CN102235690A - Microwave oven and control method thereof - Google Patents
Microwave oven and control method thereof Download PDFInfo
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- CN102235690A CN102235690A CN2010101524006A CN201010152400A CN102235690A CN 102235690 A CN102235690 A CN 102235690A CN 2010101524006 A CN2010101524006 A CN 2010101524006A CN 201010152400 A CN201010152400 A CN 201010152400A CN 102235690 A CN102235690 A CN 102235690A
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Abstract
The invention discloses a microwave oven which comprises a transformer, a magnetron used for generating microwave to heat food, a fan motor and a furnace lamp. Buttons are provided between the transformer and a main control chip. The invention also discloses a control method of the microwave oven. The method comprises the following steps: (1) in a power-off state, buttons are pressed down and the main control chip is energized instantly; (2) the main control chip controls relay connection to realize normal power supply of the main control chip; (3) a user carries out a control operation on the microwave oven according to requirements; (4) after finish of an assigned operation, a load is disconnected; (5) when time of load disconnection reaches predetermined time, the main control chip controls a control triode to release the relay. According to the microwave oven, when the buttons are pressed down, the fan motor or the furnace lamp is started simultaneously, and operation flow is simplified. After finish of the operation, the main control chip controls releasing of the relay, and power supply to the main control chip is completely disconnected to realize maximum energy saving.
Description
Technical field
The present invention relates to the micro-wave oven technical field, particularly relate to a kind of micro-wave oven and control method thereof.
Background technology
Micro-wave 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, micro-wave 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 materials 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, micro-wave oven is heat food well, has obtained utilization widely in daily life.
In general, micro-wave 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 micro-wave 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 micro-wave oven, peripheral workpiece such as magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5 form micro-wave 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 gauge tap (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 micro-wave oven workpiece, main control chip 10 gives control triode 6 with low level, these control triode 6 not conductings, the input level of the feasible relay 1 that links to each other with control triode 6 of meeting is a low level, at this moment relay 1 discharges, coupled micro-wave oven workpiece is not communicated with microwave oven supply power 20, thereby does not move; When needs make the operation of micro-wave oven workpiece, main control chip 10 gives control triode 6 with high level, 6 conductings of control triode, the input level of the feasible relay 1 that links to each other with control triode 6 of meeting is a high level, at this moment relay 1 adhesive, coupled micro-wave oven workpiece is communicated with microwave oven supply power 20, thereby starts the micro-wave oven workpiece.Therefore microwave oven supply power 20 is controlled by relay 1 with the conducting or the disconnection of each peripheral workpiece.
But current production power saving or method for saving energy are normally cut off power supply, make the main control chip be in electroless state, need connection circuit again, troublesome poeration when needing to use.Especially to using ventilating hood-type microwave oven, if will operate fan or then necessary micro-wave oven and then the button operation of starting earlier of stove lamp, complex steps has reduced user satisfaction.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of power supply that can cut off the main control chip automatically to reach energy-conservation purpose, and is communicated with main control chip method for controlling microwave oven easily again.
The technical solution adopted in the present invention is:
A kind of micro-wave oven, it comprises transformer, is used to produce the magnetron of microwave so that food is heated, and fan electromotor and stove lamp, and the main control chip that can control each assembly, be provided with button 81 between described transformer 30 and the main control chip 10.
Described button is the mechanical type button.
Described button 81 1 ends are connected with transformer 30, the other end is connected to the base stage of control triode 86 behind diode, RC filter circuit, the colelctor electrode of described control triode 86 is connected with the C port of main control chip 10 after common ground behind the resistance, and described control triode 86 emitter stages are connected to low level.
Also be provided with button 82 between described transformer 30 and the main control chip 10, described button 82 is the three terminal bidirectional button, and the A of button 82, B two contacts are connected to button 81 two ends respectively, and wherein said button 82A contact B often is communicated with contact O, when button 82 was pressed, contact A was communicated with contact O; Described contact O is connected to the base stage of control triode 87 behind diode, RC filter circuit, the colelctor electrode of described control triode 87 is connected with the D port of main control chip 10 after common ground behind the resistance, and described control triode 87 emitter stages are connected to low level.
