CN1972539A - Timing power-off apparatus of microwave oven - Google Patents
Timing power-off apparatus of microwave oven Download PDFInfo
- Publication number
- CN1972539A CN1972539A CN 200510016325 CN200510016325A CN1972539A CN 1972539 A CN1972539 A CN 1972539A CN 200510016325 CN200510016325 CN 200510016325 CN 200510016325 A CN200510016325 A CN 200510016325A CN 1972539 A CN1972539 A CN 1972539A
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- Prior art keywords
- timer
- microwave oven
- power
- chip
- thyristor
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Abstract
This invention relates to microwave timer break device, which comprises timer in power control circuit; crystal tube in power switch connected to the control end. The timer process comprises the following steps: after close, closing furnace gate and the chip control timer starts after certain time to send out interval power signal to switch power; microwave furnace works and opening gate for timer as zero; closing furnace gate and connecting power and the chip controller timer starts; pressing operation keys to stop timer; chip controls relay magnetic tube operation to fulfill food cooking.
Description
Technical field
The present invention relates to microwave oven, particularly relate to the power switch device of microwave oven.
Background technology
Microwave oven is the household electrical appliance cooker that utilizes high-frequency microwave that food is heated, and the frictional heat that produces by food molecule high vibration under the radiation effects of high-frequency microwave heats and cooking food.During the cooking in microwave oven operation, microwave penetration food, can inside and outside heating simultaneously, it is fast and use plurality of advantages easily to have an efficient height, speed.Therefore, microwave oven progressively becomes widely used domestic electric appliance.
The outward appearance of microwave oven is rectangular shape, and there is fire door in the housing front of cuboid, fire door one side setting operation key.Form furnace chamber in the housing, the top and side of furnace chamber is provided with the internal structure of microwave oven, mainly contains magnetron, waveguide, control circuit device and blender etc.
Magnetron is the heart of microwave oven, is a kind of vacuum device, is used to produce the continuous microwave of heat food.The microwave that magnetron produces is carried and is radiated on the food in the furnace chamber by the waveguide of high-conductive metal material.Blender is made with the metal such as the magnadure plate that conduct electricity very well, intensity is high, just as screw, drive by small machine, in rotatablely moving, constantly change reflection angle to microwave radiation, thereby improve the distribution of microwave field in the furnace chamber, the food in the furnace chamber is heated evenly.The microwave oven that has is not provided with blender, and the rotating disk of support food is set in furnace chamber bottom, and the food that rotatablely moves with rotating disk also can be subjected to the even heating of microwave radiation.
Fire door is the passage of placing food and take out food in the furnace chamber in furnace chamber, has enough mechanical strengths, and that long-term switch uses is still indeformable, non-cracking and microwave leakage do not occur.The observation window of fiberglass is equipped with in fire door central authorities, accompanies intensive pore metallic shield net in the fiberglass, can see cooking status in the stove during use, can make the unlikely leakage of microwave again.
Control circuit device is arranged in the housing; comprise control circuit and respective electric parts thereof; mainly contain power controller, high-tension transformer, high-voltage capacitor, overheat protector, timer, fire door interlocking switch, rotary tray motor (or agitator motor), fan electromotor etc., its function guarantee and control the normal operation of whole microwave oven.
Computer control type microwave oven has diversified controlled function, can finish multiple work according to previously selected program.Computer control type microwave oven is realized controlled function by chip, and its controlled function mainly contains: the cooking is regularly selected, cooking power selection, and microwave oven regularly starts, temperature control, two kinds of cooking operation program compatibilities, and audible alarm etc.
Fig. 1 is general microwave oven structure schematic diagram.During the applied microwave stove, energized is opened the fire door 6 in micro-wave oven casing 1 front, food is put in the furnace chamber 8, closed upper furnace door 6, push key 9, control circuit board and chip and the operation of each electric component, the microwave that magnetron 2 produces award the food homogeneous radiation heating in the furnace chamber 8.After finishing cooking heating according to the predefined time, open fire door 6 again and take out foods.
Fig. 2 is a kind of microwave oven supply power control section circuit diagram of prior art.As shown in Figure 2, external power supply 10 is the alternating current of 220V, and power supply 10 is connected by interior magnetron 2 grades of mains switch 11 and microwave oven.Mains switch 11 includes stove door switch 12.Close fire door 6, stove door switch 12 makes power supply 10 conductings; Open fire door 6, stove door switch 12 cuts off power supply 10.During microwave oven work, fire door 6 is closed, and power supply 10 is connected, simultaneously, 13 operations of operation keys 9 control chips, relay 14 makes magnetron 2 runnings, and finishes the cooking heating of food according to the predefined time.Finish the work at microwave oven, after the food of taking-up cooking heating, close fire door 6 again.
But behind the microwave oven end-of-job of above-mentioned prior art, fire door enters closed condition, although microwave oven does not carry out operation, and power supply still is in on-state.Like this, not only electricity consumption is wasted, and influences the life-span of electric component and even complete machine.
Summary of the invention
The present invention be directed to the problem that power supply behind the existing end-of-job of microwave oven of prior art still is in on-state proposes, by timer being set on the power control circuit and thyristor being set on mains switch, make microwave oven at end-of-job after after a while, the signal cut power supply that thyristor is sent according to chip.
Timing power-off apparatus of microwave oven involved in the present invention is included in the timer that is provided with on the power control circuit, the thyristor that is provided with on mains switch, timer is connected with the port of chip respectively with thyristor.The control of thyristor extremely directly connects the chip control port.
The working procedure of timing power-off apparatus of microwave oven involved in the present invention is: the microwave oven end-of-job, and fire door is closed, and the chip controls timer picks up counting, and after after a while, chip sends the interruption power supply signal to thyristor, and thyristor is cut off the electricity supply.
When microwave oven need carry out work again: open fire door, the zero clearing of chip controls timer; Fire door is closed, power connection, and the chip controls timer picks up counting again; Operation keys is pressed, and timer stops timing, and the chip controls relay makes the magnetron running, and finishes the cooking heating of food according to the predefined time.Finish the work at microwave oven, after taking out the food of cooking heating and closing fire door, the chip controls timer picks up counting again, and after after a while, chip sends the interruption power supply signal to thyristor, and thyristor is cut off the electricity supply
Like this, microwave oven is not when working, and dump not only reduces power consumption, but also increases the life-span of electric component and even complete machine.
Description of drawings
Fig. 1 is general microwave oven structure schematic diagram.
Fig. 2 is the microwave oven supply power control section circuit diagram of prior art.
Fig. 3 is a microwave oven supply power control section circuit diagram of the present invention.
Main mark explanation among the figure:
1, housing 2, magnetron
3, waveguide 4, blender
5, reflecting plate 6, fire door
7, observation window 8, furnace chamber
9, operation keys 10, power supply
11, mains switch 12, stove door switch
13, chip 14, relay
15, timer 16, thyristor
Embodiment
Timing power-off apparatus of microwave oven involved in the present invention is included in the timer 15 that is provided with on the power control circuit, the thyristor 16 that is provided with on mains switch 11, timer 15 is connected with the control port Vs of chip 13, and the control of thyristor 16 extremely directly connects the control port VD of chip 13.
The working procedure of timing power-off apparatus of microwave oven involved in the present invention is: the microwave oven end-of-job, fire door is closed, and chip controls timer 15 picks up counting, after after a while, chip 13 sends the interruption power supply signal to thyristor 16, and thyristor 16 cuts off the electricity supply 10.
When microwave oven need carry out work again: open fire door, 15 zero clearings of chip 13 control timers; Fire door is closed, and power supply 10 is connected, and chip 13 control timers 15 pick up counting again; Operation keys is pressed, and timer 15 stops timing, and chip 13 control relays 14 make magnetron 2 runnings, and finishes the cooking heating of food according to the predefined time.Finish the work at microwave oven, after taking out the food of cooking heating and closing fire door, chip 13 control timers 15 pick up counting again, and after after a while, chip 13 sends the interruption power supply signal to thyristor 16, and thyristor 16 cuts off the electricity supply 10.
Claims (3)
1, a kind of timing power-off apparatus of microwave oven, comprise the power supply, chip, the mains switch that are provided with on the power control circuit, it is characterized in that, also be included in the timer that is provided with on the power control circuit, the thyristor that is provided with on mains switch, timer is connected with the control port of chip respectively with thyristor.
2, timing power-off apparatus of microwave oven according to claim 1 is characterized in that, the control of thyristor extremely directly connects the control port (VD) of chip.
3, a kind of working procedure of timing power-off apparatus of microwave oven according to claim 1 is characterized in that: the microwave oven end-of-job, and fire door is closed, the chip controls timer picks up counting, after after a while, chip sends the interruption power supply signal to thyristor, and thyristor is cut off the electricity supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016325 CN1972539A (en) | 2005-11-23 | 2005-11-23 | Timing power-off apparatus of microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016325 CN1972539A (en) | 2005-11-23 | 2005-11-23 | Timing power-off apparatus of microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1972539A true CN1972539A (en) | 2007-05-30 |
Family
ID=38113060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510016325 Pending CN1972539A (en) | 2005-11-23 | 2005-11-23 | Timing power-off apparatus of microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1972539A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034738A (en) * | 2014-06-24 | 2014-09-10 | 黑龙江工程学院 | Laboratory microwave deicing instrument |
-
2005
- 2005-11-23 CN CN 200510016325 patent/CN1972539A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034738A (en) * | 2014-06-24 | 2014-09-10 | 黑龙江工程学院 | Laboratory microwave deicing instrument |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |