CN101109523A - Inductive heating cooker - Google Patents
Inductive heating cooker Download PDFInfo
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- CN101109523A CN101109523A CNA2007100847535A CN200710084753A CN101109523A CN 101109523 A CN101109523 A CN 101109523A CN A2007100847535 A CNA2007100847535 A CN A2007100847535A CN 200710084753 A CN200710084753 A CN 200710084753A CN 101109523 A CN101109523 A CN 101109523A
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- 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
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Abstract
The invention provides an induction heating cooking device. Three ovens of induction heating cooking device all use the mode of induction heating, so that the interference tone will not bother the user. The induction heating cooking device comprises: two induction heating coils (13a,13b) arranged at front of a case; an induction heating coil (13c) arranged at inner side between these induction heating coils; a plate (3) which covers the upper surface of these coils and carries a cooking pot; and an inverter (72) which supplies electric power to these induction heating coils, and controls the output power by changing the operable current frequency, characterized in that: the highly lowest frequency of the frequency band used for the induction heating coil (13c) arranged at the inner side rather than the maximum frequency of a frequency band used for the induction heating coils (13a,13b) arranged at front of the said case is set up.
Description
Technical field
The present invention relates to induction heating cooking instrument.
Background technology
All the time, the heating device of the pot of using as cooking has occupied great majority with the flame of gas range etc. as the heating device of thermal source.
In recent years, dwelling house is remarkable day by day with the trend of the so-called complete electrified dwelling house of equipment all-electric.As wherein one encircling, the eddy current of heating device utilization pot makes the electromagnetic induction heating cooker of the heat release of pot own cause attention again.At present, in general as induction heating cooking instrument, in the presence of about two kitchen ranges of configuration be induction heating type, the kitchen range that is disposed at the inboard between these kitchen ranges and the kitchen range is the heating device that has utilized the heater-type of pharoid etc.
Yet, be arranged near the kitchen range of heater-type the central authorities of this back body, owing to be the cause of heater-type, belong to type by the heat conduction heating kettle.This is to shelve the plate of pot and should heat conduct structure to pot by heater heating.Therefore, produce the shortcoming that plate becomes high temperature.This is just opposite with the advantage of kitchen range and peripheral athermic induction heating mode thereof.
So, wish that it all is the cooking device of induction heating mode that the kitchen range that makes three places is arranged.Recording on patent documentation 1 (patent documentation 1: the spy opens the 2004-319350 communique) and making the kitchen range that is arranged at main body central authorities inboard is induction heating type also, makes whole kitchen ranges be the heating device of induction heating type.
Yet, such as patent documentation 2 (patent documentation 2: specially permit communique No. 2532565) record, the firepower of this induction heating type (power output) makes the frequency change that is flowing in the electric current on load coil and the resonating capacitor regulate (frequency control system) by the switch element that control constitutes frequency converter.But such as this patent documentation 2 record, if make cooking device, then have the problem that interference tones (beat tone, buzzing) takes place with a plurality of load coils.If make the action of a plurality of load coils pot is carried out cooking, then under the situation with different firepower heating kettles, each pot is subjected to the alternating magnetic field of different frequencies and vibrates from each load coil.Though because the frequency ratio audio frequency of this vibration is also high and unquestionable, in case the difference of a plurality of pots vibration frequency drops in the voiced band, then uncomfortable interference tones is made us in generation.
In order to address this problem, on this patent documentation 2,,, eliminate interference tones so that the difference of vibration frequency disappears by carrying out firepower control (load control mode) not change the mode that frequency changes the load of energising.
Also have, on this patent documentation 3 (patent documentation 3: the spy opens clear 58-142783 communique), in order to solve the problem of above-mentioned interference tones, the frequency (feeding frequency poor of the electric current of two load coils) that records selected interference tones with the method (on patent documentation 4 (patent documentation 4: the spy opens flat 2-288184 communique), also recording same technology) in the frequency band that is located at the fan motor sound in the cooling induction heating cooking instrument or selected frequency so that the also big method of frequency ratio voiced band of interference tones.Have again, recording on the patent documentation 4, reduce the method for interference tones by keeping given above distance for the distance between two load coils and the relation of interference tones.
The reduction interference tones technology that above-mentioned patent documentation 2 to patent documentation 4 is put down in writing realizes by the fixing frequency that feeds the electric current of load coil.That is, realize firepower control by the load control of being carried out in the mode of fixed current frequency, control load.Yet, on this load control mode, exist its circuit to constitute and compare various problem with frequency control system, therefore, preferably adopt frequency control system.
But, then there is the problem that produces interference tones if making the kitchen range at three places that put down in writing as patent documentation 1 all is induction heating mode.As mentioned above because frequency control system can change by the firepower that changes frequency load coil is produced, therefore, such as patent documentation 2 to patent documentation 4 can not to make interfering frequency the record be fixed value.Therefore, all be induction heating mode as three kitchen ranges that make the induction heating cooking instrument that is assemblied in the combined kitchen equipment, if make firepower be controlled to be frequency control system, then must produce interference tones.
Summary of the invention
When the object of the present invention is to provide a kind of three on kitchen range all to adopt induction heating mode, make interference tones (beat tone) can not cause the induction heating cooking instrument of user's worry at induction heating cooking instrument.
Above-mentioned purpose realizes that by the induction heating cooking instrument of following proposal it possesses: two load coils that lean on the former configuration of framework; A load coil by the configuration of the inboard between these load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that, more set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration in the highland than the peak frequency that is used at the frequency band on the load coil of the former configuration of leaning on described framework.
Above-mentioned purpose realizes that by the induction heating cooking instrument of following proposal it possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that, more set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration in the highland than the peak frequency that is used at the frequency band on the load coil of the former configuration of leaning on described framework.
Above-mentioned purpose realizes that by the induction heating cooking instrument of following proposal it possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that, set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration more than the 15kHz than being used for exceeding at peak frequency by the frequency band on the load coil of the former configuration of described framework.
Above-mentioned purpose realizes that by the induction heating cooking instrument of following proposal it possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration more than the 15kHz than being used for also exceeding at peak frequency by the frequency band on the load coil of the former configuration of described framework, and make by the linear diameter of the load coil of described inboard configuration than also thin at linear diameter by two load coils of the former configuration of described framework, and make by the radical of the load coil of described inboard configuration more than the radical of two load coils of the former configuration of leaning on described framework.
According to the present invention, when three kitchen ranges that can be provided at induction heating cooking instrument all adopted induction heating mode, interference tones can not cause the induction heating cooking instrument of user's worry.
Description of drawings
Fig. 1 is the stereogram with the state of induction heating cooking instrument folding and unfolding in combined kitchen equipment of built in type.
Fig. 2 is the top key diagram of expression heating device.
Fig. 3 is the key diagram that expression is different from the embodiment of Fig. 2.
Fig. 4 is the key diagram of the front of expression heating device.
Fig. 5 is the key diagram of the state of expression when disassembling visible heater coil behind the top plate of heating device.
Fig. 6 is the cutaway view of the internal structure of expression when observing from the side of heating device.
Fig. 7 is the key diagram of the structure of expression electric oven.
Fig. 8 is the key diagram of electric oven operating portion that expression is positioned at the kangaroo bag portion of heating device.
Fig. 9 is the key diagram of the top-operation portion of expression heating device.
Figure 10 is the heating part of explanation heating device and the block diagram of control thereof.
Figure 11 is that the total of the consumed power when being used to control the heating device cooking is at maximum consumption power the following description figure.
Figure 12 is the key diagram of the physical circuit of explanation frequency converter.
Figure 13 is the figure of the size of expression top board.
Figure 14 is the figure of the relation between explanation coil-span and the beat tone.
Figure 15 is the figure of the relation between explanation driving frequency and the firepower (power output).
In the accompanying drawing,
1-combined kitchen equipment, the 2-main body, the 3-plate, the 4-electric oven, the 5-operation board, the 6-rest portion, 9-top-operation portion, display part above the 10-, 12-electric oven operating portion, the 13-heater coil, 17-central authorities frequency converter substrate, 18-left and right sides frequency converter substrate, the 20-blowing fan, 65-electric oven display part, the 72-frequency converter, 73-Frequency Converter Control mechanism, the 74-controlling organization, the 75-operation display part, the 81-heater, 82-heater controlling organization, 97-shows, the suction of 98-line sucks heat insulation discharge Piza low baking temperature
The specific embodiment
Below according to the description of drawings embodiments of the invention.
Fig. 1 represents an embodiment of induction heating cooking instrument of the present invention to Figure 10.Induction heating cooking instrument shown in Figure 1 is the induction heating cooking instrument that the built in type of the three pot rest portion 6a of place, 6b, 6c is set on plate 3.
In addition, even present embodiment is not to be embedded in the built in type in the cooking apparatus but the heating device of the arrangement type of device on cooking apparatus is also harmless.
The main body 2 of heating device is provided with and assembles by putting into above combined kitchen equipment 1.After being provided with, can be from the following electric oven (grill) 4 and the operating portion dish 5 of the main body 2 of the previous action heating device of combined kitchen equipment 1.
Cooker when cooking (not shown) is shelved on the plate 3 that is made of heat resistant glass etc. that is disposed at above the main body 2.
Not shown cooker can be cooked by being shelved on the rest portion 6 of being drawn on the plate 3.Forward position above the top board 3 in the rest portion 6 on main body 2 disposes right 6a of rest portion and rest portion left side 6b, and the depths (central rear) of this two rest portion 6a and 6b disposes the 6c of rest portion central authorities.And, clip plate 3 and below each rest portion 6, be respectively equipped with the following heater coil unit 25 that is used for heated cooker.
The 6c of rest portion central authorities is cooking person's the unapproachable position of hand on the position.Therefore, under the state of the right 6a of rest portion in face of cooker is shelved on, rest portion left side 6b, if 6c stretches out one's hand to rest portion central authorities, the steam that is produced in gastronomical process because of the cooker that is shelved on the right 6a of rest portion, the rest portion left side 6b then, 6c is difficult to carry out the cooking of movable hand in rest portion central authorities.Therefore, the cooking kind of carrying out at the 6c of rest portion central authorities is suitable for cooking person not too with the also passable cooking of manual operation, mainly is the cooking of boiling stewed or insulation etc.Also have, to stew or be incubated required firepower more weak and maximum consumption power is also limited owing to boil, therefore, the firepower that is arranged on the 13c of heater coil central authorities of the 6c of rest portion central authorities is set for a little less than the right 13a of heater coil that is provided with than the right 6a of corresponding rest portion and rest portion left side 6b and the heater coil left side 13b and is made consumed power very little.
In Fig. 2, " 3IH " is that expression whole heating part (kitchen range), three places is the sign 97 according to load coil.By the substantial middle of plate 3 or link the right 13a of heater coil and the straight line at the center of heater coil left side 13b on the position on sign is set, showed by cooker etc. and also can not hide sign even on rest portion, put to put in store, also have, see that just can easily look the mode of heating of recognizing three places after the sign of the substantial middle portion that is disposed at plate 3 is induction mode.
In Fig. 1 and Fig. 2, be provided with framework 14 for end face around the baffle 3.This framework 14 by be installed on plate 3 in face of last ora terminalis on framework before 14a and be installed on the rear of plate 3 behind the framework on the ora terminalis 14b and be installed on the right side the right 14c of the framework on the ora terminalis and be installed on the left 14d of framework that goes up on the ora terminalis in the left side and constitute.In the present embodiment, though framework is divided into four, make it to constitute one or be divided into two or be divided into arbitrarily several also can, also have, may not necessarily be installed in four limits of plate 3, only be installed in plate 3 in face of or rear or both sides, front and back or the right and left also can.
Being provided with the heat release parts in main body 2 inside is following heater coil unit 25 and electronic device, and is provided with the air entry 7 that is used for sucking from the outside of main body 2 air in order to cool off these parts.This air entry 7 is positioned on the position on the right side of the following exhaust outlet 8 on the 14b behind the framework of main body 2 under the situation of top view.
At 7 inhaled airs of air entry, behind the following heater coil unit 25 and electronic device that have cooled off in main body 2 inner heat releases, outside main body, discharge from exhaust outlet 8.Also have, also discharge the used heat of following electric oven 4 simultaneously from this exhaust outlet 8, this exhaust outlet 8 is arranged at behind the framework above the main body 2 on the 14b, a side of electric oven 4 positions.
Explain electric oven 4 with Fig. 7 below.Cooking storehouse 26 is the box-shaped of front openings, and its inside is provided with last radiator body 27, time radiator body 28 that is made of sheathed heater etc.Top, rear in this cooking storehouse 26 is provided with air exit 29.In addition, though exemplified the embodiment that is provided with radiator body 27 and following radiator body 28, also can only adopt radiator body 27 as radiator body.But in this case, in the process of barbecue gratin 30, be necessary to overturn.
On the door of electric oven 32 of the front openings portion that blocks cooking storehouse 26, in its surperficial side handle 11 is installed, an inboard side is equipped with pallet 31.Pallet 31 can be come in and gone out folding and unfolding freely in cooking storehouse 26 from the front peristome.On the one hand, among pallet 31, shelve the gratin 30 that double-edged fine-toothed comb 33 and putting is put fish etc. thereon.
The air cleaning that is provided with the cigarette that produced or foul smell in the storehouse 26 in the cooking when purifying barbecue gratin 30 is with catalyst 34.Air cleaning is mounted to the cigarette that enters from air exit 29 or foul smell with catalyst 34 must be through air cleaning with catalyst 34.
If make exhaust fan 36 actions, by means of the air suction inlet 42 that is arranged between pallet 31 and the door of electric oven 32, air enters in the cooking storehouse 26.Leaked-in air through air cleaning with the cigarette that is produced in catalyst 34 and exhaust passage 35 and the cooking storehouse 26 or foul smell from exhaust outlet 8 discharges.By the catalyst action of air cleaning with catalyst 34, the corresponding rand of ability of the cigarette that is produced in cooking storehouse 26 or foul smell and catalyst reduces the limit and forcibly discharges from exhaust outlet 8.
Be used to heat the catalyst heater 37 of air cleaning with catalyst 34, be arranged at air cleaning with near the catalyst 34 in cooking storehouse 26, thus, the heating air cleaning is with catalyst 34 and bring into play catalyst action.
The temperature testing organization 38 of the thermistor of the top of front openings portion one side of the temperature in the cooking storehouse 26 by being arranged at cooking storehouse 26 and the bottom, side of pallet 31 etc. detects.
In the occasion that only is provided with the single face barbecue rack of heater, for the temperature that prevents pallet 31 rises and must roast after getting wet on the pallet 31 on top.In the present embodiment, owing to made two-sided barbecue, therefore, can't get wet.So, be provided with cooling duct 39 in the bottom of pallet 31 in order to cool off pallet 31.In case suction fan 40 is rotated, then from air suction inlet 42 leaked-in airs the bottom of pallet 31 flow and cooling pallet 31 after, inboard one side at the back side by cooking storehouse 26 is discharged from exhaust outlet 8.
With Fig. 5 heater coil is described below.The heater coil unit 25 that is used for heated cooker (not shown) is by heater coil 13 and coil substrate 24 and ferrite (not shown) formation.Heater coil unit 25 is arranged to have certain clearance below the plate 3 of each rest portion 6 and between plate 3 and heater coil 13.This gap is to be used to make following cooling air to flow through.Below the right 6a of rest portion, be provided with the right 25a in heater coil unit, below the 6b of a rest portion left side, be provided with a left side, heater coil unit 25b, below the 6c of rest portion central authorities, be provided with the 25c of heater coil unit central authorities.
Litzendraht wire is adopted in the coiling of heater coil 13 in order to suppress skin effect.Apply the voltage of tens kHz, hundreds of V to this heater coil 13 from frequency converter 72 for heated cooker (not shown).
Coil substrate 24 is in following fixedly heater coil 13, is embedded with ferrite (not shown) on 24 at the bottom of the online cycle basis.
The temperature detection of the pot during automatic-cooking etc. is undertaken by the detector units 21 that are embedded in the heater coil 13.The temperature in the bottom of a pan detects indirect temperature by means of plate 3.In addition, in the drawings, though 21 of detector units be arranged on right 25a in heater coil unit and a left side, the heater coil unit 25b, by the insulation that this heater coil of energy management and utilization just carries out also being set on the 25c of heater coil unit central authorities or boiling stewed.
The frequency converter and the cooling thereof of excitation heater coil are described according to Fig. 6 below.Fig. 6 is the longitudinal sectional view of heating device main body 2, and the bottom records the fin of the cooling piece of substrate that frequency converter has been installed and cooling heating element in the central.Dispose the left and right sides frequency converter substrate 18 that has loaded driving heater coil 13a, 13b at its foot.Though the heat of the acceptant hypomere of epimere in general, because its maximum input of the 13c of heater coil central authorities is lower than other coil, therefore, caloric value is less.Therefore, the central frequency converter substrate 17 of the 13c of driving heater coil central authorities is arranged at epimere.Also have, as shown in figure 10, the electronic device that is used to drive right 13a of heater coil and heater coil left side 13b is installed on frequency converter substrate 18, right 72a of following frequency converter and frequency converter left side 72b and the right 73a of Frequency Converter Control mechanism and the left side 73b of Frequency Converter Control mechanism are installed.
Return Fig. 6, be provided with on substrate separately that the heat that is used to make on the electronic device to be produced is carried out heat exchange with cooling air effectively and the fin 22,23 that reduces the temperature of electronic device, fin 23 is made littler than fin 22.
As mentioned above, it is littler than right 13a of heater coil and heater coil left side 13b that the maximum fire of each heater coil is set the 13c of heater coil central authorities for, and therefore, the consumed power on the central frequency converter substrate 17 is also littler than left and right sides frequency converter substrate 18.Therefore, the caloric value of electronic device is still little than left and right sides frequency converter substrate, thereby it is also little to make cooling go up used fin.Therefore, on central frequency converter substrate 17, use less fin 23, on left and right sides frequency converter substrate 18, use bigger fin 22.
The air cooling of each heat release device by transmitting from blowing fan 20.The outer gas of the cooling usefulness that sucks from air entry 7, by being used to hold in the substrate housing 15 of left and right sides frequency converter substrate 18 and central frequency converter substrate 17 and control substrate 19, and after absorbing the heat of fin 22,23, cool off each coil and discharge to the outside from exhaust outlet 8.
The heater coil unit that substrate housing 15 shown in Figure 5 was disposed at and was provided with electric oven 4 is the below of heater coil unit 25 on the contrary.In the present embodiment, downside by being arranged at the right 25a in heater coil unit and on the substrate housing folding and unfolding substrate, so that substrate when avoiding cooking from the radiant heat of heater coil 13 or electric oven 4, also have, on substrate housing 15, be formed with the air channel, so that on the substrate and heater coil unit and top display part that the cooling air builds up with penetrating into staged effectively.
Since circuit all folding and unfolding in aforesaid substrate housing 15, therefore, promptly the do not circulate control circuit of entire system of the part of big electric current, comprehensive heating device and the top that control substrate 19 that the control part of converter circuit has been installed is arranged on substrate housing 15 of the part of heat release terrifically not.
The operation of heater coil 13 is described with Fig. 9 below.The operation of heater coil 13 is undertaken by the top-operation portion 9 that is arranged at than 14a before the also forward framework of plate 3.With put the right 6a of the rest portion of putting pot, the 6c of rest portion central authorities, rest portion left side 6b begins to dispose the right 9a of top-operation portion, the 9c of central authorities of top-operation portion, the left side 9b of top-operation portion accordingly from the right.This is that the operator can lean on intuition to understand the configuration of the relation between pot and the operating portion.
As we know from the figure, the right 9a of top-operation portion, the left side 9b of top-operation portion are that mutually same key is arranged.This is other the also little result of heater coil of function ratio who makes the 13c of operator's heater coil central authorities.
The representative that is operating as with the right 13a of heater coil describes below.The 48th, the disconnection that is used to begin or stop to cook/beginning key, LED lamp 53 is bright in gastronomical process.
The firepower of the cooking is selected by firepower key 49.The firepower key is divided into the key of the quadravalence section of low baking temperature, weak fire, moderate heat, strong fire, and individually is provided with key in the mode that can set necessary firepower with once-through operation.Standard as for each firepower, when for example the firepower that can regulate for 12 stages in maximum was regulated, " 1 " stage was equivalent to 100W, " 2 " stage and is equivalent to 200W, " 3 " stage and is equivalent to 300W, " 4 " stage and is equivalent to 400W, " 5 " stage and is equivalent to 500W, " 6 " stage and is equivalent to 800W, " 7 " stage and is equivalent to 1.1KW, " 8 " stage and is equivalent to 1.4KW, " 9 " stage and is equivalent to 1.6KW, " 10 " stage and is equivalent to 2KW, " 11 " stage and is equivalent to 2.5KW, " 12 " stage and is equivalent to 3KW.The numeral in each stage be on described later on the display part 10 as the standard of firepower and the numeral that shows.Also have, write show to close at firepower and fasten with actual stage, on low baking temperature, distribute " 1 ", on weak fire, distribute " 2 ", " 3 ", " 4 ", " 5 ", on moderate heat, distribute " 6 ", " 7 ", " 8 ", on strong fire, distribute " 9 ", " 10 ", on high-power firepower, distribute " 11 ", " 12 ".Firepower key 49 can directly be set on the representational firepower of firepower of quadravalence section, low baking temperature key 49a can be set on the firepower of " 1 ", weak fiery key 49b can be set on the firepower of " 4 ", moderate heat key 49c can be set on the firepower of " 7 ", strong firepower 49d can be set on the firepower of " 10 ", and the LED lamp 54 of the key part that sets is bright.
The 51st, mainly boiling the timer key of selecting when stewed or insulation etc. are regularly cooked.The 52nd, be used to select the menu of cooking rice, fried food, boiling water etc. of automatic-cooking, by pressing Menu key 52 display menu on the display part 10 on described later, whenever switch by 52 shown menus of a Menu key, thus, select employed menu.
Also have, the setting of the oil temperature the when setting of the amount of the time set the when adjusting of firepower or timing are cooked, the rice when cooking rice, the setting of finishing adjusting of automatic-cooking, fried food can be undertaken by setting key 50.The UP key 50a of the quantity of this setting key 50 when increase setting etc. and the DOWN key 50b that reduces quantity when setting etc. constitute, and LED lamp that setting key is 50 ones 55 represents that setting key 50 is effective when bright, and it is invalid to represent during light-off.
The following describes the situation of for example carrying out the adjusting of firepower with setting key 50.At first press moderate heat key 49c and firepower is set in " 7 ".Then, by the UP key 50a of twice setting key 50, the numeral that then is presented at the firepower on the following top display part 10 is altered to " 8 " from " 7 ", then is altered to " 9 " and is set on " 9 " from " 8 ".Therewith together, the LED lamp 54 of 49 ones on firepower key also puts out with the LED lamp of moderate heat key 9c and the LED lamp of strong firepower 49d is bright.Other setting is also identical therewith, and the operation of for example pressing the later setting key 50 of timer key 51 becomes time set and uses.In addition, because its operation of 9b of a top-operation portion left side, arrangement are identical with the right side 9a of top-operation portion, therefore, omit its explanation.
The following describes the 9c of central authorities of top-operation portion.The main cooking of the 6c of rest portion central authorities is insulation and boils stewed.Its reason as mentioned above.Therefore, the firepower of the 13c of heater coil central authorities is set for also littler than other the firepower of heater coil.Therefore, it is enough to count down to low baking temperature, weak fire, moderate heat as firepower, circulating even setting key 62 is made, also since press three times at most will reposition, therefore, the firepower setting key of corresponding each firepower is not set as front two heater coil 25a, 25b.Thus, can guarantee the space that is provided with of key.In addition, owing to be designed to limit firepower, therefore, the automatic-cooking contents of menus is limited to boils in stewed, the insulation etc.
Referring to Fig. 2 and Fig. 9, be disposed at a plurality of keys in the top-operation portion 9, be arranged into row along the width of main body 2 and be disposed at 14a before the framework.And, under situation about facing, dispose the right 9a of top-operation portion, the 9c of central authorities of top-operation portion, the left side 9b of top-operation portion in order from the right of main body 2.But if only arrange each key along horizontal row, then its boundary is difficult for judging concerning the user.Therefore, be necessary to implement to surround each top-operation portion respectively or surround respectively or with the chromatic zones measure that grades with color with frame.In the present embodiment, when surrounding each top-operation portion respectively, in the above between right 9a of operating portion and the 9c of central authorities of top-operation portion and the spacing more than 1.5 of having vacated the width that is equivalent to minimum key between 9c of central authorities of top-operation portion and the left side 9b of top-operation portion at least with frame line.Thus, have make that the user judges easily visually, the effect in the sense of touch.
The following describes the result's of reflection aforesaid operations demonstration.The content corresponding with the key operation of top-operation portion 9 is presented on the top display part 10.Shown content comprises demonstration of the setting oil temperature that the firepower demonstration, the culinary time showing of timer, the fried food that set in the top-operation portion 9 are used or the like.Should be disposed at a side in front of the top plate 3 that is seated in main body 2 that is the back side one side of plate 3 by top display part 10.Therefore, observe when showing and need observe across plate 3, therefore, observe displaying contents in order to cross plate 3, the display part of display part 10 implements processing in the above.
In the present embodiment, though with each top-operation portion 9 accordingly, be divided into the right 10a of top display part, the 10c of top display part central authorities, top display part left side 10b, and configuration of display part 14a before the framework disposes point-blank above each, but also the top display part 10c of central authorities can be provided with than right 10a of top display part and the more close rest portion 6c of central authorities of top display part left side 10b in order to improve visibility.
Top-operation portion 9 and top display part 10, respectively each rest portion 6 on the plate 3 is provided with, and be configured to if with sight line from rest portion 6 point-blank to front one side shifting, the top-operation portion 9 that then roughly on its straight line, exists corresponding with rest portion 6 and above display part 10, and be configured to top-operation portion 9 than top display part 10 more close cooking person's one sides.
The following describes the operating portion relevant with electric oven 4.As shown in Figure 1, near the right of the electric oven 4 of positive apparent time, dispose the following electric oven operating portion 12 of the heating duration and degree of heating that has disposed operation electric oven 4 and the operation board 5 of electric oven display part 65.Operation board 5 is positioned at the front of main body 2 and constitutes kangaroo formula switching mechanism.The state of having represented shutoff operation dish 5 on Fig. 1, Fig. 2 have represented to open the state of operation board 5.Make under the state that the operator stands when the cooking, can carry out the operation of electric oven operating portion 12 and the affirmation of electric oven display part 65.
According to Fig. 8 various keys are described below.Select barbecue fish and delicious barbecue (various automatic-cooking) by grill choice menus key 66.Whenever click barbecue fish key 66a, then be presented at whole roasting, raw fish fish shellfish dried food and nuts on the electric oven display part 65, water the juice barbecue, manual LED lamp circulation is switched, and select the menu of bright lamp.Therewith in the same manner, by pressing delicious roasting key 66b circularly, pizza, tinfoil barbecue, milk are dried the lighting lamp state that junket irons the LED of dish and are switched, and select the menu of bright lamp.
Behind the choice menus, can set cooking completion (barbecue degree) by setting key 68.Whenever click UP key 68a and DOWN key 68b, by strong bright selection of LED lamp in electric oven display part 65 weak.And, can select the cooking time by pressing timer key 69.Also can select timer time (heating concluding time) by setting key 68 this moment.Various settings finish, and begin the cooking by pressing the disconnection/beginning key 67 that is used to begin, stop, cancelling the selected cooking.In addition, even be set with under the situation of timer, enough stop the cooking by pressing this disconnection/beginning bond energy.
Also have, in relating to the heating device of present embodiment, be provided with and prevent that child does mischief-making function.Can lock by pinning anti-child's locking key 71 continuous three seconds, by pinning release in three seconds once more continuously.
With Figure 10 control is described simply below.Operation display part 75 is made of so far illustrated top-operation portion 9, electric oven operating portion 12, top display part 10 and electric oven display part 65.The operating portion of operation display part 75 transmits as input signal 80 the disconnection information that begins of the menu imported, firepower information, the cooking etc. to controlling organization 74, controlling organization 74 carries out treatment situation such as situation as showing that signal 79 transmits to operation display part 75 with the information discerned, the cooking, and display part 10 and electric oven display part 65 show in the above.
