CN102538037A - Heating cooker - Google Patents
Heating cooker Download PDFInfo
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- CN102538037A CN102538037A CN2011104323855A CN201110432385A CN102538037A CN 102538037 A CN102538037 A CN 102538037A CN 2011104323855 A CN2011104323855 A CN 2011104323855A CN 201110432385 A CN201110432385 A CN 201110432385A CN 102538037 A CN102538037 A CN 102538037A
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Abstract
The invention provides a heating cooker which can prevent overheating even if the load is in a small amount. The heating cooker comprises a microwave-generating unit (1), a heating chamber (2), an infrared sensor (3) which non-contactably detects load temperature, a movable part (4) which enables the infrared sensor (3) to move and change the temperature detecting position of the heating chamber (2), a control unit (5) which controls the microwave-generating unit (1) based on temperature and position information detected by the infrared sensor (3), and a load amount determining unit (6) which determines the load amount in the heating chamber (2). When the load amount determining unit (6) determines that the load amount is small, the control unit (5) detects the highest temperature, and the movable part (4) is movable within a range between a position when load amount determining unit (6) determines that the load amount is large and a position when the temperature reaches to the highest point. Accordingly, overheating can be prevented even if a small amount of load is heated.
Description
Technical field
The present invention relates to the heating device of use in general family, dining room and office etc.
Background technology
In the past; Example as this heating device; Following method is disclosed in patent documentation 1: make infrared ray sensor movably measure temperature for the temperature of measuring a plurality of positions in the heating clamber; Thus, no matter be great load and no matter be placed in which position, can both heat with appropriate temperature.
[patent documentation 1] TOHKEMY 2002-168457 communique
But, in above-mentioned existing structure, be to make temperature sensor movably change the detection position, so can only measure the temperature of same detection position discretely.Under these circumstances, have following problem: when a spot of load was heated, during other position of mensuration, load can be heated to more than the target temperature.
Summary of the invention
The present invention makes in order to solve above-mentioned existing problem, even its objective is a kind of heating device that also can under the situation that heating did not take place, stop to heat that a spot of load is heated is provided.
In order to solve above-mentioned existing problem, heating device of the present invention has: the microwave generation unit; Take in the heating clamber of the load that heats with microwave; Measure the infrared ray sensor of load temperature non-contactly; Make infrared ray sensor movably change the movable part of the temperature measuring position in the heating clamber; Control the control module of microwave generation unit according to infrared ray sensor temperature of measuring and the information that locates; And the load identifying unit of the load in the judgement heating clamber.
In this structure; When the load identifying unit judges that load is a small amount of; Control module detects the maximum temperature of the temperature measured, and the scope of movable part when judging that than load identifying unit load is volume is little and comprise in the scope of the position that detects maximum temperature movable.
Even heating device of the present invention heats a spot of load, also can under the situation that heating did not take place, stop heating, can make the processability of heating good.
Description of drawings
Fig. 1 is the profile of the heating device in the embodiment of the present invention.
Fig. 2 show the infrared ray sensor of the heating device in the embodiment of the present invention movable range, load and with the corresponding movable range of the load of infrared ray sensor.
Fig. 3 shows the difference of the variations in temperature that causes because of load of heating device in the embodiment of the present invention.
Fig. 4 shows the microwave output of the heating device in the embodiment of the present invention.
Fig. 5 shows the Temperature Distribution in the heating clamber of load and the heating device in the embodiment of the present invention in the heating clamber of the heating device in the embodiment of the present invention.
Symbol description
1 microwave generation unit
2 heating clambers
3 infrared ray sensors
4 movable parts
5 control modules
6 load identifying units
7 humidity sensors
8 exhaust outlets
9a, 9b weight sensor
The specific embodiment
The 1st mode is following such heating device, and this heating device has: the microwave generation unit; Take in the heating clamber of the load that heats with microwave; Measure the infrared ray sensor of load temperature non-contactly; Make above-mentioned infrared ray sensor movably change the movable part of the temperature measuring position in the above-mentioned heating clamber; Control the control module of above-mentioned microwave generation unit according to above-mentioned infrared ray sensor temperature of measuring and the information that locates; And the load identifying unit of judging the load in the above-mentioned heating clamber; Wherein, When above-mentioned load identifying unit judged that load is a small amount of, above-mentioned control module detected the maximum temperature of the temperature of being measured, and above-mentioned movable part makes in following scope movable: the scope when this scope judges that than above-mentioned load identifying unit load is volume is little and comprise the position that is measured to maximum temperature; Thus, can shorten temperature detection and prevent heating at interval.
In the 2nd mode, particularly, the movable part of the 1st mode is measured to the position of maximum temperature with the temperature measuring fixed-site in infrared ray sensor, and temperature detection is minimized at interval, thereby can prevent the heating of crossing of a small amount of load.
In the 3rd mode; Particularly; In the 1st mode, also has the humidity sensor of measuring the vapor volume in the heating clamber; The load identifying unit comes the detection load amount according to the output that control module has driven the above-mentioned humidity sensor after the microwave generation unit stipulated time, thus detection load amount apace.
In the 4th mode, particularly, the load identifying unit of the 1st mode comes the detection load amount according to the variation of temperature rate that infrared ray sensor is measured, thus detection load amount exactly.
In the 5th mode, particularly, the load identifying unit of the 1st mode is judged load through the weight of detection load, can directly detect load thus.
In the 6th mode, particularly, the control module of the 1st mode can prevent heating thus more reliably in the output of the front and back change microwave generation unit of load identifying unit judgement load.
In the 7th mode, particularly, judge that at the load identifying unit of the 1st mode load is under a spot of situation, control module reduces the output of microwave generation unit, can prevent heating thus.
In the 8th mode, particularly, after the movable part of the 1st mode had changed the movable range of infrared ray sensor, control module improved the output of microwave generation unit, can be heated to target temperature quickly thus.
Below, with reference to accompanying drawing embodiment of the present invention is described.In addition, the present invention does not receive the qualification of this embodiment.
Fig. 1 shows the profile of the heating device in the embodiment of the present invention.The heating device of this embodiment possesses: the microwave generation unit 1 that produces microwave; Take in the heating clamber 2 of the load that heats with microwave; Measure the infrared ray sensor 3 of load temperature non-contactly; Make infrared ray sensor 3 movably change the movable part 4 of the temperature measuring position in the heating clamber 2; Control the control module 5 of microwave generation unit 1 according to infrared ray sensor 3 temperature of measuring and the information that locates; And the load identifying unit 6 of judging the load in the heating clamber 2.
Usually, microwave generation unit 1 uses magnetron mostly, but also can be semiconductor-type etc.Microwave generation unit 1 is according to the indication from control module 5, and never illustrated inverter circuit etc. provides electric power, produces microwave thus.The frequency of the microwave that is produced is 2450MHz normally, but is not limited thereto.
Microwave imports in the heating clamber 2 via antenna, and adopts following structure etc. sometimes: with antenna fix, the load mode of rotation the structure of turntable is set; Load is carried the structure that places same position and make the antenna rotation.
Though in heating clamber 2, have microwave, perfect condition is only load to be carried out heating using microwave.Therefore, under the situation that heating clamber 2 for example is made up of glass etc., glass can generate heat because of microwave, thereby produces loss on heating.
Therefore, in order to reduce loss on heating, the preferred metal that does not generate heat and microwave is reflected that adopts because of microwave.But, because need and to import in the heating clamber 2 from the microwave that microwave generation unit 1 produces, change to other material so only will be used to import the part of microwave usually.
For thermoelectric pile, also there is such thermoelectric pile especially: in an encapsulation, have a plurality of elements, and can detect the temperature of each element diverse location.Usually in such element, be the temperature of taking out and utilize each element successively mostly, but be not limited thereto.
In addition, in order to position, also can use rotary encoder.In addition, movable part 4 can make infrared ray sensor 3 movable with the one dimension mode, also can make infrared ray sensor 3 movable with two-dimensional approach.
Below, to as above action, the effect of the heating device of formation describe.
The user opens not shown door, contains at heating clamber 2 and puts load.In Fig. 1, the antenna that the microwave that microwave generation unit 1 produces is rotated imports in the heating clamber 2.Because antenna rotates, so distributing, the microwave in the heating clamber 2 constantly changes, no matter will load and carry which position of putting in the heating clamber 2, can both heat.Therefore, for the heating device of this structure, the user can be carried any position of putting in the heating clamber 2 with load.
On the other hand, as stated, also can the rotation of loading fixed and made to antenna.In the case, there is the turntable that is used to make the load rotation, puts on the turntable so the user needs to load to carry.
The user is through not shown operating portion decision heating means.Usually under the situation of such heating device, can select several heating means such as heating using microwave, light heater heating, insulating box heating.
In this embodiment, situation about heating with microwave is described.In addition, as heating mode, exist by the user and set the manual mode that output and time heats and only select cooking content and the automatic mode that stops automatically heating etc.The user can select these patterns and with door close begin the heating.
After beginning heating, control module 5 makes infrared ray sensor 3 movable through movable part 4, the temperature that infrared ray sensor 3 is measured in the heating clamber 2, and control module 5 is accepted its temperature information and is changed the control content.
As the control content, for example, under the situation of the mode of having selected to carry out automatically the beverage heating, continue to be heated to and reach the temperature that sets, when reaching the temperature that sets, stop the work of microwave generation unit 1 and finish heating.Fig. 2 (A) is the figure of movable range that the infrared ray sensor of the heating device in the present invention's the 1st embodiment is shown; Fig. 2 (B) is the figure that the load of the heating device in the present invention's the 1st embodiment is shown, and Fig. 2 (C) is infrared ray sensor and the figure corresponding movable range of load that the heating device in the present invention's the 1st embodiment is shown.
Be received to which position in the heating clamber 2 because do not know to load, so shown in Fig. 2 (A), movable part 4 is so that infrared ray sensor 3 can be measured to the mode of the whole positions in the heating clamber 2, and is movable in the scope of a1～d1.
But,, only can measure the temperature of same detection position because be to make infrared ray sensor 3 movably change the detection position in this wise discretely.For example, when temperature was measured in the position of infrared ray sensor 3 a1 in Fig. 2 (A), infrared ray sensor 3 changed successively under the effect of movable part 4 and locates, and also the position of b1, c1, d1 is measured.Then, movable part 4 makes infrared ray sensor 3 movable in the other direction, and according to the order sequentially determining temperature of d1, c1, b1, also carries out temperature measuring to the position of a1 then.
That is, for the end in the such storehouse of a1, d1, when if infrared ray sensor 3 when the movable time that spends of the scope of a1～d1 is t, only can be with the time interval determination temperature of 2t roughly.On the other hand, the central authorities in the storehouse can be so that roughly the time interval of t is measured.
No matter be which kind of mode, all can only obtain the temperature information of same position with the interval more than the time t.Therefore have such problem: during the time t～2t that measures other position, load temperature can be heated to more than the target temperature.Especially under the situation of a small amount of load, it is very fast to heat up, so that its overshoot also becomes is big.
The purpose of embodiment of the present invention is, even a kind of heating device that also can under the situation that heating did not take place, stop to heat that a small amount of load is heated is provided.
In embodiments of the present invention, utilize load identifying unit 6 detection load amounts, shorten the interval that infrared ray sensor 3 is measured, prevented heating thus.Specifically, load for the situation shown in Fig. 2 (B) under, infrared ray sensor 3 as long as as Fig. 2 (C) only in the scope of b1～c1 movably.
In other words, can save the temperature detection and the movable time of the scope of a1～b1, c1～d1.Thus, can shorten measuring interval and fast detecting and whether reach target temperature, so can reduce overshoot to load.Therefore, can stop heating, bring facility to the user at temperature place near target temperature.
Here, the detection method to load describes.Fig. 3 is the figure of difference that the variations in temperature that causes because of load of heating device in the present invention's the 1st embodiment is shown.The method of detection load amount roughly is divided into 3 kinds.
At first, the 1st kind of method is the method for judging according to rate of temperature change.As shown in Figure 3; With the microwave of equal-wattage to the different load (heating object) of identical type, amount volume when heating; About being heated to the required time of temperature FT2,, relative therewith for this time under a spot of situation is Ta from temperature FT1; For this time under the situation of volume is Tb, and Ta＜Tb.
And the relation of Ta and Tb is basic and its load is proportional.Therefore, be under the situation more than the set point of temperature through the load temperature after certain stipulated time, load identifying unit 6 detects to being a spot of load.
Here, make under the movable situation of infrared ray sensor 3, can not the stipulated time be set at the movable required time below, even but need be set at the time (for example, 15 seconds) that heating can not take place a spot of load yet.
In addition, judge that required set point of temperature is the temperature that took place before the heating, be preferably below the target temperature of heating, but optimum temperature is different with load, so for example be set at 50 ℃ etc.
In addition, under the big situation of microwave output, it is big that the slope of Fig. 3 becomes, so can before load identifying unit 6 is judged load, reduce the output of microwave, from judging the output that finishes to increase microwave, can further prevent heating thus.
In addition, the microwave output after judgement finishes can be changed according to load.Fig. 4 shows the microwave output of the heating device in the present invention's the 1st embodiment.Locate at the time T c that begins from heating (for example, 15 seconds), load identifying unit 6 is judged load.
At this moment, the microwave that ends in time T c is output as O2.This microwave output O2 is set to: even a spot of load heating can not take place at time T c place yet.When time of advent during Tc, load identifying unit 6 is judged load according to the temperature information of infrared ray sensor 3.
That is, if temperature is more than the set point of temperature, then being judged to be is a spot of load, if be lower than set point of temperature, then being judged to be is the load of volume.Benchmark about judging also can change more carefully.
When determining load in this wise, its result of determination sends to control module 5 from load identifying unit 6, and control module 5 can be according to the output of this load change microwave.Specifically, be under the situation of volume in load, microwave output is brought up to O3 from O2, thus, even the load of volume also can be realized heating at short notice.On the other hand, under the situation that is a small amount of load, heating possibly take place, so microwave output is reduced to O1 from O2, be difficult to take place heating thus.
Such microwave output change is to heat in order under the situation of a small amount of load, further to be difficult to take place, but also nonessentially carries out such change.
Then, the method that the 2nd kind of load is detected describes.The steam that humidity sensor 7 detections shown in Figure 1 are produced by load etc.In the time of in humidity sensor 7 is arranged on heating clamber 2, there is the problem of stable on heating problem and generation noise, so humidity sensor 7 is arranged in the exhaust outlet 8.For humidity sensor 7, relative humidity sensor and absolute humidity sensor are arranged, which kind of no matter uses can.
When load was heated, the moisture that contains in the load was heated to be steam and discharges.The vapor volume that discharges depends on load.Therefore, can be after a little while at humidity sensor 7 detected vapor volumes, load identifying unit 6 is judged load for a small amount of, at vapor volume for a long time, load identifying unit 6 judges that load is volume.As the opportunity of judging, can consider from heating through after the certain hour or infrared ray sensor 3 detected temperature reach set point of temperature afterwards etc., but be not limited thereto.
Then, the method that the 3rd kind of load is detected describes.Load identifying unit 6 is provided with weight sensor 9a, 9b carrying the bottom of carrying the portion of putting put load, and detects and carries the weight of putting portion and load.The example that is provided with 2 weight sensor 9a, 9b has been shown in this embodiment, but the quantity of weight sensor being not limited thereto, also can be more than 1 or 3.In the weight data of measuring in this wise, comprise and carry the portion of putting and place the weight as the vessel of the food of load etc., the weighing load accurately of therefore can not saying so.
But the weight of carrying the portion of putting is fixed, so can it be deducted, and for the weight of vessel, can register in advance, can calculate the weight of the food oneself of hoping originally to heat thus exactly.In addition,, can suppose that also the certain proportion in the weight that weight sensor 9a, 9b measured is the weight of vessel, calculate the weight of food oneself thus though accuracy can variation.
In the case, can save the time of registering vessel weight in advance.Load identifying unit 6 can calculate load according to the food weight of such acquisition.And, in the case, owing to can before heating, judge load,, under the little situation of load, reinstate small-power and heat from the heating initial stage so can also be under the big situation of load reinstate high-power the heating from the heating initial stage.
In the above load of judging in this wise is under a spot of situation, sometimes, though utilize infrared ray sensor 3 to measure temperature as described above, owing to make infrared ray sensor 3 movable, so the renewal of temperature information is slow, the result has caused and has crossed heating.
In embodiments of the present invention, accelerate the renewal of temperature information through the movable required time that shortens infrared ray sensor 3, can prevent heating.
As use Fig. 2 illustrated, do not know to load and carried which position of putting in the heating clamber 2, so, make infrared ray sensor 3 movable with the mode of the temperature that can measure the gamut in the storehouse at the heating initial stage.But what actual needs was measured is limited in scope.Fig. 5 (A) shows the load of the heating device in the present invention's the 1st embodiment, and Fig. 5 (B) shows the Temperature Distribution in the heating clamber 2 of the heating device in the present invention's the 1st embodiment.A2～b2, f2～g2 in a2 in the storehouse～g2 scope is the scope of not placing any object, and the temperature DT1 of this moment is an environment temperature.
Relative therewith, b2～f2 is the above temperature of environment temperature DT1, but actual load instant food is the scope of c2～e2, and b2～c2, e2～f2 are for placing the vessel of food.Therefore, c2～e2 is enough to the movable range as infrared ray sensor 3.
But, in fact be difficult to judge that according to temperature information c2～e2 is that temperature, b2～c2, the e2～f2 of food is the temperature of placing the vessel of food.
Therefore; In the present invention, the maximum temperature (DT3 of Fig. 5 (B)) of the temperature that detection infrared ray sensor 3 determines, movable part 4 is movable in the scope that comprises the position (d2 of Fig. 5 (B)) that detects maximum temperature C; As long as like this, just can be movable in comprising the scope of food temperature reliably.
This movable range is also nonessential to be c2～e2, preferably little than the c2～e2 that comprises d2 scope.In addition, and nonessential be movable, also can fix in the position of d2.Like this, the position of maximum temperature is to have that electric wave is concentrated easily or the load temperature position of characteristics such as risings easily, so as long as measure the temperature of this position, that just can fully realize heating prevents etc., can carry out the good heating of processability.
As stated; Through constituting the such structure of embodiment of the present invention; Following heating device can be provided: when this heating device judges that at load identifying unit 6 load is a small amount of; More movable in the little scope when being volume than judging load, can shorten thus and detect the required time, took place to heat during can preventing in other scope, to move.
As stated, though heating device of the present invention at load for also detected temperatures apace under a spot of situation, can prevent heating, so be effective for the heating device that uses in the general family etc.
Claims (8)
1. heating device, it possesses:
The microwave generation unit;
Heating clamber, it takes in the load that heats with microwave;
Infrared ray sensor, it measures the temperature of load non-contactly;
Movable part, it makes said infrared ray sensor movably change the temperature measuring position in the said heating clamber;
Control module, it controls said microwave generation unit according to said infrared ray sensor temperature of measuring and the information that locates; And
The load identifying unit, it judges the load in the said heating clamber,
When said load identifying unit judges that load is a small amount of; Said control module detects the maximum temperature of the temperature of being measured, and said movable part is movable in following scope: the scope when this scope judges that than said load identifying unit load is volume is little and comprise the position that is measured to maximum temperature.
2. heating device according to claim 1, wherein,
Said movable part is measured to said temperature measuring fixed-site the position of maximum temperature in said infrared ray sensor.
3. heating device according to claim 1, wherein,
This heating device has humidity sensor, the vapor volume in the said heating clamber of this humidity sensor measuring,
Said load identifying unit comes the detection load amount according to the output that said control module has driven said humidity sensor afterwards of said microwave generation unit stipulated time.
4. heating device according to claim 1, wherein,
Said load identifying unit comes the detection load amount according to the variation of temperature rate that said infrared ray sensor is measured.
5. heating device according to claim 1, wherein,
Said load identifying unit is judged load through the weight of detection load.
6. heating device according to claim 1, wherein,
Said control module is judged the output that said microwave generation unit is changed in the front and back of load at said load identifying unit.
7. heating device according to claim 1, wherein,
Judge that at said load identifying unit load is under a spot of situation, said control module reduces the output of said microwave generation unit.
8. heating device according to claim 1, wherein,
After said movable part had changed the movable range of infrared ray sensor, said control module improved the output of said microwave generation unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-285587 | 2010-12-22 | ||
| JPJP2010-285587 | 2010-12-22 | ||
| JP2010285587A JP2012132624A (en) | 2010-12-22 | 2010-12-22 | Heating cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102538037A true CN102538037A (en) | 2012-07-04 |
| CN102538037B CN102538037B (en) | 2016-08-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110432385.5A Expired - Fee Related CN102538037B (en) | 2010-12-22 | 2011-12-21 | Heating device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012132624A (en) |
| CN (1) | CN102538037B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017217A (en) * | 2012-12-21 | 2013-04-03 | 敦泰科技有限公司 | Micro-wave oven control method, control equipment and micro-wave oven |
| CN103591620A (en) * | 2012-08-16 | 2014-02-19 | 广东美的厨房电器制造有限公司 | Microwave oven and control method thereof |
| CN103994480A (en) * | 2013-02-18 | 2014-08-20 | 广东美的厨房电器制造有限公司 | Microwave oven |
| CN106292780A (en) * | 2016-10-20 | 2017-01-04 | 英业达科技有限公司 | Temperature control equipment |
| TWI614458B (en) * | 2016-04-28 | 2018-02-11 | Hitachi Appliances Inc | High frequency heating conditioner |
| CN108852013A (en) * | 2018-05-11 | 2018-11-23 | 广东美的厨房电器制造有限公司 | Absolute humidity detection device, method and cooking apparatus for cooking apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6114530B2 (en) * | 2012-10-16 | 2017-04-12 | ルネサスエレクトロニクス株式会社 | Display device and display device driver |
| JP7002487B2 (en) * | 2019-02-25 | 2022-01-20 | 日立グローバルライフソリューションズ株式会社 | Cooker |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591620A (en) * | 2012-08-16 | 2014-02-19 | 广东美的厨房电器制造有限公司 | Microwave oven and control method thereof |
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| CN103017217A (en) * | 2012-12-21 | 2013-04-03 | 敦泰科技有限公司 | Micro-wave oven control method, control equipment and micro-wave oven |
| CN103994480A (en) * | 2013-02-18 | 2014-08-20 | 广东美的厨房电器制造有限公司 | Microwave oven |
| CN103994480B (en) * | 2013-02-18 | 2016-11-16 | 广东美的厨房电器制造有限公司 | Microwave oven |
| TWI614458B (en) * | 2016-04-28 | 2018-02-11 | Hitachi Appliances Inc | High frequency heating conditioner |
| CN106292780A (en) * | 2016-10-20 | 2017-01-04 | 英业达科技有限公司 | Temperature control equipment |
| CN108852013A (en) * | 2018-05-11 | 2018-11-23 | 广东美的厨房电器制造有限公司 | Absolute humidity detection device, method and cooking apparatus for cooking apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102538037B (en) | 2016-08-03 |
| JP2012132624A (en) | 2012-07-12 |
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