EP2738473A1 - Hochfrequenzkochgerät - Google Patents

Hochfrequenzkochgerät Download PDF

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Publication number
EP2738473A1
EP2738473A1 EP12817226.9A EP12817226A EP2738473A1 EP 2738473 A1 EP2738473 A1 EP 2738473A1 EP 12817226 A EP12817226 A EP 12817226A EP 2738473 A1 EP2738473 A1 EP 2738473A1
Authority
EP
European Patent Office
Prior art keywords
heating chamber
illumination
led element
light
chamber
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
EP12817226.9A
Other languages
English (en)
French (fr)
Other versions
EP2738473B1 (de
EP2738473A4 (de
Inventor
Yuji Hayakawa
Ikuhiro Inada
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.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Publication of EP2738473A1 publication Critical patent/EP2738473A1/de
Publication of EP2738473A4 publication Critical patent/EP2738473A4/de
Application granted granted Critical
Publication of EP2738473B1 publication Critical patent/EP2738473B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities
    • 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
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity

Definitions

  • the present invention relates to a high-frequency cooker in which an LED element is used for illuminating an interior of a heating chamber.
  • a high-frequency cooker is provided with illumination for an interior of a heating chamber such that the state of food to be heated may be observed.
  • a cooker it is necessary to allow a user to visually recognize that food is heated deliciously.
  • Patent Document 1 JP-A-5-164331
  • Radio wave shielding properties of a wall surface portion of a heating chamber provided with illumination holes depend on a thickness of the wall, a pore diameter of the illumination holes, and a pitch between the illumination holes, and intensity of illumination of the heating chamber also depends thereon.
  • the pore diameter needs to be reduced in order to improve the radio wave shielding properties, and the pore diameter and the number of the illumination holes need to be increased in order to increase the intensity of illumination.
  • the radio wave shielding properties and the intensity of illumination inside the heating chamber have a contradictory relation.
  • the radio wave shielding properties and the intensity of illumination inside the heating chamber also have a contradictory relation, so that in order to improve the radio wave shielding properties, the pitch between the illumination holes needs to be increased to reduce the number of the illumination holes.
  • This configuration has a problem in that the transmittance of light in an illumination device is decreased, whereby the intensity of illumination of the heating chamber is decreased. Consequently, shadows of bars between the illumination holes are generated, and visibility of food is reduced. Therefore, the power output of the illumination device needs to be increased.
  • the LED elements are affected by the pore diameter of the illumination holes and the pitch between the illumination holes because the LED elements include small light sources and have high directivity of light. Therefore, there is a problem in that it is necessary to increase the number of the LED elements in order to maintain the intensity of illumination.
  • a high-frequency cooker uses an LED element for chamber illumination in a heating chamber, and an illumination hole provided in a wall surface of the heating chamber for projecting light into an interior of the heating chamber has a quadrilateral shape.
  • the light from the LED element passes through the quadrilateral hole and if projected onto the interior of the chamber.
  • the light can be projected without decreasing the transmittance of light since the LED element provided in the vicinity of the wall surface includes a small light source and has high directivity of light.
  • the quadrilateral illumination hole has one side located on a rear side of the heating chamber and parallel to a plane of an opening provided on a front surface of the heating chamber, which is longer than one side located on a front side of the heating chamber. Consequently, if an LED element having high intensity is used as the LED element, the light toward the front side can be decreased and the light toward the rear side in the chamber can be increased. Therefore, it is possible to illuminate the entire interior of the chamber with a small number of LED elements while the strong light from the LED element is prevented from entering user's eyes.
  • the illumination hole has the quadrilateral shape, the interior of the heating chamber can be illuminated to the corners of the chamber with a small number of LED elements while keeping radio wave shielding properties improved.
  • a first invention provides a high-frequency cooker which supplies a high frequency to an interior of a heating chamber that houses an object to be heated and which heat-treats the object to be heated, the high-frequency cooker including: an LED element which is used for chamber illumination in the heating chamber, and which is provided in a vicinity of a wall surface of the heating chamber; and an illumination hole provided in the wall surface of the heating chamber for projecting light into the interior of the heating chamber, wherein the illumination hole has a quadrilateral shape, and wherein one side of the quadrilateral illumination hole located on a rear side of the heating chamber and parallel to a plane of an opening provided on a front surface of the heating chamber for inserting and removing the object to be heated is longer than one side of the quadrilateral illumination hole located on a front side of the heating chamber.
  • the light from the LED element passes through the quadrilateral hole and is projected onto the interior of the chamber.
  • the light can be projected without decreasing the transmittance of light since the LED element provided in the vicinity of the wall surface includes a small light source and has high directivity of light.
  • the one side of the quadrilateral illumination hole located on the rear side of the heating chamber and parallel to the plane of an opening provided on the front surface of the heating chamber is longer than the one side located on the front side of the heating chamber, if an LED element having high intensity is used as the LED element, the light toward the front side can be decreased and the light toward the rear side in the chamber can be increased. Consequently, it is possible to illuminate the entire interior of the chamber with a small number of LED elements while the strong light from the LED element is prevented from entering user's eyes.
  • the LED element includes a plurality of elements, and provides lighting patterns of simultaneous lighting and one-side lighting by a combination of different color temperatures.
  • a transparent diffusing plate is provided between the illumination hole formed in the wall surface of the heating chamber and the LED element, whereby the light projected from the LED element can be diffused by the transparent diffusing plate and projected onto corners of the interior of the heating chamber.
  • FIG. 1 (a) is a perspective view of a high-frequency cooker according to the first embodiment of the present invention
  • FIG. 1(b) is a detailed view of the portion A in the perspective view of FIG. 1(a) of the high-frequency cooker according to the first embodiment of the present invention
  • FIG. 2 is a perspective view of the high-frequency cooker according to the first embodiment of the present invention showing a structure.
  • the main body of the high-frequency cooker according to the first embodiment of the present invention includes a heating chamber 2 having a heating chamber opening 3 through which an object to be heated is inserted and removed, and an illumination hole 1 at the portion A on a wall surface of the heating chamber 2 as shown in FIG. 1(b) .
  • the wall surface of the heating chamber is provided with an LED substrate 7 serving as illumination means provided outside of the wall surface, an air guide 5 configured to guide cooling air to the inside of the heating chamber 2, and a substrate holder 9 arranged to fix the LED substrate 7 to the air guide 5 to hold.
  • light of an LED element (not shown in the drawing) provided on a surface of the LED substrate 7 provided outside of the wall surface of the heating chamber 2 passes through the illumination hole 1 that has a quadrilateral shape, and is projected onto the interior of the chamber.
  • the LED element provided in the vicinity of the wall surface has a light source of 3 mm ⁇ 3 mm or 5 mm ⁇ 5 mm that is small in size and has also high directivity of light, the light is not hindered from passing through the quadrilateral illumination hole 1 even when a size of the illumination hole 1 is, for example, 5 mm ⁇ 5 mm does not affect radio wave shielding properties, whereby the transmittance of light is not decreased.
  • one side of the quadrilateral illumination hole 1 located on a rear side of the heating chamber and parallel to the heating chamber opening 3 on a front surface of the heating chamber is longer than one side of the quadrilateral illumination hole 1 located on a front side of the heating chamber.
  • the one side on the rear side of the heating chamber is set to be 7 mm and the one side on the front side of the heating chamber is set to be 5 mm. Consequently, if an LED element having high intensity is used as the LED element, the light toward the front can be decreased and the light toward the rear side in the chamber can be increased, so that it is possible to illuminate the entire interior of the chamber with a small number of LED elements while the strong light from the LED element is prevented from entering user's eyes.
  • FIG. 3 is a structural view of a high-frequency cooker according to the second embodiment of the present invention showing a relevant part. It is to be noted that descriptions of parts that are same as or similar to the parts according to the first embodiment of the present invention are omitted or simplified.
  • the wall surface of the heating chamber is provided with a first illumination hole 1a and a second illumination hole 1b through which light of LED elements passes.
  • a first LED element 7a and a second LED element 7b are provided on a surface of the LED substrate 7. These LED elements are configured by a combination of different color temperatures, and are capable of controlling lighting patterns of simultaneous lighting and one-side lighting.
  • the high-frequency cooker having the above-described configuration, for example, by setting the color temperature of the first LED element 7a to be 3000 K and setting the color temperature of the second LED element 7b to be 5000 K, the first LED element 7a having greater color rendering properties is lit alone for food that has a vivid color such as red and green, or the second LED element 7b having the higher color temperature is lit alone when the whiteness of a dish is desired to be accentuated or when the interior of the chamber is desired to be illuminated white and bright at the time of cleaning the chamber.
  • the two conditions described above can be satisfied.
  • FIG. 4 is a detailed view of a high-frequency cooker according to the third embodiment of the present invention showing a relevant part.
  • a transparent diffusing plate 8 is provided between the illumination hole 1 on the wall surface of the heating chamber and the LED substrate 7.
  • the light projected from the LED element provided on the LED substrate 7 has high directivity, but can be diffused by the transparent diffusing plate 8 and projected onto the corners of the interior of the heating chamber.
  • the high-frequency cooker according to the present invention can illuminate the interior of the chamber brightly to the corners with a small number of LED elements, whereby energy saving and a reduction in cost can be achieved, so that the high-frequency cooker according to the present invention is effective as a high-frequency cooker.

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)
EP12817226.9A 2011-07-26 2012-07-26 Hochfrequenzkochgerät Active EP2738473B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011162728A JP5747162B2 (ja) 2011-07-26 2011-07-26 高周波調理器
PCT/JP2012/004784 WO2013014940A1 (ja) 2011-07-26 2012-07-26 高周波調理器

Publications (3)

Publication Number Publication Date
EP2738473A1 true EP2738473A1 (de) 2014-06-04
EP2738473A4 EP2738473A4 (de) 2015-01-07
EP2738473B1 EP2738473B1 (de) 2015-11-25

Family

ID=47600802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12817226.9A Active EP2738473B1 (de) 2011-07-26 2012-07-26 Hochfrequenzkochgerät

Country Status (3)

Country Link
EP (1) EP2738473B1 (de)
JP (1) JP5747162B2 (de)
WO (1) WO2013014940A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110274265B (zh) * 2013-03-07 2021-09-14 松下知识产权经营株式会社 加热烹调器
JP7108820B2 (ja) * 2018-04-27 2022-07-29 パナソニックＩｐマネジメント株式会社 加熱調理器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025734A1 (de) * 1990-08-14 1992-02-20 Bosch Siemens Hausgeraete Beleuchtungseinrichtung fuer einen ofen
US20050122709A1 (en) * 2003-12-09 2005-06-09 Samsung Electronics Co., Ltd. Lamp assembly and cooking apparatus having the same
EP2128526A1 (de) * 2008-05-31 2009-12-02 Electrolux Home Products Corporation N.V. Ofen, insbesondere Haushaltsofen
WO2010110262A1 (ja) * 2009-03-24 2010-09-30 シャープ株式会社 加熱調理器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05164331A (ja) * 1991-12-12 1993-06-29 Sharp Corp 電子レンジ
JPH064503U (ja) * 1992-06-18 1994-01-21 三洋電機株式会社 電子レンジ
KR970062507A (ko) * 1996-02-14 1997-09-12 김광호 전자렌지의 조명장치
JP2003139336A (ja) * 2001-11-01 2003-05-14 Matsushita Electric Ind Co Ltd 調理器
JP3920701B2 (ja) * 2002-03-28 2007-05-30 三洋電機株式会社 高周波加熱装置
JP2005299977A (ja) * 2004-04-08 2005-10-27 Hitachi Home & Life Solutions Inc 加熱調理器
JP2006017390A (ja) * 2004-07-02 2006-01-19 Hitachi Home & Life Solutions Inc 加熱調理器
JP5431995B2 (ja) 2010-02-13 2014-03-05 国立大学法人福井大学 水性蛍光塗料用蛍光材料およびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025734A1 (de) * 1990-08-14 1992-02-20 Bosch Siemens Hausgeraete Beleuchtungseinrichtung fuer einen ofen
US20050122709A1 (en) * 2003-12-09 2005-06-09 Samsung Electronics Co., Ltd. Lamp assembly and cooking apparatus having the same
EP2128526A1 (de) * 2008-05-31 2009-12-02 Electrolux Home Products Corporation N.V. Ofen, insbesondere Haushaltsofen
WO2010110262A1 (ja) * 2009-03-24 2010-09-30 シャープ株式会社 加熱調理器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2013014940A1 *

Also Published As

Publication number Publication date
EP2738473B1 (de) 2015-11-25
WO2013014940A1 (ja) 2013-01-31
JP2013024531A (ja) 2013-02-04
EP2738473A4 (de) 2015-01-07
JP5747162B2 (ja) 2015-07-08

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