CN1242494A - AC/DC type microwave oven - Google Patents
AC/DC type microwave oven Download PDFInfo
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- CN1242494A CN1242494A CN 99100036 CN99100036A CN1242494A CN 1242494 A CN1242494 A CN 1242494A CN 99100036 CN99100036 CN 99100036 CN 99100036 A CN99100036 A CN 99100036A CN 1242494 A CN1242494 A CN 1242494A
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Abstract
An AC/DC type microwave oven having power supply management function comprises a rotatable converter for transforming DC power supply into AC power supply; a high-voltage transformer for receiving an AC voltage from a common power supply or transformed from the rotatable converter and outputting a higher voltage; a magnetron driven by a high voltage and used for emitting microwaves; and a power supply management unit which is used for detecting signals from power supply selection keys and preventing AC power supply and DC power supply are inputted at the same time. That AC power supply and DC power supply are connected to the microwave oven at the same time will lead to misoperations or over loading of an electric element. Only one of AC power supply and DC power supply is selected, and the residual voltage of a battery is measured and displayed by a display mechanism, then the battery is prevented from being discharged completely.
Description
The present invention relates to use the microwave oven of ac/dc (AC/DC) power supply, especially have the AC/DC type microwave oven of management input power supply function.
Usually, microwave oven is the device of the microwave cooked food of a kind of usefulness.Microwave oven has a high-tension transformer and a magnetron.High-tension transformer is used for the common electric voltage of 220V/110V is elevated to the high voltage of about 2000V-4000V.Magnetron is encouraged and launches the microwave of required frequency by this high voltage.Microwave oscillation is included in the molecule of the humidity in the food.Therefore, food is cooked by the frictional heat that the vibration by moist molecule produces.High-tension transformer receives alternating voltage by its importation, and with the proportional rising of the transformation ratio of primary coil and secondary coil or reduce alternating voltage.The alternating voltage that is raised or descends is fed to the output of transformer.Usually, Chang Gui microwave oven is designed to be driven by AC power.
Fig. 1 is to use the circuit diagram of a conventional microwave oven of AC power.In Fig. 1, label 10 expression high-tension transformers, the 11st, primary coil, 12 is first secondary coils, the 13rd, the second subprime coil.
Primary coil 11 is around the importation of high-tension transformer 10.First and second secondary coils 12 and 13 outputs around high-tension transformer 10.Primary coil 11 is connected with AC power AC.SW1 is a mains switch.Mains switch SW1 and is connected primary coil 11 or disconnects on the connecting line between primary coil 11 and the AC power AC with AC power AC.One high-voltage capacitor HVC, a high-voltage diode HVD are connected with the output of transformer 10 with a magnetron MGT.First secondary coil, 12 preheating magnetron MGT, the voltage that second subprime coil 13 provides AC power AC is elevated to the voltage about 2000V.Second subprime coil 13 is connected with magnetron with high-voltage diode HVD by high-voltage capacitor HVC.High-voltage capacitor HVC and high-voltage diode HVD are that a voltage multiplie will be further will be elevated to about 4000V by the voltage that second subprime coil 13 raises.Magnetron MGT is by the driven of 4000V and launch the microwave of 2450MHz (megahertz).
The course of work of above-mentioned conventional microwave oven will be described below.If the user opens switch SW 1, alternating voltage is provided to high-tension transformer 10 by switch SW 1.In high-tension transformer 10, AC-input voltage is fed to the primary coil 11 of importation, is transported to first and second secondary coils 12 and 13 of output then.First secondary coil, 12 preheating magnetron MGT, the AC-input voltage that second subprime coil 13 will be provided to the importation of primary coil 11 is elevated to about 2000V.Ac output voltage about this 2000V that is boosted by second subprime coil 13 is added to magnetron MGT then by high-voltage capacitor HVC and high-voltage diode HVD multiplication of voltage.Therefore, magnetron MGT is driven the also microwave of radiation 2450MHz (megahertz) by the ac output voltage of 4000V.The food of cooking in the (not shown) of chamber is cooked by the microwave that magnetron MGT launches.
