, daß im Bereich der Endöffnung 7 bzw. des Anschlußendes 9 ein selbständig handhabbarer Isolierschichtteil 11 gebildet ist. Dieser untere Isolierschichtteil 11 kann unabhängig von der übrigen Wärmeisolierschicht 1 entfernt werden, so daß der Speicherkern 2 im begrenzten Bereich der Endöffnung 7 freigelegt werden kann. Dadurch kann das Heizelement 6 aufgrund seiner bogenförmigen Gestaltung aus der Aussparung 5 herausgezogen werden, wobei dann lediglich der untere Abschnitt des Speicherkerns 2 freigelegt ist. Dabei kann der Isolierteil 11 selbstverständlich auch auf den unmittelbaren Bereich der Endöffnung 7 beschränkt werden, wenn andernfalls die Wärmeabstrahlung des aufgeladenen Speicherkerns 2 im Reparaturfalle zu groß sein sollte. Es ist dabei jedoch auch möglich, bei Anwendung einer verformbaren Wärmeisolierschicht z.B. aus Steinwolle oder Glaswolle, im Bereich der Endöffnung 7 die Wärmeisolierschicht zu schlitzen, so daß die Schlitze im Reparaturfalle geöffnet und das Heizelement 6 ausgetauscht werden kann. Dabei kann das. Schlitzen auch erst im Reparaturfall vorgenommen werden. Das Heizelement 6 besteht vorzugsweise aus Rohrheizkörpern, die im wesentlichen haarnadelförmig gebogen sind und zusätzlich in Längsrichtung ihrer Schenkel insgesamt um etwa 90° sichelförmig gebogen sind. Es kann jedoch auch aus einem in sich starren keramischen Träger mit angeformtemAnschlußende 9 und einem Heizdraht bestehen. Dadurch kann es von der senkrechten vorderen Seitenwand 8 aus in die senkrecht nach oben gerichtete Aussparung 5 eingesetzt werden. Durch die Anordnung der Endöffnung 7 und des Isolierteils 11 kann somit selbst bei in eine Nische eingestelltem Wärmespeicherofen das Heizelement 6 ohne Schwierigkeiten von vorn ausgetauscht werden, wobei durch das Isolierteil 11 der freigelegte Strahlungsteil des Speicherkerns 2 auf ein Minimum reduziert werden kann. Das ist möglich, weil die Endöffnung 7 nur eine Höhe aufweist, die einen Bruchteil der Heizkörperlänge beträgt.A heat insulation layer 1 surrounds a storage core 2 made of heat-storing material. The storage core 2 sits on a floor insulating brick 3 and is crossed by an inverted U-shaped discharge air duct 4. In the memory core 2 there is also an essentially vertical recess 5 which is adapted to the shape of a heating element 6 inserted therein. The electrical heating element 6, like the recess 5, is elongated. It is formed and bent in the longitudinal direction by approximately 90, so that there is an essentially perpendicular arrangement in the longitudinal direction. The bottom end opening 7 of the cutout 5 points to the side wall 8, which is at the front during operation and is directed into the space to be heated, of a housing which overlaps the heat insulation layer on the outside. In the end opening 7, the adapted connection end 9 of the heating element 6 is inserted, which closes the end opening 7. The heat insulating layer arranged on the front side wall 8 of an outer housing is divided at an inclined parting line 10 in such a way that an independently manageable insulating layer part 11 is formed in the region of the end opening 7 or the connecting end 9. This lower insulating layer part 11 can be removed independently of the remaining heat insulating layer 1, so that the storage core 2 can be exposed in the limited area of the end opening 7. As a result, the heating element 6 can be pulled out of the recess 5 due to its arcuate design, only the lower section of the storage core 2 being exposed. The insulating part 11 can of course also be limited to the immediate area of the end opening 7 if the heat radiation from the charged storage core 2 should otherwise be too great in the event of a repair. However, it is also possible to use a deformable heat insulation layer, for example made of rock wool or Glass wool to slit the heat insulation layer in the area of the end opening 7, so that the slits can be opened in the event of a repair and the heating element 6 can be replaced. The slitting can only be carried out in the event of a repair. The heating element 6 preferably consists of tubular heating elements which are bent essentially in the shape of a hairpin and are additionally bent in the longitudinal direction of their legs by a total of about 90 ° in a crescent shape. However, it can also consist of a rigid ceramic support with an integrally formed connecting end 9 and a heating wire. As a result, it can be inserted from the vertical front side wall 8 into the recess 5 directed vertically upwards. Due to the arrangement of the end opening 7 and the insulating part 11, the heating element 6 can thus be exchanged from the front without difficulty even when the heat storage furnace is set in a niche, the exposed radiation part of the storage core 2 being able to be reduced to a minimum by the insulating part 11. This is possible because the end opening 7 only has a height that is a fraction of the radiator length.

