CN104283181A - Protective circuit of ultrasonic humidifier and ultrasonic humidifier - Google Patents
Protective circuit of ultrasonic humidifier and ultrasonic humidifier Download PDFInfo
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- CN104283181A CN104283181A CN201310292197.6A CN201310292197A CN104283181A CN 104283181 A CN104283181 A CN 104283181A CN 201310292197 A CN201310292197 A CN 201310292197A CN 104283181 A CN104283181 A CN 104283181A
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- circuit
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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
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- Air Humidification (AREA)
Abstract
The invention provides a protective circuit of an ultrasonic humidifier. The protective circuit comprises an overheating detection circuit, an overcurrent detection circuit and a latching circuit. The latching circuit is connected with the base electrode of a mist amount adjusting audion Q2 of the ultrasonic humidifier and connected with the overheating detection circuit and the overcurrent detection circuit; the overheating detection circuit detects the temperature of an audion Q3 or cooling fins of the audion Q3 in an ultrasonic oscillation circuit, the overcurrent detection circuit is used for detecting the current of the oscillation circuit of the ultrasonic humidifier, and the latching circuit is used for controlling the audion Q2 to be turned off; when the temperature of the audion Q3 or the cooling fins of the audion Q3 reaches a set temperature value, or the current of the oscillation circuit reaches a set current value, the latching circuit controls the audion Q2 to be turned off. The invention further relates to an ultrasonic humidifier using the protective circuit. According to the protective circuit of the ultrasonic humidifier and the ultrasonic humidifier, overheating and overcurrent dual protection is integrated, the response speed and reliability are high, and cost is low.
Description
Technical field
The present invention relates to household appliance technical field, particularly relate to a kind of protective circuit and the ultrasonic humidifier with the ultrasonic humidifier of overheated, overcurrent self-locking duplicate protection.
Background technology
Nowadays, ultrasonic humidifier uses extensively, quite likes by consumer, but due to itself operation principle and add other various human factors such as moisture is large, cause device heating serious, lack of water detects inefficacy thus causes dry combustion method.Current humidifier is on the market all utilize water or Air flow substantially; Use the safeguard measures such as disposable or recoverable temperature protection device (as disposable fuse-link) to prevent the situation of the few or dry combustion method of water; this method is single, response speed is slow and unreliable; when this safeguard measure lost efficacy; dry combustion method will cause whole damage of product to be scrapped; even can cause danger time serious, threat to life property safety.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of protective circuit and ultrasonic humidifier of ultrasonic humidifier, integrating overheated, overcurrent duplicate protection, there is response speed and higher reliability faster.For achieving the above object, technical scheme of the present invention is as follows:
A protective circuit for ultrasonic humidifier, comprises overheating detection circuit, over-current detection circuit and latching circuit;
Described latching circuit connects the base stage of the mist amount adjustment triode Q2 of ultrasonic humidifier, and described latching circuit is also connected with described overheating detection circuit and over-current detection circuit respectively;
Described overheating detection circuit, for detecting the temperature of triode Q3 in ultrasonic humidifier in supersonic oscillations circuit or its fin;
Described over-current detection circuit, for detecting the electric current of the supersonic oscillations circuit of ultrasonic humidifier;
Described latching circuit, cuts out for controlling described triode Q2;
When the electric current that the temperature of described triode Q3 or its fin reaches set temperature value or described supersonic oscillations circuit reaches setting current value, described latching circuit controls described triode Q2 and cuts out.
More preferably, described overheating detection circuit comprises resistance R8 and thermistor RT1;
One end of described resistance R8 connects power supply, other end series thermal-sensitive resistance RT1 ground connection.
More preferably, described over-current detection circuit comprises comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and diode D6;
Described comparator U1 comprises the 4th to octal;
The 4th pin ground connection of described comparator U1, the described 4th pin described resistance R17 that also connects connects described supersonic oscillations circuit, for the electric current of described supersonic oscillations circuit of sampling;
5th pin of the described comparator U1 described resistance R9 that connects connects described power supply, described resistance R13 ground connection of connecting;
6th pin of the described comparator U1 described resistance R14 that connects connects described oscillating circuit, described resistance R17 samples the electric current of described supersonic oscillations circuit, be connected to the 6th pin of described comparator U1 after being converted into magnitude of voltage through described resistance R14, the benchmark comparing voltage value that dividing potential drop of connecting with by described resistance R9, R13 provides compares;
7th pin of described comparator U1 connects the negative electrode of diode D6, and the anode of diode D6 is connected to the common port of described resistance R8 and thermistor RT1; The octal of described comparator U1 connects described power supply.
More preferably, described latching circuit comprises controllable silicon Q4, resistance R7 and diode D5;
The first end of the described controllable silicon Q4 described resistance R7 that connects connects described power supply, and described first end also connects the negative electrode of described diode D5, and the anode of diode D5 connects the base stage of described triode Q2, the second end ground connection of described controllable silicon Q4; The trigger end contact resistance R8 of controllable silicon Q4 and the common port of thermistor RT1.
More preferably, described latching circuit also comprises resistance R12 and electric capacity C8, and the trigger end of the described controllable silicon Q4 described resistance R12 that connects is connected to the common port of resistance R8 and thermistor RT1;
The trigger end of described controllable silicon Q4 is connected described electric capacity C8 ground connection.
More preferably, described over-current detection circuit also comprises electric capacity C6 and electric capacity C7;
5th pin of described comparator U1 is connected described electric capacity C6 ground connection;
6th pin of described comparator U1 is connected described electric capacity C7 ground connection.
More preferably, described controllable silicon Q4 be unidirectional transistor, bidirectional transistor or other there is the transistor of auto-lock function.
Also relate to a kind of ultrasonic humidifier, comprise the protective circuit of the ultrasonic humidifier of above-mentioned arbitrary technical characteristic.
The invention has the beneficial effects as follows:
The protective circuit of ultrasonic humidifier of the present invention and ultrasonic humidifier, integrate overheated, overcurrent duplicate protection, has response speed, higher reliability and lower cost faster.
Accompanying drawing explanation
Fig. 1 is the protective circuit block diagram of ultrasonic humidifier of the present invention;
Fig. 2 is the circuit diagram of protective circuit one embodiment of ultrasonic humidifier of the present invention;
Fig. 3 is the circuit diagram of ultrasonic humidifier one embodiment of the present invention;
Fig. 4 is the pin schematic diagram of comparator U1.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the protective circuit of ultrasonic humidifier of the present invention and ultrasonic humidifier are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one
Referring to figs. 1 through Fig. 3, protective circuit one embodiment of ultrasonic humidifier of the present invention comprises overheating detection circuit 1, over-current detection circuit 2 and latching circuit 3, overheating detection circuit 1 detects the temperature of triode Q3 in ultrasonic humidifier in supersonic oscillations circuit 4 or its fin, over-current detection circuit 2 is for detecting the electric current of the supersonic oscillations circuit 4 of ultrasonic humidifier, and latching circuit 3 cuts out for controlling triode Q2; Wherein, the supersonic oscillations circuit in Fig. 2 is not completely shown, and it is identical with the supersonic oscillations circuit in Fig. 3.
Latching circuit 3 connects the base stage that mist amount regulates triode Q2, and latching circuit 3 is also connected with overheating detection circuit 1 and over-current detection circuit 2 respectively;
When the electric current that the temperature of triode Q3 or its fin reaches set temperature value or supersonic oscillations circuit 4 reaches setting current value, latching circuit 3 controls triode Q2 and cuts out.
More preferably, as a kind of embodiment, overheating detection circuit 1 comprises resistance R8 and thermistor RT1, and one end of resistance R8 connects power supply+5V, other end series thermal-sensitive resistance RT1 ground connection.
Over-current detection circuit 2 comprises comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and diode D6;
As shown in Figure 4, comparator U1 comprises the 4th to octal;
4th pin (4 pin) ground connection of comparator U1, the 4th pin also series resistance R17 connects supersonic oscillations circuit 4, for the electric current of supersonic oscillations circuit 4 of sampling;
5th pin (5 pin) the series resistance R9 of comparator U1 connects power supply+5V, series resistance R13 ground connection;
6th pin (6 pin) the series resistance R14 of comparator U1 connects supersonic oscillations circuit 4, the electric current of resistance R17 sampling supersonic oscillations circuit, be connected to the 6th pin (6 pin) of comparator U1 after being converted into magnitude of voltage through resistance R14, the benchmark comparing voltage value that dividing potential drop of connecting with by resistance R9, R13 provides compares;
7th pin (7 pin) of comparator U1 connects the negative electrode of diode D6, and the anode of diode D6 is connected to the common port of resistance R8 and thermistor RT1; The octal (8 pin) of comparator U1 connects power supply+5V.
Latching circuit 3 comprises controllable silicon Q4, resistance R7 and diode D5, the first end series resistance R7 of controllable silicon Q4 connects power supply+5V, first end also connects the negative electrode of diode D5, the base stage of the anode connecting triode Q2 of diode D5, the second end ground connection of controllable silicon Q4, the trigger end contact resistance R8 of controllable silicon Q4 and the common port of thermistor RT1.Controllable silicon Q4 is unidirectional transistor, bidirectional transistor or other there is the transistor of auto-lock function.
More preferably, as a kind of embodiment, latching circuit 3 also comprises resistance R12 and electric capacity C8, and the trigger end series resistance R12 of controllable silicon Q4 is connected to the common port of resistance R8 and thermistor RT1, the trigger end series capacitance C8 ground connection of controllable silicon Q4.
More preferably, as a kind of embodiment, over-current detection circuit 1 also comprises the 5th pin (5 pin) the series capacitance C6 ground connection of electric capacity C6 for filtering and electric capacity C7, comparator U1, the 6th pin (6 pin) the series capacitance C7 ground connection of comparator U1.
When temperature is too high, voltage on thermistor RT1 reduces, and during the low trigger voltage to controllable silicon Q4, controllable silicon Q4 is triggered conducting, and diode D5 also conducting, drags down the base stage of triode Q2, turns off mist amount and exports; Also or, when the electric current of supersonic oscillations circuit is excessive, the 7 pin output low levels of U1, D6 conducting, drags down the trigger electrode of controllable silicon Q4, makes controllable silicon Q4 conducting, turn off atomization export, quit work.Large than normal operation of the electric current of supersonic oscillations circuit part when no-water dry combustion, when temperature or electric current reach set point, machine enters self-lock protection state, quits work.Controllable silicon Q4 is once after the conducting that is triggered, and just it doesn't matter with extraneous triggering signal, namely forms oneself's locking, unless removed power supply and the temperature of triode Q3 or its fin is reduced to below settings could again normally work.
Embodiment two
A kind of ultrasonic humidifier, its protective circuit as shown in Figure 3, comprises fan drive circuit, indicator light circuit, overheated overcurrent self-locking protective circuit, mist amount regulating circuit and supersonic oscillations circuit.
Fan drive circuit comprises resistance R6 and NPN triode Q5, when tongue tube SIP2 closes, and fan work, during lack of water, tongue tube SIP2 disconnects, and fan quits work;
Indicator light circuit comprises dual-colored LED lamp D1, D2, NPN triode Q1, diode D3, resistance R1, resistance R2 and resistance R4, the collector electrode of triode Q1 is connected with the red control end of dual-colored LED lamp D1, D2, and the base stage of Q1 connects the anode of diode D3 and is connected to one end of resistance R4 of tongue tube SIP2;
Mist amount regulating circuit is general voltage follower, is made up of NPN triode Q2, and regulate adjustable resistance SIP1 resistance can regulate Q2 base voltage, the voltage of Q2 emitter also changes thereupon; Supersonic oscillations circuit is general Colpitts oscillation circuit.
Protective circuit specific works process is as follows:
During normal work, the 7th pin (7 pin) of the comparator U1 in protective circuit exports high level, and diode D6 ends, and voltage on thermistor RT1 is higher than the trigger voltage of controllable silicon Q4, and controllable silicon Q4 is in off state; The negative electrode of diode D3 and D5 is high level, both cut-offs, and mist amount regulates unaffected, the triode Q1 conducting in indicator light circuit, and red LED lamp D2 ends, and indicator light display is green.During water tank lacks water, tongue tube SIP1 disconnects, the green LED lamp D1 cut-off in indicator light circuit 2, and red LED lamp D2 conducting, indicator light display is red.
When atomizing piece B1 dry combustion method; or temperature is too high, during higher than design temperature, self-locking protective circuit action; controllable silicon Q4 conducting self-locking; diode D3 and diode D5 conducting, the base stage of triode Q2 is dragged down, and mist amount exports and turns off; indicator light circuit triode Q1 cut-off simultaneously; red LED lamp D2 conducting, is shown as yellow together with green LED lamp, instruction operation irregularity.
The protective circuit of the ultrasonic humidifier in above-described embodiment and ultrasonic humidifier, integrate overheated, overcurrent duplicate protection, has response speed, higher reliability and lower cost faster.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a protective circuit for ultrasonic humidifier, is characterized in that:
Comprise overheating detection circuit, over-current detection circuit and latching circuit;
Described latching circuit connects the base stage of the mist amount adjustment triode Q2 of ultrasonic humidifier, and described latching circuit is also connected with described overheating detection circuit and over-current detection circuit respectively;
Described overheating detection circuit, for detecting in ultrasonic humidifier for controlling the temperature of triode Q3 in supersonic oscillations circuit or its fin;
Described over-current detection circuit, for detecting the electric current of the supersonic oscillations circuit of ultrasonic humidifier;
Described latching circuit, cuts out for controlling described triode Q2;
When the electric current that the temperature of described triode Q3 or its fin reaches set temperature value or described supersonic oscillations circuit reaches setting current value, described latching circuit controls described triode Q2 and cuts out.
2. the protective circuit of ultrasonic humidifier according to claim 1, is characterized in that:
Described overheating detection circuit comprises resistance R8 and thermistor RT1;
One end of described resistance R8 connects power supply, other end series thermal-sensitive resistance RT1 ground connection.
3. the protective circuit of ultrasonic humidifier according to claim 2, is characterized in that:
Described over-current detection circuit comprises comparator U1, resistance R9, resistance R13, resistance R14, resistance R17 and diode D6;
Described comparator U1 comprises the 4th to octal;
The 4th pin ground connection of described comparator U1, the described 4th pin described resistance R17 that also connects connects described supersonic oscillations circuit, for the electric current of described supersonic oscillations circuit of sampling;
5th pin of the described comparator U1 described resistance R9 that connects connects described power supply, described resistance R13 ground connection of connecting;
6th pin of the described comparator U1 described resistance R14 that connects connects described supersonic oscillations circuit, described resistance R17 samples the electric current of described supersonic oscillations circuit, be connected to the 6th pin of described comparator U1 after being converted into magnitude of voltage through described resistance R14, the benchmark comparing voltage value that dividing potential drop of connecting with by described resistance R9, R13 provides compares;
7th pin of described comparator U1 connects the negative electrode of diode D6, and the anode of diode D6 is connected to the common port of described resistance R8 and thermistor RT1; The octal of described comparator U1 connects described power supply.
4. the protective circuit of ultrasonic humidifier according to claim 3, is characterized in that:
Described latching circuit comprises controllable silicon Q4, resistance R7 and diode D5;
The first end of the described controllable silicon Q4 described resistance R7 that connects connects described power supply, and described first end also connects the negative electrode of described diode D5, and the anode of diode D5 connects the base stage of described triode Q2, the second end ground connection of described controllable silicon Q4; The trigger end contact resistance R8 of controllable silicon Q4 and the common port of thermistor RT1.
5. the protective circuit of ultrasonic humidifier according to claim 4, is characterized in that:
Described latching circuit also comprises resistance R12 and electric capacity C8, and the trigger end of the described controllable silicon Q4 described resistance R12 that connects is connected to the common port of resistance R8 and thermistor RT1;
The trigger end of described controllable silicon Q4 is connected described electric capacity C8 ground connection.
6. the protective circuit of ultrasonic humidifier according to claim 5, is characterized in that:
Described over-current detection circuit also comprises electric capacity C6 and electric capacity C7;
5th pin of described comparator U1 is connected described electric capacity C6 ground connection;
6th pin of described comparator U1 is connected described electric capacity C7 ground connection.
7. the protective circuit of the ultrasonic humidifier according to any one of claim 4-6, is characterized in that:
Described controllable silicon Q4 is unidirectional transistor, bidirectional transistor or other there is the transistor of auto-lock function.
8. a ultrasonic humidifier, is characterized in that:
Comprise the protective circuit of the ultrasonic humidifier as described in any one of claim 1 to 7.
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 true CN104283181A (en) | 2015-01-14 |
| CN104283181B CN104283181B (en) | 2018-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (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 |
| CN105226608A (en) * | 2015-10-30 | 2016-01-06 | 深圳市共进电子股份有限公司 | A kind of overheating protection circuit and Set Top Box |
| CN105610126A (en) * | 2015-12-24 | 2016-05-25 | 深圳市共进电子股份有限公司 | Overtemperature protection circuit of network equipment |
| CN113983636A (en) * | 2021-10-09 | 2022-01-28 | 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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Cited By (7)
| 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 |
| CN105226608A (en) * | 2015-10-30 | 2016-01-06 | 深圳市共进电子股份有限公司 | A kind of overheating protection circuit and Set Top Box |
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| CN113983636A (en) * | 2021-10-09 | 2022-01-28 | 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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| CN104283181B (en) | 2018-07-10 |
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