CN102679419A - Heating cooker - Google Patents
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- CN102679419A CN102679419A CN2012100620448A CN201210062044A CN102679419A CN 102679419 A CN102679419 A CN 102679419A CN 2012100620448 A CN2012100620448 A CN 2012100620448A CN 201210062044 A CN201210062044 A CN 201210062044A CN 102679419 A CN102679419 A CN 102679419A
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Abstract
The invention provides a heating cooker which can not reduce detection accuracy of a humidity sensor even load is small. The heating cooker is provided with a microwave production unit; a heating chamber (2) for accepting load to be heated by microwave; a fan (3) for feeding air into the heating chamber (2); a humidity sensor (4) for detecting quantity of steam in the heating chamber (2); an infrared sensor (5) for detecting load temperatures in a non-contact way; a load quantity determination unit (6) for determining load in the heating chamber (2) according to the infrared sensor (5); and a control unit (7) for controlling a rotation speed of the fan (3). The control unit (7) controls a rotation speed of the fan (3) according to the load quantity determined by the load determination unit (6) to change air quantity fed in the heating chamber (2). According to the structure, the detection accuracy of the humidity sensor (4) can be raised even the load is small and heating can stop in a case that heating is not performed no matter what the load is.
Description
Technical field
The present invention relates to the heating device of use in general family, dining room and office space etc.
Background technology
In the past; Example as this heating device; The method that is described below is disclosed in patent documentation 1: utilizing the situation of infrared ray sensor and utilize between the situation of humidity sensor; Through the rotating speed of change fan, discharge the steam in the heating clamber, so that easily carry out the detection in each sensor.
[patent documentation 1] japanese kokai publication sho 61-149732 communique
But in above-mentioned structure in the past, the quantity of steam that produces from food depends on load capacity, therefore under the few situation of load capacity, has the problem of the accuracy of detection reduction of humidity sensor.
In addition, be well known that if before producing steam from food, send into the dry air of volume, then food becomes dry, thus cooking achievement undesirable (for example, TOHKEMY 2006-46714 communique).
Summary of the invention
The objective of the invention is to; Following heating device is provided: even load capacity changes, also can not make food drying, can realize the selected cooking achievement of user; Even a spot of load is heated, also can under the situation that heating did not take place, stop heating automatically.
Heating device of the present invention has: the microwave generation unit; Heating clamber, it is taken in microwave and carries out heated load; Fan, it sends into air in said heating clamber; Humidity sensor, it measures the quantity of steam in the said heating clamber; Infrared ray sensor, it detects the temperature of load with non-contacting mode; The load capacity identifying unit, its temperature according to said infrared ray sensor is judged the load capacity in the said heating clamber; And control module, it controls the rotating speed of said fan, and the load capacity that said control module is judged according to said load capacity identifying unit is controlled the rotating speed of said fan, and change is sent to the air capacity in the said heating clamber.
Thus, even thereby, can not reduce the accuracy of detection of humidity sensor because of the quantity of steam of the few generation of load capacity is few yet.
The present invention can provide the heating device that is described below: even under the few situation of load capacity; Also can improve the accuracy of detection of humidity sensor; No matter be the load capacity of which kind of degree, can both under the situation that heating did not take place, stop heating, make that the achievement of heating is good.
Description of drawings
Fig. 1 is the profile of the heating device of embodiment 1 of the present invention;
Fig. 2 is the curve map of variation of humidity sensor that the heating device of embodiment 1 of the present invention is shown;
Fig. 3 is the curve map of variations in temperature of heating object that the heating device of embodiment 1 of the present invention is shown;
Fig. 4 is the curve map of Temperature Distribution that the heating device of embodiment 1 of the present invention is shown;
Fig. 5 is the figure of testing result of humidity sensor that the heating device of embodiment 1 of the present invention is shown;
Fig. 6 is the curve map of detected value of rotation status and humidity sensor of fan that the heating device of embodiment 3 of the present invention is shown.
