CN203367968U - Overcurrent protection circuit device of electric appliance and ultrasonic humidifier - Google Patents
Overcurrent protection circuit device of electric appliance and ultrasonic humidifier Download PDFInfo
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- CN203367968U CN203367968U CN2013204175434U CN201320417543U CN203367968U CN 203367968 U CN203367968 U CN 203367968U CN 2013204175434 U CN2013204175434 U CN 2013204175434U CN 201320417543 U CN201320417543 U CN 201320417543U CN 203367968 U CN203367968 U CN 203367968U
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- 230000010355 oscillation Effects 0.000 claims abstract description 31
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000026683 transduction Effects 0.000 description 2
- 238000010361 transduction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 utility model provides an overcurrent protection circuit arrangement and ultrasonic humidifier of electrical apparatus. The device comprises a self-locking switch circuit and a current sampling circuit; the current sampling circuit is connected to an ultrasonic oscillation circuit of the electric appliance and is used for collecting the working current of an oscillator of the ultrasonic oscillation circuit; the self-locking switch circuit is connected to the current sampling circuit and used for conducting the self-locking switch circuit and stopping the oscillation circuit when the working current of the oscillator exceeds the set current according to the working current of the oscillator collected by the current sampling circuit. The service life of the electric appliance can be prolonged, the stability of the circuit is improved, the cost is low, and the production efficiency is improved.
Description
Technical field
The utility model relates to household electrical appliance technical field, particularly a kind of circuit overcurrent protection device and ultrasonic humidifier of electrical equipment.
Background technology
Along with improving constantly of people's living standard, various electrical equipment is as also more and more extensive as the application of humidifier in people's life.Wherein ultrasonic humidifier is because its humidification is effective, be widely used and general approval, and, through development for many years, product progresses into the maturity period.
But, because electrical equipment general work electric current is larger, device heating is serious, cause overcurrent serious and damage electric elements, for example, in ultrasonic humidifier, when lack of water, cause device heating serious, thereby cause dry combustion method and damage ultrasonic humidifier.
General adopted over-current protection method is to adopt the disposable thermal fuse-link in electrical equipment at present, and it detects by thermal fuse-link, in the fusing of electrical equipment thermal fuse-link, cuts off circuit, thereby plays the effect of overcurrent protection.For example, in common ultrasonic humidifier, cause thermal fuse-link fusing during the transduction piece dry combustion method, thereby cut off the ultrasonic humidifier circuit, thus the effect of performance overcurrent protection.
But this employing thermal fuse-link carries out the method for overcurrent protection; its low-response; directly affect the useful life of electrical equipment; and after the thermal fuse-link damage; electrical equipment can't normally use, and need to change thermal fuse-link, and the replacing of the thermal fuse-link in circuit needs the professional to carry out the dismounting maintenance; affect the experience of user to product quality, cost is high.And the electrical equipment that adopts thermal fuse-link to carry out overcurrent protection, the assembling of thermal fuse-link in electrical equipment at present is all more difficult, affects production efficiency.
The utility model content
The purpose of this utility model 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 scheme that the utility model adopts is:
A kind of circuit overcurrent protection device of electrical equipment, comprise self-locking switch circuit and current sampling circuit;
Described current sampling circuit is connected on the supersonic oscillations circuit of electrical equipment, for the operating current of the oscillator that gathers described supersonic oscillations circuit;
Described self-locking switch circuit is connected on current sampling circuit, for the size that gathers the oscillator operating current according to sample circuit, controls described supersonic oscillations circuit turn-on or cut-off.
More preferably, as an embodiment, circuit overcurrent protection 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 R 2, resistance R 3, positive-negative-positive triode Q3 and NPN type triode Q4;
Described resistance R 2 is connected between resistance R 1 and NPN type triode Q1;
Described resistance R 3 one ends are connected on the series circuit of the base stage of described NPN type triode Q1 and resistance R 2, and the other end is connected to the base stage of described positive-negative-positive triode Q3 and the collector electrode of described NPN type triode Q4;
The collector electrode of described positive-negative-positive 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 R 8, described resistance R 8 one end ground connection, and the other end is connected to the supersonic oscillations circuit.
