CN102265092A - Microwave cooking device - Google Patents

Abstract

The present invention relates to a microwave cooking device comprising: a heating chamber (34) which is provided with a glass-equipped door (31b) located at the front face opening and is adapted to contain an object to be heated; a waveguide tube (33) for transmitting to the heating chamber (34) a microwave emitted from a microwave generating section (32); an electricity supply section (39) having directivity and supplying the microwave from the waveguide tube (33) to the heating chamber (34); a drive section (41) for rotationally driving the electricity supply section (39); and a control section (411) for controlling the drive section (41) such that the microwave is supplied to a space above a tray, with the electricity supply section (39) directed to the door, using the inside of the glass as the main transmission path for the microwave. A thaw function and a grill function can be automatically and continuously performed without operation by the user.

Description

The heating using microwave cooking device

Technical field

The present invention relates to heating object is carried out the heating using microwave cooking device of eddy-current heating.

Background technology

Micro-wave oven as representational heating using microwave cooking device can directly heat the simplicity that need not to prepare pot, meal pot as the food of heating object owing to having, thereby becomes cooking appliance indispensable in the daily life.In recent years, following product is practical: in order to heat a plurality of tablewares side by side, form the bottom surface of taking in the heating interior space of food smooth, and make width dimensions more than 400mm and bigger than depth size, thus the heating clamber with shape that transverse width is wide, convenience is high.

In addition, along with the multifunction of micro-wave oven, on market, occurred possessing so-called " baking function ", the product of " function of thawing "." baking function " refers to, and uses the so-called heating plate that is provided with the microwave-absorbing bodies such as ferrite that absorb microwave and generate heat at lower surface, utilizes microwave that heating plate is heated up, thereby the food of institute's mounting carried out the function of cooking.In addition, " function of thawing " refers to, and utilizes microwave or steam or both combinations to heat, thus the function that frozen food is thawed.

With reference to Figure 14, above-mentioned existing heating using microwave cooking device 300 is described.Heating using microwave cooking device 300 comprises: magnetron 302, waveguide 303, heating clamber 301, mounting table 306, power supply (antenna space) 310, rotable antenna 305, motor 304, heating plate 308, pan arrest portion 307 and heater 309.

Magnetron 302 is representational microwave generation equipment.The microwave transmission that waveguide 303 will be radiated by magnetron 302 is to heating clamber 301.Heating clamber 301 is at heating target things (not shown) such as inner mounting food, for utilizing the hot work that adds that microwave carries out.Mounting table 306 is made of low loss inductive materials such as pottery with character that microwave can easily see through or glass, and mounting table 306 is fixed in the heating clamber 301, is used for mounting heating target thing.

Power supply 310 is to form than the antenna space of the mounting table in the heating clamber 301 306 by the below.For the microwaves in the waveguide 303 are emitted in the heating clamber 301, rotable antenna 305 is in that 310 scope is installed near the central authorities of heating clamber 301 from waveguide 303 to power supply.Motor 304 drives rotable antenna 305 rotations.Heating plate 308 is arranged in the heating clamber 301 according to purposes, pan arrest portion 307 supporting heating plates 308.Heater 309 carries out the electric heating heating.

Carry out directly heat the heating function of heating object by heating using microwave in, under food etc. is positioned over state on the mounting table 306, begin microwave heating treatment.The microwave that radiates from magnetron 302 via waveguide 303 and rotable antenna 305 and from the radioactive department upper surface of rotable antenna 305 towards heating clamber 301 radiation.At this moment, usually, in order in heating clamber 301 microwave to be stirred, rotable antenna 305 is radiated microwaves (for example, with reference to patent documentation 1) in the constant speed rotation.

When carrying out the function of thawing that heats by heating using microwave as the frozen food of heating object, at first frozen food is positioned over stable on heating pallet or square position, and the pallet or the square position of this state is positioned on the mounting table 306.Then, select to thaw function, the running of beginning heating using microwave cooking device.Reach predetermined temperature at heating object, or turn round when having carried out setting-up time, thawing running finishes (for example, with reference to patent documentation 2).

In the baking function of carrying out the straight cooking, food (for example chicken leg, fish etc.) is positioned on the heating plate 308, and heating plate 308 is positioned over pan arrest portion 307 with burning roasting formula.Under this state, utilize the surface portion of 309 pairs of food of heater of the upper side that is positioned at food to carry out heat treated.On the other hand, utilize the back side of the 308 pairs of food of heating plate that absorb microwave and heat up to carry out heat treated.

In addition, about heating using microwave cooking device 300, except the structure that constitutes as described above, roughly rectangular a plurality of peristomes that also possessing of having is located at around the heating plate main body are slot, and to be provided with the slot packaged unit with respect to slot loading and unloading mode freely, described slot packaged unit forms (for example, with reference to patent documentation 3) by the rubber that with the ferrite is main component.

Possess in the heating using microwave cooking device of slot at this, when carrying out the function of thawing that the frozen food as heating object is heated, frozen food is positioned over stable on heating pallet or square position, and this pallet or square position are positioned on the mounting table 306.Then, unload the slot packaged unit to open wide slot, choice menus, the running of beginning heating using microwave cooking device.Reach predetermined temperature at heating object, or turn round when having carried out setting-up time, thawing running finishes.

Yet, in the existing heating using microwave cooking device of above-mentioned patent documentation 2 records, when utilizing baking function to cook frozen food, need after carrying out the above-mentioned function of thawing, further carry out menu and set, carry out baking function then.For this reason, have to be located at predetermined pan arrest portion 307 and carry out baking function once more, force the user to carry out numerous and diverse operation at the heating plate 308 that will be placed with the food after thawing after finishing again that thaws.

Therefore, if will under the state that at first heating plate 308 is arranged at heating clamber 301, carry out the function of thawing continuously to baking function, can't obtain expected effect by the heating plate 308 that sets to frozen food.Promptly, because it is very close to each other substantially between the circumference of heating plate 308 and the inwall of heating clamber 301, therefore the microwave that emits to heating clamber 301 equably from power supply 310 (rotable antenna 305) lower surface that is heated dish 308 covers, can't be around the upper surface side to heating plate 308.

In addition, be used at existing heating using microwave cooking device need after function is thawed in execution, carrying out menu once more and setting under the situation of the cooking of frozen food, carry out baking function then 3 records of above-mentioned patent documentation.For this reason, have to seal slot at the end back assembling slot packaged unit that thaws, the heating plate that is placed with the food after thawing is located at predetermined pan arrest portion again and is carried out baking function, the urgent user that still is eager to excel carries out numerous and diverse operation.

The prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2004-071216 communique

Patent documentation 2: Japanese kokai publication hei 09-229372 communique

Patent documentation 3: TOHKEMY 2007-225186 communique

Summary of the invention

The invention provides a kind of heating using microwave cooking device, even it has the heating plate of heating object to be located under the situation in the heating clamber in mounting, the operation that also need not the user just can automatically thaw continuously function and baking function.

