CN1704671A - Microwave oven control method - Google Patents
Microwave oven control method Download PDFInfo
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- CN1704671A CN1704671A CN 200410019389 CN200410019389A CN1704671A CN 1704671 A CN1704671 A CN 1704671A CN 200410019389 CN200410019389 CN 200410019389 CN 200410019389 A CN200410019389 A CN 200410019389A CN 1704671 A CN1704671 A CN 1704671A
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Abstract
This invention provides a controlling method of microwave oven, using the infrared sensor which comprises several temperature sensors in the oven; the controlling method comprises the following steps: a) setting the calculating formula to compute the base temperature and heat energy value; b) temperature sensing by the infrared sensor; c) comparing the tested temperature to the base temperature, if it is smaller than the base temperature, using the tested temperature to compute the heat energy value; d) controlling the heat energy according to the computing result. Said invention can prevent the food being charred when defreezing, and can reach to the best cooking condition.
Description
Technical scope
The present invention relates to the micro-wave oven scope, relate in particular to the control method of microwave oven of temperature in the infrared ray sensor sensing stove of arranging with array type.
Background technology
The micro-wave oven of prior art has used single infrared ray sensor, and infrared ray sensor is used for the temperature that sensing is placed on the food of inside cavity as temperature-sensitive sticker.But during product export, the sensing angle according to the single infrared ray sensor of setting is merely able to the subregion on the sensing rotating disk.When food exceeds the sensing scope of infrared ray sensor, just can not sensing temperature, even food is positioned at the sensing scope of infrared ray sensor because sensing scope is limited, also may sensing less than temperature.Behind the infrared ray sensor sensing temperature, according to sensing result control cooking.In the control method of microwave oven of prior art, during with the temperature in the infrared ray sensor sensing stove, the subregion on the sensing cooking room inner rotary table.
When the micro-wave oven of prior art utilizes infrared ray sensor to judge the stove internal state,,, cause the food can not be well-done or burnt so, have certain restriction when judging the state of food in the stove correct according to the temperature of being measured because the sensitive zones that senses is little.
Summary of the invention
Technical problem to be solved by this invention is, a kind of control method of microwave oven is provided, and utilizes a plurality of infrared ray sensors to enlarge sensitive zones, thereby improves cooking result's correctness.
For the technical solution problem, the technical solution used in the present invention is:
The invention provides a kind of control method of microwave oven, in the micro-wave oven stove, infrared ray sensor is installed, infrared ray sensor is made of a plurality of temperature detecting sensors, this control method of microwave oven comprises the setting stage, the temperature sensing stage, relatively judge the stage, calculate the heat energy stage, the output control stage, in the setting stage, computing formula is set calculates reference temperature value and heat energy size, in the temperature sensing stage, when the every rotation of rotating disk one time, with temperature in the infrared ray sensor sensing stove, relatively judging the stage, relatively by temperature and reference temperature value in the stove of temperature sensing stage sensing, calculating the heat energy stage, if when judging that relatively temperature is less than reference temperature value in the stage stove, on the benchmark computing formula that the temperature substitution in the stove that senses by the temperature sensing stage is set, calculate the size of heat energy, in the output control stage, by result of calculation, heat energy is exported in control in stove.And calculate initial temperature in the stage, initial temperature selects one among getting the mean value of central portion sensor and minimum temperature.
Another kind of control method of microwave oven provided by the invention, this micro-wave oven is installed infrared ray sensor in stove, infrared ray sensor is made of a plurality of temperature detecting sensors, and this control method of microwave oven comprises that setting stage, temperature sensing stage, initial temperature calculate the stage, first and judge that relatively the stage, second relatively judges the stage, adds the thermal control stage.In the setting stage, set the computing formula of reference temperature value and food initial temperature, in the temperature sensing stage, when the every rotation of rotating disk one time with temperature in the infrared ray sensor sensing stove, calculate the stage in initial temperature, after calculating formula, calculate initial temperature according to temperature substitution initial temperature in the stove of temperature sensing stage sensing, relatively judge the stage first, after relatively judging the initial temperature calculating stage, continue the interior temperature of stove and the reference temperature value of the temperature sensing sensor sensing of heating back central portion, relatively judge the stage second, if first relatively judges when temperature surpasses reference temperature value in the stage stove, relatively judge by the edge sensor sensed temperature and whether surpass reference temperature value, adding the thermal control stage, control judges relatively that according to first the stage and second relatively judges the stage, to the heat energy of furnace chamber output, calculate the stage in initial temperature, initial temperature is to select one among the mean value of master reference and the minimum temperature.