More preferably, as an embodiment, described current sampling circuit also comprises capacitor C 9 and resistance R 9, described resistance R 8 one end contact resistance R9 and supersonic oscillations circuit, the other end is connected to the collector electrode of positive-negative-positive triode Q3 of capacitor C 9 and self-locking switch circuit and the base stage of NPN type triode Q4, capacitor C 9 other end ground connection.
For realizing that the utility model purpose also provides a kind of ultrasonic humidifier, comprise the power supply control end as power supply, and the supersonic oscillations circuit that controlled by the power supply control end, also comprise the circuit overcurrent protection device of the electrical equipment of above any technical characterictic.
The beneficial effects of the utility model are:
Circuit overcurrent protection device and the ultrasonic humidifier of electrical equipment of the present utility model, wherein circuit arrangement safety, efficient; And the ultrasonic humidifier response with this circuit arrangement is fast, reliability is high, can effectively extend the useful life of transduction piece, improve the stability of ultrasonic humidifier, better user experience, and with low cost, saved thermal fuse-link, improved production efficiency.
The accompanying drawing explanation
The circuit overcurrent protection apparatus structure schematic diagram that Fig. 1 is electrical equipment of the present utility model;
The circuit overcurrent protection device one embodiment circuit diagram that Fig. 2 is the utility model electrical equipment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, circuit overcurrent protection device and ultrasonic humidifier below in conjunction with drawings and Examples to electrical equipment of the present utility model are further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment mono-:
As shown in Figure 1, 2, a kind of circuit overcurrent protection device of electrical equipment, comprise 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 the operating current of the oscillator that gathers described supersonic oscillations circuit 2;
Described self-locking switch circuit 3 is connected on current sampling circuit 4, for the size that gathers the oscillator operating current according to current sampling circuit 4, controls described supersonic oscillations circuit turn-on or cut-off.
The supersonic oscillations circuit 2 of the circuit overcurrent protection device one end connecting circuit of described electrical equipment, the power supply control end 1 of the power supply as the supersonic oscillations circuit of other end connecting circuit;
Preferably, as a kind of embodiment, described self-locking switch circuit 3 comprises resistance R 2, resistance R 3, positive-negative-positive triode Q3 and NPN type triode Q4;
Described resistance R 2 is connected between resistance R 1 and NPN type triode Q1, plays the dividing potential drop effect, and self-locking switch circuit can be worked;
Described resistance R 3 one ends are connected on the series circuit of the base stage of described NPN type triode Q1 and resistance R 2, and the other end is connected to the base stage of described positive-negative-positive triode Q3 and the collector electrode of described NPN type triode Q4.
The collector electrode of described positive-negative-positive 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 R 2 plays the dividing potential drop effect, makes positive-negative-positive triode Q3 emitter and NPN type transistor collector that potential difference be arranged, to guarantee two triode normal operations.
As a kind of embodiment, described current sampling circuit 4 comprises resistance R 8, described resistance R 8 one end ground connection, and the other end is connected to supersonic oscillations circuit 2.
More preferably, described current sampling circuit 4 also comprises capacitor C 9 and resistance R 9, described resistance R 8 one end contact resistance R9 and supersonic oscillations circuit 2, the other end is connected to the collector electrode of positive-negative-positive triode Q3 of capacitor C 9 and self-locking switch circuit and the base stage of NPN type triode Q4, capacitor C 9 other end ground connection, for filtering peak current.
In the present embodiment; sample circuit 4 hinders by crosstalk the oscillating current that R9 and capacitor C 9, resistance R 8 gather described supersonic oscillations circuit 2; thereby make self-locking switch circuit 3 can control according to the magnitude of current of current sampling circuit sampling the turn-on and turn-off of oscillating circuit; 9 pairs of collection electric currents of capacitor C carry out filtering simultaneously; reduce the peak value of electric current, thereby protect better self-lock switch 3.
When the supersonic oscillations circuit works, the oscillator operating current deficiency that current sampling circuit 4 collects is so that positive-negative-positive triode Q3, NPN type triode Q4 conducting keep the oscillating circuit operating state.
When supersonic oscillations circuit working electric current excessive, when the magnitude of current that current sampling circuit 4 collects like this is excessive, the electric current that resistance R 9 collects increases, be enough to make positive-negative-positive triode Q3, NPN type triode Q4 conducting, make the emitter of positive-negative-positive triode Q3, NPN type triode Q4 collector voltage drags down, thereby stop 2 work of supersonic oscillations circuit, latch mutually current state by two triodes, make the emitter of positive-negative-positive triode Q3, NPN type triode Q4 collector electrode is continuously low-voltage, until manual turn-off apparatus or conciliation control end are normal to oscillating circuit, thereby effectively protected the safety of circuit.
