CN202738163U

CN202738163U - Microwave oven

Info

Publication number: CN202738163U
Application number: CN 201220440229
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-24
Filing date: 2012-08-31
Publication date: 2013-02-13
Anticipated expiration: 2022-08-31
Also published as: CN202565503U; CN202587451U; CN202634742U; CN202565498U; CN202564031U; CN202634743U; CN202565502U; CN202565499U; CN103200722A

Abstract

The utility model relates to a microwave oven. The microwave oven comprises a magnetron and a high-voltage transformer, wherein the high-voltage transformer further comprises a framework, a filament winding, and a primary winding; the filament winding is connected with the cathode of the magnetron to form a heating loop, and the anode of the magnetron is connected to the ground; and a first half-wave dual voltage circuit and a second half-wave dual voltage circuit which work in a noninveting manner are connected between the anode of the magnetron and the heating loop, wherein the input end of a high-voltage diode in each half-wave dual voltage circuit is connected with the heating loop, and the output end of the high-voltage diode is connected with the anode of the magnetron. The microwave oven is reasonably designed, wherein two secondary windings are utilized to compose two noninverting-working half-wave dual voltage circuits, so that the output power of a high-voltage transformer is decreased by about 50% on each winding, thereby reducing temperature rise of the high-voltage transformer, and improving the efficiency; and the microwave oven in the utility model comprises both power frequency and variable frequency microwave ovens.

Description

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 again armature winding, secondary winding, Filament Winding and transformer framework four parts, and the secondary winding that only has an output high pressure, voltage about the secondary output 2000VAC of high-tension transformer, secondary winding, high-voltage capacitance and high-voltage diode form the half-wave voltage-multiplying circuit and drive magnetron work, high-tension transformer has half-wave in the course of the work to capacitor charging, there is half-wave to carry out voltage and superposes to drive magnetron, because power stage all is by a high voltage secondary winding output, therefore can cause the high-tension transformer heating serious, the problems such as efficient is low.

Summary of the invention

Therefore, the purpose of this utility model is to provide a kind of new power output efficient microwave oven.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of microwave oven, comprise magnetron and high-tension transformer, high-tension transformer comprises again skeleton, Filament Winding and armature winding, Filament Winding and magnetron cathode connect to form heating circuit, anode of magnetron ground connection, be connected with two push-push operation half-wave voltage-multiplying circuits between described anode of magnetron and the heating circuit, be respectively the first half-wave voltage-multiplying circuit and the second half-wave voltage-multiplying circuit, high-voltage diode input in each half-wave voltage-multiplying circuit is connected with heating circuit, and the high-voltage diode output is connected with anode of magnetron.

Technique scheme can be done following further perfect.

Also comprise high-voltage capacitance and high-voltage insurance assembly in described the first half-wave voltage-multiplying circuit, also comprise high-voltage capacitance and high-voltage insurance assembly in described the second half-wave voltage-multiplying circuit.

Be provided with the cropper of antisurge between described the first half-wave voltage-multiplying circuit and the anode of magnetron.

Be provided with the cropper of antisurge between described the second half-wave voltage-multiplying circuit and the anode of magnetron.

Be provided with the cropper of antisurge between described the first half-wave voltage-multiplying circuit and the heating circuit.

Be provided with the cropper of antisurge between described the second half-wave voltage-multiplying circuit and the heating circuit.

The utility model is reasonable in design, can utilize two secondary winding to form two push-push operation half-wave voltage-multiplying circuits as far as possible, so that the power output of high-tension transformer descends about 50% at each winding, 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 frequency-conversion microwave oven.

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.

Fig. 6 is the micro-wave oven high-voltage part schematic diagram of embodiment 6.

Fig. 7 is the micro-wave oven high-voltage part schematic diagram of embodiment 7.

Fig. 8 is the micro-wave oven high-voltage part schematic diagram of embodiment 8.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

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 again skeleton 2, armature winding 3, the first secondary winding 4, second subprime winding 5 and Filament Winding 6, and Filament Winding 6 forms heating circuit, anode of magnetron ground connection with magnetron 7 negative electrodes.The first secondary winding 4 in-phase output ends are sequentially connected with the end of oppisite phase of the first high-voltage fuse 14, the first high-voltage capacitance 15, the first high-voltage diode 16, the first secondary winding 4 and are consisted of the first half-wave voltage-multiplying circuit, the wherein output of the first high-voltage diode 16 and magnetron 7 anodic bondings in the first half-wave voltage-multiplying circuit, the first high-voltage diode 16 inputs are connected with heating circuit; The end of oppisite phase of second subprime winding 5 in-phase output ends and the second high-voltage fuse 9, the second high-voltage capacitance 10, the second high-voltage diode 11, second subprime winding 5 is sequentially connected and is consisted of the second half-wave voltage-multiplying circuit, the wherein output of the second high-voltage diode 11 and magnetron 7 anodic bondings in the second half-wave voltage-multiplying circuit, the input of the second high-voltage diode 11 is connected with heating circuit.In two half-wave circuits, simultaneously to separately high-voltage capacitor charging or stack to the magnetron power supply, so that the power output of each secondary winding drops to is original 50%, so that loss decline efficient rises.

Embodiment 2, and in conjunction with Fig. 2, embodiment 2 is to cancel the shared high-voltage diode 20 of 11, two half-wave voltage-multiplying circuits of high-voltage diode with the difference of embodiment 1.One end of the second high-voltage capacitance 10 directly is connected on the input of high-voltage diode 20.

Embodiment 3, and in conjunction with Fig. 3, embodiment 3 is to cancel 10, two half-wave voltage-multiplying circuits of high-voltage capacitance common high voltage electric capacity 21 and high-voltage diode 20 with the difference of embodiment 2.

Embodiment 4, and in conjunction with Fig. 4, embodiment 4 and the difference of embodiment 3 are that the first secondary winding 4 is connected by being connected with skeleton 2 to come indirect earthed with the second subprime winding.

Embodiment 5, and in conjunction with Fig. 5, embodiment 5 is to cancel high-voltage fuse 14 with the difference of embodiment 4, reaches the protection purpose by common high voltage fuse 22.

Embodiment 6, and in conjunction with Fig. 6, the difference of embodiment 6 and embodiment 5 is the high-voltage capacitance 21 that shares is moved on between the end of oppisite phase and anode of magnetron of each secondary winding.

Embodiment 7, and in conjunction with Fig. 7, embodiment 7 is that with the difference of embodiment 5 high-voltage diode that shares is composed in series by high-voltage diode 17 and high-voltage diode 18, and same situation also can appear at high-tension electricity perhaps on other device.

Embodiment 8, and in conjunction with Fig. 8, the difference of embodiment 8 and embodiment 5 is to increase the surge cropper 19 that shares between each half-wave voltage-multiplying circuit and anode of magnetron.

Claims

1. microwave oven, comprise magnetron and high-tension transformer, high-tension transformer comprises again skeleton, Filament Winding and armature winding, Filament Winding and magnetron cathode connect to form heating circuit, anode of magnetron ground connection, it is characterized in that: be connected with two push-push operation half-wave voltage-multiplying circuits between described anode of magnetron and the heating circuit, be respectively the first half-wave voltage-multiplying circuit and the second half-wave voltage-multiplying circuit, high-voltage diode input in each half-wave voltage-multiplying circuit is connected with heating circuit, and the high-voltage diode output is connected with anode of magnetron.

2. described microwave oven according to claim 1 is characterized in that: also comprise high-voltage capacitance and high-voltage insurance assembly in described the first half-wave voltage-multiplying circuit, also comprise high-voltage capacitance and high-voltage insurance assembly in described the second half-wave voltage-multiplying circuit.

3. described microwave oven according to claim 1 and 2 is characterized in that: the cropper that is provided with antisurge between described the first half-wave voltage-multiplying circuit and the anode of magnetron.

4. described microwave oven according to claim 1 and 2 is characterized in that: the cropper that is provided with antisurge between described the second half-wave voltage-multiplying circuit and the anode of magnetron.

5. described microwave oven according to claim 1 and 2 is characterized in that: the cropper that is provided with antisurge between described the first half-wave voltage-multiplying circuit and the heating circuit.

6. described microwave oven according to claim 1 and 2 is characterized in that: the cropper that is provided with antisurge between described the second half-wave voltage-multiplying circuit and the heating circuit.