CN1178026C

CN1178026C - Heating cooking utensil

Info

Publication number: CN1178026C
Application number: CNB011179465A
Authority: CN
Inventors: 增田一郎; 博; 金井孝博
Original assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Priority date: 2000-12-12
Filing date: 2001-04-27
Publication date: 2004-12-01
Anticipated expiration: 2021-04-27
Also published as: KR100403032B1; CN1358960A; TW571056B; KR20020046132A; JP2002181334A

Abstract

The object of the present invention is to provide a heating cooker wherein heating is prevented from being insufficient or excess, and heating control with high accuracy, in response to the kind (water content) of an article to be cooked is made. The solution of the present invention is a heating cooker that is provided with a heating chamber 2, in which an article 11 to be cooked is contained, a magnetron 5 for irradiating the article 11 with high frequency, and an infrared sensor 10 for detecting the amount of infrared rays emitted from the article 11. The amount of change of the infrared rays within a previously set time interval by the infrared ray sensor 10 is evaluated, and the water content of the article 11 is evaluated on the basis of an evaluation result, and further cooking time of the article 11 is set, on the basis of an evaluation result.

Description

Heating device

The present invention relates to gratin is put into the heating device that heating clamber carries out cooking.

Fig. 9 and Figure 10 are the profilographs of the heating device that has earlier, and Fig. 9 is the figure that the state of rotating disk has been used in expression.Figure 10 is the figure that the state of shelf has been used in expression.In the drawings, the 1st, the body of heating device, 2 are provided in a side of the case shape heating clamber that there is peristome in body 1 interior the place ahead, and 3 are provided in a side of the shelf of heating clamber side wall centers portion, and dihedral cooking dish described later is dangled downwards.4 are provided in a side of a sidewall of heating clamber 2 and frequency electromagnetic waves are shone and give electricity mouthful in the heating clamber 2, the 5th, as the magnetron of the high-frequency heating device that produces frequency electromagnetic waves, the 6th, the frequency electromagnetic waves that magnetron 5 is produced leads to the waveguide of

electricity mouth

4,7 are provided in a side of the rotating disk of the bottom of heating clamber 2, utilize motor 8 to be rotated.9 are provided in a side of the sight vane of the side wall upper part of heating clamber 2, the 10th, infrared ray sensor, detect the infrared ray amount that the gratin 11 in the heating clamber 2 sends by

sight vane

9,12 are provided in a side of the baffle plate between infrared ray sensor 10 and the sight vane 9, baffle plate 12 opens sight vane 9 when flat, when heater heats sight vane 9 is closed.The 13rd, be placed on the circular cooking utensil that is used for adorning gratin 11 on the rotating

disk

7,14 heaters, 15 that are provided in a side of the top of heating clamber 2 are provided in a side of the heater of the bottom of heating clamber 2, use during the cooking of baking formula.The 16th, the dihedral cooking utensil that is folded down from the shelf 3 of heating clamber 2 for example, is used for adorning the semi-finished product of gratin 11 such as cake during the cooking of baking formula.The 100th, weight tester detects the weight of the gratin 11 in the circular cooking utensil 13 be placed on the rotating disk 7.The 101st, drive the control device of controlling magnetron 5, motor 8, baffle plate 12 and upper heater 14, following heater 15.

Control device 101 utilizes weight tester 100 to detect the weight that is provided in the gratin 11 on the rotating disk 7, sets the cooking time corresponding with the weight of gratin 11 according to this testing result.And, when the cooking stove formula is cooked, in the cooking time of setting, drive 5 pairs of gratins of magnetron, 11 irradiation frequency electromagnetic waves.In addition, cooking stove formula when cooking, not only detect the cooking time, also utilize infrared ray sensor 10 to detect the infrared ray amount of sending from gratin 11, be controlled to and when this detected value surpasses predefined infrared ray amount, just stop the cooking.During the cooking of baking formula, in the cooking time of setting, driving upper heater 12, following heater 13 are cooked.Have again, as shown in figure 10, when on the shelf 3 at heating clamber 2 dihedral cooking utensil 16 being set and cooking, no matter be the cooking of cooking stove formula or the cooking of baking formula, all be not to use the person to utilize hand timer (not shown) to set the cooking time arbitrarily, control according to this cooking time.