The circuit overcurrent protection device of the electrical equipment of the present embodiment; utilize current sampling circuit to gather the magnitude of current from the supersonic oscillations circuit; self-locking switch circuit is controlled the action of supersonic oscillations circuit or stops according to the magnitude of current size collected, and response is fast, and electrical equipment stability is high.
Embodiment bis-:
The present embodiment two provides a kind of ultrasonic humidifier, as shown in Figure 1, 2, comprises to the control end of ultrasonic humidifier power supply, the electric energy of control end is converted to the oscillating circuit of ultrasonic energy source.
The circuit overcurrent protection device of the electrical equipment 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 subject to the overcurrent protection of the circuit overcurrent protection device of embodiment mono-.
The circuit overcurrent protection device of the electrical equipment in the present embodiment two; there is the identical structure of circuit overcurrent protection device with embodiment mono-described electrical equipment; and carry out work with identical execution mode; therefore; in the utility model embodiment bis-, no longer be repeated in this description the course of work of the ultrasonic humidifier with this circuit overcurrent protection device.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. the circuit overcurrent protection device of an 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 the operating current of the oscillator that gathers described supersonic oscillations circuit;
Described self-locking switch circuit is connected on current sampling circuit, for the size that gathers the oscillator operating current according to current sampling circuit, controls described supersonic oscillations circuit turn-on or cut-off.
2. the circuit overcurrent protection device of electrical equipment according to claim 1, is characterized in that, circuit overcurrent protection 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, is characterized in that, described self-locking switch circuit comprises resistance R 2, resistance R 3, positive-negative-positive triode Q3 and NPN type triode Q4;
Described resistance R 2 is connected between resistance R 1 and NPN type triode Q1;
Described resistance R 3 one ends are connected on the series circuit of the base stage of described NPN type triode Q1 and resistance R 2, and the other end is connected to the base stage of described positive-negative-positive triode Q3 and the collector electrode of described NPN type triode Q4;
The collector electrode of described positive-negative-positive 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, is characterized in that, described current sampling circuit comprises resistance R 8, described resistance R 8 one end ground connection, and the other end is connected to the 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 capacitor C 9 and resistance R 9; described resistance R 8 one end contact resistance R9 and supersonic oscillations circuit; the other end is connected to the collector electrode of positive-negative-positive triode Q3 of capacitor C 9 and self-locking switch circuit and the base stage of NPN type triode Q4, capacitor C 9 other end ground connection.
6. a ultrasonic humidifier, comprise the power supply control end as power supply, and the supersonic oscillations circuit that controlled by the power supply control end, it is characterized in that, also comprises the circuit overcurrent protection device as electrical equipment as described in claim 1 to 5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204175434U CN203367968U (en) | 2013-07-12 | 2013-07-12 | Overcurrent protection circuit device of electric appliance and ultrasonic humidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204175434U CN203367968U (en) | 2013-07-12 | 2013-07-12 | Overcurrent protection circuit device of electric appliance and ultrasonic humidifier |
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| Publication Number | Publication Date |
|---|---|
| CN203367968U true CN203367968U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204175434U Expired - Fee Related CN203367968U (en) | 2013-07-12 | 2013-07-12 | Overcurrent protection circuit device of electric appliance and ultrasonic humidifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN203367968U (en) |
Cited By (2)
| 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 | Overcurrent protection circuit device of electric appliance and ultrasonic humidifier |
| CN107968379A (en) * | 2018-01-17 | 2018-04-27 | 攀枝花学院 | Solid-state direct-current current foldback circuit |
-
2013
- 2013-07-12 CN CN2013204175434U patent/CN203367968U/en not_active Expired - Fee Related
Cited By (3)
| 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 | Overcurrent protection circuit device of electric appliance and ultrasonic humidifier |
| CN107968379A (en) * | 2018-01-17 | 2018-04-27 | 攀枝花学院 | Solid-state direct-current current foldback circuit |
| CN107968379B (en) * | 2018-01-17 | 2024-05-17 | 攀枝花学院 | Solid-state direct current protection circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20210712 |