Controlling organization 74 is according to the programme-control heating part of the content of setting in operation display part 75 and the automatic-cooking of assembled in advance etc.According to the content that sets, with the beginning of the cooking, stop, the set information of firepower transmits to following Frequency Converter Control mechanism 73 or heater controlling organization 82 via control signal 78 (control signal 85).And, receive temperature information by receiving the control signal 78 (control signal 85) of having carried temperature information from the detector unit 21 (temperature testing organization 38) that is arranged on the detected temperatures on the heating part.Also have, though not expression in block diagram is also carried out the control of blowing fan 20 and make the blowing fan action in gastronomical process.
Frequency Converter Control mechanism 73 is the consumed powers that monitor and proofread and correct the beginning and stop of setting to the power of heater coil 13, energising, heater coil 13 according to the indication of controlling organization 74.And, by frequency converter 72 output frequency converter detection signals 76 are controlled frequency converters 72 (following).For the consumed power that monitors and proofread and correct heater coil 13, input current and input voltage according to each heater coil 13 that sends by detection signal 77 from following frequency converter 72 calculate consumed power, and control frequency converter 72 by frequency converter detection signal 76 in the mode that firepower reaches setting value.
Frequency converter 72 is the mechanisms that are used for to heater coil 13 supply powers, according to the supply of carrying out the power supply of heater coil 13 from the indication of Frequency Converter Control mechanism 73.Frequency converter 72 similarly is arranged on each heater coil 13 with Frequency Converter Control mechanism 73, is provided with the right 72a of frequency converter, frequency converter left side 72b, the 72c of frequency converter central authorities.And, carry on each detection signal 77 to 73 transmission of Frequency Converter Control mechanism after detecting the input voltage of each heater coil 13 and input current.Heater controlling organization 82 is according to the temperature limit ON/OFF control heater 81 in the cooking storehouse 26 that monitors electric oven 4 from the signal limit of controlling organization 74.The temperature in cooking storehouse 26 is detected by temperature testing organization 38, is input to heater controlling organization 82 by detection signal 83, by controlled the energising to last radiator body 27 and following radiator body 28 by the indication ON/OFF from the control signal 85 of controlling mechanism 74.
In addition, heater 81 is as the general name of the temperature testing organization 38 that comprises the temperature information in the last radiator body 27 that is used to detect electric oven 4, following radiator body 28, the cooking storehouse 26.
One of effect that controlling organization 74 is described according to Figure 11 is the management of consumed power below.
This figure is used for controlling organization 74 to be no more than the general flowchart that the mode of maximum consumption power manages with the total of consumed power.The figure shows out, when when operation display part 75 is sent the indication of firepower change request, whether the total (Ws) of the consumed power when controlling organization 74 is confirmed to send the firepower change request has surpassed the peak power (Wmax) of product, do not surpassing under the situation of peak power, the change that the firepower of indication operation display part 75 shows, Frequency Converter Control mechanism 73 or heater controlling organization 82 sent the cooking begins and the indication of the change of firepower, on the contrary, when not satisfying condition, do not accept the setting of this change.
Because the cooking on the 6b of a rest portion left side is by the manual cooking, therefore, step 95 is that the automatic fire power that the mode of summation (Ws) maximum consumption power (Wmax) below of the consumed power in control firepower change request regulated the firepower of rest portion left side 6b one side changes operation.Like this, when firepower is changed automatically, send the notice sound of informing change to cooking person, make the demonstration that to understand changed content.
This explanation is to have set example to the relative importance value of keeping of the firepower of rest portion left side 6b one side than the lowland.The automatically changes such as combination of the relative importance value of the firepower that each rest portion is required by using.For example, bring into use under the situation of the cooking in the two sides heating of right 6a of rest portion and rest portion left side 6b and with electric oven 4 or the 6c of rest portion central authorities, if carry out automatic-cooking on the 6b of a rest portion left side, then the relative importance value of right 6a one side of rest portion is set for lower.
Also have rest portion central authorities' its relative importance value of 6c and automatic-cooking (being incubated, boiling stewed), manually irrespectively lower.
Present embodiment is made of above-mentioned structure, the following describes its action.
Will do the firepower of bringing into use strong fire with the user, then the situation of boiling stewed dish with moderate heat is that example describes.If putting the firepower key 49c that presses the moderate heat of the right 9a of top-operation portion after putting pot on the right 6a of rest portion, then the key signals of being pressed becomes input signal 80 and is sent on the controlling organization 74.Controlling organization 74 identify that moderate heat key 49c had pressed already and with this content as showing that signal 79 is delivered in the operation display part 75, and to make display part be that the LED lamp 54 of moderate heat key 49c is bright.And the numeral of " 7 " of the firepower of the last expression of the right 10a of display part moderate heat brightens in the above, and backlight color becomes orange, and expression is set at moderate heat.Then, if press disconnection/beginning key 48 of the right 9a of top-operation portion, then make LED lamp 53 bright and begin to heat by identical pipeline (explanation of following omission same signal approach).
If sending the cooking, controlling organization 74 begins indication, be the signal of " 7 " to the firepower that the right 73a transmission of Frequency Converter Control mechanism sets then by the right 78a of control signal, the right 73a of Frequency Converter Control mechanism that receives this signal constitutes the control that the firepower ground that sets carries out the right 72a of frequency converter, and carries out the power control of the right 13a of heater coil.The right 72a of frequency converter carries behind the right 77a of detection signal the detected value of input voltage and input current to the right 73a transmission of Frequency Converter Control mechanism, and in the right 73a of Frequency Converter Control mechanism, obtain consumed power according to detected value, and make the firepower that sets become on " 7 " fixed consumed power ground carry out the power control explanation of omission same signal approach (below) of the right 13a of heater coil.
Also have, controlling organization 74 is in case the beginning of the identification cooking then makes blowing fan 20 be in the ON state.If blowing fan 20 is in the ON state, blowing fan 20 is from the air in air entry 7 suction main bodys 2 outsides, and the air quantity of sending from blowing fan 20 is assigned on the part of each heating, and each part limit is cooled off from outlet 8 discharges in the limit.
From the air that blowing fan 20 is sent, the left and right sides frequency converter substrate 18 in substrate housing 15 that mainly ventilates, central frequency converter substrate 17, the right 25a in heater coil unit, a left side, heater coil unit 25b, the 25c of heater coil unit central authorities.Cool off the air of left and right sides frequency converter substrate 18 and central frequency converter substrate 17 and delivered to control substrate 19 and top display part 10 and top-operation portion 9 and heater coil unit 25, on heater coil unit 25, directly mix from the air of blowing fan 20 with by the air that substrate comes and cool off, these air are all discharged from exhaust outlet 8.Blowing fan 20 can be any one in Sirocco fan, the turbofan.
The following describes the situation that changes to strong fire from moderate heat.If press the strong firepower 49d of the right 9a of top-operation portion, then the LED lamp 54 of strong firepower 49d is bright, and the numeral of " 10 " of the firepower of the strong fire of the right 10a of display part brightens above the expression, and backlight color becomes redness.
Boil under the stewed situation transferring to, still take rest portion right side 6a for a long time, then greatly reduce the efficient of other cooking if boil to stew.So, boil the stewed 6c of rest portion central authorities that fixes on and carry out.Each rest portion is made of and the maintenance level top board 3, and therefore, pot moves easily.
The firepower of pressing disconnection/right 6a of beginning key 48 setting rest portion of the right 9a of top-operation portion before moving is " disconnection ", and confirms light-off and the firepower numerical value of the right 10a of top display part and the light-off backlight of LED lamp 53.If make end of cooking, then blowing fan 20 also stops the action specification of blowing fan (below omit when carrying out identical action).
After confirming that firepower stops, pot is moved to the 6c of rest portion central authorities, this time use the top display part of the setting key 62 limits observation central authorities 10c limit of the 9c of central authorities of top-operation portion that firepower is set on " 7 " of moderate heat.At this moment, backlight become orange.Further press timer key 64, behind setting key 62 setting timers, press disconnection/beginning key 61 and confirm that LED lamps 89 are bright.After alarm lamp is bright, be placed into the fixed time make zero till (pot in food at this moment between before boil always stewed).
The following describes the situation of during the 6c of rest portion central authorities boils the stew meat and fish dishes, cooing rice of automatic-cooking.Shelve pot (will wash in a pan good rice put in the entry soak) on the 6b of a rest portion left side, the demonstration limit of display part left side 10b was with Menu key 60 selections " cooking rice " of top operating portion left side 9b, and with the amount (measuring cup quantity) of setting key 58 setting rice above the limit was observed.Setting finishes, if press disconnection/beginning key 56, then LED lamp 86 is bright and begin to cook rice.Regulate when cooking the rice increase and decrease according to hobby, when LED lamp on being positioned at setting key 58 88 is glittering, regulate with UP key 58a or DOWN key 58b.As for its demonstration, be set on the 10c of display part central authorities in the above and show L when more weak, be set at and show H when strong.In automatic-cooking, the temperature in the pot detects by means of pot and plate 3 with detector unit 21b, and the data that detected, secondly are delivered on the controlling organization 74 by control signal left side 78b via the left side 73b of Frequency Converter Control mechanism from detection signal left side 77b.And, with the temperature of controlling organization 74 control food (pot).Also have, confirm the situation of carrying out of the cooking according to the variation of temperature data.
When cooking when cooking rice and determining remaining time, then the 10c of display part central authorities shows remaining time and was that unit successively decreases with one minute in the above.
The following describes with the right 6a of idle rest portion and further append the situation of cooking.Because cooking rice and boiling stewedly, the total of consumed power becomes 3.6kw.The consumed power that amounts to is (when setting automatic-cooking) decision when setting firepower, and especially in automatic-cooking, the employed maximum consumption power that has been predetermined that carries out of the cooking becomes benchmark.For example, if making the firepower of doing when carrying out in the rice is the employed maximum consumption power of in-process, the high-power 2.5kW of the firepower when then this is burned becomes benchmark.Stew boiling, be set on " 7 " owing to set firepower, therefore, the consumed power of this moment is 1.1kW.Consumed power during more than for setting, it adds up to 3.6kW, if the maximum consumption power of main body 2 is decided to be 5.8kW, can use till the last 2.2kW.
If under this state, on the right 6a of rest portion, be set in " 10 " (consumed power is 2kW) of strong fire and cook, then setting is altered on powerful " 11 " (consumed power is 2.5kW), then the total of consumed power becomes 6.1kW, and the result surpasses maximum consumption power 5.8kW.
So, the firepower " 7 " that controlling organization 74 makes the 6c of rest portion central authorities is automatically to " 6 " (consumed power is 800W) and change setting (utilizing buzzing to inform during change), make the total of consumed power in maximum consumption power, the firepower of right 6a one side of rest portion can be set change in powerful " 11 ".
At this moment, though rest portion left side 6b one side is in the state that can not accept to change at automatic-cooking because of just, but in automatic-cooking, even also have and for example weaken the firepower that boils stewed, insulation etc. a little, also not too influence the situation of dish, also can make the firepower of each menu can change or can not change midway midway.
Also have, under the situation that has changed firepower midway of automatic-cooking,, firepower is returned in the former setting if on maximum consumption power, still have leeway.
Have again, the firepower that requires according to cooking person is provided though also can count carefully maximum consumption power, but by being predetermined the combination of employed rest portion (electric oven portion) and firepower, and the rest portion that can use in advance and spendable firepower be presented on the display part and clear and definite, also can inform the scope of the firepower that can use in advance to cooking person.
The following describes electric oven.After the user put the gratin 30 of fish etc. on the double-edged fine-toothed comb 33 that is placed on electric oven 4, the barbecue fish key 66a of operation electric oven operating portion 12 selected whole roasting.And if press disconnection/beginning key 67, then the LED lamp of disconnection/beginning key 67 is bright, and begins energising on upper and lower radiator body 27,28 and catalyst heater 37.In addition, on the pallet 31 of shelving double-edged fine-toothed comb 33, can not get wet this moment.
Then, motor 41 drives, and coaxial exhaust fan 36 and suction fan 40 are rotated.Its result, the cigarette that produces from the gratin 30 of fish etc. is being taken off cigarette, deodorization by air cleaning with the process of catalyst 34 from the air exit 29 on the top, rear that is arranged at cooking storehouse 26, and the exhaust outlet 8 by the left side of 14b behind the framework of exhaust passage 35 from being positioned at main body 2 above is to outside (indoor) discharge.
On the other hand, driving by described motor 41, suction fan 40 is also rotated, air suction inlet 42 air in the suction chamber in cooling duct 39 of front lower from cooking storehouse 26, and cooling pallet 31 during in the cooling duct 39 that makes it to circulate, then, arrive exhaust outlet 8 and discharge by air outlet 47.
Also have, at this moment, the self cooling fan 43 that is arranged on the axle of the other end of motor 41 also rotates together, from the bottom surface that is arranged at main body 2 one sides and the air inflow aperture on the side 45 to heat-insulating room 44 in suction air and cool motors 41 backs from tap 46 discharges.
At this moment, the air that is aspirated from air inflow aperture 45 by self cooling fan 43, isolated from the heat of cooking storehouse 26 1 sides by heat-insulating room 44, be suppressed to promptly about 60～70 ℃ lower than motor 41 from exothermic temperature, it is overheated to suppress motor 41.
Owing near the air exit 29 of the exhaust passage 35 of the exhaust outlet 8 that connects cooking storehouse 26 and main body 2, be provided with air cleaning with catalyst 34, also have, formed cooling duct 39 in the bottom of pallet 31, the air suction inlet 42 of this cooling duct 39 is arranged on front one side in cooking storehouse 26, and air outlet 47 is linked to each other with above-mentioned exhaust outlet 8, have again, exhaust fan 36 and suction fan 40 on exhaust passage 35 and cooling duct 39, have been disposed respectively, and these exhaust fans 36 and suction fan 40 are attached on the coaxial motor 41, therefore, make pallet 31 be cooled off fully by the outer gas of circulation in the cooling duct 39 of bottom, even on pallet 31, do not get wet, also can prevent oil be fuming or on fire, and can simplify the operation in when use.
Have, can give full play to according to deodorization function and to main body 2 outside the exhaust of air cleaning with catalyst 34, its result prevents that cigarette from especially spilling outside main body 2 from 32 ones of the door of electric oven of front from the gap in cooking storehouse 26, can use kitchen tools neatly.
For example carry out the rice of doing of automatic-cooking at rest portion left side 6b, rest portion of cooking and firepower when then having used electric oven, consumed power is 1.5kW on electric oven, is 2.5kW doing on the rice, amounts to 4kW.Because electric oven and automatic-cooking can not change firepower, therefore, the maximum fire that can use on the right 6a of the rest portion that can use remaining 1.8kW is " 9 " of strong fire.
Also have, be included in the right 6a of rest portion 6c of central authorities and rest portion and be incubated and boil to stew etc. and can use everywhere altogether.Perhaps, also can make the 6c of electric oven 4 and rest portion central authorities use three places at most as selection.
The control of the heater coil 13 that had illustrated above explaining below.Figure 12 is the concrete circuit diagram of heater coil 13 shown in Figure 10, frequency converter 72, Frequency Converter Control mechanism 73.Because three heater coils 13 are mutually the same, therefore, one of them only is shown describes.
Describe about frequency converter 72.With rectifier 102 AC power 117 is transformed to direct current, and is connected on the switch portion that the concatermer by switch element 103,105 constitutes.Be connected with to inverse parallel diode 104,106 respectively at switch element 103,105, and between the datum mark of the tie point of switch element 103,105 and DC voltage, connect the resonant circuit portion that constitutes by heater coil 13 and resonating capacitor 107.Also have, on switch element 103,105, be connected with vibration damping capacitor 108,109 respectively.
By with high frequency mutual exclusion ground difference on-off switch element 103,105, to the resonant circuit portion supply high frequency resonance current that constitutes by heater coil 101 and resonating capacitor 107, and near the load of heater configuration heater coil 101.
Input current mapping device 112 makes detection be transformed to after the suitable grade to control part 110 outputs from the output signal of the testing agency 111 of the electric current of AC power 117 input.
Input voltage testing agency 113 detects the voltage of AC powers 117 and output signal is transformed to after the suitable grade to control part 110 outputs.
Inverter current testing agency 115 exports to control part 110 after making the output signal that detects the testing agency 114 that is flowing in the electric current in the resonant circuit portion be transformed to suitable grade.
Figure 15 is the figure of the driving frequency and the relation between the transducer power of load input of expression frequency converter 72, adopts by making changeable frequency regulate the variable frequency output control mode of transducer power.The load of frequency converter 72 is the equivalent inductance that is made of heater coil 101 and pot and the combination of equivalent resistance and resonating capacitor 107, when with resonant frequency f
0When feeding electric current, can import peak power Wpeak.If with than lid frequency also high frequency drives switch element 103,105, then the power of being imported descends gradually.In fact, because equivalent inductance and equivalent resistance change with the material of load, therefore, will be than resonant frequency f
0High frequency f
1Limit as variable frequency is set, and sets at that point and can import rated power Wmax to given load.
Also have, if driving frequency is set highly more, though then transducer power reduces more, but the breaking current of switch element 103,105 is low more, therefore, the loss of switch element 103,105 also increases more, and its heat release of switch element 103,105 and vibration damping capacitor 108,109 as a result also becomes big.Therefore, in higher frequency one side, also with given frequency when given lowest power Wmin (or frequency) as limit f
2Its result, the relation of actual frequency converter 72 constitutes f
0＜f
1＜f
2(f
0=18kHz, f
1=20kHz, f
2=40kHz).
In addition, though f
2On transducer power become the lowest power that frequency converter 72 can continuous control power, in the time of on will be than it also little power input load, adopted and used the method for break-make control of the energising of frequency converter 72.Which kitchen range no matter also have, be, all can heat heated object---pot is the magnetic pot as iron, stainless steel, and can not heat the nonmagnetic material pot as aluminium, copper.
Like this, frequency converter 72a, 72b are at driving frequency scope f
1～f
2(the power that the inner control of 20kHz～40kHz) is supplied with to heater coil 13a, 13b.
Also have, according to following reason, frequency converter 72c, driving frequency scope f
1～f
2Select (60kHz～90kHz), and at this frequency range inner control heater coil 13c.
Yet main body 2 is that insert its top from the peristome that the cabinet that is arranged at combined kitchen equipment 1 pushes up (top board).And, be arranged to the top board of combined kitchen equipment 1 and the top of main body 2 and constitute roughly same position one side.Like this, the appearance and size of main body 2 is limited by the specification of combined kitchen equipment 1.Therefore, as shown in figure 13, the top board 3 with edge portion of heat resistant glass plate and its metallic article on every side of covering is the horizontal rectangular glass face that is made of the size about the wide about 60cm of horizontal stroke, the about 40cm of depth.The top peristome of this top board 3 main body covered 2 also is fixed on the main body 2.In addition, though this top board 3 because of and combined kitchen equipment 1 between concern that its depth is constant, the top board of the horizontal roomy 75cm of being about is also arranged.
In this size, if make three places be load coil, beat tone (interference tones) problem takes place then.If a plurality of load coils action heating kettles are cooked, then with different firepower heating kettle the time, each pot is subjected to alternating magnetic field and vibrates from separately heater coil.Though,, then produce unhappy beat tone if the difference of a plurality of pots vibration frequency drops in the voiced band because of the frequency ratio voice frequency of this vibration is also high thereby unquestionable.
As shown in figure 13, specification by combined kitchen equipment, the hub of a spool spacing of load coil 13a, 13b (bottom of the right 6a of rest portion disposes the right 13a of load coil, and the bottom of rest portion left side 6b disposes load coil left side 13b) is approximately 30cm.Also have, the central 13c of load coil (bottom of the central 6c of rest portion disposes the 13c of load coil central authorities) reaches with the right 13a of load coil and the hub of a spool spacing of load coil left side 13b is approximately 20cm.
Figure 14 shows distance between the induction coil and the relation between the beat tone.Because to (the distance between the center of load coil 13a and load coil 13b of the distance between the induction coil about the front portion, in the present embodiment, be approximately 30cm) the sound pressure level of beat tone lower than the fan motor of blowing fan 20, therefore, sound pressure level is not for to constitute the rank that arouses attention to the user.In other words, making the center distance of load coil 13a and load coil 13b is the sound pressure level distance lower than the sound pressure level of blowing fan 20 of beat tone.
On the one hand, the relation according to load coil 13c must be configured in the depth part of central authorities between load coil 13a and the load coil 13b, main body 2 can not make the center distance between load coil 13c and other coil narrow.Therefore, make that the beat tone that is produced on the distance (distance between the distance between load coil 13c and the load coil 13a, load coil 13c and the load coil 13b) between anterior induction coil and the rear portion induction coil is also higher than the sound pressure level that blowing fan 20 is produced.By the way, the sound pressure level of this blowing fan 20 is lower value 38dB at present.
In order to address this problem, in the present embodiment, the lowest frequency calibration of the power of supplying with to load coil 13c becomes also higher than the peak frequency of the power of supplying with to load coil 13a, 13b.
Specifically, to load coil 13c supply with than supply with to load coil 13a, 13b rise vibration frequency promptly roughly the high frequency power from 20kHz to 40kHz also high play the i.e. high frequency power from 60kHz to 90kHz roughly of vibration frequency.
Like this, be that higher than voice frequency a little high frequency is 20kHz owing to make the minimum of a value of the difference of frequency, thereby sound pressure level can not cause user's worry.In general, voice frequency is 20kHz～15kHz.Almost do not hear more than being called as hyperacoustic 20kHz.For from 15kHz to 20kHz, vary with each individual, audible people is arranged, inaudible people is also arranged.In the present embodiment, be more than the nearly all inaudible 20kHz of people though make the minimum of a value of the difference of frequency for reliability, can not arouse attention to a greater part of people even make the above beat tone of 15kHz yet.
In addition, in the present embodiment, though make load coil 13a, 13b rise vibration frequency for the frequency band roughly the same with it promptly from 20kHz to 40kHz, even depart from because of the relation of above-mentioned distance, beat tone can not become problem yet.But be necessary to guarantee the low-limit frequency of load coil 13c.
Yet, do not cause user's worry in order to make beat tone, make the frequency of load coil 13a, 13b be higher than load coil 13c and go up used frequency and also can achieve the goal.The following describes this reason.Load coil 13a, 13b are configured in main body 2 coil in front, and load coil 13c is the coil that is configured in the depth part.As mentioned above, consider that the maximum fire of the coil in face of being disposed at is set higherly from angle easy to use.In order to improve frequency, must reduce the inductance of coil.In order to reduce the number of turn that inductance is necessary to reduce coil.Because square being directly proportional of the product of the output of coil and the number of turn and electric current if do not strengthen and reduced the suitable electric current of part of the number of turn, then can not get power demand.The reactance of coil is directly proportional with frequency, loss with reactance and electric current square product representation.From above-mentioned reason, if will improve the frequency of the bigger coil of output, then loss becomes big, therefore, and for the input that is controlled at qualification is necessary to reduce loss with interior.For this reason, in the present embodiment, set the frequency of load coil 13c that less coil promptly is disposed at the depth part of main body 2 for, implement the beat tone countermeasure by improving maximum output.
But wish further to reduce this loss and as far as possible effectively utilization input.For this reason, the bare wire diameter of load coil 13a, 13b has made 0.4mm, and winding is made the roughly discoid coil that diameter is approximately 20cm by the winding wire that 18 these electric wire coil bucklings form.On the one hand, the bare wire diameter of load coil 13c has made 0.2mm, and twines the winding wire that formed by 90 these electric wire coil bucklings and made the roughly discoid coil that diameter is approximately 20cm or the minor diameter below it.Can increase the surface area of the winding wire of load coil 13c thus, therefore, can reduce the epidermis impedance of following frequency to increase and increasing, can suppress loss is that coil temperature rises.In addition, winding wire is as long as bare wire diameter is below the 0.2mm and coil buckling forms more than 90.
Claims (4)
1. an induction heating cooking instrument possesses: two load coils that lean on the former configuration of framework; A load coil by the configuration of the inboard between these load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that:
More set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration in the highland than the peak frequency that is used at the frequency band on the load coil of the former configuration of leaning on described framework.
2. an induction heating cooking instrument possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that:
More set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration in the highland than the peak frequency that is used at the frequency band on the load coil of the former configuration of leaning on described framework.
3. an induction heating cooking instrument possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that:
Set the low-limit frequency that is used for by the frequency band on the load coil of described inboard configuration more than the 15kHz than being used for exceeding at peak frequency by the frequency band on the load coil of the former configuration of described framework.
4. an induction heating cooking instrument possesses: two load coils that lean on the former configuration of framework; Set a load coil also lower for by the configuration of the inboard between these load coils and its peak power output than these two load coils; Cover the top of these coils and shelve the plate of cooker; And to the frequency converter of these load coils power supply, and the changeable frequency of the electric current of connecting by making carries out the power output control of these load coils, it is characterized in that:
Exceed the low-limit frequency of having set the frequency band on the load coil that is used for disposing more than the 15kHz than the peak frequency that is used at the frequency band on the load coil of the former configuration of leaning on described framework in described inboard, and make by the linear diameter of the load coil of described inboard configuration than also thin at linear diameter by two load coils of the former configuration of described framework, and make more than radical at two load coils of the former configuration of leaning on described framework by the radical of the load coil of described inboard configuration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006195411A JP2008027601A (en) | 2006-07-18 | 2006-07-18 | Induction heating cooker |
| JP2006195411 | 2006-07-18 |
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| Publication Number | Publication Date |
|---|---|
| CN101109523A true CN101109523A (en) | 2008-01-23 |
| CN100559907C CN100559907C (en) | 2009-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100847535A Expired - Fee Related CN100559907C (en) | 2006-07-18 | 2007-02-28 | Induction heating cooking instrument |
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| JP (1) | JP2008027601A (en) |
| CN (1) | CN100559907C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651922A (en) * | 2011-02-28 | 2012-08-29 | 株式会社东芝 | Heating cooker |
| CN106247416A (en) * | 2016-08-10 | 2016-12-21 | 深圳拓邦股份有限公司 | Many kitchen ranges electromagnetic oven and Poewr control method thereof |
| CN113316685A (en) * | 2018-12-20 | 2021-08-27 | 维斯塔斯风力系统集团公司 | Improvements relating to wind turbine blade anti-icing systems |
| CN114698172A (en) * | 2020-12-29 | 2022-07-01 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57179296U (en) * | 1981-05-08 | 1982-11-13 | ||
| JPS5925193A (en) * | 1982-08-03 | 1984-02-09 | 株式会社東芝 | Induction heater |
| JPS5986188A (en) * | 1982-11-08 | 1984-05-18 | 松下電器産業株式会社 | Heating coil |
| JPH07274527A (en) * | 1994-03-30 | 1995-10-20 | Sanyo Electric Co Ltd | Induction heating cooker |
| JP4096712B2 (en) * | 2002-11-20 | 2008-06-04 | 松下電器産業株式会社 | Induction heating coil and induction heating apparatus using the same |
| JP2004186002A (en) * | 2002-12-04 | 2004-07-02 | Mitsubishi Electric Corp | Electromagnetic induction cooker |
| JP4333200B2 (en) * | 2003-04-18 | 2009-09-16 | パナソニック株式会社 | Cooker |
| JP4887085B2 (en) * | 2006-07-12 | 2012-02-29 | 日立アプライアンス株式会社 | Induction heating cooker |
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2006
- 2006-07-18 JP JP2006195411A patent/JP2008027601A/en active Pending
-
2007
- 2007-02-28 CN CNB2007100847535A patent/CN100559907C/en not_active Expired - Fee Related
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| CN102651922B (en) * | 2011-02-28 | 2014-11-05 | 株式会社东芝 | Heating cooker |
| CN106247416A (en) * | 2016-08-10 | 2016-12-21 | 深圳拓邦股份有限公司 | Many kitchen ranges electromagnetic oven and Poewr control method thereof |
| CN106247416B (en) * | 2016-08-10 | 2018-10-23 | 深圳拓邦股份有限公司 | More kitchen range electromagnetic ovens and its Poewr control method |
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| US20220049683A1 (en) * | 2018-12-20 | 2022-02-17 | Vestas Wind Systems A/S | Improvements relating to wind turbine blade anti-ice systems |
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| CN114698172A (en) * | 2020-12-29 | 2022-07-01 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
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| CN114698171B (en) * | 2020-12-29 | 2023-01-24 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
| CN114698172B (en) * | 2020-12-29 | 2023-01-24 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100559907C (en) | 2009-11-11 |
| JP2008027601A (en) | 2008-02-07 |
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Address after: Tokyo, Japan, Japan Patentee after: Hitachi Global Living Program Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Household Electric Appliance Co. |
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Granted publication date: 20091111 Termination date: 20210228 |