CN2442473Y - Microwave oven for car - Google Patents
Microwave oven for car Download PDFInfo
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- CN2442473Y CN2442473Y CN00218854U CN00218854U CN2442473Y CN 2442473 Y CN2442473 Y CN 2442473Y CN 00218854 U CN00218854 U CN 00218854U CN 00218854 U CN00218854 U CN 00218854U CN 2442473 Y CN2442473 Y CN 2442473Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The utility model relates to a microwave oven for cars, which comprises a microwave oven casing; two zones are divided in the casing; a control circuit is arranged in one of the zones; a cavity used for cooking foods is arranged in the other zone. The utility model is characterized in that the control circuit comprises an inverse connecting protection circuit, an inverse power source which is connected with the back side of the inverse connecting protection circuit and a working power source, wherein, the inverse power source supplies work to a magnetron; the inverse power source comprises a DC/AC converting unit and a voltage-multiply direct current boosting unit. The utility model has the advantages of simple structure, small volume, reliable use and less occupation of installation position and each of indexes can reach the required index of a nation.
Description
The utility model relates to the DC type microwave oven that can use the Vehicular accumulator cell power supply, and has the function of management input power supply.
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 2000V-4000V, magnetron is encouraged by this high voltage, and launch the microwave of required frequency, microwave oscillation is included in the moist molecule in the food, therefore, food is cooked by the frictional heat that is produced by moist molecular oscillation.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, is raised or the alternating voltage that descends is fed to the output of transformer.Usually, conventional microwave oven design is driven by AC power.
Fig. 1 is to use the circuit theory diagrams of the conventional microwave oven of AC power.Label 10 expression high-tension transformers in Fig. 1, the 11st, primary coil, 12 is first secondary coils, the 13rd, the second subprime coil.
The course of work of this routine microwave oven is: 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, senses 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 by the driven of 4000V and launch the microwave of 2450MHz (megahertz).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, someone has proposed a kind of microwave oven that uses in the place that does not have AC power, it will adopt the supply convertor of semiconductor device to be connected with microwave oven, so that DC power supply is transformed into AC power, maybe this converter will be contained in the microwave oven.
Fig. 2 is the circuit diagram of this kind 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 the output 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 that circuits for triggering 1, a plurality of thyristor th1 and th2 switch to conducting or disconnection by the switching manipulation of circuits for triggering 1, therefore the electric current output in second primary coil 14 of high-tension transformer 10 has 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: promptly, the desired high voltage of output magnetron because converter need provide a plurality of more expensive semiconductor device is so production cost rises.
The purpose of this utility model is in order to overcome above-mentioned shortcoming, and the reducible automobile-used type microwave oven of a kind of production cost that provides; This automobile-used type microwave oven, output microwave that can be stable, wherein the consumption rate of semiconductor device reduces, and the life-span of battery also prolongs;
The technical scheme that realizes the utility model above-mentioned purpose is: microwave oven for automobile, comprise micro-wave oven casing, and separation is provided with two zones in this housing, is provided with control circuit in the zone, and this control circuit is connected with magnetron; Be provided with the cavity of a cooked food in another zone, this cavity outside is provided with shield door; It is characterized in that described control circuit comprises: the inverter and the special circuit working power that offer magnetron work; Described inverter comprises: an AC/DC converting unit and the DC boosting of multiplication of voltage more than a unit; The AC/DC converting unit comprises: a DC/AC translation circuit and an output filter circuit that the DC/DC translation circuit that an input filter circuit, is made of prime oscillating circuit and prime control unit and primary, is made of back level oscillating circuit and back level control unit; Many multiplication of voltages DC boosting unit comprises level of transformer and voltage-multiplying circuit more than; Described power source special comprises two groups by transformer two DC power supply forming of twice levels and two rectification circuits in addition, offers back level oscillating circuit and back grade control unit respectively;
The output of the output of described prime filter circuit and prime control unit is connected with the prime oscillating circuit, the prime vibration is connected with primary, coupling by the transformer time utmost point, the current energy that has changed is transmitted backward, wherein, first directly imports many multiplication of voltage upgrading circuit by a level coil, forms and offers the high-tension electricity that magnetron produces the microwave use; Second portion with by offering back level inversion oscillating circuit after another secondary coil rectification; Third part is by offering back level control unit behind another secondary coil rectifying and wave-filtering again.
Above-mentioned microwave oven for automobile, wherein, described prime control unit is made of an integration module, and this integration module comprises an overcurrent comparison circuit, under-voltage comparison circuit, temperature comparison circuit, overvoltage crowbar, shutoff restore circuit, frequency modulation circuit, the wide modulation circuit of ripple, power control circuit and drive circuit A and drive circuit B; Current signal is input to the overcurrent comparison circuit, power supply voltage signal is input to overvoltage crowbar and under-voltage comparison circuit respectively, exports a signal respectively to the wide modulation circuit of ripple from overcurrent comparison circuit, under-voltage comparison circuit, overvoltage crowbar and frequency modulation circuit; Temperature signal outputs to under-voltage comparison circuit through temperature comparison circuit, under-voltage comparison circuit with turn-off that restore circuit is two-way to be connected, under-voltage comparison circuit is exported an alarm signal to alarm simultaneously; The wide modulation circuit of ripple output two paths of signals branch is clipped to drive circuit A and drive circuit B, and power signal outputs to drive circuit B by power control circuit simultaneously, and drive circuit A and drive circuit B output to the prime oscillating circuit.
Above-mentioned microwave oven for automobile, wherein, described back level control unit is made of an integration module, and it comprises a voltage stabilizing feedback circuit, the wide modulation circuit of ripple, frequency modulation circuit and drive circuit C, drive circuit D; Frequency modulation circuit produces an operating frequency to the wide modulation circuit of ripple, and the wide modulation circuit output of ripple two paths of signals is to drive circuit C and drive circuit D; The output of drive circuit C and drive circuit D drives back level oscillating circuit respectively, it is exported one respectively and feeds back signal to the voltage stabilizing feedback circuit simultaneously, this voltage stabilizing feedback circuit outputs to the wide modulation circuit of ripple, after modulating together, the signal that the wide modulation circuit of ripple is exported the Xinjiang and the frequency modulation circuit of the output of voltage stabilizing feedback circuit outputs to drive circuit C and drive circuit D more respectively, so circulation.
Above-mentioned microwave oven for automobile, wherein, a push-pull circuit and a primary that described prime oscillating circuit is made up of two field effect transistor constitute.
Above-mentioned microwave oven for automobile, wherein, the full-bridge type translation circuit that described back level oscillating circuit is made up of four field effect transistor is formed.
Above-mentioned microwave oven for automobile, wherein, described control circuit also comprises a contrary protective circuit that connects, this is contrary to connect protective circuit and is made of a backward diode that is connected before the input filter circuit.
Above-mentioned microwave oven for automobile, wherein, described input filter circuit is made of a filter capacitor.
Above-mentioned microwave oven for automobile, wherein, described many multiplication of voltages booster circuit is made of electric capacity and diode.
Because the utility model has adopted above technical scheme, uses in carrier, has the efficient height, volume is little, low noise and other advantages, and energy savings.
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the circuit theory diagrams of the conventional microwave oven of prior art.
Fig. 2 is the circuit theory diagrams of prior art AC-DC conversion microwave oven.
Fig. 3 is the road electrical schematic diagram that adopts the semiconductor device converter in Fig. 2 microwave oven.
Fig. 4 is the circuit block diagram of the utility model embodiment control circuit.
Fig. 5 is the circuit theory diagrams of the utility model embodiment control circuit.
Fig. 6 is the functional-block diagram of the utility model prime control unit.
Fig. 7 is the functional-block diagram of level control unit behind the utility model.
See also Fig. 4, a kind of microwave oven for automobile of the utility model comprises micro-wave oven casing, separates to be provided with two zones in this housing, is provided with control circuit in the zone, and this control circuit comprises a magnetron; Be provided with the cavity of a cooked food in another zone, this cavity outside is provided with shield door; Described control circuit comprises: the inverter and the working power that offer magnetron work; Described inverter comprises: an AC/DC converting unit and the DC boosting of multiplication of voltage more than a unit; The AC/DC converting unit comprises: a DC/AC translation circuit and an output filter circuit that the DC/DC translation circuit that an input filter circuit, is made of prime oscillating circuit and prime control unit and primary, is made of back level oscillating circuit and back level control unit; Many multiplication of voltages DC voltage booster circuit comprises level of transformer and voltage-multiplying circuit more than; Described working power comprises two groups by transformer two DC power supply forming of twice levels and two rectification circuits in addition, offers back level oscillating circuit and back grade control unit respectively.Comprise that also one contrary connects protective circuit, be connected input filter circuit before.
Fig. 5 is the electrical schematic diagram of the utility model embodiment control circuit.
Contrary connect protective circuit and is made up of diode D1 and fuse F1, when the electrode of storage battery on power lead and the car was pressed the correct way access, D1 reverse blocking, electric current be circuit supply rearwards smoothly.If both positive and negative polarity is connect instead because of carelessness, diode D1 forward conduction, electric current refluxes via D1, F1, and circuit supply no longer rearwards, thereby plays the purpose of protection other electron component.
Power supply prime filter circuit is a filter capacitor E1, and its effect is to carrying out smothing filtering from 12V automobile power source or spike disturbing pulse, for the DC-DC transducer provides quality direct current preferably.The first prevents to import power supply and scurries into noise, and it two is to suppress the noise that Switching Power Supply produces to feed back to the input power supply.
The prime oscillator is made up of the same push-pull type separate excitation translation circuit of quadruplet, wherein the head and the tail with No. four transformers connect successively, from the end of the head end of first transformer and the 4th transformer respectively extract out a end of a thread by transformer secondary output coil T12 coupling to the many voltage-multiplying circuits power supplies of high voltage package.Working condition when present embodiment only provides one tunnel as shown in the figure, now its course of work is described below: this converter mainly is that (other three groups of push-pull type separate excitation converters are respectively by field effect transistor Q112, Q212 for the push-pull type separate excitation converter that constitutes of the primary coil T11 by two MOSFET field effect transistor Q111, Q211 and transformer T1, field effect transistor Q113, Q213, field effect transistor Q114, Q214 form).Wherein the power MOSFET field effect transistor is an one pole type device, is by the majority carrier conduction current, does not have charge carrier to accumulate and time of delay of producing, and switching speed is fast, and switching time is short.
Field effect transistor transistor Q111 and Q211 are subjected to the drive signal control of sending here from the prime control unit and make to replace break-make and work.Bearing power is provided all for the transformer secondary output lateral coil during arbitrary transistor turns, when two transistors all end, plays afterflow effect in short-term by capacitor C2, simultaneously, C2 mainly plays the effect of receiving to noise voltage in the circuit.When exporting high level signal from prime control unit 13 pin, and Q11 enters conducting and Q21 ends during 12 pin output low levels, electric current is formed current circuit by anode through transformer centre cap, transformer top and field effect transistor Q11 and is flowed from bottom to top, and the transformer secondary output coil also produces from bottom to top an electric current like this.But from prime control unit 13 and 12 pin output pulse upset appears subsequently, i.e. 13 pin output low levels, and 12 pin become high level.This moment Q11 enter by and the Q21 conducting, electric current will flow out through the transformer centre cap from anode, through the main coil bottom and Q21 to form current circuit mobile from top to down.Also produced an electric current that flows from top to down at the transformer secondary output output equally.Just taken place once to change in transformer output end current direction like this, along with the alternately break-make of Q11, Q21, in the also alternately variation of electric current of transformation output, so just finished from direct current to the variation that exchanges one-period.Lotus root by the transformer secondary output coil is closed, and the current energy that has changed is continued to transmit backward.Wherein, first directly imports many multiplication of voltage upgrading circuit by secondary coil T12, can produce the high-tension electricity that microwave uses for magnetron to form; Second portion offers back level inversion oscillating circuit behind the rectifying and wave-filtering again by secondary coil T13; Third part offers back level control unit behind the rectifying and wave-filtering again by secondary coil T14.
The quality that enters the drive signal waveform of grid will directly influence the output current quality of converter, and the break-make of field effect transistor is flowed into the control of its grid current.The generation of drive signal will be narrated in the prime control unit.
The full-bridge type translation circuit that back level oscillating circuit is made up of 4 switching transistor M1, M2, M3, M4.Replace break-make work from the direct current of prime input by M1, M3 and M2, M4 and finish direct current to the variation that exchanges, the same with the prime inverter circuit, its gate driver circuit by Dr2 after the level control module control (Dr2 has special narration thereafter).After filter capacitor C7 filtering, just can offer AC load uses such as microwave oven, fan from the alternating current of DC/AC output.
Fig. 6 is the functional-block diagram of the utility model prime control unit.This prime control unit comprises an overcurrent comparison circuit, under-voltage comparison circuit, temperature comparison circuit, overvoltage crowbar, shutoff restore circuit, frequency modulation circuit, the wide modulation circuit of ripple, power control circuit and drive circuit A and drive circuit B; Current signal is input to the overcurrent comparison circuit, power supply voltage signal is input to overvoltage crowbar and under-voltage comparison circuit respectively, exports a signal respectively to the wide modulation circuit of ripple from overcurrent comparison circuit, under-voltage comparison circuit, overvoltage crowbar and frequency modulation circuit; Temperature signal outputs to under-voltage comparison circuit through temperature comparison circuit, under-voltage comparison circuit with turn-off that restore circuit is two-way to be connected, under-voltage comparison circuit is exported an alarm signal to alarm simultaneously; The wide modulation circuit of ripple output two paths of signals branch is clipped to drive circuit A and drive circuit B, and power signal outputs to drive circuit B by power control circuit simultaneously, and drive circuit A and drive circuit B output to the prime oscillating circuit.
Described prime control unit is made of an integration module, its model is 33XAL999, the centre cap of the variable potentiometer P1 of its 14 pin and prime oscillating circuit, 13 pin, 12 pin respectively with the grid of prime oscillating circuit Q11, Q21 field-effect transistor, the source electrode of Q11, Q21 field-effect transistor connects the two ends of the primary coil of transformer T respectively.Because have certain relation between field effect transistor gate drive current and the output of leakage level, the variation of grid input current has also just been reacted in the variation of drain current.The grid current signal just is converted into a voltage signal that can compare like this.In Fig. 6; electric current leaks level output behind resistor R 1, P1, R3 from the prime field effect transistor; take a sample from the P1 point; be input to the prime control unit by Is port (14 pin) again; compare in the overcurrent comparing unit, if the drive current that enters grid is greater than setting thresholding, then the overcurrent comparator can provide a high level signal; force the wide adjuster of ripple to be tending towards off state, so realize the function of overcurrent protection.
The voltage signal of obtaining from power input enters the prime control unit from power port, be further divided into two-way, one the tunnel sends into overvoltage protector after sampling compares, if the supply voltage amplitude surpasses voltage limit value S, then voltage protection unit also can provide a high level signal in the wide modulating unit of ripple, forces the wide adjuster of ripple to turn-off; Another road is admitted to under-voltage comparing unit, when voltage is lower than set point S1, under-voltage comparing unit provides a high level signal to alarm, send the low pressure alarming signal, if input voltage continues to drop to when being lower than set point S2, the undervoltage warning unit also can provide a high level signal to the wide modulating unit of ripple, makes its shutoff.
When circuit is crossed low the shutoff because of input voltage, under-voltage comparing unit provides a level signal simultaneously, make and recover the starting unit circuit working, and after the restore circuit work, to make the benchmark of under-voltage comparing unit change, be input voltage must be higher than a certain set point S3 the time,, thereby enter operate as normal because the inner circuit that turn-offs could recover to start voluntarily.The general S3 value of setting is greater than the S1 value, the purpose of doing like this be for fear of circuit in the frequent break-make in shutoff voltage point place, play each components and parts effect of protective circuit.
When the circuit working temperature is too high, the thermistor that is arranged in circuit will work, and its resistance raises with temperature and becomes greatly, react for the supply voltage sampling value to diminish.Select suitable thermistor, just temperature signal can be converted into voltage signal.Send into under-voltage comparing unit then.Just can realize overheat protector control according to foregoing reason.
In Fig. 5, S1 is a power control switching, and when promptly selecting S1, S1 will do regularly interruption work.When S1 closes, will give power control port one low level signal of prime control unit; Otherwise, will provide high level signal if S1 disconnects.When the power control port of prime control unit receives a low voltage signal with operate as normal.Have only when the power control port of prime control unit receives a high level signal, just can provide a high level signal driving 2 is turn-offed, Q13, Q23 and Q14, Q24 do not quit work because drive.The induced potential that transformer secondary output coil T12 produces also can reduce.Magnetron just can not obtain it and produce the necessary high pressure of microwave, so stop microwave radiation.By just can control the launch time of actual microwave in the unit interval to the adjusting of timing switch, also both finished the power control of microwave oven like this.
Pulse modulation method not only can improve the waveform of output voltage, but also can regulate the output voltage effective value of inverter easily.Can utilize the pulse control circuit to finish, this circuit is the prior art of a maturation, can produce a string output amplitude and stablize and the adjustable pulse sequence of pulse duration.
Back level control unit groundwork principle and prime control unit are basic identical, just only take out the AC output voltage as feedback voltage in this unit from the full-bridge oscillating circuit, feed back the control that realizes output voltage stabilization by this.Its function diagram such as Fig. 7.Described back level control unit comprises a voltage stabilizing feedback circuit, the wide modulation circuit of ripple, frequency modulation circuit and drive circuit C, drive circuit D; Frequency modulation circuit produces an operating frequency to the wide modulation circuit of ripple, and the wide modulation circuit output of ripple two paths of signals is to drive circuit C and drive circuit D; The output of drive circuit C and drive circuit D drives back level oscillating circuit respectively, it is exported one respectively and feeds back signal to the voltage stabilizing feedback circuit simultaneously, this voltage stabilizing feedback circuit outputs to the wide modulation circuit of ripple, after modulating together, the signal that the wide modulation circuit of ripple is exported the Xinjiang and the frequency modulation circuit of the output of voltage stabilizing feedback circuit outputs to drive circuit C and drive circuit D more respectively, so circulation.
Described back level control unit is made of an integration module, and its model is: 983SINED, its 26 pin and field effect transistor M
4Grid connect 24 pin and field effect transistor M
1Grid connect 22 pin and field effect transistor M
2Grid connect 21 pin and field effect transistor M
3Grid connect; 25 pin and field effect transistor M
4Drain electrode and field effect transistor M
3Source electrode connect; 23 pin and field effect transistor M
1Drain electrode and field effect transistor M
2Source electrode connect; Field effect transistor M
1Drain electrode and field effect transistor M
4Source electrode power to AC load such as fans.The operation principle of back level control unit is: back level control unit comprises a voltage stabilizing feedback circuit, the wide modulation circuit of ripple, frequency modulation circuit and drive circuit C, drive circuit D; Frequency modulation circuit produces an operating frequency to the wide modulation circuit of ripple, and the wide modulation circuit output of ripple two paths of signals is to drive circuit C and drive circuit D; The output of drive circuit C and drive circuit D drives back level oscillating circuit respectively, it is exported one respectively and feeds back signal to the voltage stabilizing feedback circuit simultaneously, this voltage stabilizing feedback circuit outputs to the wide modulation circuit of ripple, after modulating together, the signal that the wide modulation circuit of ripple is exported the signal and the frequency modulation circuit of the output of voltage stabilizing feedback circuit outputs to drive circuit C and drive circuit D more respectively, so circulation.
Many letter straightening stream booster circuits, direct current 12V is after the prime conversion, and the electric current that is coupled out from transformer secondary output coil T12 is sent to high voltage package HV, through many voltage-multiplying circuits of high voltage package HV unit, voltage is increased to the 4000V direct current, uses for the magnetron generation microwave of microwave oven.The voltage feedback signal of high voltage package is sent into the Tc port (2 pin) of prime control unit behind diode, resistance R 2 and the transistor N1 of a pair of reversal connection.If overtension D19 is reverse-conducting, transistor N1 as described in the overheat protector of front, the inner shutoff will occur under base current control and saturation conduction ground connection makes that Tc line voltage is dragged down subsequently, realizes magnetron function such as protection automatically.
Two groups of DC power supply i.e. the power supply of rectification and be respectively applied for back level vibration and the back level control unit work of providing from the power supply of transformer secondary output T14 rectifiable behind the transformer secondary output T13.The power supply of back level vibration output provides the power supply of electrical equipment such as electric fan, illumination for example of all ac electric apparatus in this microwave oven.
The utility model is simple in structure, volume is small and exquisite, uses reliably, use the position that takies in the compartment few, and its every index can both reach the index of national regulation.
Claims (8)
1, microwave oven for automobile comprises micro-wave oven casing, separates to be provided with two zones in this housing, is provided with control circuit in the zone, and this control circuit is connected with magnetron; Be provided with the cavity of a cooked food in another zone, this cavity outside is provided with shield door; It is characterized in that described control circuit comprises: the inverter and the special circuit working power that offer magnetron work; Described inverter comprises: an AC/DC converting unit and the DC boosting of multiplication of voltage more than a unit; The AC/DC converting unit comprises: a DC/AC translation circuit and an output filter circuit that the DC/DC translation circuit that an input filter circuit, is made of prime oscillating circuit and prime control unit and primary, is made of back level oscillating circuit and back level control unit; Many multiplication of voltages DC boosting unit comprises level of transformer and voltage-multiplying circuit more than; Described power source special comprises two groups by transformer two DC power supply forming of twice levels and two rectification circuits in addition, offers back level oscillating circuit and back grade control unit respectively;
The output of the output of described prime filter circuit and prime control unit is connected with the prime oscillating circuit, the prime vibration is connected with primary, coupling by the transformer time utmost point, the current energy that has changed is transmitted backward, wherein, first directly imports many multiplication of voltage upgrading circuit by a level coil, forms and offers the high-tension electricity that magnetron produces the microwave use; Second portion with by offering back level inversion oscillating circuit after another secondary coil rectification; Third part is by offering back level control unit behind another secondary coil rectifying and wave-filtering again.
2. microwave oven for automobile according to claim 1, it is characterized in that, described prime control unit is made of an integration module, and this integration module comprises an overcurrent comparison circuit, under-voltage comparison circuit, temperature comparison circuit, overvoltage crowbar, shutoff restore circuit, frequency modulation circuit, the wide modulation circuit of ripple, power control circuit and drive circuit A and drive circuit B; Current signal is input to the overcurrent comparison circuit, power supply voltage signal is input to overvoltage crowbar and under-voltage comparison circuit respectively, exports a signal respectively to the wide modulation circuit of ripple from overcurrent comparison circuit, under-voltage comparison circuit, overvoltage crowbar and frequency modulation circuit; Temperature signal outputs to under-voltage comparison circuit through temperature comparison circuit, under-voltage comparison circuit with turn-off that restore circuit is two-way to be connected, under-voltage comparison circuit is exported an alarm signal to alarm simultaneously; The wide modulation circuit of ripple output two paths of signals branch is clipped to drive circuit A and drive circuit B, and power signal outputs to drive circuit B by power control circuit simultaneously, and drive circuit A and drive circuit B output to the prime oscillating circuit.
3, microwave oven for automobile according to claim 1 is characterized in that, described back level control unit is made of an integration module, and it comprises a voltage stabilizing feedback circuit, the wide modulation circuit of ripple, frequency modulation circuit and drive circuit C, drive circuit D; Frequency modulation circuit produces an operating frequency to the wide modulation circuit of ripple, and the wide modulation circuit output of ripple two paths of signals is to drive circuit C and drive circuit D; The output of drive circuit C and drive circuit D drives back level oscillating circuit respectively, it is exported one respectively and feeds back signal to the voltage stabilizing feedback circuit simultaneously, this voltage stabilizing feedback circuit outputs to the wide modulation circuit of ripple, after modulating together, the signal that the wide modulation circuit of ripple is exported the Xinjiang and the frequency modulation circuit of the output of voltage stabilizing feedback circuit outputs to drive circuit C and drive circuit D more respectively, so circulation.
4, microwave oven for automobile according to claim 1 is characterized in that, a push-pull circuit and a primary that described prime oscillating circuit is made up of two field effect transistor constitute.
5, microwave oven for automobile according to claim 1 is characterized in that, the full-bridge type translation circuit that described back level oscillating circuit is made up of four field effect transistor is formed.
6, microwave oven for automobile according to claim 1 is characterized in that, described control circuit also comprises a contrary protective circuit that connects, and this contrary connection circuit is made of a backward diode that is connected before the input filter circuit.
7, microwave oven for automobile according to claim 1 is characterized in that, described input filter circuit is made of a filter capacitor.
8, microwave oven for automobile according to claim 1 is characterized in that, described many multiplication of voltages booster circuit is made of electric capacity and diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00218854U CN2442473Y (en) | 2000-08-15 | 2000-08-15 | Microwave oven for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00218854U CN2442473Y (en) | 2000-08-15 | 2000-08-15 | Microwave oven for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2442473Y true CN2442473Y (en) | 2001-08-08 |
Family
ID=33584153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00218854U Expired - Lifetime CN2442473Y (en) | 2000-08-15 | 2000-08-15 | Microwave oven for car |
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| Country | Link |
|---|---|
| CN (1) | CN2442473Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1679217B (en) * | 2002-07-03 | 2010-12-08 | 熔融Uv体系股份有限公司 | Apparatus and method for powering multiple magnetrons using a single power supply |
| CN102752891A (en) * | 2012-06-05 | 2012-10-24 | 奇瑞汽车股份有限公司 | Vehicular microwave device |
| CN104764301A (en) * | 2015-04-23 | 2015-07-08 | 江南大学 | Microwave drying system capable of adjusting continuous linearity of output power |
| CN105186474A (en) * | 2015-07-22 | 2015-12-23 | 濮阳市立圆汽车电器有限公司 | Protection circuit |
-
2000
- 2000-08-15 CN CN00218854U patent/CN2442473Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1679217B (en) * | 2002-07-03 | 2010-12-08 | 熔融Uv体系股份有限公司 | Apparatus and method for powering multiple magnetrons using a single power supply |
| CN102752891A (en) * | 2012-06-05 | 2012-10-24 | 奇瑞汽车股份有限公司 | Vehicular microwave device |
| CN102752891B (en) * | 2012-06-05 | 2014-11-26 | 奇瑞汽车股份有限公司 | Vehicular microwave device |
| CN104764301A (en) * | 2015-04-23 | 2015-07-08 | 江南大学 | Microwave drying system capable of adjusting continuous linearity of output power |
| CN104764301B (en) * | 2015-04-23 | 2016-10-26 | 江南大学 | A kind of adjustable microwave drying system of output continuously linear |
| CN105186474A (en) * | 2015-07-22 | 2015-12-23 | 濮阳市立圆汽车电器有限公司 | Protection circuit |
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