CA1289627C - Infrared ray and microwave heating appliance - Google Patents
Infrared ray and microwave heating applianceInfo
- Publication number
- CA1289627C CA1289627C CA000501147A CA501147A CA1289627C CA 1289627 C CA1289627 C CA 1289627C CA 000501147 A CA000501147 A CA 000501147A CA 501147 A CA501147 A CA 501147A CA 1289627 C CA1289627 C CA 1289627C
- Authority
- CA
- Canada
- Prior art keywords
- heating
- heat
- radiating
- infrared
- far
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 172
- 230000004044 response Effects 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 description 21
- 238000010411 cooking Methods 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000755093 Gaidropsarus vulgaris Species 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000031070 response to heat Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- H05B6/647—Aspects related to microwave heating combined with other heating techniques
- H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
- H05B6/6494—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors for cooking
-
- 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
- H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
Abstract
ABSTRACT OF THE DISCLOSURE
A heating appliance including a first heating source for heating all object, and a second heating source for heating the object in response to the operation of the first heating source by radiating infrared rays in response to energy from the first heating source.
A heating appliance including a first heating source for heating all object, and a second heating source for heating the object in response to the operation of the first heating source by radiating infrared rays in response to energy from the first heating source.
Description
2~
The present lnvention relates to a heating appliance, e.g. a microwave oven, a convection oven, etc.
and, more particularly, to a heating appliance ~dhich heats a food by infrares~ rays, especially far-infrared rays.
In a microwave oven, although the heating period for cooking food can be reduced, as compared to other types oE ovens, because Inicrowaves have higll energy, the ~ood being cooked may be unevenly heated ~ecause of the waveleng th of the mi crowaves being too long . In a convection oven, heat from a convection heating means may not reach into the interior oE the food, so that the food may be nonun i f ormly hea ted .
~ccordingly, it is an object of the present invention to provide a heating appliance which counteracts the uneven heating oE food and which can reduce the heating time.
The present invention will become more readily apparent frotn the detailed description given ~hereinafter.
It should be understood, however, that the detailed description of and speci~ic examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modi~ications within the spirit and scope oE the invention will become apparent to those skilled in the art Erom this detailed description.
The present invention provides a heating appliance cornprising, first heating means Eor heating an object, and second heating means Eor lleating the object in response to the operation of the f irst heating means by 3U receiving energy Erom~ the first heating means and by radiating infrared rays.
The second heating means may Lnclude heat radiating means for radiating heat in response to energy Erom the f irst heating means, and infrared radiating means for radiating infrared rays in response to the heat rom the heat ra(:liating means. The heating appliance may also include means for filtering Ear-infrared rays among the inErared rays.
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, ~L;~ 2d~ ~7 The present invent.ion Eurther provides a heating appliance comprising, means for generating mlcrowaves and for heating an ob ject , heating means for heating the oh ject by receiving the microwaves in addition to the 5 microwave heating, the heating means comprising, means for absorbiny tlle microwaves, means ~Eor radiating heat according to the amount oE the mlcrowaves, and inrared radiating means, di~;posed on the heat radiating means for radiating infrarecl .rays according to the heat Erom the 10 he~t radiating means.
The heating app:Liance may include means for Eiltering far-infrared rays e.mong the inErared rays. A
microwave passage opening may be provided in the second hea ti ng means .
The invention still Eurther provides a heating appliance comprising, heater means for heating air and for heating an ob ject, convection fan means for blowing the hot air into a heating chamber, and inErared radiating means disposed on the path of the hot air, the inErared 20 radiat:ing means comprising, means for collecting heat frotn the hot air, heat radiating means for radiating heat according to the heat oE the heat collecting means, and infrared ray radiating means for radiating infrared rays in response to the heat oE the heat r~diating means.
The present invention will be better understood Erom the detailed description of embodiments thereof given hereinbe].ow and shown in the accompanying drawings, which are given by way oE ill.ustration only and thus are not li.mitative o.E the present invention and wherein:
E~'igure 1~ a ) shows a sectional view oE a heating appliance according to a first embodiment of the present inven t.ion;
Figure 1 ( b) 5hows a plan vlew of a heating plate used in the heating appliance of Figure l~a);
Figure l(c) shows a sectional view of the heating plate of Figure 1 ( b);
. . .
~289~7 Iiigure 2(a) StlOWS a sectional view of a heating appliance according to a second embodiment of the present invention;
.~igure 2(b) shows a sectional view oE a heating plate used ln the heating appliance o.E Figure 2;
Figure 3 shows a plan view o:E the heating plate whell the position oE a microwave passing hole is changed;
Figures 4(a), 4(b) and 4(c) show plan views of the heating plate when the shape oE the m.icrowave passing .1.() ~lole i.5 changed;
Eigures 5(a), 5(b) ancl 5(c) show p].an views oE
the heating plate when the number o the microwave passing holes are changed;
Figure 6 shows a sectional view o:E a heating appliance accoraing to a third emhodiment oE the present invention Figure 7 shows a sectional view oE a Ear-inrared ray radiating board used in the heating appliance oE Figure 6, Figure 8 shows a sectional view of a food heated by the heating appliance o.E the present inventioll;
Figure 9 shows a sectional view of a heating appliance according to a :Eourth embodiment oE the present invention; and Figures 10(a) and 10(b) show an enlarged sectional view and an enlarged :Eront view, respectively, of a far-in.Erared ray radiating board used in the heating appliance of Figure 9.
The embodiments oE the present invention applied .30 to a microwave oven and a convection heat.ing apparatus will be described below. The present invention i~, however, not liml.ted to microwave ovens and convection heating apparatuses. ~hus, the present invention may for example be applied to a device including means Eor applying energy to cause infrared rays to be radiated from an infrared ray radiating member. In the present invention, infrared ray heating is carried out in addition to microwave heating or convection heating, etc. A food .
, .
.
6~7 ls uniEormly heated by inErared rays because oE the short wavelength oE far-inErared rays. Also, the interior of the Eood ls eEficiently heated by tlle infrared rays.
