CN105276640A - Control method for microwave oven and microwave oven - Google Patents

Control method for microwave oven and microwave oven Download PDF

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Publication number
CN105276640A
CN105276640A CN201510745277.1A CN201510745277A CN105276640A CN 105276640 A CN105276640 A CN 105276640A CN 201510745277 A CN201510745277 A CN 201510745277A CN 105276640 A CN105276640 A CN 105276640A
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micro
wave oven
power
operating
microwave
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CN105276640B (en
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张斐娜
孙宁
栾春
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Midea Group Co Ltd
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
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Midea Group Co Ltd
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
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Abstract

The invention discloses a control method for a microwave oven and the microwave oven. The control method for the microwave oven includes the steps that the microwave oven is started at first power to carry out microwave heating; in the heating process of the microwave oven, the work frequency and the work phase of the microwave oven are adjusted randomly or according to preset rules to obtain the adjusted work frequency and the adjusted work phase; according to the adjusted work frequency and the adjusted work phase, the return loss value of the microwave oven at the first power is calculated; whether the return loss value is larger than a preset loss threshold is judged, and when the return loss value is larger than the preset loss threshold, the work frequency and the work phase which correspond to the return loss value larger than the preset loss threshold are obtained, so that a target work frequency and a target work phase are obtained; and the work power of the microwave oven is adjusted to be second power, and the microwave oven is controlled to carry out microwave cooking at the target work frequency and the target work phase. By means of the control method and the microwave oven, microwave sources can be effectively protected, and the cooking effect of the microwave oven is improved.

Description

For control method and the micro-wave oven of micro-wave oven
Technical field
The present invention relates to micro-wave oven technical field, particularly relate to a kind of control method for micro-wave oven and micro-wave oven.
Background technology
Micro-wave oven is that one conveniently cooks firing equipment, it is widely used in daily life, if user needs to cook puffed rice, under this culinary art pattern, fast cooking is at short notice needed to complete, to avoid puffed rice portion retracts, therefore, use microwave oven cooking puffed rice time, adopt high-power culinary art, but due to puffed rice be underload, absorption microwave that can not be good, can reflect larger microwave power, the microwave power of reflection can reduce the power of microwave source, even damages microwave source.
Therefore; need to obtain micro-wave oven in the process of culinary art puffed rice; the operating frequency of the optimum that the microwave power of reflection can be made minimum and operating phase; or; the operating phase combination of the optimum that the microwave power of reflection can be made minimum; micro-wave oven is made to be operated in operating frequency and the operating phase of this optimum, or under the operating phase combination of optimum, to protect microwave source.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, one object of the present invention is to propose a kind of control method for micro-wave oven, can available protecting microwave source, promotes the culinary art effect of micro-wave oven.
Another object of the present invention is to propose a kind of control method for micro-wave oven.
Another object of the present invention is to propose a kind of micro-wave oven.
For achieving the above object, the control method for micro-wave oven that first aspect present invention embodiment proposes, comprising: open micro-wave oven with the first power and carry out heating using microwave; Carry out in heating process at described micro-wave oven, random or adjust operating frequency and the operating phase of described micro-wave oven according to default rule, to obtain the operating phase after the operating frequency after adjustment and adjustment; The return loss value of described micro-wave oven under described first power is calculated according to the operating phase after the operating frequency after described adjustment and described adjustment; Judge whether described return loss value is greater than default loss threshold value, and when being greater than described default loss threshold value, operating frequency corresponding to the return loss value of default loss threshold value and operating phase is greater than, to obtain target operating frequency and target operation phase place described in acquisition; The operating power of described micro-wave oven is adjusted to the second power, and controls described micro-wave oven and carry out microwave cooking with described target operating frequency and described target operation phase place.
The control method for micro-wave oven that first aspect present invention embodiment proposes; heating using microwave is carried out by opening micro-wave oven with the first power; and carry out in heating process at micro-wave oven; random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase; to obtain target operating frequency and target operation phase place; the operating power of micro-wave oven is adjusted to the second power; and control micro-wave oven and carry out microwave cooking with target operating frequency and target operation phase place; can available protecting microwave source, promote the culinary art effect of micro-wave oven.
For achieving the above object, the control method for micro-wave oven that second aspect present invention embodiment proposes, comprising: open micro-wave oven with the first power and carry out heating using microwave; Random or adjust the operating phase of each microwave source in described micro-wave oven according to default rule, to obtain the operating phase combination of microwave source; In the working frequency range of described micro-wave oven, obtain often group operating phase and be combined in the average return loss value in full frequency band; Judge whether described average return loss value meets pre-conditioned, and meet described pre-conditioned time, meet described in acquisition pre-conditioned average return loss value corresponding operating phase combination, to obtain target operation phase combination; The operating power of described micro-wave oven is adjusted to the second power, and controls described micro-wave oven and in described working frequency range, carry out microwave swept frequency culinary art with described target operation phase combination.
