CN102235693B - Defrosting method of microwave oven - Google Patents
Defrosting method of microwave oven Download PDFInfo
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- CN102235693B CN102235693B CN201010156692.0A CN201010156692A CN102235693B CN 102235693 B CN102235693 B CN 102235693B CN 201010156692 A CN201010156692 A CN 201010156692A CN 102235693 B CN102235693 B CN 102235693B
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Abstract
The invention relates to a defrosting method of a microwave oven. The method is characterized by: detecting a initial lowest temperature of a food through a temperature sensor before starting each corresponding power level, simultaneously determining a base operation power and a corresponding power level; continuously adjusting execution power of a magnetron according to a difference between a lowest temperature at current time and the initial lowest temperature during a process of food defrosting through the magnetron, such that the power of the magnetron is continuously changed instantaneously according to a actual condition of the defrosted food; reducing the difference between the food surface and the food interior through promptly changing a plurality of power levels; promptly switching the power of the magnetron, such that the excess defrosting of the food is avoided.
Description
Technical field
The invention belongs to the technical field of micro-wave oven, be specifically related to a kind of multi-point temp being treated unfrozen object by multi-sample point measurement, the initial minimum temperature of measurement and Current Temperatures and initial temperature difference is utilized to draw execution power constant, thus press food actual conditions power switched shelves, guarantee that object can obtain the defreezing method that optimum solution freezes the micro-wave oven of effect.
Technical background
Micro-wave oven is that magnetron produces microwave after power supply is connected, and these microwave irradiations device of cooking food on the heating objects such as food.Such micro-wave oven can be divided into the domestic microwave oven being equipped with small size magnetic keyholed back plate and the business micro-wave oven being equipped with large-scale or multiple magnetron.Micro-wave oven can also be divided into domestic microwave oven according to the mode of heat food and generally adopt the glass rotary disc mode rotating and fill food, and business micro-wave oven mainly adopts the figure of confusion mode of scattered radiation microwave.Business micro-wave oven is mainly applicable to the high convenience store of utilization rate and will the food supply retail shop of cooking food at short notice, needs the output relatively high compared with domestic microwave oven so general.
Fig. 1 is the structural representation of micro-wave oven.
As shown in Figure 1, micro-wave oven comprises by the shell forming outward appearance, furnace chamber 20 and the electricity storage chamber 30 being positioned at side on the right side of furnace chamber 20, also comprises the door 40 be located at before furnace chamber 20.Be provided with handle 41 at the right-hand member of the lateral surface of door 40, two ends and the door 40 of handle 41 are screwed connection.Shell forms micro-wave oven outward appearance, also plays the effect protecting inner furnace chamber 20 simultaneously, and therefore shell generally makes of the steel plate with some strength.Shell comprise by cover simultaneously furnace chamber 20 above and the top panel 11 of two sides, protection base plate 13 below, form the front panel 15 before furnace chamber 20 and protect the rear board 17 at furnace chamber 20 back side.Furnace chamber 20 is spaces of the cooking things such as cooking food, is made up of, both can has put into food from the opening front of furnace chamber 20 and take out the food after the cooking, be provided with the barbecue tube 21 for baking food on the top of furnace chamber the tetragonal chest of front openings.There is certain space the right side side of furnace chamber 20, and this space is the electricity storage chamber 30 for arranging electronic unit, and electricity storage chamber 30 inside is provided with multiple electronic units such as transformer 31, magnetron 33, capacitor 37.Control panel assembly 26 is provided with before electricity storage chamber 30.
In addition, the inside of electricity storage chamber 30 is provided with demarcation strip 39 between transformer 31 and radiator fan 35.Transformer 31, radiator fan 35, capacitor 37 and demarcation strip 39 are fixed on above sub-panel.Sub-panel and base plate 13 above between at intervals.
In multiple electronic unit, transformer 31 and magnetron 33 produce the microwave irradiating furnace chamber 20 inside.Electronic unit generates heat in the process producing microwave, so when cooking food time, the temperature of electricity storage chamber 30 rises.Need to suck extraneous air, so radiator fan 35 sucks extraneous air to cool the electricity storage chamber 30 of heating.
In the temperature sensor of micro-wave oven, sensor probe is arranged on outside the furnace chamber of micro-wave oven, the infrared signal sent through food in the peephole reception furnace chamber that furnace chamber is formed also measures food temperature, temperature signal is converted to the controller that the signal of telecommunication is input to micro-wave oven; Sensor outer housing holds protection and fixation of sensor probe.
In the food thawing process of the micro-wave oven of prior art, what sensor probe adopted is the metering system of independently multiple sample point, measured the temperature treating unfrozen object by multiple sample point simultaneously, and control the course of defrosting of micro-wave oven according to certain some minimum temperature and instantaneous minimum temperature of a certain moment pallet being treated unfrozen object.By judging that the height of instantaneous minimum temperature changes the power shelves of micro-wave oven, owing to treating that on unfrozen object, each point heating degree in course of defrosting is different in the course of defrosting of reality, so the Temperature Distribution of each point is also uneven, easily there is the problem that high fire screen and low fire screen frequently switch when controlling firepower according to instantaneous minimum temperature, cause and pallet treats that the situation of thawing appearred in unfrozen object.Temperature sensor in micro-wave oven is the sense temperature when magnetron work all the time, so often can be subject to the impact of microwave noise, the judgement easily made a mistake is corresponding, has influence on the defrost result of food.In addition, because the meat of different meat is different, the effect of heating is also different, so more causes the situation complexity of course of defrosting.
Summary of the invention
The present invention provides a kind of multi-point temp being treated unfrozen object by multi-sample point measurement for solving in prior art the technical problem that exists, the initial minimum temperature of measurement and Current Temperatures and initial temperature difference is utilized to draw execution power constant, thus press food actual conditions power switched shelves, guarantee that object can obtain the defreezing method that optimum solution freezes the micro-wave oven of effect.
The technical scheme that the present invention takes for the technical problem existed in solution prior art is:
The defreezing method of micro-wave oven of the present invention, wherein the sensor probe of micro-wave oven adopts multiple sample point to measure food temperature simultaneously, comprises the following steps: the hardware such as temperature sensor, controller initializes; The shape size and position of tray of microwave oven being treated thawed foodstuff is measured by the multi-sample point of sensor probe; Measure food temperature by sensor probe, and compare the initial minimum temperature drawing food; Set basic operate power and power shelves according to the initial minimum temperature of food, food is thawed heating; Collection thawed foodstuff temperature per second, draws the minimum temperature of current foodstuff, show that current time minimum temperature and this power shelves heat the difference of the initial minimum temperature of the food before running by comparing; Draw execution power constant by the minimum temperature constant determined by initial minimum temperature and the temperature difference constant determined by the above-mentioned temperature difference, perform power constant and the long-pending execution power being subsequent time of current basic operate power; Constantly changing execution power according to food temperature situation is that heat foods is until current power shelves complete; Magnetron break-off, the minimum temperature of temperature sensor Resurvey current foodstuff is as new initial minimum temperature, redefine new basic operate power and power shelves, in new power shelves, continue respective change execution power is heat foods, subsequent power shelves are entered again after these power shelves complete, Repeat-heating step, until food reaches the requirement of thawing, has been thawed.
The present invention can also adopt following technical measures:
Each sample point is arranged in one of meal tray diametrically.
Temperature sensor is started working, and is treated the multi-point temp of unfrozen object by multiple sample point measurement, and the measurement result not covering or do not cover completely the sample point treating unfrozen object does not possess representativeness, rejected.
When each power shelves are started working, according to minimum temperature Tmin1, the Tmin2 of the object that temperature sensor measurement goes out ... the temperature range at place sets the basic operate power of now corresponding micro-wave oven, and basic operate power is in the scope included by corresponding power shelves.
Based on the interval of power shelves, the numerical value of operate power fluctuates 3-7%.
Perform power constant by long-pending, the current minimum temperature of the initial minimum temperature of these power shelves and minimum temperature constant and initial minimum temperature difference and temperature difference constant amass and form.
Micro-wave oven has multiple power shelves thawing in heating process, treats that the turn-over step of thawed foodstuff is arranged between two adjacent power shelves.
The advantage that the present invention has and good effect are:
In the defreezing method of micro-wave oven of the present invention, the sensor probe of micro-wave oven adopts multiple sample point to measure food temperature simultaneously, each sample point is arranged in one of meal tray diametrically, the as far as possible many sample points of sensor probe are all dropped on food, guarantees that the feedback temperature difference of temperature sensor is in acceptable error range.The sample point covered completely on food is more, and on food, the temperature distribution state of each point just can obtain more all sidedly, also more close to the actual state of heat foods, thus controls accurately heating process.In the course of defrosting of micro-wave oven, by the initial minimum temperature to food of temperature sensor before the power shelves of each correspondence start, determine basic operate power and corresponding power shelves simultaneously, thaw in the process of operation at magnetron, the execution power of magnetron is constantly adjusted again by the minimum temperature of current time and the difference of initial minimum temperature, the power moment of magnetron is constantly changed with the actual conditions of thawed foodstuff, the timely conversion of multiple power shelves is utilized to alleviate foodstuff surface and inner temperature contrast, the firepower of timely switching magnetron, thus avoid the mistake of food to thaw.Before each power shelves bring into operation, temperature sensor gathers the minimum temperature of food as initial minimum temperature, thawing, operating per moment minimum temperature all contrasts with initial minimum temperature, perform power to be determined by initial minimum temperature and current minimum temperature simultaneously, the departure of micro-wave oven control algolithm to different meat and different body of heater can be reduced, improve the stability of a system, be also conducive to reducing the production cost adopting high-performance temperature sensor.Directly completed by one-time action and thaw, in thawing, at any time adaptive adjustment is carried out to thaw power and the thawing time of micro-wave oven.
Accompanying drawing explanation
Fig. 1 is the structural representation of micro-wave oven;
Fig. 2 is the flow chart of the defreezing method of micro-wave oven of the present invention.
Detailed description of the invention
Referring to drawings and Examples, the present invention is described in detail:
Fig. 2 is the flow chart of the defreezing method of micro-wave oven of the present invention.
As shown in Figure 2, the defreezing method of micro-wave oven of the present invention, wherein the sensor probe of micro-wave oven adopts multiple sample point to measure food temperature simultaneously, and each sample point is arranged in one of meal tray diametrically.The hardware such as temperature sensor, controller when starting that thaws initializes; Sensor is started working, measured the temperature of residing pallet diametrically each point by multiple sample point simultaneously, and the sample point number dropped on object is judged according to the temperature contrast between each point, the measurement result not covering or do not cover completely the sample point of object does not possess representativeness, is rejected, record position and the temperature information of each sample point now covered completely on object, be defined as 0 ° of measurement result; When pallet turns over 5 °, temperature sensor measures the temperature of now pallet diametrically each point by multiple sample point simultaneously, and the sample point number dropped on object is judged according to the temperature contrast between each point, the measurement result not covering or do not cover completely the sample point of object does not possess representativeness, is rejected, record position and the temperature information of each sample point now covered completely on object, be defined as 5 ° of measurement results; After this record in the process rotated a circle at pallet position and the temperature information of each sample point often turning over 5 ° successively, thus draw the temperature distribution state of target object and the shape of object and size; When pallet complete 360 ° of rotations get back to 0 ° of original position and start second week rotate time, directly call sample point position during first week 0 ° of position, do not consider all number of sampling certificates rejected originally, thus measured the shape size and position of tray of microwave oven being treated thawed foodstuff by the multi-sample point of sensor probe.
Start the work of the first power shelves at magnetron before, measure food temperature by each sample point of sensor probe, and compare the minimum temperature drawing food, this minimum temperature is denoted as initial minimum temperature Tmin1, set basic operate power Plbase1 and power shelves according to the initial minimum temperature of food, start to thaw heating to food according to basic operate power, in the heating process of food, temperature sensor all gathers the temperature of thawed foodstuff each point in each second, and each temperature is compared, draw the minimum temperature of current foodstuff, by relatively showing that current time minimum temperature and the first power shelves heat the difference of the initial minimum temperature Tmin1 of the food before running, this difference is exactly food minimum temperature variable quantity during this period of time, and this temperature gap is denoted as Δ T, drawn by the minimum temperature constant K11 determined by initial minimum temperature Tmin1 and the temperature difference constant K12 determined by the above-mentioned temperature difference and perform power constant K1, perform power constant K1 by long-pending, the current minimum temperature of the initial minimum temperature Tmin1 of the first power shelves and minimum temperature constant K11 and initial minimum temperature difference DELTA T and temperature difference constant K12 amass and form, i.e. K1=Tmin1 × K11+ Δ T × K12, perform the long-pending execution power P 1 being subsequent time of power constant K1 and current basic operate power Plbase1, i.e. P1=Plbase1 × K1, execution power P 1 is constantly changed for heat foods is until the first power shelves complete according to the food temperature situation that sensor obtains, after first power shelves complete, magnetron break-off, the minimum temperature of temperature sensor Resurvey current foodstuff is as the initial minimum temperature Tmin2 of the second new power shelves, drawn by the minimum temperature constant k2 1 determined by initial minimum temperature Tmin2 and the temperature difference constant k2 2 determined by the above-mentioned temperature difference and perform power constant K2, perform power constant K2 to be amassed with minimum temperature constant k2 1 is by the initial minimum temperature Tmin2 of the second power shelves, current minimum temperature and initial minimum temperature difference DELTA T and temperature difference constant k2 2 long-pending and forming, redefine new basic operate power Plbase2 and power shelves, in new power shelves, continue respective change perform power P 1 for heat foods, repeat heating, temperature judges to switch with firepower, after the usual heating performing the second power shelves is thawed, need to carry out turn-over process to heat food.
After food turn-over to be heated, enter the job step of the 3rd power shelves, measure the food temperature after turn-over by each sample point of sensor probe, and compare the minimum temperature drawing food, this minimum temperature is denoted as initial minimum temperature Tmin3, set basic operate power Plbase3 and power shelves according to the initial minimum temperature of food, start to thaw heating to food according to basic operate power, in the heating process of food, temperature sensor is in the temperature all gathering thawed foodstuff each point per second, and each temperature is compared, draw the minimum temperature of current foodstuff, by relatively showing that current time minimum temperature and the 3rd power shelves heat the difference of the initial minimum temperature Tmin3 of the food before running, this difference is exactly food minimum temperature variable quantity during this period of time, and this temperature gap is denoted as Δ T, drawn by the minimum temperature constant K31 determined by initial minimum temperature Tmin3 and the temperature difference constant K32 determined by the above-mentioned temperature difference and perform power constant K3, perform power constant K3 by long-pending, the current minimum temperature of the initial minimum temperature Tmin3 of the 3rd power shelves and minimum temperature constant K31 and initial minimum temperature difference DELTA T and temperature difference constant K32 amass and form, i.e. K3=Tmin3 × K31+ Δ T × K32, perform the long-pending execution power P 1 being subsequent time of power constant K3 and current basic operate power Plbase1, i.e. P1=Plbase3 × K3, execution power P 1 is constantly changed for heat foods is until the 3rd power shelves complete according to the food temperature situation that sensor obtains, after 3rd power shelves complete, magnetron break-off, the minimum temperature of temperature sensor Resurvey current foodstuff is as the initial minimum temperature Tmin4 of the 4th new power shelves, drawn by the minimum temperature constant K41 determined by initial minimum temperature Tmin4 and the temperature difference constant K42 determined by the above-mentioned temperature difference and perform power constant K4, perform power constant K4 long-pending by the initial minimum temperature Tmin4 of the second power shelves and minimum temperature constant K41, current minimum temperature and initial minimum temperature difference DELTA T and temperature difference constant K42 long-pending and forming, redefine new basic operate power Plbase4 and power shelves, in new power shelves, continue respective change perform power P 1 for heat foods, repeat heating, temperature judges to switch with firepower, until treat that the heating of thawing of unfrozen object completes, the end-of-job of micro-wave oven.
When each power shelves are started working, according to minimum temperature Tmin1, the Tmin2 of the object that temperature sensor measurement goes out ... the temperature range at place sets the basic operate power of now corresponding micro-wave oven, and basic operate power is in the scope included by corresponding power shelves.With capacity operation for 100%, based on the interval of power shelves, the numerical value of operate power fluctuates 5%, all belongs to corresponding power shelves within basic operate power ± 5% scope.If first foundation operate power is flat-out 80%, then the first power shelves are 75-85%, second basic operate power is 60%, then the second power shelves are 55-65%, 3rd basic operate power is 40%, then the 3rd power shelves are 35-45%, and the 4th basic operate power is 10%, then the 4th power shelves are 5-15%.
Micro-wave oven has multiple power shelves thawing in heating process, treats that the turn-over step of thawed foodstuff is arranged between two adjacent power shelves.Often kind of power shelves and power shelves all have the fixing minimum time of implementation, even if minimum temperature changes enter into different temperature ranges, also after completing the current ongoing minimum time of implementation, just will can change to different power grades.
Magnetron is operationally timely according to execution power change duty, if when magnetron receives the control signal reducing power within a certain cycle of operation, its actual operate power has exceeded the numerical value performing power, then stop the operation of this work period immediately, and in the next cycle of operation, reduce the numerical value performing power, to recompense to the power in this cycle is excessive.On the contrary, if receive the signal needing increasing power at the end of a certain work period, and when current operating cycle cannot provide enough magnetron working times, then improve in next cycle and perform power and propose to compensate to the underpower in this cycle.
In the defreezing method of micro-wave oven of the present invention, the sensor probe of micro-wave oven adopts multiple sample point to measure food temperature simultaneously, each sample point is arranged in one of meal tray diametrically, the as far as possible many sample points of sensor probe are all dropped on food, guarantees that the feedback temperature difference of temperature sensor is in acceptable error range.The sample point covered completely on food is more, and on food, the temperature distribution state of each point just can obtain more all sidedly, also more close to the actual state of heat foods, thus controls accurately heating process.In the course of defrosting of micro-wave oven, by the initial minimum temperature to food of temperature sensor before the power shelves of each correspondence start, determine basic operate power and corresponding power shelves simultaneously, thaw in the process of operation at magnetron, the execution power of magnetron is constantly adjusted again by the minimum temperature of current time and the difference of initial minimum temperature, the power moment of magnetron is constantly changed with the actual conditions of thawed foodstuff, the timely conversion of multiple power shelves is utilized to alleviate foodstuff surface and inner temperature contrast, the firepower of timely switching magnetron, thus avoid the mistake of food to thaw.Before each power shelves bring into operation, temperature sensor gathers the minimum temperature of food as initial minimum temperature, thawing, operating per moment minimum temperature all contrasts with initial minimum temperature, perform power to be determined by initial minimum temperature and current minimum temperature simultaneously, the departure of micro-wave oven control algolithm to different meat and different body of heater can be reduced, improve the stability of a system, be also conducive to reducing the production cost adopting high-performance temperature sensor.Directly completed by one-time action and thaw, in thawing, at any time adaptive adjustment is carried out to thaw power and the thawing time of micro-wave oven.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention with preferred embodiment openly as above, but, and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (7)
1. a defreezing method for micro-wave oven, wherein the sensor probe of micro-wave oven adopts multiple sample point to measure food temperature simultaneously, it is characterized in that comprising the following steps: temperature sensor, controller hardware initialize; The shape size and position of tray of microwave oven being treated thawed foodstuff is measured by the multi-sample point of sensor probe; Measure food temperature by sensor probe, and compare the initial minimum temperature drawing food; Set basic operate power and power shelves according to the initial minimum temperature of food, food is thawed heating; Collection thawed foodstuff temperature per second, draws the minimum temperature of current foodstuff, show that current time minimum temperature and this power shelves heat the difference of the initial minimum temperature of the food before running by comparing; Constantly changing execution power according to food temperature situation is that heat foods is until current power shelves complete; Magnetron break-off, the minimum temperature of temperature sensor Resurvey current foodstuff is as new initial minimum temperature, redefine new basic operate power and power shelves, in new power shelves, continue respective change execution power is heat foods, subsequent power shelves are entered again after these power shelves complete, Repeat-heating step, until food reaches the requirement of thawing, has been thawed; Micro-wave oven has multiple power shelves thawing in heating process, treats that the turn-over step of thawed foodstuff is arranged between two adjacent power shelves; Often kind of power shelves and power shelves all have the fixing minimum time of implementation, even if minimum temperature changes enter into different temperature ranges, also after completing the current ongoing minimum time of implementation, just will can change to different power grades.
2. the defreezing method of micro-wave oven according to claim 1, it is characterized in that: by the minimum temperature constant determined by initial minimum temperature with by collection thawed foodstuff temperature per second, draw the minimum temperature of current foodstuff, showing that the temperature difference constant that the difference that current time minimum temperature and this power shelves heat the initial minimum temperature of the food before running is determined draws execution power constant by comparing, performing power constant and the long-pending execution power being subsequent time of current basic operate power.
3. the defreezing method of micro-wave oven according to claim 1, is characterized in that: each sample point is arranged in one of meal tray diametrically.
4. the defreezing method of the micro-wave oven according to Claims 2 or 3, it is characterized in that: temperature sensor is started working, treated the multi-point temp of unfrozen object by multiple sample point measurement, the measurement result not covering or do not cover completely the sample point treating unfrozen object does not possess representativeness, is rejected.
5. the defreezing method of micro-wave oven according to claim 1, it is characterized in that: when each power shelves are started working, according to minimum temperature Tmin1, the Tmin2 of the object that temperature sensor measurement goes out ... the temperature range at place sets the basic operate power of now corresponding micro-wave oven, and basic operate power is in the scope included by corresponding power shelves.
6. the defreezing method of micro-wave oven according to claim 5, is characterized in that: based on the interval of power shelves, the numerical value of operate power fluctuates 3-7%.
7. the defreezing method of micro-wave oven according to claim 1, is characterized in that: perform power constant by long-pending, the current minimum temperature of the initial minimum temperature of these power shelves and minimum temperature constant and initial minimum temperature difference and temperature difference constant amass and form.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010156692.0A CN102235693B (en) | 2010-04-27 | 2010-04-27 | Defrosting method of microwave oven |
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| CN201010156692.0A CN102235693B (en) | 2010-04-27 | 2010-04-27 | Defrosting method of microwave oven |
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| CN102235693A CN102235693A (en) | 2011-11-09 |
| CN102235693B true CN102235693B (en) | 2015-06-10 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106305968A (en) * | 2016-08-25 | 2017-01-11 | 郑州峰泰纳米材料有限公司 | Microwave unfreezing method for frozen foods |
| CN107883641A (en) * | 2016-09-30 | 2018-04-06 | 九阳股份有限公司 | The quick effect nutrient defreezing method and refrigerator of a kind of chilled meat |
| CN109000405B (en) | 2017-06-06 | 2020-06-23 | 青岛海尔股份有限公司 | Refrigerator with a door |
| CN109000397B (en) * | 2017-06-06 | 2020-06-23 | 青岛海尔股份有限公司 | Thawing method for thawing device |
| CN108644827A (en) * | 2018-05-21 | 2018-10-12 | 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 |
| CN110649792A (en) * | 2019-08-29 | 2020-01-03 | 合肥博雷电气有限公司 | Modular microwave power supply |
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| US4525615A (en) * | 1984-01-16 | 1985-06-25 | Amana Refrigeration, Inc. | Method for microwave defrosting |
| CN1172229A (en) * | 1996-06-11 | 1998-02-04 | Lg电子株式会社 | Microwave oven equipped with thermopile sensor and thawing method using the same |
| CN1280275A (en) * | 1999-07-12 | 2001-01-17 | 三星电子株式会社 | Defreezing method of microwave oven using infrared sensor |
| CN1309265A (en) * | 2000-02-14 | 2001-08-22 | 东芝株式会社 | Microwave oven |
| CN1704671A (en) * | 2004-05-27 | 2005-12-07 | 乐金电子(天津)电器有限公司 | Microwave oven control method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525615A (en) * | 1984-01-16 | 1985-06-25 | Amana Refrigeration, Inc. | Method for microwave defrosting |
| CN1172229A (en) * | 1996-06-11 | 1998-02-04 | Lg电子株式会社 | Microwave oven equipped with thermopile sensor and thawing method using the same |
| CN1280275A (en) * | 1999-07-12 | 2001-01-17 | 三星电子株式会社 | Defreezing method of microwave oven using infrared sensor |
| CN1309265A (en) * | 2000-02-14 | 2001-08-22 | 东芝株式会社 | Microwave oven |
| CN1704671A (en) * | 2004-05-27 | 2005-12-07 | 乐金电子(天津)电器有限公司 | Microwave oven control method |
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