CN203549936U - Induction cooker with shutdown protection - Google Patents
Induction cooker with shutdown protection Download PDFInfo
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- CN203549936U CN203549936U CN201320333267.3U CN201320333267U CN203549936U CN 203549936 U CN203549936 U CN 203549936U CN 201320333267 U CN201320333267 U CN 201320333267U CN 203549936 U CN203549936 U CN 203549936U
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- shutdown
- switch
- detection circuit
- electromagnetic oven
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Abstract
The utility model discloses an induction cooker with shutdown protection, which belongs to the technical field of kitchen cooking equipment, and solves the technical problem of damage to a load element caused by shutdown with power of an existing induction cooker. The induction cooker disclosed by the utility model comprises a load unit, a switch circuit, a master control unit and a startup/shutdown detection circuit, wherein the load unit is connected with a power line through the switch circuit; the signal output end of the startup/shutdown detection circuit is connected to the master control unit; the switch circuit comprises a two-way tumbler switch and an electric switch, which are connected in parallel; the two-way tumbler switch is connected with the startup/shutdown detection circuit and controls signal output of the startup/shutdown detection circuit; the master control unit comprises a signal receiving module and a control module; in the shutdown state of the induction cooker, the signal receiving module receives a shutdown signal output by the startup/shutdown detection circuit, and the control module shuts down the load unit and controls the electronic switch to disconnect so as to achieve soft shutdown of the induction cooker.
Description
[technical field]
The utility model relates to a kind of electromagnetic oven, especially has the electromagnetic oven of shutdown defencive function, belongs to kitchen cooking equipment technical field.
[background technology]
In existing electromagnetic oven, power line is directly connected with the load elements in load circuit, user in use, the situation of not pulling out power supply is for a long time a lot, though electromagnetic oven is in holding state, inner filter inductance, rectifier bridge even load element are still in running order, not only waste electric energy, also and accelerated the aging of these electronic devices and components, affect electromagnetic oven service life; In addition, some user habits pull out electricity shutdown under electromagnetic oven duty, and this belt transect power closes chance firmly increases the damage probability of IGBT, rectifier bridge even load element, the situation of direct booster during easy appearance start next time energising.
[utility model content]
The utility model provides a kind of electromagnetic oven with shutdown protection, can realize the soft-off of electromagnetic oven, thus protection load elements, and the situation of the direct booster of can effectively avoiding starting shooting occurs.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of electromagnetic oven with shutdown protection, comprise load unit, on-off circuit and main control unit, described load unit is by on-off circuit connecting power line, also comprise starting-up/shutdown detection circuit, the signal output part of described starting-up/shutdown detection circuit is connected to main control unit, described on-off circuit comprises the ganged switch and the electronic switch that are connected in parallel, described ganged switch is also connected to starting-up/shutdown detection circuit and controls the signal output of starting-up/shutdown detection circuit, described main control unit comprises signal receiving module and control module, under electromagnetic oven off-mode, described signal receiving module receives the off signal of starting-up/shutdown detection circuit output, described control module is closed load unit and is controlled electronic switch and disconnects the soft-off of realizing electromagnetic oven.
Further, described ganged switch comprises forceful electric power switch and light current switch, and described forceful electric power switch is connected between load unit and power line, and described light current switch is connected to the signal output of starting-up/shutdown detection circuit control starting-up/shutdown detection circuit.
Further, described starting-up/shutdown detection circuit comprises the first divider resistance and the second divider resistance, described light current switch one end connects power end VCC by described the first divider resistance, the described light current switch other end forms described signal output part by described the second divider resistance ground connection, and described off signal is the low level signal producing on signal output part under starting-up/shutdown detection circuit off-state.
Further, described starting-up/shutdown detection circuit comprises the first divider resistance and the second divider resistance, described light current switch one end is by described the first divider resistance ground connection, the described light current switch other end connects power end VCC by described the second divider resistance and forms described signal output part, and described off signal is the high level signal producing on signal output part under starting-up/shutdown detection circuit off-state.
Further, described main control unit is single-chip microcomputer.
Further, described electromagnetic oven also comprises power-sensing circuit, described power-sensing circuit is connected between main control unit and load unit, and under electromagnetic oven open state, described power-sensing circuit detects the power rating that has of load unit, described control module control electronic switch closes.