Gratin has various as the composition (moisture, protein, starch etc.) of this material for cooking, influence the length of cooking time especially as the content (moisture content) of its main component moisture.Promptly, when the cooking stove formula is cooked, the raw material cooking time of the washiness (moisture content is big) that the object Miso Soup is such is long, its cooking time ratio Miso Soup of the rice of the moisture few (moisture content is moderate) of contrast Miso Soup is short, and still less its cooking time of raw material of (moisture content is little) must be shorter for the such moisture of object hamburger.In addition, when the baking formula is cooked, also be necessary to washiness (moisture content is big) gratin, moisture than this gratin lack the cake of (moisture content is moderate) and moisture still less the cooky of (moisture content is little) change the cooking time.In contrast, in the heating device that formerly has, only utilize weight tester to detect the weight of gratin and do not consider the moisture (moisture content) of gratin, set the cooking time according to sense weight standardizedly, so, underheat occurs or heat excessive phenomenon, can not carry out the cooking corresponding with the kind of gratin.In addition, when the stage casing at heating clamber sets gratin, operating weight detector and must be not with manually setting the cooking time.

The present invention proposes in order to address the above problem, and its purpose is to provide a kind of heating device, can add thermal control according to the kind (moisture content) of gratin.

Heating device of the present invention has the heating clamber of placing gratin, to the high-frequency electromagnetic wave generating device of above-mentioned gratin irradiation frequency electromagnetic waves with detect the infra-red ray detection device of the infrared ray amount of sending from above-mentioned gratin, utilize above-mentioned infra-red ray detection device to calculate interior ultrared variable quantity of predefined time, calculate the moisture content that the result calculates above-mentioned gratin according to this, set the cooking time of above-mentioned gratin according to the above-mentioned result of calculating.

In addition, has the heating clamber of placing gratin, high-frequency electromagnetic wave generating device to above-mentioned gratin irradiation frequency electromagnetic waves, the infra-red ray detection device of the infrared ray amount that detection is sent from above-mentioned gratin and control the control device of above-mentioned high-frequency electromagnetic wave generating device according to the output valve of above-mentioned infra-red ray detection device, above-mentioned control device utilizes above-mentioned infra-red ray detection device to calculate from beginning to shine the ultrared variable quantity of frequency electromagnetic waves till the predefined time, calculate the moisture content that the result calculates above-mentioned gratin according to this, set the cooking time again after gratin judged, control above-mentioned high-frequency electromagnetic wave generating device according to the above-mentioned cooking time.

In addition, has the heating clamber of placing gratin, the high-frequency electromagnetic wave generating device that utilizes frequency electromagnetic waves that above-mentioned gratin is heated, the heater that utilizes heater that above-mentioned gratin is heated, the infra-red ray detection device of the infrared ray amount that detection is sent from above-mentioned gratin and control the control device of above-mentioned heater according to the output valve of above-mentioned infra-red ray detection device, above-mentioned control device drives above-mentioned high-frequency electromagnetic wave heater and utilizes above-mentioned infra-red ray detection device to calculate from beginning to shine the ultrared variable quantity of frequency electromagnetic waves till the predefined time, calculate the moisture content that the result calculates above-mentioned gratin according to this, set the cooking time again after gratin judged, control above-mentioned heater according to the above-mentioned cooking time.

Fig. 1 is the profilograph of the heating device of expression the invention process form 1.

Fig. 2 is the profilograph of the heating device of expression the invention process form 1.

Fig. 3 is the front elevation of this heating device.

Fig. 4 is the controlling party block diagram of this heating device.

Fig. 5 is the flow chart of the action of this heating device of expression.

Fig. 6 is the flow chart of the action of this heating device of expression.

Fig. 7 is the figure of expression infrared ray amount (electromotive force) and the relation of heat time heating time.

Fig. 8 is the moisture content and the gratin determinating reference of expression gratin and cooks the figure of the relation of time set calculating formula.

Fig. 9 is a profilograph of representing the heating device that has earlier.

Figure 10 is a profilograph of representing the heating device that has earlier.

Example 1

Below, use Fig. 1 example 1 of the present invention to be described to Fig. 8.

Fig. 1 and Fig. 2 are the profilographs of the heating device of expression the invention process form 1, and Fig. 1 is illustrated in the figure of the cooking status on the rotating disk, and Fig. 2 is illustrated in the figure of the cooking status on the cooking utensil of being supported by shelf.Fig. 3 is the front elevation of heating device, and Fig. 4 is its controlling party block diagram, and Fig. 5 and Fig. 6 are the flow charts of expression action, and Fig. 7 is the figure of expression infrared ray amount (electromotive force) and the relation of heat time heating time.Fig. 8 is the moisture content and the gratin determinating reference of expression gratin and cooks the figure of the relation of time set calculating formula.