The described control method of microwave oven of a kind of claim 1 is characterized in that: may further comprise the steps,
1) under electroless state, when pushing button 81 the time, it is communicated with transformer 30 with 10 moments of main control chip, and main control film-making 10 is powered;
2) gather C port D port status main control chip 10 power supply backs, and 96 conductings of control control triode make relay 91 adhesives then, and transformer 30 is communicated with main control chip 10, realize main control chip normal power supply;
3) user carries out control operation by demand to micro-wave oven;
4) after finishing assigned operation, micro-wave oven control discharges corresponding relay 1, disconnecting consumers;
5) after reaching the scheduled time behind the disconnecting consumers, main control chip 10 control control triodes 96 discharge relay 91, and the energy supply circuit of transformer 30 with main control chip 10 disconnected fully.
Described control method, described step comprise,
1) under electroless state, when pushing button 82 the time, it is communicated with transformer 30 with 10 moments of main control chip, and main control film-making 10 is powered;
2) gather C port D port status main control chip 10 power supply backs, 96 conductings of control control triode make relay 91 adhesives then, and transformer 30 is communicated with main control chip 10, realize main control chip 10 normal power supplies, control relay 92 adhesives simultaneously start fan electromotor;
3) after user's shut-down operation, main control chip controls relay 92 discharges;
4) after reaching the scheduled time behind the disconnecting consumers, main control chip 10 control control triodes 96 discharge relay 91, and the energy supply circuit of transformer 30 with main control chip 10 disconnected fully.
The invention has the beneficial effects as follows: micro-wave oven of the present invention is by being provided with button and relay, when pressing, triggers button the main control chip, its normal energy supply is given in main control chip and then control relay adhesive, start fan electromotor or stove lamp simultaneously when button can also be implemented in, simplified operating process, after a period of time was finished in operation, main control chip controls relay discharged, can disconnect energy supply fully, realize energy-conservation to greatest extent the main control chip.
Description of drawings
Fig. 1 is the microwave oven structure block diagram of prior art;
Fig. 2 is a microwave oven structure block diagram of the present invention;
Fig. 3 is a microwave oven circuit structural representation of the present invention;
Fig. 4 is that main control chip of the present invention recovers the energy supply control flow chart;
Fig. 5 is a direct startup fan electromotor control flow chart of the present invention.
The specific 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 micro-wave oven, this micro-wave oven includes relay 1, magnetron 2, 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, and rotary tray motor 41 and fan electromotor 42 are respectively applied for and drive rotating disk, fan rotates, and stove lamp 5 is used for being thrown light in the culinary art chamber of micro-wave oven.Be provided with button 81 and relay 91 between transformer 30 of the present invention and the main control chip 10, described button 81 two ends are connected to transformer 30 and main control chip 10 respectively, described relay 91 inputs are connected with main control chip 10, its output is communicated with transformer 30 and main control chip 10, main control chip 10 is after detecting signal voltage, and then with the power supply that realizes main control chip 10 whether control control triode 96 is realized the adhesive of relays 91 or discharged.
Need to prove, described button 80 is the mechanical type button, when pressing, be about to main control chip and transformer conducting, main control chip moment is powered on, when user's finger is taken away, button 80 is upspring, but in this time interval, the main control chip is enough to receive this communications signals and control realizes normal power supply with relay 91 adhesives.
To adopt the device of said method to further specify to the present invention below,
As shown in Figure 3, output at transformer connects button 81, described button 81 is connected to the base stage of control triode 86 behind diode, RC filter circuit, the colelctor electrode of described control triode 86 is connected with the C port of main control chip 10 after common ground behind the resistance, and described control triode 86 emitter stages are connected to low level.When button 81 was not pressed, the base voltage of triode 86 was zero, and triode presents high impedance, was similar to switch and disconnected; When button 81 is pressed, transistor base is a voltage for just, this moment, triode presented Low ESR, be similar to switch connection, the C port of main control chip receives signal voltage, 10 control of main control chip B port output high level conducting control triode 96 makes relay 91 adhesives to be communicated with external circuit, realizes the normal power supply of main control chip 10.The user can operate by demand then, and after reaching preset time behind the complete operation, main control chip 10 control control triodes 96 discharge relay 91, disconnect the energy supply of main control chip 10, reach energy-conservation purpose.
A nearlyer step ground, for simplifying the operation, also be provided with button 82 in the described circuit, described button 82 is the three terminal bidirectional button, the A of button 82, B two contacts are connected to button 81 two ends respectively, the A contact B of wherein said button 82 often is communicated with contact O, and when button 82 was pressed, contact A was communicated with contact O; Described contact O is connected to the base stage of control triode 87 behind diode, RC filter circuit, the colelctor electrode of described control triode 87 is connected with the D port of main control chip 10 after common ground behind the resistance, and described control triode 87 emitter stages are connected to low level.Wherein, when button 81 was pressed, C port, D port received signal level simultaneously, and 91 adhesives of main control chip controls relay realize its normal power supply.When button 82 was pressed, the D port received signal level, and the C port can not receive signal level, main control chip 10 is gathered C, the D port status, control relay 91 adhesives realize its normal power supply, simultaneously the drive circuit of control relay 92 adhesive fan electromotors.Promptly when button 82 is pressed, can realize starting fan, thereby realize the purpose of control fan under the main control chip electroless state.
Further, a button identical with button 82 can be set, described button is controlled respectively with corresponding to the stove lamp, when it is pressed, after powering on for main control chip moment, when 91 adhesives of main control chip controls relay realized normal power supply, follow procedure provides control command adhesive corresponding relays made the stove lamp carry out work, the step that simplifies the operation improves service efficiency.Certainly, also can make and when button is pressed, directly start stove lamp and fan electromotor simultaneously by being provided with.
Need to prove that above-mentioned circuit adopts negative logic, simply changes to the positive logic circuit, perhaps the simple modification of foregoing circuit is retouched, all within protection scope of the present invention.
Figure 4 shows that micro-wave oven control flow chart of the present invention, as shown in Figure 4, under electroless state, be disconnected between main control chip 10 and the transformer 30, inside chip is in complete off-position, cut down the consumption of energy effectively, when pushing button 81 the time, it is communicated with transformer 30 with 10 moments of main control chip, main control film-making 10 is by short time power supply (step 100-300), 96 conductings of the triode of control control immediately make relay 91 adhesives behind the state of main control chip 10 power supply collection C ports and D port, transformer 30 is communicated with main control chip 10, realizes main control chip normal power supply (step 400), the user can control micro-wave oven and operate then, after finishing assigned operation, micro-wave oven control discharges corresponding relay 1, and disconnecting consumers (step 500-800) is after reaching the scheduled time behind the disconnecting consumers, main control chip 10 control control triodes 96 discharge relay 91, and the function circuit of transformer 30 and main control chip 10 is disconnected (step 900-1000) fully.
Figure 5 shows that the process control chart of startup fan electromotor and stove lamp under the direct electroless state.Under electroless state, be disconnected between main control chip 10 and the transformer 30, inside chip is in complete off-position, cut down the consumption of energy effectively, when pushing button 82 the time, it is communicated with transformer 30 with 10 moments of main control chip, main control film-making 10 is by short time power supply (step 51-53), 96 conductings of the triode of control control immediately make relay 91 adhesives behind the state of main control chip 10 power supply collection C ports and D port, transformer 30 is communicated with main control chip 10, realize main control chip normal power supply, control relay 92 adhesives simultaneously, start fan electromotor (step 54), the user stops the fan electromotor running behind complete operation, and main control chip controls relay 92 discharges (step 55), after reaching the scheduled time behind the disconnecting consumers, main control chip 10 control control triodes 96 discharge relay 91, and the energy supply circuit of transformer 30 and main control chip 10 is disconnected (step 56-57) fully.
Need to prove, the present invention is directed to button and relay and be arranged between transformer and the main control chip and describe, button and relay are arranged between external circuit and the transformer that can realize the present invention's purpose equally, this repeats no more again.
In sum, micro-wave oven of the present invention is by being provided with button and relay, when pressing, triggers button the main control chip, its normal energy supply is given in main control chip and then control relay adhesive, starts fan electromotor or stove lamp simultaneously when can also be implemented in button, has simplified operating process, after a period of time is finished in operation, main control chip controls relay discharges, and can disconnect the energy supply to the main control chip fully, realizes energy-conservation to greatest extent.
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 (6)
1. micro-wave oven, it comprises transformer, be used to produce the magnetron of microwave so that food is heated, and fan electromotor and stove lamp, and the main control chip that can control each assembly, it is characterized in that: be provided with button (81) between described transformer (30) and the main control chip (10).
2. micro-wave oven as claimed in claim 1 is characterized in that: described button is the mechanical type button.
3. micro-wave oven as claimed in claim 1 or 2, it is characterized in that: described button (81) one ends are connected with transformer (30), the other end is connected to the base stage of control triode (86) behind diode, RC filter circuit, the colelctor electrode of described control triode (86) is connected with the C port of main control chip (10) after common ground behind the resistance, and described control triode (86) emitter stage is connected to low level.
4. micro-wave oven as claimed in claim 1, it is characterized in that: also be provided with button (82) between described transformer (30) and the main control chip (10), described button (82) is the three terminal bidirectional button, the A of button (82), B two contacts are connected to button (81) two ends respectively, wherein said button (82) A contact B often is communicated with contact O, when button (82) when pressing, contact A is communicated with contact O; Described contact O is connected to the base stage of control triode (87) behind diode, RC filter circuit, the colelctor electrode of described control triode (87) is connected with the D port of main control chip (10) after common ground behind the resistance, and described control triode (87) emitter stage is connected to low level.
5. described control method of microwave oven of claim 1 is characterized in that: may further comprise the steps,
1) under electroless state, when pushing button (81), it is communicated with transformer (30) with main control chip (10) moment, and main control film-making (10) is powered;
2) gather C port D port status main control chip (10) power supply back, and the conducting of control control triode (96) makes relay (91) adhesive then, and transformer (30) is communicated with main control chip (10), realizes main control chip normal power supply;
3) user carries out control operation by demand to micro-wave oven;
4) after finishing assigned operation, micro-wave oven control discharges corresponding relay (1), disconnecting consumers;
5) after reaching the scheduled time behind the disconnecting consumers, main control chip (10) control control triode (96) discharges relay (91), and the energy supply circuit of transformer (30) with main control chip (10) disconnected fully.
6. control method as claimed in claim 5 is characterized in that: described step comprises,
1) under electroless state, when pushing button (82), it is communicated with transformer (30) with main control chip (10) moment, and main control film-making (10) is powered;
2) gather C port D port status main control chip (10) power supply back, the conducting of control control triode (96) makes relay (91) adhesive then, transformer (30) is communicated with main control chip (10), realize main control chip (10) normal power supply, control relay (92) adhesive simultaneously starts fan electromotor;
3) after user's shut-down operation, main control chip controls relay (92) discharges;
4) after reaching the scheduled time behind the disconnecting consumers, main control chip (10) control control triode (96) discharges relay (91), and the energy supply circuit of transformer (30) with main control chip (10) disconnected fully.
Priority Applications (1)
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|---|---|---|---|
| CN2010101524006A CN102235690A (en) | 2010-04-22 | 2010-04-22 | Microwave oven and control method thereof |
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| CN2010101524006A CN102235690A (en) | 2010-04-22 | 2010-04-22 | Microwave oven and control method thereof |
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| CN102235690A true CN102235690A (en) | 2011-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582044A (en) * | 2013-10-18 | 2015-04-29 | 美的集团股份有限公司 | Control circuit and control method for electromagnetic heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582044A (en) * | 2013-10-18 | 2015-04-29 | 美的集团股份有限公司 | Control circuit and control method for electromagnetic heating device |
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Application publication date: 20111109 |