Further, described load unit comprises IGBT and IGBT drive circuit, and under off-mode, described control module is closed according to the off signal control IGBT drive circuit of starting-up/shutdown detection circuit output.
Further, described ganged switch is double-pole single throw or double-point double-throw switch.
Further, described electronic switch is relay switch or power semiconductor switch.
The beneficial effects of the utility model:
Adopt after technique scheme, once user disconnects ganged switch, starting-up/shutdown detection circuit just can produce an off signal, signal receiving module receives the off signal of starting-up/shutdown detection circuit output, control module is closed load unit according to off signal, IGBT, the rectifier bridge even load element of electromagnetic oven inside are quit work, determine that IGBT, rectifier bridge even load element stop after power, when normally load elements no longer includes electric current and passes through, control module is controlled electronic switch again and is disconnected, and realizes the soft-off of electromagnetic oven.Like this, if electromagnetic oven is to shut down under holding state, user is without pulling out attaching plug, as long as disconnect ganged switch, just filter inductance, rectifier bridge even load element can quit work, no longer produces energy consumption, improves the electronic component life-span also to reach energy-conservation object; If electromagnetic oven is lower shutdown in working order; same only need of user disconnects ganged switch, until IGBT, rectifier bridge even load element, after stopping power, disconnects with power supply again, reduces switching loss; protection load elements, the booster situation occurring while effectively avoiding start shooting next time.
These features of the present utility model and advantage will be below the specific embodiment, accompanying drawing in detailed exposure.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the circuit theory diagrams of the utility model electromagnetic oven embodiment mono-;
Fig. 2 is the circuit theory diagrams of the utility model electromagnetic oven embodiment bis-.
[specific embodiment]
A kind of electromagnetic oven with shutdown protection, comprise load unit, on-off circuit and main control unit, load unit is by on-off circuit connecting power line, also comprise starting-up/shutdown detection circuit, the signal output part of starting-up/shutdown detection circuit is connected to main control unit, on-off circuit comprises the ganged switch and the electronic switch that are connected in parallel, ganged switch is also connected to starting-up/shutdown detection circuit and controls the signal output of starting-up/shutdown detection circuit, main control unit comprises signal receiving module and control module, under electromagnetic oven off-mode, described signal receiving module receives the off signal of starting-up/shutdown detection circuit output, control module is closed load unit and is controlled electronic switch and disconnects the soft-off of realizing electromagnetic oven.When not using electromagnetic oven, disconnect ganged switch, can make complete machine and power supply disconnect, reduce energy consumption; Under electromagnetic oven duty, disconnect ganged switch, can first turn-off IGBT, rectifier bridge even load element, stop realizing soft-off after power, thereby play a protective role.
Accompanying drawing below in conjunction with the utility model embodiment is explained and illustrated the technical scheme of the utility model embodiment, but following embodiment is only preferred embodiment of the present utility model, not all.Based on the embodiment in embodiment, those skilled in the art are other embodiment that obtains under the prerequisite of not making creative work, all belong to protection domain of the present utility model.
Embodiment mono-:
With reference to Fig. 1, the electromagnetic oven of the present embodiment, comprise load unit 3, on-off circuit, starting-up/shutdown detection circuit and main control unit 4, main control unit 4 comprises signal receiving module 41 and control module 42, load unit 3 is by on-off circuit connecting power line, on-off circuit comprises the double-pole single throw 1 and the relay switch 2 that are connected in parallel, wherein double-pole single throw 1 can be by user's manual operation, relay switch 2 is controlled by the control module 42 of main control unit 4, because double-pole single throw 1 and relay switch 2 are connected in parallel in circuit, only have double-pole single throw 1 and relay switch 2 all to disconnect, electromagnetic oven complete machine and power supply could be disconnected.
In the present embodiment, double-pole single throw 1 has forceful electric power switch 11 and light current switch 12, forceful electric power switch 11 and light current switch 12 link, and forceful electric power switch 11 is connected between load unit 3 and power line, and light current switch 12 is connected to the signal output of starting-up/shutdown detection circuit control starting-up/shutdown detection circuit.The starting-up/shutdown detection circuit of the present embodiment comprises the first divider resistance R1 and the second divider resistance R2, light current switch 12 one end connect power end VCC by the first divider resistance R1, and light current switch 12 other ends form described signal output part A by the second divider resistance R2 ground connection.
Original state: electromagnetic oven switches on power, in double-pole single throw 1 and the equal closed situation of relay switch 2, because the first divider resistance R1 connects power end VCC, the second divider resistance R2 ground connection, signal output part A can produce a higher level signal, signal receiving module 41 receives after this high level signal, and main control unit 4 is identified electromagnetic oven in open state after this high level signal being detected, and at this moment user can normally use electromagnetic oven;
Shutdown (readiness and shut off or the shutdown of band power): user disconnects double-pole single throw 1, because forceful electric power switch 11 and light current switch 12 link, a branch road of starting-up/shutdown detection circuit and on-off circuit is disconnected, but power supply still can keep being connected by relay switch 2 and electromagnetic oven complete machine; Because starting-up/shutdown detection circuit is disconnected, the second divider resistance R2 ground connection, at this moment at signal output part A, can produce a lower level signal, signal receiving module 4141 receives this low level signal, control module 42 detects that this low level signal judges that user need to close electromagnetic oven, and and then load unit 3 is closed, after load unit 3 stops power, control module 42 control relay switches 2 disconnect, and realize electromagnetic oven soft-off;
Start: user's double-pole single throw 1 that closes, because forceful electric power switch 11 and light current switch 12 link, a branch road of starting-up/shutdown detection circuit and on-off circuit is closed, power supply can access electromagnetic oven complete machine by forceful electric power switch 11, according to original state, signal output part A can produce a higher level signal, signal receiving module 41 receives after this high level signal, control module 42 detects that this high level signal judges that user need to use electromagnetic oven, and and then by control relay switch 2 closures, to treat shutdown next time.The electromagnetic oven of the present embodiment has also increased power-sensing circuit 5, power-sensing circuit 5 is connected between main control unit 4 and load unit 3, when user closes after double-pole single throw 1, load unit 3 is switched on and is produced power consumption, power-sensing circuit 5 detects after load unit 3 has power detection signal passed to control module 42, and control module 42 is controlled electronic switch closes.Above-mentioned power-sensing circuit 5, can be to adopt circuit for detection of the electric current of load unit 3 current signals, also can be the voltage sampling circuit for detection of load unit 3 voltage signals, its physical circuit structure belongs to those of ordinary skills' common practise.
In the present embodiment; load unit 3 comprises IGBT and IGBT drive circuit; control module 42 is first closed IGBT drive circuit after low level signal being detected; in IGBT, no longer including electric current passes through; control module 42 again control relay switch 2 disconnects; realize electromagnetic oven soft-off, thereby protected IGBT element, booster while avoiding start shooting its next time.Certainly, except IGBT, electromagnetic oven does inner filter inductance, rectifier bridge even load element can be protected equally in the scheme of the present embodiment.
Embodiment bis-:
With reference to Fig. 2, the difference of the present embodiment is: starting-up/shutdown detection circuit comprises the first divider resistance R1 and the second divider resistance R2, light current switch 12 one end are by the first divider resistance R1 ground connection, and light current switch 12 other ends connect power end VCC by the second divider resistance R2 and form described signal output part A.Like this, disconnect after ganged switch, what signal output part A produced is high level signal, and the signal receiving module 41 of main control unit 4 judges that user need to close electromagnetic oven after receiving this high level signal; After closed ganged switch, what signal output part A produced is low level signal, and signal receiving module 41 judges that user need to use electromagnetic oven after this low level signal being detected.Other structures of the present embodiment electromagnetic oven and operation principle all can, with reference to embodiment mono-, no longer describe in detail.
By above-described embodiment, the purpose of this utility model is by fully effective having reached.The personage who is familiar with this skill should be understood that the utility model includes but not limited to accompanying drawing and the content of describing in the specific embodiment above.Any modification that does not depart from function and structure principle of the present utility model all will be included in the scope of claims.
Claims (9)
1. one kind has the electromagnetic oven of shutdown protection, comprise load unit, on-off circuit and main control unit, described load unit is by on-off circuit connecting power line, it is characterized in that: also comprise starting-up/shutdown detection circuit, the signal output part of described starting-up/shutdown detection circuit is connected to main control unit, described on-off circuit comprises the ganged switch and the electronic switch that are connected in parallel, described ganged switch is also connected to starting-up/shutdown detection circuit and controls the signal output of starting-up/shutdown detection circuit, described main control unit comprises signal receiving module and control module, under electromagnetic oven off-mode, described signal receiving module receives the off signal of starting-up/shutdown detection circuit output, described control module is closed load unit and is controlled electronic switch and disconnects the soft-off of realizing electromagnetic oven.
2. a kind of electromagnetic oven with shutdown protection as claimed in claim 1; it is characterized in that: described ganged switch comprises forceful electric power switch and light current switch; described forceful electric power switch is connected between load unit and power line, and described light current switch is connected to the signal output of starting-up/shutdown detection circuit control starting-up/shutdown detection circuit.
3. a kind of electromagnetic oven with shutdown protection as claimed in claim 2; it is characterized in that: described starting-up/shutdown detection circuit comprises the first divider resistance and the second divider resistance; described light current switch one end connects power end VCC by described the first divider resistance; the described light current switch other end forms described signal output part by described the second divider resistance ground connection, and described off signal is the low level signal producing on signal output part under starting-up/shutdown detection circuit off-state.
4. a kind of electromagnetic oven with shutdown protection as claimed in claim 2; it is characterized in that: described starting-up/shutdown detection circuit comprises the first divider resistance and the second divider resistance; described light current switch one end is by described the first divider resistance ground connection; the described light current switch other end connects power end VCC by described the second divider resistance and forms described signal output part, and described off signal is the high level signal producing on signal output part under starting-up/shutdown detection circuit off-state.
5. as claimed in claim 1 or 2 or 3 or 4 a kind of has the electromagnetic oven of shutdown protection, it is characterized in that: described main control unit is single-chip microcomputer.
6. as claimed in claim 1 or 2 or 3 or 4 a kind of has the electromagnetic oven of shutdown protection; it is characterized in that: described electromagnetic oven also comprises power-sensing circuit; described power-sensing circuit is connected between main control unit and load unit; under electromagnetic oven open state, described power-sensing circuit detects the power rating that has of load unit, described control module control electronic switch closes.
7. as claimed in claim 1 or 2 or 3 or 4 a kind of has the electromagnetic oven of shutdown protection; it is characterized in that: described load unit comprises IGBT and IGBT drive circuit, under off-mode, described control module is closed according to the off signal control IGBT drive circuit of starting-up/shutdown detection circuit output.
8. as claimed in claim 1 or 2 or 3 or 4 a kind of has the electromagnetic oven of shutdown protection, it is characterized in that: described ganged switch is double-pole single throw or double-point double-throw switch.
9. as claimed in claim 1 or 2 or 3 or 4 a kind of has the electromagnetic oven of shutdown protection, it is characterized in that: described electronic switch is relay switch or power semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320333267.3U CN203549936U (en) | 2013-06-08 | 2013-06-08 | Induction cooker with shutdown protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320333267.3U CN203549936U (en) | 2013-06-08 | 2013-06-08 | Induction cooker with shutdown protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203549936U true CN203549936U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320333267.3U Expired - Fee Related CN203549936U (en) | 2013-06-08 | 2013-06-08 | Induction cooker with shutdown protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203549936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353243A (en) * | 2015-11-13 | 2016-02-24 | 魅族科技（中国）有限公司 | Load access automatic detection circuit and socket |
-
2013
- 2013-06-08 CN CN201320333267.3U patent/CN203549936U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353243A (en) * | 2015-11-13 | 2016-02-24 | 魅族科技（中国）有限公司 | Load access automatic detection circuit and socket |
| CN105353243B (en) * | 2015-11-13 | 2018-10-19 | 珠海市魅族科技有限公司 | A kind of circuit and socket of automatic detection load access |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310018 A District, No. 22, No. 52, Baiyang street, Hangzhou economic and Technological Development Zone, Zhejiang, China Patentee after: Hangzhou Jiuyang Mini Household Appliance Co., Ltd. Address before: 310018 A District, No. 22, No. 52, Baiyang street, Hangzhou economic and Technological Development Zone, Zhejiang, China Patentee before: Hangzhou Hongyang Ounanduo Electrical Appliances Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20200608 |