CN1255602A

CN1255602A - Microwave oven

Info

Publication number: CN1255602A
Application number: CN99119702A
Authority: CN
Inventors: 小林省三
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1998-11-27
Filing date: 1999-09-27
Publication date: 2000-06-07
Anticipated expiration: 2019-09-27
Also published as: CN1131963C; KR100346977B1; TW409174B; KR20000034864A; JP2000164335A

Abstract

The subject of the present invention is to provide a kind of microwave oven equipped with a function of heating the foods evenly and effectively without being influenced by both the shape and the loading position the foods. For resolving the above mentioned problem thereof, the solving means are as follows: allowing the controlling device to control inverter circuit by a fixed action rate, and at the same time, detecting both the maximum and minimum electric currents Imax and Imin, while the spinning net is spinning at 360 DEG. Wherein both the maximum and minimum electric currents Imax and Imin are one-time import electric current from a high voltage transformer; at the time while the controlling device detecting the maximum and minimum. Electric currents Imax and Imin, the revolving net will be forced to stop either at the position which generated the maximum Imax or generated the minimum electric current Imin respectively, to keep the microwave irradiating in the cooking chamber accordingly.

Description

Micro-wave oven

The present invention relates to a kind of micro-wave oven, this micro-wave oven has the swivel plate of supporting food.

Existing micro-wave oven is the difference that is caused cooking room internal electric field power (size of heat energy) by the standing wave of microwave.Therefore, when the smaller food (1 glass in rice, a spot of dish etc.) of heating, the efficiency of heating surface is low, and it is inhomogeneous then to produce heating when launching very big food (a plurality of steamed dumplings, pizza etc.) aspect flat heated.Therefore, on swivel plate, place food, while the swivel plate rotation is heated food by means of cooking dishes.

During above-mentioned formation, can be suppressed at the heating inequality of circumferencial direction.But, when especially on the sidewall of cooking room, the exciting mouth being arranged, can make a little less than the heating of the middle body of rotating disc, and stronger etc. in the heating of periphery, can not be to the inhomogeneous effective inhibition of the heating of radial direction.In addition, the heating of the above-below direction when " hot wine " is inhomogeneous to be can not get improving, and can not get the sufficient efficiency of heating surface when perhaps little food being placed on the middle body of rotating disc.

For this reason, the formation of (1) and (2) below having considered to adopt, but some shortcoming is all arranged, all do not form effective measures.

(1), the movable device of impedance adjustment usefulness is set in waveguide, open-circuit impedance is adjusted to the maximal efficiency condition of magnetron according to the state in the cooking room.During this formation, the conductor that the impedance adjustment that is provided with in the waveguide is used becomes the reason that electric spark (スパ-Network) takes place, if suppress the generation of electric spark, the adjustment effect of impedance is diminished.

(2), movable exciting mouth is installed, in the bottom of cooking room make movable exciting mouth move to food under.During this formation, because the driving mechanism complexity of movable exciting mouth so it is very difficult that movable exciting mouth is set, lacks practicality.

(3), when making the rotating disc rotation, it is moved at above-below direction.During this formation,, therefore constitute very complicated because the driving mechanism that rotating disc is moved up and down must be arranged.

The present patent application is artificial solves this problem, and the swivel plate that has proposed conductive material is made in " special be willing to flat 9-298437 number " stops in the angle that is adapted to food, in the halted state of swivel plate to the food irradiating microwaves of fixing a point.This invention is conceived to the stop angle according to swivel plate, produces the Electric Field Distribution of feature in cooking room, can address the above problem.But can not solve the difference of the Electric Field Distribution that enchancement factor caused such as the shape of placement location difference because of food, food containers and size, make it aspect food heating uniformly and effectively, to also have the leeway of improving.

The present invention is in view of above-mentioned situation, and its purpose is to provide a kind of micro-wave oven, and this micro-wave oven is stochastic factor such as the shape of difference, the food containers of unable to take food product placement location and size as far as possible, just can be to evenly heating effectively of food.

In order to achieve the above object, the present invention takes following technical scheme:

A kind of micro-wave oven is characterized in that having:

The high-tension transformer that AC power is boosted;

According to the power supply that above-mentioned high-tension transformer provided, to the heater of cooking room internal radiation microwave;

Be installed in the above-mentioned cooking room, be used to support the swivel plate by the conductive material making of food;

Drive the motor of above-mentioned swivel plate rotation;

To the elementary of above-mentioned high-tension transformer or current sensing means that secondary current detects; And

Drive said motor by control, at the control device of above-mentioned swivel plate halted state to above-mentioned cooking room internal radiation microwave;

Above-mentioned control device makes above-mentioned swivel plate rotation, detects the output signal of above-mentioned current sensing means, according to the testing result of output signal, sets the stop position of above-mentioned swivel plate.

The micro-wave oven of being put down in writing is characterized in that:

Swivel plate becomes uneven shape on direction of rotation.

The micro-wave oven of being put down in writing is characterized in that:

On the middle body of swivel plate, the length that is provided with the length of longitudinal direction and transverse direction is the peristome more than " 1/4 " of microwave wavelength all.

The micro-wave oven of being put down in writing is characterized in that:

On the position when the testing result of current sensing means is maximum, control device stops swivel plate.

The micro-wave oven of being put down in writing is characterized in that:

Control device is set the stop position of swivel plate according to the testing result that begins from the driving of heater through the current sensing means after the stipulated time.

The micro-wave oven of being put down in writing is characterized in that:

Have the converter circuit to the high-tension transformer supply power, control device than the testing result that remains on the current sensing means under certain state, is set the stop position of swivel plate according to the on/off that makes above-mentioned converter circuit.

The micro-wave oven of being put down in writing is characterized in that:

Control device makes swivel plate stop at desired location according to the elapsed time since fiducial time.

The micro-wave oven of being put down in writing is characterized in that:

Control device makes swivel plate rotate once again from halted state, detects the output signal of current sensing means, according to the testing result of output signal, sets the stop position of swivel plate once more.

The micro-wave oven of being put down in writing is characterized in that:

Have the converter circuit to the high-tension transformer supply power, control device is controlled above-mentioned converter circuit according to the output signal of current sensing means.

The micro-wave oven of being put down in writing is characterized in that:

Control device is set the stop position of swivel plate according to the testing result of current sensing means and the content of operation of automatic-cooking key.

The micro-wave oven of being put down in writing is characterized in that:

Has the display unit that shows cooking information, the detected swivel plate stop position of display control unit on display unit.

The micro-wave oven of being put down in writing is characterized in that:

Have shape detecting apparatus, be used to detect the shape that is placed on the food containers on the swivel plate.

Control device is set the stop position of swivel plate according to the testing result of current sensing means and the testing result of shape detecting apparatus.

The micro-wave oven that the present invention put down in writing is characterised in that:

Have

The high-tension transformer that AC power is boosted;

Drive the motor of above-mentioned swivel plate rotation;

According to said apparatus, when swivel plate during, produce disorderlyly in the standing wave in the cooking room in the state rotation of placing food, the impedance in the cooking room changes.And on the oscillatory regime of heater, causing variation, the current value of the primary and secondary of high-tension transformer produces change.Like this, owing to the stop position of swivel plate is set according to current value, so can be on the stop position of factors such as the difference of considering the food containers placement location and shape to evenly and effectively heating of food.

Swivel plate becomes uneven shape on direction of rotation.

According to said apparatus, the Electric Field Distribution in the cooking room because of the stop position of swivel plate is different can great changes have taken place, form abundant heating mode, so obtain being adapted to the best stop position of food containers shape etc. easily.

According to said apparatus, no matter the stop position of swivel plate how, microwave all is easy to pass the opening portion of central authorities.For this reason, the microwave that the base plate by cooking room reflects upward passes the opening portion of central authorities, shines the food of central authorities, so food can more effectively be heated.

On the position, control device stops swivel plate when the testing result of current sensing means is maximum.

According to said apparatus, owing to the efficient of the food on the swivel plate with maximum is heated, so the cooking time can shorten.

According to said apparatus, can detect current value in the oscillation action stable status of heater.For this reason, can truly be reflected in current value corresponding to the change of the Electric Field Distribution of the anglec of rotation of swivel plate, so Electric Field Distribution can correctly be detected with current value.

Have the converter circuit to the high-tension transformer supply power, control device is set the stop position of swivel plate according to the testing result of the on/off that makes above-mentioned converter circuit than the current sensing means under the certain state of maintenance.

According to said apparatus, can under to the certain state of the condition of power supply maintenance of heater, detect current value.For this reason, can be reflected in current value truly, correctly be detected so Electric Field Distribution can be used as current value corresponding to the change of the Electric Field Distribution of the swivel plate anglec of rotation.

According to said apparatus, can make swivel plate stop at desired location by the clocking capability of control device.For this reason, do not need to use swivel plate is stopped at sensor special on the desired location, institute so that constitute oversimplifies.

According to said apparatus, when the Electric Field Distribution in the cooking room changes along with the process of time, and when in the setting of stop position last time error being arranged, the stop position of swivel plate is corrected, so food can more evenly be heated effectively.

Have converter (the イ Application バ-) circuit to the high-tension transformer supply power, control device is controlled above-mentioned converter circuit according to the output signal of current sensing means.

According to said apparatus, but the current sensing means dual-purpose that uses in the control of the current sensing means of detection Electric Field Distribution change and converter circuit.Therefore, need not current sensing means be set separately, make to constitute and oversimplify.

According to said apparatus, for example when carrying out " heating ", stop at the position that lowest high-current value takes place by making swivel plate, can heat with peak efficiency food; And when carrying out " green vegetables ", stop at the position that minimum current value takes place by making swivel plate, can heat with minimum efficiency food.Therefore, can obtain being suitable for the mode of heating of food, food more effectively is heated.

Have the display unit that shows cooking information, control device shows the situation that detects the swivel plate stop position on above-mentioned display unit.

According to said apparatus, just can rotate swivel plate, detect the swivel plate stop position and be notified to the user, therefore can prevent inharmonious sensation because of making swivel plate rotate and stop to cause repeatedly to the user.

According to said apparatus, when detecting higher special food container such as wine pot, can swivel plate be stopped in the position that produces the current value more smaller, with the efficient heated food more lower slightly than maximal efficiency than lowest high-current value.Therefore, can prevent from the part of food is concentrated strong heat energy, make evenly heating effectively of food.

As seen from the above description, micro-wave oven of the present invention obtains following effect.

The device of being put down in writing according to the present invention, owing to set the stop position of swivel plate according to the current value of the elementary or inferior utmost point side of high-tension transformer, in the halted state of swivel plate to cooking room internal radiation microwave, the not influence of the shape of receptor and the position of placement etc. so can try one's best evenly and is efficiently heated food.

The device of being put down in writing according to the present invention, swivel plate are to be uneven shape to direction of rotation.For this reason, can form abundant heating mode, so can obtain being adapted to the best stop position of various container shapes etc.

The device of being put down in writing according to the present invention has disposed peristome at the middle body of swivel plate.Therefore, the microwave that the base plate by cooking room reflects upward shines food by peristome, and the heat energy that adds of food is more effectively carried out.

According to device of the present invention, owing to be that testing result at current sensing means is on the peaked position swivel plate to be stopped, so food can heat with the efficient of maximum.

The device of being put down in writing according to the present invention, the stop position owing to begin to set through the current value after the stipulated time swivel plate according to the driving from heater is correctly detected so Electric Field Distribution can be used as current value.

The device of being put down in writing according to the present invention owing to be to keep the current value of certain state to set the stop position of swivel plate according to the on/off ratio that makes converter circuit, is correctly detected so Electric Field Distribution can be used as current value.

The device of being put down in writing according to the present invention owing to be to make swivel plate stop at desired location according to the elapsed time since fiducial time, so do not need to detect the sensor of swivel plate reference position, make to constitute and oversimplifies.

The device of being put down in writing according to the present invention rotates swivel plate again, and sets stop position again.Thereby when Electric Field Distribution changed with elapsed time, when during perhaps stop position is last time set error being arranged, stop position was corrected, so more evenly heating effectively of food.

The device of being put down in writing according to the present invention, according to the testing result of current sensing means, control change device circuit.Thereby, can be used for the current sensing means of detection Electric Field Distribution change and the current sensing means of converter current control, oversimplify so can make to constitute.

The device of being put down in writing according to the present invention, the content of operation of adding automatic-cooking key in the testing result of current sensing means, the stop position of setting swivel plate.Thereby, can obtain being suitable for the mode of heating of food automatically, make more evenly heating effectively of food.

The device of being put down in writing according to the present invention shows detecting the swivel plate stop position, so can prevent the user the rotation of swivel plate and the inharmonious sensation that stops.

The device of being put down in writing according to the present invention has added the stop position that the food containers shape is set swivel plate in the testing result of current sensing means.Thereby, can prevent a part to extraordinary shaped food container, concentrate very strong heat energy, food can evenly and effectively be heated.

Below with reference to the accompanying drawings, embodiments of the invention are elaborated:

Fig. 1 is the figure (flow chart of expression control device control content) of expression the 1st embodiment of the present invention.

Fig. 2 represents the flow chart of control device control content.

Fig. 3 represents the whole oblique view that constitutes.

Fig. 4 represents electric pie graph.

The oblique view of the rotation net stop position when glass is used in Fig. 5 (a) expression.

The stop position of rotation net when (b) bowl is used in expression.

Fig. 6 represents the plane of rotation net.

Fig. 7 (a) is the figure that represents rotation net stop angle and input current value relation in the experiment.

(b) be the figure that represents rotation net stop angle and gratin efficiency of heating surface relation in the experiment.

Fig. 8 is expression the 2nd embodiment of the present invention that is equivalent to Fig. 1.

Fig. 9 is the figure that is equivalent to Fig. 2.

Figure 10 is expression the 3rd embodiment of the present invention that is equivalent to Fig. 6.

Figure 11 is expression the 4th embodiment of the present invention that is equivalent to Fig. 6.

Figure 12 is expression the 5th embodiment of the present invention that is equivalent to Fig. 6.

Figure 13 is expression the 6th embodiment of the present invention that is equivalent to Fig. 6.

Figure 14 is expression the 7th embodiment of the present invention that is equivalent to Fig. 6.

Below with reference to Fig. 1～Fig. 7 the 1st embodiment of the present invention is described.

At first, in Fig. 3, cabinet 1 is the rectangular box of front openings, forms cooking room 2 in the inside of cabinet 1.This cooking room 2 is the rectangular box of front openings, and rotary door 3 is installed on cabinet 1, and the front openings place of cooking room 2 opens and closes by the rotating operation of door 3.

In cabinet 1, form Machine Room (not drawing among the figure) with the right-hand of cooking room 2 in abutting connection with ground, be provided with converter circuit 4 as shown in Figure 4 in the Machine Room.This converter circuit 4 through two power line 6 supply powers, is pressed following formation by AC mains source 5.

Two ac input ends that connect rectification circuit 7 on two power lines 6, the dc output end of rectification circuit 7 () are gone up and are connected power line 8.In addition, go up connection power line 9 at the dc output end (+) of rectification circuit 7.Insert series reactor (smoothly using リア Network ト Le) 10 on the power line 9.Symbol 11 is illustrated in the capacitor that is used to eliminate noise that connects between two power lines 6.

The series circuit that connects resonating capacitor 12 and IGBT13 between the power line 8 and 9 of rectification circuit 7.This IGBT13 has feedback diode 14, and between power line 8 and 9, the series circuit of resonating capacitor 12 and IGBT13 is connected in parallel with smmothing capacitor 15 again.

An end that connects primary coil 16 on the power line 8 of rectification circuit 7, the other end of connection primary coil 16 on the power line 9.This primary coil 16 and secondary coil 17 and the 18 common high-tension transformers 19 of forming.When the IGBT13 conducting at primary coil 16 upper reaches overcurrent I1, and when IGBT13 by the time electric current I 2 that flows through on the primary coil 16.High-tension transformer 19 is configured in the Machine Room.

The grid of IGBT13 connects driver IC 20, connects control device 21 on the driver IC 20.This control device 21 is that main body constitutes with the microcomputer, by driver IC 20 switches control IGBT13, to primary coil 16 supply powers of high-tension transformer 19.Converter circuit 4 is by above formation.

As shown in Figure 5, the right side wall of cooking room 2 is provided with supplying with the exciting mouth 22 of microwave in the cooking room 2, and exciting mouth 22 is configured in the lower end of the fore-and-aft direction middle body in the cooking room 2.Be arranged in the Machine Room in exciting mouth 22 peripheral parts and fixing waveguide (figure does not draw), be positioned at the Machine Room on this waveguide and connect the magnetron 23 (with reference to Fig. 4) that microwave takes place, as shown in Figure 4, two cathode ends of magnetron 23 are connected the two ends of the secondary coil 17 of high-tension transformer 19, the sun level end ground connection of magnetron 23.Magnetron 23 is equivalent to heater.

Two ends at the secondary coil 18 of high-tension transformer 19 are connected with voltage doubling rectifing circuit 24.The series circuit that the series circuit that this voltage doubling rectifing circuit 24 is made of 2 high-

voltage capacitors

25 and 2 kenetrons 26 constitute is connected in parallel and forms.When from 24 pairs of magnetrons of voltage doubling rectifing circuit 23 power supply, then magnetron vibration, from magnetron 23 through waveguide and exciting mouth 22 to cooking room 2 internal radiation microwaves (cooking in microwave oven).Symbol 27 expressions among Fig. 4 and two resistance that series circuit is in parallel and is connected of voltage doubling rectifing circuit 24.

The two ends that on two power lines 6 in AC mains source 5, connect primary coil 28.Primary coil 28 and secondary coil 29 common formation step-down transformers 30.The neutral earthing of secondary coil 29, the two ends of secondary coil 29 connect rectification circuit 31.This rectification circuit 31 is made up of two diodes 32, connects an end of resistance 33 on rectification circuit 31.

The other end of resistance 33 connects an end of capacitor 34.The other end ground connection of this capacitor 34.Control device 21 detects the supply voltage Vin in AC mains source 5 according to the terminal voltage of capacitor 34.In addition, on another power line 6 in AC mains source 5, current transformer (CT) 35 is housed.This CT35 is equivalent to current sensing means.Control device 21 detects the input current value Iin to converter circuit 4 according to the output signal of CT35.In addition, an end that on voltage doubling rectifing circuit 24, connects resistance 36.The other end ground connection of this resistance 36.Control device 21 detects the sun level current Ib of magnetron 23 according to the voltage that produces on the resistance 36.

Between two power lines 6 in AC mains source 5, through the contact 38 connection fan motors 39 of cooling fan relay 37.This fan motor 39 is configured in the Machine Room.Control device 21 makes contact 38 closures according to coil 40 supply powers to cooling fan relay 37, through two

power lines

6, and 5 pairs of fan motor 39 supply powers from the AC mains source.The rotating shaft of this fan motor 39 links cooling fan (not drawing among the figure).When to fan motor 39 supply powers, the cooling fan rotation is blown cooling air to the electric device in the Machine Room (high-tension transformer 19, magnetron 23 etc.).

Between two power lines 6 in AC mains source 5, the contact 42 of heater via relay 41 connects heater 43.This heater 43 is configured in the top in the cooking room 2, and control device 21 makes contact 42 closures by coil 44 supply powers to heater relay 41, from AC mains source 5 through 6 pairs of heater 43 supply powers of two power lines.Like this, heater 43 heatings are heated (the heater cooking) in the cooking room 2.

Contact 46 by RT relay 45 between two power lines 6 in AC mains source 5 connects RT motor 47.In this RT motor 47 reduction gear is housed.Control device 21 makes contact 46 closures by coil 48 supply powers to RT relay 45, like this from AC mains source 5 through 6 pairs of RT motor 47 supply powers of two power lines.Rotating shaft 49 (with reference to Fig. 3) rotation of RT motor 47.

RT motor 47 is configured in the below of cooking room 2.As shown in Figure 3, the rotating shaft 49 of RT motor 47 connects the base plate of cooking room 2, is projected in the cooking room 2, and it is OBL insertion section 50 that the tip portion of rotating shaft 49 forms section.Rotating shaft 49 is to rotate to certain orientation with fixed speed.49 360 ° of needed times of rotation of rotating shaft, difference was set at Tk second (10 or 12 seconds) with the difference of the frequency of power supply.

As shown in Figure 5, in 47 rotating shafts 49 of RT motor, be positioned at cooking room 2 and link the rotation net 51 that steel plate is made.As shown in Figure 6, this rotation net 51 is formed the frame 52 on every side of garden ring-type, most vertically rods 53 of fore-and-aft direction extension and the most lateral sticks 54 formation one vertical with vertical excellent 53.Be provided with the projection 55 of tubular at the core of rotation net 51.It is oblong-shaped that the inner face of this projection 55 forms section.Rotation net 51 removably cooperates with the outside of insertion section 50 by the inner face with projection 55, and the binding that makes it countershaft 49 can not be rotated.Rotation net 51 is equivalent to swivel plate.

Vertical excellent 53 of rotation net 51 is equally spaced to form with distance b, and distance b is set at less than " 1/4 " of microwave wavelength λ (about 122mm) (for example 30mm), and vertically the major part in the rod 53 is to take the strip that is continuous extension in the frame 52 on every side.And lateral sticks 54 is short strip shape, does not have one to take in the frame on every side 52 and extend continuously, the part in the lateral sticks 54 except the left and right directions middle body, and size of space a is set at more than " 1/2 " of microwave wavelength λ (for example 64mm).

In rotation net 51, except the left and right directions middle body, form most peristomes 56.These peristomes 56 are called the lateral sticks 54 drawn fixed parts by rectangular vertical excellent 53 and billet, and the formation width is that b, length are the oblong-shaped of a, peristome 56 only dislocation " a/2 " on fore-and-aft direction that left and right directions is adjacent.In addition, rotation net 51 is uneven shape concerning direction of rotation.And, equally before the shape of a mesh during Rotate 180 ° and the rotation become point symmetry (180 ° of rotation symmetries).

As shown in Figure 5, on rotation net 51, place circular cooking dishes 57 during cooking in microwave oven.This cooking dishes 57 is formed by the material that glass or pottery etc. can see through microwave, places food during cooking in microwave oven on cooking dishes 57.Rotation net 51 is by forming the steel plate punch process, and the enamel processing has been carried out on the surface of rotation net 51.

When during to cooking room 2 internal radiation microwaves, producing the standing wave of regulation according to the difference of the size of cooking room 2, the position of exciting mouth 22 and the shape of rotation net 51 etc. from the exciting mouth.Like this, because the Electric Field Distribution in the cooking room 2 is uneven, so the various piece heat energy in the cooking room 2 can be different.Particularly concerning rotation net 51, flow through electric current rectification on the bearing of trend of vertical rod 53 of rotation net 51 walls, simultaneously when the direction of the length of the direct of travel of microwave and peristome 56 is intersected, microwave is easily by peristome 56, and when the direction of the length of the direct of travel of microwave and opening portion is consistent, microwave is difficult to by peristome 56, so in general can obtain the Electric Field Distribution of uniqueness according to the anglec of rotation of rotation net 51.

As shown in Figure 3, be fixed with the guidance panel 58 that is positioned at the place ahead, Machine Room in the front of cabinet 1.In the front of this guidance panel 58 initiate key 59 is installed.At the rear of initiate key 59, dispose firing switch 60 as shown in Figure 4.This firing switch 60 is connected on the control device 21, and control device 21 detects the operation of initiate key 59 according to the output signal of firing switch 60.

As shown in Figure 3, in the front of guidance panel 58 automatic-cooking key 61 is housed, and, disposes automatic-cooking switch 62 as shown in Figure 4 at the rear of automatic-cooking key 61.This automatic-cooking switch 62 is connected on the control device 21, control device 21 is selected the automatic-cooking menu of " hot wine ", " thawing ", " green vegetables " etc. according to the content of operation of the output signal detection automatic-cooking key 61 of automatic-cooking switch 62 according to the content of operation of automatic-cooking key 61.

As shown in Figure 3, rotary graduated time ring 63 is installed in the front of guidance panel 58.The rear of graduated time ring 63, (ロ- リェ Application コ-ダ) 64 to dispose rotary encoder as shown in Figure 4.This rotary encoder 64 is connected on the controller 21, and controller 21 is set cooking time T according to the operational ton of output signal dial detection time 63 of rotary encoder 64 according to the operational ton of graduated time ring 63.

As shown in Figure 3, the LCD (LCD) 65 that is equivalent to display unit is installed in the front of guidance panel 58.This LCD 65 is connected on the control device 21 as shown in Figure 4, and control device 21 will be cooked cooking informations such as time T, residue cooking time and show on LCD 65.

Effect to above-mentioned formation describes below.Following operation is that control device 21 is carried out according to the control program that is stored in advance among the ROM.When control device 21 has detected initiate key 59 operations after cooking menu and the setting of cooking time T, then the step S1 from Fig. 1 forwards step S2 to, by to the coil 40 of cooling fan relay 37 and coil 48 supply powers of RT relay 45, begin fan motor 39 and RT motor 47.

When beginning fan motor 39 and RT motor 47, control device 21 will carry out switch control to IGBT13 by driver IC 20.And from 19 pairs of magnetron 23 supply powers of high-tension transformer, the vibration of beginning microwave.At this moment, according to the terminal voltage of capacitor 34 and the output signal computing " Vin * Iin " of CT35, the ON time of control IGBT13 makes " Vin * Iin " be certain value " Pin ".

When cooking in microwave oven began, control device 21 forwarded the step S3 of Fig. 1 to, judged to begin whether to have passed through official hour (for example 6 seconds) to magnetron 23 vibrational stabilizations from cooking in microwave oven.When the stipulated time has been passed through in judgement, then forward step S4 to, input current value Iin and reference value I o are compared.This reference value I o is the value that is stored in advance among the ROM of control device 21.When control device 21 when detecting " Io＞Iin ", forwards step S5 at step S4 to.

When forwarding step S5 to, control device 21 shows mistake on LCD 65, gives the user with abnormity notifying.And, make IGBT13 remain off state, the oscillation action of magnetron 23 is stopped.Meanwhile, disconnect by the coil 40 of cooling fan relay 37 and the coil 48 of RT relay 45,

open contact

38 and 46 stops the rotation fan motor 39 and RT motor 47.

When S4 detected " Iin 〉=Io " in the step of Fig. 1, control device 21 forwarded step S6 to, switched the control form of IGBT13.And, than (dutycycle) IGBT13 is carried out switch control with " Vin * Iin " irrelevant fixedly conduction and cut-off.At this moment, on LCD 65, show the information of " detecting stop position ", forward step S7 to.

At this state, owing to the anglec of rotation of the Electric Field Distribution in the cooking room 2 with rotation net 51 changes, so the anglec of rotation that the input current value Iin of converter circuit 4 revolves net 51 with commentaries on classics changes.(a) of Fig. 7 be represented rotation net 51 in the experiment the anglec of rotation (°) and input current value Iin (A) between relation.And Fig. 7 (b) be represented rotation net 51 in the experiment the anglec of rotation (°) and the efficiency of heating surface (%) of food between relation.

These experiments are to place food on rotation net 51, in the halted state of rotation net 51 measured the input current value Iin and the efficiency of heating surface.Used the container that can store 150cc water in the food.Can clearly find out from this figure, there is proportionate relationship between the input current value Iin and the anglec of rotation and between the anglec of rotation and the efficiency of heating surface, input current value Iin is efficiency of heating surface height when the big anglec of rotation, and input current value Iin efficiency of heating surface when the little anglec of rotation is low.

When forwarding the step S7 of Fig. 1 to, control device 21 is every just to detect input current value Iin through certain hours (for example 0.1 second), and the detection time that makes input current value Iin and input current value Iin, correspondence was stored one by one.The time started of this detection time with rotation net 51 is fiducial time (=0), passed through time T k when (51 1 all needed times of rotation of rotation net) when control device 21 detects at step S8, then forwards step S9 to.

When forwarding step S9 to, control device 21 detects maximum Imax and minimum Imin from the testing result of input current value Iin.Then, detect the Ta and Tb detection time of minimum of a value Imin detection time of maximum Imax, forward step S10 to.At this, Ta detection time of maximum Imax adds rotation net 51 rotations 1 all needed time T k, sets the stop position of rotation net 51.Meanwhile, Tb detection time with minimum of a value Imin adds time T k, other stop positions of setting rotation net 51.

When setting the stop position of rotation net 51, control device 21 forwards step S11 to.At this, the state of a control of IGBT13 turns back to previous status, and the ON time of control IGBT13 makes " Vin * Iin " remain on certain value " Pin ".Then, forward the step 12 of Fig. 2 to, according to the content of operation detection cooking menu of automatic-cooking key 61.Forward to when for example selecting " heating ", " hot wine ", " milk " etc. and go on foot S13.

When forwarding the step to during S13, control device 21 reaches moment of above-mentioned " Ta+Tk " in cooking time T, and the coil 48 of RT relay 45 is disconnected, and makes 47 outages of RT motor.And, remove the information of LCD 65 " detecting stop position ", and on LCD 65, demonstrate the information of " just stopping heating " in the power maximum of points.This RT motor 47 stops in order to make rotation in dump, and rotational resistance (speed reducing ratio of the reduction gear etc.) increase of inside is set.When 47 outages of RT motor, the rotating shaft 49 of RT motor 47 is stopped the rotation, and rotation net 51 stops on the position of efficiency of heating surface maximum.

When rotation net 51 stopped, control device 21 forwarded the step S14 of Fig. 2 to.At this, when detecting, remove the information of " just stopping heating " in the power maximum of points through cooking time T, stop the vibration of magnetron 23.The fan motor 39 that meanwhile stops the rotation finishes the cooking.

When control device 21 detects when having selected " green vegetables " to wait cooking menu, then forward step S15 at the step of Fig. 2 S12 to.And, disconnect RT motor 47 in cooking time T in the moment that reaches above-mentioned " Tb+Tk ", at the efficiency of heating surface net 51 that stops the rotation on for minimum position.And, remove the information of LCD 65 " detecting stop position ", and on LCD 65, show the information of " just stopping heating " at the power minimum point.Then, on going on foot S14, detect when having passed through cooking time T, remove the information of " stop to add at the MIN point and pine for ", end of cooking.

When detecting at step S12 control device 21 when having selected " thawing " to wait cooking menu, then forward to and go on foot S16.And, when cooking time T reaches moment of above-mentioned " Ta+Tk ", disconnect RT motor 47, be on the position of maximum in the efficiency of heating surface, rotation net 51 is stopped in (for example 10 seconds) at the appointed time.At this moment, remove the information of LCD 65 " detecting stop position ", and on LCD 65, show the information of " just stopping heating " in the power maximum of points.

After control device 21 makes rotation net 51 menelipsis cross no-go gage to fix time, forward the step S17 of Fig. 2 to.At this, relatively Ta and Tb are set at when " Ta＜Tb " " △ T1=Tb-Ta ".And be set at " △ T1=Tk-(Ta-Tb) " when working as " Ta＞Tb ", forward step S18 to.

When forwarding the step to during S18,21 of control device to RT motor 47 supply powers, make rotation net 51 rotate to the efficiency of heating surface and are minimum position in time △ T1, and only (for example 10 seconds) stop at the appointed time.And, remove the information of LCD 65 " just stopping heating " in the power maximum of points, on LCD 65, show " just the power minimum point stop heating " information.

When control device 21 makes 51 of rotation nets stop the stipulated time, forward step S19 to.At this, relatively Ta and Tb when " Tb＜Ta ", are set at " △ T2=Ta-Tb ".And when working as " Tb＞Ta ", be set at " △ T2=Tk-(Tb-Ta) ", forward step S20 to.

Do not passed through cooking time T when detecting at step S20,21 of control device forward step S16 to, according to only at time △ T2 to RT motor 47 supply powers, make rotation net 51 rotate to the efficiency of heating surface and be maximum position, only stop in (for example 10 seconds) at the appointed time.And, remove the information of LCD 65 " just stopping heating " at the power minimum point.Then, before through cooking time T, repeat to go on foot S16～S20.

1. control device 21 is carried out when cooking in microwave oven following～3. processing operation, prevent the ANOMALOUS VARIATIONS that the micro-wave oven that causes is exported because the change of power supply Vin and magnetron 23 temperature rise.Meanwhile, carry out processing operation 4., make it when irrecoverable abnormal conditions, to stop the cooking.

1. when the terminal voltage Vin of capacitor 34 reduced, the ON time of control IGBT13 made input current value Iin not surpass setting (for example 14.5A).

2. when magnetron 23 heatings, when the voltage Eb of Fig. 4 reduced, the ON time of control IGBT13 made sun level current value I b be no more than setting (for example 315mA).

3. when by above-mentioned 1. 2. control, when input power reduces, revise and cook time T.

4. when the cathode of magnetron 23 and the short circuit of sun level, when on voltage doubling rectifing circuit 24, producing short circuit and a sun level current value I b and surpassing setting, disconnect IGBT13, the cooking is stopped.

According to the foregoing description, the Electric Field Distribution in the input current value Iin of the primary side of high-tension transformer 19 and the cooking room 2 has proportionate relationship as can be seen, according to the testing result of input current value Iin, has controlled the stop position of rotation net 51.Therefore, shown in Fig. 5 (a), when placing glasses 66 by cooking dishes 57 on the rotation net 51, on the stop position of factors such as the shape of considering glass 66 and placement location, the adjustable point irradiating microwaves.In addition, shown in Fig. 5 (b), when placing bowl 67 on the rotation net 51, on the stop position of factors such as the shape of considering bowl 67 and placement location, the adjustable point irradiating microwaves is so the rice in milk in the glass 66 etc. and the bowl 67 etc. can evenly and effectively heat.

In addition, because rotation net 51 has formed uneven shape for direction of rotation, so the stop position difference of rotation net 51, Electric Field Distribution can great changes have taken place.Thereby, form abundant heating mode, can obtain being adapted to the best stop position of various container shapes and cooking menu etc.

In addition, rotation net 51 is to stop on input current value Iin is the position of maximum Imax, thereby the food on the rotation net 51 can heat with maximal efficiency, and the setting value of therefore cooking time T can very shortly get final product.

In addition, owing to be to begin to have set the stop position of rotation net 51 through stipulated time (6 seconds) input current value Iin afterwards according to the driving from magnetron 23, so can under the oscillation action stable status of magnetron 23, detect input current value Iin.Thereby, can truly reflect by input current value Iin corresponding to the change of the Electric Field Distribution of the position of rotation of rotation net 51, so can correctly detect lowest high-current value Imax and minimum current value Imin.

In addition, owing to be to set the stop position of rotation net 51 than the input current value Iin under the certain state of (dutycycle) maintenance, so the condition of power supply of magnetron 23 is remained on detection input current value Iin under certain state according to the on/off of converter circuit 4.Therefore, the change of the Electric Field Distribution of the position of rotation of corresponding rotation net 51 can be reflected truly by input current value Iin, just can correctly detect lowest high-current value Imax and minimum current value Imin from this point.

In addition, make rotation net 51 stop at desired location according to elapsed time " Tk+Ta " and " Tk+Tb " since fiducial time.Thereby, just do not need to detect the reference position of rotation net 51 with sensor, make rotation net 51 stop at desired location according to the elapsed time of reference position by sensor again, therefore do not re-use sensor, make to constitute and oversimplify.

In addition, make rotation net 51 when desired location stops, can think to begin to make rotation net 51 to rotate again, RT motor 47 be disconnected in the moment that lowest high-current value Imax and minimum of a value current value I min are detected again from detecting lowest high-current value Imax and minimum current value Imin.At this moment, make before rotation net 51 stops at desired location, need be with fixing dutycycle control change device circuit 4, so to set the cooking in microwave oven time shortening that output can be carried out.To this, if make rotation net 51 stop at desired location according to elapsed time " Tk+Ta " and " Tk+Tb ", just can therefore just can increase with the dutycycle control change device circuit 4 of very short time to fix to set the time of exporting the cooking in microwave oven that can carry out.

In addition, in input current value Iin, add the content of operation of automatic-cooking key 61, set the stop position of rotation net 51.Thereby, when carrying out " hot wine " etc., can rotation net 51 be stopped, with the maximal efficiency heated food, and when carrying out " green vegetables " etc., can be by rotation net 51 being stopped, with the minimum efficiency heated food at minimum current value Imin occurrence positions.When carrying out " thawing ", can be by rotation net 51 being stopped at the occurrence positions of lowest high-current value Imax and the occurrence positions of minimum current value Imin, replace heated food with maximal efficiency and minimum efficiency, so in general can obtain being suitable for the mode of heating of food automatically, food is heated more effectively.

In addition, according to the input current value Iin that CT35 detected, set the dutycycle of IGBT13.For this reason, but detect the current sensing means of Electric Field Distribution change and be used for the current sensing means dual-purpose that converter circuit 4 is controlled, therefore there is no need in addition current sensing means to be set, make to constitute and oversimplify.

In addition, the information that on LCD 65, has shown " detecting stop position ".Thereby can be with rotation net 51 rotation, the stop position that detects rotation net 51 is notified to the user, therefore can prevent rotation net 51 rotations, stop inharmonious sense that the user being caused.

In addition, the information that on LCD 65, has shown " just stopping heating " and " just stopping heating " at the power minimum point in the power maximum of points.Can be notified to the user with cooking like this, so the user is produced illusion can prevent that rotation net 51 from stopping because of failure and other reasons the time in the halted state of rotation net 51.

Below with reference to Fig. 8 and Fig. 9 the 2nd embodiment of the present invention is described.When control device 21 detects not through cooking time T on the step of Fig. 9 S20, forward step S21 to, cooking time T and a reference value T01 (for example 60 seconds) are compared.At this, if detect " T≤T01 ", then forward step S16 to, before through cooking time T, repeat to go on foot S16～S21.

When control device 21 when the step, S21 detected " T＞60 second ", then forward step S22 to, cooking time T and another a reference value T02 (for example 120 seconds) are compared.At this, when detecting " 60 seconds＜T≤120 seconds ", then forward step S23 to, the cooking elapsed time of cooking beginning as benchmark compared with " T-30 second ".When for example the elapsed time does not reach " T-30 second ", forward step S16 to, repeat to go on foot S16～S23.

When control device 21 detects the elapsed time when reaching " T-30 second " in the step 23, return the step S4 of Fig. 8, forward step S6 and step S7 to.At this, when IGBT13 being carried out switch control, detect input current value Iin at regular intervals with fixing dutycycle, S8 forwards S10 to through S9 from the step.

When forwarding step S10 to, control device 21 adds time T k on the Ta in the detection time of new maximum Imax, sets the new stop position of rotation net 51.Meanwhile, add time T k on the Tb in the detection time of new minimum of a value Imin, set another new stop position of rotation net 51.And, after the step makes the state of a control reinstatement attitude of IGBT13 on the S11, forward step S16～S23 of Fig. 9 to, before through cooking time T, rotation net 51 is alternately stopped on new stop position and new another stop position.

When control device 21 detects " T＞120 second " on the step of Fig. 9 S22, then forward step S24 to, elapsed time and " T-30 second " reach " 120-30 (=90) second " to compare.For example the elapsed time is not " T-30 second " neither return step S16 when " 90 seconds ", repeats to go on foot S16～S24.

When control device 21 detects the elapsed time when reaching " 90 seconds " at step S24, then turn back to the step S4 of Fig. 8.And on step S10, add time T k on the Ta in the detection time of new maximum Imax, set the new stop position of rotation net 51.Meanwhile, add time T k on the Tb in the detection time of new minimum of a value Imin, set another new stop position of rotation net 51.After this, forward step S16～S24 of Fig. 9 to, make rotation net 51 alternately stop at new stop position and another new stop position.

When control device 21 detects the elapsed time when reaching " T-30 second (＞90 seconds) " at step S24, then forward the step S4 of Fig. 8 to.And on step S10, add time T k on the Ta in the detection time of new maximum Imax, set the new stop position of rotation net 51.Meanwhile, add time T k on the Tb in the detection time of new minimum of a value Imin, set another new stop position of rotation net 51.Then, forward step S16～S24 to, before through cooking time T, make rotation net 51 alternately stop at new stop position and another new stop position.

According to the foregoing description, rotation net 51 is rotated again, the input current value Iin during according to the rotating again of rotation net 51 sets the stop position of rotation net 51 again.Thereby when the Electric Field Distribution in the cooking room 2 changes, and last time set when in the stop position error being arranged, revised stop position, so food can evenly more effectively heat.

In addition, when cooking time T short (below 60 seconds), the stop position of rotation net 51 is not revised.This boundary value 60 seconds was that the time that electric field is concentrated (concentrating of heat energy) does not take place.When the cooking time in short-term, in the scope that electric field concentrates does not take place, can obtain the effect of fixing a point to heat to greatest extent.

In addition, when cooking time T long (above 60 seconds), owing to revised the stop position of rotation net 51, so when rotation net 51 rotated again, the heat energy peptizaiton was on food.And, revise the change of Electric Field Distribution and the specification error of stop position according to setting again of stop position, so food can evenly heat effectively.

In above-mentioned the 2nd embodiment, cooking menu just is the stop position of having set rotation net 51 according to cooking time T again when " thawing ", but also be not limited only to this, when for example cooking menu and being the situation of " hot wine ", " milk ", " heating ", " green vegetables " etc., the same during also with " thawing ", can set the stop position of rotation net 51 again

In addition, in the above-mentioned the 1st and the 2nd embodiment, when maximum Imax that detects input current value Iin and minimum of a value Imin, rotation net 51 has been rotated 360., but also be not limited only to this, and for example, also rotatable 180 °.At this moment, because rotation net 51 forms 180 ° of rotation symmetric shapes, even, also can more correctly detect maximum Imax and minimum of a value Imin with 51 Rotate 180s of rotation net °.

Below with reference to Figure 10 the 3rd embodiment of the present invention is described:

Form around 4 peristomes 68 of projection 55 at rotation net 51, form 1 peristome 68 adjacently, and link to each other in abutting connection with 1 peristome 68 of ground formation with the below of 2 peristomes 68 of lower floor with the top of 2 peristomes 68 on upper strata.

Each peristome 68 quadrate, the length C longitudinally of each peristome 68 and lateral length C are set in " 1/4 " above (for example 31mm) of microwave wavelength λ.Rotation net 51 becomes inhomogeneous shape on direction of rotation, and the same before the shape of a mesh during half-twist and the rotation be 90 ° of rotation symmetric shapes.

According to the foregoing description, owing to formed peristome 68, so whether microwave is no matter be that stop position at rotation net 51 is all easily by peristome 68 at the middle body of rotation net 51.Like this, the microwave that reflects upward owing to the base plate by cooking room 2 passes through peristome 68, and irradiation is placed on the food of the middle body of rotation net 51.So food can more effectively be heated, cooking time T can shorten.

Below with reference to Figure 11 the 4th embodiment of the present invention is described:

In the rotating shaft 49 of RT motor 47, link swivel plate 69.This swivel plate 69 by frame 70 around circular, be positioned at core wheel hub (Ha Block) 71, and connect around 3 arms 72 of 71 of frame 70 and wheel hubs form one.The projection 73 of tubular is installed below the wheel hub 71.The inner face of this projection 73 becomes the section rectangle, 50 outside combines with the inner face of the projection 73 that can load and unload swivel plate 69 in the insertion section, make it to be attached at rotationally in the rotating shaft 49, swivel plate 69 is formed by steel plate, and the enamel processing has been carried out on the surface of swivel plate 69.

The arm 72 of swivel plate 69 is the radial extension in center in the equidistant installation of circumferencial direction with 120 ° with the wheel hub.When 120 ° of swivel plate 69 rotations, equally with shape before the rotation become 120 ° of rotation symmetric shapes.In addition, form 3 opening portions 74 on the swivel plate 69.These opening portions 74 be specially by with adjacent 2 arms 72 of circumferencial direction and frame 70 drawn fixed circular-arc parts on every side, the full-size e of each opening portion 74 is set at more than " 1/2 " of microwave wavelength λ.

According to the foregoing description, the wall electric current is on the bearing of trend of arm 72 in the rectification, because the position of rotation difference of opening portion 74, the state that sees through, reflects of microwave changes, and great changes have taken place so the stop position difference of swivel plate 69 makes cooking room 2 interior Electric Field Distribution.And, because 69 one-tenth 120 ° rotations of swivel plate symmetric shape, so swivel plate 69 every rotations just can obtain identical substantially Electric Field Distribution for 120 °.

Below with reference to Figure 12 the 5th embodiment of the present invention is described:

On the projection 71 of

swivel plate

69,3 opening portions 75 are in the uniformly-spaced formation of circumferencial direction with 120 °.75 one-tenth of these opening portions are circular-arc, concerning the opening portion 74 of periphery, 60 ° of circumferencial direction dislocation.

Below with reference to Figure 13 the 6th embodiment of the present invention is described:

Link by 4 arms 72 between frame 70 and the wheel hub 71 around the swivel plate 69.These arms 72 are in the uniformly-spaced configuration of circumferencial direction with 90 °, and swivel plate 69 forms 90 ° of rotation symmetric shapes.

Below with reference to Figure 14 the 7th embodiment of the present invention is described:

Between the frame 70 on every side and wheel hub 71 of swivel plate 69, link by 5 arms 72.These arms 72 are in the uniformly-spaced configuration of circumferencial direction with 72 °, and swivel plate 69 forms 72 ° of rotation symmetric shapes.

In above-mentioned the 1st～the 7th embodiment, be that rotation net 51 (or swivel plate 69) is stopped, but also be not limited only to this, shape detecting apparatus such as optical sensor for example also can be installed on the sidewall of cooking room 2, as long as detect higher food containers such as wine pot by shape detecting apparatus, just can detect about 80% the accurate lowest high-current value of lowest high-current value Imax, rotation net 51 (or swivel plate 69) is stopped in the position that accurate lowest high-current value takes place.At this moment owing to can prevent from the part of wine in the wine pot is concentrated strong heat energy, so the wine in the wine pot can evenly heat effectively.

In above-mentioned the 1st～the 7th embodiment, input current value Iin according to the primary side of high-tension transformer 19, set the stop position of rotation net 51 (or swivel plate 69), but also be not limited only to this, for example also can set the stop position of rotation net 51 (or swivel plate 69) according to the sun level current value I b of the magnetron 23 of high-tension transformer 19 secondary ends.At this moment, the resistance 36 used of current detecting can play the function of current sensing means.

In addition, in above-mentioned the 1st～the 7th embodiment, the person's of being to use operating time dial 63, manually setting cooking time T constitutes, but also be not limited only to this, for example also can detect the weight of food by weight sensor, control device 21 constitutes according to the automatic computing cooking of the output signal of weight sensor time T.Perhaps also can detect the gas flow that food sends, constitute according to the automatic end cooking of rolling up of the output signal of gas sensor by gas sensor.

In addition, in above-mentioned the 1st～the 7th embodiment, when making rotation net 51 (or swivel plate 69) rotation continuously, detected input current value Iin, but also be not limited thereto, detect input current value Iin when for example also can make its interrupted rotation with predetermined angular.

In addition, in above-mentioned the 1st～the 7th embodiment, detect the stop position of rotation net 51 (or swivel plate 69) in notice, and notice is when the halted state of rotation net 51 (or swivel plate 69) is cooked, LCD 65 has shown the information of " detecting stop position ", the information of " just stopping heating in the power maximum of points " and " just stopping heating at the power minimum point ", but also be not limited only to this, for example also can display pattern and figure.

In addition, in above-mentioned the 1st～the 7th embodiment, be that driving with rotation net 51 (or swivel plate 69) begins as fiducial time (=0), elapsed time " Ta+Tk " and " Tb+Tk " have been carried out timing, but also be not limited only to this, for example also can be controlling the moment (going on foot S6) of form with fixed duty cycle conversion IGBT13 as carrying out timing fiducial time (=0).

In addition, in above-mentioned the 1st～the 7th embodiment, be according to elapsed time " Ta+Tk " and " Tb+Tk ", make rotation net 51 (swivel plate 69) stop at desired location, but also be not limited only to this, for example also can be from detecting lowest high-current value Imax and minimum current value Imin, rotation net 51 (or swivel plate 69) is rotated again, in the moment that detects lowest high-current value Imax and minimum current value Imin again, cut off RT motor 47, make it stop at desired location.At this moment, making before rotation net 51 (or swivel plate 69) stops at desired location, preferably by fixing dutycycle control change device circuit 4.

In addition, in above-mentioned the 1st～the 7th embodiment, be the micro-wave oven that the present invention is used to have the heater cooking function, but also be not limited only to this, for example also go for the cooking in microwave oven special machine.

In addition, in above-mentioned the 1st～the 7th embodiment, be to be that example is described as heater, but also be not limited only to this, the device of food heating is got final product so long as produce microwave with magnetron 23 to cooking room 2 internal radiation microwaves.

Claims

1, a kind of micro-wave oven is characterized in that having:

The high-tension transformer that AC power is boosted;

Drive the motor of above-mentioned swivel plate rotation;

2, the micro-wave oven put down in writing of claim 1 is characterized in that:

Swivel plate becomes uneven shape on direction of rotation.

3, the micro-wave oven put down in writing of claim 1 is characterized in that:

4, the micro-wave oven put down in writing of claim 1 is characterized in that:

5, the micro-wave oven put down in writing of claim 1 is characterized in that:

6, the micro-wave oven put down in writing of claim 1 is characterized in that:

7, the micro-wave oven put down in writing of claim 1 is characterized in that:

8, the micro-wave oven put down in writing of claim 1 is characterized in that:

9, the micro-wave oven put down in writing of claim 1 is characterized in that:

10, the micro-wave oven put down in writing of claim 1 is characterized in that:

11, the micro-wave oven put down in writing of claim 1 is characterized in that:

12, the micro-wave oven put down in writing of claim 1 is characterized in that: