CN102223739A - Circuit of microwave oven and control method thereof - Google Patents
Circuit of microwave oven and control method thereof Download PDFInfo
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- CN102223739A CN102223739A CN2010101500069A CN201010150006A CN102223739A CN 102223739 A CN102223739 A CN 102223739A CN 2010101500069 A CN2010101500069 A CN 2010101500069A CN 201010150006 A CN201010150006 A CN 201010150006A CN 102223739 A CN102223739 A CN 102223739A
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Abstract
The invention discloses a circuit of a microwave oven, comprising a transformer, a master control chip and a storage battery, wherein, the power supply circuit and charging circuit of the storage battery are connected with the energy supply circuit of the master control chip in parallel; and the master control chip comprises an electric quantity detection module for detecting the remaining electric quantity of the storage battery. The invention also discloses a control method comprising the following steps: 1) comparing the remaining electric quantity with a predetermined value; 2) if the remaining electric quantity is less than the predetermined value, detecting the working condition of the microwave oven; 3) when the microwave oven is not in operation, charging the storage battery; 4) starting the microwave oven to operate in the charging process, and stopping charging; and 5) stopping charging when the storage battery is charged to be saturated. By utilizing the microwave oven provided by the invention, intelligent charging is realized, the charging times of the storage battery is effectively reduced, the instability caused by the charging in a working condition is avoided, the energy supply condition of the external power source can be effectively detected, the management information can be effectively saved and the user is prompted when the unexpected power failure occurs, and management can be continued when the power supply is recovered, thus improving the properties of the product.
Description
Technical field
The present invention relates to the microwave oven technical field, particularly relate to a kind of microwave oven circuit and control method thereof with storage battery.
Background technology
Microwave oven is to produce microwave by electric current, and microwave irradiation surface of heating object in the cavity is come device that article are heated.As everyone knows, microwave oven is a kind of modernization cooking kitchen range with microwave heating of food.The microwave that it adopted is a kind of electromagnetic wave.This electromagnetic energy is not only much bigger than common radio wave, but also characteristics are arranged very much, and microwave at a touch metal just reflects, and metal has no idea to absorb or conduct it at all; Microwave can pass insulating material such as glass, pottery, plastics, but can consumed energy; And contain the food of moisture, and microwave not only can not see through, and its energy can be absorbed on the contrary.Based on these characteristics, microwave oven is heat food well, has obtained utilization widely in daily life.
In general, microwave oven is divided into single function for microwave oven and multifunction microwave oven, single function for microwave oven is to adopt microwave heating, promptly be a kind ofly to seal, connect the power supply of magnetron after placed within of the food, make it produce high-frequency microwave, by waveguide high-frequency microwave is shone on the food, makes about 2,400,000,000 5 thousand ten thousand times of hydrone internal vibration in a second of food, by the frictional heat that produces between hydrone to cooking food, heating; It is the microwave oven of one that multifunction microwave oven adopts microwave heating and other mode of heatings, and common mode of heating has light wave heating and electrothermal tube heating, is also referred to as barbecue type microwave oven; And ventilating hood-type microwave oven, it also has function from the flue gas that produces in the gas burning roastor of bottom to the outside that can discharge except having the basic function of utilizing microwave cooked cooking thing.
Fig. 1 is the microwave oven structure block diagram of prior art.Referring to Fig. 1, in microwave oven, peripheral workpiece such as magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5 form microwave oven peripheral forceful electric power circuit (in this circuit the operation level of each parts all 220V or more than), they all are to come control switch (being conducting or disconnection) by a relay 1, relay 1 is that a coil is wrapped on the iron core, and this relay reaches the purpose of the peripheral forceful electric power circuit of conducting by electromagnetic induction after energising.When not needing to make the operation of microwave oven workpiece, master control chip 10 control relays 1 discharge, and coupled microwave oven workpiece is not communicated with microwave oven supply power 20, thereby does not move; When needs make the operation of microwave oven workpiece, 1 adhesive of master control chip 10 control relays, coupled microwave oven workpiece is communicated with microwave oven supply power 20, thereby starts the microwave oven workpiece.Therefore microwave oven supply power 20 is controlled by relay 1 with the conducting or the disconnection of each peripheral workpiece.
But all there are the master control chip internal in existing microwave oven program and user's operation control command, and microwave oven all adopts live wire 120V or 220V power supply, yet the internal information of master control chip is eliminated immediately behind the accident power-off, can't make the outage of burst and judging and operation information, can not make corresponding processing, not possess intelligence.
And for the microwave oven that is provided with storage battery, the minimum value that the storage battery loop does not have quantification to discharge and recharge, too much number of times discharges and recharges the life-span that certainly will reduce storage battery, and if storage battery charges when microwave oven is worked, when transformer and storage capacitor do not provide these electric currents, will certainly cause abnormal operating states such as LED flicker or brightness deepening, relay adhesive shakiness, reduce properties of product.
Summary of the invention
Technical problem to be solved by this invention is, the shortcoming that overcomes prior art provides a kind of microwave oven, it can intelligent charge and the external power source accident power-off is made judgement, can keep cooking information and prompting user outage during outage, can continue cooking when restoring electricity automatically.
The technical solution adopted in the present invention is:
A kind of microwave oven circuit, comprise transformer and master control chip, but also comprise the storage battery of energy supply to the master control chip, the power supply circuits of described storage battery and charging circuit are in parallel with the energy supply circuit of master control chip, described power supply circuits are in series with unidirectional breakover element, and described charging circuit is in series with switch element; Described master control chip also comprises the electric weight detection module that detects the storage battery dump energy.
Described master control chip also comprises the power supply detection module that is electrically connected and can detects the external power source state with transformer.
Described unidirectional breakover element is a diode, and described switch element is the controlled relay of master control chip.
Described transformer output DC behind rectification circuit, its cathode output end are disposed with B point and A point, and described B point and A point are in series with diode, and described diode only allows electric current to flow to the A point from the B point, oppositely then ends; Described battery terminal negative ground connection, positive pole is electrically connected to the A point behind diode, and described diode (81) only allows electric current to flow to the A point from storage battery, oppositely ends; Be provided with relay with described diode, described relay output circuit two ends are electrically connected to battery positive voltage and A point respectively with being in parallel, and the input of described relay is connected to the D port of master control chip through the control triode; The positive pole of storage battery is connected to the A/D port of the electric weight detection module (12) of master control chip behind divider resistance R72, R73.
Described rectification circuit output cathode end B point ground connection behind divider resistance R70 and R71 is connected to the P port of master control chip after being parallel with filter capacitor between R70 and the R71.
A kind of control method of controlling the described circuit of claim 1, it may further comprise the steps:
1) after microwave oven is connected external power source, the electric weight detection module detects the dump energy of storage battery, and with the predetermined value of master control chip stored relatively, dump energy does not then have operation greater than predetermined value, is less than or equal to predetermined value and then carries out next step;
2) master control chip detection working station of microwave oven if microwave oven is then waited for end-of-job in working order, does not then carry out next step if microwave oven is worked;
3) adhesive of master control chip controls relay is to charge to storage battery;
4) the microwave oven startup is started working in charging process, and then master control chip controls relay discharges the charging that stops storage battery, and gets back to step 2, if microwave oven is not activated work, then continues charging;
When 5) dump energy that detects when the electric weight detection module equaled saturation value, master control chip controls relay discharged the charging that stops storage battery, finished its charging is overcharged avoiding.
Described predetermined value is charge value or lower limit.
Described control method also comprises, the dump energy that detects storage battery when the electric weight detection module is during less than lower limit, flicker of master control chip controls LED lamp or buzzer call are pointed out, and the prompting user should stop microwave oven work so that storage battery is charged.
Described control method also comprises 1) external power source accident power-off in the cooking process, storage battery is immediately to the energy supply of master control chip, and the master control chip obtains the cooking information that the P port status changes and preserve power-cut time;
2) storage battery is simultaneously also to LED lamp and/or buzzer energy supply, and described LED lamp flicker of master control chip controls and/or buzzer call, with prompting user external power source fault;
3) external circuit recovers energy supply, and the master control chip obtains the variation of P port status and further control LED lamp stops flicker and/or buzzer stops to pipe;
4) the master control chip is written into the cooking information that power-cut time is stored again, works on to finish until cooking.
The invention has the beneficial effects as follows: microwave oven of the present invention increases intelligent storage circuit, when dump energy just starts charging during to certain value, can reduce the charging and discharging of accumulator number of times to greatest extent, prolongs the life-span of storage battery; And avoid the microwave oven operating time by the charging of master control chip controls, prevent because of the abnormal operating states such as the LED that causes of institute flicker or brightness deepening, relay adhesive shakiness that charge, when the external circuit accident power-off, storage battery is immediately to the energy supply of master control chip, and the master control chip enters the halted state of outage memory and preserves cooking information, reenter normal cooking operating state Deng service restoration, arrange the trouble that interruption can't recover thereby reduced because of outage.And in the time of outage, can there be lampet flicker and buzzer call to point out, remind the user to carry out line maintenance, avoid secondary disaster, when externally fed recovers, the LED buzzer that goes out stops to pipe, and the master control chip is written into the cooking information of power-cut time again, proceeds corresponding work.
Description of drawings
Fig. 1 is the microwave oven structure block diagram of prior art;
Fig. 2 is a microwave oven block diagram of the present invention;
Fig. 3 is a microwave oven circuit structural representation of the present invention;
Fig. 4 is a charging flow schematic diagram of the present invention;
Fig. 5 is a power down process schematic flow sheet of the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
As shown in Figure 2, the invention provides a kind of microwave oven, this microwave oven comprises transformer 30 and master control chip 10, and the magnetron 2 of controlling its operating states by master control chip 10, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5, wherein, described magnetron 2 is used to produce the microwave that food is heated, barbecue tube 2 is used for food is roasted, rotary tray motor 41 and fan electromotor 42 are respectively applied for the driving rotating disk, fan rotates, stove lamp 5 is used for being thrown light in the culinary art chamber of microwave oven, also be provided with storage battery 80 between described transformer 30 and the master control chip 10, when the external power source sudden power of microwave oven, storage battery 80 can in time give the master control chip 10 power supplies, does not lose with the user's input information that guarantees master control chip 10 stored.Described storage battery 80 in parallel with the energy supply circuit of master control chip 10 through power supply circuits and charging circuit, described power supply circuits and charging circuit are in parallel, and described power supply circuits are in series with unidirectional breakover element, and described charging circuit is in series with switch element; Described unidirectional breakover element is a diode 81, and described switch element is the controlled relay 82 of master control chip 10.
Described master control chip 10 also comprises the electric weight detection module 12 that detects storage battery 80 dump energies, the A/D port of described electric weight detection module 12 and the positive pole of storage battery 80 are electrically connected, after digital-to-analogue conversion, described electric weight detection module can be with the dump energy digitlization of storage battery 80, and information passed to master control chip 10, to charge in batteries whether master control chip 10 is according to the adhesive of this information Control relay 82 or discharge control.
Described master control chip 10 also comprises the power supply detection module 11 that is electrically connected and can detects the external power source state with transformer 30, whether function is normal to judge external power source by power supply detection module 11, when occurring after master control chip when unusual is accepted the signal of power supply detection module 11 ongoing cooking being suspended and to give user prompt information simultaneously with the cooking information storage, as sudden strain of a muscle of LED lamp or buzzer call etc., after the outside restores electricity, the master control chip is accepted to recover the cooking process behind the signal of power supply detection module 11, and stops information.
Figure 3 shows that the circuit diagram of microwave oven of the present invention, the external power source (not shown) is carried out rectification by rectification circuit 31 after transformer 30 step-downs, output at rectification circuit 31 obtains direct current of voltage regulation, the general voltage that obtains at the B point is 12V, the cathode output end of described rectification circuit 31 is connected to the Input voltage terminal of master control chip, as the Vcc pin, the cathode output end of described rectification circuit 31 is connected to the common ground end of master control chip 10, as the Vss pin.Described rectification circuit 31 output cathode end B points ground connection behind divider resistance R70 and R71, after being parallel with filter capacitor between R70 and the R71, be connected to the P port of master control chip power detection module 11, described P port is in order to judge whether normal power supply of microwave oven external power source, when normal power supply, described P port is a high level, when unexpected power failure, described P port is a low level.
Be electrically connected at the A of rectification circuit 31 electrode input ends point and storage battery 80, described B point and A point are in series with diode 32, and 32 of described diodes allow electric current to flow to the A point from the B point, oppositely then end.
But described storage battery 80 is a 12V charging/discharging type storage battery, and it is the storage battery of other materials such as ickel-cadmium cell, metal hydride battery, lithium battery, lithium ion battery.
Described storage battery 80 minus earths, positive pole is connected to the A point through power supply circuits, is provided with diode 81 in the described power supply circuits, it allows electric current to flow to the A point from storage battery 80, oppositely end, promptly storage battery 80 can only be given the energy supply of master control chip by this path, and can not be from this path charging.Be provided with charging circuit with described diode 81 with being in parallel, it is in series with relay 82, described relay 82 inputs are through controlling the D port that triode 83 is connected to the master control chip, and described relay 82 output circuit two ends are electrically connected to storage battery 80 anodal and A points respectively.Wherein said control triode 83 base stages are connected with the master control chip, grounded emitter, and collector electrode is connected with the input of relay.And described relay 82 is the open type relay.
The positive pole of storage battery 80 is received the A/D port of electric weight detection module through divider resistance R72, R73, the data that described master control chip is gathered by the A/D port can be judged the voltage and the electric weight of storage battery, and judge the charge in batteries time, thereby realize intelligently charging to storage battery in conjunction with the operating state of microwave oven.
Fig. 4 is the flow chart of control charge in batteries, as shown in Figure 4, after microwave oven is connected external power source, master control chip 10 is promptly gathered the data of A/D port, and and preset value compare, wherein said preset value comprises saturation value and lower limit, wherein saturation value is meant that storage battery continues the magnitude of voltage of charging back saturation condition, described lower limit is the required lower voltage limit value of single-chip microcomputer, and this numerical value can by test obtain or the parameter that provides by producer in obtain, if the current numeral that collects is greater than set lower limit, then do not carry out next step operation (step 100,200), if current numeral of gathering is less than or equal to set lower limit, whether then master control chip detection microwave oven is in work, words in work are waited for the microwave oven end-of-job, if microwave oven is work not, then 82 adhesives of master control chip 10 control relays are with (step 300 that storage battery 80 is charged, 400), if the microwave oven startup is started working in charging process, then master control chip 10 control relays 82 discharge the charging that stops storage battery 80, in order to avoid operating circuit is impacted (step 500), when the numeral of obtaining when the A/D of master control chip port equals saturation value, master control chip relay 82 discharges the charging that stops storage battery 80, finishes its charging is overcharged avoiding.
Further, for coordinating the relation between charging and the microwave oven work, in the master control chip, also be provided with and store charge value, when the numeral of obtaining when the A/D port is less than or equal to charge value, then master control chip controls was charged in the non-working time of microwave oven, wherein said charge value less than saturation value greater than lower limit.The numeral of obtaining when the A/D port is during less than lower limit, and then whether microwave oven work all charges to storage battery 80, and storage battery is not enough to the energy supply of master control chip with accident power-off during avoiding.
Further, the numeral of obtaining when the A/D port can also be pointed out by flicker of master control chip controls LED lamp or buzzer call during less than lower limit, and the prompting user should stop microwave oven work so that storage battery is charged.
Below in conjunction with Fig. 5 the control procedure of microwave oven of the present invention when accident is cut off the power supply described, when microwave oven is communicated with external power source, the user sets the cooking program by demand, the master control chip is with the cooking information storage and start cooking (step 61,62), in the cooking process if the external power source accident power-off, storage battery is immediately to the energy supply of master control chip, and the P port status that obtains of master control chip changes the cooking information (step 63) of judging outside outage preservation power-cut time, storage battery is simultaneously also to LED lamp and/or buzzer energy supply, and described LED lamp flicker of master control chip controls and/or buzzer call, with prompting user external power source fault, prompting customer inspection circuit, investigation outage reason, to avoid taking place other accidents (step 64), after fault is got rid of, external circuit recovers energy supply, the master control chip obtains the variation of P port status and further control LED lamp stops flicker and/or buzzer stops the (step 65 that pipes, 66), the master control chip is written into the cooking information that power-cut time is stored again then, works on to finish (step 67 until cooking, 68).
In sum, microwave oven of the present invention increases intelligent storage circuit, when dump energy just starts charging during to certain value, can reduce the charging and discharging of accumulator number of times to greatest extent, prolongs the life-span of storage battery; And avoid the microwave oven operating time by the charging of master control chip controls, prevent because of the abnormal operating states such as the LED that causes of institute flicker or brightness deepening, relay adhesive shakiness that charge, when the external circuit accident power-off, storage battery is immediately to the energy supply of master control chip, and the master control chip enters the halted state of outage memory and preserves cooking information, reenter normal cooking operating state Deng service restoration, arrange the trouble that interruption can't recover thereby reduced because of outage.And in the time of outage, can there be lampet flicker and buzzer call to point out, remind the user to carry out line maintenance, avoid secondary disaster, when externally fed recovers, the LED buzzer that goes out stops to pipe, and the master control chip is written into the cooking information of power-cut time again, proceeds corresponding work.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. microwave oven circuit, comprise transformer (30) and master control chip (10), it is characterized in that: but also comprise the storage battery (80) of energy supply to master control chip (10), the power supply circuits of described storage battery (80) and charging circuit are in parallel with the energy supply circuit of master control chip (10), described power supply circuits are in series with unidirectional breakover element, and described charging circuit is in series with switch element; Described master control chip (10) also comprises the electric weight detection module (12) that detects storage battery (80) dump energy.
2. microwave oven circuit as claimed in claim 1 is characterized in that: described master control chip (10) also comprises the power supply detection module (11) that is electrically connected and can detects the external power source state with transformer (30).
3. microwave oven circuit as claimed in claim 1 is characterized in that: described unidirectional breakover element is diode (81), and described switch element is the controlled relay (82) of master control chip (10).
4. microwave oven circuit as claimed in claim 1, it is characterized in that: described transformer (30) is output DC behind rectification circuit (31), its cathode output end is disposed with B point and A point, described B point and A point are in series with diode (32), described diode (32) only allows electric current to flow to the A point from the B point, oppositely then ends; Described storage battery (80) minus earth, positive pole is electrically connected to the A point behind diode (81), and described diode (81) only allows electric current to flow to the A point from storage battery 80, oppositely ends; Be provided with relay (82) with described diode (81) with being in parallel, described relay (82) output circuit two ends are electrically connected to the anodal and A point of storage battery (80) respectively, and the input of described relay (82) is connected to the D port of master control chip (10) through control triode (83); The positive pole of storage battery (80) is connected to the A/D port of the electric weight detection module (12) of master control chip (10) behind divider resistance R72, R73.
5. microwave oven circuit as claimed in claim 2 is characterized in that: described rectification circuit 31 output cathode end B points ground connection behind divider resistance R70 and R71 is connected to the P port of master control chip (10) after being parallel with filter capacitor between R70 and the R71.
6. control method of controlling the described circuit of claim 1 is characterized in that:
1) after microwave oven is connected external power source, the electric weight detection module detects the dump energy of storage battery, and with the predetermined value of master control chip stored relatively, dump energy does not then have operation greater than predetermined value, is less than or equal to predetermined value and then carries out next step;
2) master control chip (10) detects working station of microwave oven, if microwave oven is then waited for end-of-job in working order, does not then carry out next step if microwave oven is worked;
3) master control chip (10) control relay (82) adhesive is to charge to storage battery (80);
4) the microwave oven startup is started working in charging process, and then master control chip (10) control relay (82) discharges the charging that stops storage battery (80), and gets back to step 2, if microwave oven is not activated work, then continues charging;
When 5) dump energy that detects when the electric weight detection module equaled saturation value, master control chip controls relay (82) discharged the charging that stops storage battery (80), finished its charging is overcharged avoiding.
7. control method as claimed in claim 6 is characterized in that: described predetermined value is charge value or lower limit.
8. as claim 6 or 7 described control methods, it is characterized in that: the dump energy that detects storage battery when the electric weight detection module is during less than lower limit, flicker of master control chip controls LED lamp or buzzer call are pointed out, and the prompting user should stop microwave oven work so that storage battery is charged.
9. control method as claimed in claim 6 is characterized in that: it also comprises,
1) external power source accident power-off in the cooking process, storage battery are immediately to the energy supply of master control chip, and the master control chip obtains the cooking information that the P port status changes and preserve power-cut time;
2) storage battery is simultaneously also to LED lamp and/or buzzer energy supply, and described LED lamp flicker of master control chip controls and/or buzzer call, with prompting user external power source fault;
3) external circuit recovers energy supply, and the master control chip obtains the variation of P port status and further control LED lamp stops flicker and/or buzzer stops to pipe;
4) the master control chip is written into the cooking information that power-cut time is stored again, works on to finish until cooking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101500069A CN102223739A (en) | 2010-04-19 | 2010-04-19 | Circuit of microwave oven and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101500069A CN102223739A (en) | 2010-04-19 | 2010-04-19 | Circuit of microwave oven and control method thereof |
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| CN102223739A true CN102223739A (en) | 2011-10-19 |
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| CN2010101500069A Pending CN102223739A (en) | 2010-04-19 | 2010-04-19 | Circuit of microwave oven and control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591240A (en) * | 2012-03-08 | 2012-07-18 | 宁波吉盛电器有限公司 | Control system circuit of electric oven |
| CN107990376A (en) * | 2017-12-19 | 2018-05-04 | 江苏信息职业技术学院 | A kind of sharing functionality micro-wave oven |
| CN108013750A (en) * | 2016-11-02 | 2018-05-11 | 广东美的生活电器制造有限公司 | Heating vessel and its control method |
| CN109709830A (en) * | 2018-12-29 | 2019-05-03 | 珠海优特智厨科技有限公司 | A kind of replacing options of cooking equipment, device and storage medium |
| CN110556897A (en) * | 2019-09-29 | 2019-12-10 | 密码精灵有限公司 | charging control method and device of intelligent door lock and intelligent door lock |
-
2010
- 2010-04-19 CN CN2010101500069A patent/CN102223739A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591240A (en) * | 2012-03-08 | 2012-07-18 | 宁波吉盛电器有限公司 | Control system circuit of electric oven |
| CN108013750A (en) * | 2016-11-02 | 2018-05-11 | 广东美的生活电器制造有限公司 | Heating vessel and its control method |
| CN107990376A (en) * | 2017-12-19 | 2018-05-04 | 江苏信息职业技术学院 | A kind of sharing functionality micro-wave oven |
| CN109709830A (en) * | 2018-12-29 | 2019-05-03 | 珠海优特智厨科技有限公司 | A kind of replacing options of cooking equipment, device and storage medium |
| CN110556897A (en) * | 2019-09-29 | 2019-12-10 | 密码精灵有限公司 | charging control method and device of intelligent door lock and intelligent door lock |
| CN110556897B (en) * | 2019-09-29 | 2023-07-28 | 密码精灵有限公司 | Charging control method and device for intelligent door lock and intelligent door lock |
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Application publication date: 20111019 |