CN1096218C - High frequency heating apparatus and method for controlling same - Google Patents
High frequency heating apparatus and method for controlling same Download PDFInfo
- Publication number
- CN1096218C CN1096218C CN94119349A CN94119349A CN1096218C CN 1096218 C CN1096218 C CN 1096218C CN 94119349 A CN94119349 A CN 94119349A CN 94119349 A CN94119349 A CN 94119349A CN 1096218 C CN1096218 C CN 1096218C
- Authority
- CN
- China
- Prior art keywords
- microwave
- power supply
- heating
- mentioned
- supply port
- 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 - Fee Related
Links
Images
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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
-
- 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
- H05B6/70—Feed lines
- H05B6/705—Feed lines using microwave tuning
-
- 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
-
- 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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/688—Circuits for monitoring or control for thawing
-
- 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
- H05B6/70—Feed lines
- H05B6/707—Feed lines using waveguides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Ovens (AREA)
Abstract
The high-frequency heater has a magnetron for generating the microwaves, openings 9, 10 for emitting the microwaves into the heating chamber, waveguides 6, 7 for transmitting the microwaves from the magnetron to the openings, a changeover switch 12 for directing the microwaves from the magnetron alternately toward the openings during the heating of the object, and a controller for controlling at least the change-over switch such that the microwaves from the magnetron are alternately directed toward the openings according to a predetermined mode. An opening in an annular movable wave guide is also disclosed (figs 24 - 27).
Description
The present invention relates to the thermatron and the control method thereof of carrying out microwave heating, particularly relate to the cooking time that to shorten, improve the thermatron and the control method thereof of temperature homogeneity being placed on the heating object launched microwave in the heating chamber.
Day disclosure communique spy opens clear 5-266977 number and discloses a kind of like this thermatron, near this thermatron heating chamber bottom, be provided with respectively for power supply port the heating object launched microwave with the top, one end of waveguide is connected on these power supply ports, the other end of each waveguide converges mutually and is connected on the microwave source, this fluidic junction is provided with one and makes from the microwave transmission of microwave source and give any one switching device shifter in two above-mentioned power supply ports, at heating object is wine, during liquid such as milk, owing to only use the heating of bottom side power supply port, even and make under the situation that is the liquid heating object, also can heat equably.
Show no matter heating object is solid or the semisolid of not only being made up of liquid according to the result of experiment repeatedly that this heater is done, in heating process to this heating object, distribute the output energy that produces from microwave source if adopt and a plurality of power supply ports are switched, then can also shorten the cooking time and improve temperature homogeneity according to the heating mode of cooking kind.That is, for existing thermatron, still can further shorten the cooking time and improve temperature homogeneity.
The open communique spy of Japan's special permission opens and discloses a kind of existing thermatron on flat 5-54965 number.This thermatron has roughly been offered power supply port at heating chamber central part place, and the microwave that is produced by magnetron 4 is sent to this power supply port by waveguide.In addition, in power supply port, erectly be provided with the metal rotation axis, a roller is connected on this metal rotation axis by a metal mainstay, thereby constitute the roller pillar.This roller pillar rotates along with the rotation of metal rotation axis, thereby makes the rotating disk rotation that is placed on the nonmetal system on the roller, and the microwave of power supply port is supplied with in roller pillar radiation in heating chamber of having passed through the effect of rotation radiating antenna simultaneously.Even the shape of heating object is bigger, for heating efficiently, can be on the top of heating chamber or the side second power supply port is set.
Be equipped with the metal rotation axis between the bottom of heating chamber of above-mentioned existing thermatron and the rotating disk.。Metal mainstay and have pillar and the roller pillar of roller, because by having made this roller pillar microwave radiation in heating chamber of rotation radiating antenna effect, the swept area of microwave is bigger, during wine shape liquid in high wineglass is packed in heating into, exist and be difficult to only to its bottom heating, the big problem of temperature difference up and down.In addition, though second power supply port is set on end face or the side, but can not heat selectively with the cooking the different of kind according to the heating object in the high cup, plane heating object, but carry out same heating, in addition owing to used the roller pillar, and the erection weight transducer also becomes difficulty.
No matter the purpose of this invention is to provide a kind of heating object is solid, semisolid or liquid, all can shorten the cooking time and improve the thermatron and the control method thereof of temperature homogeneity.
Other purpose of the present invention provides a kind of position that can select the exciting mouth according to cooking kind, can efficiently heat these heating objects equably corresponding to the localized heating of the liquid of putting into high container etc. fully, also can make device not typeization and thermatron that can the erection weight transducer.
In order to finish the foregoing invention task, a first aspect of the present invention comprises being arranged on the heating chamber, a plurality of power supply ports from the microwave directive heating object of microwave source; In the process of heating heating object, switch the output control of energy device that distributes from microwave source to above-mentioned a plurality of power supply ports.
Second aspect comprises a plurality of power supply ports from the microwave directive heating object of microwave source of making that are arranged on the heating chamber; Detect the temperature-detecting device of the temperature of above-mentioned heating object; In heating heating object process, with corresponding to the switching frequency of the time per unit of the testing result of said temperature checkout gear be output as above-mentioned a plurality of power supply ports and switch the output control of energy device that distributes from above-mentioned microwave source.
The third aspect comprises being arranged on the heating chamber, a plurality of power supply ports from the microwave directive heating object of microwave source; In the process of heating heating object,, above-mentioned a plurality of power supply ports when switching, make the out-of-work control device of above-mentioned microwave source simultaneously for switching the output energy that distributes from microwave source.
Fourth aspect is a kind of control method, and this method is that a plurality of power supply ports of handle from the microwave directive heating object of microwave source are set on heating chamber; So that in the process of heating heating object, along with heating is constantly carried out, the limit increases above-mentioned a plurality of power supply port and increases the interior switching frequency of time per unit, and switches the output energy that distributes from microwave source.
The 5th aspect is a kind of control method, and this method is that a plurality of power supply ports of handle from the microwave directive heating object of microwave source are set on heating chamber; In the process of heating heating object, along with the process of heating time, the output in above-mentioned a plurality of power supply port time per unit is reduced on the limit, and the limit is switched and distributed from the output energy of microwave source.
The 6th aspect, in above-mentioned the 5th kind of control method, under the situation in the output of above-mentioned each power supply port is lower than the output variable range of above-mentioned microwave source, by regularly chien shih output connect and the combination of output dwell time drops to average output the average output of above-mentioned each power supply port.
The 7th aspect is a kind of output energy control method, and this method is provided with a plurality of power supply ports of handle from the microwave directive heating object of microwave source on heating chamber; So that in the process of heating heating object,, make the rate of change limit of the output energy in the time per unit between above-mentioned a plurality of power supply ports switch the output energy that distributes from microwave source along with constantly carrying out of heating.
The 8th aspect is a kind of method for heating and controlling, and this method is a plurality of power supply ports that are provided with respectively on heating chamber inject heating object from the upper and lower facing to heating object from the microwave of microwave source; So that to heating object,, heat by last power supply port irradiating microwaves again by after the power supply port launched microwave heats down.
The 9th aspect is a kind of output energy control method, and this method is a plurality of power supply ports that are provided with on heating chamber inject heating object from the microwave of microwave source; So that in the process of heating heating object, along with heating is constantly carried out, the limit increases the switching frequency in the time per unit, and output is reduced on the limit, distributes from microwave source so that the limit makes the rate of change limit of the output energy of above-mentioned each power supply port switch further.
The 10th aspect of the present invention is will be input to heating chamber through waveguide from the exciting mouth by the microwave that microwave source produces with being transmitted by waveguide, be placed on microwave heating in the thermatron of the heating object in this heating chamber, when a part that makes above-mentioned waveguide is at least made ring-type, this annulus along the circumferential direction is separated into be fixed on the fixedly annulus and the rotating movable annulus of above-mentioned heating chamber side, and above-mentioned microwave source is connected on the above-mentioned fixedly annulus, and above-mentioned exciting mouth is connected on the above-mentioned movable annulus.
Fig. 1 is the oblique view of internal structure of the 1st embodiment of expression thermatron of the present invention.
Fig. 2 is the figure of the output wave mode of the expression cooking data example of above-mentioned the 1st embodiment and each power supply port.
Fig. 3 is expression as the figure of the output wave mode of the cooking data example of the comparative example of above-mentioned Fig. 2 and each power supply port.
Fig. 4 represents to amplify the figure of the output waveform of each power supply port among above-mentioned Fig. 2.
Fig. 5 is the flow chart for the heating control action that above-mentioned the 1st embodiment is described.
Fig. 6 is the figure of the output waveform of the expression cooking data example of the 2nd embodiment of the present invention and each power supply port.
Fig. 7 is expression as the figure of the output waveform of the cooking data example of the comparative example of above-mentioned Fig. 6 and each power supply port.
Fig. 8 is the figure for the waveform of the output energy of each power supply port that above-mentioned the 2nd embodiment is described in further detail.
Fig. 9 is the figure of output shape of each power supply port of the 3rd embodiment of the present invention.
Figure 10 is expression by in institute chien shih output turn-on time and export the figure of the output waveform under the situation of output mode that dwell time alternately realizes above-mentioned Fig. 9 regularly.
Figure 11 is the oblique view of internal structure of the thermatron of expression the 4th embodiment of the present invention.
Figure 12 is the flow chart of the heating control action of above-mentioned the 4th embodiment of explanation.
Figure 13 is the figure of output mode of each power supply port of expression the 5th embodiment of the present invention.
Figure 14 is the figure of output mode of each power supply port of expression the 6th embodiment of the present invention.
Figure 15 is the figure of output mode of each power supply port of expression the 6th embodiment of the present invention.
Figure 16 is the figure of the thawed state of expression the 7th embodiment of the present invention.
Figure 17 is the figure of the switching device shifter of exploded representation the 8th embodiment of the present invention.
Figure 18 is the oblique view after the ring-type rectangular waveguide tube portion of the power supply port of expression thermatron of the present invention cuts away a part.
Figure 19 is the longitudinal section of above-mentioned ring-type rectangular waveguide tube portion shown in Figure 180.
Figure 20 is with respect to the sectional view of the installment state of the ring-type rectangular waveguide of heating chamber among the above-mentioned embodiment shown in Figure 180 of expression.
Figure 21 is the oblique view after cut away the part of the 1st modified example of expression ring-type rectangular waveguide shown in Figure 180.
Figure 22 is the longitudinal section of above-mentioned ring-type rectangular waveguide tube portion shown in Figure 21.
Figure 23 is the sectional view of the installment state of the above-mentioned ring-type rectangular waveguide shown in Figure 21 of expression.
Figure 24 is the oblique view after cut away the part of the 2nd modified example of expression ring-type rectangular waveguide shown in Figure 180.
Figure 25 is the oblique view after cut away the part of the 3rd modified example of expression ring-type rectangular waveguide shown in Figure 180.
Figure 26 is the oblique view after cut away the part of the 4th modified example of expression ring-type rectangular waveguide shown in Figure 180.
Figure 27 is the oblique view after cut away the part of the 5th modified example of expression ring-type rectangular waveguide shown in Figure 180.
Below, embodiments of the invention are described with reference to the accompanying drawings.Fig. 1 represents the structure as the electronic oven of thermatron of the present invention the 1st embodiment.
Be provided with magnetron 4 on sidewall 2 outsides of the heating chamber 1 of this electronic oven as the microwave source that produces microwave, and as the switching device shifter of the switch means of waveguide 7 sides of waveguide 6 sides that will switch to the top from the direction of propagation of the microwave of magnetron 4 and below.In the Machine Room that is provided with magnetron 4 grades, be provided with as control circuit (microcomputer) for abridged control device among the figure of this magnetron 4 of control and switching device shifter etc.Be formed with the power supply port 9 (top power supply port) of launched microwave on the front end of top waveguide, this power supply port 9 is positioned at the top of sidewall 2 and opening on heating chamber.Following waveguide is connected on the waveguide 8 of bottom of heating chamber, is formed on power supply port 10 (bottom power supply port) on the front end of this waveguide 8 and almost is positioned at the place, centre position of bottom surface 3 of heating chamber and opening on heating chamber.The 11st, rotating disk is made by the permeable material of microwave.
Adding of heating object pined for, and waveguide 7 and last waveguide 6 switch respectively switching device shifter downwards in order to transmit microwave.Switch to downward waveguide 7 at switching device shifter and transmit under the situation of microwaves, the microwave that is produced by magnetron 4 passes to waveguide 7 and 8 and inject in the heating chamber from power supply port 10 from waveguide 5 through switching device shifter.Switch to when upwards waveguide 6 transmits microwaves at switching device shifter, produce the writing paper microwaves by magnetron 4 and pass to waveguide 6 and inject in the heating chamber through switching device shifter through power supply port 9 from waveguide 5.
Fig. 2 represented in aforesaid thermatron on switch the data that 15 freezing samples are thawed and heat up between power supply port 9 and the following power supply port 10.Fig. 3 has represented a comparative example, and its expression is only from the data of top power supply port 9 launched microwave heated food in heating chamber.In the table of Fig. 2 (b), Fig. 3 (b), represent respectively so-called side temperature eight freezing samples of peripheral part mean temperature and so-called in the final mean temperature of Zhou Wendu at 6 points between peripheral part is concentricity.Shown in Fig. 2 and 3,,, 4 minute 20 second can be shortened to 3 minute 40 second from magnetron heating time by between last power supply port 9 and following power supply port 10, switching and heated food along with the process of time.And temperature difference (maximum temperature of freezing sample deducts the temperature of minimum temperature when finishing from heating) is reduced to 21 from 21 degree.5 degree.Thus,, switching under the situation of while heated food between last power supply port 9 and the following power supply port 10, can shorten the cooking time, improve temperature homogeneity by switching device shifter along with the process of time.
Fig. 4 is the enlarged drawing of heating mode of above-mentioned Fig. 2 of expression (b), and Fig. 5 is the flow chart during to the heating end after to be expression be put into actual food on the rotating disk in the cooking room 1.Fig. 5 (a) is a main flow chart, and Fig. 5 (b) is part-time subprogram.
At first, 15 in freezing sample is put in the cooking room 1.Be T needed total heating time when setting began to end of cooking from cooking time of food.Total heating time T with the condition segmentation (step 20) of T1＞T2=T3.T1, T2, T3 are followed successively by T1, T2, T3 heating time since the heating time after the segmentation.In initial heating time T1, set from the time of last power supply port 9 heated foods be t1, from the time of power supply port 10 heated foods is t1 ' (step 21,22) down.And in subsequently heating time among the T2, set from the time of last power supply port 9 heated foods be t2, from the time of power supply port 10 heated foods is t2 ' (step 23,24) down.In heating time T3, set from the time of last power supply port 9 heated foods be t3, from the time of power supply port 10 heated foods is t3 (step 25,26) down.According to the time of as above setting, to switch between the power supply port 9 and 10 up and down and heating successively, finish (step 27-39) heating time, and the cooking of freezing sample is also just finished.Adopting heating mode shown in Figure 4 to come under the situation of heated food, can shorten the cooking time and improve temperature homogeneity.
In a such microwave heating equipment, wherein each power supply port is arranged under the situation of any one side of bottom surface, end face, side and back of heating chamber, power supply port has more than two, and has by switching device shifter and respectively microwave is switched handoff functionality to each power supply port; Being divided into the n section heating time of food, and successively be assumed to T1, T2, T3...Tn from the heating beginning heating time after the segmentation.Heating time, T1, T2, T3...Tn had enough heating times that microwave is injected heating time in the heating chamber from each power supply port on sidewall of being arranged on heating chamber etc.Give each power supply port by switching device shifter with microwave transfer.By add the earth set T1 〉=T2 〉=T3... 〉=Tn (〉=in＞comprise once more than) and, can reach the purpose that shortens the cooking time same as described abovely and improve temperature homogeneity along with the switching frequency of the continuity time per unit of heating time.
Fig. 6 represents second embodiment of the present invention to Fig. 8.Present embodiment is the output of time per unit to be diminished and switch with the process along with the time to distribute the embodiment that controls a plurality of power supply ports from the output energy mode Lay of magnetron 4.Represent at Fig. 6, in the microwave heating equipment of structure shown in the above-mentioned figure, by switching device shifter respectively upwards power supply port 9 and following power supply port 10 switch microwaves, and make its result who injects the freezing sample 500g of heating in the heating chamber and by the switching device shifter heating mode of power supply port 9 and following power supply port 10 switching supply microwaves upwards respectively.Fig. 6 (c) is the heating mode of last power supply port 9, and Fig. 6 (d) is the heating mode of following power supply port 10.Fig. 7 has represented a comparative example, microwave only from last power supply port 9 enter heat in the heating chamber freezing sample 500g add thermal result and from the heating mode of last power supply port 9 launched microwaves.Uncle (mother's brother) such as Fig. 6 are shown in 7, along with the continuity of time, by coming heated food can be shortened to 4 minute 19 second from 6 minutes and 48 seconds heating time switching between the power supply port 9 and 10 up and down.And temperature difference narrows down to 8 degree from 14 degree.Like this,, reduce and switching under the situation of taking heated food between last power supply port 9 and the following power supply port 10, can shorten the cooking time and improve temperature homogeneity by switching device shifter in the output variable that makes time per unit along with the process of time.
Below, with Fig. 8 it is described further.At first, food is placed on the rotating disk 11 in the cooking room 1, according to setting total output ENERGY E o by detected weight of weight sensor and the cooking kind that is set on the plate face.Then, according to setting total heating time of the T that makes as illustrated in fig. 8 under the situation that output reduces in time by following formula from total output ENERGY E o of food necessity and Pmax.
T=2Eo/Pmax is Pmax wherein: maximum output is one section being divided into every n second total heating time, and the output ENERGY E k of the heating time of k section is tried to achieve by following formula.
Ek=2Eo (n-k+1/2) n
2Respectively be E from last power supply port 9 with from the microwave energy that descends power supply port 10 to inject heating chamber respectively
k* 1/2.Fig. 8 (b), (c) represent heating mode.The heating mode of power supply port 9 in Fig. 8 (b) expression, Fig. 8 (c) expression is the heating mode of power supply port 10 down.Utilizing above-mentioned heating mode to come under the situation of heated food, just can shorten the cooking time and improve temperature homogeneity.Being divided into n each section of second total heating time, under the situation that lack than n last heating time second, can be cast out last heating time.