An Stelle einer in sich starren Anordnung kann das Heizelement auch aus einzelnen begrenzt gegeneinander verstellbaren keramischen Gliedern aufgebaut sein, auf welche eine Heizwendel aufgewickelt ist und die eine stabförmige, in Achsrichtung biegbare Anordnung bilden. Das so ausgeführte Heizelement kann unter axialer Durchbiegung durch die Einstecköffnung nach oben geschoben werden.Instead of an inherently rigid arrangement, the heating element can also be constructed from individual ceramic members which can be adjusted to a limited extent, on which a heating coil is wound and which form a rod-shaped arrangement which can be bent in the axial direction. The heating element designed in this way can be pushed upwards under axial deflection through the insertion opening.

Im übrigen hat das Anschlußende 9 und die von der Höhe her sehr klein haltbare Endöffnung 7 den wesentlichen Vorteil, daß Wärmestrahlung vom Heizelement 6 nicht bis zur Wärmeisolierschicht 1 oder bis zu einem die Endöffnung verschließenden Blech gelangt, sondern im Inneren des Speicherkerns 2 absorbiert wird. Das gleiche trifft auch für die durch den Speicherkern 2 geleitete Luft zu. Dabei kann der Luftkanal als separater Luftweg getrennt vom Heizelement geführt werden.For the rest, the connection end 9 and the end opening 7, which is very small in height, has the essential advantage that heat radiation from the heating element 6 does not reach Thermal insulation layer 1 or up to a plate closing the end opening, but is absorbed inside the storage core 2. The same also applies to the air conducted through the storage core 2. The air duct can be routed separately from the heating element as a separate air path.

Claims (7)

1. Wärmespeicherofen mit einem Speicherkern, der innerhalb eines Gehäuses von einer Wärmeisolierschicht umgeben ist, mit mindestens einem Heizelement in einer Aussparung des Speicherkerns sowie mit wenigstens einer ab- nehmbaren Seitenwand des Gehäuses, dadurch gekennzeichnet, daß das Heizelement (6) langgestreckt und in seiner Längsrichtung gebogen ist, daß eine Endöffnung (7) der Aussparung (5) zur vorderen Seitenwand (8) hinweist sowie lediglich einen Bruchteil der Höhe des Speicherkerns (2) aufweist, und daß die Wärmeisolierschicht (1) im Bereich der Endöffnung (7) für den Durchtritt des Heizelementes (6) zu öffnen ist.1. Heat storage furnace with a storage core, which is surrounded within a housing by a heat insulating layer, with at least one heating element in a recess of the storage core and with at least one removable side wall of the housing, characterized in that the heating element (6) elongated and in its Is bent in the longitudinal direction that an end opening (7) of the recess (5) points to the front side wall (8) and has only a fraction of the height of the storage core (2), and that the heat insulating layer (1) in the region of the end opening (7) for the passage of the heating element (6) is to be opened. 2. Wärmespeicherofen nach Anspruch 1, dadurch gekennzeichnet, daß die Wärmeisolierschicht (1) an der vorderen Seitenwand (8) geteilt ist und daß der der Endöffnung (7) zugeordnete Isolierschichtteil (11) für sich abnehmbar ist.2. Heat storage furnace according to claim 1, characterized in that the heat insulating layer (1) on the front side wall (8) is divided and that the insulating layer part (11) associated with the end opening (7) is removable for itself. 3. Wärmespeicherofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Endöffnung (7) im unteren Bereich des Speicherkerns (2) vorgesehen ist.3. Heat storage furnace according to claim 1 or 2, characterized in that the end opening (7) is provided in the lower region of the storage core (2). 4. Wärmespeicherofen nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß das Heizelement (6) bzw. die Aussparung (5) von der Endöffnung (7) nach oben gerichtet ist.4. Heat storage furnace according to claim 1 or one of the following, characterized in that the heating element (6) or the recess (5) from the end opening (7) is directed upwards. 5. Wärmespeicherofen nach Anspruch 1, dadurch gekennzeichnet, daß die Wärmeisolierschicht (1) aus verformbarem Material besteht und im Bereich der Endöffnung der Aussparung auftrennbar ist.5. Heat storage furnace according to claim 1, characterized in that the heat insulating layer (1) consists of deformable material and can be separated in the region of the end opening of the recess. 6. Wärmespeicherofen nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß das Heizelement (6) in sich starr ist.6. Heat storage furnace according to claim 1 or one of the following, characterized in that the heating element (6) is rigid in itself. 7. Wärmespeicherofen nach wenigstens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß auf einen aus einzelnen begrenzt gegeneinander verstellbaren Gliedern aufgebauten Heizwendelträger eine Heizwendel aufgebracht ist.7. Heat storage furnace according to at least one of claims 1 to 5, characterized in that a heating coil is applied to a heating coil support constructed from individual limbs which are adjustable relative to one another.
EP82109632A 1981-10-22 1982-10-19 Storage heater Expired EP0077993B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109632T ATE23739T1 (en) 1981-10-22 1982-10-19 HEAT STORAGE STOVE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813141863 DE3141863A1 (en) 1981-10-22 1981-10-22 HEAT STORAGE STOVE
DE3141863 1981-10-22

Publications (2)

Publication Number Publication Date
EP0077993A1 true EP0077993A1 (en) 1983-05-04
EP0077993B1 EP0077993B1 (en) 1986-11-20

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ID=6144599

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EP82109632A Expired EP0077993B1 (en) 1981-10-22 1982-10-19 Storage heater

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EP (1) EP0077993B1 (en)
AT (1) ATE23739T1 (en)
DE (1) DE3141863A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042081A (en) * 1987-11-24 1991-08-20 Steffes Manufacturing, Inc. Electrical thermal storage heating unit with easily replaced heating

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH137379A (en) * 1929-01-17 1929-12-31 Therma Ag Device for storing and using electrically generated heat.
US2380545A (en) * 1943-02-23 1945-07-31 Westinghouse Electric Corp Water heating apparatus
DE1690656B1 (en) * 1967-03-13 1971-11-04 Heinrich Roos ELECTRIC HEAT STOVE WITH EASILY REPLACEABLE HEATING UNIT
GB1253025A (en) * 1967-09-07 1971-11-10
EP0038305A2 (en) * 1980-04-15 1981-10-21 L'industrielle D'equipement Heating apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1773822U (en) 1958-06-03 1958-09-11 Muckenfuss Soehne Malag ELECTRIC STORAGE OVEN.
DE1535956A1 (en) 1966-03-07 1970-08-06 Christ Lud Wagner Strickwarenf Device for beating double-row jacquard cards
DE6930216U (en) 1969-10-01 1969-12-18 Axel G Rohde ELECTRIC HEATING INSERT FOR COAL TILED STOVES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH137379A (en) * 1929-01-17 1929-12-31 Therma Ag Device for storing and using electrically generated heat.
US2380545A (en) * 1943-02-23 1945-07-31 Westinghouse Electric Corp Water heating apparatus
DE1690656B1 (en) * 1967-03-13 1971-11-04 Heinrich Roos ELECTRIC HEAT STOVE WITH EASILY REPLACEABLE HEATING UNIT
GB1253025A (en) * 1967-09-07 1971-11-10
EP0038305A2 (en) * 1980-04-15 1981-10-21 L'industrielle D'equipement Heating apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042081A (en) * 1987-11-24 1991-08-20 Steffes Manufacturing, Inc. Electrical thermal storage heating unit with easily replaced heating

Also Published As

Publication number Publication date
ATE23739T1 (en) 1986-12-15
DE3141863A1 (en) 1983-05-05
EP0077993B1 (en) 1986-11-20

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