Among the figure, the 1st, the body of heating device, 2 are provided in a side of the case shape heating clamber that there is peristome in body 1 interior the place ahead, and 3 are provided in a side of the shelf of the side wall centers portion of heating clamber 2, and dihedral cooking utensil described later dangles downwards.4 are provided in a side of a sidewall of heating clamber 2 and frequency electromagnetic waves are shone and give electricity mouthful in the heating clamber 2,4a is provided in a side of the going up of top of heating clamber 2 and gives the electricity mouth, 4b is provided in a side of the following electricity mouth of giving of the bottom of heating clamber 2, the 5th, as the magnetron of the high-frequency heating device that produces frequency electromagnetic waves, the 6th, the frequency electromagnetic waves that magnetron 5 is produced leads to the waveguide of

electricity mouth

sight vane

disk

7,14 upper heaters, 15 that are provided in a side of the top of heating clamber 2 are provided in a side of the following heater of the bottom of heating clamber 2, use when cooking for the baking formula.The 16th, the dihedral cooking utensil that is folded down from the shelf 3 of heating clamber 2 for example, is used for adorning the semi-finished product of gratin 11 such as cake during the cooking of baking formula.

The 17th, the door that the peristome of heating clamber 2 is opened and closed, the 18th, with the operating portion of door 17 adjacent settings.The display of menu and cooking time etc. is cooked in the demonstration that 18a is provided in a side of on the

operating portion

18,18b selects frequency electromagnetic waves cooking stove heated key, 18c is a baking key of selecting the heater heating, 18d is the beginning key that begins to cook, 18e is the cancel key of cancellation by the function of settings such as cooking stove key 18b or baking part key 8c, and 18f is a Menu key of setting cooking menus such as Miso Soup, rice and cake.19 are provided in a side of the control device in the body 1, are made of microcomputer etc.

Control device 19 has memory, temporarily store by the infrared ray sensor 10 detected infrared ray amounts of sending from gratin 11, storage simultaneously be used for judging gratin 11 kind regulation infrared ray variable quantity (electromotive force) and be used for setting the computing formula of the cooking time corresponding with the moisture content of gratin, also iatron 18A content displayed and cooking menu etc., control device 19 are control magnetron 5, motor 8, infrared ray sensor 10, baffle plate 12, upper heater 14, the device of heater 15 and display 18a down.And, control device 19 according to calculate from the signal of infrared ray sensor 10 stipulated time, promptly from begin to shine till frequency electromagnetic waves to the 1 minute during the infrared ray variable quantity, thereby and compare the moisture content of judging gratin with predefined value.Then, calculated afterwards again through behind the official hour, promptly from beginning to shine the infrared ray variable quantity till frequency electromagnetic waves to the 2 minutes, and calculate the cooking time corresponding with the gratin of setting (moisture content).

Next uses Fig. 5 to Fig. 8 its action to be described.

At first, the situation of using rotating disk 7 to cook is described.After gratin 11 is put into heating clamber 2, close door 17.Then, the key of operating operation portion 18 (S1).The key operation signal input control device 19 of operating portion 18.Then, whether judge cooking stove key 18b (S2), if cooking stove key 18b then waits for the operation (S3) of beginning key 18d, when having operated beginning key 18d, to the signal of magnetron 5 output cooking beginnings.

Next, control device 19 sends to infrared ray sensor 10 and detects ultrared instruction.Infrared ray sensor 10 detects the infrared ray amount A that sends from the surface of gratin 11 when the cooking begins, and this signal is exported to control device 19.Control device 19 temporarily is stored in (S4) among the memory 19a after this infrared ray amount A is transformed into electromotive force (0.2V).In addition, the timing (S5) of the control device 19 predefined minute t of beginning (for example 30 seconds).Then, drive motors 8 (S6) makes the rotating disk rotation.Control device 19 detects the electric current that flows through motor 8, judges whether motor 8 is driven (S7).If judge that motor 8 has been driven, then used rotating disk 7 to heat (S8) as can be known.Then, from the displaying contents of memory 19a storage, access " rotating disk cooking stove " back and show (S9) at display 18a.

On the other hand, if judge that in S7 motor 8 is not driven, then control device 19 knows it is shelf heating (S10).Then, from the displaying contents of memory 19a storage, access " shelf cooking stove " back and show (S11) at display 18a.

