CN202455577U

CN202455577U - Microwave oven

Info

Publication number: CN202455577U
Application number: CN2012200502396U
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-18
Filing date: 2012-02-16
Publication date: 2012-09-26
Anticipated expiration: 2022-02-16
Also published as: CN202328414U; CN202385323U; CN202455576U; CN202334974U; CN202385322U; CN202385321U

Abstract

The utility model relates to a microwave oven which comprises a high-voltage transformer, a magnetic control pipe, a high-voltage capacitor and a high-voltage diode. The high-voltage transformer further comprises a frame, a primary winding, a secondary winding and a lamp filament winding. The secondary winding, the high-voltage diode and the high-voltage capacitor form a half-wave double-voltage circuit, a cathode of the magnetic control pipe and the lamp filament winding are connected to form a heating return circuit, and a cutter for processing magnetic control pipe pulse wave is respectively arranged between an anode of the magnetic control pipe and the high-voltage capacitor in a circuit of the heating return circuit through the secondary winding and between the high-voltage capacitor and the heating return circuit. The microwave oven is reasonable in design, by arranging the cutters for processing reverse pulse caused when the magnetic control pipe is started between the anode of the magnetic control pipe and the high-voltage capacitor in the circuit of the heating return circuit through the secondary winding and between the high-voltage capacitor and the heating return circuit, voltage-resisting requirements of the high-voltage capacitor can be reduced. By adding a voltage on-off controller and a phase shifter in the high-voltage capacitor, the efficiency of the transformer is improved. By increasing one transformer, output power of the magnetic control pipe is greatly increased.

Description

Microwave oven

Technical field

The utility model relates to a kind of microwave oven.

Background technology

About secondary general the output 2000VAC of existing a kind of high voltage transformer of microwave oven; And secondary winding one end is through contacting ground connection with transformer framework; Therefore have a half-wave voltage-multiplying circuit in the secondary back of microwave oven; Earlier to the charging of the electric capacity in the half-wave voltage-multiplying circuit, the output when utilizing other half reversal periods of high-tension transformer then, stack had originally charged the voltage that the electric capacity of electricity forms about a 4000VAC and had made its work to magnetron high-tension transformer in the half period of a sine wave; For the high temperature that prevents high-tension transformer causes security incidents such as winding is on fire; General high-voltage fuse component of series connection between high-tension transformer secondary winding and high-voltage capacitance, when image height taking place press diode breakdown etc. unusual, the electric current of secondary winding surpasses the current limit of high-voltage fuse; Fuse will burn to play a protective role; Since magnetron the moment that starts high energy produce one 2～30,000 volts reverse impulse, pass through the negative pole that the high-voltage capacitance secondary winding is got back to magnetron from the positive pole of magnetron, in order to deal with the reverse impulse of magnetron; High-tension transformer and high-voltage capacitance all have special requirement of withstand voltage, and this has just increased the cost of microwave oven.

Summary of the invention

Therefore, first purpose of the utility model is to provide a kind of and can handles the reverse impulse of magnetron and the microwave oven that can reduce cost.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of microwave oven; Comprise high-tension transformer, magnetron, high-voltage capacitance and high-voltage diode; High-tension transformer comprises skeleton, elementary winding, secondary winding and Filament Winding again; Secondary winding, high-voltage diode and high-voltage capacitance constitute the half-wave voltage-multiplying circuit, and negative electrode and the Filament Winding of magnetron connect to form heating circuit, said anode of magnetron through the high-voltage capacitance of secondary winding in the circuit of heating circuit to the cropper that is provided with processing magnetron pulse ripple between the heating circuit.

Technique scheme also can be done following further perfect.

Said cropper is located at and connects between half-wave voltage-multiplying circuit and the heating circuit, and it is a diode, and input is connected with heating circuit, and output is connected with the half-wave voltage-multiplying circuit.

Said cropper is located at high-voltage capacitance between the heating circuit, and it is that diode and silicon controlled reverse parallel connection are formed, and the silicon controlled input is connected with high-voltage capacitance.

Be provided with phase shifter in the said heating circuit.

Be provided with the voltage on-off controller in the said half-wave voltage-multiplying circuit.

Second purpose of the utility model is to provide a kind of can handle the reverse impulse of magnetron, can reduce cost and microwave oven that further improve the magnetron power output.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of microwave oven; Comprise high-tension transformer, transformer, magnetron, high-voltage capacitance and high-voltage diode; High-tension transformer comprises skeleton, elementary winding, secondary winding again; Secondary winding, high-voltage diode and high-voltage capacitance constitute the half-wave voltage-multiplying circuit, said anode of magnetron through the high-voltage capacitance of secondary winding in the circuit of magnetron cathode to being provided with the cropper of handling the magnetron pulse ripple between the heating circuit.

Transformer comprises input winding and output winding, and the output winding is electrically connected with magnetron cathode.

The utility model is reasonable in design, through at the reverse impulse of anode of magnetron when secondary winding is provided with cropper and handles magnetron and start to the high-voltage capacitance in the circuit of heating circuit between heating circuit, thereby can reduce the requirement of withstand voltage of high-voltage capacitance.Through in high-tension transformer, increasing voltage on-off controller and phase shifter, improve transformer efficiency, through increasing the power output that a transformer improves magnetron greatly.

Description of drawings

Fig. 1 is the high-pressure section electric diagram of embodiment 1.

Fig. 2 is the high-pressure section electric diagram of embodiment 2.

Fig. 3 is the high-pressure section electric diagram of embodiment 3.

Fig. 4 is the high-pressure section electric diagram of embodiment 4.

Fig. 5 is the high-pressure section electric diagram of embodiment 5.

Fig. 6 is the high-pressure section electric diagram of embodiment 6.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is done further to detail.

Embodiment 1, in conjunction with Fig. 1, and a kind of microwave oven; Comprise high-tension transformer 1, high-voltage fuse 8, high-voltage capacitance 9, high-voltage diode 10, magnetron 11, high-tension transformer 1 comprises that again elementary winding 2, secondary winding 3 and Filament Winding 4, elementary winding have

input

5,6,7, and secondary winding 3, high-voltage fuse 8, high-voltage diode 10 and high-voltage capacitance 9 constitute the half-wave voltage-multiplying circuits; The negative electrode of magnetron 11 and Filament Winding 4 connect to form heating circuit; Heating circuit is connected with the input of high-voltage diode 10, and an end ground connection of the output of high-voltage diode 10 and secondary winding 3 is provided with the cropper 12 of handling the magnetron pulse ripple between the input of heating circuit and high-voltage diode 10; Cropper 12 is constituted by a diode; The input of diode is connected with heating circuit, and output is connected with the input of high-voltage diode 10, when magnetron 11 starts; Reverse impulse enters into cropper 12 through secondary winding 3; Cropper 12 has ended pulse, makes the energy of pulse load on the cropper 12, reduces the influence to high-voltage capacitance 9.

Embodiment 2, and in conjunction with Fig. 2, the difference of embodiment 2 and embodiment 1 is the location swap of secondary winding 3 and high-voltage capacitance 9.

Embodiment 3; In conjunction with Fig. 3; The difference of embodiment 3 and embodiment 1 is that cropper 22 is placed on high-voltage capacitance 9 between the high-voltage diode 10, and cropper 12 is made up of diode 24 and controllable silicon 23 reverse parallel connections, and the input of controllable silicon 23 is connected with high-voltage capacitance 9 one ends.

Embodiment 4, and in conjunction with Fig. 4, embodiment 4 is in heating circuit, to increase phase shifter 14 with the difference of embodiment 1, between high-voltage fuse 8 and high-voltage capacitance 9, increases voltage on-off controller 15.

Embodiment 5; In conjunction with Fig. 5; A kind of microwave oven comprises high-tension transformer 1, transformer 16, high-voltage fuse 8, high-voltage capacitance 9, high-voltage diode 10, magnetron 11, and high-tension transformer 1 comprises elementary winding 2, secondary winding 3 again; Elementary winding has input 5,7, and secondary winding 3, high-voltage fuse 8, high-voltage diode 10 and high-voltage capacitance 9 constitute the half-wave voltage-multiplying circuit.

Transformer 16 comprises input winding 17 and output winding 18, and output winding 18 constitutes heating circuit with magnetron 11 negative electrodes.Input winding 17 has input 19,20.

The input of the high-voltage diode 10 in heating circuit and the half-wave voltage-multiplying circuit is connected; Cropper 12 is connected between the input of heating circuit and high-voltage diode 10; The input of cropper 12 is connected with heating circuit, and output is connected with the input of high-voltage diode 12.

As for increase in the present embodiment phase shifter, voltage on-off controller, and the variation of cropper all consistent with the foregoing description structural principle, no longer tire out at this and to state.

Embodiment 6, and in conjunction with Fig. 6, embodiment 6 is that with the difference of embodiment 1 two ends of cropper 12 are parallel with the load 21 that absorbs surge.Cropper 12 is by surge when surge is come, and surge just arrives negative electrodes through load 21, because the effect of dividing potential drop is played in load 21 in circuit, so that reduction high-voltage capacitance 9 is born is withstand voltage.

The purpose of this patent is to increase the pulse that produces in the time of stoping magnetron to start forms the impulse wave in loop from the anode to the negative electrode cropper; This device be placed on anode of magnetron through the high-voltage capacitance of secondary winding in the circuit of heating circuit between the heating circuit; This device can not have influence on the operate as normal of magnetron again; Diode is a best choice, and other devices that are similar to diode are also in the protection range of this patent, in order to guarantee the magnetron operate as normal; The different connected modes that diode is placed on diverse location or the circuit of circuit just need additional different device, but what stop mainly that reverse impulse forms the loop is diode.

Claims

1. microwave oven; Comprise high-tension transformer, magnetron, high-voltage capacitance and high-voltage diode; High-tension transformer comprises skeleton, elementary winding, secondary winding and Filament Winding again; Secondary winding, high-voltage diode and high-voltage capacitance constitute the half-wave voltage-multiplying circuit; The negative electrode and the Filament Winding of magnetron connect to form heating circuit, it is characterized in that: said anode of magnetron through the high-voltage capacitance of secondary winding in the circuit of heating circuit to being provided with the cropper of handling the magnetron pulse ripple between the heating circuit.

2. according to the said microwave oven of claim 1; It is characterized in that: said cropper is located at and connects between half-wave voltage-multiplying circuit and the heating circuit; It is the combination of diode or diode and load parallel connection, and the input of cropper is connected with heating circuit, and output is connected with the half-wave voltage-multiplying circuit.

3. according to the said microwave oven of claim 1, it is characterized in that: said cropper is located at high-voltage capacitance between the heating circuit, and it is that diode and silicon controlled reverse parallel connection are formed, and the silicon controlled input is connected with high-voltage capacitance.

4. according to the said microwave oven of claim 1, it is characterized in that: be provided with phase shifter in the said heating circuit.

5. according to the said microwave oven of claim 1, it is characterized in that: be provided with the voltage on-off controller in the said half-wave voltage-multiplying circuit.

6. microwave oven; Comprise high-tension transformer, magnetron, high-voltage capacitance and high-voltage diode; High-tension transformer comprises skeleton, elementary winding, secondary winding again; Secondary winding, high-voltage diode and high-voltage capacitance constitute the half-wave voltage-multiplying circuit, it is characterized in that: said anode of magnetron through the high-voltage capacitance of secondary winding in the circuit of magnetron cathode to being provided with the cropper of handling the magnetron pulse ripple between the heating circuit;

Also comprise a transformer, transformer comprises input winding and output winding, and the output winding is electrically connected with magnetron cathode.