The control method for micro-wave oven that second aspect present invention embodiment proposes; heating using microwave is carried out by opening micro-wave oven with the first power; random or according to the operating phase of each microwave source in default rule adjustment micro-wave oven; to obtain target operation phase combination; the operating power of micro-wave oven is adjusted to the second power; and control micro-wave oven and in working frequency range, carry out microwave swept frequency culinary art with target operation phase combination, can available protecting microwave source, promote the culinary art effect of micro-wave oven.
For achieving the above object, the micro-wave oven that third aspect present invention embodiment proposes, comprising: cooking chamber; Base plate; Housing case; Be arranged on the guidance panel on described cooking chamber, described guidance panel is for receiving the culinary art instruction of user; The microwave source be connected with described cooking chamber, described microwave signal for generation of microwave signal, and is passed to circulator by described microwave source; The described circulator be connected with described microwave source, reflection power and described microwave source for receiving described microwave signal, and are isolated by described circulator, with avoid described microwave source due to reflection power excessive and burnt; Be arranged on the feedthrough on described housing case, the microwave signal that described feedthrough sends for receiving described circulator, and by cooking chamber described in described microwave signal feed-in; The temperature protection parts be connected with described circulator, described temperature protection parts for the temperature of the temperature and described microwave source that detect ohmic load in described circulator, to obtain testing result; The controller be connected with described cooking chamber; described controller is used for controlling described micro-wave oven according to the culinary art instruction of described user and cooks; and adjust the duty of described microwave source according to the testing result of described temperature protection parts, with the interference avoiding described micro-wave oven to be subject to reflection power.
The micro-wave oven that third aspect present invention embodiment proposes, by circulator, reflection power and microwave source are isolated, with avoid microwave source due to reflection power excessive and burnt, the temperature of ohmic load and the temperature of microwave source in circulator is detected by temperature protection parts, to obtain testing result, control micro-wave oven by controller according to the culinary art instruction of user to cook, and the duty of microwave source is adjusted according to the testing result of temperature protection parts, with the interference avoiding micro-wave oven to be subject to reflection power, can available protecting microwave source, promote the culinary art effect of micro-wave oven.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the schematic flow sheet of the control method for micro-wave oven that one embodiment of the invention proposes;
Fig. 2 is the schematic flow sheet of the control method for micro-wave oven that another embodiment of the present invention proposes;
Fig. 3 is the schematic flow sheet of the control method for micro-wave oven that another embodiment of the present invention proposes;
Fig. 4 is the schematic flow sheet of the control method for micro-wave oven that another embodiment of the present invention proposes;
Fig. 5 is the structural representation of the micro-wave oven that another embodiment of the present invention proposes.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
Fig. 1 is the schematic flow sheet of the control method for micro-wave oven that one embodiment of the invention proposes, and the method comprises:
S11: open micro-wave oven with the first power and carry out heating using microwave.
Wherein, the first power is small-power, such as 20W.
In the present invention, culinary art puffed rice needs fast cooking at short notice to complete, to avoid puffed rice portion retracts, when using microwave oven cooking puffed rice, adopt high-power culinary art, but because puffed rice is underload, absorption microwave that can not be good, larger microwave power can be reflected, the microwave power of reflection can reduce the power of microwave source, even damage microwave source, therefore, need to obtain micro-wave oven in the process of culinary art puffed rice, the operating frequency of the optimum that the microwave power of reflection can be made minimum and operating phase, under the operating frequency making micro-wave oven be operated in this optimum and operating phase, to protect microwave source.
Wherein, microwave source is magnetron such as, or semiconductor microactuator wave source.
In the present invention, owing to needing the operating power regulating micro-wave oven, therefore, the micro-wave oven with semiconductor microactuator wave source is selected to carry out the algorithm design of microwave cooking.
Such as, first puffed rice to be cooked can be put into cooking chamber by user, and the culinary art power arranging micro-wave oven is 20W, controls micro-wave oven and cooks.
S12: carry out in heating process at micro-wave oven, random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after adjustment and adjustment.
Wherein, operating frequency and operating phase be micro-wave oven in the course of the work, micro-wave frequency that microwave source in micro-wave oven produces and phase place, operating frequency can the microwave source in micro-wave oven can produce microwave full frequency band in change, and the phase range of microwave that microwave source produces is-180 ° to+180 °.
Default rule can such as regulate by default step-length continuously, and default step-length comprises operating frequency step-length and operating phase step-length, operating frequency step-length such as 1MHz, and operating phase step-length is such as 1 °.
Such as, user, can at random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase when controlling micro-wave oven and carrying out microwave cooking with the first power 20W, to obtain the operating frequency 2.51GHz after adjustment and the operating phase 30 ° after adjusting.
S13: calculate the return loss value of micro-wave oven under the first power according to the operating phase after the operating frequency after adjustment and adjustment.
Wherein, return loss refers to the reflected wave powers of transmission line port and the ratio of incident power, and represent with logarithmic form, unit is dB, and return loss value is the absolute value of return loss.
Return loss value is larger, and when the operating frequency after expression micro-wave oven adopts this adjustment and the operating phase after adjustment carry out microwave cooking, the microwave power of reflection is less.
Such as, user can according to the operating phase after the operating frequency after adjustment and adjustment, and the first power, calculating return loss value is 11.
S14: judge whether return loss value is greater than default loss threshold value, and when being greater than default loss threshold value, obtains operating frequency corresponding to the return loss value that is greater than default loss threshold value and operating phase, to obtain target operating frequency and target operation phase place.
Wherein, preset loss threshold value to be preset by micro-wave oven plug-in.
Presetting loss threshold value is such as 10.
Particularly, can continue random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after adjustment and adjustment, and according to the operating phase after the operating frequency after adjustment and adjustment, and the first power calculation return loss value, when a certain group according to the operating phase after the operating frequency after adjustment and adjustment, and first return loss value that calculate of power meter when being greater than default loss threshold value, when judging that micro-wave oven is cooked under operating frequency corresponding to this return loss value and operating phase, the microwave power of reflection is minimum, this operating frequency and operating phase are the target operating frequency and target operation phase place that need to obtain.
Such as, the target operating frequency got is 2.52GHz and 45 °, target operation phase place.
S15: the operating power of micro-wave oven is adjusted to the second power, and control micro-wave oven and carry out microwave cooking with target operating frequency and target operation phase place.
Wherein, the second power is full power, the maximum power value of full power for arranging in microwave oven cooking process.
Full power is 85W such as, then arranging the second power is 85W.
Such as, the target operating frequency got is 2.52GHz and 45 °, target operation phase place, then control micro-wave oven and carry out microwave cooking with full power 85W, target operating frequency for 2.52GHz and 45 °, target operation phase place, under this running parameter, the microwave power of the microwave source reflection of micro-wave oven is minimum.
In the present embodiment; heating using microwave is carried out by opening micro-wave oven with the first power; and carry out in heating process at micro-wave oven; random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase; to obtain target operating frequency and target operation phase place, the operating power of micro-wave oven is adjusted to the second power, and controls micro-wave oven and carry out microwave cooking with target operating frequency and target operation phase place; can available protecting microwave source, promote the culinary art effect of micro-wave oven.
Fig. 2 is the schematic flow sheet of the control method for micro-wave oven that another embodiment of the present invention proposes, and the method comprises:
S21: open micro-wave oven with the first power and carry out heating using microwave.
Wherein, the first power is small-power, such as 20W.
Wherein, microwave source is magnetron such as, or semiconductor microactuator wave source.
Such as, first puffed rice to be cooked can be put into cooking chamber by user, and the culinary art power arranging micro-wave oven is 20W, controls micro-wave oven and cooks.
S22: carry out in heating process at micro-wave oven, random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after adjustment and adjustment.
Wherein, operating frequency and operating phase be micro-wave oven in the course of the work, micro-wave frequency that microwave source in micro-wave oven produces and phase place, operating frequency can the microwave source in micro-wave oven can produce microwave full frequency band in change, and the phase range of microwave that microwave source produces is-180 ° to+180 °.
Default rule can such as regulate by default step-length continuously, and default step-length comprises operating frequency step-length and operating phase step-length, operating frequency step-length such as 1MHz, and operating phase step-length is such as 1 °.
Such as, user, when controlling micro-wave oven and carrying out microwave cooking with the first power 20W, can adjust operating frequency and the operating phase of micro-wave oven at random or according to presetting regularly, to obtain the operating frequency 2.51GHz after adjustment and the operating phase 30 ° after adjusting.
S23: calculate the return loss value of micro-wave oven under the first power according to the operating phase after the operating frequency after adjustment and adjustment.
Wherein, return loss refers to the reflected wave powers of transmission line port and the ratio of incident power, and represent with logarithmic form, unit is dB, and return loss value is the absolute value of return loss.
Return loss value is larger, and when the operating frequency after expression micro-wave oven adopts this adjustment and the operating phase after adjustment carry out microwave cooking, the microwave power of reflection is less.
Such as, user can according to the operating phase after the operating frequency after adjustment and adjustment, and the first power, calculating return loss value is 11.
S24: judge whether return loss value is greater than default loss threshold value, if so, then performs step S25, otherwise, repeated execution of steps S22.
Wherein, preset loss threshold value to be preset by micro-wave oven plug-in.
Presetting loss threshold value is such as 10.
Such as, when according to adjustment after operating frequency and adjustment after operating phase, and first power, calculating return loss value is 11, be greater than default loss threshold value 10, then trigger and perform step S25, if according to the operating phase after the operating frequency after adjustment and adjustment, and first power, calculating return loss value is 7, be less than default loss threshold value 10, then continue random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after adjustment and adjustment, until the return loss value calculated is greater than default loss threshold value.
S25: obtain and be greater than operating frequency corresponding to the return loss value of default loss threshold value and operating phase, to obtain target operating frequency and target operation phase place.
Particularly, can continue random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after adjustment and adjustment, and according to the operating phase after the operating frequency after adjustment and adjustment, and the first power calculation return loss value, when a certain group according to the operating phase after the operating frequency after adjustment and adjustment, and first return loss value that calculate of power meter when being greater than default loss threshold value, when judging that micro-wave oven is cooked under operating frequency corresponding to this return loss value and operating phase, the microwave power of reflection is minimum, this operating frequency and operating phase are the target operating frequency and target operation phase place that need to obtain.
Such as, the target operating frequency got is 2.52GHz and 45 °, target operation phase place.
S26: the operating power of micro-wave oven is adjusted to the second power, and control micro-wave oven and carry out microwave cooking with target operating frequency and target operation phase place.
Wherein, the second power is full power, the maximum power value of full power for arranging in microwave oven cooking process.
Full power is 85W such as, then arranging the second power is 85W.
Such as, the target operating frequency got is 2.52GHz and 45 °, target operation phase place, then control micro-wave oven and carry out microwave cooking with full power 85W, target operating frequency for 2.52GHz and 45 °, target operation phase place, under this running parameter, the microwave power of the microwave source reflection of micro-wave oven is minimum.
Alternatively, when the operating power of micro-wave oven is adjusted to the second power, synchronously enable temperature protection function and the reflection power defencive function of micro-wave oven.
Particularly; microwave signal is received by the circulator be connected with microwave source in micro-wave oven; and reflection power and microwave source are isolated; to realize reflection power defencive function, by the temperature protection parts be connected with circulator in micro-wave oven, detect the temperature of ohmic load and the temperature of microwave source in circulator; to obtain testing result; and the controller be connected with cooking chamber adjusts the duty of microwave source according to the testing result of temperature protection parts, to realize temperature protection function.
S27: the operating frequency of dynamic conditioning micro-wave oven and operating phase, to obtain the operating phase after the operating frequency after dynamic conditioning and dynamic conditioning.
Particularly, carry out in the process of microwave cooking at micro-wave oven with target operating frequency and target operation phase place, due to the change of institute's cooking food proterties, return loss value under this target operating frequency and target operation phase place may change, therefore, need operating frequency and the operating phase of dynamic conditioning micro-wave oven, under continuing making micro-wave oven be operated in the minimum operating frequency of reflected microwave power and operating phase.
S28: according to the operating frequency after dynamic conditioning and the operating phase after dynamic conditioning, upgrades target operating frequency and target operation phase place, to obtain the target operating frequency after renewal and the target operation phase place after upgrading.
Wherein, upgrade target operating frequency and target operation phase place, account for 30% of the total cooking time of micro-wave oven with the time obtained shared by the target operating frequency after renewal and the target operation phase place after upgrading.
Such as, can utilize the time of 30% of the total cooking time of micro-wave oven, the target operating frequency after Dynamic Acquisition upgrades and the target operation phase place after upgrading, utilize the time of 70% of the total cooking time of micro-wave oven, carry out microwave cooking.
S29: control micro-wave oven and carry out microwave cooking with the target operating frequency after renewal and the target operation phase place after upgrading.
Such as, Dynamic Acquisition to target operating frequency be 2.54GHz and 60 °, target operation phase place, then control micro-wave oven and carry out microwave cooking with full power 85W, target operating frequency for 2.54GHz and 60 °, target operation phase place, under running parameter in the updated, the microwave source of micro-wave oven still keeps the microwave power of reflection minimum.
In the present embodiment, heating using microwave is carried out by opening micro-wave oven with the first power, and carry out in heating process at micro-wave oven, random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, and according to the operating phase after the operating frequency after adjustment and adjustment, and first power obtain return loss value, when return loss value is greater than default loss threshold value, obtain target operating frequency and target operation phase place, when return loss value is less than default loss threshold value, continue random or according to the operating frequency of default rule adjustment micro-wave oven and operating phase, to obtain target operating frequency and target operation phase place, the operating power of micro-wave oven is adjusted to the second power, and control micro-wave oven and carry out microwave cooking with target operating frequency and target operation phase place, can available protecting microwave source, promote the culinary art effect of micro-wave oven.On the other hand; carry out in the process of microwave cooking at micro-wave oven with target operating frequency and target operation phase place; due to the change of institute's cooking food proterties; need operating frequency and the operating phase of dynamic conditioning micro-wave oven; to upgrade target operating frequency and target operation phase place; realize sustainable protection microwave source, promote the culinary art effect of micro-wave oven further.
Fig. 3 is the schematic flow sheet of the control method for micro-wave oven that another embodiment of the present invention proposes, and the method comprises:
S31: open micro-wave oven with the first power and carry out heating using microwave.
Wherein, the first power is small-power, such as 20W.
In the present invention, culinary art puffed rice needs fast cooking at short notice to complete, to avoid puffed rice portion retracts, when using microwave oven cooking puffed rice, adopt high-power culinary art, but because puffed rice is underload, absorption microwave that can not be good, larger microwave power can be reflected, the microwave power of reflection can reduce the power of microwave source, even damage microwave source, therefore, need to obtain micro-wave oven in the process of culinary art puffed rice, the operating phase combination of the optimum that the microwave power of reflection can be made minimum, under making micro-wave oven be operated in the operating phase combination of this optimum, to protect microwave source.
Wherein, microwave source is magnetron such as, or semiconductor microactuator wave source.
Such as, first puffed rice to be cooked can be put into cooking chamber by user, and the culinary art power arranging micro-wave oven is 20W, controls micro-wave oven and cooks.
S32: random or according to the operating phase of each microwave source in default rule adjustment micro-wave oven, to obtain the operating phase combination of microwave source.
It should be noted that, in the present invention, in order to make the culinary art heating effect of micro-wave oven more even, ensureing under isolation condition desirable between different feedthroughs, on the housing case of microwave oven cooking room, the feedthrough more than two can be set, the microwave source of corresponding same quantity.
In the present embodiment, it is 4 for the quantity of microwave source in micro-wave oven.
Particularly, the phase range of microwave that microwave source produces be-180 ° to+180 °, therefore, at random or can regulate the operating phase of each microwave source according to default rule, combine with the operating phase obtaining microwave source.
Default rule can such as regulate by default step-length continuously, and default step-length is specially operating phase step-length, and operating phase step-length is such as 1 °.
Such as, phase combination 1 can be: the operating phase of microwave source 1 is 20 °, the operating phase of microwave source 2 is 30 °, the operating phase of microwave source 3 is 45 °, and the operating phase of microwave source 4 is 60 °, phase combination 2 can be: the operating phase of microwave source 1 is 0 °, the operating phase of microwave source 2 is 70 °, the operating phase of microwave source 3 is 85 °, and the operating phase of microwave source 4 is 90 °.
S33: in the working frequency range of micro-wave oven, obtains often group operating phase and is combined in the average return loss value in full frequency band.
Wherein, according to the concrete model of heater element in micro-wave oven, the working frequency range of micro-wave oven permission work is different, and such as, working frequency range is 2.4GHz ~ 2.5GHz such as.
Alternatively, in the working frequency range of micro-wave oven, obtain often group operating phase and be combined in the average return loss value in full frequency band, comprising: according to default step-length, working frequency range is equidistantly divided, to select the default operating frequency of at least one; Obtain and often organize operating phase and be combined in return loss value under each default operating frequency; Average return loss value is calculated according to the return loss value under each default operating frequency.
Particularly, the return loss value of phase combination under each default operating frequency can be added, and count divided by the frequency comprised in default operating frequency, to obtain the average return loss value of this phase combination in full frequency band.
Default step-length can such as 1MHz.
Such as, take 1MHz as step-length, 2.4GHz ~ 2.5GHz is equidistantly divided, the default operating frequency got after division is 2.401GHz, 2.402GHz, 2.403GHz, 2.498GHz, 2.499GHz, 2.5GHz, obtain the return loss value of phase combination 1 under each default operating frequency, and the return loss value of phase combination 1 under each default operating frequency is added, count divided by the frequency presetting operating frequency in full frequency band, to obtain the average return loss value of phase combination 1 in full frequency band 2.4GHz ~ 2.5GHz.
S34: judge whether average return loss value meets pre-conditioned, and when meeting pre-conditioned, obtaining and meeting operating phase combination corresponding to pre-conditioned average return loss value, to obtain target operation phase combination.
Wherein, pre-conditionedly to be preset by micro-wave oven plug-in.
Pre-conditioned is such as that, in the return loss value under all default operating frequency of phase combination in full frequency band, the return loss value having the frequency of 2/3rds to count is greater than 10.
Such as, in the return loss value under all default operating frequency of phase combination 1 in full frequency band 2.4GHz ~ 2.5GHz, the return loss value having the frequency of 2/3rds to count is greater than 10, then judge that phase combination 1 is as target operation phase combination.
Alternatively, in another embodiment, as shown in Figure 4, judge average return loss value whether meet pre-conditioned after, the method also comprises:
S41: if average return loss value does not meet pre-conditioned, then continue at random or adjust according to default rule the operating phase of each microwave source in micro-wave oven, to obtain the combination of the operating phase after renewal.
Such as, in return loss value under all default operating frequency of phase combination 1 in full frequency band 2.4GHz ~ 2.5GHz, the return loss value having the frequency being less than 2/3rds to count is greater than 10, then judge that phase combination 1 does not meet pre-conditioned, then phase combination 1 can be adjusted to phase combination 2, whether meet pre-conditioned with phase combination 2.
S35: the operating power of micro-wave oven is adjusted to the second power, and control micro-wave oven and in working frequency range, carry out microwave swept frequency culinary art with target operation phase combination.
Such as, can be step-length with 1MHz, 2.4GHz ~ 2.5GHz is equidistantly divided, the default operating frequency got after division is 2.401GHz, 2.402GHz, 2.403GHz ..., 2.498GHz, 2.499GHz, 2.5GHz, frequency sweep culinary art under above-mentioned default operating frequency.
Wherein, the second power is full power, the maximum power value of full power for arranging in microwave oven cooking process.
Full power is 85W such as, then arranging the second power is 85W.
Such as, the target phase got is combined as phase combination 1: the operating phase of microwave source 1 is 20 °, the operating phase of microwave source 2 is 30 °, the operating phase of microwave source 3 is 45 °, and the operating phase of microwave source 4 is 60 °, then control micro-wave oven with full power 85W, the operating phase of microwave source 1 is 20 °, the operating phase of microwave source 2 is 30 °, the operating phase of microwave source 3 is 45 °, and the operating phase of microwave source 4 is 60 °, microwave swept frequency culinary art is carried out in 2.4GHz ~ 2.5GHz full frequency band, under this running parameter, the microwave power of the microwave source reflection of micro-wave oven is minimum.
Alternatively, when the operating power of micro-wave oven is adjusted to the second power, synchronously enable temperature protection function and the reflection power defencive function of micro-wave oven.
Particularly; microwave signal is received by the circulator be connected with microwave source in micro-wave oven; and reflection power and microwave source are isolated; to realize reflection power defencive function, by the temperature protection parts be connected with circulator in micro-wave oven, detect the temperature of ohmic load and the temperature of microwave source in circulator; to obtain testing result; and the controller be connected with cooking chamber adjusts the duty of microwave source according to the testing result of temperature protection parts, to realize temperature protection function.
In the present embodiment; heating using microwave is carried out by opening micro-wave oven with the first power; random or according to the operating phase of each microwave source in default rule adjustment micro-wave oven; to obtain target operation phase combination; the operating power of micro-wave oven is adjusted to the second power; and control micro-wave oven and in working frequency range, carry out microwave swept frequency culinary art with target operation phase combination, can available protecting microwave source, promote the culinary art effect of micro-wave oven.
Fig. 5 is the structural representation of the micro-wave oven that another embodiment of the present invention proposes, and this micro-wave oven 10 comprises cooking chamber 101; Base plate 102; Housing case 103; Be arranged on the guidance panel 104 on cooking chamber 101, guidance panel 104 is for receiving the culinary art instruction of user; The microwave source 105 be connected with cooking chamber 101, microwave signal for generation of microwave signal, and is passed to circulator 106 by microwave source 105; The circulator 106 be connected with microwave source 105, reflection power and microwave source 105 for receiving microwave signal, and are isolated by circulator 106, with avoid microwave source 105 due to reflection power excessive and burnt; Be arranged on the feedthrough 107 on housing case 103, the microwave signal that feedthrough 107 sends for receiving circulator 106, and by microwave signal feed-in cooking chamber 101; The temperature protection parts 108 be connected with circulator 106, temperature protection parts 108 for the temperature of the temperature and microwave source 105 that detect ohmic load in circulator 106, to obtain testing result; The controller 109 be connected with cooking chamber 101; controller 109 is cooked for controlling micro-wave oven 10 according to the culinary art instruction of user; according to the duty of the testing result adjustment microwave source 105 of temperature protection parts 108; damage due to high temperature to avoid the device in micro-wave oven 10; and control operating frequency, the operating power of micro-wave oven 10, and operating phase combination.
Wherein, in an embodiment of the present invention, cooking chamber 101 is main bodys of micro-wave oven 10.
Particularly, the cooking chamber 101 that user can will need the food of culinary art to put into micro-wave oven 10, the microwave produced by microwave source 105, is cooked food.
In one embodiment of the invention, micro-wave oven 10 also comprises base plate 102.
Base plate 102 is for supporting cooking chamber 101, and fixing high-tension transformer, base plate 102 is connected with housing case 103.
In one embodiment of the invention, micro-wave oven 10 also comprises housing case 103.
Particularly, housing case 103 and base plate 102 are the supporting construction of micro-wave oven 10, and housing case 103 is located at cooking chamber 101, base plate 102, microwave source 105, circulator 106, controller 109, feedthrough 107, and on temperature protection parts 108.
Housing case 103 and base plate 102, and guidance panel 104 is connected.
Housing case 103 is provided with guidance panel 104, and power line.
In one embodiment of the invention, micro-wave oven 10 also comprises the guidance panel 104 be arranged on cooking chamber 101, and guidance panel 104 is for receiving the culinary art instruction of user.
A culinary art instruction such as " heating! ".
The cooking chamber 101 that user can will need the food of culinary art to put into micro-wave oven 10, and input culinary art instruction on guidance panel 104, arrange culinary art pattern for " heating particularly! ", then micro-wave oven 10 starts corresponding culinary art pattern, to cook food according to the culinary art instruction of user.
In one embodiment of the invention, micro-wave oven 10 also comprises the microwave source 105 be connected with cooking chamber 101, and microwave signal for generation of microwave signal, and is passed to circulator 106 by microwave source 105.
Wherein, microwave source 105 such as magnetron, or semiconductor microactuator wave source 105, magnetron is used to the electron tube producing microwave energy, be in fact the diode being placed in stationary magnetic field, in pipe, electronics is under the control of orthogonal stationary magnetic field and steady electric field, interacts with electromagnetic field of high frequency, become microwave energy obtaining energy conversion from steady electric field, thus reach the object producing microwave energy.
Microwave is a kind of high-frequency electromagnetic wave.
In one embodiment of the invention, micro-wave oven 10 also comprises the circulator 106 be connected with microwave source 105, and reflection power and microwave source 105 for receiving microwave signal, and are isolated by circulator 106, with avoid microwave source 105 due to reflection power excessive and burnt.
Wherein, circulator 106 is for realizing reflection power defencive function.
Circulator 106 comprises 1 port, 2 ports, and 3 ports, and wherein, 1 port is microwave signal input port, and 2 ports are microwave signal delivery outlet, and 3 ports are isolated port.
Particularly, 1 port of circulator can be connected with microwave source 105 delivery outlet, the high-intensity magnetic field of circulator inside guides microwave signal to export from 2 ports, when 2 ports well mate, the loss of microwave signal will be very little, 2 ports connect the feedthroughs 107 such as antenna, microwave signal feed-in cooking chamber 101 the most at last, with cooking food, 3 ports can connect 50 Ohmic resistance load R, ohmic load R can optimize mating of 2 ports and 1 port, to reduce the loss of microwave signal, ohmic load R also by the power of reflection and can isolate with microwave source 105, damage to make microwave source 105 avoid the power owing to reflecting excessive.
In one embodiment of the invention, micro-wave oven 10 also comprises the feedthrough 107 be arranged on housing case 103, the microwave signal that feedthrough 107 sends for receiving circulator 106, and by microwave signal feed-in cooking chamber 101.
In the present invention, in order to make the culinary art heating effect of micro-wave oven 10 more even, ensureing under isolation condition desirable between different feedthroughs 107, can on the housing case 103 of micro-wave oven 10 cooking chamber 101, feedthrough 107 more than two is set, the microwave source 105 of corresponding same quantity.
Wherein, desirable isolation condition is such as the isolation between feedthrough 107 is less than-15dB.
In one embodiment of the invention, micro-wave oven 10 also comprises the temperature protection parts 108 be connected with circulator 106, temperature protection parts 108 for the temperature of the temperature and microwave source 105 that detect ohmic load in circulator 106, to obtain testing result.
Wherein, temperature protection parts 108 are for detecting the temperature of ohmic load, and the temperature of the power amplifying device of detection microwave source 105, to obtain testing result.
Power amplifying device is such as LDMOS or GaN.
Particularly; if the power of reflection is excessive; meeting burn-out resistance load R; now; the reflection power defencive function of circulator 106 lost efficacy; therefore; need set temperature guard block 108 on 50 Ohmic resistance load R, to detect the temperature of ohmic load in real time, on the other hand; when the temperature of microwave source 105 is too high; its operating power, efficiency reduce, and therefore, need set temperature guard block 108 on the power amplifying device of microwave source 105; to detect the temperature of microwave source 105 in real time, obtain testing result.
In one embodiment of the invention; micro-wave oven 10 also comprises the controller 109 be connected with cooking chamber 101; controller 109 is cooked for controlling micro-wave oven 10 according to the culinary art instruction of user; according to the duty of the testing result adjustment microwave source 105 of temperature protection parts 108; damage due to high temperature to avoid the device in micro-wave oven 10; and control operating frequency, the operating power of micro-wave oven 10, and operating phase combination.
Particularly; when temperature protection parts 108 detect that the temperature of ohmic load R reaches the first preset temperature threshold value; controller 109 regulates operating frequency, the operating phase of microwave source 105; and operating power; microwave cooking is carried out with the lower-powered duty of reflection to make micro-wave oven 10; or, also in the case of necessary, the corresponding microwave source 105 of ohmic load R that temperature reaches the first preset temperature threshold value can be turned off.
Wherein, the first preset temperature threshold value is fixed according to the concrete model of the ohmic load of coupling, such as, be 105 DEG C.
Further; when the temperature of the power amplifying device that temperature protection parts 108 detect in microwave source 105 reaches the second preset temperature threshold value; controller 109 regulates operating frequency, the operating phase of microwave source 105; and operating power; microwave cooking is carried out with the lower-powered duty of reflection to make micro-wave oven 10; or, also in the case of necessary, the microwave source 105 that temperature reaches the second preset temperature threshold value can be turned off.
Wherein, the second preset temperature threshold value deducts temperature margin setting according to the shell temperature of LDMOS or GaN, such as, be 110 DEG C.
In the present embodiment; by circulator, reflection power and microwave source are isolated; with avoid microwave source due to reflection power excessive and burnt; the temperature of ohmic load and the temperature of microwave source in circulator is detected by temperature protection parts; to obtain testing result; control micro-wave oven by controller according to the culinary art instruction of user to cook; and the duty of microwave source is adjusted according to the testing result of temperature protection parts; with the interference avoiding micro-wave oven to be subject to reflection power; can available protecting microwave source, promote the culinary art effect of micro-wave oven.
It should be noted that, in describing the invention, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.In addition, in describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.

Claims (11)

1. for a control method for micro-wave oven, it is characterized in that, comprise the following steps:
Open micro-wave oven with the first power and carry out heating using microwave;
Carry out in heating process at described micro-wave oven, random or adjust operating frequency and the operating phase of described micro-wave oven according to default rule, to obtain the operating phase after the operating frequency after adjustment and adjustment;
The return loss value of described micro-wave oven under described first power is calculated according to the operating phase after the operating frequency after described adjustment and described adjustment;
Judge whether described return loss value is greater than default loss threshold value, and when being greater than described default loss threshold value, operating frequency corresponding to the return loss value of default loss threshold value and operating phase is greater than, to obtain target operating frequency and target operation phase place described in acquisition;
The operating power of described micro-wave oven is adjusted to the second power, and controls described micro-wave oven and carry out microwave cooking with described target operating frequency and described target operation phase place.
2., as claimed in claim 1 for the control method of micro-wave oven, it is characterized in that, described judge whether described return loss value is greater than default loss threshold value after, also comprise:
If described return loss value is not more than described default loss threshold value, then continue operating frequency and the operating phase of the described micro-wave oven of adjustment, to obtain the operating phase after the operating frequency after adjustment and adjustment.
3., as claimed in claim 2 for the control method of micro-wave oven, it is characterized in that, described second power is full power, and described method also comprises:
Carry out in the process of heating using microwave at described micro-wave oven with described second power, the operating frequency of micro-wave oven described in dynamic conditioning and operating phase, to obtain the operating phase after the operating frequency after dynamic conditioning and dynamic conditioning;
According to the operating phase after the operating frequency after described dynamic conditioning and described dynamic conditioning, upgrade target operating frequency and target operation phase place, to obtain the target operating frequency after renewal and the target operation phase place after upgrading;
Control described micro-wave oven and carry out microwave cooking with the target operation phase place after the target operating frequency after described renewal and described renewal.
4. as claimed in claim 3 for the control method of micro-wave oven, it is characterized in that, described renewal target operating frequency and target operation phase place, account for 30% of the total cooking time of described micro-wave oven with the time obtained shared by the target operating frequency after renewal and the target operation phase place after upgrading.
5., as claimed in claim 3 for the control method of micro-wave oven, it is characterized in that, described method also comprises:
When the operating power of described micro-wave oven is adjusted to described second power, synchronously enable temperature protection function and the reflection power defencive function of described micro-wave oven.
6. for a control method for micro-wave oven, it is characterized in that, comprise the following steps:
Open micro-wave oven with the first power and carry out heating using microwave;
Random or adjust the operating phase of each microwave source in described micro-wave oven according to default rule, to obtain the operating phase combination of microwave source;
In the working frequency range of described micro-wave oven, obtain often group operating phase and be combined in the average return loss value in full frequency band;
Judge whether described average return loss value meets pre-conditioned, and meet described pre-conditioned time, meet described in acquisition pre-conditioned average return loss value corresponding operating phase combination, to obtain target operation phase combination;
The operating power of described micro-wave oven is adjusted to the second power, and controls described micro-wave oven and in described working frequency range, carry out microwave swept frequency culinary art with described target operation phase combination.
7., as claimed in claim 6 for the control method of micro-wave oven, it is characterized in that, described judge described average return loss value whether meet pre-conditioned after, also comprise:
If described average return loss value does not meet described pre-conditioned, then continue the operating phase of each microwave source in the described micro-wave oven of adjustment, to obtain the combination of the operating phase after renewal.
8., as claimed in claim 7 for the control method of micro-wave oven, it is characterized in that, described in the working frequency range of described micro-wave oven, obtain often group operating phase and be combined in the average return loss value in full frequency band, comprising:
According to default step-length, described working frequency range is equidistantly divided, to select the default operating frequency of at least one;
Obtain described operating phase of often organizing and be combined in return loss value under each default operating frequency;
Described average return loss value is calculated according to the return loss value under described each default operating frequency.
9., as claimed in claim 8 for the control method of micro-wave oven, it is characterized in that, described method also comprises:
When the operating power of described micro-wave oven is adjusted to described second power, synchronously enable temperature protection function and the reflection power defencive function of described micro-wave oven.
10. the control method for micro-wave oven as described in any one of claim 6-9, is characterized in that, described microwave source group comprises one or more microwave source.
11. 1 kinds of micro-wave ovens, is characterized in that, comprising:
Cooking chamber;
Base plate;
Housing case;
Be arranged on the guidance panel on described cooking chamber, described guidance panel is for receiving the culinary art instruction of user;
The microwave source be connected with described cooking chamber, described microwave signal for generation of microwave signal, and is passed to circulator by described microwave source;
The described circulator be connected with described microwave source, reflection power and described microwave source for receiving described microwave signal, and are isolated by described circulator, with avoid described microwave source due to reflection power excessive and burnt;
Be arranged on the feedthrough on described housing case, the microwave signal that described feedthrough sends for receiving described circulator, and by cooking chamber described in described microwave signal feed-in;
The temperature protection parts be connected with described circulator, described temperature protection parts for the temperature of the temperature and described microwave source that detect ohmic load in described circulator, to obtain testing result;
The controller be connected with described cooking chamber; described controller is used for controlling described micro-wave oven according to the culinary art instruction of described user and cooks; the duty of described microwave source is adjusted according to the testing result of described temperature protection parts; damage due to high temperature to avoid the device in described micro-wave oven; and control operating frequency, the operating power of described micro-wave oven, and operating phase combination.
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