No matter be the rotating disk cooking or utilize shelf to cook that control device 19 all drives magnetron 5 up to through minute t (S12).After magnetron 5 produces the frequency electromagnetic waves concussion, frequency electromagnetic waves through waveguide 6 from giving electric 4a or giving electricity mouthful 4b down to gratin 11 irradiations.Utilize frequency electromagnetic waves heating that gratin 11 is heated to inside from the top layer, gratin 11 temperature rise, and send more infrared ray during than cooking beginning.

Control device 19 whether judge through half of minute t, be minute t/2 (for example 15 seconds) (S13), if judge and passed through t/2 (15 seconds), then send the instruction of the infrared ray amount that detects gratin 11 to infrared ray sensor 10.10 detection assay time of infrared ray sensor t/2 sends infrared ray amount B and exports to control device 19 (S14) through gratin 11 later.Control device 19 is transformed into electromotive force (for example 0.5V) with this infrared ray amount B, calculates infrared ray (electromotive force) variable quantity H=B-A according to the electromotive force (0.2V) that temporarily is stored in the cooking among the memory 19a infrared ray amount A when beginning in S4.

Control device 19 is judged gratin according to the variable quantity H that has calculated on the basis of corresponding predefined infrared ray variable quantity with gratin.The variable quantity of predefined infrared ray (electromotive force) is corresponding with moisture content, for example, the situation of washiness P, the moderate Q of moisture, the few R of moisture is set (with reference to Fig. 8) respectively.At first, judge beginning H=P not (S16), if otherwise judge H=Q not (S17), if otherwise judge H=R not, if otherwise return S16 and repeat this action (S18).Then, if H=P then judges the gratin washiness, H=Q moisture is moderate, and H=R moisture is few.For example, the variable quantity of the electromotive force of calculating in S15 is 0.3V, so H=P is judged according to Fig. 8 in 0≤H＜1, can judge that gratin 11 is washy gratin (S19).

The frequency electromagnetic waves that is produced by magnetron 5 after S19 judges gratin also continues to shine gratin 11.And control device 19 judges whether passed through minute t (for example 30 seconds) (S20), if minute T has been passed through in judgement, then sends the instruction of the infrared ray amount that detects gratin 11 to infrared ray sensor 10.10 detection assay time of infrared ray sensor t through sending from gratin 11 later infrared ray amount C and export to control device 19 (S21).Control device 19 is transformed into electromotive force (for example 1.0V) with detected infrared ray amount C, calculates infrared ray (electromotive force) variable quantity J=C-A (S22) according to the electromotive force (0.2V) that temporarily is stored in the cooking among the memory 19a infrared ray amount A when beginning in S4.

Control device 19 is the cooking of cooking stove formula because of judging in S2, in S19, judge washy gratin, so from be stored in memory 19a the computing formula used of the corresponding cooking time set of gratin in access the computing formula T=150-60J of washiness (moisture content is big), and calculate and set cooking time T according to the electromotive force variable quantity J (0.8V) that calculates among the S22.For example, cooking time T=150-60J=150-60 * 0.8=102 second (S23).When setting cooking time T=102 second, just begin to cook the counting (S24) of time T.Carry out the frequency electromagnetic waves cooking, and judge whether process is cooked time T (S25).If judge process cooking time T, then stop the action of motor 8 and magnetron 5, eliminate the demonstration of display 18a, finish the cooking of cooking stove formula.

In addition, when the electromotive force variable quantity (infrared ray variable quantity) of gratin 11 when H is H=Q in S17, in the cooking stove formula cooking shown in Figure 8, access the cooking time set computing formula (T=230-50J) of the moderate gratin of moisture content, when H=R, access the cooking time set computing formula (T=500-60J) of the gratin of moisture few (moisture content is few), and in S22, set the cooking time.

In addition, when judgement was not cooking stove key 18b in S2, control device 19 judged whether toast key 18c (S26), if not baking key 18c then returns S2, carried out S2 repeatedly till having operated cooking stove key 18d or baking key 18c.And, if baking key 18c then waits for the operation that begins key 18d, judge whether begin key 18d (S27), if beginning key 18d, the then signal that begins to the magnetron 5 output cookings.Next, control device 19 sends to infrared ray sensor 10 and detects ultrared instruction.Infrared ray sensor 10 detects the infrared ray amount A that sends from gratin 11 when cooking beginning, and this signal is exported to control device 19.Control device 19 temporarily is stored in (S28) among the memory 19a after this infrared ray amount A is transformed into electromotive force (0.2V).In addition, begin the timing (S29) of predefined the 2nd minute t (for example 30 seconds).Then, drive motors 8 (S30) makes rotating disk 7 rotations.

