CN104065027A

CN104065027A - Electronic-cigarette protection circuit

Info

Publication number: CN104065027A
Application number: CN201410326199.7A
Authority: CN
Inventors: 黄金珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-09
Filing date: 2014-07-09
Publication date: 2014-09-24

Abstract

The invention discloses an electronic-cigarette protection circuit. The electronic-cigarette protection circuit comprises a battery output terminal, a secondary protection circuit, a battery, a microphone switch and a battery charging module, wherein the battery output terminal, the secondary protection circuit, the battery, the microphone switch and the battery charging module are installed in a shell in sequence. The electronic-cigarette protection circuit has the advantage that output can be stopped when the microphone switch loses efficacy or an electronic cigarette works frequently, and therefore products are protected.

Description

Electronic cigarette protective circuit

Technical field

The present invention relates to protective circuit, especially relate to a kind of protective circuit when miaow head control switch lost efficacy rear or electronic cigarette frequent operation.

Background technology

Current electronic cigarette, as the substitute of cigarette, has advantages of environmental protection and without second-hand-cigarette harm, by people, is accepted extensively; And the electronic cigarette of miaow head control switch mode the most consumer like, the electronic cigarette of miaow head control switch mode is that the variation by air-flow differential causes capacitance variations in miaow head control switch, and then triggers the work of miaow head.

And the protective circuit of the current electronic cigarette battery by miaow head control mode after without any miaow head switch failure; after miaow head switch failure, exist battery to continue the possibility of output, easily cause electronic smoke atomizer continuous firing, gently make atomizer produce peculiar smell; heavy burn out atomizer, cause fire.

Summary of the invention

For addressing the above problem, the object of the present invention is to provide a kind of protective circuit when miaow head control switch lost efficacy rear or electronic cigarette frequent operation.

The present invention realizes by following technical measures, and a kind of electronic cigarette protective circuit comprises the battery output terminal, safe secondary protection circuit, battery, miaow head switch and the battery charging module that are successively set in housing.

As a kind of optimal way; described safe secondary protection circuit comprises the single-chip microcomputer that connects and receive miaow head switching signal; described single-chip microcomputer has the port that connects heating wire and control its Voltage-output; described heating wire connects the output of an electronic switch, and the control end of described electronic switch is connected to the switch control port of single-chip microcomputer.

As a kind of optimal way, described electronic switch is field effect transistor or triode.

As a kind of optimal way, described electronic switch is field effect transistor AO3401, and the source electrode of described field effect transistor connects power supply, and the grid of described field effect transistor connects the switch control port of single-chip microcomputer, and the drain electrode of described field effect transistor connects heating wire.

As a kind of optimal way, described single-chip microcomputer has connecting luminous diode and controls the port of its Voltage-output.

As a kind of optimal way, described battery output terminal is fixed in housing by battery output interface seat.

As a kind of optimal way, the lower end of described housing is also provided with lock button.

The course of work of the present invention is: the negative pressure causing when smoking triggers miaow head switch output services voltage, the master chip of safe secondary protection circuit can pass through the synchronous output voltage of battery output terminal to the heater strip of electronic cigarette, miaow head switch is not worked, and master chip is with regard to Non voltage output; When the operating time of MCU single output voltage, be predetermined value (as 10 seconds), can prevent like this having output after miaow head switch failure always; When the frequency of master chip output voltage per minute is a pre-determined number (as 6 times), can prevent the excessive frequent operation of heating wire; When heating wire short circuit, master chip stops to battery output terminal output, thereby can avoid burning out electronic cigarette miscellaneous part.

Accompanying drawing explanation

Fig. 1 is the cross-sectional view of the embodiment of the present invention;

Fig. 2 is the circuit theory diagrams of embodiment of the present invention safe secondary protection circuit.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the present invention is described in further detail.

A kind of electronic cigarette protective circuit of the present embodiment, please refer to Fig. 1, comprises the battery output terminal 102, safe secondary protection circuit 103, battery 105, miaow head switch 106 and the battery charging module 107 that are successively set in housing 104.

The safe secondary protection circuit 103 of this structure and battery output terminal 102 electrical connections, effective output of safe secondary protection circuit 103 and battery output terminal 102 direct-couplings are also exported to the heater strip of electronic cigarette; The input of safe secondary protection circuit 103 derives from miaow head switch 106 and battery output terminal 102, and miaow head control switch is industry standard part.

The course of work is: the negative pressure causing when smoking triggers miaow head switch 106 output services voltages, and the MCU of safe secondary protection circuit 103 can pass through the synchronous output voltage of battery output terminal 102 to the heater strip of electronic cigarette; Miaow head switch 106 is not worked, and MCU is with regard to Non voltage output; When the operating time of MCU single output voltage, be predetermined value (as 10 seconds), can prevent like this having output after miaow head switch failure always; When the frequency of MCU output voltage per minute is a pre-determined number (as 6 times), can prevent the excessive frequent operation of heating wire; When heating wire short circuit, MCU stops to battery output terminal 102 outputs, thereby can avoid burning out electronic cigarette miscellaneous part.

In the electronic cigarette protective circuit of an embodiment; the circuit diagram that please refer to safe secondary protection circuit is Fig. 2; on the basis of previous technique scheme, can also be specifically; safe secondary protection circuit comprises the single-chip microprocessor MCU that connects and receive miaow head switch 3A signal; described single-chip microprocessor MCU has the port 7 that connects heating wire RL1 and receive its operating voltage; described heating wire RT1 connects the output of an electronic switch Q1, and the control end of described electronic switch Q1 is connected to the switch control port 5 of single-chip microprocessor MCU.The operating voltage of miaow head and circuit board is all: lithium battery (3.0V-4.25V).

Operation principle is with reference to figure 2: when smoking, the 3rd pin of MCU detects the output signal of miaow head switch, and meanwhile, MCU the 5th pin output low level triggers electronic switch Q1 and opens and have a Voltage-output; When heating wire short circuit, MCU the 7th pin can automatically detect output voltage situation and at the 5th pin output high level, close electronic switch Q1 and Non voltage output; While having Voltage-output after miaow head switch failure, at this moment MCU only can work 10 seconds and stop output always; If surpassed continuously 6 output in one minute, MCU can protect and stop output, wait 20 seconds after next time could be worked on, mainly preventing that miaow is first directly has output and damages other device.

In the electronic cigarette protective circuit of an embodiment, please refer to Fig. 2, on the basis of previous technique scheme, can also be specifically that electronic switch Q1 is field effect transistor or triode.

In the electronic cigarette protective circuit of an embodiment; please refer to Fig. 2; on the basis of previous technique scheme, can also be specifically; electronic switch Q1 is field effect transistor AO3401; the source S of described field effect transistor connects power supply; the grid G of described field effect transistor connects the switch control port of single-chip microcomputer, and the drain D of described field effect transistor connects heating wire RT1.

In the electronic cigarette protective circuit of an embodiment, please refer to Fig. 2, on the basis of previous technique scheme, can also be specifically that single-chip microcomputer has connecting luminous diode and controls the port of its Voltage-output.Thereby whether prompting product works on power.

In the electronic cigarette protective circuit of an embodiment, please refer to Fig. 1, on the basis of previous technique scheme, can also be specifically that battery output terminal 102 is fixed in housing 104 by battery output interface seat 101.

In the electronic cigarette protective circuit of an embodiment, please refer to Fig. 1, on the basis of previous technique scheme, can also be specifically that the lower end of housing 104 is also provided with lock button 108.

More than that electronic cigarette protective circuit of the present invention is set forth; be used for helping to understand the present invention; but embodiments of the present invention are not restricted to the described embodiments; anyly do not deviate from the change done under the principle of the invention, modification, substitute, combination, simplify; all should be equivalent substitute mode, be included in protection scope of the present invention in.

Claims

1. an electronic cigarette protective circuit, is characterized in that: comprise the battery output terminal, safe secondary protection circuit, battery, miaow head switch and the battery charging module that are successively set in housing.

2. electronic cigarette protective circuit according to claim 1; it is characterized in that: described safe secondary protection circuit comprises the single-chip microcomputer that connects and receive miaow head switching signal; described single-chip microcomputer has the port that connects heating wire and receive its operating voltage; described heating wire connects the output of an electronic switch, and the control end of described electronic switch is connected to the switch control port of single-chip microcomputer.

3. electronic cigarette protective circuit according to claim 2, is characterized in that: described electronic switch is field effect transistor or triode.

4. electronic cigarette protective circuit according to claim 3; it is characterized in that: described electronic switch is field effect transistor AO3401; the source electrode of described field effect transistor connects power supply, and the grid of described field effect transistor connects the switch control port of single-chip microcomputer, and the drain electrode of described field effect transistor connects heating wire.

5. electronic cigarette protective circuit according to claim 2, is characterized in that: described single-chip microcomputer has connecting luminous diode and controls the port of its Voltage-output.

6. electronic cigarette protective circuit according to claim 1, is characterized in that: described battery output terminal is fixed in housing by battery output interface seat.

7. electronic cigarette protective circuit according to claim 1, is characterized in that: the lower end of described housing is also provided with lock button.