CN206274367U - Anti-dry protection circuit and use its household electrical appliance - Google Patents
Anti-dry protection circuit and use its household electrical appliance Download PDFInfo
- Publication number
- CN206274367U CN206274367U CN201621446677.9U CN201621446677U CN206274367U CN 206274367 U CN206274367 U CN 206274367U CN 201621446677 U CN201621446677 U CN 201621446677U CN 206274367 U CN206274367 U CN 206274367U
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- circuit
- atomizing piece
- electrical appliance
- household electrical
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Abstract
The utility model discloses a kind of anti-dry protection circuit and use its household electrical appliance; it includes power circuit, atomizing piece; being mainly technically characterized by it also includes atomization piece driving circuit, current detection circuit, main control singlechip; DC conversion is high frequency electric by atomization piece driving circuit; current detection circuit detects the operating current of atomizing piece; atomization piece driving circuit is connected with atomizing piece; current detection circuit is concatenated between atomization piece driving circuit and ground, main control singlechip is connected with power circuit, atomization piece driving circuit, current detection circuit.The features such as with effectively making anti-dry protection circuit detect accurate, safe and reliable, durable in use, with low cost.
Description
Technical field
The utility model is related to a kind of anti-dry protection circuit and uses its household electrical appliance, and particularly a kind of anti-dry is protected
Protection circuit and use its household electrical appliance.
Background technology
Many household appliances in the prior art, such as humidifier, fumigating machine, beauty instrument product, it is necessary to make water fogging, with
Realize the functions such as humidification, dedusting or champignon.
During being atomized to water, water can be gradually used up totally these products, may finally cause dry combustion method so as to
Damage atomizing piece.To avoid the occurrence of dry combustion method phenomenon, prior art generally increased water shortage detection circuit in atomization circuit.
Existing water shortage detection circuit typically uses capacitance detecting mode or metal electrode detection mode, this kind of mode to exist
Metal bar polarizes or problem of oxidation, easily causes the inaccurate situation of detection, and also there is the hidden danger of electric leakage.
Other existing detection mode is active detection mode, there are problems that complex structure and.
To overcome drawbacks described above, certain improvement is made that to anti-dry protection circuit and using its household electrical appliance.
The content of the invention
Technical problem to be solved in the utility model is：
A kind of anti-dry protection circuit is provided and its household electrical appliance are used, it detects effectively anti-dry protection circuit
Accurately, it is safe and reliable, durable in use, with low cost.
The utility model solve its technical problem use technical scheme be：
A kind of anti-dry protection circuit, it includes power circuit, atomizing piece, and it also includes atomization piece driving circuit, electric current
DC conversion is high frequency electric, current detection circuit detection atomization by detection circuit, main control singlechip, atomization piece driving circuit
The operating current of piece, atomization piece driving circuit is connected with atomizing piece, and current detecting electricity is concatenated between atomization piece driving circuit and ground
Road, main control singlechip is connected with power circuit, atomization piece driving circuit, current detection circuit.
Atomization piece driving circuit includes FET, and the grid of FET connects high-frequency driving signal, and by the 4th
Resistance connects the source electrode of FET, the source electrode connection current detection circuit of FET, the drain electrode connection first of FET
One end of inductance, the other end connection connection power end of the first inductance, the source electrode of FET is through the second capacitance connection to output
The positive pole of interface, the negative pole ground connection of output interface.
Current detection circuit includes detection resistance, and detection resistance one end connects the 5th electric capacity, one end of the 5th resistance, field effect
Should pipe source electrode, the other end ground connection of detection resistance and the 5th electric capacity, one end of the resistance of another termination the 5th of detection resistance is simultaneously
Output atomizing piece operating current signal, the other end ground connection of the 5th resistance.
Main control singlechip is QA8F12048N3 single-chip microcomputers, the controlled output pin connection field-effect of QA8F12048N3 single-chip microcomputers
The grid of pipe, the signal input pin of QA8F12048N3 single-chip microcomputers accesses atomizing piece operating current signal.
QA8F12048N3 single-chip microcomputers include the MCU kernels of 8 RISC, timer, ROM and RAM memories, I/O drive,
PFD drives, PWM drives, imitate IXD drivings, converter, timer, Shi Ji.
Atomizing piece is ceramic atomizing piece.
A kind of household electrical appliance, it includes above-mentioned anti-dry protection circuit.
Described household electrical appliance are humidifier.
Described household electrical appliance are fumigating machine.
Described household electrical appliance are beauty instrument.
Beneficial effect of the utility model produced by compared with background technology：
Because the utility model is using atomization piece driving circuit, current detection circuit, main control singlechip, atomizing piece drives electricity
DC conversion is high frequency electric by road, and current detection circuit detects the operating current of atomizing piece, is atomized piece driving circuit and mist
Change piece connection, current detection circuit is concatenated between atomization piece driving circuit and ground, main control singlechip drives with power circuit, atomizing piece
Dynamic circuit, the circuit draw bail of current detection circuit connection, send high frequency and drive from main control singlechip to atomization piece driving circuit
Direct current is converted to the high-frequency drive pulse for driving atomizing piece to work, atomization piece driving circuit and ground by dynamic signal to control it
Between concatenate current detection circuit, atomizing piece operating current signal is fed back to main control singlechip, master control monolithic by current detection circuit
Machine controls whether to send high-frequency driving signal according to the size of the current signal, therefore it can effectively make anti-dry protection circuit
Detection is accurate, safe and reliable, durable in use, with low cost.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model, below will be attached to what is used needed for implementation method
Figure is briefly described, it should be apparent that, drawings in the following description are only some implementation methods of the present utility model, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the circuit connection logic diagram of embodiment in the utility model.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe.
Obviously, described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Base
Embodiment in the utility model, the institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There are other embodiments, belong to the scope of the utility model protection.
Referring to shown in accompanying drawing 1, the present embodiment includes a kind of anti-dry protection circuit, it include power circuit 1, atomizing piece 2,
DC conversion is high-frequency electrical by atomization piece driving circuit 3, current detection circuit 4, main control singlechip 5, atomization piece driving circuit 3
Stream, current detection circuit 4 detects the operating current of atomizing piece, and atomization piece driving circuit 3 is connected with atomizing piece 2, and atomizing piece drives
Current detection circuit 4, main control singlechip 5 and power circuit 1, atomization piece driving circuit 3, electric current inspection are concatenated between circuit 3 and ground
Slowdown monitoring circuit 4 is connected.
Main control singlechip 5, is used to send high-frequency driving signal.
Atomization piece driving circuit 3, direct current is converted to drive what atomizing piece 2 worked under the control of high-frequency driving signal
High-frequency drive pulse.
Current detection circuit 4, is made up of passive device, is used to detect the operating current signal of atomizing piece 2, and work is electric
Stream signal feeds back to main control singlechip 5.
Main control singlechip 5 controls whether to send high-frequency driving signal according to the size of the current signal, that is to say, that main
Control single-chip microcomputer 5 controls whether atomizing piece 2 works according to the current signal that current detection circuit 4 is detected.When the water in product is complete
After portion's evaporation, the current signal of the detection of current detection circuit 4 there occurs larger change, and now main control singlechip 5 stops output
High-frequency driving signal, atomizing piece 2 is soon stopped, and reaches the purpose of anti-dry.
Atomization piece driving circuit 3 includes FET, and the grid of FET connects high-frequency driving signal, and by the 4th
Resistance connects the source electrode of FET, the source electrode connection current detection circuit 4 of FET, the drain electrode connection first of FET
One end of inductance, the other end connection connection power end of the first inductance, the source electrode of FET is through the second capacitance connection to output
The positive pole of interface, the negative pole ground connection of output interface.During work, high-frequency driving signal is added in the grid of FET, high-frequency drive
The frequency of signal is 1.7M, power circuit output 25V, and the first inductance and the second electric capacity further raises voltage, allows atomizing piece 2
Work is in than larger power, the need for ensuring that atomization quantity can reach product.
Current detection circuit 4 includes detection resistance, and detection resistance one end connects the 5th electric capacity, one end, the field of the 5th resistance
The other end ground connection of the source electrode of effect pipe, detection resistance and the 5th electric capacity, one end of the resistance of another termination the 5th of detection resistance
And export atomizing piece operating current signal, the other end ground connection of the 5th resistance.Detection resistance resistance is smaller, only 100 Europe, its string
Concatenated with atomizing piece 2 in major loop, the operating current of atomizing piece 2 can be changed into voltage signal (atomizing piece operating current signal).
The signal filters high frequency through the first electric capacity (0.1uF), then carries out partial pressure by first resistor (4.7K) and second resistance (100K)
The PO2 pin of main control singlechip 5 are supplied to afterwards.
Main control singlechip 5 is preferably QA8F12048N3 single-chip microcomputers in the utility model（Hereinafter referred to as single-chip microcomputer）, single-chip microcomputer
Controlled output pin connect the grid of FET, the signal input pin of single-chip microcomputer accesses atomizing piece operating current signal.Master control
Main two act as single-chip microcomputer 5：One is that PFD drives generation 1.7M high-frequency signals, and atomizing piece 2 is driven by FET；
Two is the electric current that atomizing piece 2 is flowed through with converter accurate measurement, and atomization and burning prevention function are realized with further.