Structure of the present invention comprises: heating clamber, and described heating clamber is provided with the door that glass is installed at the front surface opening part, and this heating clamber is taken in heating object; Microwave penetrating mounting table, described mounting table constitute the bottom surface in the described heating clamber; Metal heating plate, described heating plate is provided with microwave-absorbing body at lower surface, and this heating plate is assemblied in described heating clamber in the mode that can load and unload, this heating plate mounting heating object; The microwave generating unit; Waveguide, described waveguide will be from the microwave transmission of described microwave generating unit to described heating clamber; The directionality power supply, described directionality power supply has directionality, and it supplies to described heating clamber with described microwave from described waveguide; Drive division, described drive division drive described directionality power supply rotation; Control part, described control part is controlled described drive division, so that described directionality power supply is towards the direction of described door, and as main transmission path microwave is supplied to the space of the top of described heating plate in the described glass; And power supply, described power supply forms to such an extent that lean on the below than described mounting table, and this power supply is taken in described directionality power supply.

According to said structure, needn't use optional feature or existing parts are processed, just can with in the door as the transmission path use of microwave.That is, can not make structure complicated, can efficiently utilize dead space increase microwave to heating plate top around the amount of reaching (Hui り Write body amount).Thus, can finish making heating object directly absorb microwave and the cooking with the corresponding expection of kind of heating object such as thaw, and can improve the efficiency of heating surface.Therefore the operation that can need not the user just can automatically thaw continuously function and baking function, have been located under the situation in the heating clamber at the heating plate that mounting is had heating object.

Description of drawings

Fig. 1 is the elevational cross-sectional view of internal structure that the micro-wave oven of the heating using microwave cooking device that relates to as an embodiment of the invention is shown.

Fig. 2 is the figure that the 2-2 cross section of the micro-wave oven among Fig. 1 is shown.

Fig. 3 A be used for illustrating present embodiment the rotation wave conduit towards, the 3-3 cutaway view of micro-wave oven among Fig. 1.

Fig. 3 B be used for illustrating present embodiment micro-wave oven the rotation wave conduit towards, another 3-3 cutaway view among Fig. 1.

Fig. 3 C be used for illustrating present embodiment micro-wave oven the rotation wave conduit towards, another 3-3 cutaway view among Fig. 1.

Fig. 4 is the key diagram of initial point testing agency of the rotation wave conduit of the micro-wave oven in the present embodiment.

Fig. 5 is the structure chart of structure of the control part of the micro-wave oven of expression in the present embodiment.

Fig. 6 is the flow chart of the action of the micro-wave oven in the expression present embodiment.

Fig. 7 is the figure of the structure of the Temperature Detector that adopts of the micro-wave oven of expression in the present embodiment.

Fig. 8 is the vertical view of variation that the rotation wave conduit of the micro-wave oven in the present embodiment is shown.

Fig. 9 A is the vertical view of the heating plate of the micro-wave oven in the explanation present embodiment.

Fig. 9 B is the side view of the heating plate of the micro-wave oven in the explanation present embodiment.

Fig. 9 C is the cutaway view along the 9C-9C among Fig. 9 A of the heating plate of the micro-wave oven in the explanation present embodiment.

Figure 10 A be at the opened portion of the rotation wave conduit of the micro-wave oven in the present embodiment with respect to heating plate towards and microwave to the upper surface side of heating plate around the key diagram that reaches.

Figure 10 B be at the opened portion of the rotation wave conduit of the micro-wave oven in the present embodiment with respect to heating plate towards and microwave to the upper surface side of heating plate around another key diagram that reaches.

Figure 11 A is the key diagram around the confirmation method of reach amount of the microwave of the micro-wave oven in the present embodiment to heating plate.

Figure 11 B is the microwave of the micro-wave oven in the present embodiment another key diagram around the confirmation method of the amount of reaching to heating plate.

Figure 11 C is the another key diagram around the confirmation method of reach amount of the microwave of the micro-wave oven in the present embodiment to heating plate.

Figure 12 A be the micro-wave oven in the present embodiment the rotation wave conduit opened portion with respect to heating plate towards and the key diagram around the relation between the amount of reaching of microwave.

Figure 12 B be the micro-wave oven in the present embodiment the rotation wave conduit opened portion with respect to heating plate towards and another key diagram of microwave around the relation between the amount of reaching.

Figure 13 is the figure of the relation shown in the presentation graphs 12B.

Figure 14 is the elevational cross-sectional view that the internal structure of existing micro-wave oven is shown.

The specific embodiment

(embodiment)

Below, the heating using microwave cooking device that embodiments of the present invention is related to reference to Fig. 1～Figure 13 is that example describes with the micro-wave oven.

As depicted in figs. 1 and 2, micro-wave oven 31 is equipped with a 31b at main body 31a.31a is built-in with in main body: heating clamber 34, and it takes in heating objects such as food; Magnetron 32, it produces the microwave that heating object is carried out cooking; And waveguide 33, it is connected with magnetron 32 for microwave being imported in the heating clamber 34.Front surface at heating clamber 34 is formed with front surface opening 38.

Door 31b is installed on main body 31a, and constitute can be freely with opening and closing covering be formed at the front surface opening 38 of heating clamber 34.Door 31b can be installed on main body 31a via sliding types such as hinge or employing sliding doors.At micro-wave oven 31 is under the situation of embedded type, door 31b can be installed on main body 31a with the form of pulling out.Under the situation of installing, can be installed on any one party in left side, right side or the downside of front surface opening 38 via hinge.

Door 31b possesses: metallic plate 60; Inner glass 61 and outside glass 62 from fore-and-aft direction clamping metallic plate 60; And the blocking cap of the peripheral part of covered metal plate 60 (choke cover) (not shown).Be formed with a plurality of through holes with front surface opening 38 opposed positions so that inside that can visuognosis heating clamber 34 at metallic plate 60.Peripheral part at metallic plate 60 is formed with choke structure 63.

In Fig. 2, show for example by metallic plate 60 bendings repeatedly being formed the situation of choke structure 63.In addition, preferably, terminal by being formed at metallic plate 60 and a plurality of slits that are provided with predetermined interval with the terminal part bending that forms the broach shape repeatedly, form choke structure 63.Choke structure 63 is being formed under the situation of broach shape, the quantity of slit is not particularly limited.

Inner glass 61 plays the effect of a face that constitutes heating clamber 34 under the state of closing a 31b.Inner glass 61 makes can carry out visuognosis to the inside of heating clamber 34 under the state of closing a 31b.Outside glass 62 plays the effect of the outer surface that constitutes door 31b.The same with inner glass 61, outside glass 62 makes can visuognosis heating clamber 34 under the state of closing a 31b.

Micro-wave oven 31 possesses mounting table 35, power supply (antenna space) 37, rotation wave conduit 39, motor 41, control part 411 and optical chopper (photo interrupter) 36.In addition, heating clamber 34 is connected with the top of waveguide 33, and heating clamber 34 forms the space of width size (approximately 400mm) shape bigger than depth direction size (approximately 310mm).Mounting table 35 is made of low loss inductive materials such as pottery with character that microwave can easily see through or glass, and mounting table 35 is fixed in the heating clamber 34 with the food (not shown) of mounting as representational heating object.

Power supply 37 forms to such an extent that lean on the below than the mounting table in the heating clamber 34 35.Rotation wave conduit 39 is installed in the power supply 37 and with the microwave in the waveguide 33 and emits in the heating clamber 34.Motor 41 is the drive divisions that drive 39 rotations of rotation wave conduit.Thereby control part 411 be control motor 41 control rotation wave conduits 39 rotation and towards control part.Optical chopper 36 constitutes the initial point testing agency of the initial point of the rotation that detects each rotation wave conduit 39.

In addition, rotation wave conduit 39 is the directionality power supply, and it has the opened portion 58 shown in Fig. 3 A～Fig. 3 C, and can to opened portion 58 towards direction concentrated area radiated microwaves.