Symbol description
1: the microwave generation unit; 2: heating clamber; 3: fan; 4: humidity sensor; 5: infrared ray sensor; 6: the load capacity identifying unit; 7: control module; 8: air entry; 9: exhaust outlet; 10: movable part.
The specific embodiment
The heating device of the 1st mode has: the microwave generation unit; Heating clamber, it is taken in microwave and carries out heated load; Fan, it sends into air in said heating clamber; Humidity sensor, it measures the quantity of steam in the said heating clamber; Infrared ray sensor, it detects the temperature of load with non-contacting mode; The load capacity identifying unit, its temperature according to said infrared ray sensor is judged the load capacity in the said heating clamber; And control module, it controls the rotating speed of said fan, and the load capacity that said control module is judged according to said load capacity identifying unit is controlled the rotating speed of said fan, and change is sent to the air capacity in the said heating clamber.
Thus, the food heating that is described below device can be provided: even because of thereby the quantity of steam of the few generation of load capacity is few, the accuracy of detection of humidity sensor can not reduce yet, and the cooking achievement during the automatic-cooking heating is good.
Heating device about the 2nd mode; Particularly in the 1st mode; Said heating device also has movable part; This movable part can make said infrared ray sensor move and change the measurement range in the said heating clamber, and said load capacity identifying unit is judged the load capacity in the said heating clamber according to the temperature of said infrared ray sensor and the information that locates.According to this structure, can estimate the size of load according to the scope that temperature rises, can further improve the judgement precision of load capacity.
Heating device about the 3rd mode; Particularly in the 1st or the 2nd mode; Said control module is controlled to: with load capacity that said load capacity identifying unit is judged is that the specified loads amount is compared when above; The load capacity of judging at said load capacity identifying unit makes that the rotating speed of said fan is higher during less than the specified loads amount.According to this structure, under the few situation of load capacity, make the air in the heating clamber flow to humidity sensor one side more, thereby can improve the accuracy of detection of humidity sensor.
About the heating device of the 4th mode, particularly in any mode of the 1st～3 mode, under the situation of load capacity less than the specified loads amount that said load capacity identifying unit is judged, said control module reduces the output of said microwave generation unit.According to this structure, under the few situation of load capacity, can prevent to become easily the situation of heating.
About the heating device of the 5th mode, particularly in any mode of the 1st～4 mode, the load capacity of judging when said load capacity identifying unit is during less than the specified loads amount, and said control module makes said fan rotation discontinuously repeatedly and stops.According to this structure, through the rotation that stops fan steam is accumulated in the heating clamber, fan is rotated increases the quantity of steam in the air that flows to humidity sensor, can improve the accuracy of detection of humidity sensor thus.
Heating device about the 6th mode; Particularly in any mode of the 1st～5 mode; Said load capacity identifying unit according to the rotating speed of said fan before changing with the output of after changing said humidity sensor; Judgement to load capacity is revised, and said control module further changes the rotating speed of said fan according to correction result.Based on this structure, can estimate load capacity to the influence degree that the output of humidity sensor produces according to the rotating speed of fan, can combine with result according to the load capacity judgement of judgement such as information of infrared ray sensor.Thus, can judge load capacity more accurately, can change to and the optimal rotation speed of the fan of load capacity.Therefore, can improve the accuracy of detection of humidity sensor.
Heating device about the 7th mode; Particularly in any mode of the 1st～6 mode; Load temperature when said load capacity identifying unit begins according to heating is differentiated load and whether is passed through freezing preservation; Be judged to be load through under the situation of freezing preservation at said load capacity identifying unit, compare with situation about not being judged to be through freezing preservation, said control module increases the rotating speed of said fan.Thus, can realize the heating device that is described below: even be difficult to produce the load of the freezing preservation of process of steam, the accuracy of detection of humidity sensor can not reduce yet, and can be automatically the temperature of load be heated to optimum state.
Below, with reference to accompanying drawing embodiment of the present invention is described.In addition, this embodiment does not limit the present invention.
(embodiment 1)
Fig. 1 is the profile that the heating device of embodiment 1 of the present invention is shown.
In Fig. 1, the heating device of this embodiment has: microwave generation unit 1; Heating clamber 2, it is taken in microwave and carries out heated load; Fan 3, it sends into air in heating clamber 2; Humidity sensor 4, it measures the quantity of steam in the heating clamber 2; Infrared ray sensor 5, it detects the temperature of load with non-contacting mode; Load capacity identifying unit 6, its temperature according to infrared ray sensor 5 are judged the load capacity in the heating clamber 2; And control module 7, its rotating speed to fan 3 is controlled.
About microwave generation unit 1, usually, use the situation of magnetron more, but also can be semiconductor-type etc.
In microwave generation unit 1, supply power according to illustrated inverter circuit etc. from the indication of control module 7 and never, produce microwave thus.The frequency of the microwave that is produced is 2450MHz normally, but is not limited thereto.
Microwave is to import in the heating clamber 2 through not shown waveguide pipe and antenna, but, also has following structure etc.: fix and make the mode of load rotation that the structure of turntable is set, load carried the structure that places same position and make the antenna rotation with antenna.
Though in heating clamber 2, have microwave, desirable situation is to have only load to obtain heating through microwave.Therefore, for example constituting under the situation of heating clamber 2 with glass etc., glass can generate heat because of microwave, thereby can produce loss on heating.Therefore, in order to reduce loss on heating, the metal that does not preferably generate heat, microwave is reflected because of microwave.But owing to need and will import in the heating clamber 2 from the microwave that microwave generation unit 1 produces, the part that therefore only will be used to import microwave usually changes to other materials.
The steam (moisture) that humidity sensor 4 detects from load generating.When being arranged on humidity sensor 4 in the heating clamber 2, there are stable on heating problem and the problem that produces noise, therefore humidity sensor 4 is arranged in the exhaust outlet 9.About humidity sensor 4, relative humidity sensor and absolute humidity sensor are arranged, can be wherein any.
Particularly in thermoelectric pile, have the thermoelectric pile of following type: this thermoelectric pile has a plurality of elements in an encapsulation, each element can detect the temperature of diverse location.Usually, for such element, it is more to take out the situation that the temperature of each element uses in order, but is not limited thereto.
For movable part 10, when having adopted stepper motor, it is fixing to locate, therefore more satisfactory, but also can be linear electric machine etc.In addition, in order to position, also can use rotary encoder etc.
In addition, movable part 10 can make infrared ray sensor 5 move, also can make infrared ray sensor 5 to move with two-dimensional approach with the one dimension mode.In addition, also can omit movable part 10, at this moment, design the visual angle of infrared ray sensor 5 greatly usually, but be not limited thereto.
The load capacity that load capacity identifying unit 6 is judged in the heating clamber 2 sends to control module 7 with its result.And control module 7 comes modification control method according to this load capacity.Load capacity identifying unit 6 also can be identical structural element with control module 7.In addition, the load capacity of load capacity identifying unit 6 judgements also can be used for confirming the computing of heat time heating time.In addition, in this embodiment, the load capacity that load capacity identifying unit 6 is judged is that the situation more than the specified loads amount is defined as " load capacity is big ", will be defined as " load capacity is little " less than the situation of specified loads amount.
When the user had set heating means and time etc. through not shown operating portion, control module 7 made not shown inverter circuit work and supplies power to microwave generation unit 1, produced microwave from microwave generation unit 1.
For control module 7, situation is used microcomputer, digital signal processor (DSP) or customization IC etc. mostly, but is not limited thereto.
Down in the face of as above work, 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 microwave that is produced by microwave generation unit 1 imports in the heating clamber 2 from the antenna that rotates.
Because antenna rotation, so the distribution of the microwave in the heating clamber 2 changes constantly, and no matter where carrying heating clamber 2 in put load can both obtain heating.Therefore, in 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 fixed antenna and make the load rotation.At this moment, owing to there is the turntable be used to make the load rotation, so the user need be carried load and puts on the turntable.
The user decides heating means through not shown operating portion.Usually, for such heating device, can select several kinds of heating means such as heating using microwave, light heater heating, baking heating, superheated steam heating mostly under the situation.In this embodiment, situation about heating through microwave is described.
In addition, as heating mode, exist by the user set manual mode that output (heating power) and time heats and only selection cook content and the automatic mode that automatically stops to heat etc.When the user has carried out selecting to these patterns and closed door, can begin heating.
When beginning to heat, control module 7 can move infrared ray sensor 5 through movable part 10, and with the temperature that infrared ray sensor 5 is measured in the heating clamber 2, control module 7 is accepted its temperature information and changed the control content.
In addition, 7 pairs of fans 3 of control module are controlled, and measure quantity of steam or humidity in the heating clamber 2 through humidity sensor 4, and accept its humidity information and change the control content.
About control content, for example under the situation of the process of having selected to heat automatically, continue to be heated to the temperature that sets, when reaching the temperature that sets, stop the work of microwave generation unit 1 and finish the heating.
At this moment, the output that control module 7 can detect infrared ray sensor 5 reaches with the corresponding output of the temperature that sets and stops heating, also can calculate heat time heating time according to initial temperature and load capacity, and after finishing heat time heating time, stop to heat.
Here, use Fig. 2 that humidity sensor 4 is described.Fig. 2 is the curve map of variation of humidity sensor that the heating device of embodiment 1 of the present invention is shown.In Fig. 2, when when having driven microwave generation unit 1 load being heated, the moisture that contains in the load is heated and becomes steam to be discharged.
The amount of the steam that is discharged is few amount (B-A) at low temperatures, but from certain temperature (about 60 ℃ of front and back), quantity of steam increases, and reaches boiling soon and the steam (C-A) of release volume.The quantity of steam (B-A or C-A) that produce this moment depends on load capacity.
Therefore, when under humidity sensor 4 detects the situation of quantity of steam of B-A, having stopped heating, different according to load capacity, it is different to accomplish temperature.Therefore, irrespectively become identical completion temperature, need tackle the difference of load capacity in order to use humidity sensor 4 and load capacity.
Here, the decision method to load capacity describes.Fig. 3 is the curve map of variations in temperature of heating object that the heating device of embodiment 1 of the present invention is shown.As shown in Figure 3; With the microwave of equal-wattage but under the situation that the different load (heating object) of amount volume is heated to same kind; About being heated to the required time of temperature B from temperature A; This time is Ta under a spot of situation, and under the situation of volume this time be Tb, Ta＜Tb wherein.
In addition, the relation of Ta and Tb is roughly proportional with its load capacity.Therefore, be under the situation more than the set point of temperature through the load temperature after certain stipulated time, load capacity identifying unit 6 detects to being a spot of load.
Here, the stipulated time need be such time (for example 15 seconds): under the situation that infrared ray sensor 5 can be moved, can not the stipulated time be set at and move below the required time, and even small loading, this time can not cause heating yet.
In addition, below the target temperature of judging required set point of temperature, be preferably the temperature that reached before the heating, i.e. heating, and optimum temperature is different because of load, therefore for example is set at 50 ℃ etc.
Perhaps, also can be according to reaching the required time computational load amount of set point of temperature (for example, 50 ℃).In addition, under the different perhaps unfixed situation of the power of the microwave that heats, also can use integral power to replace element of time.
Fig. 4 is the figure of Temperature Distribution that is used to explain the heating device of embodiment 1 of the present invention.Fig. 4 (α) illustrates in the heating clamber 2 to carry position and the curve map of putting of relation of height on the width the storehouse in that load on, Fig. 4 (β) be illustrate after heating begins to pass through the stipulated time, by the curve map of infrared ray sensor 5 detected Temperature Distribution.The temperature of the position at load place significantly rises, and (b～c), (a～b, the temperature of c～d) does not rise basically, therefore can detect the size of load and there is not the position of load.Load capacity identifying unit 6 can be judged load capacity according to these results.
Therefore, in this embodiment, infrared ray sensor 5 is that the temperature according to actual heated load rises and judges load capacity, therefore, also can judge load capacity exactly even the initial temperature of load changes.
In addition,, except said method, also has following method: weight sensor is set carrying the bottom of carrying the portion of putting put load, detects and carry the weight of putting portion and load as the decision method of load capacity.In the weight data of measuring thus, also include to be used to place and carry the portion of putting and as the weight of the container of the food of load etc.That is the weight data of, measuring by weight sensor sometimes with the varying in weight of load itself.Therefore, as the decision method of load capacity, the preferably above-mentioned method of using infrared ray sensor 5.But, in this embodiment, also can the operating weight sensor.In addition, under the situation of operating weight sensor, preferably be provided with the unit etc. that is used for accepting the input block of the information relevant with weight, the material that is used to judge container and size etc. and be used to judge the unit of load capacity accurately with the kind of container from the user.
The influence of the heating device fan 3 of this structure of explanation now.In Fig. 1, the inflow entrance that air flows in heating clamber 2 is 1 place's air entry 8, and the outlet of air is 1 place's exhaust outlet 9.
When making fan 3 rotations through control module 7, in heating clamber 2, send into air, and discharge air from exhaust outlet 9.
Here, when fan 3 was stopped, air no longer flow in the heating clamber 2, simultaneously, also no longer included air and discharged from exhaust outlet 9.Therefore, be trapped in the heating clamber 2 through load being heated the steam that produces, the output of humidity sensor 4 does not change.
That is to say, change, need therefore, need make fan 3 rotations in heating clamber 2, send into air from the air in the exhaust outlet 9 discharge heating clambers 2 in order to capture humidity.
Fig. 5 shows the testing result of humidity sensor of the heating device of embodiment 1 of the present invention, and this is the testing result of the humidity sensor 4 under certain condition.Show change as the amount of the water of load and put in the mug, and heat and the output of humidity sensor 4 when seething with excitement with identical heating power.In addition, with the speed (rotating speed) of fan of this moment be made as " by force " and " in " measure.
Can know that from Fig. 5 even when identical boiling, if load capacity changes, the quantity of steam that then produces is different, therefore, for the many sides of load capacity, the output of humidity sensor 4 is bigger.
And can know that for the strong side of the rotation of fan 3, the output of humidity sensor 4 is bigger.In addition, through the rotation that makes fan 3 drop to from " by force " " ", time output roughly reduces by 30% for volume in load, output roughly reduced more than 70% when load was a small amount of.
That is, can know: in load capacity after a little while, not only the output of humidity sensor 4 is little, and high to the dependence of the rotating speed of fan 3.Therefore, when being a small amount of, the output of humidity sensor 4 reduces in load, therefore receives the influence of noise etc. easily, existing problems aspect the accuracy of detection of humidity sensor 4.
In this embodiment, constitute following such heating device: in this heating device, the load capacity that control module 7 is judged according to load capacity identifying unit 6 is controlled the rotating speed of fan 3, and the amount of the air in the heating clamber 2 is delivered in change.
Be judged to be under the situation of load for a small amount of (load capacity is little) at load capacity identifying unit 6; Compare with the situation that is judged to be volume (load capacity is big); The output that increases humidity sensor 4 through the rotating speed that improves fan 3, thus the accuracy of detection of humidity sensor 4 can be improved.
Thus, the deviation of the completion temperature when having suppressed food heated can be provided, the heating device that ease of use is good.
In addition, owing to only when small loading, improve the rotating speed of fan 3, therefore, compare when becoming the state that has improved rotating speed all the time, can prevent the drying of food, and can reduce the noise of fan 3, can reduce the power consumption of fan 3.
(embodiment 2)
Then, embodiment 2 of the present invention is described.For omitting explanation, only difference is described with embodiment 1 identical part.
As explanation in the embodiment 1, load capacity identifying unit 6 is judged load capacity through the temperature that infrared ray sensor 5 detects load capacity.Because the rising of temperature is fast under the few situation of load, therefore,, also be heated to more than the target temperature easily even control module 7 stops microwave generation unit 1 according to the testing result of infrared ray sensor 5 or humidity sensor 4.
In order to prevent this situation, in this embodiment, the load capacity of judging at load capacity identifying unit 6 is judged as under the situation of " little ", and control module 7 reduces the output of microwave generation unit 1.Thus, can relax the rate of rise in temperature of load, raising makes load reach the precision of target temperature.
Therefore, even can provide load capacity to change also to suppress the deviation of the completion temperature when food heated, the heating device that ease of use is good.
(embodiment 3)
Then, embodiment 3 of the present invention is described.For omitting explanation, only difference is described with embodiment 1 identical part.
As explanation in the embodiment 1, under the few situation of load capacity, the generation of steam is also few, and humidity sensor 4 need capture its small variation, receives the influence of noise etc. easily and causes error to become big.
As one of its countermeasure, as explanation in the embodiment 1, the rotating speed that has provided through improving fan 3 to send into sufficient air to humidity sensor 4, improves the method for accuracy of detection thus.
As another countermeasure, in this embodiment, when the load capacity of load capacity identifying unit 6 judgements was " little ", control module 7 made fan 3 rotations discontinuously repeatedly and stops.
Under the situation that the rotation that makes fan 3 stops, not having pressure, so the air trapping in the heating clamber 2 is in heating clamber 2 from the outside, air can not flow into exhaust outlet 9 basically.Therefore, humidity sensor 4 can't be measured the humidity in the heating clamber 2 again.
On the other hand, load receives the heating of microwave generation unit 1 and produces steam, and the steam that is produced accumulates in the heating clamber 2.
And, in through the heating clamber 2 after during certain, accumulated under the state of steam, when control module 7 made fan 3 rotations, the air in the heating clamber 2 were from exhaust outlet 9 discharges.Thus, humidity sensor 4 can be measured the humidity in the heating clamber 2.Fig. 6 shows the state of this moment.
Fig. 6 is the curve map of detected value of rotation status and humidity sensor of fan that the heating device of embodiment 3 of the present invention is shown.Fig. 6 (a) shows the detected value of humidity sensor 4, the timing when Fig. 6 (b) shows the rotation of opening fan 3 during with the rotation that stops fan 3.
When fan 3 did not rotate, the air of humidity sensor 4 peripheries did not flow, so humidity sensor 4 continues the identical detected value of maintenance.On the other hand, when fan 3 rotation, in heating clamber 2, send into air, the air in the heating clamber 2 are forced out and flow into the periphery of humidity sensor 4, and hence one can see that: can measure the humidity in the heating clamber 2.
As stated; Even, also can temporarily stop to make steam to accumulate in the heating clamber 2, therefore through making fan because of load is thereby that a small amount of quantity of steam that produces is few; Even the generation from load is few, also can under the situation of the accuracy of detection that does not reduce humidity sensor, measure.
Here, about the timing that makes fan 3 rotations and stop, owing to can not produce steam basically at the heating initial stage, therefore the rotation to fan 3 does not almost influence.But when beginning to produce steam, quantity of steam once increases.
Therefore, can be at the heating initial stage, with fan be fixed in stop or rotating in a certain state, along with carrying out the control of fan by the rising of infrared ray sensor 5 detected load temperatures.In addition, make fan 3 rotation need not to be the identical time with the time that stops, can deciding according to the accuracy of detection of humidity sensor 4 stopping period, promptly accumulate steam during.
And, about the open period of fan 3, can consider that decide open period the start-up time of the rotation of fan 3, also can merely periodically repeat the set time (for example, rotation 5 seconds, stop 5 seconds).
The testing result of the humidity sensor 4 when control module 7 rotates according to fan 3 changes or stops the output of microwave generation unit 1.Through carrying out aforesaid control, even load capacity is few, the accuracy of detection of humidity sensor 4 can not reduce yet, and therefore, the deviation of the completion temperature when having suppressed food heated can be provided, the heating device that ease of use is good.
(embodiment 4)
Then, embodiment 4 of the present invention is described.For omitting explanation, only difference is described with embodiment 1 identical part.
As explanation in the embodiment 1, the velocity effect that the output of humidity sensor 4 receives load capacity and fan 3 is big.As use Fig. 5 explains, even under the same conditions, through the speed with fan 3 change to from " by force " " ", load capacity is exported for a long time and is roughly reduced by 30%, and load capacity is exported roughly after a little while and reduced more than 70%.
That is to say that load capacity is different, the velocity effect degree of fan 3 is different.Therefore, can be according to the speed of fan 3 judge load capacity with the rate of change of the output of after changing humidity sensor 4 before changing.
Thus; After having changed the speed of fan 3 according to the load capacity of the judgements such as output of infrared ray sensor 5 based on load capacity identifying unit 6; Load capacity identifying unit 6 is considered the influence of the speed change of fan 3 to the output of humidity sensor 4; Next further judgement load capacity (below, the load capacity of judging here is called the 2nd load capacity).Thus, can judge load capacity more accurately.And this load capacity identifying unit 6 sends the 2nd load capacity to control module 7, and control module 7 changes the speed of fan 3 according to the 2nd load capacity, can carry out the detection of humidity sensor 4 with higher precision thus.According to this structure, the deviation of the completion temperature when having suppressed food heated can be provided, the heating device that ease of use is good.
(embodiment 5)
Then, embodiment 5 of the present invention is described.For omitting explanation, only difference is described with embodiment 1 identical part.
Even load is identical, also can because of whether it pass through freezing preservation, cause the quantity of steam that produces when it is heated different.Generally speaking, the amount of moisture of the load of the freezing preservation of process reduces, so quantity of steam tails off.
That is to say that the output of humidity sensor 4 reduces and is not easy to detect.Therefore, through under the situation of freezing preservation, as explanation in the embodiment 1, the output through the rotating speed that improves fan 3 increases humidity sensor 4 can prevent the decline of accuracy of detection in load.
Can detect load according to the output of infrared ray sensor 5 and whether pass through freezing preservation.Load temperature when for example, infrared ray sensor 5 detects the heating beginning.And load capacity identifying unit 6 is differentiated load and whether is passed through freezing preservation according to detected load temperature.And, determining load through moment of freezing preservation, compare the rotating speed of control module 7 raising fans 3 when not being judged to be through freezing preservations.According to this structure, can prevent the decline of the accuracy of detection of humidity sensor 4.
Therefore, the deviation that has suppressed the completion temperature when heating through the food of freezing preservation can be provided, the heating device that usability is good.
Though at length describe the present invention, it will be apparent to those skilled in the art that and under the situation that does not break away from the spirit and scope of the present invention, to carry out various changes or correction with reference to specific embodiment.In addition, also can in the scope that does not break away from main idea of the present invention, at random make up each structural element in the above-mentioned embodiment.
Utilizability on the industry
As stated; For heating device of the present invention; Even under the few situation of load capacity, also can improve the accuracy of detection of humidity sensor,, can both under the situation that heating did not take place, stop heating no matter be what kind of load capacity; Can make that the cooking achievement when heating finishes is good, therefore very useful to middle heating devices that uses such as general families.
Claims (7)
1. heating device, this heating device has:
The microwave generation unit;
Heating clamber, it is taken in microwave and carries out heated load;
Fan, it sends into air in said heating clamber;
Humidity sensor, it measures the quantity of steam in the said heating clamber;
Infrared ray sensor, it detects the temperature of load with non-contacting mode;
The load capacity identifying unit, its temperature according to said infrared ray sensor is judged the load capacity in the said heating clamber; And
Control module, it controls the rotating speed of said fan,
The load capacity that said control module is judged according to said load capacity identifying unit is controlled the rotating speed of said fan, and change is sent to the air capacity in the said heating clamber.
2. heating device according to claim 1, wherein,
This heating device also has movable part, and this movable part can make said infrared ray sensor move and change the measurement range in the said heating clamber,
Said load capacity identifying unit is judged the load capacity in the said heating clamber according to the temperature of said infrared ray sensor and the information that locates.
3. heating device according to claim 1 and 2, wherein,
Said control module is controlled to: with load capacity that said load capacity identifying unit is judged is that the specified loads amount is compared when above, and the load capacity of judging at said load capacity identifying unit makes that the rotating speed of said fan is higher during less than the specified loads amount.
4. heating device according to claim 1 and 2, wherein,
Under the situation of load capacity less than the specified loads amount that said load capacity identifying unit is judged, said control module reduces the output of said microwave generation unit.
5. heating device according to claim 1 and 2, wherein,
The load capacity of judging at said load capacity identifying unit is during less than the specified loads amount, and said control module makes said fan rotation discontinuously repeatedly and stops.
6. heating device according to claim 1 and 2, wherein,
Said load capacity identifying unit according to the rotating speed of said fan before changing and the output of said humidity sensor after changing, the judgement of load capacity is revised,
Said control module further changes the rotating speed of said fan according to correction result.
7. heating device according to claim 1 and 2, wherein,
Load temperature when said load capacity identifying unit begins according to heating is differentiated load and whether is passed through freezing preservation,
Be judged to be load through under the situation of freezing preservation at said load capacity identifying unit, compare with situation about not being judged to be through freezing preservation, said control module improves the rotating speed of said fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011054113A JP2012189274A (en) | 2011-03-11 | 2011-03-11 | Heating cooker |
| JP2011-054113 | 2011-03-11 |
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| Publication Number | Publication Date |
|---|---|
| CN102679419A true CN102679419A (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100620448A Pending CN102679419A (en) | 2011-03-11 | 2012-03-09 | Heating cooker |
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| Country | Link |
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| JP (1) | JP2012189274A (en) |
| CN (1) | CN102679419A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191981A (en) * | 2017-07-04 | 2017-09-22 | 谢勇 | Electricthermal furnace provided with movable steam detection means |
| CN110815718A (en) * | 2019-11-28 | 2020-02-21 | 武汉市盛祥塑料制品有限公司 | Injection molding process of plastic spoon |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211396A (en) * | 2016-07-28 | 2016-12-07 | 刘万斌 | A kind of electromagnetic steam cabinet intelligent controlling device |
| JP6629151B2 (en) * | 2016-08-16 | 2020-01-15 | ホシザキ株式会社 | Cooking device |
-
2011
- 2011-03-11 JP JP2011054113A patent/JP2012189274A/en not_active Withdrawn
-
2012
- 2012-03-09 CN CN2012100620448A patent/CN102679419A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191981A (en) * | 2017-07-04 | 2017-09-22 | 谢勇 | Electricthermal furnace provided with movable steam detection means |
| CN110815718A (en) * | 2019-11-28 | 2020-02-21 | 武汉市盛祥塑料制品有限公司 | Injection molding process of plastic spoon |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012189274A (en) | 2012-10-04 |
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Application publication date: 20120919 |