The same with the cooking of cooking stove formula, control device 19 detects the electric current that flows through motor 8, judges whether motor 8 is driven (S31).If judge that motor 8 has been driven, then used rotating disk 7 to heat (S32) as can be known.Then, from the displaying contents of memory 19a storage, access " rotating disk cooking stove " back and show (S33) at display 18a.

On the other hand, if judge that in S31 motor 8 is not driven, then control device 19 knows it is shelf heating (S34).Then, from the displaying contents of memory 19a storage, access " shelf cooking stove " back and show (S35) at display 18a.

No matter be the rotating disk cooking or utilize shelf to cook that control device 19 all drives magnetron 5 up to through minute t (S36).After magnetron 5 generation frequency electromagnetic waves concussions, frequency electromagnetic waves shines from giving electricity mouth 4a or the following gratin 11 of electricity mouthful 4b in heating clamber 2 of giving through waveguide 6.Control device 19 whether judge through half of minute t, be minute t/2 (for example 15 seconds) (S37), if judge and passed through t/2, then send the instruction of the infrared ray amount that detects gratin 11 to infrared ray sensor 10.The infrared ray amount B that 10 detection assay time of infrared ray sensor t/2 warp gratin 11 later sends also exports to control device 19 (S38).Control device 19 is transformed into electromotive force (for example 0.6V) with this infrared ray amount B, calculates infrared ray (electromotive force) variable quantity H=B-A (S39) according to the electromotive force (0.2V) that temporarily is stored in the cooking among the memory 19a infrared ray amount A when beginning in S28.

Control device 19 is judged gratin according to the variable quantity H that has calculated on the basis of corresponding predefined infrared ray variable quantity with gratin (electromotive force variable quantity).The variable quantity of predefined infrared ray (electromotive force) is corresponding with moisture content, for example, the situation of washiness P, the moderate Q of moisture, the few R of moisture is set (with reference to Fig. 8) respectively.At first, judge beginning H=P not (S40), if otherwise judge H=Q not (S41), if otherwise judge H=R not, if otherwise return S40 and repeat this action (S42).Then, if H=P then judges the gratin washiness, H=Q moisture is moderate, and H=R moisture is few.For example, the variable quantity of the electromotive force of calculating in S38 is 0.4V, so H=P is judged according to Fig. 8 in 0≤H＜1, can judge that gratin 11 is washy gratin (S43).

Judge that in S43 the frequency electromagnetic waves that is produced by magnetron 5 after the gratin also continues to shine gratin 11.And control device 19 judges whether passed through minute t (for example 30 seconds) (S44), if judge and passed through minute T, then sends to infrared ray sensor 10 and detects infrared ray amount C that gratin 11 sends and the instruction (S45) of exporting to control device 19.Control device 19 is transformed into electromotive force (for example 1.2V) with detected infrared ray amount C, simultaneously, stops to drive magnetron 5 (S46).In addition, drive the sight vane 9 (S47) that baffle plate 12 is closed heating clamber 2 simultaneously.Secondly, calculate infrared ray (electromotive force) variable quantity J=C-A (S48) according to the electromotive force (1.2V) of detected infrared ray amount C and the electromotive force (for example 0.2V) that in S27, temporarily is stored in the cooking among the memory 19a infrared ray amount A of gratin 11 when beginning.For example calculating variable quantity J is 1.2V-0.2V=1.0V.

Control device 19 accesses the computing formula T=1200-120J that the cooking time set of the washy gratin in the baking formula shown in Figure 8 cooking is used, and calculates and set cooking time T according to the electromotive force variable quantity J that calculates among the S48.For example, T=1200-120J=1200-120 * 1=1080 second (S49).Then make upper heater 14 and following heater 14 interactive actions (S50, S51).For example make repeatedly 13 ON20 seconds of upper heater again OFF, make down the heater 15 ON15 second of the actions of OFF again.

When having set cooking time T, just begin to cook the counting (S52) of time T.Then carry out the cooking of upper heater 14 and following heater 15, and judge whether process is cooked time T (S53).If judge process cooking time T, then control device 19 stops drive motors 8, upper heater 14 and following heater 15, eliminates the demonstration of display 18a, finishes the cooking of baking formula.

In addition, when the electromotive force variable quantity (infrared ray variable quantity) of gratin 11 when H is H=Q in S41, access the time set computing formula (T=2400-100J) of the moderate gratin of the baking formula cooking shown in Figure 8 and moisture content, when H=R, access the time set computing formula (T=1400-80J) of the gratin of the cooking of baking formula and moisture few (moisture content is few), and in S47, set cooking time T.

Have again, in the cooking of cooking stove formula, also can not only add thermal control according to the cooking time T of setting, and as before, when the duration and degree of heating of using infrared ray sensor to detect gratin then, promptly when the surface temperature of gratin arrives desired temperature, the constipation bundle is cooked.

As mentioned above, in example 1, utilize magnetron 5 that frequency electromagnetic waves is shone on the gratin 11, calculate when beginning to shine the infrared ray variable quantity till the predefined minute t/2, calculate the moisture content of gratin according to this result, and then calculate from the irradiation frequency electromagnetic waves and begin infrared ray variable quantity to minute t, set the cooking time according to this result with the moisture content of calculating, so, can carry out the heating corresponding, improve the precision (crudy) of cooking with gratin.

In addition, in example 1, because of utilizing infrared ray sensor to set the cooking time by the operating weight detector, so, even when utilizing the shelf of heating clamber middle body to cook gratin, can send also that ultrared variable quantity is corresponding sets the cooking time with gratin, can carry out the heating corresponding with gratin.In addition, because of operating weight detector not, so can reduce cost.

Have, in example 1, detected the infrared ray amount of sending from gratin when beginning is shone frequency electromagnetic waves by magnetron 5, cooking beginning is preceding, irradiation frequency electromagnetic waves infrared ray amount before but also can detect.

In addition, though be to calculate the cooking time from the ultrared variable quantity that gratin sends according to when beginning cooking with through minute t (for example 30 seconds) back, but also the minute t/2 (for example 15 seconds) that judges gratin temporarily can be stored among the storage device 19c through out-of-date infrared ray amount B, calculate the infrared ray variable quantity according to the infrared ray amount C after this infrared ray amount B and the minute t warp again and calculate the cooking time again.

And then, in example 1, though be to calculate the cooking time with control device 19, but can in memory 19a, store a plurality of cooking times corresponding in advance with the infrared ray variable quantity, comparing judgement with the infrared ray variable quantity of gratin selected afterwards, also can make ultrared amount once, calculate the cooking time according to it again with moisture content or weight change.

Have again, also can be before the beginning key 18d of S3 shown in Figure 5 and S27 shown in Figure 6 operation dishes singly-bound, import washiness again, moisture is moderate and moisture any one in few.

In addition, in example 1, the gratin of only distinguishing washiness, moisture is moderate and moisture the is few 3 kinds of cookings is judged and cooking time set computing formula though stored in memory 19a, but, then can further improve the judgement and the precision of cooking time of gratin if they are stored by multiple cooking kind.

If according to the present invention, utilize the high-frequency electromagnetic wave generating device to shine frequency electromagnetic waves to gratin, utilize infra-red ray detection device to calculate interior infrared ray variable quantity of predefined time, calculate the moisture content that the result calculates gratin according to this, calculate the cooking time that the result sets gratin according to this, so, can carry out the cooking corresponding with gratin, have the effect that underheat of preventing and heating too much waited and improved cooking precision.In addition,, also can utilize infra-red ray detection device to set the cooking time even for example use the shelf of heating clamber middle body to cook, so, the precision of cooking time improved.

Claims

1. a heating device is characterized in that: have

The heating clamber of placement gratin,

To the high-frequency electromagnetic wave generating device of above-mentioned gratin irradiation frequency electromagnetic waves,

The infra-red ray detection device of the infrared ray amount that detection is sent from above-mentioned gratin,

According to the testing result of this infra-red ray detection device, calculate the ultrared variable quantity in the predefined stipulated time, calculate the moisture content that the result judges above-mentioned gratin according to this, set the control device of the cooking time corresponding with above-mentioned moisture content.

In the claim 1 record heating device, it is characterized in that:

Above-mentioned control device is calculated from beginning to shine the ultrared variable quantity of frequency electromagnetic waves till the afore mentioned rules time, controls above-mentioned high-frequency electromagnetic wave generating device according to the above-mentioned cooking time that sets.

In the claim 1 record heating device, it is characterized in that:

Also have the heater that above-mentioned gratin is heated,

Above-mentioned control device drives above-mentioned high-frequency electromagnetic wave generating device, and calculates from beginning to shine the ultrared variable quantity of frequency electromagnetic waves till the afore mentioned rules time, controls the driving of above-mentioned heater according to the above-mentioned cooking time that sets.