Single-chip microcomputer includes that 8 MCU kernels of RISC, timer, ROM and RAM memories, I/O drive, PFD drives, PWM
Drive, imitate IXD drivings, converter, timer, Shi Ji.
The controlled output pin (the 7th pin 12N10) of single-chip microcomputer connects the grid of the FET, when it exports 1.7M high frequencies
During signal, atomizing piece 2 is started working, and is made water fogging；The signal input pin (the 4th pin CUREENT) of single-chip microcomputer accesses atomizing piece 2
Whether operating current signal, measures operating current, so as to having water to judge.When judging anhydrous, single-chip microcomputer closing control
The output of output pin, atomizing piece is stopped, it is to avoid burn.
Atomizing piece 2 is preferably ceramic atomizing piece, by the high-frequency resonant of ceramic atomizing piece, aqueous water minor structure is beaten
Dissipate and produce the elegant water smoke of nature, compare with heating atomization mode, energy saving 90%.To be released in atomization process in addition
The anion of amplification quantity, its with air in the smog, the dust that float etc. produce electrostatic reaction, increasing indoor air humidity
Air is set to obtain a certain degree of purification simultaneously.
When main control singlechip 5 removes to drive atomizing piece 2 by being atomized piece driving circuit 3 with fixed frequency, it is atomized
Water can influence the electric current of atomizing piece as load, and electric current now is larger.
After the water loaded in product is finished, the electric current of atomizing piece 2 can be reduced, and main control singlechip 5 is electric in real time by atomizing piece 2
Stream is made comparisons with default current value, when the current value that the feedback of current detection circuit 4 is come is more than or equal to pre-set current value, master control
Single-chip microcomputer 5 continues to send high-frequency driving signal to atomization piece driving circuit 3, and atomization piece driving circuit 3 constantly drives atomizing piece 2
Work.
When the current value that the feedback of current detection circuit 4 is come is less than pre-set current value, show water in now product
Exhaust, main control singlechip 5 stops sending high-frequency driving signal to atomization piece driving circuit 3, is atomized piece driving circuit 3 and atomizing piece
2 are stopped, and thereby prevent the dry combustion method of atomizing piece 2 from damaging.
High-frequency driving signal is sent to control it to atomization piece driving circuit 3 by main control singlechip 5 in the utility model
Direct current is converted to the high-frequency drive pulse for driving atomizing piece 2 to work, electric current inspection is concatenated between atomization piece driving circuit 3 and ground
The operating current signal of atomizing piece 2 is fed back to main control singlechip 5 by slowdown monitoring circuit 4, current detection circuit 4, and main control singlechip 5 is according to this
The size of current signal controls whether to send high-frequency driving signal.Capacitance detecting mode or metal electrode detection side are not used
Formula, in the absence of metal bar polarization or problem of oxidation, makes detection more accurate, and in the absence of the risk of electric leakage.Reduce unit simultaneously
Part, makes simple structure, advantageously reduces the cost of product.
Above disclosed is only a kind of preferred embodiment of the utility model, can not define this practicality with this certainly
New interest field, one of ordinary skill in the art will appreciate that all or part of structure of above-described embodiment is realized, and according to
The equivalent variations that the utility model claim is made, still fall within the scope that utility model is covered.
Claims (10)
1. a kind of anti-dry protection circuit, it includes power circuit（1）, atomizing piece（2）, it is characterised in that it also includes atomizing piece
Drive circuit（3）, current detection circuit（4）, main control singlechip（5）, it is atomized piece driving circuit（3）It is high frequency by DC conversion
Electric current, current detection circuit（4）Detection atomizing piece（2）Operating current, be atomized piece driving circuit（3）With atomizing piece（2）Connection,
Atomization piece driving circuit（3）Current detection circuit is concatenated between ground（4）, main control singlechip（5）With power circuit（1）, atomization
Piece driving circuit（3）, current detection circuit（4）Connection.
2. anti-dry protection circuit according to claim 1, it is characterised in that atomization piece driving circuit（3）Including field-effect
Pipe, the grid connection high-frequency driving signal of FET, and the source electrode of FET is connected by the 4th resistance, FET
Source electrode connects current detection circuit, and one end of drain electrode first inductance of connection of FET, the other end connection of the first inductance connects
Connect power end, the source electrode of FET through the second capacitance connection to output interface positive pole, the negative pole ground connection of output interface.
3. anti-dry protection circuit according to claim 2, it is characterised in that current detection circuit（4）Including detection electricity
Resistance, detection resistance one end connects the 5th electric capacity, one end of the 5th resistance, the source electrode of FET, detection resistance and the 5th electric capacity
Other end ground connection, one end of the resistance of another termination the 5th of detection resistance simultaneously exports atomizing piece operating current signal, the 5th electricity
The other end ground connection of resistance.
4. anti-dry protection circuit according to claim 3, it is characterised in that main control singlechip（5）It is QA8F12048N3
Single-chip microcomputer, the controlled output pin of QA8F12048N3 single-chip microcomputers connects the grid of FET, the letter of QA8F12048N3 single-chip microcomputers
Number input pin accesses atomizing piece operating current signal.
5. anti-dry protection circuit according to claim 4, it is characterised in that QA8F12048N3 single-chip microcomputers include 8
The MCU kernels of RISC, timer, ROM and RAM memories, I/O drive, PFD drives, PWM drives, imitative IXD drives, AD conversion
Device, timer, Shi Ji.
6. anti-dry protection circuit according to claim 5, it is characterised in that atomizing piece（2）It is ceramic atomizing piece.
7. a kind of household electrical appliance, it is characterised in that it includes the anti-dry protection circuit described in claim any one of 1-6.
8. household electrical appliance according to claim 7, it is characterised in that described household electrical appliance are humidifier.
9. household electrical appliance according to claim 7, it is characterised in that described household electrical appliance are fumigating machine.
10. household electrical appliance according to claim 7, it is characterised in that described household electrical appliance are beauty instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621446677.9U CN206274367U (en) | 2016-12-27 | 2016-12-27 | Anti-dry protection circuit and use its household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621446677.9U CN206274367U (en) | 2016-12-27 | 2016-12-27 | Anti-dry protection circuit and use its household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206274367U true CN206274367U (en) | 2017-06-23 |
Family
ID=59063220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621446677.9U Expired - Fee Related CN206274367U (en) | 2016-12-27 | 2016-12-27 | Anti-dry protection circuit and use its household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206274367U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576868A (en) * | 2017-08-28 | 2018-01-12 | 珠海格力电器股份有限公司 | Vibrator working state detection method, device and circuit and humidifier |
| CN108480119A (en) * | 2018-04-13 | 2018-09-04 | 东莞市泰源电气科技有限公司 | A kind of atomizer with protection circuit |
| CN111569199A (en) * | 2020-04-24 | 2020-08-25 | 深圳麦克韦尔科技有限公司 | Dry burning prevention method and device for atomizer, atomizer and storage medium |
| CN113796714A (en) * | 2020-06-16 | 2021-12-17 | 杭州九阳小家电有限公司 | Vacuum cup and control method thereof |
| CN114433406A (en) * | 2020-11-02 | 2022-05-06 | 广州奕至家居科技有限公司 | Atomization sheet working circuit, atomizer and atomization control method |
| CN114570550A (en) * | 2020-11-30 | 2022-06-03 | 深圳麦克韦尔科技有限公司 | Atomization device and method of use thereof |
| CN114877507A (en) * | 2022-05-18 | 2022-08-09 | 深圳市太美亚电子科技有限公司 | Atomization piece dry-burning protection circuit, humidification device and dry-burning protection method |
-
2016
- 2016-12-27 CN CN201621446677.9U patent/CN206274367U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576868A (en) * | 2017-08-28 | 2018-01-12 | 珠海格力电器股份有限公司 | Vibrator working state detection method, device and circuit and humidifier |
| CN108480119A (en) * | 2018-04-13 | 2018-09-04 | 东莞市泰源电气科技有限公司 | A kind of atomizer with protection circuit |
| CN111569199A (en) * | 2020-04-24 | 2020-08-25 | 深圳麦克韦尔科技有限公司 | Dry burning prevention method and device for atomizer, atomizer and storage medium |
| CN111569199B (en) * | 2020-04-24 | 2023-09-12 | 深圳麦克韦尔科技有限公司 | Dry burning prevention method and device for atomizer, atomizer and storage medium |
| CN113796714A (en) * | 2020-06-16 | 2021-12-17 | 杭州九阳小家电有限公司 | Vacuum cup and control method thereof |
| CN114433406A (en) * | 2020-11-02 | 2022-05-06 | 广州奕至家居科技有限公司 | Atomization sheet working circuit, atomizer and atomization control method |
| CN114570550A (en) * | 2020-11-30 | 2022-06-03 | 深圳麦克韦尔科技有限公司 | Atomization device and method of use thereof |
| CN114570550B (en) * | 2020-11-30 | 2023-09-29 | 深圳麦克韦尔科技有限公司 | Atomizing device and method of use thereof |
| CN114877507A (en) * | 2022-05-18 | 2022-08-09 | 深圳市太美亚电子科技有限公司 | Atomization piece dry-burning protection circuit, humidification device and dry-burning protection method |
| CN114877507B (en) * | 2022-05-18 | 2024-05-10 | 深圳市太美亚电子科技有限公司 | Atomizing sheet dry-combustion protection circuit, humidifying device and dry-combustion protection method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170623 Termination date: 20181227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |