CN101883452A - Microwave oven capable of automatically identifying condition of not heating - Google Patents
Microwave oven capable of automatically identifying condition of not heating Download PDFInfo
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- CN101883452A CN101883452A CN2009100687535A CN200910068753A CN101883452A CN 101883452 A CN101883452 A CN 101883452A CN 2009100687535 A CN2009100687535 A CN 2009100687535A CN 200910068753 A CN200910068753 A CN 200910068753A CN 101883452 A CN101883452 A CN 101883452A
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- microwave oven
- relay
- control chip
- master control
- triode
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Abstract
The invention discloses a microwave oven capable of automatically identifying the condition of not heating. Compared the microwave oven in the prior art, the microwave oven capable of automatically identifying the condition of not heating can detect the working condition of a protecting diode which is matched with each relay in real time, acquire the specific position of the short-circuited protecting diode, and send an alarm to a user, so that the microwave oven capable of automatically identifying the condition of not heating greatly reduces potential safety hazard of microwave oven products, enhances product use experience of the user, and has great significance for the production practice.
Description
Technical field
The present invention relates to the microwave oven technical field, particularly relate to a kind of microwave oven of automatic identification case without heating.
Background technology
Microwave 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, microwave 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 material 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, microwave oven is heat food well, has obtained utilization widely in daily life.
At present, as shown in Figure 1, microwave 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 microwave oven, peripheral workpiece such as magnetron 2, barbecue tube 3, rotary tray motor 41, fan electromotor 42, stove lamp 5 form microwave 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 control switch (being conducting or disconnection) by a relay 1, 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 1 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 master control chip 10 and relay 1 that operating voltage is provided, the input of relay 1 is connected with master 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.
Generally be parallel with protecting diode on each relay 1 at present; by this protecting diode, can produce induced electromotive force in the relay sudden power or on it during overtension, this protecting diode of conducting; make the voltage at relay 1 two ends be stabilized in 12V, play clamping action.
But; when if above-mentioned protecting diode is short-circuited; because protecting diode is in parallel with relay 1, thereby relay 1 is fallen by short circuit, without electric current; make relay 1 to switch on to carry out normally closed and play the effect of switching current; thereby can't drive the peripheral workpiece action of this relay 1 correspondence, cause microwave oven not heat, microwave oven generation operation troubles; and the comparatively hidden and difficult discovery of this phenomenon badly influences user's product use experience.
Summary of the invention
In view of this; the microwave oven that the purpose of this invention is to provide a kind of automatic identification case without heating; can be in real time to each relay the working condition of supporting protecting diode detect; automatically discern the situation that microwave oven does not heat; know the particular location of the protecting diode that is short-circuited, the user is reported to the police, greatly reduce the potential safety hazard of microwave 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, each relay 1 is parallel with a protecting diode, the input of described relay 1 is connected with master control chip 10 by control triode 6, the direct workpiece that is connected with microwave oven supply power 20 and is connected each microwave oven of the output of described relay 1, be provided with between the input of each described relay 1 and the master control chip 10 and detect loop 40, whether the protecting diode that is used to detect relay 1 and coupling is short-circuited, also include detection module 100 in the described master control chip 10, be connected with detection loop 40, be used for when receiving the high level signal of described detection loop input, sending warning to the user;
This microwave oven also includes transformer 30, and this transformer 30 is connected with microwave oven supply power 20, is used to master control chip 10, relay 1 that operating voltage is provided;
Above-mentioned relay 1 is respectively applied for the switch of each workpiece in the controlled microwave stove.
Preferably, the base stage of described control triode 6 connects master control chip 10, grounded emitter, and collector electrode connects described relay 1.
Preferably, described detection loop 40 includes a detection with triode, two resistance and the filter circuit that electric capacity is formed.
Preferably, described detection is connected with the input of relay 1 with the emitter of triode, described detection is the power supply of 5V with the base stage external voltage of triode, and its collector electrode links to each other with three detection port of detection module 100 in the master control chip 10 by a filter circuit.
Preferably, described detection module 100 is connected with the display screen of microwave oven, and this display screen is used to the warning message that shows that detection module 100 sends to the user.
By above technical scheme provided by the invention as seen; compare with the microwave oven of prior art; the present invention proposes a kind of microwave oven of automatic identification case without heating; can be in real time to each relay the working condition of supporting protecting diode detect; automatically discern the situation that microwave oven does not heat; know the particular location of the protecting diode that is short-circuited; the user is reported to the police; greatly reduce the potential safety hazard of microwave 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 microwave oven structure block diagram of a kind of automatic identification case without heating provided by the invention;
Fig. 5 is the physical circuit schematic diagram of the microwave oven of a kind of automatic identification case without heating provided by the invention shown in Figure 4.
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 microwave oven structure block diagram of a kind of automatic identification case without heating provided by the invention;
Referring to Fig. 4, the invention provides a kind of novel safe microwave oven, this microwave 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 microwave 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 microwave oven together.
In the present invention, the input of described relay 1 is connected with master control chip 10 by control triode 6, the direct workpiece that is connected with microwave oven supply power 20 and is connected each microwave oven of the output of described relay 1.
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 master control chip 10 is direct current 5V, so master control chip 10 is by the peripheral forceful electric power circuit of relay 1 indirect controlled microwave stove.When relay 1 needed action, master 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 master control chip 10, grounded emitter, and collector electrode connects described relay 1.
In the present invention, described master control chip 10 is used for the operation of each workpiece of microwave oven is controlled, for example, make the operation of microwave oven workpiece if desired, master 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 microwave oven workpiece operation, the output level of relay 1 is a high level;
Certainly, if do not need to make the operation of microwave oven workpiece, master 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 microwave 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.
Referring to Fig. 4, microwave oven of the present invention includes transformer 30, and this transformer 30 is connected with microwave oven supply power 20, be used to master control chip 10, relay 1 that operating voltage is provided, in the present invention, the operating voltage of described relay 1 is 12V, and the working power of master control chip 10 is 5V.
In the present invention, be parallel with protecting diode on each relay 1, by this protecting diode; can produce induced electromotive force in the relay sudden power or on it during overtension; this protecting diode of conducting makes the voltage at relay 1 two ends be stabilized in 12V, plays clamping action.
For in real time to each relay the working condition of supporting protecting diode detect; know the particular location of the protecting diode that is short-circuited; the user is reported to the police; referring to Fig. 4; Fig. 5; the present invention is provided with between the input of each described relay 1 and master control chip 10 and detects loop 40; whether the protecting diode that is used to detect relay 1 and coupling is short-circuited; this detection loop 40 includes a detection triode that can play on-off action; two resistance and the filter circuit that electric capacity is formed; described master control chip 10 also includes detection module 100; be connected with detection loop 40; be used for when receiving the high level signal of described detection loop input, sending warning to the user.
On the specific implementation, described detection module 100 is connected with the display screen of microwave oven, and this display screen is used to the warning message that shows that detection module 100 sends to the user.
Referring to Fig. 5, described detection is connected with the input of relay 1 with the emitter of triode (as the Q110 among the figure, Q111, Q112), described detection is the power supply of 5V with the base stage external voltage of triode, and its collector electrode links to each other with three detection port of detection module 100 in the master control chip 10 by a filter circuit.Detection triode shown in Figure 5 is the positive-negative-positive triode.
Need to prove that for the present invention, in view of transformer 30 is 12V for the operating voltage that relay 1 provides, when microwave oven did not move, the voltage that detects the emitter terminal of using triode all was 12V; And when regular event, because the dividing potential drop effect of relay 1 resistance own, therefore the resistance of relay 1 itself, detect the undertension 1V with the transistor emitter end far above the resistance in the filter circuit after the series connection dividing potential drop, and detecting can saturation conduction with triode.And when the protecting diode of relay 1 parallel connection is short-circuited fault; relay 1 is fallen by short circuit; without electric current; at this moment; the voltage of 12V has been applied to and has detected on the circuit branch of forming with triode and filter circuit, detects and uses triode conducting, the voltage height of its emitter terminal; the high level signal of the 5V of its output is given master control chip 10, the detection module 100 in the master control chip.Detection module 100 is when receiving the high level signal of described detection loop 40 inputs, and the display screen by microwave oven sends warning to the user, realizes the purpose of identification microwave oven case without heating automatically.
In sum; compare with the microwave oven of prior art; compare with the microwave oven of prior art; the present invention proposes a kind of microwave oven of automatic identification case without heating, can be in real time to each relay the working condition of supporting protecting diode detect, know the particular location of the protecting diode that is short-circuited; the user is reported to the police; greatly reduce the potential safety hazard of microwave 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 (5)
1. automatic microwave oven of identification case without heating, it is characterized in that, include at least one relay (1), each relay (1) is parallel with a protecting diode, the input of described relay (1) is connected with master control chip (10) by control triode (6), the direct workpiece that is connected with microwave oven supply power (20) and is connected each microwave oven of the output of described relay (1), be provided with between the input of each described relay (1) and the master control chip (10) and detect loop (40), whether the protecting diode that is used to detect relay (1) and coupling is short-circuited, also include detection module (100) in the described master control chip (10), be connected with detection loop (40), be used for when receiving the high level signal of described detection loop input, sending warning to the user;
This microwave oven also includes transformer (30), and this transformer (30) is connected with microwave oven supply power (20), is used to master control chip (10), relay (1) that operating voltage is provided;
Above-mentioned relay (1) is respectively applied for the switch of each workpiece in the controlled microwave stove.
2. microwave oven as claimed in claim 1 is characterized in that, the base stage of described control triode (6) connects master control chip (10), grounded emitter, and collector electrode connects described relay (1).
3. microwave oven as claimed in claim 1 is characterized in that, described detection loop (40) includes the filter circuit of a detection with triode, two resistance and an electric capacity composition.
4. microwave oven as claimed in claim 1, it is characterized in that, described detection is connected with the input of relay (1) with the emitter of triode, described detection is the power supply of 5V with the base stage external voltage of triode, and its collector electrode links to each other with three detection port of detection module (100) in the master control chip (10) by a filter circuit.
5. as each described microwave oven in the claim 1 to 4, it is characterized in that described detection module (100) is connected with the display screen of microwave oven, this display screen is used to the warning message that shows that detection module (100) sends to the user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100687535A CN101883452A (en) | 2009-05-05 | 2009-05-05 | Microwave oven capable of automatically identifying condition of not heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100687535A CN101883452A (en) | 2009-05-05 | 2009-05-05 | Microwave oven capable of automatically identifying condition of not heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101883452A true CN101883452A (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100687535A Pending CN101883452A (en) | 2009-05-05 | 2009-05-05 | Microwave oven capable of automatically identifying condition of not heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101883452A (en) |
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2009
- 2009-05-05 CN CN2009100687535A patent/CN101883452A/en active Pending
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Application publication date: 20101110 |