CN104283182A - Over-current protection circuit device of electrical appliance and ultrasonic humidifier - Google Patents
Over-current protection circuit device of electrical appliance and ultrasonic humidifier Download PDFInfo
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- CN104283182A CN104283182A CN201310294755.2A CN201310294755A CN104283182A CN 104283182 A CN104283182 A CN 104283182A CN 201310294755 A CN201310294755 A CN 201310294755A CN 104283182 A CN104283182 A CN 104283182A
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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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Abstract
The invention provides an over-current protection circuit device of an electrical appliance and an ultrasonic humidifier. The device comprises a self-locking switching circuit and a current sampling circuit, wherein the current sampling circuit is connected to an ultrasonic oscillation circuit of the electrical appliance and used for collecting the oscillator working current of the ultrasonic oscillation circuit, the self-locking switching circuit is connected to the current sampling circuit, the self-locking switching circuit is used according to the magnitude of the oscillator working current collected by the current sampling circuit, when the oscillator working current is beyond a set current, the self-locking switching circuit is closed, and the oscillation circuit stops working. According to the over-current protection circuit device of the electrical appliance and the ultrasonic humidifier, the service life of the electrical appliance can be prolonged, the stability of the circuits is improved, cost is low, and production efficiency is improved.
Description
Technical field
The present invention relates to household electrical appliance technical field, particularly a kind of circuit overcurrent protection device of electrical equipment and ultrasonic humidifier.
Background technology
Along with improving constantly of people's living standard, various electrical equipment is as also more and more extensive in the application of humidifier in people's life.Wherein ultrasonic humidifier is good due to its humidifying effect, be widely used and general approval, and through development for many years, product progresses into the maturity period.
Such as, but because electrical equipment general work electric current is comparatively large, device heating is serious, causes overcurrent serious and damages electric elements, in ultrasonic humidifier, when lack of water, causing device heating serious, thus cause dry combustion method and damage ultrasonic humidifier.
Over-current protection method general adopted at present is in electrical equipment, adopt disposable thermal fuse-link, and it is detected by thermal fuse-link, cuts off circuit, thus play the effect of overcurrent protection in the fusing of electrical equipment thermal fuse-link.Such as in common ultrasonic humidifier, during transduction piece dry combustion method, cause thermal fuse-link to fuse, thus cut off ultrasonic humidifier circuit, thus play the effect of overcurrent protection.
But this employing thermal fuse-link carries out the method for overcurrent protection; its low-response; the direct useful life affecting electrical equipment; and after thermal fuse-link damage; electrical equipment cannot normally use, and needs to change thermal fuse-link, and the thermal fuse-link replacing in circuit needs professional to carry out dismounting maintenance; affect the experience of user to product quality, cost is high.And adopt thermal fuse-link to carry out the electrical equipment of overcurrent protection, the assembling of current thermal fuse-link in electrical equipment is all more difficult, affects production efficiency.
Summary of the invention
The object of this invention is to provide a kind of circuit overcurrent protection device and ultrasonic humidifier of safe, efficient, with low cost, electrical equipment that stability is high.
For achieving the above object, the technical solution adopted in the present invention is:
A circuit overcurrent protection device for electrical equipment, comprises self-locking switch circuit and current sampling circuit;
Described current sampling circuit is connected on the electrical energy conversion circuit of electrical equipment, for gathering the operating current of the oscillator of described supersonic oscillations circuit;
Described self-locking switch circuit is connected on current sampling circuit, and the size for the oscillator operation electric current of the supersonic oscillations circuit according to sample circuit collection controls described supersonic oscillations circuit operation or stopping.
More preferably, as an embodiment, current foldback circuit device one end of described electrical equipment connects supersonic oscillations circuit, the power supply control end of other end connecting circuit.
More preferably, as an embodiment, described self-locking switch circuit comprises resistance R2, resistance R3, PNP type triode Q3 and NPN type triode Q4;
Described resistance R2 is connected between resistance R1 and NPN type triode Q1;
Described resistance R3 one end is connected on the base stage of described NPN type triode Q1 and the series circuit of resistance R2, and the other end is connected to the base stage of described PNP type triode Q3 and the collector electrode of described NPN type triode Q4;
The collector electrode of described PNP type triode Q3 is connected with the base stage of described NPN type triode Q4;
The grounded emitter of described NPN type triode Q4.
More preferably, as an embodiment, described current sampling circuit comprises resistance R8, and described resistance R8 one end ground connection, the other end is connected to supersonic oscillations circuit.
More preferably, as an embodiment, described current sampling circuit also comprises electric capacity C9 and resistance R9, described resistance R8 one end contact resistance R9 and supersonic oscillations circuit, the other end is connected to the collector electrode of the PNP type triode Q3 of electric capacity C9 and self-locking switch circuit and the base stage of NPN type triode Q4, electric capacity C9 other end ground connection.
A kind of ultrasonic humidifier is also provided for realizing the object of the invention.
The invention has the beneficial effects as follows:
The circuit overcurrent protection device of electrical equipment of the present invention and ultrasonic humidifier, wherein circuit arrangement is safely, efficiently; And the ultrasonic humidifier response with this circuit arrangement is fast, reliability is high, effectively can extend the useful life of transduction piece, improve the stability of ultrasonic humidifier, better user experience, and with low cost, eliminate thermal fuse-link, improve production efficiency.
Accompanying drawing explanation
Fig. 1 is the circuit overcurrent protection apparatus structure schematic diagram of electrical equipment of the present invention;
Fig. 2 is the circuit overcurrent protection device one embodiment circuit diagram of electrical equipment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the circuit overcurrent protection device of electrical equipment 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:
As shown in Figure 1, 2, a kind of circuit overcurrent protection device of electrical equipment, comprises self-locking switch circuit 3 and current sampling circuit 4;
Described current sampling circuit 4 is connected on the supersonic oscillations circuit 2 of electrical equipment, for gathering the operating current of the oscillator of described supersonic oscillations circuit 2;
Described self-locking switch circuit 3 is connected on current sampling circuit 4, controls described supersonic oscillations circuit turn-on or cut-off for the size gathering oscillator operation electric current according to current sampling circuit 4.
The supersonic oscillations circuit 2 of current foldback circuit device one end connecting circuit of described electrical equipment, the power supply control end 1 of the power supply as supersonic oscillations circuit of other end connecting circuit;
Preferably, as a kind of embodiment, described self-locking switch circuit 3 comprises resistance R2, resistance R3, PNP type triode Q3 and NPN type triode Q4;
Described resistance R2 is connected between resistance R1 and NPN type triode Q1, plays dividing potential drop effect, and self-locking switch circuit is normally worked;
Described resistance R3 one end is connected on the base stage of described NPN type triode Q1 and the series circuit of resistance R2, and the other end is connected to the base stage of described PNP type triode Q3 and the collector electrode of described NPN type triode Q4.
The collector electrode of described PNP type triode Q3 is connected with the base stage of described NPN type triode Q4.
The grounded emitter of described NPN type triode Q4.
Described resistance R2 plays dividing potential drop effect, makes PNP type triode Q3 emitter and NPN type triode collector electrode have potential difference, to ensure that two triodes normally work.
As a kind of embodiment, described current sampling circuit 4 comprises resistance R8, and described resistance R8 one end ground connection, the other end is connected to supersonic oscillations circuit 2.
More preferably, described current sampling circuit 4 also comprises electric capacity C9 and resistance R9, described resistance R8 one end contact resistance R9 and supersonic oscillations circuit 2, the other end is connected to the collector electrode of the PNP type triode Q3 of electric capacity C9 and self-locking switch circuit and the base stage of NPN type triode Q4, electric capacity C9 other end ground connection, for filtering peak current.
In the present embodiment; sample circuit 4 gathers the oscillating current of described supersonic oscillations circuit 2 by crosstalk resistance R9 and electric capacity C9, resistance R8; thus make self-locking switch circuit 3 can control the turn-on and turn-off of oscillating circuit according to the magnitude of current of current sampling circuit sampling; electric capacity C9 carries out filtering to collection electric current simultaneously; reduce the peak value of electric current, thus protect self-lock switch 3 better.
When supersonic oscillations circuit normally works, the oscillator operation undercurrent that current sampling circuit 4 collects, to make PNP type triode Q3, NPN type triode Q4 conducting, keeps oscillating circuit operating state.
When supersonic oscillations circuit working electric current is excessive, when the magnitude of current that such current sampling circuit 4 collects is excessive, the electric current that resistance R9 collects increases, be enough to make PNP type triode Q3, NPN type triode Q4 conducting, make the emitter of PNP type triode Q3, NPN type triode Q4 collector voltage drags down, thus stop supersonic oscillations circuit 2 to work, current state is latched mutually by two triodes, make the emitter of PNP type triode Q3, NPN type triode Q4 collector electrode is continuously low-voltage, until manual turn-off apparatus or reconcile control end normal to oscillating circuit, thus effectively protect the safety of circuit.
The circuit overcurrent protection device of the electrical equipment of the present embodiment; current sampling circuit is utilized to gather the magnitude of current from supersonic oscillations circuit; self-locking switch circuit controls action or the stopping of supersonic oscillations circuit according to the magnitude of current size collected, and response is fast, and electrical equipment stability is high.
Embodiment two:
The present embodiment two provides a kind of ultrasonic humidifier, as shown in Figure 1, 2, comprises the control end of powering to ultrasonic humidifier, the electric energy of control end is converted to the oscillating circuit of ultrasonic energy source.
Circuit overcurrent protection device in the present embodiment two, the electrical equipment of protection is ultrasonic humidifier.Wherein the power supply control end 1 of ultrasonic humidifier is as power supply, and supersonic oscillations circuit 2 is by the overcurrent protection of the circuit overcurrent protection device of embodiment one.
Excess current protective circuit device in the present embodiment two; there is the structure identical with circuit overcurrent protection device described in embodiment one; and carry out work with identical execution mode; therefore; in the embodiment of the present invention two, no longer repeated description has the course of work of the ultrasonic humidifier of this circuit overcurrent protection device.
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 (6)
1. a circuit overcurrent protection device for electrical equipment, is characterized in that, comprises self-locking switch circuit and current sampling circuit;
Described current sampling circuit is connected on the supersonic oscillations circuit of electrical equipment, for gathering the operating current of the oscillator of described supersonic oscillations circuit;
Described self-locking switch circuit is connected on current sampling circuit, controls described supersonic oscillations circuit turn-on or cut-off for the size gathering oscillator operation electric current according to current sampling circuit.
2. the circuit overcurrent protection device of electrical equipment according to claim 1, it is characterized in that, current foldback circuit device one end of described electrical equipment connects described supersonic oscillations circuit, the power supply control end of other end connecting circuit.
3. the circuit overcurrent protection device of electrical equipment according to claim 2, it is characterized in that, described self-locking switch circuit comprises resistance R2, resistance R3, PNP type triode Q3 and NPN type triode Q4;
Described resistance R2 is connected between resistance R1 and NPN type triode Q1;
Described resistance R3 one end is connected on the base stage of described NPN type triode Q1 and the series circuit of resistance R2, and the other end is connected to the base stage of described PNP type triode Q3 and the collector electrode of described NPN type triode Q4;
The collector electrode of described PNP type triode Q3 is connected with the base stage of described NPN type triode Q4;
The grounded emitter of described NPN type triode Q4.
4. the circuit overcurrent protection device of electrical equipment according to claim 3, it is characterized in that, described current sampling circuit comprises resistance R8, and described resistance R8 one end ground connection, the other end is connected to supersonic oscillations circuit.
5. the circuit overcurrent protection device of electrical equipment according to claim 4; it is characterized in that; described current sampling circuit also comprises electric capacity C9 and resistance R9; described resistance R8 one end contact resistance R9 and supersonic oscillations circuit; the other end is connected to the collector electrode of the PNP type triode Q3 of electric capacity C9 and self-locking switch circuit and the base stage of NPN type triode Q4, electric capacity C9 other end ground connection.
6. a ultrasonic humidifier, comprises the power supply control end as power supply, and by the supersonic oscillations circuit that power supply control end controls, it is characterized in that, also comprise the circuit overcurrent protection device of electrical equipment as described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294755.2A CN104283182A (en) | 2013-07-12 | 2013-07-12 | Over-current protection circuit device of electrical appliance and ultrasonic humidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294755.2A CN104283182A (en) | 2013-07-12 | 2013-07-12 | Over-current protection circuit device of electrical appliance and ultrasonic humidifier |
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| Publication Number | Publication Date |
|---|---|
| CN104283182A true CN104283182A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310294755.2A Pending CN104283182A (en) | 2013-07-12 | 2013-07-12 | Over-current protection circuit device of electrical appliance and ultrasonic humidifier |
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| Country | Link |
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| CN (1) | CN104283182A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454171A (en) * | 2016-11-15 | 2017-02-22 | 深圳市视维科技有限公司 | Power supply circuit of CA card of set-top-box |
| CN113983664A (en) * | 2021-10-29 | 2022-01-28 | 北京小米移动软件有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172394U (en) * | 2011-02-15 | 2012-03-21 | 刘剑 | Silicon controlled rectifier switch circuit possessing overload short circuit protection functions |
| CN203367967U (en) * | 2013-07-11 | 2013-12-25 | 珠海格力电器股份有限公司 | Protection circuit of ultrasonic humidifier and ultrasonic humidifier |
| CN203367968U (en) * | 2013-07-12 | 2013-12-25 | 珠海格力电器股份有限公司 | Electric appliance over-current protection circuit device, and ultrasonic humidifier |
| CN104283181A (en) * | 2013-07-11 | 2015-01-14 | 珠海格力电器股份有限公司 | Protective circuit of ultrasonic humidifier and ultrasonic humidifier |
-
2013
- 2013-07-12 CN CN201310294755.2A patent/CN104283182A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172394U (en) * | 2011-02-15 | 2012-03-21 | 刘剑 | Silicon controlled rectifier switch circuit possessing overload short circuit protection functions |
| CN203367967U (en) * | 2013-07-11 | 2013-12-25 | 珠海格力电器股份有限公司 | Protection circuit of ultrasonic humidifier and ultrasonic humidifier |
| CN104283181A (en) * | 2013-07-11 | 2015-01-14 | 珠海格力电器股份有限公司 | Protective circuit of ultrasonic humidifier and ultrasonic humidifier |
| CN203367968U (en) * | 2013-07-12 | 2013-12-25 | 珠海格力电器股份有限公司 | Electric appliance over-current protection circuit device, and ultrasonic humidifier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454171A (en) * | 2016-11-15 | 2017-02-22 | 深圳市视维科技有限公司 | Power supply circuit of CA card of set-top-box |
| CN113983664A (en) * | 2021-10-29 | 2022-01-28 | 北京小米移动软件有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
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Application publication date: 20150114 |
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| RJ01 | Rejection of invention patent application after publication |