CN202565499U

CN202565499U - Microwave oven

Info

Publication number: CN202565499U
Application number: CN2012202334357U
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-24
Filing date: 2012-05-15
Publication date: 2012-11-28
Anticipated expiration: 2022-05-15
Also published as: CN202565502U; CN202564031U; CN202738163U; CN202634742U; CN202634743U; CN202565503U; CN202565498U; CN103200722A; CN202587451U

Abstract

The utility model relates to a microwave oven which comprises a magnetron and a high-voltage transformer, 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 negative pole of the magnetron to form a heating loop, and the positive pole of the magnetron is in ground connection. The primary winding, a first high-voltage diode and a high-voltage capacitor are connected in series to constitute a first half-wave voltage doubling circuit, and the second secondary winding, a second high-voltage diode and a second high-voltage capacitor are connected in series to constitute a second half-wave voltage doubling circuit. The microwave oven is reasonable in structure, and enables positive half-wave output power and negative half-wave output power of the high-voltage transformer to be roughly equal to each other by utilizing the two out-of-phase half-wave voltage doubling circuits which are composed of the two secondary windings of the high-voltage transformer, thereby reducing temperature rise of the high-voltage transformer and improving efficiency. Besides, the microwave oven not only comprises a power frequency microwave oven but also comprises a variable frequency microwave oven.

Description

A kind of microwave oven

Technical field

The utility model 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 purpose of the utility model 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;

First secondary winding, first high-voltage diode and the series connection of first high-voltage capacitance constitute the first half-wave voltage-multiplying circuit; First high-voltage capacitance, one end connects the reversed-phase output of first secondary winding; The first high-voltage capacitance other end 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, second high-voltage diode and the series connection of second high-voltage capacitance constitute the second half-wave voltage-multiplying circuit; Second high-voltage capacitance, one end connects second subprime winding in-phase output end; The second high-voltage capacitance other 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.

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.

Be respectively equipped with the device of antisurge between the earth terminal of the said first half-wave voltage-multiplying circuit and the second half-wave voltage-multiplying circuit and the ground.

The utility model is reasonable in design; Can utilize the half-wave voltage-multiplying circuit of two out-phase of two secondary winding compositions of high-tension transformer 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, and the said microwave oven of this patent had both comprised that the power frequency microwave oven also comprised the variable frequency microwave stove.

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 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 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 in-phase output ends and first high-voltage fuse 14, first high-voltage diode 16 and first high-voltage capacitance 15 constitute the first half-wave voltage-multiplying circuit; Wherein first high-voltage diode, 16 outputs are connected with magnetron 7 anodes, first high-voltage capacitance, 15 1 ends; The other end of first high-voltage capacitance 15 is connected with the reversed-phase output of 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 diode 11 and second high-voltage capacitance 10 constitute the second half-wave voltage-multiplying circuit; Second high-voltage diode, 11 outputs are connected with an end of magnetron 7 anodes, second high-voltage capacitance 10; The other end of second high-voltage capacitance 10 is connected with the in-phase output end of second subprime winding 5; 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 two half-wave circuits; 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 and the difference of embodiment 3 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.

Embodiment 5, and in conjunction with Fig. 5, embodiment 5 is to cancel first high-voltage fuse 14 and second high-voltage fuse 9 with the difference of embodiment 1, at the output of first high-voltage diode 16 and second high-voltage diode 11 to increase the 3rd high-voltage fuse 21 between the ground.

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 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.

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