EP0110364A1 - Mikrowellenherd mit gemeinsamer Wandung für Aussenhülle und Bratrohr - Google Patents

Mikrowellenherd mit gemeinsamer Wandung für Aussenhülle und Bratrohr Download PDF

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Publication number
EP0110364A1
EP0110364A1 EP83111895A EP83111895A EP0110364A1 EP 0110364 A1 EP0110364 A1 EP 0110364A1 EP 83111895 A EP83111895 A EP 83111895A EP 83111895 A EP83111895 A EP 83111895A EP 0110364 A1 EP0110364 A1 EP 0110364A1
Authority
EP
European Patent Office
Prior art keywords
cavity
oven
metal sheet
microwave oven
wrap
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
EP83111895A
Other languages
English (en)
French (fr)
Other versions
EP0110364B1 (de
Inventor
Ronald W. Millman
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.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems Inc
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 Litton Systems Inc filed Critical Litton Systems Inc
Priority to AT83111895T priority Critical patent/ATE25799T1/de
Publication of EP0110364A1 publication Critical patent/EP0110364A1/de
Application granted granted Critical
Publication of EP0110364B1 publication Critical patent/EP0110364B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • 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
    • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord

Definitions

  • This invention relates to the construction of microwave ovens, and especially to the construction of the oven cavity and outer wrap. Because of the need to contain microwave frequency energy in a controlled fashion, almost all microwave ovens heretofore known include a discrete, box-like element referred to as the cooking cavity, or simply cavity. The cavity was secured into some kind of frame which housed the remainder of the oven operating components, the entire assembly being enclosed in a decorative outer shell, called a wrap.
  • microwave ovens be constructed as economically as possible.
  • One way to realize substantial manufacturing economy is to combine the oven cavity and outer wrap into a single element.
  • the present invention teaches how such a combination may be accomplished, which combined with other aspects of the invention provide a truly economical construction.
  • the present invention provides for the construction of a microwave oven having a combined oven cavity and wrap.
  • a single formed metal sheet is folded to form an oven cavity which simultaneously provides one side wall and a major portion of the top and bottom walls of the outer wrap.
  • a companent section is added to the cavity to complete the other side wall and the remaining portion of the top and bottom of the wrap.
  • a front and back panel are added to complete the construction.
  • the cavity portion as well as the front and back panels may all be assembled by crimping techniques, thereby eliminating the need for welding or other forms of fastening.
  • Figure 1 is an exploded perspective view showing the microwave oven construction of the present invention.
  • the oven cavity 10 is formed from a single flat metal sheet which has been formed and folded to construct a generally box-like cavity.
  • the cavity 10 includes top wall 20, side wall 21, bottom wall 22 and side wall portions 23 and 24 each having flanges 18 and 19.
  • side wall portions 23 and 24 are joined together along edge 26 by means of a crimp seam whereby the side wall portions are folded upon one another to form a secure folded seam of the type illustrated in Figures 3 and 4.
  • An aperture 25 is provided in the side wall 24, over which is mounted a waveguide 15.
  • a components compartment 12 consisting of a generally U-shaped metal sheet having an access portion and flanges 13 and 14 is attached to the cavity element 10 by spotwelding along the flanges 13 and 14.
  • Back panel 17 and front panel 16 are now added to the cavity/ component compartment assembly.
  • the front panel 16 is initially spotwelded to the flanges 18.
  • the back panel 17 is initially spotwelded to the flanges 19.
  • a crimp seam is then formed about the entire periphery of front panel 16 and back panel 17 crimping the front and back panels to the cavity element 10 and the component compartment 12. After the crimping operation the microwave oven structure is shown in Figure 2 results. The details of the crimp seam are shown in Figures 3 and 4.
  • an access panel (not shown) is placed over the component compartment 12 to close it.
  • the access panel may be attached by means of tamper-proof fasteners.
  • a microwave oven door (not shown) is then mounted to a front panel 16 to complete the oven construction.
  • top wall 20 and side wall 21 may be painted some chosen color or may be covered with woodgrain vinyl.
  • the interior side of the same top wall 20 and side wall 21, as well as bottom wall 22 may all be painted a different color, such as white, for the interior of the oven cavity.
  • the oven cavity and outer wrap are both provided by the same single metal sheet and that there is no separate cavity and/or outer wrap portion.
  • the exterior of component compartment 12 will of course be finished in the same manner as the exterior portion of the cavity element 10.
  • the construction described and illustrated provides for an extremely simple microwave oven construction comprising a very small number of individual parts.
  • the use of the common cavity wall and outer wrap reduces the materials used in the oven and the construction complexity to a minimum, and the use of crimping techniques to assemble the components greatly reduces the labor required in assembly as compared to previously known constructions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Threshing Machine Elements (AREA)
  • Confectionery (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
EP83111895A 1982-11-29 1983-11-28 Mikrowellenherd mit gemeinsamer Wandung für Aussenhülle und Bratrohr Expired EP0110364B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111895T ATE25799T1 (de) 1982-11-29 1983-11-28 Mikrowellenherd mit gemeinsamer wandung fuer aussenhuelle und bratrohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US44529182A 1982-11-29 1982-11-29
US445291 1982-11-29

Publications (2)

Publication Number Publication Date
EP0110364A1 true EP0110364A1 (de) 1984-06-13
EP0110364B1 EP0110364B1 (de) 1987-03-04

Family

ID=23768341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111895A Expired EP0110364B1 (de) 1982-11-29 1983-11-28 Mikrowellenherd mit gemeinsamer Wandung für Aussenhülle und Bratrohr

Country Status (10)

Country Link
EP (1) EP0110364B1 (de)
KR (1) KR840007169A (de)
AT (1) ATE25799T1 (de)
AU (1) AU576741B2 (de)
CA (1) CA1203580A (de)
DE (2) DE110364T1 (de)
DK (1) DK161481C (de)
HK (1) HK59488A (de)
IE (1) IE54739B1 (de)
ZA (1) ZA838604B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442161A (en) * 1992-09-30 1995-08-15 Matsushita Electric Industrial Co., Ltd. Oven having vacuum heat insulating wall and method for assembling same
US5886328A (en) * 1996-08-20 1999-03-23 Samsung Electronics Co., Ltd. Cooking chamber cavity structure of microwave ovens
US6653610B2 (en) * 2000-12-28 2003-11-25 Lg Electronics Inc. Electric outfit room in microwave oven
US6812444B2 (en) 2000-12-28 2004-11-02 Lg Electronics Inc. Device for cooling the electronic equipment of a microwave oven

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930004536B1 (ko) * 1987-07-31 1993-05-27 마쯔시다덴기산교 가부시기가이샤 전자레인지의 가열상자
JPH074405Y2 (ja) * 1989-04-25 1995-02-01 シャープ株式会社 加熱調理器の枠体構造

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889414A (en) * 1954-01-11 1959-06-02 Gen Dynamics Corp Combination recording heads
GB1017223A (en) * 1961-09-12 1966-01-19 Telefunken Patent Rotating magnetic-head arrangement for playing back wide-band signals, particularly television signals
GB1321940A (en) * 1971-01-04 1973-07-04 Ampex Multichannel rotary transformer
US4192431A (en) * 1977-10-25 1980-03-11 General Motors Corporation Microwave oven single wall construction
US4277809A (en) * 1979-09-26 1981-07-07 Memorex Corporation Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium
US4282416A (en) * 1978-08-21 1981-08-04 General Electric Co. Unitized structure for a microwave oven
DE3120549A1 (de) * 1980-05-23 1982-03-11 Ricoh Co., Ltd., Tokyo Magnetisches aufzeichnungs- und wiedergabegeraet der art mit senkrechter aufzeichnung
EP0053944A1 (de) * 1980-12-09 1982-06-16 Matsushita Electric Industrial Co., Ltd. Kopfaufbau zum senkrechten magnetischen Aufzeichnen und Wiedergeben und ein denselben verwendendes magnetisches Aufzeichnungssystem

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1184458A (en) * 1981-06-16 1985-03-26 Noboru Igarashi Construction of heating compartment for cooking apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889414A (en) * 1954-01-11 1959-06-02 Gen Dynamics Corp Combination recording heads
GB1017223A (en) * 1961-09-12 1966-01-19 Telefunken Patent Rotating magnetic-head arrangement for playing back wide-band signals, particularly television signals
GB1321940A (en) * 1971-01-04 1973-07-04 Ampex Multichannel rotary transformer
US4192431A (en) * 1977-10-25 1980-03-11 General Motors Corporation Microwave oven single wall construction
US4282416A (en) * 1978-08-21 1981-08-04 General Electric Co. Unitized structure for a microwave oven
US4277809A (en) * 1979-09-26 1981-07-07 Memorex Corporation Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium
DE3120549A1 (de) * 1980-05-23 1982-03-11 Ricoh Co., Ltd., Tokyo Magnetisches aufzeichnungs- und wiedergabegeraet der art mit senkrechter aufzeichnung
EP0053944A1 (de) * 1980-12-09 1982-06-16 Matsushita Electric Industrial Co., Ltd. Kopfaufbau zum senkrechten magnetischen Aufzeichnen und Wiedergeben und ein denselben verwendendes magnetisches Aufzeichnungssystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, VOL. 7, NO. 164 (P-211)(1309), 19H JULY 1983; & JP-A- 58 070 414 (NIPPON VICTOR K.K.) 26-04-1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442161A (en) * 1992-09-30 1995-08-15 Matsushita Electric Industrial Co., Ltd. Oven having vacuum heat insulating wall and method for assembling same
US5886328A (en) * 1996-08-20 1999-03-23 Samsung Electronics Co., Ltd. Cooking chamber cavity structure of microwave ovens
US6653610B2 (en) * 2000-12-28 2003-11-25 Lg Electronics Inc. Electric outfit room in microwave oven
US6812444B2 (en) 2000-12-28 2004-11-02 Lg Electronics Inc. Device for cooling the electronic equipment of a microwave oven

Also Published As

Publication number Publication date
IE832658L (en) 1984-05-29
DK543983D0 (da) 1983-11-28
DK543983A (da) 1984-05-30
AU2145483A (en) 1984-06-07
CA1203580A (en) 1986-04-22
AU576741B2 (en) 1988-09-08
ZA838604B (en) 1985-06-26
ATE25799T1 (de) 1987-03-15
EP0110364B1 (de) 1987-03-04
HK59488A (en) 1988-08-12
DE110364T1 (de) 1984-12-06
DK161481C (da) 1991-12-16
KR840007169A (ko) 1984-12-05
DE3370118D1 (en) 1987-04-09
DK161481B (da) 1991-07-08
IE54739B1 (en) 1990-01-17

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