Get back to Fig. 1,, be provided with the heater 401 that can carry out the electric heating heating in the upper surface part of heating clamber 34.In addition, heating clamber 34 has the pan arrest portion of three layers of supporting heating plate 402.Specifically, heating clamber 34 has upper strata pan arrest portion 403, middle level pan arrest portion 404 and pan arrest portion of lower floor 405.In addition, the upper strata is referred to as pan arrest portion 400 with pan arrest portion 403, middle level with pan arrest portion 404 and pan arrest portion of lower floor 405.

With reference to Fig. 9 A～Fig. 9 C heating plate 402 is described.Fig. 9 A illustrates the vertical view of observing heating plate 402 from the top.Fig. 9 B illustrates the side view of observing heating plate 402 from the side.Fig. 9 C illustrates along the cutaway view of the 9C-9C among Fig. 9 A.Heating plate 402 is by constituting with the lower part: the periphery 402a of frame shape; And plate 402c, it is formed at periphery 402a inboard, and is formed with the groove 402b (not shown in Fig. 9 C) of a plurality of desired depths side by side at this plate 402c.Heating object is stated from this plate 402c, and mounting is in heating clamber 34.And, be provided with microwave-absorbing body 406 (for example, ferrite) in the rear side (by mounting table 35 sides) of plate.

As shown in Figure 5, operating portion 31c is disposed at the front surface bottom of a 31b.The operating portion 31c person of being to use can be according to the equipment of food and the various cooking menus of cooking content choice.For example, can set heat time heating time, selection " heating function ", " function of thawing ", " thawing and baking function " and predefined automatic-cooking menus such as " baking functions " by operating portion 31c.

" heating function " refers to by come the cooking method of heated food to the food radiated microwaves." function of thawing " refers to the heating means of the frozen food that utilizes following method: to the freezing food method that heats of radiated microwaves or utilize the method that the Steam Heating frozen food thaws or the combination that utilizes said method come the method for defrosting food continuously or intermittently.

" thaw and baking function " and refer to, the opened portion 58 that makes rotation wave conduit 39 is towards being any direction in front surface opening 38 directions of heating clamber 34 or the gap direction between the inwall of heating plate 402 circumferences and heating clamber 34 around the direction that reaches the heating plate upper surface easily, make mounting absorb microwave and after thawing, then cooking food after thawing by " baking function " described later in the frozen food of heating plate 402.In the present embodiment, make the front surface opening 38 of the opened portion 58 of rotation wave conduit 39 towards heating clamber 34, enforcement more heating plate upper surface heating mode of quantity delivered in the microwave of heating plate 402 upper surfaces is supplied with makes mounting absorb microwave and after thawing in the frozen food of heating plate 402, then cooks food after thawing by " baking function " described later.

" baking function " refers to and makes microwave concentrate on mounting to have the microwave-absorbing body 406 of rear side of the heating plate 402 of food to come the high temperature heating.Refer to via the cooking method of heating plate 402 heated foods with by making up the cooking method that heating plate 402 after the described intensification and heater take heated food.

Based on the output signal from operating portion 31c, control part 411 is carried out these menus by control magnetron 32 and motor 41.

The micro-wave oven 31 that present embodiment relates to the position of the radiation high directivity of rotation wave conduit 39 be opened portion 58 be controlled to be predetermined towards, particularly in " thawing and baking function ", increase microwave thawing efficiently to the upper surface of heating plate 402 around the amount of reaching in first half term.And constituting in the second half makes microwave concentrate on the microwave-absorbing body 406 of rear side of plate of heating plate 402 and structure that it is generated heat efficiently.The concrete back that is controlled at is narrated.

Get back to Fig. 2, joint portion 46 is made of the conductive material roughly cylindraceous of the combined hole (not shown) that connects circular, and the combined hole of described circular is located at the interface of waveguide 33 and bottom of heating chamber 42.Radioactive department 48 is made of the area of the horizontal direction conductive material bigger than the area of approximate vertical direction, and is electrically connected on the upper end of joint portion 46 and integrated by riveted joint or welding etc.Rotation wave conduit 39 possesses joint portion 46 and radioactive department 48.

In addition, rotation wave conduit 39 is to be matched with the center of joint portion 46 axle 50 of motor 41 as the mode at the center of rotation driving.Owing to radioactive department 48 is fixing with respect to the direction of rotation shape, therefore constitute to have the radiation directionality.The center of the center configuration of the rotation of rotation wave conduit 39 in heating clamber 34.

Shown in Fig. 3 A～Fig. 3 C, radioactive department 48 constitutes, observe from the top, it is the trapezoidal shape on base that radioactive department upper surface 52 forms with opened portion 58 sides, in the four edges of trapezoidal shape, has radioactive department bend 54 on three limits except that the base, so that limit these three limits radiated microwaves laterally to bottom of heating chamber 42 (Fig. 1) lateral bending song.

In this structure, identical with existing micro-wave oven when utilizing " heating function " to heat general food equably, need not to stick to especially the place to place, rotation wave conduit 39 also can constant samely rotation.In addition, under the situation that the angle midway in rotation stops more can to heat equably, also can be stopped.Be constant rotation in the present embodiment.

Under the situation that the frozen food that utilizes " function of thawing " to the mounting table 35 of mounting in heating clamber 34 heats, rotation wave conduit 39 is rotated at interval with preset time and stop, and under the situation that constant rotation more can be heated equably, also can constantly rotate.Be constant rotation in the present embodiment.

Utilizing " thawing and baking function " frozen food to be carried out under the situation of cooking, the heating plate 402 that will be loaded with frozen food be located at predetermined pan arrest portion 400, for example upper strata with the state of pan arrest portion 403 under entry into service.The opened portion 58 of rotation wave conduit 39 is towards the front surface opening 38 of heating clamber 34, microwave arrives the top of heating plate 402 via the inner glass 61 of door 31b, the frozen food of mounting in heating plate 402 thawed, after this thaws, then utilize baking function to carry out cooking.

Utilize " baking function " to mounting under the situation that the food of heating plate 402 heats, in the opened portion 58 of rotation wave conduit 39 under the state of preposition (for example different towards) with front surface opening 38, the action of rotation wave conduit 39 is stopped, perhaps also can carry out constant rotation.

With reference to Fig. 3 A～Fig. 3 C, the predetermined stop position of rotation wave conduit 39 is described.In the micro-wave oven 31 that present embodiment relates to, control part 41 is stored the angle information (stop position) of rotation wave conduit 39 to be benchmark by the detected initial point of initial point testing agency with optical chopper 36.With the opened portion 58 of the rotation wave conduit 39 shown in Fig. 3 A towards the state of the direction of door 31b the time as 180 °, (not shown) is as origin position (0 degree) with backwards the time.

Fig. 3 A towards down, microwave is concentrated radiation to the inner glass 61 of door 31b.And the microwave that radiates passes through gap, the inside of inner glass 61 and the clearance space between inner glass 61 and the metallic plate 60 between heating plate 402 and the inner glass 61, and around the top that reaches heating plate 402.Wherein, for the microwave that advances in inner glass 61, inner glass 61 is a dielectric, the wavelength of the microwave that advances at dielectric be shortened dielectric dielectric constant subduplicate inverse doubly.Thus, under the situation that for dielectric constant is 4～9 glass, be equivalent to exist about 2～3 times spatial joint clearance of the thickness of slab of glass.Thereby, utilize this bigger gap, the major part that emits in the microwave of inner glass 61 sides can be around the top that reaches heating plate 402.On the other hand, be suitable for " baking function " rotation wave conduit 39 towards being not to decide without exception, but at least should be with different towards the state of door 31b direction.Thereby consider to try to achieve by experiment in advance suitable towards, and it is stored in control part 411.

For example shown in Fig. 3 B, in the opened portion 58 of rotation wave conduit 39 during with respect to door 31b direction and towards the right flank direction of heating clamber 34, thereby concentrate on and be positioned over the upper strata and make efficiently with the heating plate 402 of pan arrest portion 403 under the result's that heating plate 402 heats up the situation obtaining microwave, with this position (for example from initial point to 0 ° of clockwise direction ROT13), the stop position of the rotation wave conduit 39 of " baking function " when heating plate 402 is positioned over the upper strata with pan arrest portion 403 and be stored in control part 411.

Then, " baking function " when heating plate 402 being positioned over the middle level with pan arrest portion 404, for example shown in Fig. 3 C, in the opened portion 58 of rotation wave conduit 39 during towards the left surface direction of heating clamber 34, thereby concentrate under the situation that heating plate 402 makes the result that heating plate 402 heats up efficiently obtaining microwave, with this position (for example from initial point to 230 ° of clockwise direction rotations), the stop position of the rotation wave conduit 39 of " baking function " when heating plate 402 is positioned over the middle level with pan arrest portion 404 and be stored in control part 411.

As mentioned above, micro-wave oven 31 according to the position of heating plate 402 control rotation wave conduit 39 towards.For make rotation wave conduit 39 towards predetermined towards, adopt stepping motor as motor 41, perhaps for the motor of constant rotation, consider the detection reference position and control method such as conduction time.

With reference to Fig. 4, initial point testing agency is described.In the present embodiment, the axle 50 at the stepping motor that is used as motor 41 is provided with initial point testing agency.Initial point testing agency is made of the plectane 36a and the optical chopper 36 that with axle 50 are central shaft.Be provided with the slit 36b of rectangular shape at plectane 36a.

Plectane 36a is installed on the axial region of the axle 50 of the motor 41 that makes rotation wave conduit 39 rotation, and rotates in the mode of the light path of covering the optical chopper 36 that possesses light-emitting component and photo detector.

According to this structure, when slit 36b passes through the light path of optical chopper 36, do not cover the thing of described light path, therefore can detect passing through constantly of slit 36b.Therefore, be the initial point of rotation wave conduit 39 by set positions with slit 36b, can detect the initial point of rotation wave conduit 39 by the optical chopper 36 that is installed on each motor 41.

Then, with reference to Fig. 5 control part 411 is described.Control part 411 comprises antenna control part 412 and storage part 413.Antenna control part 412 is controlled the action of rotation wave conduit 39 by the action of control motor 41.The positional information (angle information) of storage part 413 storage rotation wave conduits 39.

Antenna control part 412 is controlled motor 41 from storage part 413 with reference to necessary information according to the command signal from operating portion 31c, thus the action of control rotation wave conduit 39.The positional information of the rotation wave conduit 39 that the positional information of the storage part 413 rotation wave conduit 39 that each placement location (upper strata, middle level, the lower floor) storage in heating clamber 34 is suitable for thawing at heating plate 402 and being suitable for heats heating plate 402.Specifically, the positional information 416 of the barbecue usefulness in positional information 415 of the barbecue usefulness on the positional information 414 of the usefulness of thawing on storage upper strata (as initial point to clockwise direction Rotate 180 °), upper strata (from initial point to 0 ° of clockwise direction ROT13) and middle level (from initial point to 230 ° of clockwise direction rotations) etc.

Then, with reference to Fig. 6, the action of the micro-wave oven 31 that present embodiment is related to is specifically described.At first, power supply is inserted micro-wave oven 31, in step S102, become holding state.

In step S102, be in the state of accepting that utilizes the selection of the menu that operating portion 31c carries out by the user of accepting.Specifically, operating portion 31c selects corresponding menu signal Sm to control part 411 outputs with the selected menu of user.In the present embodiment, the user selects " heating function ", " thawing and baking function ", " baking function " or other menus according to the content (kind of food) of the heating object of wanting to heat.In addition, also comprised heating plate 402 in the menu by the position of mounting (upper strata, middle level or lower floor).

Be judged as under the situation of having selected " heating function ", operating portion 31c is to the menu signal SmA of antenna control part 412 output expressions " heating function ".Then, control advances to step S103.

In step S103, antenna control part 412 response menu signal SmA make rotation wave conduit 39 rotate with constant speed by motor 41 is rotated with constant speed.Then, control advances to the step S104 of back.

In step S104, control part 411 makes magnetron 32 actions, beginning heat treated.Then, control advances to the step S105 of back.

In step S105, timer picks up counting.After confirming to have passed through the first scheduled period P1, the step S106 after control advances to.

In step S106, the action of magnetron 32 grades stops, based on the heat treated end of " heating function ".

Under the situation of having selected " thawing and baking function " in step S102, operating portion 31c has selected the menu signal SmB of " thawing and baking function " to the 412 output expressions of antenna control part.Then, control advances to the step S107 of back.

In step S107, antenna control part 412 judges based on menu signal SmB whether the position of 402 mountings of heating plate is the upper strata.In addition, " thaw and baking function " and form kinds such as to select meat, fish and Pizza.Then, control advances to the step S108 of back.

In step S108, antenna control part 412 is based on the positional information of judging in step S107 and control the action of motor 41 with reference to corresponding position information from storage part 413.Specifically, antenna control part 412 comes with reference to the positional information in the storage part 413 416 based on the positional information among the menu signal Sm that judges in step S107.Thus, the action of antenna control part 412 control motor 41 is so that rotation wave conduit 39 rotates to microwave easily around direction, for example front surface opening 38 (180 °) direction of the upper surface that reaches heating plate 402 and stop.Then, control advances to the step S109 of back.

In step S109, stop at rotation wave conduit 39 under the state in the precalculated position of controlling by S108, control part 411 makes magnetron 32 work, beginning heat treated.Then, control advances to the step S110 of back.

In step S110, after through predetermined dwell time, rotation wave conduit 39 is rotated a circle once more, locate to stop the scheduled time at 180 ° then.Like this, repeat the rotation and 180 ° stop.Then, control advances to the step S111 of back.

In step S111, timer picks up counting.After confirming to have passed through the second scheduled period P2, the step S112 after control advances to.During this period, owing to continue to be in microwave, therefore can make food defrosting efficiently easily around the state of the upside that reaches heating plate.

In step S112, whether judging thaws finishes.Whether (being not among the S112) is then proceeded to thaw, and is judged to thaw in step S112 and finish under the unclosed situation of thawing.Repeat this process till the end of thawing.Under the situation about being through with of thawing (among the S112 for being), because ends of thawing, so, advance to step S113 in order then to be transferred to " baking function ".After this, should be transferred to " baking function " for baked food, this similarly carries out baking with the situation of having selected " baking function " in above-mentioned step S102 (being the original situation with regard to not freezing food of baking) and gets final product.

In step S102, under the situation of having selected " baking function ", operating portion 31c has selected the menu signal SmC of " baking function " to the 412 output expressions of antenna control part.Then, control advances to the step S113 of back.In addition, above-mentioned menu signal SmA, SmB and this menu signal SmC are referred to as menu signal Sm together.

In step S113, antenna control part 412 judges that based on menu signal SmC the position of 402 mountings of heating plate is upper strata, middle level or lower floor.In addition, " baking function " forms the kind that can select to be roasted gratin as fish, chicken leg, roast beef, roast chicken, Pizza and Spain seafood paella (paella) etc.In advance the position of mounting dish is stored as upper strata, middle level, lower floor accordingly with this kind of being roasted gratin, and by utilizing " baking function " selected kind by the barbecue gratin to judge the position of mounting dish.Yet the present invention is not limited thereto, and for example also can detector be set in each pan arrest portion 403～405, according to the signal judgement dish position from described detector.Then, control advances to the step S114 of back.

In step S114, antenna control part 412 is based on menu signal SmC and control the action of motor 41 with reference to corresponding position information from storage part 413.For example, selecting under the situation of baking function on the upper strata by operating portion 31c, with positional information 415, the action of control motor 41 rotates to from initial point to the position of 0 ° of clockwise direction ROT13 and stop at this position rotation wave conduit 39 to antenna control part 412 with reference to the upper strata.Then, control advances to the step S115 of back.

In step S115, under the state that rotation wave conduit 39 is stopped, control part 411 makes magnetron 32 work, beginning heat treated.Then, control advances to the step S116 of back.In step S116, after rotation wave conduit 39 has passed through predetermined dwell time, rotation wave conduit 39 is rotated a circle once more, locate to stop the scheduled time at 130 ° then.Like this, repeat the rotation and 130 ° stop.Then, advance to step S117.

In step S117, timer picks up counting, after confirming to have passed through the 3rd scheduled period P3, and the step S118 after control advances to.During this period, owing to continue to be in the ferritic state that microwave concentrates on the heating plate back side easily, so heating plate intensification, the bottom surface of baked food efficiently.

In step S118, magnetron 32 is stopped, after step S119 in, drive heater 401 specifically.Then, after step S120 in, timer picks up counting, after confirming to have passed through the 4th scheduled period P4, the step S106 after control advances to.During this period, can utilize heater 401 upper surface of baked food efficiently.

In step S106, after the action of rotation wave conduit 39, heater 401 and magnetron 32 etc. stopped, the heat treated of " baking function " finished.

By above structure, the micro-wave oven 31 that present embodiment relates to has the pan arrest portion 403～405 of three layers (upper strata, middle level, lower floors) at heating clamber 34, and can select cooking menu according to pan arrest portion position, can utilize " baking function " cooking numerous food.

For example, when not having the food materials of thickness to make existing barbecue dish with fish, chicken leg etc., use upper strata (pan arrest portion 403).When cooking the bigger food materials of roast beef, roast chicken and so on, use middle level (pan arrest portion 404).And about lower floor (pan arrest portion 405), Pizza, Spain seafood paella and so on need back side firepower, get final product but the firepower of upper surface is relatively mild firepower, therefore can improve cooking performance by spacing out with the upper surface heater.

In addition, be that ferrite absorption microwave generates heat by the microwave-absorbing body 406 that makes the lower surface that is attached at heating plate 402, can fire the lower surface of gratin.In addition, about the upper surface of gratin, can heat and realize the upper surface cooking by carry out heater with the heater 401 that is disposed at heating clamber 34 upper surfaces.In addition, in order efficiently the back side of heating plate 402 to be heated, control the stop position of the rotation wave conduit 39 of heating using microwave cooking device by pan arrest portion position.

The distribution of microwave changes according to the position of heating plate 402 mountings, so the interim stop position difference of rotation wave conduit 39, and this stop position is obtained as described above by experiment in advance, and is stored in storage part 413.By making motor 41 possess initial point testing agency, can control the stop position of rotation wave conduit 39 exactly, can realize the heating of peak efficiency in each pan arrest portion 403～405 positions.In such " baking function ", the microwave that propagates into the upper space (mounting has the space of food) of heating plate 402 reduces, and therefore can prevent that the moisture of inside of food from exceedingly evaporating.

In addition, the example that when having selected to thaw with baking function or baking function rotation wave conduit 39 is stopped to be described, but the action of rotation wave conduit 39 control is not limited thereto.

For example also can be that the antenna control part 412 of control part 411 is that the center makes the about predetermined angular of rotation wave conduit 39 reciprocally swingings (for example ± 5 degree) with angle on target (stop position).Thus, can make and distribute very evenly and can not have influence on the efficiency of heating surface of heating plate.This reciprocally swinging action can be carried out when heating begins, also can (after for example, 30 seconds～1 minute) beginning pass through the scheduled time when heating begins after.

In order to carry out this reciprocally swinging action, control part 411 constitutes to have: stop upper limit time storage part, it stores the upper limit time of allowing that rotation wave conduit 39 stops in advance; Dwell time timing portion, it carries out timing to the time that rotation wave conduit 39 stops; And reciprocal angle storage part, its storage makes the angle of rotation wave conduit 39 reciprocally swingings.

In addition, also can constitute, when implementing baking function during from the heating beginning through (for example, after 30 seconds～1 minute) after the scheduled time, make rotation wave conduit 39 rotation predetermined angulars (for example, 5 degree).

In addition, for same purpose, also can control the rotary speed of rotation wave conduit 39.For example, also can constitute, near the precalculated position, make rotation wave conduit 39 rotate slowly, and rotate with constant speed, thereby make microwave concentrate on heating plate 402 in other positions.In this case, try to achieve by experiment in advance too and near which position, which kind of speed the rotation wave conduit is controlled to be and makes microwave concentrate on heating plate.

Store as initial point when in addition, control part 411 is positioned at rotation wave conduit 39 in predetermined stop position (angle).And control part 411 for example before heat treated is carried out or after the heat treated execution, is carried out the initial point detecting pattern of the initial point of confirming rotation wave conduit 39 together with " heating function ", " baking function ".

In the initial point detecting pattern, can not determine the angle of rotation wave conduit 39, vibration produces microwave under this state, causes the heated condition of non-original idea sometimes and causes bad.Therefore, control part 411 when in the initial point detecting pattern, drive rotation wave conduit 39 during in, the control that the action of magnetron is stopped.

In addition, control part 411 finishes the back in heat treated and carries out the initial point detecting pattern, standby when detecting under the state of initial point in non-heating.Thus, can prevent from before heat treated begins, to produce the stand-by time that is used for the initial point detection.

Fig. 7 shows an example of the Temperature Detector that is used for the detected temperatures distribution.Temperature Detector 10 comprises infrared-ray detecting element 13, housing 18 and stepping motor 11.Infrared-ray detecting element 13 is arranged on the substrate 19 with forming a line, and housing 18 is taken in whole base plate 19, and stepping motor 11 makes housing 18 move in the direction that the direction with infrared-ray detecting element 13 arrangements intersects vertically.

On substrate 19, be provided with: metal tank body 15, infrared-ray detecting element 13 is enclosed wherein; And electronic circuit 20, it handles the action of infrared-ray detecting element 13.Be provided with the lens 14 that pass through for infrared ray at tank body 15.Be provided with at housing 18: the infrared ray that passes through for infrared ray passes through hole 16; With the hole of passing through for lead 17 from electronic circuit 20.

According to this structure,, housing 18 is moved in the vertical direction of the direction that forms a line with infrared-ray detecting element 13 by rotatablely moving of stepping motor 11.The reciprocal spinning movement of the stepping motor 11 by Temperature Detector can detect the Temperature Distribution of the roughly All Ranges in the heating clamber 34.

