CN108988291A - Household electrical appliance and surge protective device for household electrical appliance - Google Patents
Household electrical appliance and surge protective device for household electrical appliance Download PDFInfo
- Publication number
- CN108988291A CN108988291A CN201710414831.7A CN201710414831A CN108988291A CN 108988291 A CN108988291 A CN 108988291A CN 201710414831 A CN201710414831 A CN 201710414831A CN 108988291 A CN108988291 A CN 108988291A
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- Prior art keywords
- surge
- electrical appliance
- household electrical
- voltage
- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of surge protective devices for household electrical appliance; it include: power network fluctuation limiting unit; its input terminal is connected with AC network; output end is connected with the input terminal of rectification unit, power network fluctuation limiting unit to when there is surging signal in electric main by the current limit of electric main within the scope of predetermined current；Surge detection unit, the voltage of surge detection unit real-time detection electric main, and surge protection signal is exported when the voltage of electric main is greater than predetermined voltage threshold；Control unit, control unit receive surge protection signal, and control household electrical appliance when receiving surge protection signal and stop working.The device slows down the impact of surge current by power network fluctuation limiting unit when surge is generated, and realizes the protection to household electrical appliance to make up the slow caused protection latency issue of surge detection speed to thoroughly solve the problems, such as high frequency flash surge impact.The invention also discloses a kind of household electrical appliance.
Description
Technical field
The present invention relates to household appliance technical field, in particular to a kind of surge protective device and one kind for household electrical appliance
Household electrical appliance with the surge protective device.
Background technique
Surge, as the term suggests it is exactly to occur moment exceeding the peak value of stationary value.The many because being known as of surge are generated, for example,
Power supply short circuit, power supply switching, thunder-strike phenomenon etc., and surge easilys lead to load such as power switch tube and damages
It is bad, it is therefore desirable to carry out surge protection.
In the related technology, mainly identify whether that surge occurs by adding resistor voltage divider circuit and comparison circuit, still
Since surge occurs that speed is fast, and the phenomenon that still having guard delay in this way, it is unrestrained can not thoroughly to solve high frequency flash
Gush shock problem.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
First purpose is to propose a kind of surge protective device for household electrical appliance, when surge generates, be limited by power network fluctuation
Unit processed slows down the impact of surge current, to make up the slow caused protection latency issue of surge detection speed, to thoroughly solve
High frequency flash surge impact problem realizes the protection to household electrical appliance.
Second object of the present invention is to propose a kind of household electrical appliance.
To achieve the above object, first aspect present invention embodiment proposes a kind of surge protection dress for household electrical appliance
It sets, comprising: power network fluctuation limiting unit, surge detection unit and control unit.Power network fluctuation limiting unit, the power grid wave
The input terminal of dynamic limiting unit is connected with AC network, output end and the rectification unit of the power network fluctuation limiting unit
Input terminal be connected, the power network fluctuation limiting unit to when there is surging signal in the electric main by the electric main
Current limit within the scope of predetermined current.Surge detection unit, the input terminal of the surge detection unit and the power grid wave
The input terminal of dynamic limiting unit is connected, the voltage of electric main described in the surge detection unit real-time detection, and in the friendship
Surge protection signal is exported when flowing the voltage of alternating current greater than predetermined voltage threshold.Control unit, the input terminal of described control unit
It is connected with the output end of the surge detection unit, described control unit receives the surge protection signal, and receiving
The household electrical appliance are controlled when stating surge protection signal to stop working.
Surge protective device according to an embodiment of the present invention for household electrical appliance, by increasing in the front end of rectification unit
Power network fluctuation limiting unit, with when surging signal occurs in electric main, by the current limit of electric main in predetermined current model
In enclosing, to slow down the impact to subsequent conditioning circuit, the slow caused protection latency issue of surge detection speed is compensated for, to thoroughly solve
It has determined high frequency flash surge impact problem, has realized the protection to household electrical appliance.
According to one embodiment of present invention, the power network fluctuation limiting unit includes: two be made of inductance and capacitor
Rank filter circuit, the T-type filter circuit being made of inductance and capacitor, the π type filter circuit being made of inductance and capacitor or by
The first-order filtering circuit that inductance is constituted.
According to one embodiment of present invention, the surge detection unit includes: voltage detecting circuit, the voltage detecting
The input terminal of circuit is connected with the input terminal of the power network fluctuation limiting unit, hands over described in the voltage detecting circuit real-time detection
Flow the voltage of alternating current；Comparison circuit, the first input end of the comparison circuit are connected with the output end of the voltage detecting circuit,
Second input terminal of the comparison circuit is connected with reference voltage end, wherein when the voltage of the electric main is greater than the ginseng
When examining the predetermined voltage threshold of voltage end, the comparison circuit exports the surge protection signal.
According to one embodiment of present invention, the surge detection unit further includes reference voltage output module, the ginseng
It examines voltage output module to be connected with the reference voltage end, the reference voltage output module is to export fixed predeterminated voltage
Threshold value, or output predetermined voltage threshold corresponding with the rated operational voltage of the household electrical appliance.
According to one embodiment of present invention, the surge detection unit further include: filtering processing circuit, at the filtering
The input terminal of reason circuit is connected with the output end of the voltage detecting circuit, the output end and the ratio of the filtering processing circuit
First input end compared with circuit is connected, and the filtering processing circuit is filtered to the voltage to the electric main.
According to one embodiment of present invention, the voltage detecting circuit includes reduction voltage circuit or voltage transformer.
To achieve the above object, second aspect of the present invention embodiment proposes a kind of household electrical appliance comprising the present invention the
The surge protective device that one side embodiment proposes.
The household electrical appliance of the embodiment of the present invention, by the above-mentioned surge protective device for household electrical appliance, by whole
The front end for flowing unit increases power network fluctuation limiting unit, with when surging signal occurs in electric main, by the electric current of electric main
It is limited within the scope of predetermined current, to slow down the impact to subsequent conditioning circuit, compensates for the slow caused protection of surge detection speed and prolong
Shi Wenti realizes the protection to household electrical appliance to thoroughly solve the problems, such as high frequency flash surge impact.
In an embodiment of the present invention, household electrical appliance may include electromagnetic oven, electric cooker or electric pressure cooking saucepan.
Detailed description of the invention
Fig. 1 is the block diagram of the surge protective device according to an embodiment of the present invention for household electrical appliance；
Fig. 2 a is the circuit diagram of the surge protective device according to an embodiment of the invention for household electrical appliance；
Fig. 2 b is the circuit diagram of the surge protective device in accordance with another embodiment of the present invention for household electrical appliance；
Fig. 2 c is the circuit diagram of the surge protective device for household electrical appliance of another embodiment according to the present invention；
Fig. 2 d is the circuit diagram of the surge protective device for household electrical appliance of further embodiment according to the present invention；
Fig. 3 is the block diagram of the surge protective device according to an embodiment of the invention for household electrical appliance；With
And
Fig. 4 is the block diagram of household electrical appliance according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawings come describe the surge protective device proposed according to embodiments of the present invention for household electrical appliance and
Household electrical appliance with the surge protective device.
Fig. 1 is the block diagram of the surge protective device according to an embodiment of the present invention for household electrical appliance.In this hair
In bright embodiment, household electrical appliance include rectification unit 40, and rectification unit 40 is to be converted to pulsation for input AC alternating current
Direct current.
As shown in Figure 1, the surge protective device for household electrical appliance of the embodiment of the present invention may include power network fluctuation limitation
Unit 10, surge detection unit 20 and control unit 30.
Wherein, power network fluctuation limiting unit 10 is to limit the electric current of electric main when surging signal occurs in electric main
Within the scope of predetermined current, the input terminal of power network fluctuation limiting unit 10 is connected system with AC network AC, and power network fluctuation limitation is single
The output end of member 10 is connected with the input terminal of rectification unit 40.The input terminal and power network fluctuation limiting unit of surge detection unit 20
10 input terminal is connected, the voltage of 20 real-time detection electric main of surge detection unit, and is greater than in advance in the voltage of electric main
If exporting surge protection signal when voltage threshold.The input terminal of control unit 30 is connected with the output end of surge detection unit 20,
Control unit 30 receives surge protection signal, and controls household electrical appliance when receiving surge protection signal and stop working.
Wherein, predetermined current, predetermined voltage threshold can be demarcated according to the actual situation.
Specifically, since surge is a kind of violent pulse occurred in a short time, and it includes surge voltage and wave
Gush electric current, and if only pass through the voltage of 20 real-time detection electric main of surge detection unit, and judgement is according to testing result
No generation surge, and household electrical appliance are controlled according to judging result and are stopped working, to realize surge protection, even when surge is examined
It surveys unit 20 and uses pure hardware circuit, detection speed is for high frequency flash surge and slow, and still having can
Household electrical appliance can be caused to impact.
So in an embodiment of the present invention, a power network fluctuation limiting unit 10 is added in the front end of rectification unit 40,
Current limliting is carried out to electric main by power network fluctuation limiting unit 10, it, can be by having inductance such as when there is surging signal
Circuit to carry out current limliting to surge current, so that electric current slowly rises, and during electric current slowly rises, it is detected by surge single
First 20 pairs of surge voltages detect, and control unit 30 according to testing result controls household electrical appliance, when electric current rises to
When certain value, control unit 30 has carried out surge protection control to household electrical appliance.Therefore, pass through power network fluctuation limiting unit
The limitation of 10 pairs of electric currents is to have striven for the time for the detection of surge voltage, to compensate for the slow caused protection of surge detection speed
Delay issue, and then thoroughly solve the problems, such as high frequency flash surge impact, realize the effective protection to household electrical appliance.
Further, in an embodiment of the present invention, as shown in Fig. 2 a- Fig. 2 d, power network fluctuation limiting unit 10 may include
The second-order filter circuit that is made of inductance and capacitor, the T-type filter circuit being made of inductance and capacitor are made of inductance and capacitor
π type filter circuit or the first-order filtering circuit that is made of inductance.
Specifically, power network fluctuation limiting unit 10 may include passive low-pass filter circuit.For example, shown in Fig. 2 a, electricity
Net fluctuation limiting unit 10 may include that the LC second-order filter circuit being made of inductance L1 and capacitor C1 (can also be in parallel by capacitor C1
In the front end of inductance L1, to constitute CL second-order filter circuit)；As shown in Figure 2 b, power network fluctuation limiting unit 10 may include by electricity
Feel L1, the CLC π type filter circuit that capacitor C1 and C2 are constituted；As shown in Figure 2 c, power network fluctuation limiting unit 10 may include by inductance
The LCL T-type filter circuit that L1, inductance L2 and C1 are constituted；As shown in Figure 2 d, power network fluctuation limiting unit 10 may include by inductance
The first-order filtering circuit that L1 is constituted.
In addition, in an embodiment of the present invention, as shown in Fig. 2 a- Fig. 2 d, the surge protective device for household electrical appliance is also
It may include varistor R1, varistor R1 is connected in parallel on the input terminal of power network fluctuation limiting unit 10, wherein works as electric main
Voltage be more than secure threshold when, varistor R1 conducting, subsequent conditioning circuit is damaged to prevent overtension.
It is illustrated by taking electromagnetic oven as an example below.As shown in Figure 2 a, when electric main is normal, electric main is rectified
Circuit 40 exports stable DC and powers (physical circuit is not detailed here) to electromagnetic heating circuit 50 after rectifying.
When surge occurs in electric main, hinder to make since the inductance L1 in power network fluctuation limiting unit 10 has electric current
With, so surge current is difficult to rise to very high value in a short time, thus realize the limitation to surge current, guarantee electric current
Stability, prevent that subsequent electromagnetic heating circuit 50 is caused to impact；Meanwhile surge detection unit 20 examines surge voltage
It surveys, when having detected surge voltage, exports surge protection signal to control unit 30, control unit 30 is believed according to surge protection
Number stop IGBT of the output drive signal into electromagnetic heating system 50, the collector voltage of IGBT is excessively high and damages to prevent.
In addition, varistor R1 will be connected when surge voltage is more than secure threshold (secure threshold is greater than predetermined voltage threshold), from
And realize the quick protection to household electrical appliance.
Therefore, in an embodiment of the present invention, by the low-pass filter circuit in power network fluctuation limiting unit to alternating current
Surge current in net is limited, and detects whether that surge occurs by surge detection unit, and when surge occurs to family
Electrical appliance is protected.
Wherein, in one embodiment of the invention, as shown in figure 3, surge detection unit 20 may include voltage detecting electricity
Road 21 and comparison circuit 22.The input terminal of voltage detecting circuit 21 is connected with the input terminal of power network fluctuation limiting unit 10, voltage
The voltage of 21 real-time detection electric main of detection circuit；The output of the first input end and voltage detecting circuit 21 of comparison circuit 22
End is connected, and the second input terminal of comparison circuit is connected with reference voltage end Vth, when the voltage of electric main is greater than reference voltage end
When the predetermined voltage threshold of Vth, comparison circuit 22 exports surge protection signal.
In an embodiment of the present invention, voltage detecting circuit 21 may include reduction voltage circuit or voltage transformer.
Further, as shown in figure 3, surge detection unit 20 may also include reference voltage output module 23, reference voltage
Output module 23 is connected with reference voltage end Vth, reference voltage output module 23 exporting fixed predetermined voltage threshold, or
Person exports predetermined voltage threshold corresponding with the rated operational voltage of household electrical appliance.
In addition, as shown in figure 3, surge detection unit 20 may also include filtering processing circuit 24, filtering processing circuit 24 with
The output end of voltage detecting circuit 21 is connected, and the first input end phase of the output end and comparison circuit 22 of circuit 24 is filtered
Even.
Specifically, when the voltage to electric main detects (two partial pressure electricity can be can be by reduction voltage circuit
Hinder in series) or voltage transformer voltage is detected, and by be filtered circuit 24 be filtered, then
It is input to the first input end of comparison circuit 22 (such as comparator).22 pairs of comparison circuit filtering processing circuits 24 export voltage with
The predetermined voltage threshold that reference voltage end Vth is provided is compared, which can be fixed value, be also possible to lead to
The value that reference voltage output module 23 is selected according to current electric main is crossed, so that judgement is more in line with actual conditions.If filter
The voltage that wave processing circuit 24 exports is greater than the predetermined voltage threshold that reference voltage end Vth is provided, then comparison circuit 22 exports wave
Protection signal (such as high level signal) is gushed to control unit 30.When control unit 30 receives surge protection signal, take
The safeguard measure of effect, such as control household electrical appliance stop working, to realize the surge protection to household electrical appliance.
It is understood that in an embodiment of the present invention, comparison circuit 20 can be realized by software mode, but signal
Transmission can have certain delay, so comparison circuit 20 uses pure hardware circuit knot in order to improve protection speed as far as possible
Structure, for example, using comparator to realize the comparison of voltage and the output of surge protection signal.
In conclusion the surge protective device of household electrical appliance according to an embodiment of the present invention, by before rectification unit
End increases power network fluctuation limiting unit, when surging signal occurs in electric main, the current limit of electric main to be preset
In current range, to slow down the impact to subsequent conditioning circuit, the slow caused protection latency issue of surge detection speed is compensated for, thus
It thoroughly solves the problems, such as high frequency flash surge impact, realizes the protection to household electrical appliance, and circuit structure is simple and reliable,
It is easily achieved.
Fig. 4 is the block diagram of the household electrical appliance of embodiment according to the present invention, as shown in figure 4, the household electrical appliance
1000 may include the above-mentioned surge protective device 100 for household electrical appliance.
In an embodiment of the present invention, household electrical appliance 1000 may include electromagnetic oven, electric cooker or electric pressure cooking saucepan etc., tool
I will not elaborate for body running principle.
The household electrical appliance of the embodiment of the present invention, by above-mentioned surge protective device, by increasing in the front end of rectification unit
Add power network fluctuation limiting unit, with when surging signal occurs in electric main, by the current limit of electric main in predetermined current
In range, to slow down the impact to subsequent conditioning circuit, the slow caused protection latency issue of surge detection speed is compensated for, thus thoroughly
It solves the problems, such as high frequency flash surge impact, realizes the protection to household electrical appliance.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. a kind of surge protective device for household electrical appliance, which is characterized in that the household electrical appliance include rectification unit, described
Direct current of the rectification unit the electric main of input to be converted to pulsation, the surge protective device include:
The input terminal of power network fluctuation limiting unit, the power network fluctuation limiting unit is connected with AC network, the power network fluctuation
The output end of limiting unit is connected with the input terminal of the rectification unit, and the power network fluctuation limiting unit is in the exchange
When there is surging signal in alternating current by the current limit of the electric main within the scope of predetermined current；
Surge detection unit, the input terminal of the surge detection unit are connected with the input terminal of the power network fluctuation limiting unit,
The voltage of electric main described in the surge detection unit real-time detection, and it is greater than predeterminated voltage in the voltage of the electric main
Surge protection signal is exported when threshold value；
Control unit, the input terminal of described control unit are connected with the output end of the surge detection unit, described control unit
The surge protection signal is received, and controls the household electrical appliance when receiving the surge protection signal and stops working.
2. being used for the surge protective device of household electrical appliance as described in claim 1, which is characterized in that the power network fluctuation limitation
Unit includes: the second-order filter circuit being made of inductance and capacitor, the T-type filter circuit being made of inductance and capacitor, by inductance
The π type filter circuit constituted with capacitor or the first-order filtering circuit being made of inductance.
3. being used for the surge protective device of household electrical appliance as claimed in claim 1 or 2, which is characterized in that the surge detection
Unit includes:
Voltage detecting circuit, the input terminal of the voltage detecting circuit are connected with the input terminal of the power network fluctuation limiting unit,
The voltage of electric main described in the voltage detecting circuit real-time detection；
Comparison circuit, the first input end of the comparison circuit are connected with the output end of the voltage detecting circuit, the comparison
Second input terminal of circuit is connected with reference voltage end, wherein when the voltage of the electric main is greater than the reference voltage end
Predetermined voltage threshold when, the comparison circuit exports the surge protection signal.
4. being used for the surge protective device of household electrical appliance as claimed in claim 3, which is characterized in that the surge detection unit
Further include:
Reference voltage output module, the reference voltage output module are connected with the reference voltage end, and the reference voltage is defeated
Module is exporting fixed predetermined voltage threshold out, or output is corresponding with the rated operational voltage of the household electrical appliance
Predetermined voltage threshold.
5. being used for the surge protective device of household electrical appliance as claimed in claim 3, which is characterized in that the surge detection unit
Further include:
Circuit is filtered, the input terminal of the filtering processing circuit is connected with the output end of the voltage detecting circuit, described
The output end of filtering processing circuit is connected with the first input end of the comparison circuit, and the filtering processing circuit is to described
The voltage of electric main is filtered.
6. being used for the surge protective device of household electrical appliance as claimed in claim 3, which is characterized in that the voltage detecting circuit
Including reduction voltage circuit or voltage transformer.
7. a kind of household electrical appliance, which is characterized in that including the wave such as of any of claims 1-6 for household electrical appliance
Gush protective device.
8. household electrical appliance as claimed in claim 7, which is characterized in that the household electrical appliance include electromagnetic oven, electric cooker or
Electric pressure cooking saucepan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414831.7A CN108988291A (en) | 2017-06-05 | 2017-06-05 | Household electrical appliance and surge protective device for household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414831.7A CN108988291A (en) | 2017-06-05 | 2017-06-05 | Household electrical appliance and surge protective device for household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108988291A true CN108988291A (en) | 2018-12-11 |
Family
ID=64502689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710414831.7A Pending CN108988291A (en) | 2017-06-05 | 2017-06-05 | Household electrical appliance and surge protective device for household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988291A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859984Y (en) * | 2005-10-27 | 2007-01-17 | 深圳市拓邦电子科技股份有限公司 | Electromagnetic oven control device |
| CN201178498Y (en) * | 2008-04-03 | 2009-01-07 | 深圳和而泰智能控制股份有限公司 | Surge protection circuit for electromagentic furnace |
| CN101754507A (en) * | 2008-12-12 | 2010-06-23 | 深圳市鑫汇科科技有限公司 | Electromagnetic oven circuit based on SoC chip |
| CN202679686U (en) * | 2012-05-09 | 2013-01-16 | 九阳股份有限公司 | Voltage sampling and surge protection circuit of electromagnetic stove |
| CN205812425U (en) * | 2016-04-25 | 2016-12-14 | 九阳股份有限公司 | A kind of kitchen appliance surge protection circuit |
-
2017
- 2017-06-05 CN CN201710414831.7A patent/CN108988291A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859984Y (en) * | 2005-10-27 | 2007-01-17 | 深圳市拓邦电子科技股份有限公司 | Electromagnetic oven control device |
| CN201178498Y (en) * | 2008-04-03 | 2009-01-07 | 深圳和而泰智能控制股份有限公司 | Surge protection circuit for electromagentic furnace |
| CN101754507A (en) * | 2008-12-12 | 2010-06-23 | 深圳市鑫汇科科技有限公司 | Electromagnetic oven circuit based on SoC chip |
| CN202679686U (en) * | 2012-05-09 | 2013-01-16 | 九阳股份有限公司 | Voltage sampling and surge protection circuit of electromagnetic stove |
| CN205812425U (en) * | 2016-04-25 | 2016-12-14 | 九阳股份有限公司 | A kind of kitchen appliance surge protection circuit |
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Application publication date: 20181211 |
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