Yet because conventional microwave oven is designed to be driven by the interchange public power (civil power) of 220V/110V, the problem of existence is that conventional microwave oven can not be with in the open air or on ship, aircraft or other delivery vehicle.
For overcoming top problem, a kind of microwave oven has been proposed, when it uses in the place that does not have AC power, can maybe this converter be contained in the microwave oven adopting a converter of the semiconductor device that separates to be connected with microwave oven so that DC power supply is transformed into AC power.
Fig. 2 is the circuit diagram of conventional microwave oven, and Fig. 3 is the circuit diagram that adopts the converter of semiconductor device.In Fig. 2, identical among the part-structure of AC power and Fig. 1, and, be provided with the converter 20 and the mains switch SW2 that adopt semiconductor device in the DC power supply part.Adopt the converter of semiconductor device that dc voltage conversion is become alternating voltage, and drive high-tension transformer 10.First primary coil 11 and second primary coil 14 are around defeated people's part of high-tension transformer 10.First primary coil 11 receives AC power, the AC power that second primary coil 14 receives by converter 20 conversion.In addition, on the output of first secondary coil 12 and second subprime coil 13 high-tension transformer 10 among high-voltage capacitor HVC, high-voltage diode HVD and the magnetron MGT.
As shown in Figure 3, adopt the converter 20 of semiconductor device to comprise circuits for triggering 1, a plurality of thyristor th1 and th2, and a capacitor C1.A plurality of thyristor th1 and th2 switch to conducting or disconnection by the switching manipulation of circuits for triggering 1, so the output of the electric current in second primary coil 14 of high-tension transformer 10, have the AC power of the voltage that requires thereby produce in high-tension transformer 10.
Yet, in the AC/DC type microwave oven that the converter that adopts semiconductor device is housed, have a problem.That is, the desired high voltage of output magnetron because converter need provide a plurality of more expensive semiconductor device is so production cost rises.
In above-mentioned conventional AC/DC type microwave oven, there is another problem, because the power consumption of semiconductor device is very high, make the lost of life of the battery that DC power supply is provided.
In above-mentioned conventional AC/DC type microwave oven, there is another problem, because the excessive heat that semiconductor device produces increases the heat energy consumption.
In above-mentioned conventional AC/DC type microwave oven, there is another problem, owing to, increase so the size of microwave oven is essential for the size of the fin that cools off semiconductor device increases.
In order to overcome the problems referred to above, applicant of the present invention has developed improved AC/DC type microwave oven, and is disclosed among the korean patent application 98-18588 that submitted on May 22nd, 1998.In this improved AC/DC type microwave oven, manufacturing cost is lowered, and power consumption reduces, and heat energy loss reduces, and the size of microwave oven can reduce, and the output frequency of rotatable inverter can be controlled keeping constant, thus also microwave radiation stably.After this, the applicant continues to improve AC/DC type microwave oven, and finds that more following new technology are with convenient for using microwave oven:
First, in the above in the AC/DC type microwave oven of Jie Shiing, if, can imagine that AC power and DC power supply all are provided to microwave oven owing to error is connected the AC and DC switch simultaneously, and microwave oven can not proper operation, perhaps makes the electric parts overload of microwave oven.Therefore, need prevent that AC power and DC power supply are input to microwave oven simultaneously.
The second, under the situation of battery, can see that the following general who has surrendered of electric weight is interrupted the work of microwave oven because the user does not find the decline of battery electric quantity as the DC power supply of above-mentioned AC/DC type microwave oven.
At the problems referred to above, the purpose of this invention is to provide a kind of AC/DC type microwave oven with input power management function, be input to microwave oven simultaneously to prevent AC and DC.
Another object of the present invention provides a kind of AC/DC type microwave oven, and it has the input power management function, only to select a power supply in several power supplys.
