CN101881471A - Novel safe microwave oven - Google Patents
Novel safe microwave oven Download PDFInfo
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- CN101881471A CN101881471A CN2009100687516A CN200910068751A CN101881471A CN 101881471 A CN101881471 A CN 101881471A CN 2009100687516 A CN2009100687516 A CN 2009100687516A CN 200910068751 A CN200910068751 A CN 200910068751A CN 101881471 A CN101881471 A CN 101881471A
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Abstract
The invention discloses a novel safe microwave oven. Compared with microwave ovens in the prior art, the invention discloses the novel safe microwave oven. The microwave oven can power off automatically and make an alarm when a contact of a metal piece of a relay which controls peripheral working components is molten and bonded so that the potential safety hazard of a micro-wave oven product is reduced greatly, the product use feeling of a user is improved and great production practice significance is achieved.
Description
Technical field
The present invention relates to the micro-wave oven technical field, particularly relate to a kind of novel safe microwave oven.
Background technology
Micro-wave oven is to produce microwave by electric current, and microwave irradiation surface of heating object in the cavity is come device that article are heated.As everyone knows, micro-wave oven is a kind of modernization cooking kitchen range with microwave heating of food.The microwave that it adopted is a kind of electromagnetic wave.This electromagnetic energy is not only much bigger than common radio wave, but also characteristics are arranged very much, and microwave at a touch metal just reflects, and metal has no idea to absorb or conduct it at all; Microwave can pass insulating materials such as glass, pottery, plastics, but can consumed energy; And contain the food of moisture, and microwave not only can not see through, and its energy can be absorbed on the contrary.Based on these characteristics, micro-wave oven is heat food well, has obtained utilization widely in daily life.
At present, as shown in Figure 1, micro-wave oven generally includes: comprise the body 10 of front casing 11, shell 12 and outside framework 13, form the cavity 20 of culinary art chamber, and the inner electric control chamber 30 that various electric components are installed.
Described electric component comprises: be used to generate the magnetron 31 of microwave, be used for providing to magnetron 31 high-tension transformer 32 of high pressure, and be used for blowing fan 33 that body 10 inner various electric components are cooled off.
At present, referring to Fig. 2, in micro-wave oven, peripheral workpiece such as magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5 form micro-wave oven peripheral forceful electric power circuit (in this circuit the operation level of each parts all 220V or more than), they all are to come gauge tap (being conducting or disconnection) by a relay 1 respectively, relay 1 is that a coil is wrapped on the iron core, and this relay reaches the purpose of the peripheral forceful electric power circuit of conducting by electromagnetic induction after energising.Be specially: the coil in the relay produces electromagnetic force after energising, thereby the small-sized lever that drives its inside makes two independent sheet metals of its outside stick together, thereby makes circuit turn-on, realizes giving the purpose of peripheral workpiece power supply.Among the figure, described transformer 30 is connected with microwave oven supply power 20, be used to main control chip 10 and relay 1 that operating voltage is provided, the input of relay 1 is connected with main control chip 10 by control triode 6, the output of relay 1 is connected with microwave oven supply power 20, so microwave oven supply power 20 is controlled by relay 1 with the conducting or the disconnection of each peripheral workpiece.
But, as mentioned above, because relay is by electromagnetic force and by two sheet metals of effect adhesion of lever, thereby realization turning circuit, when so if these relay access times are excessive too much or by electric current, will make contact on two sheet metals melt and be sticked together up hill and dale, can't disconnect again, finally make relay lose switch control functions to peripheral workpieces such as magnetron, barbecue tube, fan electromotor, stove lamps, micro-wave oven can't quit work, potential safety hazard takes place easily, badly influences user's product use experience.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of novel safe microwave oven, when this micro-wave oven can melt adhesion in the sheet metal contact of the relay of controlling peripheral workpiece, automatically cut off the power supply and report to the police, greatly reduce the potential safety hazard of micro-wave oven product, strengthened user's product use experience, be of great practical significance.
For this reason, the invention provides a kind of novel safe microwave oven, include at least one relay 1, the input of described relay 1 is connected with main control chip 10 by control triode 6, described main control chip 10 is circumscribed with a newly-increased relay 9, the input that should increase relay 9 newly connects main control chip 10 by a control triode 6, its output termination microwave oven supply power 20, and the output of each described relay 1 is connected with newly-increased relay 9, also be provided with comparison module 100 in the described main control chip 10, whether the input level that this comparison module 100 is used for real-time comparator relay 1 conforms to the output level of relay 1, when not conforming to, the newly-increased relay 9 that control is connected with control chip 10 disconnects and reports to the police, this micro-wave oven also includes transformer 30, this transformer 30 is connected with microwave oven supply power 20, is used to main control chip 10, relay 1 and newly-increased relay 9 provide operating voltage;
Above-mentioned relay 1 is respectively applied for the switch of each workpiece in the control micro-wave oven.
Preferably, the base stage of described control triode 6 connects main control chip 10, grounded emitter, and colelctor electrode connects described relay 1.
Preferably, the input level of described relay 1 is the level that main control chip 10 is given control triode 6, and the output level of described relay 1 is the port level of the workpiece operation of relay 1 control micro-wave oven.
Preferably, the output of described newly-increased relay 9 joins by a backfeed loop and main control chip 10, this backfeed loop includes commutation diode and filtering capacitance of voltage regulation, the anode of this commutation diode connects the output of newly-increased relay 9, its negative electrode connects a comparison module 100 in the main control chip 10 and an end of filtering capacitance of voltage regulation, the other end ground connection of described filtering capacitance of voltage regulation respectively.
By above technical scheme provided by the invention as seen, compare with the micro-wave oven of prior art, the present invention proposes a kind of novel safe microwave oven, when this micro-wave oven can melt adhesion in the sheet metal contact of the relay of controlling peripheral workpiece, automatically cut off the power supply and report to the police, greatly reduce the potential safety hazard of micro-wave oven product, strengthened user's product use experience, be of great practical significance.
Description of drawings
Fig. 1 is the exploded perspective view of common microwave stove structure;
Fig. 2 is the block diagram of the common microwave stove of prior art;
Fig. 3 is the physical circuit schematic diagram of the common microwave stove of prior art shown in Figure 2;
Fig. 4 is the block diagram of a kind of novel safe microwave oven provided by the invention.
The specific embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
Fig. 4 is the block diagram of a kind of novel safe microwave oven provided by the invention.
Referring to Fig. 4, the invention provides a kind of novel safe microwave oven, this micro-wave oven includes relay 1, magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5, wherein, described magnetron 2 is used to produce the microwave that food is heated, barbecue tube 2 is used for food is roasted, and rotary tray motor 41 and fan electromotor 42 are respectively applied for and drive rotating disk, fan rotates, and stove lamp 5 is used for being thrown light in the culinary art chamber of micro-wave oven.
In the present invention, workpieces such as described magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42 and stove lamp 5 are by relay 1 controls conducting or disconnection, and they form the peripheral forceful electric power circuit of micro-wave oven together.
In the present invention, the input of described relay 1 is connected with main control chip 10 by control triode 6.
Need to prove, the operation level of described magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42 and stove lamp 5 all is 220V or above level, and the operation level of main control chip 10 is direct current 5V, so main control chip 10 is controlled the peripheral forceful electric power circuit of micro-wave oven indirectly by relay 1.When relay 1 needed action, main control chip 10 output high level provided stable voltage can for relay 1 by the conducting of control triode 6, relay 1 action like this, thus drive corresponding peripheral workpiece action.
On the specific implementation, the base stage of described control triode 6 connects main control chip 10, grounded emitter, and colelctor electrode connects described relay 1.
In the present invention, described main control chip 10 is used for the operation of each workpiece of micro-wave oven is controlled, for example, make the operation of micro-wave oven workpiece if desired, main control chip 10 gives control triode 6 with high level, these control triode 6 conductings, thereby the input level (being control level) of the feasible relay 1 that links to each other with control triode 6 is a high level, relay 1 since energising and with microwave oven supply power 20 conductings, control coupled micro-wave oven workpiece operation, the output level of relay 1 is a high level;
Certainly, if do not need to make the operation of micro-wave oven workpiece, main control chip 10 gives control triode 6 with low level, these control triode 6 not conductings, the input level of the feasible relay 1 that links to each other with control triode 6 of meeting is a low level, and at this moment relay 1 disconnects, and coupled micro-wave oven workpiece is not communicated with microwave oven supply power 20, thereby do not move, the output level of relay 1 is a low level.
But, as previously mentioned, when this relay 1 because access times when excessive too much or by electric current, will make contact on two sheet metals melt and up hill and dale physics be sticked together, can't disconnect again, finally make relay lose to magnetron, barbecue tube, fan electromotor, the switch control functions of peripheral workpieces such as stove lamp, in this case, no matter main control chip 10 is high level or low level to what control triode 6, no matter control whether conducting of triode 6, because the sheet metal contact of this relay 1 physics all the time is sticked together, the output level of this relay 1 is the influence that high level is not subjected to its input level, the output level of this relay 1 is always high level, and coupled micro-wave oven workpiece is all the time in operation, and is uncontrolled.
When melting adhesion in the sheet metal contact of the relay of the peripheral workpiece of control, automatically cut off the power supply and report to the police, in the present invention, described main control chip 10 also is circumscribed with a newly-increased relay 9, the input that should increase relay 9 newly connects main control chip 10 by a control triode 6, its output termination microwave oven supply power 20.And the output of each described relay 1 is connected with newly-increased relay 9.Need to prove that the base stage of this control triode 6 connects main control chip 10, grounded emitter, colelctor electrode connects described newly-increased relay 9.
Need to prove, in the prior art, the output of relay 1 directly is connected with microwave oven supply power 20 and is connected each workpiece in the micro-wave oven, and in the present invention, each relay 1 is with after newly-increased relay 9 is connected, just be connected with each workpiece in the micro-wave oven with microwave oven supply power 20, so, if newly-increased relay 9 disconnects, each relay 1 is all out of touch with microwave oven supply power 20 so, thereby make peripheral workpiece outage quit work, promptly microwave oven supply power 20 can be controlled by newly-increased relay 9 with the conducting or the disconnection of each peripheral workpiece.
In described main control chip 10, also be provided with comparison module 100, whether the input level that this comparison module 100 is used for real-time comparator relay 1 conforms to the output level of relay 1, when not conforming to, the newly-increased relay 9 that control is connected with control chip 10 disconnects and reports to the police.Therefore make peripheral workpiece such as magnetron, barbecue tube, fan electromotor, stove lamp cut off the power supply.
Need to prove that the input level of above-mentioned relay 1 is the level that main control chip 10 is given control triode 6, the output level of relay 1 is the port level of the workpiece operation of relay 1 control micro-wave oven.
When physics is sticked together up hill and dale because melt the contact in relay 1 on two sheet metals, the output level of this relay 1 is always high level, when so the user wants to close this micro-wave oven, can make the input level of relay 1 by main control chip 10 is low level, at this time there is inconsistent phenomenon in the level at relay 1 two ends, thereby effect by means of above-mentioned comparison module 100 and newly-increased relay 9, still can realize that the user closes the purpose of micro-wave oven, thereby avoid the micro-wave oven product owing to stopping to take place potential safety hazard.
In the present invention, need to prove, on the specific implementation, the output of above-mentioned newly-increased relay 9 joins by a backfeed loop and main control chip 10, this backfeed loop includes commutation diode and filtering capacitance of voltage regulation, the anode of this commutation diode connects the output of newly-increased relay 9, and its negative electrode connects a comparison module 100 in the main control chip 10 and an end of filtering capacitance of voltage regulation, the other end ground connection of described filtering capacitance of voltage regulation respectively.
Referring to Fig. 4, micro-wave oven of the present invention includes transformer 30, this transformer 30 is connected with microwave oven supply power 20, be used to main control chip 10, relay 1 and newly-increased relay 9 that operating voltage is provided, in the present invention, the operating voltage of described relay 1 and newly-increased relay 9 is 12V, and the working power of main control chip 10 is 5V.
In sum, compare with the micro-wave oven of prior art, the invention provides a kind of novel safe microwave oven, when this micro-wave oven can melt adhesion in the sheet metal contact of the relay of controlling peripheral workpiece, automatically cut off the power supply and report to the police, greatly reduce the potential safety hazard of micro-wave oven product, strengthened user's product use experience, be of great practical significance.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. novel safe microwave oven, it is characterized in that, include at least one relay (1), the input of described relay (1) is connected with main control chip (10) by control triode (6), described main control chip (10) is circumscribed with a newly-increased relay (9), the input that should increase relay (9) newly connects main control chip (10) by a control triode (6), it exports termination microwave oven supply power (20), and the output of each described relay 1 is connected with newly-increased relay (9), also be provided with comparison module (100) in the described main control chip (10), whether the input level that this comparison module (100) is used for real-time comparator relay (1) conforms to the output level of relay (1), when not conforming to, the newly-increased relay (9) that control is connected with control chip (10) disconnects and reports to the police, this micro-wave oven also includes transformer (30), this transformer 30 is connected with microwave oven supply power (20), is used to main control chip (10), relay (1) and newly-increased relay (9) provide operating voltage;
Above-mentioned relay (1) is respectively applied for the switch of each workpiece in the control micro-wave oven.
2. micro-wave oven as claimed in claim 1 is characterized in that, the base stage of described control triode (6) connects main control chip (10), grounded emitter, and colelctor electrode connects described relay (1).
3. micro-wave oven as claimed in claim 1, it is characterized in that, the input level of described relay (1) is the level that main control chip (10) is given control triode (6), and the output level of described relay (1) is the port level of the workpiece operation of relay (1) control micro-wave oven.
4. as each described micro-wave oven in the claim 1 to 3, it is characterized in that, the output of described newly-increased relay (9) joins by a backfeed loop and main control chip (10), this backfeed loop includes commutation diode and filtering capacitance of voltage regulation, the anode of this commutation diode connects the output of newly-increased relay (9), its negative electrode connects a comparison module (100) in the main control chip (10) and an end of filtering capacitance of voltage regulation, the other end ground connection of described filtering capacitance of voltage regulation respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910068751 CN101881471B (en) | 2009-05-05 | 2009-05-05 | Novel safe microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910068751 CN101881471B (en) | 2009-05-05 | 2009-05-05 | Novel safe microwave oven |
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| Publication Number | Publication Date |
|---|---|
| CN101881471A true CN101881471A (en) | 2010-11-10 |
| CN101881471B CN101881471B (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910068751 Expired - Fee Related CN101881471B (en) | 2009-05-05 | 2009-05-05 | Novel safe microwave oven |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3569656A (en) * | 1969-07-24 | 1971-03-09 | Bowmar Tic Inc | Automatic cooking cycle control system for microwave ovens |
| CN2133081Y (en) * | 1992-06-27 | 1993-05-12 | 国营燕南内燃机配件厂 | Multifunction protector for three-phase motor |
| KR100246415B1 (en) * | 1997-11-20 | 2000-04-01 | 구자홍 | Apparatus of controlling illumination for microwave oven |
| KR20060131412A (en) * | 2005-06-16 | 2006-12-20 | 엘지전자 주식회사 | Safety circuit of microwave oven |
| CN201177297Y (en) * | 2007-04-28 | 2009-01-07 | 广东格兰仕集团有限公司 | Micro-wave oven combining with other electric appliance |
-
2009
- 2009-05-05 CN CN 200910068751 patent/CN101881471B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3569656A (en) * | 1969-07-24 | 1971-03-09 | Bowmar Tic Inc | Automatic cooking cycle control system for microwave ovens |
| CN2133081Y (en) * | 1992-06-27 | 1993-05-12 | 国营燕南内燃机配件厂 | Multifunction protector for three-phase motor |
| KR100246415B1 (en) * | 1997-11-20 | 2000-04-01 | 구자홍 | Apparatus of controlling illumination for microwave oven |
| KR20060131412A (en) * | 2005-06-16 | 2006-12-20 | 엘지전자 주식회사 | Safety circuit of microwave oven |
| CN201177297Y (en) * | 2007-04-28 | 2009-01-07 | 广东格兰仕集团有限公司 | Micro-wave oven combining with other electric appliance |
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| Publication number | Publication date |
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| CN101881471B (en) | 2013-09-25 |
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