~ first embodiment of the present invention applied to ~ microwave oven wlll be described below with reEerence to Figures l(a) and L(c). As stlown in those figures, an infrared ray heating type microwave oven comprises an oven housing 10 including a heating chamber 7, a microwave generator 1 including a magnetron, a waveguide la for introduclng microwaves Erom the microwave generator 1 into the heating chamber 7 and a heating plate 2 which is heated by tlle microwaves Erom the microwave generator 1 and which functions as an infrared ray radiator. A table 9 is provided in the heating chamber 7 for supporting a Eood 11 to be heated. The table 9 may be a turntable.
The heating plate 2 comprises a heat radiating plate 3 made, for example, of a ferrite material for absorbing the microwaves from the microwave generator 1 and for radiating heat, an inErared radiator 4 laminated on the heat ra~iating plate 3 and made, Eor example of a ceramic material, for radiating infrared rays in response to heat conducted from the heat radiating plate 3, and a far-infrared ray filtering member 5 layered on the inErared ray radiator 4, for Eiltering or pa~ssing far-infrared rays among the infrare~ rays produced from the infrared radiator 4. ~n opening 29 for the passage oE
microwaves is Eormed at substantially tlle center portion oE the heating plate 2.
More particularly, the material oE the heating plate 2 is an Fe-Ni-~l-type alloy member, a ceramic rnember laminated on the alloy memher, and a silicon-type metal, having a high transmission frequency range, laminated on the ceramic member. The F'e-Ni-Al alloy rnember, having a relatively high electromagnetic wave absorption factor and a relatively higtl heating value, is provided as the heat radlating plate 3. The ceramic member, having a relatively high infrare(~ ray ra~iation factor, is provided , ' ~2~3~6~
as the infrared ray radiator 4. The silicon-type metal whictl re[lects near-infrared rays, having much heat Erom the infrared rays and passes the far-in~rared rays used for a uniEorlll heating is provided as tl~e far-infrared ray filtering melllber 5.
Tlle lleating plate 2 is fixed to an upper wall or rooE 8a of the heating cllamber 7 by a connecting member 6.
The heating plate 2 may be detachably provided in the heating chamber 7 so that tl~e microwaves are applied to the heat radiatiny plate 3 of the heating plate 2.
ThereEore, the heat radiat;ng plate 3 is faced with a microwave introducing portion 7c. The table 9 is disposed on a bottom wall 8b oE the heating chamber 7. The Eood ll to be heated is disposed on the' table 9. The microwave yenerator l is provided at the outside and upper portion of the side wall 8 of the heating chamber 7. One end of the waveguide la is connected to the microwave generator l, and the other end of the waveguide 1A is securely connected to the peripheral portion of the microwave introducing portion 7c of the upper wall 8a of the heating chamber 7. The mlcrowave introducing portion 7c has a plurality of punched holes.
In the above construction, when heating, the microwaves produced by the microwave generator l are applied into the heating chamber 7 from the microwave introducing portion 7c through the waveyuide la. A part of the microwaves is applied to the surface oE the heat radiating member 3 oE the heating plate 2. Th~ remaining microwaves are applle~ to the food IL to he heated through the microwave pas~ing opening 2a or by reElection Erom the walls oE the heating chamber 7. The microwaves applied to the heat radiating member 3 oE the heating plate 2 are absorbed by the heat radiating plate 3 so that the heat radiating plate 3 starts to radiate heat. The heat from the heat radiating plate 3 is introduced to the lnfrared ray radiator 4. The infrared ray radiator ~ is heated so that it becomes red and starts to radiate infrared rays.
The far-in~rared rays are passed by the far-infrared ray : .
.
~L28~6~7 fiLterin(3 member 5. The near~ Lrared rays are reElected by the ~ar-illErared ray Elltering member 5. Both the microwaves and the far-infrared rays are applied to the Eoo(l, ~,o tllat ttle food call be uniEormly heated by both the microwaves arlcl the far-inErared rays ~uring a relatively sllort perio(l of time. ~s both the mlcrowave heating and the far-inErared heating are a radiant-type heating operation, the energy loss may be reduced in comparison with convection heatillg or heat transfer heating.
ThereEore, the heat energy penetrates into the interior of the Eood so as to heat the Eood. The food can be uniEormly heated without being overdone because the temperature difference between the exterior and the interior of the food is reduced.
~ second embodiment of the present invention will be described below with reEerence to Figures 2(a) and 2(b). In the second embodiment, the heating plate 2 is bent or curved into a round shape so that the far-infrared rays produced from the heating plate 2 are concentrated on the Eood 11 by the curved surface of the heating plate 2.
In Figures 2ta) and 2tc), components common to Figures l(a) and l(b) are given the same reEerence numbers.
In the ~irst and second embodimellts, the openings 2a for introducing the microwaves into the heating challlber 7 may be modified as shown in Figures 3 and 4(a) ttrough 4(c3. As stlown in Figure 3, the opening 2a may be eccentrically located. As shown in Figures 4(a) through 4(c), the size Oe the opening 2 may be varied.
Ttle heating characteristic can be selected by changing the size oE the openiny 2a. For example, Le the size oÇ the opening 2a becomes greater, the heating characteristic becomes more similar to microwave heating. If the size of the opening 2a becomes sllla]ler~ the heatir,g characteristic becomes more similar to Ear-inErared heatirlg. ~s sho~n in Figures 5(a3 through 5~c), the number oE the openings 2a may be increased or decreased. The heating characteristic is also predetermined by selecting the number of the openings 2a.
, , 1~ clescribed above, the heating operation of the present invention uses the microwaves and the Ear-infrared rays at the salne time. Z~l.so, the heating amount or the heating charncteristic is controlled by selection of the 5 size oE the opening 2a or the number o~ the openings 2a.
ThereEore, the heating of the present invention prevents the object Erom being unevellly heated arld can reduce the heating time.
Because the radiation of the Ear-infrared rays l0 is eEfected by the heating plate 2, which includes the ~Ear-infrared ray f iltering member etc., without using an additioncll mernber such as a sheath heater, the wiring is not increased and the power of a power source is not increased in comparison with a conventional microwave 15 oven. Also, since only the heating plate 2 is used for the radiation of the infrared rays, the present invention can be applied to a conventional microwave oven.
As described above, a heating appliance comprises the microwave generator and the heating plate 20 heated by tlle microwaves from the microwave generator through the waveguide. ~he heating plate coZnprises the heat radiating plate for absorbing the microwaves from the microwave generator and for producing the heat and, the infrared radiator laminated on the heat radiating plate 25 for radiatlng the infrared rays in response to heating by conduction heat Erom the heat radiating plate. The opening Eor passing the microwaves may be formed on the heFI t i ng pla te ~
In the above-described embodiments, the far-30 inErared ray filtering member 5 may be eliminated so thatthe Eood is heated by the inErared ray~ including the far-infrared rays. ~lso, the heating plate 2 may be detachably provided on the upper wal l or roof 8a of the heating challlber 7 or elsewllere within the heating chamber 35 7. Tlle helght of the heating plate 2 may be freely changed by using a height control pin (not shown) provided at the connection between the connecting plate 6 and the heating plate 2 for controlling the height of the heating ~ % ~ ?d~7 plate 2. The l~eatinq plate 2 may be disposel such that the microwaves are applie l to the heat radiating plate of the hea ti ng p La te .
rlle thir(l and fourtll embodiments oE the present 5 inventlon al-pl i e d to the convection heating appliance will now be described below witll re~erence to Figures 6 to 10.
ln Figure 6, an inErared ray heating appliance 16 colnprises an oven housing including an oven cavi ty ~ or a heating cllamber) 17, a convection fan 18, heaters 19 and 10 19, and a lleating plate 25 which ~unctions as a Ear-inErared ray radiation panel. Tlle convection Ean 18 ls provided in the oven housing Eor blowing hot air 20 into the hea t i ng chamber 17. The heaters 19 and 19 are provided under and over the convection fan 18, 15 respectively. A convection Ean protection cover 21 is provided at or aajacent the ~Eront of the convection fan 18 for protecting the convection fan 18 and dividing the heating chamber 17 into a convection fan portion and a heating portion. A coolcing dish support 22 is provided on 20 the bottom wall of the heating chamber 17. A cooking dish 23 is disposed on the cooking dish support 22 for carrying a Eood to be heated. The heating plate 25 is provided at the end oE tlle cooking dish 23 ad jacent the convection Ean 18. 7~ fixlng base 2~ is provided at the end oE the 25 heating plate 25 ~for Eixing the heating plate 25 on the cooking dish 23. lrhe Eood 26 to be heated is disposed on tlle cooking disl) 23 in front of the heating plate 25. The heating plate 25 may be integrally connected to the cooking dish 23, or may be detachabl~ disposed on the 30 cooking dish 23 so tl)at the spaces between tl~e convection Ea~ and the tleating plate 25 and between the Eood 26 and heating plate 25 can be adjusted.
As showr) in Figure 7, the heating plate 25 colnprises a heat collecting plate 25a, a heat racliation 35 p] ate 25b, a ceratnic plate 25c, aod an in~rared ray radiation plate 25d. The members 25a, 25b, 25c and 25d are lami nated together . The heat collecting plate 25a is disposed at the hot air output side of the convection fan ' ' , , . ' ~, : ' ~. - -.
~z~
18. The far-infrared ray radiat;ng plate 25d is opposite to the Eood 26. Wherl the heat air Ero~n the convection fan 18 is, first, app]ied to the heat collecting plate 25a, far-infrared rays 27 are radiated from tlle Ear-infrared ra~liatir~g plate 25d.
In the above cotlstruction~ air heate~l by the heaters 19 is blown by tlle convection fan 18. The blown hot air 20 is applied to the heat collecting plate 25a, and the heat oE the hot air 20 is absorbed by the heat coLlecting plate 25a. The heat collected by the heat collecting plate 25a is conducted to the heat radiation plate 25b. The heat radiation plate 25b radiates the heat. The ceramic plate 25c is heated and radiates infrared rays in response to the heat fro~ll the heat radiation plate 25b. The heat (or the infrared rays) oE
the ceramic plate 25c is conducted to the far-infrared radiation plate 25d, so that the far-infrared rays 27 are radiated from the -Ear-infrared radiation plate 25d. The Ear-infrared rays 27 are passed froln the far-in~rared radiation plate 25d and are applied to the food 26. The Ear-infrared ray radiation plate 25 functions as a Ear-inErared EiLtering member such that the near-infrared rays are reflected by the far-infrared ray fiLtering plate 25d and the Ear-infrared rays 27 are passed througtl the far-infrared ray radiation plate 25. The Ear-infrared rays 27 thus radiated are applied to the food 26 which is disposed in front oE the heating plate 25, so that the food 26 is heated. In this case, as shown in Figure 8~ the far~
infrare~ rays 27 are conducted into and heat the interior 29 of the food 26. ThereEore, both the exterior and the interior 29 of the Eood 26 are uniEormly heated by reducing the temperature diEEerence between the exterior 28 and the interior 29 of the Eood.
'~he fourth embol31ment of the present invention will now be described beLow with reference to Figures 9, lOta) and lO(b).
In the Eourttl embodiment, the shape oE the far-infrared radiation pane~ 25 used in the third embodiment ~. ~
;
' ~`2~
is challged. As shown in Figure 10, the components oE the Ear-inrare(l radiatioll panel 25l are the same as the componellt~s oE the Far-in~rared ray radiation panel 25 of the th;rd embodiment~ 'I'he top portion oE the far-infrared radiatiorl plnel 25' is curve-1 so ttlat l:lle Ear-infrared ray radiatioll panel 25' is curvecl. The-far-infrared radiation plate 25d' ~aces in the direction of the center of the food 26. ~9 shown in Figure 9, the far-inErared ray radiation panel 25' is disposed on the cooking dish 23 of the heating chamber 17. Ttle center oE the curve formed by the inside sur~ace oE the panel 25' is substantially coincident with the center oE the Eood 26 The hot air 20 is applied to the rear surface oE
the far-infrared ray radiation panel 25' by the convection fan 18. The heat is conducted to the far-infrared radiation plate 25d' through the heat collecting plate 25a', the heat radiation plate 25b', and the ceramic plate 25c'. The far-infrared rays 27 are radiated from the front surface o~ the Ear-infrared radiation plate 25d'.
20 As sllown in Figure 8~ the interior 29 and the e~terior 28 of the food 26 are uniEorrnly heated by the far-infrared rays in addition to the convection heating. As the far-infrared ray radlation panel 25' is curved, the far-inErared rays 27 are radiated so as to be concentrated on the food 26. ~ccordingly, the food 26 is efEiciently heated.
~ s described above, the ~Ear-infrared ray heating type heating appliance can be applied by the combination of the far-infrared ray radiation panel and the convection heating appllance wLthout adclitional wirings or other additional arran~ement.
In the ttllrd and Eourth embodimer)ts, the Eood 26 may be heated by the inErared rays produced Erom the ceramlc plate 25c or 25c', so that the Ear-infrared ray radiatioll plate 25d or 25d' may be elirninated.
Ernbodiments oE the invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a :
:
6.f~
departure Erom the spirit and scope oE the .invention, and al]. such modifications are intended to be incl~ded within the scope of the following clailns.
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, . . . , . -.
.
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The present lnvention relates to a heating appliance, e.g. a microwave oven, a convection oven, etc.
and, more particularly, to a heating appliance ~dhich heats a food by infrares~ rays, especially far-infrared rays.
In a microwave oven, although the heating period for cooking food can be reduced, as compared to other types oE ovens, because Inicrowaves have higll energy, the ~ood being cooked may be unevenly heated ~ecause of the waveleng th of the mi crowaves being too long . In a convection oven, heat from a convection heating means may not reach into the interior oE the food, so that the food may be nonun i f ormly hea ted .
~ccordingly, it is an object of the present invention to provide a heating appliance which counteracts the uneven heating oE food and which can reduce the heating time.
The present invention will become more readily apparent frotn the detailed description given ~hereinafter.
It should be understood, however, that the detailed description of and speci~ic examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modi~ications within the spirit and scope oE the invention will become apparent to those skilled in the art Erom this detailed description.
The present invention provides a heating appliance cornprising, first heating means Eor heating an object, and second heating means Eor lleating the object in response to the operation of the f irst heating means by 3U receiving energy Erom~ the first heating means and by radiating infrared rays.
The second heating means may Lnclude heat radiating means for radiating heat in response to energy Erom the f irst heating means, and infrared radiating means for radiating infrared rays in response to the heat rom the heat ra(:liating means. The heating appliance may also include means for filtering Ear-infrared rays among the inErared rays.
~ .
, ~L;~ 2d~ ~7 The present invent.ion Eurther provides a heating appliance comprising, means for generating mlcrowaves and for heating an ob ject , heating means for heating the oh ject by receiving the microwaves in addition to the 5 microwave heating, the heating means comprising, means for absorbiny tlle microwaves, means ~Eor radiating heat according to the amount oE the mlcrowaves, and inrared radiating means, di~;posed on the heat radiating means for radiating infrarecl .rays according to the heat Erom the 10 he~t radiating means.
The heating app:Liance may include means for Eiltering far-infrared rays e.mong the inErared rays. A
microwave passage opening may be provided in the second hea ti ng means .
The invention still Eurther provides a heating appliance comprising, heater means for heating air and for heating an ob ject, convection fan means for blowing the hot air into a heating chamber, and inErared radiating means disposed on the path of the hot air, the inErared 20 radiat:ing means comprising, means for collecting heat frotn the hot air, heat radiating means for radiating heat according to the heat oE the heat collecting means, and infrared ray radiating means for radiating infrared rays in response to the heat oE the heat r~diating means.
The present invention will be better understood Erom the detailed description of embodiments thereof given hereinbe].ow and shown in the accompanying drawings, which are given by way oE ill.ustration only and thus are not li.mitative o.E the present invention and wherein:
E~'igure 1~ a ) shows a sectional view oE a heating appliance according to a first embodiment of the present inven t.ion;
Figure 1 ( b) 5hows a plan vlew of a heating plate used in the heating appliance of Figure l~a);
Figure l(c) shows a sectional view of the heating plate of Figure 1 ( b);
. . .
~289~7 Iiigure 2(a) StlOWS a sectional view of a heating appliance according to a second embodiment of the present invention;
.~igure 2(b) shows a sectional view oE a heating plate used ln the heating appliance o.E Figure 2;
Figure 3 shows a plan view o:E the heating plate whell the position oE a microwave passing hole is changed;
Figures 4(a), 4(b) and 4(c) show plan views of the heating plate when the shape oE the m.icrowave passing .1.() ~lole i.5 changed;
Eigures 5(a), 5(b) ancl 5(c) show p].an views oE
the heating plate when the number o the microwave passing holes are changed;
Figure 6 shows a sectional view o:E a heating appliance accoraing to a third emhodiment oE the present invention Figure 7 shows a sectional view oE a Ear-inrared ray radiating board used in the heating appliance oE Figure 6, Figure 8 shows a sectional view of a food heated by the heating appliance o.E the present inventioll;
Figure 9 shows a sectional view of a heating appliance according to a :Eourth embodiment oE the present invention; and Figures 10(a) and 10(b) show an enlarged sectional view and an enlarged :Eront view, respectively, of a far-in.Erared ray radiating board used in the heating appliance of Figure 9.
The embodiments oE the present invention applied .30 to a microwave oven and a convection heat.ing apparatus will be described below. The present invention i~, however, not liml.ted to microwave ovens and convection heating apparatuses. ~hus, the present invention may for example be applied to a device including means Eor applying energy to cause infrared rays to be radiated from an infrared ray radiating member. In the present invention, infrared ray heating is carried out in addition to microwave heating or convection heating, etc. A food .
, .
.
6~7 ls uniEormly heated by inErared rays because oE the short wavelength oE far-inErared rays. Also, the interior of the Eood ls eEficiently heated by tlle infrared rays.
~ first embodiment of the present invention applied to ~ microwave oven wlll be described below with reEerence to Figures l(a) and L(c). As stlown in those figures, an infrared ray heating type microwave oven comprises an oven housing 10 including a heating chamber 7, a microwave generator 1 including a magnetron, a waveguide la for introduclng microwaves Erom the microwave generator 1 into the heating chamber 7 and a heating plate 2 which is heated by tlle microwaves Erom the microwave generator 1 and which functions as an infrared ray radiator. A table 9 is provided in the heating chamber 7 for supporting a Eood 11 to be heated. The table 9 may be a turntable.
The heating plate 2 comprises a heat radiating plate 3 made, for example, of a ferrite material for absorbing the microwaves from the microwave generator 1 and for radiating heat, an inErared radiator 4 laminated on the heat ra~iating plate 3 and made, Eor example of a ceramic material, for radiating infrared rays in response to heat conducted from the heat radiating plate 3, and a far-infrared ray filtering member 5 layered on the inErared ray radiator 4, for Eiltering or pa~ssing far-infrared rays among the infrare~ rays produced from the infrared radiator 4. ~n opening 29 for the passage oE
microwaves is Eormed at substantially tlle center portion oE the heating plate 2.
More particularly, the material oE the heating plate 2 is an Fe-Ni-~l-type alloy member, a ceramic rnember laminated on the alloy memher, and a silicon-type metal, having a high transmission frequency range, laminated on the ceramic member. The F'e-Ni-Al alloy rnember, having a relatively high electromagnetic wave absorption factor and a relatively higtl heating value, is provided as the heat radlating plate 3. The ceramic member, having a relatively high infrare(~ ray ra~iation factor, is provided , ' ~2~3~6~
as the infrared ray radiator 4. The silicon-type metal whictl re[lects near-infrared rays, having much heat Erom the infrared rays and passes the far-in~rared rays used for a uniEorlll heating is provided as tl~e far-infrared ray filtering melllber 5.
Tlle lleating plate 2 is fixed to an upper wall or rooE 8a of the heating cllamber 7 by a connecting member 6.
The heating plate 2 may be detachably provided in the heating chamber 7 so that tl~e microwaves are applied to the heat radiatiny plate 3 of the heating plate 2.
ThereEore, the heat radiat;ng plate 3 is faced with a microwave introducing portion 7c. The table 9 is disposed on a bottom wall 8b oE the heating chamber 7. The Eood ll to be heated is disposed on the' table 9. The microwave yenerator l is provided at the outside and upper portion of the side wall 8 of the heating chamber 7. One end of the waveguide la is connected to the microwave generator l, and the other end of the waveguide 1A is securely connected to the peripheral portion of the microwave introducing portion 7c of the upper wall 8a of the heating chamber 7. The mlcrowave introducing portion 7c has a plurality of punched holes.
In the above construction, when heating, the microwaves produced by the microwave generator l are applied into the heating chamber 7 from the microwave introducing portion 7c through the waveyuide la. A part of the microwaves is applied to the surface oE the heat radiating member 3 oE the heating plate 2. Th~ remaining microwaves are applle~ to the food IL to he heated through the microwave pas~ing opening 2a or by reElection Erom the walls oE the heating chamber 7. The microwaves applied to the heat radiating member 3 oE the heating plate 2 are absorbed by the heat radiating plate 3 so that the heat radiating plate 3 starts to radiate heat. The heat from the heat radiating plate 3 is introduced to the lnfrared ray radiator 4. The infrared ray radiator ~ is heated so that it becomes red and starts to radiate infrared rays.
The far-in~rared rays are passed by the far-infrared ray : .
.
~L28~6~7 fiLterin(3 member 5. The near~ Lrared rays are reElected by the ~ar-illErared ray Elltering member 5. Both the microwaves and the far-infrared rays are applied to the Eoo(l, ~,o tllat ttle food call be uniEormly heated by both the microwaves arlcl the far-inErared rays ~uring a relatively sllort perio(l of time. ~s both the mlcrowave heating and the far-inErared heating are a radiant-type heating operation, the energy loss may be reduced in comparison with convection heatillg or heat transfer heating.
ThereEore, the heat energy penetrates into the interior of the Eood so as to heat the Eood. The food can be uniEormly heated without being overdone because the temperature difference between the exterior and the interior of the food is reduced.
~ second embodiment of the present invention will be described below with reEerence to Figures 2(a) and 2(b). In the second embodiment, the heating plate 2 is bent or curved into a round shape so that the far-infrared rays produced from the heating plate 2 are concentrated on the Eood 11 by the curved surface of the heating plate 2.
In Figures 2ta) and 2tc), components common to Figures l(a) and l(b) are given the same reEerence numbers.
In the ~irst and second embodimellts, the openings 2a for introducing the microwaves into the heating challlber 7 may be modified as shown in Figures 3 and 4(a) ttrough 4(c3. As stlown in Figure 3, the opening 2a may be eccentrically located. As shown in Figures 4(a) through 4(c), the size Oe the opening 2 may be varied.
Ttle heating characteristic can be selected by changing the size oE the openiny 2a. For example, Le the size oÇ the opening 2a becomes greater, the heating characteristic becomes more similar to microwave heating. If the size of the opening 2a becomes sllla]ler~ the heatir,g characteristic becomes more similar to Ear-inErared heatirlg. ~s sho~n in Figures 5(a3 through 5~c), the number oE the openings 2a may be increased or decreased. The heating characteristic is also predetermined by selecting the number of the openings 2a.
, , 1~ clescribed above, the heating operation of the present invention uses the microwaves and the Ear-infrared rays at the salne time. Z~l.so, the heating amount or the heating charncteristic is controlled by selection of the 5 size oE the opening 2a or the number o~ the openings 2a.
ThereEore, the heating of the present invention prevents the object Erom being unevellly heated arld can reduce the heating time.
Because the radiation of the Ear-infrared rays l0 is eEfected by the heating plate 2, which includes the ~Ear-infrared ray f iltering member etc., without using an additioncll mernber such as a sheath heater, the wiring is not increased and the power of a power source is not increased in comparison with a conventional microwave 15 oven. Also, since only the heating plate 2 is used for the radiation of the infrared rays, the present invention can be applied to a conventional microwave oven.
As described above, a heating appliance comprises the microwave generator and the heating plate 20 heated by tlle microwaves from the microwave generator through the waveguide. ~he heating plate coZnprises the heat radiating plate for absorbing the microwaves from the microwave generator and for producing the heat and, the infrared radiator laminated on the heat radiating plate 25 for radiatlng the infrared rays in response to heating by conduction heat Erom the heat radiating plate. The opening Eor passing the microwaves may be formed on the heFI t i ng pla te ~
In the above-described embodiments, the far-30 inErared ray filtering member 5 may be eliminated so thatthe Eood is heated by the inErared ray~ including the far-infrared rays. ~lso, the heating plate 2 may be detachably provided on the upper wal l or roof 8a of the heating challlber 7 or elsewllere within the heating chamber 35 7. Tlle helght of the heating plate 2 may be freely changed by using a height control pin (not shown) provided at the connection between the connecting plate 6 and the heating plate 2 for controlling the height of the heating ~ % ~ ?d~7 plate 2. The l~eatinq plate 2 may be disposel such that the microwaves are applie l to the heat radiating plate of the hea ti ng p La te .
rlle thir(l and fourtll embodiments oE the present 5 inventlon al-pl i e d to the convection heating appliance will now be described below witll re~erence to Figures 6 to 10.
ln Figure 6, an inErared ray heating appliance 16 colnprises an oven housing including an oven cavi ty ~ or a heating cllamber) 17, a convection fan 18, heaters 19 and 10 19, and a lleating plate 25 which ~unctions as a Ear-inErared ray radiation panel. Tlle convection Ean 18 ls provided in the oven housing Eor blowing hot air 20 into the hea t i ng chamber 17. The heaters 19 and 19 are provided under and over the convection fan 18, 15 respectively. A convection Ean protection cover 21 is provided at or aajacent the ~Eront of the convection fan 18 for protecting the convection fan 18 and dividing the heating chamber 17 into a convection fan portion and a heating portion. A coolcing dish support 22 is provided on 20 the bottom wall of the heating chamber 17. A cooking dish 23 is disposed on the cooking dish support 22 for carrying a Eood to be heated. The heating plate 25 is provided at the end oE tlle cooking dish 23 ad jacent the convection Ean 18. 7~ fixlng base 2~ is provided at the end oE the 25 heating plate 25 ~for Eixing the heating plate 25 on the cooking dish 23. lrhe Eood 26 to be heated is disposed on tlle cooking disl) 23 in front of the heating plate 25. The heating plate 25 may be integrally connected to the cooking dish 23, or may be detachabl~ disposed on the 30 cooking dish 23 so tl)at the spaces between tl~e convection Ea~ and the tleating plate 25 and between the Eood 26 and heating plate 25 can be adjusted.
As showr) in Figure 7, the heating plate 25 colnprises a heat collecting plate 25a, a heat racliation 35 p] ate 25b, a ceratnic plate 25c, aod an in~rared ray radiation plate 25d. The members 25a, 25b, 25c and 25d are lami nated together . The heat collecting plate 25a is disposed at the hot air output side of the convection fan ' ' , , . ' ~, : ' ~. - -.
~z~
18. The far-infrared ray radiat;ng plate 25d is opposite to the Eood 26. Wherl the heat air Ero~n the convection fan 18 is, first, app]ied to the heat collecting plate 25a, far-infrared rays 27 are radiated from tlle Ear-infrared ra~liatir~g plate 25d.
In the above cotlstruction~ air heate~l by the heaters 19 is blown by tlle convection fan 18. The blown hot air 20 is applied to the heat collecting plate 25a, and the heat oE the hot air 20 is absorbed by the heat coLlecting plate 25a. The heat collected by the heat collecting plate 25a is conducted to the heat radiation plate 25b. The heat radiation plate 25b radiates the heat. The ceramic plate 25c is heated and radiates infrared rays in response to the heat fro~ll the heat radiation plate 25b. The heat (or the infrared rays) oE
the ceramic plate 25c is conducted to the far-infrared radiation plate 25d, so that the far-infrared rays 27 are radiated from the -Ear-infrared radiation plate 25d. The Ear-infrared rays 27 are passed froln the far-in~rared radiation plate 25d and are applied to the food 26. The Ear-infrared ray radiation plate 25 functions as a Ear-inErared EiLtering member such that the near-infrared rays are reflected by the far-infrared ray fiLtering plate 25d and the Ear-infrared rays 27 are passed througtl the far-infrared ray radiation plate 25. The Ear-infrared rays 27 thus radiated are applied to the food 26 which is disposed in front oE the heating plate 25, so that the food 26 is heated. In this case, as shown in Figure 8~ the far~
infrare~ rays 27 are conducted into and heat the interior 29 of the food 26. ThereEore, both the exterior and the interior 29 of the Eood 26 are uniEormly heated by reducing the temperature diEEerence between the exterior 28 and the interior 29 of the Eood.
'~he fourth embol31ment of the present invention will now be described beLow with reference to Figures 9, lOta) and lO(b).
In the Eourttl embodiment, the shape oE the far-infrared radiation pane~ 25 used in the third embodiment ~. ~
;
' ~`2~
is challged. As shown in Figure 10, the components oE the Ear-inrare(l radiatioll panel 25l are the same as the componellt~s oE the Far-in~rared ray radiation panel 25 of the th;rd embodiment~ 'I'he top portion oE the far-infrared radiatiorl plnel 25' is curve-1 so ttlat l:lle Ear-infrared ray radiatioll panel 25' is curvecl. The-far-infrared radiation plate 25d' ~aces in the direction of the center of the food 26. ~9 shown in Figure 9, the far-inErared ray radiation panel 25' is disposed on the cooking dish 23 of the heating chamber 17. Ttle center oE the curve formed by the inside sur~ace oE the panel 25' is substantially coincident with the center oE the Eood 26 The hot air 20 is applied to the rear surface oE
the far-infrared ray radiation panel 25' by the convection fan 18. The heat is conducted to the far-infrared radiation plate 25d' through the heat collecting plate 25a', the heat radiation plate 25b', and the ceramic plate 25c'. The far-infrared rays 27 are radiated from the front surface o~ the Ear-infrared radiation plate 25d'.
20 As sllown in Figure 8~ the interior 29 and the e~terior 28 of the food 26 are uniEorrnly heated by the far-infrared rays in addition to the convection heating. As the far-infrared ray radlation panel 25' is curved, the far-inErared rays 27 are radiated so as to be concentrated on the food 26. ~ccordingly, the food 26 is efEiciently heated.
~ s described above, the ~Ear-infrared ray heating type heating appliance can be applied by the combination of the far-infrared ray radiation panel and the convection heating appllance wLthout adclitional wirings or other additional arran~ement.
In the ttllrd and Eourth embodimer)ts, the Eood 26 may be heated by the inErared rays produced Erom the ceramlc plate 25c or 25c', so that the Ear-infrared ray radiatioll plate 25d or 25d' may be elirninated.
Ernbodiments oE the invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a :
:
6.f~
departure Erom the spirit and scope oE the .invention, and al]. such modifications are intended to be incl~ded within the scope of the following clailns.
.
, . . . , . -.
.
.
Claims (17)
1. A heating appliance comprising:
first heating means for heating an object; and second heating means for heating the object in response to the operation of the first heating means by receiving energy from the first heating means and by radiating infrared rays, and wherein the second heating means comprises:
heat radiating means for radiating heat in response to the energy from the first heating means; and infrared ray radiating means for radiating infrared rays in response to the heat from the heat radiating means.
first heating means for heating an object; and second heating means for heating the object in response to the operation of the first heating means by receiving energy from the first heating means and by radiating infrared rays, and wherein the second heating means comprises:
heat radiating means for radiating heat in response to the energy from the first heating means; and infrared ray radiating means for radiating infrared rays in response to the heat from the heat radiating means.
2. The heating appliance of Claim 1, further comprising:
means for filtering far-infrared rays among the infrared rays.
means for filtering far-infrared rays among the infrared rays.
3. A heating appliance comprising:
means for generating microwaves and for heating an object;
heating means for heating the object by receiving the microwaves in addition to the microwave heating, the heating means comprising:
means for absorbing the microwaves;
means for radiating heat according to the amount of the microwaves; and infrared radiating means, disposed on the heat radiating means, for radiating infrared rays according to the heat from the heat radiating means.
means for generating microwaves and for heating an object;
heating means for heating the object by receiving the microwaves in addition to the microwave heating, the heating means comprising:
means for absorbing the microwaves;
means for radiating heat according to the amount of the microwaves; and infrared radiating means, disposed on the heat radiating means, for radiating infrared rays according to the heat from the heat radiating means.
4. The heating appliance of Claim 3, further comprising:
means for filtering far-infrared rays among the infrared rays.
means for filtering far-infrared rays among the infrared rays.
5. The heating appliance of Claim 3, wherein a hole for the passage of microwaves is provided in the heating means.
6. The heating appliance of Claim 3, wherein the far-infrared ray radiating means is detachably provided.
7. The heating appliance of Claim 3, wherein the infrared ray radiating means is curved.
8. A heating appliance comprising:
heater means for heating air and for heating an object;
convection fan means for blowing the hot air into a heating chamber; and infrared radiating means disposed on the path of the hot air, the infrared radiating means comprising:
means for collecting heat from the hot air, heat radiating means for radiating heat according to the heat of the heat collecting means; and infrared ray radiating means for radiating infrared rays in response to the heat of the heat radiating means.
heater means for heating air and for heating an object;
convection fan means for blowing the hot air into a heating chamber; and infrared radiating means disposed on the path of the hot air, the infrared radiating means comprising:
means for collecting heat from the hot air, heat radiating means for radiating heat according to the heat of the heat collecting means; and infrared ray radiating means for radiating infrared rays in response to the heat of the heat radiating means.
9. The heating appliance of Claim 8, further comprising:
means for filtering far-infrared rays among the infrared rays.
means for filtering far-infrared rays among the infrared rays.
10. The heating appliance of Claim 8, wherein the far-infrared radiating means is detachably provided in the heating chamber.
11. The heating appliance of Claim 8, wherein the infrared radiating means is curved.
12. A heating appliance, comprising:
first heating means for applying heat to an object, and second heating means arranged to receive heat from said first heating means and, in response thereto, to radiate infrared energy to said object, and wherein said second heating means comprises a laminate interposed between said first heating means and said object, said laminate comprising a heat absorbing layer facing said first heating means and an infrared radiator layer responsive to heat from said heat absorbing layer.
first heating means for applying heat to an object, and second heating means arranged to receive heat from said first heating means and, in response thereto, to radiate infrared energy to said object, and wherein said second heating means comprises a laminate interposed between said first heating means and said object, said laminate comprising a heat absorbing layer facing said first heating means and an infrared radiator layer responsive to heat from said heat absorbing layer.
13. A heating appliance as claimed in Claim 12, wherein said second heating means further comprises, on said infrared radiator layer, a far-infrared ray filtering layer for passing far-infrared rays from said infrared radiator layer.
14. A heating appliance as claimed in either Claim 12 or Claim 13 wherein said first heating means comprise a microwave generator.
15. A heating appliance as claimed in Claim 12 wherein said second heating means is formed with an opening for the passage of heat therethrough from said first heating means to said object.
16. A heating appliance as claimed in Claim 15, wherein said far-infrared ray filtering means are curved for concentrating the far-infrared rays on said object.
17. A heating appliance as claimed in either Claim 12 or 13, wherein said first heating means comprises means for heating air and convection fan means for blowing the heated air onto said second heating means.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020624U JPH0317137Y2 (en) | 1985-02-15 | 1985-02-15 | |
| JP60-20624 | 1985-02-15 | ||
| JP60-38013 | 1985-03-15 | ||
| JP1985038013U JPH0322644Y2 (en) | 1985-03-15 | 1985-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1289627C true CA1289627C (en) | 1991-09-24 |
Family
ID=26357603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000501147A Expired - Lifetime CA1289627C (en) | 1985-02-15 | 1986-02-05 | Infrared ray and microwave heating appliance |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US4803324A (en) |
| KR (1) | KR890001269Y1 (en) |
| CA (1) | CA1289627C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2704526B1 (en) | 2012-08-29 | 2016-03-30 | Samsung Electronics Co., Ltd | Cooking apparatus and control method thereof |
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| WO1989002208A1 (en) * | 1987-08-22 | 1989-03-09 | Shusuke Yano | Far infrared ray generator |
| GB8822705D0 (en) * | 1988-09-28 | 1988-11-02 | Core Consulting Group | Microwave-powered heating chamber |
| GB8822706D0 (en) * | 1988-09-28 | 1988-11-02 | Core Consulting Group | Microwave-powered heating chamber |
| US5111012A (en) * | 1989-05-16 | 1992-05-05 | Samsung Electronics Co., Ltd. | Electronic microwave heating apparatus |
| AU8633691A (en) * | 1990-09-11 | 1992-03-30 | Kansas State University Research Foundation | Combination microwave and convection oven and method of using |
| US5272299A (en) * | 1990-09-11 | 1993-12-21 | Kansas State University Research Foundation | Combination microwave and convection oven and method of using |
| US5272302A (en) * | 1991-12-17 | 1993-12-21 | Raytheon Company | Microwave oven with improved cooking uniformity |
| US5296666A (en) * | 1992-05-04 | 1994-03-22 | The Pennsylvania Research Corporation | Microwave heating apparatus having two cavities and method of using the same |
| US5404420A (en) * | 1993-08-10 | 1995-04-04 | Song; Eugene | Cooking oven using far-infrared tube heater |
| US5801362A (en) * | 1994-01-14 | 1998-09-01 | Hudson Standard Corporation | Portable electric oven with fan and motor arrangement for improved heated air flow and motor cooling |
| AU4032497A (en) | 1996-09-03 | 1998-03-26 | Matsushita Electric Industrial Co., Ltd. | Microwave heating device |
| US5793019A (en) * | 1996-10-23 | 1998-08-11 | Driquik, Inc. | Electric infra-red and forced air oven |
| US6114664A (en) * | 1998-07-08 | 2000-09-05 | Amana Company, L.P. | Oven with combined convection and low mass, high power density heating |
| TR200100446T2 (en) * | 1998-08-10 | 2001-07-23 | Arçeli̇k A.Ş. | Microwave oven. |
| SE518761C2 (en) * | 1998-10-15 | 2002-11-19 | Whirlpool Co | Microwave with grill |
| GB2354144B (en) * | 2000-03-23 | 2001-08-22 | Merrychef Ltd | Microwave heating |
| DE10049847B4 (en) * | 2000-04-19 | 2005-12-01 | Lg Electronics Inc. | microwave oven |
| US7235763B2 (en) * | 2004-04-08 | 2007-06-26 | Aga Foodservice Group | Cooking appliance including combination heating system |
| US7375309B2 (en) * | 2005-12-28 | 2008-05-20 | Ag-Way Technologies, Llc | Method and apparatus using microwave energy to heat a target |
| WO2009049081A1 (en) * | 2007-10-09 | 2009-04-16 | Acp, Inc. | Air circuit for cooking appliance including combination heating system |
| US8330083B2 (en) | 2007-11-30 | 2012-12-11 | Hearthware, Inc. | Portable countertop electric oven |
| US8835810B2 (en) * | 2007-11-30 | 2014-09-16 | Nuwave LLC | System and method for a programmable counter-top electric dehydrator |
| US7964824B2 (en) * | 2007-11-30 | 2011-06-21 | Ibc-Hearthware, Inc. | System, method and computer program product for programmable counter-top electric oven |
| CA2720899C (en) * | 2008-04-11 | 2014-07-15 | Fujifilm Corporation | Heat generating body |
| KR101009196B1 (en) * | 2008-08-04 | 2011-01-19 | 한만수 | Charcoal smoke-far infrared radiating oven |
| USD693643S1 (en) | 2010-03-12 | 2013-11-19 | Hearthware Inc. | Power head for a portable countertop electric oven |
| JP2015536434A (en) | 2012-10-11 | 2015-12-21 | ビーティーユー インターナショナル インコーポレイテッド | Microwave and radiant heating hybrid furnace system |
| KR102402039B1 (en) * | 2015-11-16 | 2022-05-26 | 삼성전자주식회사 | Cooking apparatus and control method thereof |
| US11045047B2 (en) | 2017-11-10 | 2021-06-29 | Ron's Enterprises, Inc. | Variable capacity oven |
| PL233736B1 (en) * | 2018-01-04 | 2019-11-29 | Food Robotics Spolka Z Ograniczona Odpowiedzialnoscia | Heating chamber with hybrid preheating system |
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| NL7108793A (en) * | 1970-07-06 | 1972-01-10 | ||
| US3731037A (en) * | 1971-10-29 | 1973-05-01 | M Levinson | Microwave kiln to cook food |
| US3792230A (en) * | 1972-03-30 | 1974-02-12 | Industrial Innovations Inc | Gas-cooled torch lamp |
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-
1986
- 1986-02-05 CA CA000501147A patent/CA1289627C/en not_active Expired - Lifetime
-
1987
- 1987-12-15 US US07/134,551 patent/US4803324A/en not_active Expired - Fee Related
-
1988
- 1988-10-25 US US07/261,903 patent/US4870255A/en not_active Expired - Fee Related
- 1988-11-03 KR KR2019880018135U patent/KR890001269Y1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2704526B1 (en) | 2012-08-29 | 2016-03-30 | Samsung Electronics Co., Ltd | Cooking apparatus and control method thereof |
| EP2704526B2 (en) † | 2012-08-29 | 2019-05-01 | Samsung Electronics Co., Ltd | Cooking apparatus and control method thereof |
| EP3041315B1 (en) * | 2012-08-29 | 2022-10-12 | Samsung Electronics Co., Ltd. | Cooking apparatus and control method thereof |
| US11546976B2 (en) | 2012-08-29 | 2023-01-03 | Samsung Electronics Co., Ltd. | Cooking apparatus and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US4870255A (en) | 1989-09-26 |
| US4803324A (en) | 1989-02-07 |
| KR890001269Y1 (en) | 1989-03-31 |
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