CN102638915A

CN102638915A - Microwave oven

Info

Publication number: CN102638915A
Application number: CN2012101210050A
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-24
Filing date: 2012-04-24
Publication date: 2012-08-15

Abstract

The invention relates to a microwave oven. The microwave oven comprises a magnetron and a high-voltage transformer, wherein the high-voltage transformer comprises a framework, a filament winding, a primary winding, a first secondary winding and a second secondary winding; the filament winding is connected with the cathode of the magnetron to form a heating loop; the anode of the magnetron is earthed; the normal phase output port of the first secondary winding is connected with a first high-voltage capacitor and a first high-voltage diode in series to form a first half-wave voltage doubling circuit; and the inverted output port of the second secondary winding is connected with a second high-voltage capacitor and a second high-voltage diode in series to form a second half-wave voltage doubling circuit. The microwave oven is reasonable in design and can make the most of the two secondary windings of the high-voltage transformer to form two heterogeneous half-wave voltage doubling circuits, so that the positive and negative half-wave output powers of the high-voltage transformer are roughly equal, thus reducing the temperature rise of the high-voltage transformer and improving the efficiency.

Description

A kind of microwave oven

Technical field

The present invention relates to a kind of microwave oven.

Background technology

Existing microwave oven generally comprises high-tension transformer, high-voltage capacitance, high-voltage diode and magnetron; High-tension transformer comprises elementary winding, secondary winding, Filament Winding and transformer framework four parts again; Voltage about the secondary output 2000VAC of high-tension transformer; Secondary winding, high-voltage capacitance and high-voltage diode are formed the half-wave voltage-multiplying circuit and are come the work of driven magnetic keyholed back plate, because high-tension transformer has half-wave to charge to electric capacity in the course of the work, have half-wave to carry out voltage and superpose the driven magnetic keyholed back plate; Therefore the power of high-tension transformer is unequal in one-period, causes the high-tension transformer serious inefficiency of generating heat.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of new power output microwave oven efficiently.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of microwave oven comprises magnetron and high-tension transformer, and high-tension transformer comprises skeleton, Filament Winding, elementary winding, first secondary winding and second subprime winding again, and Filament Winding and magnetron cathode connect to form heating circuit, anode of magnetron ground connection;

The first secondary winding positive output end is connected with first high-voltage capacitance, first high-voltage diode and is constituted the first half-wave voltage-multiplying circuit; The first secondary winding reversed-phase output ground connection; The first high-voltage diode output head grounding; The first half-wave voltage-multiplying circuit is connected with heating circuit through the 3rd high-voltage diode, and the 3rd high-voltage diode output is connected with the first high-voltage diode input;

Second subprime winding reversed-phase output is connected with second high-voltage capacitance, second high-voltage diode and is constituted the second half-wave voltage-multiplying circuit; Second subprime winding positive output end ground connection; The second high-voltage diode output head grounding; The second half-wave voltage-multiplying circuit is connected with heating circuit through the 4th high-voltage diode, and the 4th high-voltage diode output is connected with the second high-voltage diode input.

Technique scheme can be done further perfect as follows.

Has a winding and skeleton open circuit in said first secondary winding and the second subprime winding at least.

Have at least a winding to connect in said Filament Winding, elementary winding, first secondary winding and the second subprime winding with the Temperature protection device.

The earth terminal of the said first half-wave voltage-multiplying circuit and the second half-wave voltage-multiplying circuit is provided with the device of antisurge.

The present invention is reasonable in design, can utilize two secondary winding of high-tension transformer to form the half-wave voltage-multiplying circuit of two out-phase as far as possible, make high-tension transformer positive and negative half-wave power output about equally, thereby reduce the temperature rise of high-tension transformer, raise the efficiency.

Description of drawings

Fig. 1 is the micro-wave oven high-voltage part schematic diagram of embodiment 1.

Fig. 2 is the micro-wave oven high-voltage part schematic diagram of embodiment 2.

Fig. 3 is the micro-wave oven high-voltage part schematic diagram of embodiment 3.

Fig. 4 is the micro-wave oven high-voltage part schematic diagram of embodiment 4.

Fig. 5 is the micro-wave oven high-voltage part schematic diagram of embodiment 5.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.

Embodiment 1, in conjunction with Fig. 1, and a kind of microwave oven; Comprise high-tension transformer 1 and magnetron 7; High-tension transformer 1 comprises skeleton 2, elementary winding 3, first secondary winding 4, second subprime winding 5 and Filament Winding 6 again, and Filament Winding 6 is formed heating circuit, anode of magnetron ground connection with magnetron 7 negative electrodes.First secondary winding, 4 positive output ends and first high-voltage fuse 14, first high-voltage capacitance 15 and first high-voltage diode 16 constitute the first half-wave voltage-multiplying circuit; Wherein first high-voltage diode, 16 outputs are connected with the reversed-phase output of magnetron 7 anodes, first secondary winding 4; The first half-wave voltage-multiplying circuit is connected with heating circuit through the 3rd high-voltage diode 17, and wherein the 3rd high-voltage diode 17 outputs are connected with first high-voltage diode, 16 inputs.Second subprime winding 5 inverse output terminals and second high-voltage fuse 9, second high-voltage capacitance 10 and second high-voltage diode 11 constitute the second half-wave voltage-multiplying circuit; Second high-voltage diode, 11 outputs are connected with magnetron 7 anodes, second subprime winding 5 positive output ends; The second half-wave voltage-multiplying circuit is connected with heating circuit through the 4th high-voltage diode 12, and wherein the 4th high-voltage diode 12 outputs are connected with second high-voltage diode, 11 inputs.In each half-wave; One of them secondary winding is to the high-voltage capacitor charging of this voltage-multiplying circuit; Another one secondary winding just stack gives magnetron 7 power supplies; So all export same power at each half-wave mesohigh transformer, the function of the surge when the 4th high-voltage diode 12 and the 3rd high-voltage diode 17 block magnetron 7 and start except stoping two secondary winding are interconnected, also having.

Embodiment 2; In conjunction with Fig. 2; Embodiment 2 is in the first half-wave multiplication of voltage electricity at first secondary winding, 4 places, between first high-voltage diode, 16 outputs and magnetron 7 anodes, to increase by one the 5th high-voltage diode 13, the five high-voltage diodes 13 output head groundings with the difference of embodiment 1; The effect of the 5th high-voltage diode 13 is to strengthen the ability of anti-surge, and the earth terminal that same situation also can appear in the second half-wave voltage-multiplying circuit increases by one the 6th high-voltage diode 8.

Embodiment 3, and in conjunction with Fig. 3, embodiment 3 is that with the difference of embodiment 1 the 4th high-voltage diode 12 is composed in series by high-voltage diode 18 and 19, and same situation can appear on other the high-voltage diode or high-voltage capacitance, no longer repeats at this.

Embodiment 4, and in conjunction with Fig. 4, embodiment 4 is to cancel the 5th high-voltage diode 13, the first high-voltage diodes 16 output head groundings with the difference of embodiment 2, and secondary winding 4 reversed-phase outputs are connected with skeleton 2, skeleton 2 ground connection.

Embodiment 5, and in conjunction with Fig. 5, embodiment 5 and the difference of embodiment 4 temperature insurance device 20 that is in elementary winding 3, to connect replaces first high-voltage fuse 14 and second high-voltage fuse 9, and elementary winding 3 is the windings with three power inputs.

Claims

1. microwave oven; Comprise magnetron and high-tension transformer; High-tension transformer comprises skeleton, Filament Winding and elementary winding again; Filament Winding and magnetron cathode connect to form heating circuit, and anode of magnetron ground connection is characterized in that: said high-tension transformer also comprises first secondary winding and second subprime winding;

2. according to the said microwave oven of claim 1, it is characterized in that: have a winding and skeleton open circuit in said first secondary winding and the second subprime winding at least.

3. according to the said microwave oven of claim 1, it is characterized in that: have at least a winding to connect in said Filament Winding, elementary winding, first secondary winding and the second subprime winding with the Temperature protection device.

4. according to the said microwave oven of claim 1, it is characterized in that: the earth terminal of the said first half-wave voltage-multiplying circuit and the second half-wave voltage-multiplying circuit is provided with the device of antisurge.