The 3rd purpose of the present invention provides a kind of AC/DC type microwave oven, and it has the input power management function, with the voltage that detects battery and show this voltage.
The microwave oven with input power management function of above-mentioned purpose of realizing according to the present invention comprises: rotatable converter, and it will be transformed to AC power with DC power supply by the revolving force mode; One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion; By the high drive of high-tension transformer output and the magnetron of launched microwave; And be used to detect from the signal of power select key and prevent the power control unit that the AC and DC power supply is imported simultaneously.Power control unit comprises first power select key, the second source options button that is used to select DC power supply that is used to select public power (electric main), first power supply relay that is used to connect or disconnect high-tension transformer and public power, be used to connect or disconnect the second source relay of DC power supply and rotatable inverter, and be used for corresponding to the microprocessor (microcomputer) of selecting to be switched on or switched off first power supply relay or second source relay from the input signal of first power select key or second source options button.When the input signal from first power select key and second source options button all is imported into microprocessor, microprocessor stops the operation of first power supply relay and second source relay so.Rotatable inverter comprises the motor that produces revolving force, by motor-driven commutator and a plurality of brush that contacts with the outer surface of commutator respectively.Commutator comprises by insulating material makes cylinder, and is divided into the current-carrying part of even number part by non-conductive part by required width, thus two brushes adjacent one another are simultaneously with a side contacts of current-carrying part.The width of each non-conductive part is all more than or equal to the end width of brush.The second source relay is connected with motor DC power supply or disconnects with brush.A pair of brush respect to one another is connected with DC power supply by the second source relay, and respect to one another another links to each other with high-tension transformer to brush.The motor and wherein a pair of brush parallel connection that the second source relay links to each other with DC power supply of passing through.The second source relay is in parallel with capacitor.Between each brush adjacent one another are, be connected with the diode that is used to prevent reverse voltage.
Another object of the present invention realizes that by ac/dc microwave oven of the present invention this microwave oven with input power management function comprises: rotatable converter, and it will be transformed to AC power with DC power supply by the revolving force mode; One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion; By the high drive of high-tension transformer output and the magnetron of launched microwave; An and power control unit that is used to detect public power and DC power supply and only selects a power supply.Power control unit comprises a home key, first power detector that is used to detect public power, the second source checkout gear that is used to detect DC power supply that are used to drive microwave oven, be used to connect or disconnect public power and high-tension transformer first power supply relay, be used to be connected or disconnect the second source relay of DC power supply and rotatable inverter and microprocessor (microcomputer).If first power detector detects public power and is imported into microprocessor from the signal of home key, microprocessor is connected first power supply relay so, if the second source checkout gear detects DC power supply and is imported into microprocessor from the signal of home key, microprocessor is connected the second source relay so.In addition, if first and second power detectors detect public power and DC power supply respectively, and be input to microprocessor from the signal of home key, microprocessor is only connected first power supply relay, thereby microwave oven is driven by public power.
Another object of the present invention is to realize that by the AC/DC type microwave oven with input power management function of the present invention it comprises: rotatable converter, and it will be transformed to AC power with DC power supply by the revolving force mode; One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion; By the high drive of high-tension transformer output and the magnetron of launched microwave; And switch so that only select a switch of a power supply in public power and the DC power supply by the user.If switch switches to a side of public power, the direct current source is disconnected so, if switch switches to a side of DC power supply, the common electrical source is disconnected so.
Another object of the present invention is to realize that by the AC/DC type microwave oven with input power management function of the present invention it comprises: rotatable converter, and it will be transformed to AC power with DC power supply by the revolving force mode; One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion; By the high drive of high-tension transformer output and the magnetron of launched microwave; And be used to detect public power and show a power control unit of this power supply.Power control unit comprises a voltage check device that is used to the magnitude of voltage that detects DC power supply and detect DC power supply, and the microprocessor that is used for showing by display unit the magnitude of voltage that is detected by voltage check device.If the detected magnitude of voltage of voltage check device is lower than reference value, microprocessor stops the operation of microwave oven so.
Therefore,, prevented that AC power and DC power supply are added to microwave oven simultaneously and make the microwave oven misoperation, perhaps made the electric component overload of microwave oven according to the present invention.Owing to only selected an input power supply in AC power and the DC power supply, so microwave oven is worked effectively.The residual voltage of battery is to detect and demonstration by display unit always, thereby has prevented the discharge fully of battery.
By will make above-mentioned purpose and advantage clearer below in conjunction with the accompanying drawing description of this invention.
Fig. 1 is the circuit diagram of a conventional AC type microwave oven;
Fig. 2 is the circuit diagram of another conventional AC/DC type microwave oven;
Fig. 3 is the circuit diagram of the converter that uses in the conventional AC/DC type microwave oven shown in Figure 2;
Fig. 4 is the block diagram of the AC/DC type microwave oven with input power management function of first embodiment of the invention;
Fig. 5 is the circuit diagram of the major part of AC/DC type microwave oven shown in Figure 4.
Fig. 6 and Fig. 7 show the course of work how direct current of the present invention is transformed into alternating current;
Fig. 8 is the block diagram of second embodiment of the invention;
Fig. 9 is the block diagram of third embodiment of the invention;
Figure 10 is the block diagram of fourth embodiment of the invention.
Fig. 4 is the block diagram of the AC/DC type microwave oven with input power management function of first embodiment of the invention, and Fig. 5 is the circuit diagram of the major part of AC/DC type microwave oven shown in Figure 4.
In Fig. 4, label 100 is represented a rotatable inverter, and 110 is motors, and 121-124 is a brush, and the 130th, commutator, the 200th, high voltage transformer, the 300th, power control part branch, MGT are magnetrons.Rotatable inverter 100 comprises commutator 130, brush 121,122,123,124 and motor 110.Each brush 121,122,123,124 contacts with the outer surface of commutator 130.Commutator 130 is rotated by motor 110.Rotatable inverter 100 makes DC power supply be transformed into AC power by the rotation of commutator 130.High-tension transformer 200 receives public powers or by the AC power of rotary converter conversion, and exports required high voltage.High voltage drive and microwave radiation that magnetron MGT is exported by high-tension transformer 200.Power control unit 300 detects from the signal of power select key and prevents that the AC and DC power supply is input to microwave oven simultaneously.Power supply control power supply 300 comprises first power select key 310 that is used to select public power (AC), be used to select the second source options button 320 of DC power supply, be used to connect or first power supply relay 330 of disconnection and high-tension transformer 200 and public power, be used to connect or disconnect the second source relay 350 of DC power supply and rotatable inverter 100, and be used for selecting to be switched on or switched off first power supply relay 330 or second source relay 350 corresponding to input signal from first power select key 310 or second source options button 320.At this, if all be transfused to from the input signal of first power select key 310 and second source options button 320, microprocessor 340 stops the operation of first power supply relay 330 and second source relay 350 so.
In Fig. 5, high-tension transformer 200 comprises one first primary coil 201, one second primary coil 202, one first secondary coil 211 and a second subprime coil 212.First and second primary coils 201 and 202 are around the importation.First and second secondary coils 211 and 212 are around output.The public exchange power supply is imported into first primary coil 201, is imported into second primary coil 202 by the AC power of rotatable inverter 100 conversion.The public exchange power supply is fed to first primary coil 201 of high-tension transformer 200 through the contact RYS1 of first power supply relay 330.DC power supply is provided to rotatable inverter 100 by the contact RYS2 of second source relay 350.Rotatable inverter 100 comprises commutator 130, brush 121,122,123,124 and motor 110.Each brush 121,122,123,124 contacts with the outer surface of commutator 130.Commutator 130 is rotated by motor 110.At this, relative a pair of brush 121 is connected with DC power supply with 123 mutually, and another is connected with second primary coil 202 of high-tension transformer 200 with 124 mutual relative brush 122.Be used to prevent that each diode D1, D2, D3, the D4 of reverse voltage are connected between each adjacent mutually brush 121,122,123,124.Motor 110 is connected to DC power supply with brush in parallel to 121,123.Therefore, when the contact RYS2 of second source relay 350 connected, DC power supply was provided to brush 121,123 and motor 110.The contact RYS2 of capacitor C2 and second source relay 350 is connected in parallel.Commutator 130 comprises a cylinder 131 and is formed on current-carrying part 132 on the outer surface of cylinder 131.The non-conductive part 133 that current-carrying part 131 is had preset width is divided into the even number part, and is connected with mutually adjacent two brushes respectively.High-voltage capacitor HVC, high-voltage diode HVD are connected with second subprime coil 212 with first secondary coil 211 of high-tension transformer 200 with magnetron MGT.Its structure and operating process are identical with prior art, have therefore omitted description of them.
Fig. 6 and 7 shows the course of work how direct current of the present invention is transformed into alternating current.
As shown in Figure 6, electric current is input to top brush 121 from the anode of DC power supply, and flows towards the top of second primary coil 202 from the bottom of second primary coil 202 through the current-carrying part 132 and the left side brush 122 of commutator 130.In addition, electric current is imported into the brush 124 on the right and flow back into the negative terminal of DC power supply through current-carrying part 132 and bottom brush 123.
In Fig. 7, electric current is input to top brush 121 from the anode of DC power supply, and mobile towards the bottom of second primary coil 202 through current-carrying part 132 and the right brush 124 of commutator 130 from the top of second primary coil 202, commutator 130 is by desired angle rotation (for example 90 degree) simultaneously.In addition, electric current is imported into the brush 122 on the left side and flow back into the negative terminal of DC power supply through current-carrying part 132 and bottom brush 123.
Describe the course of work of the AC/DC type microwave oven with management input power supply function of the first embodiment of the present invention in detail below in conjunction with accompanying drawing 4-9.
In the process by DC power supply operation, when second source options button 320 was connected by the user, microprocessor 340 detected from the signal of second source options button 320 and connects the contact RYS2 of second source relay 350.Therefore, offer motor 110 and top brush 121 from the 12V of battery BATT or the DC power supply of 24V through the contact RYS2 of second source relay 350.Capacitor C2 charge or discharge one voltage that is connected in parallel with the contact RYS2 of second source relay 350 causes the motor 110 can rotation smoothly in initial operation.Commutator 130 is rotated by motor 110.Therefore, current-carrying part 132 contacts with each brush 121,122,123,124 successively, thereby DC power supply is become AC power.That is, the top brush 121 of electric current through Fig. 6 of the DC power supply that provides from the battery anode is input to commutator 130.Therefore electric current flows towards left brush 122 through current-carrying part 132, and is input to its top from the bottom of second primary coil 202 of high-tension transformer 200.Then, electric current is through right brush 124, and current-carrying part 132 and bottom brush 123 form circulation to the negative terminal of battery.The DC power supply that provides from the anode of battery BATT is through top brush 121, and current-carrying part 132 and right brush 124 are input to its underpart from the top of second primary coil 202, and commutator 130 rotate with desired angle simultaneously, and for example, shown in Figure 7 90 spend.After this, electric current is through left brush 122, and current-carrying part 132 and bottom brush 123 flow to the negative terminal of battery.Therefore, at each circle (360 degree) of motor 110 rotation commutators 130, the sense of current in second primary coil 202 of high-tension transformer 200 is to change twice up and down successively, thereby produces the AC power of required frequency.Transformer 200 will be provided to the AC power of second primary coil 202 and sense first and second secondary coils 211 and 212.First secondary coil, 211 preheating magnetron MGT, the power supply that second subprime coil 212 will be input to second primary coil 202 is elevated to about 2000V with transformation ratio with being directly proportional.This power supply that is raised further is elevated to about 4000V through high-voltage capacitor HVC and high-voltage diode HVD, is provided to magnetron MGT then.Therefore, from the microwave of magnetron generation 2450MHz, the food in cooking the chamber (not shown) is cooked by microwave.
In the operation of the public power of 220V/110V, when first power select key 310 was connected by the user, microprocessor 340 detected from the signal of first power select key 310 and connects the contact RYS1 of first power supply relay 330.Therefore, the standard public power offers high-tension transformer 200 through the contact RYS1 of first power supply relay 330.Transformer 200 will be provided to the AC power of first primary coil 201 and sense first and second secondary coils 211 and 212.First secondary coil, 211 preheating magnetron MGT, the power supply that second subprime coil 212 will be input to first primary coil 201 is elevated to about 2000V with transformation ratio with being directly proportional.This power supply that is raised further is elevated to about 4000V through high-voltage capacitor HVC and high-voltage diode HVD, is provided to magnetron MGT then.Therefore, from the microwave of magnetron generation 2450MHz, the food in cooking the chamber (not shown) is cooked by microwave.Simultaneously, because if error first and second mains switches 310 and 320 are connected simultaneously, microprocessor 340 detects from the signal of first and second mains switches 310 and 320 and stops the operation of first power supply relay 330 and second source relay 310, thereby prevents that the AC and DC power supply is input to microwave oven simultaneously.
Fig. 8 is the block diagram of second embodiment of the invention.In Fig. 8, the structure of motor 110, rotatable inverter 100, high voltage transformer 200, magnetron MGT is identical with the first embodiment of the present invention with operation.At this, rotatable inverter 100 is provided with brush 121,122,123,124 and commutator 130.High-tension transformer 200 has first and second primary coils 201,202 and first and second secondary coils 211,212.Yet the microwave oven of second embodiment of the invention also comprises a power control unit 400, and it is used to detect public power and DC power supply and only selects a power supply.Power control unit 400 comprises a home key 410, one first power detector 450, a second source checkout gear 460, one first power supply relay 430, a second source relay 440 and a microprocessor 420.Home key 410 drives microwave oven.First power detector 450 detects public power, and second source checkout gear 460 detects DC power supply.First power supply relay 430 is connected public power or disconnects with high-tension transformer 200, second source relay 440 is connected DC power supply or disconnects with rotatable inverter 100.If first power detector 450 detects public power and is input to microprocessor 420 from a signal of home key 410, microprocessor 420 is connected first power supply relay 430 so.If second source checkout gear 460 detects DC power supply and is input to microprocessor 420 from a signal of home key 410, microprocessor 420 is connected second source relays 440 so.In addition, if first power detector 450 and second source checkout gear 460 detect public power and DC power supply respectively, and the signal from home key 410 is imported into microprocessor 420, microprocessor 420 is only connected first power supply relay 430 so, thereby microwave oven is driven by public power.Therefore, microprocessor 420 usefulness, first power detector 450 and second source checkout gear 460 detect public power and DC power supply, and control first power supply relay 430 and second source relay 440, be input to high voltage transformer 200 simultaneously so that prevent public power and DC power supply.
Fig. 9 is the third embodiment of the present invention.In Fig. 9, the structure of motor 110, rotatable inverter 100, high voltage transformer 200, magnetron MGT is identical with the first embodiment of the present invention shown in Figure 4 with operation.Yet the microwave oven of third embodiment of the invention also comprises a switch SW 10.Switch SW 10 is switched by the user, thereby only selects a power supply in public power and the DC power supply.That is, if switch SW 10 switches to the common electrical source, the direct current source then is disconnected so.If switch SW 10 switches to the direct current source, the alternating current source then is disconnected so, thereby prevents that public power and DC power supply are input to high voltage transformer 200 simultaneously.
Figure 10 is the block diagram of fourth embodiment of the invention.In Figure 10, the structure of motor 110, rotatable inverter 100, high voltage transformer 200, magnetron MGT is identical with the first embodiment of the present invention shown in Figure 4 with operation.Yet the microwave oven of fourth embodiment of the invention also comprises a power control unit 500, and it is used to detect the voltage of DC power supply and shows its this voltage.Power control unit 500 comprises a voltage check device 510, a microprocessor 520, a display unit 530 and a power supply relay 540.Voltage check device 510 detects the magnitude of voltage that DC power supply detects DC power supply then.Microprocessor 520 shows the value that is detected by voltage check device 510 by display unit 530.In addition, if the value that voltage check device 510 detects is lower than reference value, power supply relay 540 is disconnected by microprocessor 520 so, causes microwave oven to quit work.Therefore, the user can keep the residual voltage of battery, thereby prevents the discharge fully of battery.
According to ac/dc microwave oven of the present invention, prevented that AC power and DC power supply are added to microwave oven simultaneously and make the microwave oven misoperation, perhaps make the electric device overload of microwave oven.
In addition, according to ac/dc microwave oven of the present invention, only selected an input power supply in AC power and the DC power supply, so microwave oven is worked effectively.
In addition, according to ac/dc microwave oven of the present invention, the residual voltage of battery is to detect and demonstration by display unit always, thereby has prevented the discharge fully of battery.
Describe the while of the present invention at reference most preferred embodiment of the present invention, should see the practician for this area, form of being done and the variation on the details are not left by appended main points of the present invention and scope that claim limited.
Claims (19)
1. AC/DC type microwave oven is characterized in that comprising:
DC power supply is transformed to a rotatable converter of AC power by revolving force;
Receive public power voltage or by a high-tension transformer of the higher voltage of the alternating voltage of rotatable inverter conversion and output;
By the high drive of high-tension transformer output and the magnetron of microwave radiation; And
Be used to detect from the signal of power select key and prevent the power control unit that the AC and DC power supply is imported simultaneously.
2. AC/DC type microwave oven according to claim 1 is characterized in that:
Power control unit comprises first power select key that is used to select public power (interchange); Be used to select the second source options button of DC power supply; Be used to connect or disconnect first power supply relay of high-tension transformer and public power; Be used to connect or disconnect the second source relay of DC power supply and rotatable inverter; And be used for corresponding to the microprocessor of selecting to be switched on or switched off first power supply relay or second source relay from the input signal of first power select key or second source options button.
3. AC/DC type microwave oven according to claim 2 is characterized in that:
When the input signal from first power select key and second source options button all was imported into microprocessor, microprocessor stoped the operation of first power supply relay and second source relay.
4. AC/DC type microwave oven according to claim 2 is characterized in that:
Rotatable inverter comprises the motor that produces revolving force, by motor-driven commutator and a plurality of brush that contacts with the outer surface of commutator respectively.
5. AC/DC type microwave oven according to claim 4 is characterized in that:
Commutator comprises the cylinder of being made by insulating material, and is divided into the current-carrying part of even number part by non-conductive part by required width, thus two brushes adjacent one another are simultaneously with a side contacts of current-carrying part.
6. AC/DC type microwave oven according to claim 5 is characterized in that: the width of each non-conductive part is all more than or equal to the end width of brush.
7. AC/DC type microwave oven according to claim 4 is characterized in that:
The second source relay is connected with motor DC power supply or disconnects with brush.
8. AC/DC type microwave oven according to claim 7 is characterized in that: a pair of brush respect to one another is connected with DC power supply by the second source relay, and respect to one another another links to each other with high-tension transformer to brush.
9. AC/DC type microwave oven according to claim 8 is characterized in that:
The motor and wherein a pair of brush parallel connection that the second source relay links to each other with DC power supply of passing through.
10. AC/DC type microwave oven according to claim 7 is characterized in that: the second source relay is in parallel with capacitor.
11. AC/DC type microwave oven according to claim 4 is characterized in that: between each brush adjacent one another are, be connected with the diode that is used to prevent reverse voltage respectively.
12. an AC/DC type microwave oven is characterized in that comprising:
DC power supply is transformed to a rotatable converter of AC power by revolving force;
One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion;
By the high drive of high-tension transformer output and a magnetron of launched microwave; And
A power control part branch that is used to detect public power and DC power supply and only selects a power supply.
13. AC/DC type microwave oven according to claim 12 is characterized in that:
The power control part branch comprises a home key that is used to drive microwave oven, be used to detect first power detector of public power, be used to detect the second source checkout gear of DC power supply, be used to connect or disconnect first power supply relay of public power and high-tension transformer, be used to connect or disconnect the second source relay of DC power supply and rotatable inverter, and microprocessor, if wherein first power detector detects public power and is imported into microprocessor from the signal of home key, microprocessor is connected first power supply relay, if the second source checkout gear detects DC power supply and is imported into microprocessor from the signal of home key, microprocessor is connected the second source relay.
14. AC/DC type microwave oven according to claim 13 is characterized in that:
If first and second power detectors detect public power and DC power supply respectively, and be input to microprocessor from the signal of home key, microprocessor is only connected first power supply relay, thereby microwave oven is driven by public power.
15. an AC/DC type microwave oven is characterized in that comprising:
DC power supply is transformed to a rotatable converter of AC power by revolving force;
One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion;
By the high drive of high-tension transformer output and a magnetron of microwave radiation; And
Switch so that only select a switch of a power supply in public power and the DC power supply by the user.
16. AC/DC type microwave oven according to claim 15 is characterized in that:
If switch switches to a side of public power, then the direct current source is disconnected, if switch switches to a side of DC power supply, then the common electrical source is disconnected.
17. an AC/DC type microwave oven is characterized in that comprising:
DC power supply is transformed to a rotatable converter of AC power by revolving force;
One high-tension transformer, it receives public power voltage or also exports higher voltage by the alternating voltage of rotatable inverter conversion;
By the high drive of high-tension transformer output and the magnetron of launched microwave; And
Be used to detect the voltage of DC power supply and show a power control part branch of this voltage.
18. AC/DC type microwave oven according to claim 17 is characterized in that:
The power control part branch comprises a voltage check device that is used to the magnitude of voltage that detects DC power supply and detect DC power supply, and the microprocessor that is used for showing by display unit the magnitude of voltage that is detected by voltage check device.
19. AC/DC type microwave oven according to claim 18 is characterized in that:
If the detected magnitude of voltage of voltage check device is lower than reference value, then microprocessor stops the operation of microwave oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100036 CN1242494A (en) | 1998-07-16 | 1999-01-07 | AC/DC type microwave oven |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR28851/98 | 1998-07-16 | ||
| KR28850/98 | 1998-07-16 | ||
| KR28852/98 | 1998-07-16 | ||
| KR28849/98 | 1998-07-16 | ||
| CN 99100036 CN1242494A (en) | 1998-07-16 | 1999-01-07 | AC/DC type microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1242494A true CN1242494A (en) | 2000-01-26 |
Family
ID=5269744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100036 Pending CN1242494A (en) | 1998-07-16 | 1999-01-07 | AC/DC type microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1242494A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922748A (en) * | 2010-07-30 | 2010-12-22 | 无锡同春新能源科技有限公司 | Microwave oven using photovoltaic power system as power supply source |
| CN106413164A (en) * | 2016-09-07 | 2017-02-15 | 广东美的厨房电器制造有限公司 | Control method, control equipment and control system for microwave oven, and microwave oven |
-
1999
- 1999-01-07 CN CN 99100036 patent/CN1242494A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922748A (en) * | 2010-07-30 | 2010-12-22 | 无锡同春新能源科技有限公司 | Microwave oven using photovoltaic power system as power supply source |
| CN106413164A (en) * | 2016-09-07 | 2017-02-15 | 广东美的厨房电器制造有限公司 | Control method, control equipment and control system for microwave oven, and microwave oven |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |