CN201964481U

CN201964481U - Microwave furnace

Info

Publication number: CN201964481U
Application number: CN2011200520987U
Authority: CN
Inventors: 梁伟国
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-26
Filing date: 2011-02-26
Publication date: 2011-09-07
Anticipated expiration: 2021-02-26

Abstract

The utility model relates to a microwave furnace, comprising a high-voltage transformer, a full-wave rectifier and a magnetron, wherein the negative electrode of the magnetron is electrically connected with a filament winding of the high-voltage transformer; the output end of a secondary winding is electrically connected with the input end of the full-wave rectifier; the positive electrode of the magnetron is opened with the grounding end of the microwave furnace; and the positive electrode of the magnetron is electrically connected with the input end of the positive electrode of the full-wave rectifier by a connecting part. In the microwave furnace, the design is reasonable, and the condition that the working of the high-voltage transformer of the microwave furnace can not cause influence on a user after the grounding end of the microwave furnace is disconnected can be ensured, so that the safety of the microwave furnace is ensured.

Description

A kind of micro-wave oven

Technical field

The utility model relates to a kind of micro-wave oven.

Background technology

About secondary general the output 2000VAC of existing a kind of high voltage transformer of microwave oven; and secondary windings one end is by contacting ground connection with transformer framework; therefore have a half-wave voltage-multiplying circuit in the secondary back of micro-wave oven; high-tension transformer charges to the electric capacity in the half-wave voltage-multiplying circuit earlier in the half period of a sine wave; output when utilizing other half reversal periods of high-tension transformer then; the voltage that stack had originally charged about electric 4000VAC of electric capacity composition makes its work to magnetron; for the high temperature that prevents high-tension transformer causes security incidents such as winding is on fire; generally between high-tension transformer secondary windings and high-voltage capacitance the series connection high-voltage fuse component; in when, image height taking place pressing diode breakdown etc. unusual when; the electric current of secondary windings surpasses the current limit of high-voltage fuse, and fuse will burn to play a protective role.Also has a kind of high voltage transformer of microwave oven, its secondary windings is directly exported enough voltage and is driven magnetron, connect a high pressure full-wave rectifier behind this secondary windings, the cathode output end of full-wave rectifier is connected with the ground of micro-wave oven, and the anode of magnetron also is to be electrically connected with the positive pole of full-wave rectifier by the ground of micro-wave oven is next, because the use of microwave ovens environment has uncertainty, be difficult to guarantee that the ground wire of micro-wave oven is reliable, after the ground wire of micro-wave oven disconnected, the work of the high-tension transformer of micro-wave oven will produce very big danger to the people.

Summary of the invention

Therefore, the purpose of this utility model is to provide a kind of ground wire disconnection work of the high-tension transformer of micro-wave oven afterwards of micro-wave oven can not produce dangerous micro-wave oven to the people.

Above-mentioned purpose adopts following technical proposals to realize.

A kind of micro-wave oven, comprise high-tension transformer, full-wave rectifier and magnetron, high-tension transformer comprises elementary winding, secondary windings, Filament Winding again, the rarest two power inputs of elementary winding, Filament Winding is connected with the cathodic electricity of magnetron, the output of secondary windings is electrically connected with the input of full-wave rectifier, the anode of magnetron and the ground of micro-wave oven open circuit, and the anode of magnetron is electrically connected with the cathode output end of full-wave rectifier.

Technique scheme can be done following further perfect.

Have at least a windings in series that temperature protective device is arranged in described elementary winding and the secondary windings.

Have at least a winding to be provided with current sensing means in described elementary winding, secondary windings and the Filament Winding.

Have at least a winding to be provided with current protective device in described elementary winding and the secondary windings.

Described high-tension transformer inside or surface are fixed with the temperature protection checkout gear.

The utility model is reasonable in design, can guarantee that the work that disconnects the back high voltage transformer of microwave oven on the ground of micro-wave oven can not cause influence to the people, has guaranteed the safety of micro-wave oven.

Description of drawings

Fig. 1 is the electric diagram of embodiment 1;

Fig. 2 is the electric diagram of embodiment 2;

Fig. 3 is the electric diagram of embodiment 3;

Fig. 4 is the electric diagram of embodiment 4;

Fig. 5 is the electric diagram of embodiment 5;

Fig. 6 is the electric diagram of embodiment 6.

The specific embodiment

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

Embodiment 1, in conjunction with Fig. 1, a kind of micro-wave oven, comprise high-tension transformer 1, full-wave rectifier 8 and magnetron 9, high-tension transformer 1 comprises elementary winding 2 again, secondary windings 3, Filament Winding 4, elementary winding has input 5,6,7, Filament Winding 4 is connected with the cathodic electricity of magnetron 9, secondary windings 3 outputs and full-wave rectifier 8 inputs are electrically connected, the ground open circuit of magnetron 9 anodes and micro-wave oven, the anode of magnetron 9 is electrically connected the input 5 of elementary winding by attaching parts 10 with the cathode output end of full-wave rectifier 8,6 and 7 are used to select the different numbers of turn to adapt to different voltage.

Embodiment 2, and in conjunction with Fig. 2, embodiment 2 is that with the difference of embodiment 1 elementary winding 2 has only input 5 and 7.

Embodiment 3, and in conjunction with Fig. 3, embodiment 3 is to be in series with temperature protective device 11 with the difference of embodiment 1 in secondary windings 3, and too high when the secondary windings temperature, temperature protective device can cut off microwave oven supply power.

Embodiment 4, and in conjunction with Fig. 4, embodiment 4 is to carry current sensing means 12 with the difference of embodiment 1 in secondary windings 3, and too high when the secondary windings electric current, current sensing means can cut off microwave oven supply power.

Embodiment 5, and in conjunction with Fig. 5, embodiment 5 is series current protective device 13 in secondary windings 3 with the difference of embodiment 1, and too high when the secondary windings electric current, current protective device can cut off microwave oven supply power.

Embodiment 6, and in conjunction with Fig. 6, embodiment 6 is in the inside or the outside of high-tension transformer 1 temperature protection checkout gear 14 to be installed with the difference of embodiment 1, and too high when the high-tension transformer temperature, the temperature protection checkout gear can cut off microwave oven supply power.

Attaching parts 10 in the foregoing description mainly be the anode of realizing magnetron 9 with the cathode output end of full-wave rectifier 8 between be electrically connected, so attaching parts 10 can be conductors such as lead.

The protective device of the foregoing description mainly is installed on secondary windings, also has effect same but these protective devices are installed on elementary winding, is not repeated here.

Claims

1. micro-wave oven, comprise high-tension transformer, full-wave rectifier and magnetron, high-tension transformer comprises elementary winding, secondary windings, Filament Winding again, the rarest two power inputs of elementary winding, Filament Winding is connected with the cathodic electricity of magnetron, the output of secondary windings is electrically connected with the input of full-wave rectifier, it is characterized in that: the anode of magnetron and the ground of micro-wave oven open circuit, the anode of magnetron is electrically connected with the cathode output end of full-wave rectifier.

2. according to the described micro-wave oven of claim 1, it is characterized in that: have at least a windings in series that temperature protective device is arranged in described elementary winding and the secondary windings.

3. according to the described micro-wave oven of claim 1, it is characterized in that: have at least a winding to be provided with current sensing means in described elementary winding, secondary windings and the Filament Winding.

4. according to the described micro-wave oven of claim 1, it is characterized in that: have at least a winding to be provided with current protective device in described elementary winding and the secondary windings.

5. according to the described micro-wave oven of claim 1, it is characterized in that: described high-tension transformer inside or surface are fixed with the temperature protection checkout gear.