To the rotation wave conduit is that one situation is illustrated, but the quantity of rotation wave conduit 39 is not limited thereto, and also can be more than two.For example as shown in Figure 8, the width that also can constitute at heating clamber 34 has two rotation wave conduits 90 and 91.

In Fig. 8, the central authorities of rotation wave conduit 90 and 91 opened portion 92 and 93 separately in heating clamber 34 dispose neighbouringly.In this case, also be can try to achieve two rotation wave conduits 90,91 in advance by experiment microwave is easily around the upside that reaches heating plate 402 when being in which kind of position and concerning, perhaps microwave concentrates on heating plate 402.

By a plurality of rotation wave conduits 39 are set, increased rotation wave conduit 90 and 91 stop position combination (for example, a rotation wave conduit 90 is positioned at origin position, and another rotation wave conduit 91 revolve to counter clockwise direction from initial point turn 90 degrees etc.), the variable-width of microwave control broadens.Therefore, can make microwave more efficiently, perhaps make microwave concentrate on heating plate 402 around the upside that reaches heating plate 402.Consequently, can improve the efficiency of heating surface of thawing of " thawing and baking function " and the efficiency of heating surface of barbecue.On the other hand, can also heat the left-half of heating plate 402 or the zone of right half part or the first half or the latter half in the concentrated area, the variation of cooking method has also increased.

In the present embodiment, radiated microwaves in the following direction heating clamber 34 of heating clamber 34, but also power supply 37 can be located at the top of heating clamber 34, from the top radiated microwaves of heating clamber 34, make microwave around the lower surface that reaches heating plate 402.

Then, with reference to Figure 10, Figure 10 B, Figure 11 A～Figure 11 C and Figure 12 A, 12B, to the opened portion 58 of rotation wave conduit 39 with respect to heating plate 402 towards and relation between the amount of the microwave that the upper surface of heating plate 402 is supplied with describe.Figure 10 A shows the state of observing the heating plate 402 (Fig. 9) of the pan arrest portion 400 that is located at heating clamber 34 from the top.Figure 10 B shows from the direction of the inner glass 61 of door 31b and observes with the situation of heating using microwave mounting in the state of the food of heating plate 402.In addition, as among Figure 10 A with shown in the wave-like line, rotation wave conduit 39 towards micro-wave oven 31 laterally, promptly parallel direction with respect to door 31b.

Shown in Figure 10 A, very close to each other substantially between the wall about the heating clamber 34 of heating plate 402 and micro-wave oven 31.Therefore, the microwave M W that radiates from magnetron 32 via the opened portion 58 of rotation wave conduit 39 towards with respect to the inwall approximate vertical about heating clamber 34 and with the direction radiation of door 31b and rear wall protuberance 420 (circulating fan unit accommodating section) almost parallel.Therefore, emit to reflections such as sidewall about by heating clamber 34 of microwave major part in the heating clamber 34, pan arrest portion 400, and final most ofly absorb by microwave-absorbing body 406.And, be converted to heat by microwave-absorbing body 406, from the direct heated food F of downside.

In addition, though also exist on a small quantity from the microwave of the gap between heating plate 402 and a 31b and the rear wall protuberance 420 (circulating fan unit accommodating section), but be not sufficient to the food of mounting in heating plate 402 be heated from upside around the upper side that reaches heating clamber 34.That is, under such state, be not suitable for the heating of thawing of frozen food.Therefore, in the present invention, under the function of thawing, at first make the opened portion 58 of rotation wave conduit 39 be positioned at respect to door 31b approximate vertical towards, make microwave face toward a 31b or facing to 420 radiation of rear wall protuberance.As mentioned above, heating plate 402 and the door 31b between and between the sidewall of heating plate 402 and rear wall protuberance 420 sides, have the gap.

The major part of the microwave that radiates from the opened portion 58 of rotation wave conduit 39 is crossed heating plate 402 and the upper side of arrival heating clamber 34 via the gap between the sidewall of the gap between heating plate 402 and the door 31b and heating plate 402 and rear wall protuberance 420 sides.Described microwave is reflected by the inwall of heating clamber 34, and is used to mounting is used the heating object (food) of pan arrest portion 403 in the upper strata heating.That is use as main transmission path from microwave to the upper surface of heating plate 402 that supply with in the space between the inwall that, will be 420 that produces owing to door 31b and rear wall protuberance, result from heating clamber 402 and heating clamber 34.

Though also exist by the sidewall about heating clamber 34, pan arrest portion 400 and mounting table 35 reflections and the microwave that absorbed by microwave-absorbing body 406, its amount is far smaller than the situation of opened portion 58 towards the direction parallel with door 31b that make.As mentioned above, inner glass 61 is installed, and about 2～3 times spatial joint clearance transmission path at interval that these inner glass 61 conducts are equivalent to the thickness of slab of self plays a role, therefore can supply with microwave to the upside of heating plate 402 effectively at door 31b.

Thereby, in the present invention, under the situation of selecting " thawing and baking function ",, at first, rotation wave conduit 39 is positioned at makes opened portion 58 and the opposed position of door 31b in order to make up above-mentioned main transmission path.Under this state, with predetermined first heat time heating time T1 supply with microwave, supply with microwave to the upper surface side of the heating plate 402 of heating clamber 34, frozen food etc. is thawed.And, if necessary, next, making rotation wave conduit 39 action (rotation), it is parallel with door 31b towards, and T2 supply second heat time heating time microwave to be scheduled to that opened portion 58 is become.Thus, can make microwave-absorbing body 406 heating, thus the food that thawed from downside heating or baking.

In addition, in above-mentioned method, concentrating (first scheduled time T1) that microwave is supplied to the upside of heating plate 402 at first and thawing from the top with frozen food, concentrate (second scheduled time T2) that microwave is supplied to microwave-absorbing body 406 then, thereby heat the frozen food after thawing from the below.In this case, after the upside of frozen food was heated (thawing), downside just was heated, and existed the uneven situation of heat distribution of food.Consider such situation, also can be intermittently or make the change in location of opened portion 58 by spells.

Specifically, at first be not continuous first heat time heating time T1 ground make opened portion 58 stop at parallel with a 31b towards, but stop time of lacking than first heat time heating time, frozen food is thawed slightly.Then, make opened portion 58 be positioned at towards vertical with door 31b towards the position, and to heat (barbecue) than the short time utilization microwave-absorbing body 406 of second T2 heat time heating time.Repeat this action.In the method, direct heating (thawing) total time of utilizing microwave and the heating that utilizes microwave-absorbing body 406 (barbecue) total time needn't be necessarily with first heat time heating time T1 and second heat time heating time T2 identical, be suitably to determine.

In addition, beyond above-mentioned two kinds of methods, can opened portion 58 not stopped at predetermined direction yet, and rotation wave conduit 39 is rotated with constant speed.In this case, according to opened portion 58 towards, utilize the upper surface supply to heating plate 402 microwave heating (function of thawing) and utilize the heating (baking function) of microwave-absorbing body 406 of the lower surface of heating plate 402 to hocket continuously.

Then, with reference to Figure 11 A～Figure 11 C and Figure 12 A, 12B, to the opened portion 58 of rotation wave conduit 39 in heating clamber 34 towards and the relation of microwave between the amount that the upside of heating plate 402 is supplied with describe.Can confirm by the mode shown in Figure 11 A～Figure 11 C around the amount of the upper surface side that reaches heating plate 402 via the gap (mainly referring to inner glass 61) between the inwall (comprising a 31b) of heating plate 402 and heating clamber 34 at the microwave that the lower face side of heating plate 402 radiates.

Heating plate 402 shown in Figure 11 A～Figure 11 C is corresponding diagram 9A～Fig. 9 C respectively.The amount of microwave can be confirmed in the temperature of the water of the upper surface of heating plate 402 by mounting.At first, place insulator as the heat insulation separator S that uses at the upper surface of heating plate 402.Mounting is held the resin container V that the water of 150cc W is arranged thereon.In addition, heat insulationly be used to prevent that with separator S the heat from heating plate 402 from conducting to water W via resin container V, thereby the temperature of only measuring by the water W that produces around the microwave that reaches rises.

When the amount with water W is made as m[g], the specific heat capacity of water W is made as C, the temperature of water W is risen is made as Δ T, will be made as t[s heat time heating time] time, can shown in formula (1), show the electric power P[W that water W absorbs].

P＝4.19×m×C×ΔT/t ····(1)

Wherein, in the present embodiment, C=1, m=150g.

Specifically, utilizing micro-wave oven 31 heating t=180[s] time, be that 20 ℃ water W reaches under 60 ℃ the situation in initial temperature, can obtain formula (2) according to formula (1).

P＝4.19×150×1×(60-20)/180＝140[W] ····(2)

Then, with reference to Figure 12 A, Figure 12 B, to the opened portion 58 of rotation wave conduit 39 towards and microwave around the relation between the amount of reaching (with respect to opened portion 58 towards the directionality of microwave) describe.Figure 12 A be shown in Figure 10 A mounting in the vertical view of the heating plate 402 of heating clamber 34 inside.In the figure, nearby side is a door 31b side, and the depth side is rear wall protuberance 420 (circulating fan unit accommodating section) side, and the right side is the right inwall side of heating clamber 34, and the left side is the left inwall side of heating clamber 34.Observe from the opened portion 58 of rotation wave conduit 39, described direction is respectively 180 °, and 0 °, 90 ° and 270 °.

In Figure 12 B with angle represent high directivity rotation wave conduit 39 (opened portion 58) towards.With towards rear wall protuberance 420 (circulating fan unit accommodating section) side be oriented benchmark (0 °), with the clockwise direction of observing from the top be+side.Being benchmark around the amount of reaching under the situation of rotation, and every 15 ° of diagramizations poor with benchmark be shown.According to this figure as can be known, secondly directionality (door 31b side) before 180 ° are is that towards bigger, the left and right sides is less in back (rear wall protuberance 420 sides) towards maximum.

Figure 13 show opened portion 58 towards, microwave around the amount of reaching and poor with rotation.That is, as can be known, rotation wave conduit 39 is being remained opened portion 58 under the situation of the position of door 31b (inner glass 61) side, can supply with the microwave that radiates from rotation wave conduit 39 to the aspect of heating plate 402 efficiently.In addition, in opened portion 58 under the situation of rear wall protuberance 420 (circulating fan unit accommodating section) side, microwave around the amount of reaching also than towards about the situation of inwall side big.

Based on the opened portion 58 of the rotation wave conduit 39 that so obtains towards with the relation (Figure 12) around the amount of reaching (directionality of microwave) of microwave, position (angle) and time that rotation wave conduit 39 is stopped.

According to more than, in micro-wave oven 31, control part 411 make opened portion 58 microwave M W around the many primary importance D1 of the amount of reaching with first scheduled time T1 radiated microwaves MW, and microwave M W around the few second place D2 of the amount of reaching with second scheduled time T2 radiated microwaves MW, thereby can under the state of heating plate 402, begin to carry out cooking continuously from thawing in mounting to frozen food.In addition, primary importance D1 is the position of 180 ° or 0 ° in Figure 12 B, and second place D2 is the position of 90 ° or 270 °.In addition, primary importance D1 and second place D2 can suitably determine according to micro-wave oven 31.

In addition, also can be that control part 411 makes microwave M W after primary importance D1 radiates first scheduled time T1 continuously, makes microwave M W radiate second scheduled time T2 continuously in second place D2.In addition, also can be, control part 411 repeat following process until first little heat time heating time Δ T1 and second little Δ T2 heat time heating time summation separately reaches first scheduled time T1 and more than second scheduled time T2: make microwave M W behind the first short little heat time heating time Δ T1 of primary importance D1 T1 of continuous first scheduled time of emission ratio, make microwave M W in the second place D2 T2 of continuous second scheduled time of emission ratio short second little heat time heating time Δ T2.

In addition, in the present embodiment, the mode of using the heating plate 402 that is provided with microwave-absorbing body 406 has been described.As other embodiments, can consider to replace heating plate 402 and use the stable on heating pallet that microwave-absorbing body 406 is not set.In this case, also can access such effect identical with the present invention: will use as the transmission path of microwave in the door, control rotation wave conduit 39 towards, regulate around the microwave of the top that reaches pallet around the amount of reaching.

In addition, also can be, possess the temperature detecting part of the temperature that detects heating object, only low and be judged to be under the situation of freezing product in the temperature of heating object, control part 411 makes as the rotation wave conduit 39 of directionality power supply towards the direction of door 31b and stop.Thus, can bring into play the function of thawing, increase the top import to heating plate 402 microwave around the amount of reaching, thereby thaw efficiently.

Higher and be judged to be under the situation of refrigerated item or normal temperature product in the temperature of heating object, owing to needn't thaw, therefore can be less around the amount of reaching.Thus, needn't make rotation wave conduit 39 towards the direction of door 31b and stop, getting final product thereby the performance baking function carries out baking efficiently.

Increasing under the situation of the amount of reaching, need not to make rotation wave conduit 39 from all stopping till to the end at first.Also can repeat after stopping preset time, to be rotated such action.At this moment, consideration is according to the temperature change dwell time of heating object.The low more dwell time that then increases of temperature, the high more dwell time that then shortens of temperature, thus can control around the amount of reaching by a plurality of grades according to the temperature of heating object.

In addition, also can be, possess the weight detecting portion of the weight that detects heating object, particularly under the very heavy situation of the weight that is judged as heating object, control part 411 makes rotation wave conduit 39 towards the direction of door 31b and stop.Consider that size is also bigger basically under the heavier situation of weight, and the bigger article of size exist the tendency that only is difficult to heat by heat conducting words middle body.In this case, think to heat and then be heated to middle body easily with microwave.Therefore, make rotation wave conduit 39 towards the direction of door and stop, increasing around the microwave of the top that reaches heating plate around the amount of reaching, thereby can efficiently bigger article be heated to central authorities.

Under the lighter situation of the weight of judging heating object, think that size is also less basically, even and the less article of size only exist the tendency that also can be heated to middle body by the heat conduction, therefore less also passable around the amount of reaching.Therefore, do not make rotation wave conduit 39 towards the direction of door and stop, and the performance baking function get final product to carry out baking efficiently.

Increasing under the situation of the amount of reaching, need not to make rotation wave conduit 39 from all stopping till to the end at first.Also can repeat after stopping preset time, to be rotated such action.At this moment, consider to change dwell time according to the weight of heating object.The heavy more dwell time that then increases of weight, the light more dwell time that then shortens of weight, thus can control around the amount of reaching by a plurality of grades according to the weight of heating object.

In addition, although used dish beyond the heating plate 402 etc. to have safety approach under the situation that mistake uses, can form and have the structure that mistake is used judging part as the menu of having selected " thawing and baking function ".In this case, under the situation that the mistake that mistake uses judgement section judges to go out heating plate 402 is used, control part 411 preferably makes rotation wave conduit 39 not stop and continuing rotation.

Usually, under the situation of using regular heating plate 402, control part 411 can make rotation wave conduit 39 towards the direction of door and stop, and microwave is absorbed by food efficiently around reaching on the heating plate.In addition, owing to have the microwave-absorbing body 406 that absorbs microwave, therefore can consume all microwaves in the heating clamber safely at the lower surface of heating plate.

Under the situation of not using regular heating plate 402, think to exist and for example do not put into heating plate 402 and only food to be placed mounting table, perhaps put into the metal dish that is different from heating plate 402, perhaps heating plate 402 and food all forget put into and under no-load condition, begin fully and so on cause the situation that mistake is used.Especially, put into the metal dish different, do not have the part that can absorb microwave, then do not have the part that can absorb microwave fully if form no-load condition at the lower surface of metal dish with heating plate 402.At this moment, the electric field grow in the heating clamber 34, but if further rotation wave conduit 39 is stopped, then existing highfield and concentrate on local possibility.Therefore, be judged as the mistake use under the situation of heating plate 402, rotation wave conduit 39 is not stopped and continuing the rotation, thereby can prevent that highfield from concentrating on the part.

In addition, under the situation that is judged as the mistake use, also consider to reduce or stop the output of microwave.Use judging part as concrete mistake, can form when heating plate 402 is assemblied in heating clamber 34 by heating plate 402 push switches.Rigging position deploy switch in the end of heating plate 402 under the situation that switch is not pressed, can be judged as and not use regular heating plate 402 such mistakes to use.

Mistake as other is used judging part, also can have the temperature detecting part of the temperature that detects at least one side in heating plate 402 or the heating object.Under the situation that detects the temperature different, can be judged as and not use regular heating plate 402 such mistakes to use with predetermined temperature.

In addition, use judging part, also can have the weight detecting portion of the weight that detects at least one side in heating plate 402 or the heating object as other mistake.Under the situation of the weight that varies in weight that detects and be scheduled to, can be judged as and not use regular heating plate 402 such mistakes to use.

With reference to detailed and specific embodiment the present invention has been described, but can have applied various changes and correction with not breaking away from the spirit and scope of the present invention, this is apparent to those skilled in the art.

Industrial utilizability

The present invention can heat continuously from thawing, and therefore can be used in microwave heating equipments such as micro-wave oven.

Label declaration

31: micro-wave oven (microwave heating equipment); 31a: main body; 31b: door; 31c: operating portion; 32: magnetron (microwave generator); 33: waveguide; 34: heating clamber; 35: mounting table; 37: power supply; 38: the front surface opening; 39: rotation wave conduit (directionality power supply); 41: motor; 42: bottom of heating chamber (mounting table); 58: opened portion; 60: metallic plate; 61: inner glass (glass); 62: outside glass; 90: the rotation wave conduit; 91: the rotation wave conduit; 92: opened portion; 93: opened portion; 400: pan arrest portion; 402: heating plate (pallet); 402a: periphery; 402b: groove; 402c: plate; 403: upper strata pan arrest portion; 404: middle level pan arrest portion; 405: pan arrest portion of lower floor; 406: microwave-absorbing body; 411: control part; 412: the circulating fan unit accommodating section; 420: the rear wall protuberance.

Claims (14)

1. heating using microwave cooking device, it possesses:

Heating clamber, described heating clamber is provided with the door that glass is installed at the front surface opening, and this heating clamber is taken in heating object;

The mounting table of microwave penetrating, described mounting table constitute the bottom surface in the described heating clamber;

Pallet, described pallet is assemblied in described heating clamber in the mode that can load and unload, this pallet mounting heating object;

The microwave generating unit;

Waveguide, described waveguide will be from the microwave transmission of described microwave generating unit to described heating clamber;

The directionality power supply, described directionality power supply has directionality, and it supplies to described heating clamber with described microwave from described waveguide;

Drive division, described drive division drive described directionality power supply rotation;

Control part, described control part is controlled described drive division, so that described directionality power supply is towards the direction of described door, and as main transmission path described microwave is supplied to the space of the top of described pallet in the described glass; And

Power supply, described power supply form to such an extent that lean on the below than described mounting table, and this power supply is taken in described directionality power supply.

2. heating using microwave cooking device according to claim 1, wherein,

Described pallet is the heating plate that is provided with microwave-absorbing body at lower surface.

3. heating using microwave cooking device according to claim 1, wherein,

This heating using microwave cooking device also possesses operating portion, described operating portion response user's operation and export the menu signal of the cooking menu of the selected heating object of expression user,

Described control part based on described menu signal control described drive division change described directionality power supply towards, the control microwave is to the quantity delivered in the space up and down of described pallet.

4. heating using microwave cooking device according to claim 3, wherein,

Described control part makes described directionality power supply stop at described directionality power supply towards the position of predetermined direction.

5. heating using microwave cooking device according to claim 3, wherein,

Described control part makes described directionality power supply swing at described directionality power supply near the position of predetermined direction.

6. heating using microwave cooking device according to claim 3, wherein,

Described control part makes near deceleration predetermined direction of described directionality power supply on one side in utilizing the process of heating using microwave, Yi Bian make described directionality power supply rotation.

7. heating using microwave cooking device according to claim 4, wherein,

Described predetermined direction is the direction of described door.

8. heating using microwave cooking device according to claim 4, wherein,

Described control part makes described directionality power supply stop at described directionality power supply in the starting stage of cooking running towards the position of predetermined direction.

9. heating using microwave cooking device according to claim 1, wherein,

This heating using microwave cooking device also possesses the temperature detecting part of the temperature that detects heating object,

Described control part is controlled described drive division based on the temperature of described heating object, change described directionality power supply towards, the control microwave is to the quantity delivered in the space up and down of described pallet.

10. heating using microwave cooking device according to claim 1, wherein,

This heating using microwave cooking device also possesses the weight detecting portion of the weight that detects heating object,

Described control part is based on the described drive division of the Weight control of described heating object, change described directionality power supply towards, the control microwave is to the quantity delivered in the space up and down of described pallet.

11. heating using microwave cooking device according to claim 1, wherein,

This heating using microwave cooking device also possesses the mistake of the mistake use of judging described pallet and uses judging part,

Under the situation that the mistake of being used judgement section judges to go out described pallet by described mistake is used, described control part makes described directionality power supply rotation.

12. heating using microwave cooking device according to claim 11, wherein,

Described mistake uses judging part to have the switch of being pushed by described pallet when described pallet is assembled to heating clamber, and situation about not being pressed at described switch judges to not using this mistake of described pallet to use.

13. heating using microwave cooking device according to claim 11, wherein,

The temperature detecting part that described mistake uses judging part to have at least one side's who detects described pallet or described heating object temperature under the situation that detects the temperature different with predetermined temperature, is judged as and does not use this mistake of described pallet to use.

14. heating using microwave cooking device according to claim 11, wherein,

The weight detecting portion that described mistake uses judging part to have at least one side's who detects described pallet or described heating object weight under the situation of the weight that varies in weight that detects and be scheduled to, is judged as and does not use this mistake of described pallet to use.

Images