The invention has the beneficial effects as follows:
Can prevent in the food of the present invention in the stove that thaws that the food in the stove from burning, and can obtain best cooking status.
Description of drawings
The control system figure that Fig. 1 drives for control micro-wave oven of the present invention.
Fig. 2 a is the output state schematic diagram of the heat energy that micro-wave oven drives according to the present invention.
The sensitive zones schematic diagram of the infrared ray sensor in Fig. 2 b micro-wave oven stove of the present invention.
Fig. 3 is the workflow diagram of control method of microwave oven first embodiment of the present invention.
Fig. 4 is the workflow diagram of driving control algolithm second embodiment of micro-wave oven of the present invention.
Fig. 5 is the workflow diagram of driving control algolithm the 3rd embodiment of micro-wave oven of the present invention.
Wherein:
10: power supply 20: signal input part
30: infrared ray sensor 40: microcontroller
50: heater-driven portion 60: driven by magnetron portion
The specific embodiment
Below in conjunction with the drawings and specific embodiments control method of microwave oven of the present invention is described in further detail:
As shown in Figure 1, the control system of micro-wave oven of the present invention comprises power supply 10, signal input part 20, driven by magnetron portion 60, heater-driven portion 50, infrared ray sensor 30, microcontroller 40, power supply 10 provides power supply, signal input part 20 input cooking signals, driven by magnetron portion 60 is according to cooking signal controlling driven by magnetron, heater-driven portion 50 control heaters drive, food temperature in the infrared ray sensor 30 sensing stoves, in microcontroller 40 sensings are come out of the stove after the temperature, and according to food heating in this temperature-controlled oven.Microcontroller 40 judges from the temperature of the food of infrared ray sensor 30 inputs, judge back control according to food position in the stove add heat output and output time, make heat food under optimum condition.Calculate heat energy, and control is heated furnace chamber with the heat energy value that calculates according to the temperature change value of exterior object temperature and food for this reason.The heat energy of exporting in stove among the present invention is calculated with following computing formula, and must substitution exterior object temperature T s and temperature change value Dt.
Computing formula is P=5 * (12-0.5 * (Ts+Dt))
Calculate with computing formula in the process of heat energy, with the some cycles repeated calculation of rotating disk rotation.
The following describes the work control procedure of micro-wave oven of the present invention.Shown in Fig. 2 a, when exporting heat energy in the micro-wave oven stove, the temperature of furnace interior changes.After after a while, the temperature in the stove rises.When being rapidly heated to design temperature in the stove, cook finish-time even also be less than, the output of heat energy also can stop.Therefore, need to be grasped the output that the interior temperature of stove is controlled heat energy.
The infrared ray sensor 30 that the array type that is made of a plurality of infrared ray sensor elements T 1, T2, T3, T4 among the present invention is arranged is installed in the micro-wave oven stove.Shown in Fig. 2 b, each infrared ray sensor 30 all has sensitive zones separately.Second temperature sensor T2 in the infrared ray sensor and the 3rd temperature sensor T3 sensing core in the stove, and first temperature sensor T1 in the infrared ray sensor and the 4th temperature sensor T4 sensing stove inward flange part.As shown in Figure 3, after the energising, judge the temperature of food in the stove and the state in the stove for correct, and with the interior temperature of infrared ray sensor 30 sensing stoves.The infrared ray sensor that infrared ray sensor 30 is arranged for the array type that a plurality of temperature sensing sensor element T1, T2, T3, T4 are installed, and the angle of each temperature sensing sensor sensing is different mutually, and the sensitive zones of sensing is also different.Begin thus to thaw, and along with the rotating disk rotation, be installed in the different sensitive zones of infrared ray sensor difference sensing of a side in the stove, this was the 100th stage.Food temperature when this moment, the sensing rotating disk circled the phase.Institute's sensed temperature is communicated to microcontroller 40, and microcontroller 40 is according to the output of the temperature value control heat energy of passing on.By computing formula, calculate the heat energy value of exporting in stove then, this was the 110th stage.By after the exterior object temperature and temperature change value substitution computing formula of infrared ray sensor 30 sensings, calculate the heat energy value.After calculating the heat energy value, microcontroller 40 drives control heater drive division 50 and driven by magnetron portion 60, and heat energy is exported in stove.Its result exports the heater heat by the driving of heater-driven portion 50 in stove, by the driving of driven by magnetron portion 60, export microwave in stove.When exporting heat energy in stove, judge whether the numerical value of the interior temperature of stove of infrared ray sensor 30 sensings surpasses a reference value of setting at microcontroller 40, this was the 120th stage.After the numerical value of temperature surpasses certain level in the stove of judged result infrared ray sensor 30 sensings, stop heating and stop thawing the cooking, this was the 160th stage.Thereby prevented because too high temperature and some position of food is burnt.If but when the numerical value of temperature is less than a reference value set at microcontroller 40 in the stove of infrared ray sensor 30 sensings, continue to measure the temperature in the stove.Check the temperature of food when the rotating disk revolution moves one time, this was the 130th stage.The 130th stage sensed temperature numerical value comprises exterior object temperature and temperature change value, after this value substitution computing formula, draws the heat energy value of exporting in stove, and this was the 140th stage.Above-mentioned process from 150 stages of the 120th stage to the is carried out repeatedly, and up to the heating work that stops micro-wave oven, this was the 150th stage.
Fig. 4 is the workflow diagram of driving control algolithm second embodiment of micro-wave oven of the present invention.The second embodiment of the present invention as shown in the figure, after micro-wave oven is connected power supply, for temperature and the stove internal state of understanding food in the stove, and with the interior temperature of infrared ray sensor stove.At this moment, the sensitive zones of infrared ray sensor is the same with the sensitive zones shown in Fig. 2 b, is temperature in the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensing stove by master reference only, and this was the 200th stage.And the first temperature sensing sensor T1 and the 4th temperature sensing sensor T4 be sensing temperature not.Then being communicated to microcontroller 40 by the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensed temperature numerical value.The temperature data of microcontroller 40 to receive, the mean value of temperature data or minimum temperature data are set to initial temperature, and this was the 210th stage.And carry out continuing heating in the process in the 200th stage, the 210th stage, this was the 220th stage, and the rotating disk revolution just detects temperature in the stove moving one time, and this was the 230th stage.Judge relatively then whether the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensed temperature value from infrared ray sensor surpass the reference temperature value that microcontroller 40 is provided with, and this was the 240th stage.The purpose in this stage is in order to prevent that food from burning because being subjected to too fast heating.Relatively judgement according to the 240th stage, when the temperature of the middle body of the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensing surpasses the reference temperature value of setting, judge relatively whether the first temperature sensing sensor T1 and the 4th temperature sensing sensor T4 sensed temperature surpass the reference temperature value of setting, and this was the 260th stage.Master reference comprises the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3, edge sensor comprises the first temperature sensing sensor T1 and the 4th temperature sensing sensor T4, relatively judgement according to the 260th stage, master reference detects the temperature above a reference value, after edge sensor detects temperature above a reference value, stop the heating action.When the temperature of the central portion of this external the 240th stage second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensing is no more than the reference temperature value of setting, normally carry out repeatedly from the process in 240 stages of the 220th stage to the.And carry out repeatedly from time in 240 stages of the 220th stage to the and arrive finish-time, stop the heating action when this was the 250th stage.
Fig. 5 is the workflow diagram of driving control algolithm the 3rd embodiment of micro-wave oven of the present invention.The third embodiment of the present invention as shown in the figure is after micro-wave oven is connected power supply, for the temperature of understanding food in the stove, stove internal state and with temperature in the infrared ray sensor stove.The sensitive zones of the infrared ray sensor of the interior temperature of sensing stove this moment is the same with the sensitive zones shown in Fig. 2 b, is temperature in the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensing stove by master reference only, and this was the 300th stage.While first temperature sensing sensor T1 and the 4th temperature sensing sensor T4 be sensing temperature not.Then being communicated to microcontroller 40 by the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensed temperature numerical value.The temperature data of microcontroller 40 to receive, the little temperature data in the mean value of temperature data or two Temperature numerical is set to initial temperature, and this was the 310th stage.And carry out continuing heating in the process in the 300th stage, the 310th stage, this was the 320th stage, and the rotating disk revolution just detects temperature in the stove moving one time, and this was the 330th stage.Judge relatively then whether the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensed temperature value from infrared ray sensor 30 surpass the reference temperature value that microcontroller 40 is provided with, and this was the 340th stage.The purpose in this stage is in order to prevent that food from burning because being subjected to too fast heating.According to the relatively judgement in the 340th stage, when the temperature of the middle body of the second temperature sensing sensor T2 and the 3rd temperature sensing sensor T3 sensing surpasses the reference temperature value of setting, relatively judge the temperature of marginal portion, this was the 360th stage.The words that describe in detail, when the second temperature sensing sensor T2 sensed temperature data surpass reference temperature value, relatively judge by the first temperature sensing sensor T1, the second temperature sensing sensor T2, the 3rd temperature sensing sensor T3 sensed temperature data whether surpass the reference temperature value of setting.And relatively judgement according to the 360th stage, if the second temperature sensing sensor T2 sensed temperature surpasses a reference value, when the first temperature sensing sensor T1, the second temperature sensing sensor T2, the 3rd temperature sensing sensor T3 sensed temperature surpass a reference value, the food that microcontroller 40 just is judged as in the stove is ripe, stops the heating action in order to prevent this phenomenon.When these external the 360th stage the 3rd temperature sensing sensor T3 sensed temperature data surpass reference temperature value, judge relatively whether the second temperature sensing sensor T2, the 3rd temperature sensing sensor T3, the 4th temperature sensing sensor T4 sensed temperature data surpass the reference temperature value of setting.And according to the result who relatively judges, if the 3rd temperature sensing sensor T3 sensed temperature data surpass a reference value, and when the second temperature sensing sensor T2, the 3rd temperature sensing sensor T3, the 4th temperature sensing sensor T4 sensed temperature surpass a reference value, microcontroller 40 just judges that the food in the stove is ripe, stops the heating action.When this external the 340th stage, the central portion temperature by the second temperature sensing sensor T2 or the 3rd temperature sensing sensor T3 sensing was no more than the reference temperature value of setting, carry out repeatedly from the process in 340 stages of the 320th stage to the.When arriving finish-time from time of carrying out repeatedly in 340 stages of the 320th stage to the, this was the 350th stage, stopped the heating action.
Used the infrared ray sensor that is made of four temperature sensors in the embodiment of the invention, this is a kind of embodiment, but can use whole infrared ray sensors that are made of a plurality of temperature sensors among the present invention.Basic fundamental of the present invention is contemplated that: in the process of the food in the micro-wave oven stove that thaws, in order to prevent burning foods, and distinguish several sensitive zones, to grasp the stove internal state and to heat furnace chamber.
The invention described above under the prerequisite that does not exceed definite design of the present invention of right request scope and scope, can be made change miscellaneous and modification according to those skilled in the art's understanding.
Claims (3)
1, a kind of control method of microwave oven, in the micro-wave oven stove, infrared ray sensor is installed, infrared ray sensor is made of a plurality of temperature detecting sensors, it is characterized by: described control method of microwave oven comprises the setting stage, the temperature sensing stage, relatively judge the stage, calculate the heat energy stage, the output control stage, in the setting stage, computing formula is set calculates reference temperature value and heat energy size, in the temperature sensing stage, when the every rotation of rotating disk one time, with temperature in the infrared ray sensor sensing stove, relatively judging the stage, relatively by temperature and reference temperature value in the stove of temperature sensing stage sensing, calculating the heat energy stage, if when judging that relatively temperature is less than reference temperature value in the stage stove, on the benchmark computing formula that the temperature substitution in the stove that senses by the temperature sensing stage is set, calculate the size of heat energy, in the output control stage, by result of calculation, heat energy is exported in control in stove.
2, a kind of control method of microwave oven, described micro-wave oven is installed infrared ray sensor in stove, infrared ray sensor is made of a plurality of temperature detecting sensors, it is characterized in that: described control method of microwave oven comprises that setting stage, temperature sensing stage, initial temperature calculate the stage, first and judge that relatively the stage, second relatively judges the stage, adds the thermal control stage.In the setting stage, set the computing formula of reference temperature value and food initial temperature, in the temperature sensing stage, when the every rotation of rotating disk one time with temperature in the infrared ray sensor sensing stove, calculate the stage in initial temperature, after calculating formula, calculate initial temperature according to temperature substitution initial temperature in the stove of temperature sensing stage sensing, relatively judge the stage first, after relatively judging the initial temperature calculating stage, continue the interior temperature of stove and the reference temperature value of the temperature sensing sensor sensing of heating back central portion, relatively judge the stage second, if first relatively judges when temperature surpasses reference temperature value in the stage stove, relatively judge by the edge sensor sensed temperature and whether surpass reference temperature value, adding the thermal control stage, control judges relatively that according to first the stage and second relatively judges the stage, to the heat energy of furnace chamber output, calculate the stage in initial temperature, initial temperature is to select one among the mean value of master reference and the minimum temperature.
3, according to right request 1 described control method of microwave oven, it is characterized in that: calculate initial temperature in the stage, initial temperature selects one among getting the mean value of central portion sensor and minimum temperature.
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| CN 200410019389 CN1704671A (en) | 2004-05-27 | 2004-05-27 | Microwave oven control method |
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| CN 200410019389 CN1704671A (en) | 2004-05-27 | 2004-05-27 | Microwave oven control method |
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| CN1704671A true CN1704671A (en) | 2005-12-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750169A (en) * | 2008-12-04 | 2010-06-23 | 乐金电子(天津)电器有限公司 | Measuring method for unfrozen object in microwave oven |
| CN101940351A (en) * | 2009-07-10 | 2011-01-12 | 乐金电子(天津)电器有限公司 | Food defrosting method for microwave oven |
| CN102192546A (en) * | 2010-03-10 | 2011-09-21 | 乐金电子(天津)电器有限公司 | Method for identifying temperature of food through toast rack array sensor |
| CN102235693A (en) * | 2010-04-27 | 2011-11-09 | 乐金电子(天津)电器有限公司 | Defrosting method of microwave oven |
| CN104676680A (en) * | 2014-02-14 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven and microwave thawing method for microwave oven |
| CN105318370A (en) * | 2015-09-09 | 2016-02-10 | 深圳市福田区青少年科技教育协会 | Intelligent environment-friendly microwave oven |
| CN105739312A (en) * | 2016-04-27 | 2016-07-06 | 广东美的厨房电器制造有限公司 | Control method, control device and heating system |
| CN108679663A (en) * | 2018-05-21 | 2018-10-19 | 广东美的厨房电器制造有限公司 | Microwave oven defrosting control method, micro-wave oven, terminal and computer storage media |
-
2004
- 2004-05-27 CN CN 200410019389 patent/CN1704671A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750169A (en) * | 2008-12-04 | 2010-06-23 | 乐金电子(天津)电器有限公司 | Measuring method for unfrozen object in microwave oven |
| CN101750169B (en) * | 2008-12-04 | 2013-09-11 | 乐金电子(天津)电器有限公司 | Measuring method for unfrozen object in microwave oven |
| CN101940351A (en) * | 2009-07-10 | 2011-01-12 | 乐金电子(天津)电器有限公司 | Food defrosting method for microwave oven |
| CN101940351B (en) * | 2009-07-10 | 2013-09-25 | 乐金电子(天津)电器有限公司 | Food defrosting method for microwave oven |
| CN102192546B (en) * | 2010-03-10 | 2015-05-20 | 乐金电子(天津)电器有限公司 | Method for identifying temperature of food through toast rack array sensor |
| CN102192546A (en) * | 2010-03-10 | 2011-09-21 | 乐金电子(天津)电器有限公司 | Method for identifying temperature of food through toast rack array sensor |
| CN102235693A (en) * | 2010-04-27 | 2011-11-09 | 乐金电子(天津)电器有限公司 | Defrosting method of microwave oven |
| CN102235693B (en) * | 2010-04-27 | 2015-06-10 | 乐金电子(天津)电器有限公司 | Defrosting method of microwave oven |
| CN104676680A (en) * | 2014-02-14 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven and microwave thawing method for microwave oven |
| CN104676680B (en) * | 2014-02-14 | 2018-09-14 | 广东美的厨房电器制造有限公司 | Micro-wave oven and microwave thawing method for micro-wave oven |
| CN105318370A (en) * | 2015-09-09 | 2016-02-10 | 深圳市福田区青少年科技教育协会 | Intelligent environment-friendly microwave oven |
| CN105739312A (en) * | 2016-04-27 | 2016-07-06 | 广东美的厨房电器制造有限公司 | Control method, control device and heating system |
| CN105739312B (en) * | 2016-04-27 | 2019-04-30 | 广东美的厨房电器制造有限公司 | Control method, control device and heating system |
| CN108679663A (en) * | 2018-05-21 | 2018-10-19 | 广东美的厨房电器制造有限公司 | Microwave oven defrosting control method, micro-wave oven, terminal and computer storage media |
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