CN104283181B - The protection circuit and ultrasonic humidifier of ultrasonic humidifier - Google Patents
The protection circuit and ultrasonic humidifier of ultrasonic humidifier Download PDFInfo
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- CN104283181B CN104283181B CN201310292197.6A CN201310292197A CN104283181B CN 104283181 B CN104283181 B CN 104283181B CN 201310292197 A CN201310292197 A CN 201310292197A CN 104283181 B CN104283181 B CN 104283181B
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- ultrasonic humidifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention provides a kind of protection circuit of ultrasonic humidifier; including overheating detection circuit, over-current detection circuit and latching circuit; the mist amount of latching circuit connection ultrasonic humidifier adjusts the base stage of triode Q2, and latching circuit is also connect with overheating detection circuit and over-current detection circuit respectively；The temperature of triode Q3 or its cooling fin in overheating detection circuit detection supersonic oscillations circuit, over-current detection circuit are used to detect the electric current of the oscillating circuit of ultrasonic humidifier, and latching circuit is used to that triode Q2 to be controlled to close；When the electric current that the temperature of triode Q3 or its cooling fin reaches set temperature value or oscillating circuit reaches setting electric current value, latching circuit control triode Q2 is closed.Further relate to a kind of ultrasonic humidifier using above-mentioned protection circuit.The protection circuit and ultrasonic humidifier of the ultrasonic humidifier of the present invention, integrate overheat, overcurrent duplicate protection, have faster response speed, higher reliability and relatively low cost.
Description
Technical field
The present invention relates to household appliance technical field more particularly to a kind of ultrasonic waves with overheat, overcurrent self-locking duplicate protection
The protection circuit and ultrasonic humidifier of humidifier.
Background technology
Nowadays, ultrasonic humidifier is quite liked, but due to itself operation principle and humidification using extensively by consumer
Amount waits greatly other various human factors, causes device heating serious, and water shortage detection failure is so as to cause dry combustion method.At present on the market
Humidifier is essentially all to utilize water or air cooling；Use disposable or recoverable temperature protection device（As once
Property fuse-link）Etc. safeguard measures water is few or the situation of dry combustion method to prevent, this method is single, response speed slowly and not
Reliably, when this safeguard measure fails, dry combustion method will cause entire damage of product to be scrapped, and can even cause danger when serious, danger
And the security of the lives and property.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of protection circuit of ultrasonic humidifier and ultrasonic wave adds
Wet device integrates overheat, overcurrent duplicate protection, has faster response speed and higher reliability.To realize above-mentioned mesh
, technical scheme is as follows：
The protection circuit of a kind of ultrasonic humidifier, including overheating detection circuit, over-current detection circuit and latching circuit；
The mist amount of the latching circuit connection ultrasonic humidifier adjusts the base stage of triode Q2, and the latching circuit also divides
It is not connect with the overheating detection circuit and over-current detection circuit；
The overheating detection circuit, for detect triode Q3 in ultrasonic humidifier in supersonic oscillations circuit or
The temperature of its cooling fin；
The over-current detection circuit, for detecting the electric current of the supersonic oscillations circuit of ultrasonic humidifier；
The latching circuit, for the triode Q2 to be controlled to close；
The temperature of the triode Q3 or its cooling fin reaches the electricity of set temperature value or the supersonic oscillations circuit
When stream reaches setting electric current value, the latching circuit controls the triode Q2 to close.
More preferably, the overheating detection circuit includes resistance R8 and thermistor RT1；
One end connection power supply of the resistance R8, other end series thermal-sensitive resistance RT1 ground connection.
More preferably, the over-current detection circuit include comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and
Diode D6；
The comparator U1 includes the 4th to octal；
The 4th foot ground connection of the comparator U1, the 4th foot resistance R17 connections ultrasonic wave of also connecting shake
Circuit is swung, for sampling the electric current of the supersonic oscillations circuit；
The 5th foot series connection resistance R9 connections power supply of the comparator U1, the resistance R13 ground connection of connecting；
The 6th foot series connection resistance R14 connections oscillating circuit of the comparator U1, the resistance R17 sample institute
The electric current of supersonic oscillations circuit is stated, the 6th of the comparator U1 is connected to by the resistance R14 after being converted into voltage value
Foot, the benchmark comparing voltage value for dividing and providing is compared with being connected by described resistance R9, R13；
The cathode of the 7th foot connection diode D6 of the comparator U1, the anode of diode D6 are connected to the resistance R8
With the common end of thermistor RT1；The octal of the comparator U1 connects the power supply.
More preferably, the latching circuit includes silicon-controlled Q4, resistance R7 and diode D5；
The first end series connection resistance R7 connections power supply of the silicon-controlled Q4, the first end are also connected with described two
The cathode of pole pipe D5, the anode of diode D5 connect the base stage of the triode Q2, the second end ground connection of the silicon-controlled Q4；It can
Control the common end of the triggering end connection resistance R8 and thermistor RT1 of silicon Q4.
More preferably, the latching circuit is further included described in the triggering end series connection of resistance R12 and capacitance C8, the silicon-controlled Q4
Resistance R12 is connected to the common end of resistance R8 and thermistor RT1；
The triggering end series connection capacitance C8 ground connection of the silicon-controlled Q4.
More preferably, the over-current detection circuit further includes capacitance C6 and capacitance C7；
The 5th foot series connection capacitance C6 ground connection of the comparator U1；
The 6th foot series connection capacitance C7 ground connection of the comparator U1.
More preferably, the silicon-controlled Q4 is unidirectional transistor, bidirectional transistor or other transistors with auto-lock function.
A kind of ultrasonic humidifier is further related to, the protection circuit of the ultrasonic humidifier including any of the above-described technical characteristic.
The beneficial effects of the invention are as follows：
The protection circuit and ultrasonic humidifier of the ultrasonic humidifier of the present invention, collect overheat, overcurrent duplicate protection in one
Body has faster response speed, higher reliability and relatively low cost.
Description of the drawings
Fig. 1 is the protection circuit block diagram of the ultrasonic humidifier of the present invention；
Fig. 2 is the circuit diagram of protection one embodiment of circuit of the ultrasonic humidifier of the present invention；
Fig. 3 is the circuit diagram of one embodiment of ultrasonic humidifier of the present invention；
Fig. 4 is the pin schematic diagram of comparator U1.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to the accompanying drawings and embodiments
The protection circuit and ultrasonic humidifier of the ultrasonic humidifier of the present invention are further elaborated.It should be appreciated that herein
Described specific embodiment only to explain the present invention, is not intended to limit the present invention.
Embodiment one
Referring to figs. 1 to Fig. 3, one embodiment of protection circuit of ultrasonic humidifier of the invention include overheating detection circuit 1,
Over-current detection circuit 2 and latching circuit 3, overheating detection circuit 1 detect three in supersonic oscillations circuit 4 in ultrasonic humidifier
The temperature of pole pipe Q3 or its cooling fin, over-current detection circuit 2 are used to detect the supersonic oscillations circuit 4 of ultrasonic humidifier
Electric current, latching circuit 3 are used to that triode Q2 to be controlled to close；Wherein, the supersonic oscillations circuit in Fig. 2 is not completely shown, with
Supersonic oscillations circuit in Fig. 3 is identical.
Latching circuit 3 connects the base stage that mist amount adjusts triode Q2, latching circuit 3 also respectively with overheating detection circuit 1 and
Over-current detection circuit 2 connects；
The electric current that the temperature of triode Q3 or its cooling fin reaches set temperature value or supersonic oscillations circuit 4 reaches and sets
During constant current value, latching circuit 3 controls triode Q2 to close.
More preferably, as a kind of embodiment, overheating detection circuit 1 includes resistance R8 and thermistor RT1, resistance R8
One end connection power supply+5V, the other end series thermal-sensitive resistance RT1 ground connection.
Over-current detection circuit 2 includes comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and diode D6；
As shown in figure 4, comparator U1 includes the 4th to octal；
The 4th foot of comparator U1（4 feet）Ground connection, the 4th foot also series resistance R17 connection supersonic oscillations circuit 4 are used for
Sample the electric current of supersonic oscillations circuit 4；
The 5th foot of comparator U1（5 feet）Series resistance R9 connections power supply+5V, series resistance R13 ground connection；
The 6th foot of comparator U1（6 feet）Series resistance R14 connection supersonic oscillations circuit 4, resistance R17 sampling ultrasonic waves
The electric current of oscillating circuit is converted into the 6th foot for being connected to comparator U1 after voltage value by resistance R14（6 feet）, and by resistance
The benchmark comparing voltage value that R9, R13 series connection partial pressure provide is compared；
The 7th foot of comparator U1（7 feet）Connect the cathode of diode D6, the anode of diode D6 be connected to resistance R8 and
The common end of thermistor RT1；The octal of comparator U1（8 feet）Connect power supply+5V.
Latching circuit 3 includes the first end series resistance R7 connections of silicon-controlled Q4, resistance R7 and diode D5, silicon-controlled Q4
Power supply+5V, first end are also connected with the cathode of diode D5, the base stage of the anode connecting triode Q2 of diode D5, silicon-controlled Q4
Second end ground connection, silicon-controlled Q4 triggering end connection resistance R8 and thermistor RT1 common end.Silicon-controlled Q4 is unidirectional brilliant
Body pipe, bidirectional transistor or other transistors with auto-lock function.
More preferably, as a kind of embodiment, latching circuit 3 further includes touching for resistance R12 and capacitance C8, silicon-controlled Q4
Originator series resistance R12 is connected to the common end of resistance R8 and thermistor RT1, and the triggering end series capacitance C8 of silicon-controlled Q4 connects
Ground.
More preferably, as a kind of embodiment, over-current detection circuit 1 further includes the capacitance C6 and capacitance for filtering
The 5th foot of C7, comparator U1（5 feet）Series capacitance C6 is grounded, the 6th foot of comparator U1（6 feet）Series capacitance C7 is grounded.
When the temperature is excessively high, voltage on thermistor RT1 reduces, as low as silicon-controlled Q4 trigger voltage when, silicon-controlled Q4
Be triggered conducting, and diode D5 is also switched on, and the base stage of triode Q2 is dragged down, the amount output of shutdown mist；Also or, when ultrasonic wave shakes
Swing circuit electric current it is excessive when, U1 7 feet output low level, D6 conducting, the trigger electrode of silicon-controlled Q4 is dragged down, makes silicon-controlled Q4
Conducting, shutdown atomization output, is stopped.The electric current of supersonic oscillations circuit part is than normal work when no-water dry combustion
When it is big, when temperature or electric current reach setting value, machine enters self-lock protection state, is stopped.Silicon-controlled Q4 mono-
Denier is triggered after conducting, just not related with extraneous trigger signal, that is, self locking is formed, unless removing power supply and three
The temperature of pole pipe Q3 or its cooling fin is reduced to below setting value and could work normally again.
Embodiment two
A kind of ultrasonic humidifier, protection circuit is as shown in figure 3, including fan drive circuit, indicator light circuit, overheat
Overcurrent self-locking protection circuit, mist amount adjust circuit and supersonic oscillations circuit.
Fan drive circuit includes resistance R6 and NPN triode Q5, when tongue tube SIP2 is closed, fan work, during water shortage
Tongue tube SIP2 is disconnected, and fan is stopped；
Indicator light circuit includes dual-colored LED lamp D1, D2, NPN triode Q1, diode D3, resistance R1, resistance R2 and resistance
The collector of R4, triode Q1 are connect with the red control terminal of dual-colored LED lamp D1, D2, the sun of the base stage connection diode D3 of Q1
Pole and be connected to tongue tube SIP2 resistance R4 one end；
It is general voltage follower that mist amount, which adjusts circuit, is made of NPN triode Q2, adjusts adjustable resistance SIP1 resistance values
Q2 base voltages can be adjusted, the voltage of Q2 emitters also changes therewith；Supersonic oscillations circuit is general capacitance three-point type
Oscillating circuit.
Protect circuit specific work process as follows：
During normal work, the 7th foot of the comparator U1 in circuit is protected（7 feet）High level is exported, diode D6 ends,
And the voltage on thermistor RT1 is higher than the trigger voltage of silicon-controlled Q4, silicon-controlled Q4 is off state；Diode D3 and D5
Cathode be high level, the two cut-off, mist amount adjusts unaffected, the triode Q1 conductings in indicator light circuit, red LED lamp
D2 ends, indicator light display green.During water tank lacks water, tongue tube SIP1 is disconnected, and the green LED lamp D1 in indicator light circuit 2 is cut
Only, red LED lamp D2 is connected, and indicator light is displayed in red.
When atomizing piece B1 dry combustion methods or temperature are excessively high, during higher than set temperature, self-locking protective circuit action, silicon-controlled Q4
Self-locking is connected, diode D3 and diode D5 conductings, the base stage of triode Q2 are pulled low, the output shutdown of mist amount, while indicator light
Circuit triode Q1 ends, and red LED lamp D2 conductings are shown as yellow together with green LED lamp, indicate operation irregularity.
The protection circuit and ultrasonic humidifier of ultrasonic humidifier in above-described embodiment, collection overheat, the dual guarantor of overcurrent
It protects in one, there is faster response speed, higher reliability and relatively low cost.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. a kind of protection circuit of ultrasonic humidifier, it is characterised in that：
Including overheating detection circuit, over-current detection circuit and latching circuit；
The mist amount of latching circuit connection ultrasonic humidifier adjusts the base stage of triode Q2, the latching circuit also respectively with
The overheating detection circuit is connected with over-current detection circuit, and the latching circuit includes silicon-controlled Q4；
The overheating detection circuit is used to control the triode Q3 in supersonic oscillations circuit in ultrasonic humidifier for detecting
Or the temperature of its cooling fin；
The overheating detection circuit includes resistance R8 and thermistor RT1；
One end connection power supply of the resistance R8, other end series thermal-sensitive resistance RT1 ground connection；
The over-current detection circuit, for detecting the electric current of the supersonic oscillations circuit of ultrasonic humidifier, the over-current detection
Circuit is used for when the electric current of supersonic oscillations circuit is excessive, and silicon-controlled Q4 is connected, and shutdown atomization output is stopped；
The over-current detection circuit includes comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and diode D6；
The comparator U1 includes the 4th to octal；
The 4th foot ground connection of the comparator U1, the 4th foot resistance R17 connections supersonic oscillations of also connecting are electric
Road, for sampling the electric current of the supersonic oscillations circuit；
The 5th foot series connection resistance R9 connections power supply of the comparator U1, the resistance R13 ground connection of connecting；
The 6th foot series connection resistance R14 connections supersonic oscillations circuit of the comparator U1, the resistance R17 samplings
The electric current of the supersonic oscillations circuit is connected to the of the comparator U1 by the resistance R14 after being converted into voltage value
Six feet, the benchmark comparing voltage value for dividing and providing is compared with being connected by described resistance R9, R13；
The cathode of the 7th foot connection diode D6 of the comparator U1, the anode of diode D6 are connected to the resistance R8 and heat
The common end of quick resistance RT1；The octal of the comparator U1 connects the power supply；
The latching circuit, for the triode Q2 to be controlled to close；
The temperature of the triode Q3 or its cooling fin reaches set temperature value or the electric current of the supersonic oscillations circuit reaches
During to setting electric current value, the latching circuit controls the triode Q2 to close；
The latching circuit further includes resistance R7, diode D5, resistance R12 and capacitance C8, wherein,
The first end series connection resistance R7 connections power supply of the silicon-controlled Q4, the first end are also connected with the diode
The cathode of D5, the anode of diode D5 connect the base stage of the triode Q2, the second end ground connection of the silicon-controlled Q4；It is silicon-controlled
The common end of the triggering end connection resistance R8 and thermistor RT1 of Q4；The triggering end series connection resistance R12 of the silicon-controlled Q4
It is connected to the common end of resistance R8 and thermistor RT1；The triggering end series connection capacitance C8 ground connection of the silicon-controlled Q4；
When the temperature is excessively high, voltage on thermistor RT1 reduces, as low as silicon-controlled Q4 trigger voltage when, silicon-controlled Q4 quilts
Triggering and conducting, diode D5 conductings, the base stage of triode Q2 is dragged down, the amount output of shutdown mist；
When the electric current of supersonic oscillations circuit is excessive, the 7th foot output low level of comparator U1, diode D6 conductings can
The trigger electrode of control silicon Q4 drags down, and silicon-controlled Q4 is connected, and shutdown atomization output is stopped.
2. the protection circuit of ultrasonic humidifier according to claim 1, it is characterised in that：
The over-current detection circuit further includes capacitance C6 and capacitance C7；
The 5th foot series connection capacitance C6 ground connection of the comparator U1；
The 6th foot series connection capacitance C7 ground connection of the comparator U1.
3. according to the protection circuit of claim 1-2 any one of them ultrasonic humidifiers, it is characterised in that：
The silicon-controlled Q4 is unidirectional transistor, bidirectional transistor or other transistors with auto-lock function.
4. a kind of ultrasonic humidifier, it is characterised in that：
Protection circuit including ultrasonic humidifier as described in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292197.6A CN104283181B (en) | 2013-07-11 | 2013-07-11 | The protection circuit and ultrasonic humidifier of ultrasonic humidifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292197.6A CN104283181B (en) | 2013-07-11 | 2013-07-11 | The protection circuit and ultrasonic humidifier of ultrasonic humidifier |
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| Publication Number | Publication Date |
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| CN104283181A CN104283181A (en) | 2015-01-14 |
| CN104283181B true CN104283181B (en) | 2018-07-10 |
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| CN201310292197.6A Active CN104283181B (en) | 2013-07-11 | 2013-07-11 | The protection circuit and ultrasonic humidifier of ultrasonic humidifier |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283182A (en) * | 2013-07-12 | 2015-01-14 | 珠海格力电器股份有限公司 | Over-current protection circuit device of electrical appliance and ultrasonic humidifier |
| CN105165563A (en) * | 2015-08-16 | 2015-12-23 | 陈钦先 | Humidifier module |
| CN105226608B (en) * | 2015-10-30 | 2018-05-11 | 深圳市共进电子股份有限公司 | A kind of overheating protection circuit and set-top box |
| CN105610126B (en) * | 2015-12-24 | 2019-04-26 | 深圳市共进电子股份有限公司 | Network equipment overheating protection circuit |
| CN113983636B (en) * | 2021-10-09 | 2022-10-21 | 珠海格力电器股份有限公司 | Water shortage protection method and device for humidifier, humidifier and storage medium |
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| CN2112220U (en) * | 1991-12-09 | 1992-08-05 | 肖相如 | Program-controlling pulse width amplitude scr accumulator charger |
| CN2148456Y (en) * | 1993-01-01 | 1993-12-01 | 武斐 | Lamp failure protector for electronic ballast of single or multiple lamps |
| CN2200247Y (en) * | 1994-06-28 | 1995-06-07 | 丁建民 | Tracking type electronic protector |
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| CN104283181A (en) | 2015-01-14 |
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