Yet, even also can reduce output pro rata as described below also passable with the time according to as described below.Being divided into the n five equilibrium the total heating time behind the end of cooking when food cooking begins.In each heating time after segmentation, and the summation that supposition is injected the output energy of food from each power supply port begins to be followed successively by E1, E2...En from the cooking.E1 〉=E2 〉=... 〉=En (〉=in＞comprise once more than) time, can shorten the cooking time, improve temperature homogeneity.
Fig. 9 and Figure 10 represent the 3rd embodiment of the present invention.Present embodiment is under the situation of the output variable range that makes magnetron of the output at each power supply port, by exporting the combination of turn-on time and output opening time at the appointed time, drops to the output of each power supply port up to average output.Promptly in the electronic oven of above-mentioned Fig. 1 structure, from on power supply port 9, down the output sum of power supply port 10 is the immutable microwave heating equipment below 400W, (this figure (a) goes up power supply port with Fig. 9, (b) power supply port under) under the situation of the heating mode heated food of expression, in fact take heated food with heating mode shown in Figure 10.For the following output of 400W in output mode, can be good by following mode.P is the output below the 400W that wants to set.Be output as P, be under the situation of t turn-on time,
t
on＝t*P/P
min。
t
Off=t-t
OnP
Min: the minimum possible output valve of output is being 400W a bit, t
On: be the turn-on time of output P, t
Off: the time that output disconnects, make t
OnAnd t
OffRespectively as combining turn-on time and opening time
Now with furthermore bright this embodiment of Figure 10.Figure 10 (a) is the output of going up power supply port, and Figure 10 (b) is the output of power supply port down.As shown in Figure 9, from 80 seconds to 100 seconds of heating beginning 20 seconds, under last power supply port output 300W and the situation that continues 20 seconds, as shown in figure 10, and export with 400W from 80 seconds to 95 seconds of when beginning heating 15 seconds, by set disconnecting back 5 seconds output, just can make on average to be output as 300W when heating begins 80 seconds to 100 seconds 20 seconds.The situation of following power supply port also is the same, as shown in Figure 9, from 100 seconds of when beginning heating to 120 20 seconds, under the situation of following power supply port output 300W energy and lasting 20, as shown in figure 10, output 400W and continue 15 seconds in 15 seconds 100 seconds to 115 seconds of when beginning heating disconnects 5 seconds output by setting, and just can make on average to be output as 300W when heating begins 100 to 120 seconds 20 seconds.
Figure 11 and 12 expressions the 4th embodiment of the present invention.As shown in Figure 1, the furnace roof portion of the heating chamber of the electronic oven of present embodiment is provided with a detection and is placed on food temperature on the rotating disk 11, for example temperature-detecting device 15 of food surface temperature.About the microwave heating equipment of this structure, the situation that the heating mode of the last power supply port that utilizes Fig. 4 explanation of having made up above-mentioned the 1st embodiment and following power supply port is cooked 15 freezing samples is described with the flow chart of Figure 12.At first,, 15 freezing samples are placed on the rotating disk 11.If the needed time be T when food begins to cook food cooking and finishes.The switching times of going up power supply port 9 and following power supply port 10 during initial the heating is had by temperature-detecting device 15 detection food temperatures not reach 2-3 degree (step 40-50) for once then.If be Ta the heating time when beginning to this from the cooking, be Tb later heating time, in heating time 0Tb folding scope, switches secondary between last power supply port and the following power supply port, that is, step 51-58 carries out secondary repeatedly and takes heated food (step 59[A] expression step 51-58 subprogram).By adopting a such heating mode to take heated food, just can shorten heating time and improve temperature homogeneity.By detect the temperature that is placed on the food in the heating chamber 1 by temperature-detecting device, just can increase the heating time of each power supply port corresponding to food temperature, promptly increase switching frequency and the output energy of unit interval, can take heated food with only heating mode according to food temperature.
Figure 13 represents the 5th embodiment of the present invention.In the present embodiment, in the process of heating heating object, along with the process of heating time, make the rate of change of output energy of the time per unit of each power supply port, the output energy of distribution from magnetron 4 switched on the limit between a plurality of power supply ports.In the microwave heating equipment shown in the above-mentioned figure, at first, food is rotated on the rotating disk 11 in the heating chamber 1, then according to setting total output ENERGY E o by detected food weight of weight sensor and the cooking kind that is arranged on the control board.Be set in total output ENERGY E o of food necessity and be shown in total heating time of T under the certain situation of output energy P according to following formula as Figure 13 (a).
T=Eo/P is total heating time n segmentation second by every section, and the output Ek of K section heating time is tried to achieve by following formula.
Ek=P*n is a * Ek and b * ek from last power supply port 9 with from the microwave that following power supply port 10 is launched respectively.A+b=1, a＞0, b＞0, a and b are parameter.The heating mode of Figure 13 (b) expression last power supply port 9 at this moment, Figure 13 (c) expression is the heating mode of power supply port 10 down.For example giving birth under the situation that beef thaws, can make b, diminishing gradually along with the continuity of time.Adopt such heating mode to come to shorten the cooking time under the situation of heated food, improve temperature homogeneity.T is divided into one period heating time second by every n with total heating time, if under the situation that lack than n last heating time second, can cast out last heating time.
Here, though output variable is certain, also can reduce output pro rata with the time by for example.Also can improve the ratio of the output of each power supply port according to the kind of food.In addition, for example also can utilize the described temperature-detecting device of the 4th embodiment, according to the state of food, the output that changes the unit interval of each power supply port diminishes.
Figure 14 and 15 expressions the 6th embodiment of the present invention.In the present embodiment, in the heating process of heating object,, make the switching frequency in the unit interval increase and reduce to export along with the process of heating time, make the rate of change of the output energy between each power supply port simultaneously, and switch the output energy that distributes from magnetron 4 to a plurality of power supply ports.In microwave heating equipment shown in Figure 1, at first, food is placed on the rotating disk 11 in the heating chamber, then according to the total output ENERGY E o that sets by the cooking kind that is provided with on detected food weight of weight sensor and the control board.Be T the wave setting total heating time according to the essential total output ENERGY E o of food heating and Figure 14 (a).This time T is divided into 3 sections, makes each section begin to be respectively T1, T2, T3 from the cooking heating time.Here T1＞T2=T3.The output energy that makes T1 heating time is E1.During heating time T1, from the microwave energy of last power supply port 9 output a*E1 in heating time t1, and from power supply port 10 down at the microwave energy of the interior output b*E1 of t1 ' heating time.A+b=1 wherein, a＞0, b＞0, in heating time T1, a=1/4, b=3/4.Under the situation of t1+t1 '=T1, shown in Figure 14 (b) (going up power supply port), (c) (following power supply port), do not set the time that stops that being output as among the T1 in heating time.Under the situation of t1+t1 '＜T1, shown in Figure 15 (a) (go up power supply port), (b) (following power supply port), in heating time T1, set the time that stops that being output as.According to the kind of food, adopt so that heating mode takes heated food, can shorten the cooking time and improve temperature homogeneity.
Figure 16 represents the 7th embodiment of the present invention.The mode that present embodiment adopts is in above-mentioned microwave heating equipment shown in Figure 1, at first, evenly to thaw by being heated by last power supply port 9 after power supply port 10 heats down again.What Figure 16 represented is the sectional view of freezing tuna, for example, under the situation of freezing tuna of thawing, if begin heating from last power supply port 9, the part of not thawed is arranged owing to the bottom (the non-oblique line part of Figure 16 (a)) of freezing tuna is also residual, even heated by following power supply port 10, possibility of this part of not thawing of microwave penetrating is very high, therefore may not fully thaw (with reference to Figure 16 (a)) again.For this reason, if earlier by power supply port heating down, and such problem can not occur, and can be thawed fully (with reference to Figure 16 (b).
Figure 17 represents the 8th embodiment of the present invention.As shown in figure 17, as successively a plurality of power supply ports being switched the switching device shifter that uses in the electronic oven that takes heated food, using by the rotatable parts that are fixed on fixed part 13 centres are rotated, switch under the situation of switching device shifter of this structure of waveguiding channel, can not arrive any one power supply port by the microwave that magnetron 4 produces at switching device shifter in switching time, cause the adverse effect of returning magnetron 4.For this reason, the transition state when switching is used under the situation of the switching device shifter that has the microwave problem, in transition state, makes magnetron 4 stop to produce microwave, and that moment when finishing switching makes magnetron 4 produce microwaves once more.By so control switching, just can prevent to produce above-mentioned adverse effect.
Below, the concrete structure of the power supply port in the foregoing description is done detailed explanation.
Figure 18 is the oblique view of expression ring-type rectangular waveguide 101, has ignored thickness of slab, and has cut a part in order to be easy to analyze.Figure 19 is the sectional view of waveguide part, has omitted a part of line for being easy to analyze.Figure 20 is the sectional view of the critical piece structure of indication device inside.According to these figure this apparatus structure is described now.The bottom surface of metallic waveguide top panel 102 dual-purpose heating chambers 1 also constitutes the fixation side annulus 101a of ring-type rectangular waveguide 101 top (H face).Metallic waveguide outside wall surface 103 is connected on the metallic waveguide top panel 102, and constitutes the lateral surface (E face) of fixation side annulus 101a.Metallic base plate 104 is connected on the metallic waveguide outside wall surface 103 and constitutes fixation side annulus 101a following (H face).By metallic waveguide internal face 106 being fixed on the metallic rotary bottom plate 105 on the central, circular recess that is configured in this metallic base plate 104 rotationally, with metallic rotor plate 107 is fixed on the metallic waveguide inwall 106, just constituted the movable side ring shape part 101b of annular waveguide 101.So in this example, the H face of ring-type rectangular waveguide 101 defiber 108 that is configured to slightly locate mid portion with this ring center axle (with axle described later 113 co-located) and right angle ring-type rectangular waveguide 101 by the H face along the circumferential direction is separated into fixation side annulus 101a and the rotating movable annulus 101b that is fixed on the heating chamber side.For the magnetron 4 of microwave source is connected on the E face of fixation side annulus 101a by waveguide 109,7 and switching device shifter.By metallic waveguide top panel 102 be also used as waveguide 109 above, by metallic bottom panel 104 be also used as waveguide 109 below.Exciting mouth 111 (waveguide 110 heating chamber side openings) links to each other by the part of waveguide 110 with the metallic waveguide internal face 106 of the E face of movable annulus 101b.In the inboard of the ring-type rectangular waveguide 101 that constitutes by metallic rotary bottom plate 105, metallic waveguide internal face 106, metallic rotor plate 107, waveguide 110 and exciting mouth 111 (below be also referred to as rotor 12), be provided with supporting 114 in the heart with rotational drive train axle 113 outsides of the detection axle that can chimeric mode be enclosed within the double as weight sensor.Axle 113 is connected on the motor double as weight sensor 115.In order to prevent that rotational drive train axle 113 from inserting the microwave leakage of the part in the hole on the metallic base plate 104, is provided with the device for preventing leakage 116 of a circular waveguide tubulose.Among Figure 20 119 is rotating disks, is to be made by the transparent material of microwave.The 120th, put the container of heating object (among the figure for liquid) 121.
Below, the effect with the thermatron that forms as above-mentioned mode is described.Because the defiber 108 of ring-type rectangular waveguide 101 is formed on the substantial middle position of the H face of rectangular waveguide, the microwave that enters heating chamber 117 from this part is considerably less., switch under the situation to following power supply port almost all the injecting in the metal heating chamber 117 of the microwave that produces by magnetron 4 from exciting mouth 111 by above-mentioned switching device shifter for this reason.The exciting mouth be arranged on heating chamber 117 bottom surfaces situation under, can make exciting mouth 111 be positioned at the nearest place of heating object 121 (heating object be placed on the exciting mouth near) carry out localized heating.If to as utilize this characteristic when putting into the liquid heat of dark container 120, though then only heated the partially liq of container 120 bottoms, the liquid of heating produces convection action, stirs and produce the oneself, therefore the temperature difference that heats is less.At this moment, thus can not be heated the reflection of chamber 117 walls and very high can efficiently heating of absorptivity that absorbed by heating object by the microwave that the exciting mouth is launched.In addition, in processes such as the electronic oven cooking, if under the situation that generation liquid food overflows, then because of the central, circular recess of stream at metallic base plate 104, and very little to the microwave circuit influence.Also have no relations even exciting mouth 111 is arranged on bottom surface central authorities, so the use of weight sensor has also become simply.
Figure 21 represents the 2nd modified example of ring-type rectangular waveguide 101, and the E face of ring-type rectangular waveguide is configured to meet at right angles with the central shaft of ring-type, and the exciting mouth links to each other with the waveguide tube wall that becomes the H face on the movable side ring shape part by waveguide.Figure 21 is the oblique view of waveguide part, has omitted thickness of slab and has cutd open a part for ease of analysis.Figure 22 represents the configuration status facing to the waveguide part of heating chamber.And saved time power supply port etc. among Figure 23.The structure of device is described according to these accompanying drawings.Hole 126a connects on the logical unshowned in the drawings microwave source.Metallic exterior panel 123 disposes the endless groove that is connected with waveguide 126, constitutes folding fixation side annulus 122a on the ring-type rectangular waveguide 122 by this groove.Circular depressions 123a is arranged at the top at the groove that becomes fixation side annulus 122a, has inserted a rotating metallic rotor 124 in this recess 123a.The rotor plate 124a double as of this rotor is the wall of heating chamber 1, constitutes movable side ring shape part 122b by being in rotor plate 124a groove on every side.Thus, in the present embodiment, the E face of ring-type rectangular waveguide 122 is configured to meet at right angles with ring center axle (identical with rotation axis described later 129 positions), ring-type rectangular waveguide 122 by on the H face slightly the defiber 125 of core be divided into fixation side annulus 122a and movable side ring shape part 122a.Above-mentioned waveguide 126 is connected on the waveguide tube wall that becomes the H of fixation side annulus face.Exciting mouth 128 is bored on the rotor plate 124a, and is connected by waveguide 127 on the waveguide tube wall of the H face that becomes movable side ring shape part 122b.The center of rotor plate 124a is installed on the rotary motion mechanism 130 by rotation axis 129.Be connected with corner detector (for example, absolute rotary encoder) on the rotation axis 129, so just can detect the angle of rotation of rotor 124, i.e. the turned position of exciting mouth.Though the exciting mouth is connected by waveguide 127 on the waveguide of movable side ring shape part 122b, exciting mouth 128 also can directly be opened on the rotor plate 124a and on the E face of movable side ring shape part 122b.
Because the defiber 125 of ring-type rectangular waveguide 122 be positioned at rectangular waveguide the H face be roughly centre position place, therefore few from the bleed microwave of heating chamber of this part.For this reason, the microwave that is produced by magnetron 4 almost all enters in the heating chamber 1 from exciting mouth 128.Rotate son 124 and rotate by making, can change the position of the exciting mouth 128 on the wall of heating chamber 1.Therefore, can change the exciting pattern of heating chamber 1 according to cooking kind.For example,, under the situation of heating liquid 121, can move to extreme lower position to the exciting mouth, can realize the temperature uniform heating by heating substantially with high container 120 heat wines, milk.Can obtain the effect of agitation blades sample by exciting mouth 128 is rotated continuously under the situation for the heating of thawing of tuna etc.Change the exciting pattern of heating chamber as mentioned above by cooking kind, the just cooking that can evenly heat.
Figure 24 represents the 2nd modified example of ring-type rectangular waveguide 101, the wavelength in pipe of the electrical length in a week of this ring-type rectangular waveguide 101 is set at λ g, and electricity length is set at 3.5 λ g (in n * λ g/2, establishing n=7).Because making the electrical length in a week is 3.5 λ g, therefore, the frequency of the microwave that is produced by magnetron 4 is 2.45[GHz], if make waveguide widely be 78[mm], then wavelength in pipe is about 212[mm], 3.5 λ g then are 742[mm].The corresponding radius of this circumference is about 118[mm], the outer radius r2 of the ring-type rectangular waveguide 101 of this moment is 157[mm], inside radius r1 is 79[mm].The calculating of wavelength in pipe is not carried out just complicatedly more more down when rectangular waveguide has the linearity part, but in the design of the annulus of several wavelength degree, the precision of this degree is very high.
As implied above, a week electricity of ring-type rectangular waveguide 101 is long to be n * λ g/2 if make, and then the microwave that carries out along clockwise direction in ring-type rectangular waveguide 101 and the microwave of advancing the in the counterclockwise direction ground that becomes homophase can have n individual.When making the waveguide 110 that is connected on the exciting mouth 111 that becomes microwave outlet be positioned on the position of this homophase, become to the microwave output of exciting mouth 111 and can become big.In addition, when to make all electrical length be n * λ g/2, can obtain the position that the n point is fit to microwave output.The exciting pattern for heating chamber of the position separately of the exciting mouth 111 of these points has nothing in common with each other, thereby can obtain each different heat characteristic.Separately or along with the continuity of time, utilize this effect then can obtain desired heat characteristic in the switching combining mode.
Figure 25 represents the 3rd modified example of ring-type rectangular waveguide, and the long wavelength in pipe of a week electricity that makes this ring-type rectangular waveguide 101 is that to make electricity length be that 3.5 λ g are (at (n+ (1/m)) to λ g.Establish n=3 among the λ g, m=2).The first exciting mouth 132 and the second exciting mouth 133 are set.Each exciting mouth 132,133 is positioned on the position corresponding to the symmetry of rotation axis not shown in the figures each other, and be so constructed, be electrically connected waveguide on each exciting mouth 132,133 and be connected misplace the each other position phase of λ g of position on the ring-type rectangular waveguide 1.When just an exciting mouth was in the standing wave antinode, another then was in the standing wave node.
As mentioned above, if the electricity in a week of ring-type rectangular waveguide 101 length is (n+ (1/2)).λ g, then the microwave that carries out along clockwise direction in ring-type rectangular waveguide 101 and the microwave of advancing the in the counterclockwise direction ground that becomes homophase can have (2n+1) individual.Big variation.The 1 2nd exciting mouth 132 and 133 o'clock are set, have the side microwave output of two exciting mouths just big, and the output of the microwave of opposite side are just little.Like this, two exciting mouths 132 are worked with 133 mutually auxilliaryly, even no matter much the angle of rotation of exciting mouth is, can both export microwave usually.And the working point for magnetron does not have too big variation when rotating the exciting mouth even still remain under the operating state at magnetron.Shown in above-mentioned embodiment like that, be positioned at bottom of heating chamber almost the localized heating characteristic under the situation in centre position and the heat characteristic of above-mentioned two exciting mouths by combination exciting mouth, just can carry out more uniform heating to plane heating object.
Figure 26 represents 4 modified examples of rate of ring-type rectangular waveguide, and this ring-type rectangular waveguide 101 is ridge waveguides.As shown in FIG., ridge waveguide is on the mid portion of this waveguide recess 134 to be set, and the rectangular waveguide that the height of intermediate portion is reduced.The H face of ridge waveguide both can be recessed symmetrically up and down, also can be recessed into asymmetricly.As Figure 26, under the recessed situation of the H of upside face, the foreign matter (heating objects of liquid food etc.) that enters in the ring-type rectangular waveguide 101 from top defiber 108 just can flow out downwards from following defiber at an easy rate.This ridge waveguide is compared with the rectangular waveguide of identical appearance size, and cut-off frequency is low, and wavelength in pipe λ g will lack when transmitting the microwave of same frequency., compare for this reason, can make its miniaturization with the ring-type rectangular waveguide that the same electrical that is made of rectangular waveguide is long.
Figure 27 represents the 5th modified example of ring-type rectangular waveguide, and is identical with above-mentioned Figure 21, is applied on the rectangular ring-type rectangular waveguide of axle of E face and annulus.In this modified example, the part of the defiber in the middle of becoming slightly along its H in the pipe of ring-type rectangular waveguide 122 has been bent to form the bending part 135 of institute's Fixed width degree.Rotor plate 124a contact is on the wall of heating chamber, and the exciting mouth is directly opened on rotor plate 124a and on the E face of movable side ring shape part 122b.The position of exciting mouth 128 is rotary with respect to rotation axis, and is identical with above-mentioned modified example, and rotating drive mechanism, angle of rotation testing agency are connected on the rotation axis.In addition, among Figure 27 if make the size of representing by d littler than the size of representing by H,, just can obtain the effect identical, and wavelength in pipe can shorten overall dimension r with ridge waveguide
2Also can dwindle.
According to the present invention, when the heating heating object,, therefore, can heat heating object equably and shorten the cooking time because a plurality of power supply ports are switched the output energy that distributes from microwave source, improve temperature homogeneity.In this case, a plurality of power supply ports are switched the output energy that distributes from microwave source by basis corresponding to the switching frequency and the output variable of the detected temperatures of heating object, just can set only heating mode corresponding to the heating object temperature, and can shorten the cooking time, improve temperature homogeneity.
When a plurality of power supply ports being switched the output energy that distributes from microwave source, if microwave source is quit work, even under the switching transition state, use the switching device shifter that has the microwave problem, also can prevent the adverse effect of microwave source to its generation.
In the process of heating heating object, if process along with heating time, in time per unit, increase switching frequency to a plurality of power supply ports, and switching distributes the output energy from microwave source, for example, for the heating object heating of freezing sample etc., just can shorten the cooking time, improve temperature homogeneity.
In the process of heating heating object, if process along with heating time, in time per unit, reduce output to a plurality of power supply ports, and switching distributes the output energy from microwave source, for example, heating object heating for freezing sample etc. can be shortened the cooking time, improves temperature homogeneity.In addition, in the output of each power supply port next time under the situation of the output variable range of microwave source, by fix time in array output connect and output disconnects and closing, can drop to the output of setting for each power supply port to average output.
In the process of heating heating object, if process along with heating time, output energy ratio in the time per unit is changed, and to the output energy of a plurality of power supply ports switching distribution from microwave source, for example, under the situation that living beef is thawed, just can shorten the cooking time, improve temperature homogeneity.
For heating object, at first,, by the microwave emission heating of last power supply port, just can evenly thaw then by by after the microwave emission of power supply port is heated down.
In the process of heating heating object, if process along with heating time, make the switching frequency increase in the time per unit reduce output simultaneously, make further and switch the output energy that distributes from microwave source to the rate of change of the output energy of each power supply port and to a plurality of power supply ports, can cook with only heating mode corresponding to the kind of the heating object of solid, semisolid and liquid etc., can shorten the cooking time, improve temperature homogeneity.
At least a portion that microwave from microwave source is imported the microwave tube of exciting mouth is done circlewise, along the circumferential direction this annulus is separated simultaneously and be fixed on the fixedly annulus of heating chamber side and as rotating movable annulus, and microwave source is connected fixedly on the annulus, the exciting mouth is turned on the movable annulus, by suitably rotating movable annulus, just can freely select the position of exciting according to cooking kind.In addition, by annular waveguide is arranged on the bottom of heating chamber, and movable annulus as the inboard, and make the exciting mouth be positioned at the position of center of rotation by waveguide etc., can form bottom center's exciting mouth, can efficiently carry out localized heating to the liquid of putting into dark container equably.Even, a weight sensor also can be installed on this rotary middle spindle annular waveguide being arranged on the bottom of heating chamber under the situation.
Claims (8)
1. a thermatron is characterized in that, comprises: microwave source; Be provided with the heating chamber that this microwave is incided a plurality of power supply ports on the heating object with the below up; When the microwave of supplying with by above-mentioned at least one power supply port heats heating object, the microwave that above-mentioned other power supply port is come offers the power supply port switching control of heating chamber, and above-mentioned control device is being controlled the ratio of the microwave of supplying with simultaneously from a plurality of power supply ports.
2. a thermatron is characterized in that, comprises: microwave source; Be provided with the below up this microwave is incided by the heating chamber of a plurality of power supply ports on the hot thing; Detect the temperature-detecting device of above-mentioned heating object temperature; When heating object is heated, the power supply port of suitably selecting to supply with the microwave output energy of above-mentioned heating chamber and inject microwave accordingly according to the detected value of said temperature checkout gear output is made the control device that switches, and above-mentioned control device is being controlled the ratio of the microwave of supplying with simultaneously from a plurality of supply ports.
3. a thermatron is characterized in that, comprises: microwave source; Be provided with the heating chamber that this microwave is incided a plurality of power supply ports on the heating object with the below up; In the process that the microwave of supplying with by above-mentioned at least one power supply port heats heating object, switch on one side with shining through above-mentioned other power supply port and the microwave energy that comes from above-mentioned microwave source, and when switching on one side together the ratio of the microwave of supplying with from a plurality of power supply ports, the control device that above-mentioned microwave source is stopped.
4. a thermatron is characterized in that, comprises: microwave source; Be provided with the heating chamber that microwave is incided a plurality of power supply ports on the heating object with the below up; In the process that the microwave of supplying with by above-mentioned at least one power supply port heats heating object, on one side the microwave energy that comes from above-mentioned microwave source is switched to other power supply port, on one side this switching frequency is increased will do to switch to the ratio of the microwave supplied with together from a plurality of power supply ports the time along with the continuity of heating time control device.
5. a thermatron is characterized in that: be provided with microwave source and be provided with the heating chamber that this microwave is incided a plurality of power supply ports on the heating object with the below up; The ratio that has the microwave supplied with together from a plurality of supply ports switches, and along with the continuity of supplying with heating object its heating time of microwave at least with above-mentioned power supply port, on one side the output of the time per unit of microwave source is diminished, Yi Bian select the control device of the above-mentioned power supply port that incident.
6. according to the thermatron of claim 5, it is characterized in that: when above-mentioned control device is lower than the output variable range of above-mentioned microwave source in the output of supplying with from above-mentioned each power supply port, by making microwave time of origin at the appointed time stop the combination of time of origin, and will on average export the output that is reduced to above-mentioned each power supply port with microwave.
7. thermatron is characterized in that: have control device, it is being respectively equipped with the power supply port that can incide the microwave that microwave source comes from the above and below on the heating object on the heating chamber; Facing to heating object, controlling the ratio of the microwave of supplying with simultaneously from a plurality of power supply ports on one side, Yi Bian, heat by last power supply port launched microwave again by after descending the power supply port launched microwave to heat.
8. thermatron, it is characterized in that: this device transmits the microwave that is produced by the microwave power supply vibration with waveguide, and incide heating chamber from the exciting mouth, be placed on heating object in this heating chamber with microwave heating, it is when making ring-type to the part of above-mentioned waveguide at least, this annulus along the circumferential direction is separated into be fixed on the fixedly annulus and the rotating annulus of above-mentioned heating chamber side, and above-mentioned microwave source is connected on the said fixing annulus, and above-mentioned exciting mouth is received on the above-mentioned rotatable ring-type part.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP284957/93 | 1993-11-15 | ||
| JP28495793A JPH07142164A (en) | 1993-11-15 | 1993-11-15 | High-frequency heating device and its controlling method |
| JP312080/93 | 1993-12-13 | ||
| JP31208093A JPH07161469A (en) | 1993-12-13 | 1993-12-13 | High frequency heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110463A CN1110463A (en) | 1995-10-18 |
| CN1096218C true CN1096218C (en) | 2002-12-11 |
Family
ID=26555686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119349A Expired - Fee Related CN1096218C (en) | 1993-11-15 | 1994-11-15 | High frequency heating apparatus and method for controlling same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR950016447A (en) |
| CN (1) | CN1096218C (en) |
| GB (1) | GB2284133B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2354144B (en) | 2000-03-23 | 2001-08-22 | Merrychef Ltd | Microwave heating |
| FR2822337B1 (en) * | 2001-03-13 | 2003-10-17 | Moulinex Sa | MICROWAVE HEATING OVEN |
| EP2393339B1 (en) * | 2010-06-04 | 2016-12-07 | Whirlpool Corporation | Versatile microwave heating apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05266977A (en) * | 1992-01-23 | 1993-10-15 | Toshiba Corp | High frequency heater |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549849A (en) * | 1969-02-20 | 1970-12-22 | Technology Instr Corp Of Calif | Microwave heating apparatus and energy distribution means therefor |
| EP0037643A1 (en) * | 1980-03-26 | 1981-10-14 | THORN EMI Domestic Appliances Limited | Improvements in microwave cookers |
| JPS58175725A (en) * | 1982-04-07 | 1983-10-15 | Matsushita Electric Ind Co Ltd | Microwave heater device |
| US4427867A (en) * | 1982-12-03 | 1984-01-24 | General Electric Company | Power divider for microwave oven |
-
1994
- 1994-11-15 CN CN94119349A patent/CN1096218C/en not_active Expired - Fee Related
- 1994-11-15 KR KR1019940030125A patent/KR950016447A/en not_active Application Discontinuation
- 1994-11-15 GB GB9423263A patent/GB2284133B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05266977A (en) * | 1992-01-23 | 1993-10-15 | Toshiba Corp | High frequency heater |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950016447A (en) | 1995-06-17 |
| GB9423263D0 (en) | 1995-01-04 |
| GB2284133B (en) | 1998-03-04 |
| GB2284133A (en) | 1995-05-24 |
| CN1110463A (en) | 1995-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101910731B (en) | Cooking device | |
| KR100367585B1 (en) | Heating device for microwave oven | |
| CN1096218C (en) | High frequency heating apparatus and method for controlling same | |
| JP2007227134A (en) | Microwave heating device | |
| CN206989271U (en) | Multi-surface heating micro-wave oven | |
| WO1995015671A1 (en) | Apparatus and process for performing a chemical reaction | |
| KR100366022B1 (en) | Turn table driving apparatus for a microwave oven and microwave oven having this | |
| CN1127868A (en) | Method for controlling the microwave feed in a microwave oven, and microwave oven with such control | |
| JP2001345171A (en) | High frequency heating system | |
| JP3808791B2 (en) | High frequency heating device | |
| KR100315392B1 (en) | microwave oven | |
| JP3558041B2 (en) | High frequency heating equipment | |
| KR100379388B1 (en) | Cooking device by heating | |
| CN109951911A (en) | Rectangle battle array presents type micro-wave heating furnace | |
| CN109548220A (en) | Basic mode battle array presents type micro-wave heating furnace | |
| CN203206506U (en) | Antenna stirrer for microwave oven | |
| JP3745588B2 (en) | High frequency heating device | |
| CN220159977U (en) | Condensation reaction device for producing flame retardant | |
| CN108495397A (en) | A kind of microwave heating equipment | |
| JP3924896B2 (en) | High frequency heating device | |
| CN215010766U (en) | Rectangular microwave reaction cavity structure with controllable metamaterial cavity wall | |
| JPH0945472A (en) | High frequency heating device | |
| CN220069442U (en) | Food cooking device with balanced cooking function | |
| CN109548217A (en) | Transverse field patch antenna array microwave oven | |
| JP2008256320A (en) | Microwave heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |