EP3657908A1 - Four - Google Patents

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Publication number
EP3657908A1
EP3657908A1 EP19209883.8A EP19209883A EP3657908A1 EP 3657908 A1 EP3657908 A1 EP 3657908A1 EP 19209883 A EP19209883 A EP 19209883A EP 3657908 A1 EP3657908 A1 EP 3657908A1
Authority
EP
European Patent Office
Prior art keywords
walls
bush
oven
shoulder
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.)
Granted
Application number
EP19209883.8A
Other languages
German (de)
English (en)
Other versions
EP3657908B1 (fr
Inventor
Matjaz ES
Andrej Bolcina
Janez PIRTOVSEK
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.)
Gorenje d o o
Original Assignee
Gorenje d o o
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 Gorenje d o o filed Critical Gorenje d o o
Publication of EP3657908A1 publication Critical patent/EP3657908A1/fr
Application granted granted Critical
Publication of EP3657908B1 publication Critical patent/EP3657908B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6408—Supports or covers specially adapted for use in microwave heating apparatus
    • H05B6/6411—Supports or covers specially adapted for use in microwave heating apparatus the supports being rotated
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
    • H05B6/6452—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors the sensors being in contact with the heated product
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473—Aspects related to microwave heating combined with other heating techniques combined with convection heating

Definitions

  • the present invention refers to the area of household appliances, in particular ovens, where microwaves are used either exclusively or in addition to conventional energy sources for heat treatment of food.
  • microwaves and, respectively, energy needed for heat treatment of goods located in a baking chamber are/is supplied to said baking chamber.
  • Microwaves in the microwave oven are generated by means of a microwave generator which transfers microwaves via waveguide into the baking chamber.
  • a stirrer provides for the microwaves to be distributed more or less over the entire baking chamber. Microwave are bouncing from walls and door of the oven and from all elements incorporated into the oven. With such a disordered stream of microwaves in the backing chamber, microwaves tend to escape from the oven through every gap possible. Particularly questionable is escape of microwaves from the oven into the surrounding along a shaft of a turntable for receiving goods to be heat treated, and along a fan shaft of the oven.
  • a kitchen appliance in particular an oven, is generally comprised of an outer housing not shown, an inner housing and, respectively inner wall 1, back walls 2 closing one of the longitudinal ends of the inner wall 1 and is comprised of a inner support wall 2a and spaced therefrom of an outer partition wall 2b, and a door not shown, said inner wall 1 and said back walls 2 creating a backing room 3 that can be closed by said door.
  • at least one oven element 4 penetrating inner wall 1 and/ or back walls 2 is arranged in the backing room 3.
  • Said oven element 4 can be movable such as a thermostat probe, support for guides to receive a backing tray, and similar, or rotatable such as an axis or a shaft with an element 5 rotatably associated therewith, such as a turntable to receive goods to be heat treated in the oven, a fan for mixing air in the backing room 3, and similar.
  • Said shaft 4 extends approximately centrically from the region of the baking room 3 and penetrates the walls 2 where it is rotatably supported by means of a metal support bush 6, and further up to said rotatable element 5.
  • Said bush 6 is fixed in each wall 2a, 2b of the walls 2.
  • the inner support wall 2a of the walls 2 is formed with a through hole 7 formed over its rim with an axially extending fold 8
  • the outer partition wall 2b of the walls 2 is formed with a through hole 9 formed over its rim with an axially extending fold 10, said through holes 7, 9 being coaxial.
  • Said support bush 6 is formed at each longitudinal end thereof with a shoulder 11, 12. It is provided for, according to the preferred embodiment that a first shoulder lying close to the inner support wall 2a is formed as an inner shoulder 11 in a manner of a radial indentation in the bush 6. Furthermore, it is provided that a second shoulder lying close to the outer partition wall 2b is formed as an outer shoulder 12 in a manner of an abrupt decrease of the outer diameter of the bush 6. Said bush 6 is connected at least to one of the wall 2a, 2b of the walls 2 either in a removable manner such as by means of a threaded connection, or in a fixed manner such as by means of a force-locking joint and/or a form-locking joint and/or a material joint.
  • a sealing gasket 13 is arranged inside said inner shoulder and, respectively, depression 11 tightly embracing the shaft 4 passing through the bush 6.
  • Said sealing gasket 13 is selected as a ceramic foam sealing gasket or similar.
  • connection of the inner support wall 2a of walls 2 and the bush 6 is realised in a manner that the fold 8 of the through hole 7 facing the outer partition wall 2b is inserted with interference fit into said inner shoulder and, respectively, depression 11, thus, enabling a reliable electrically conductive contact between the bush 6 and the support wall 2a.
  • Said fold 8 comes into contact with said sealing gasket 13, preferably over the region of the outer circumference of the sealing gasket 13, wherein said fold 8 loads the gasket 13 both in axial direction towards the bottom of the depression 11 and in radial direction towards the shaft 4, and towards the circumferential wall of the depression 11, thus, enabling reliable sealing and preventing steam to pass through the gap between said bush 6 and said shaft 4.
  • connection of the outer partition wall 2b of walls 2 and the bush 6 is realised in a manner that the fold 10 of the through hole 9 facing the inner support wall 2a is stuck with interference fit onto said outer shoulder 12 of the bush 6, thus, enabling a reliable electrically conductive contact between the bush 6 and the partition wall 2b.
  • Said metal bush 6 is made as a one-piece element, by lathing, sintering, casting, and similar.
  • the bush 6 is in axial direction somewhat longer than the distance between the support wall 2a and the partition wall 2b of the walls 2 resulting in a slight deformation of the walls 2a, 2b during assembly, which in turn results in a reliable contact between the bush 6 and each wall 2a, 2b of the walls 2.
  • the length of the depression 11 in axial direction is smaller than the distance between the walls 2a, 2b, preferably said length is substantially smaller than said distance.
  • the present invention is not limited to sealing of the fan shaft passing through walls of the microwave oven. It can be used without substantial changes with all elements which penetrate any wall of the microwave oven such as with the thermostat probe, support for guides to receive a backing tray, or with the axis or the shaft of a turntable to receive goods to be heat treated in the oven, a fan for mixing air in the backing room 3, and similar.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP19209883.8A 2018-11-22 2019-11-19 Four Active EP3657908B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201800252A SI25742A (sl) 2018-11-22 2018-11-22 Pečica

Publications (2)

Publication Number Publication Date
EP3657908A1 true EP3657908A1 (fr) 2020-05-27
EP3657908B1 EP3657908B1 (fr) 2022-09-07

Family

ID=68618007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19209883.8A Active EP3657908B1 (fr) 2018-11-22 2019-11-19 Four

Country Status (3)

Country Link
EP (1) EP3657908B1 (fr)
PL (1) PL3657908T3 (fr)
SI (1) SI25742A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021194U (ja) * 1983-07-20 1985-02-14 三洋電機株式会社 高周波加熱装置
JPH01204387A (ja) * 1988-02-09 1989-08-16 Hitachi Heating Appliance Co Ltd 高周波加熱装置
WO2011080204A1 (fr) * 2009-12-30 2011-07-07 Arcelik Anonim Sirketi Four

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021194U (ja) * 1983-07-20 1985-02-14 三洋電機株式会社 高周波加熱装置
JPH01204387A (ja) * 1988-02-09 1989-08-16 Hitachi Heating Appliance Co Ltd 高周波加熱装置
WO2011080204A1 (fr) * 2009-12-30 2011-07-07 Arcelik Anonim Sirketi Four
EP2520133A1 (fr) 2009-12-30 2012-11-07 Arçelik Anonim Sirketi Four

Also Published As

Publication number Publication date
PL3657908T3 (pl) 2022-10-17
SI25742A (sl) 2020-05-29
EP3657908B1 (fr) 2022-09-07

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