CN201616664U - Mobile phone charger overheating alarm and protection device - Google Patents
Mobile phone charger overheating alarm and protection device Download PDFInfo
- Publication number
- CN201616664U CN201616664U CN2010200264100U CN201020026410U CN201616664U CN 201616664 U CN201616664 U CN 201616664U CN 2010200264100 U CN2010200264100 U CN 2010200264100U CN 201020026410 U CN201020026410 U CN 201020026410U CN 201616664 U CN201616664 U CN 201616664U
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a mobile phone charger overheating alarm and protection device, comprises an overheating monitoring circuit, a reminding circuit and an automatic cutting off circuit; the overheating monitoring circuit comprises a sliding resistor R1, a comparator, a thermistor RT, a fixed resistor R2; the reminding circuit comprises an audion which is used as a switch, a light emitting diode, a buzzer and a fixed resistor R3; the automatic cutting off circuit comprises an audion which is used as a switch and an electromagnetic relay J. The temperature of a heating source is induced by the thermistor and the temperature value is displayed; a set reminding temperature is adjusted by the sliding resistor; the light emitting diode is started to flash and the buzzer is started to alarm to remind users when overheating occurs by utilizing the comparator and the switching characteristic of the audion; meanwhile, the power source of the mobile phone charger is cut off by utilizing the electromagnetic relay, thereby achieving the purposes of safely using the mobile phone charger to charge.
Description
Technical field
The utility model belongs to tame electro-technical field, is specifically related to a kind of charger for mobile phone temperature alarm and protective device.
Background technology
Along with mobile phone is more and more universal, charger for mobile phone has become an indispensable part in people's life.The charger for mobile phone long temperature service time easy initiation potential that raises.Owing to fire, explosive incident that charger for mobile phone uses reasons such as too high or itself quality of temperature does not too for a long time pass a test to cause are of common occurrence, the security of the lives and property that has greatly threatened the people.
Summary of the invention
The technical problem that the utility model solves provides a kind of charger for mobile phone temperature alarm and protective device, sends when the cell-phone charging actuator temperature is too high and reminds and cut off automatically the charger power supply.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of charger for mobile phone temperature alarm and protective device, it comprises overheated observation circuit, alert circuit and automatic shutdown circuit; Alert circuit links to each other with overheated observation circuit with automatic shutdown circuit;
Overheated observation circuit comprises slide resistor R
1, comparator, thermistor R
T, fixed value resistance R
2Slide resistor R
1Constitute bleeder circuit and insert an input of comparator as measuring basis; Thermistor R
TWith fixed value resistance R
2Constitute another input that bleeder circuit inserts comparator; The output of comparator inserts alert circuit;
Alert circuit comprises triode, alarm set and the fixed value resistance R as switch
3Alarm set, fixed value resistance R
3The collector electrode of triode is inserted in the series connection rear end; The base stage of triode inserts the output of comparator;
Automatic shutdown circuit comprises triode, electromagnetic relay J, electromagnetic relay J and alarm set and fixed value resistance R
3Parallel connection, after the triode conducting, electromagnetic relay J control charger for mobile phone disconnects.
Alternatively, alarm set is light-emitting diode and buzzer.
Compared with prior art, the utlity model has following beneficial effect:
The utility model is responded to pyrotoxin by thermistor; Utilize slide resistor to regulate the prompting temperature of setting; Utilize the switching characteristic of comparator and triode, when temperature is too high, start alarm set, remind the user; Utilize electromagnetic relay to cut off the charger for mobile phone power supply simultaneously, reach the purpose of safe handling charger for mobile phone with low-voltage switches control.This temperature alarm and protective device cost are low, easy and simple to handle; The prompting temperature is adjustable, and is highly sensitive; Can cut off the electricity supply automatically, fail safe is good; Applicability is strong, has good popularization value.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model specific embodiment;
Fig. 2 is the circuit diagram of the utility model specific embodiment.
Embodiment
Elaborate the utility model below in conjunction with accompanying drawing.
With reference to shown in Figure 1, specific embodiment of the utility model charger for mobile phone temperature alarm and protective device comprises overheated observation circuit, alert circuit and automatic shutdown circuit, and alert circuit links to each other with overheated observation circuit with automatic shutdown circuit.When temperature was higher than the prompting temperature of setting, overheated observation circuit was just connected alert circuit and automatic shutdown circuit, and the reminds people temperature is too high, and cut off the electricity supply automatically, prevented that temperature from continuing to raise.
With reference to shown in Figure 2, the overheated observation circuit of specific embodiment of the utility model charger for mobile phone temperature alarm and protective device comprises slide resistor R
1, comparator, thermistor R
T, fixed value resistance R
2"+" of comparator (homophase) end and "-" (anti-phase) end are signal input parts.When the voltage of "+" end is higher than the voltage of "-" end, comparator output high level; When the voltage of "+" end is lower than the voltage of "-" end, the comparator output low level.
Slide resistor R
1Be used to regulate the prompting temperature of setting, an input of its formation bleeder circuit access comparator for example "+" is held as measuring basis; Thermistor R
TWith fixed value resistance R
2Another input of formation bleeder circuit access comparator is "-" end for example; Thermistor R
TResistance reduce with the rising of temperature.Like this when temperature raises, thermistor R
TThe voltage at two ends reduces, and the voltage of comparator "-" end raises, and makes the comparator output low level.
Overheated observation circuit also comprises temperature indicator, is used to the real-time temperature that shows that thermistor records.
The output of comparator inserts alert circuit.
Alert circuit comprises as the triode of switch, alarm set for example light-emitting diode and buzzer and fixed value resistance R
3
Triode is a switch element.When base potential was low level, the triode conducting was as the switch of closure; When base potential was high level, triode ended, as the switch that disconnects.
Light-emitting diode plays the caution flashing light; Buzzer is used to sound the alarm.Fixed value resistance R
3Be used to regulate the electric current of branch road.
Alarm set is light-emitting diode and/or buzzer, fixed value resistance R for example
3The collector electrode of triode is inserted in the series connection rear end; The base stage of triode inserts the output of comparator;
Automatic shutdown circuit comprises triode, electromagnetic relay J, and electromagnetic relay J and alarm set be light-emitting diode and/or buzzer and fixed value resistance R for example
3Parallel connection, electromagnetic relay J normally-closed contact place in circuit, the break-make of control charger power supply, after the triode conducting, electromagnetic relay J control charger for mobile phone power supply disconnects.
Under the normal temperature, thermistor R
TResistance higher, the voltage of comparator "+" end is higher than the voltage of "-" end, comparator output high level, triode ends, the light-emitting diode outage is not luminous, the buzzer outage is not sounded; Along with the rising of temperature, thermistor R
TResistance reduce, the voltage of comparator "-" end constantly raises, when being higher than "+" terminal voltage, the comparator output low level, the triode conducting, the light-emitting diode electrified light emitting, buzzer is sounded, and reaches the prompting purpose.The charger for mobile phone power supply is cut off in electromagnetic relay J energising simultaneously, and temperature tops out, protection electrical equipment.
The specific embodiment of the utility model charger for mobile phone temperature alarm and protective device is responded to pyrotoxin by thermistor; Utilize slide resistor to regulate the prompting temperature of setting; Utilize the switching characteristic of comparator and triode, when overheated, start alarm set, remind the user; Utilize electromagnetic relay to cut off charger for mobile phone simultaneously, reach the purpose of safe handling charger for mobile phone with low-voltage switches control.This temperature alarm and protective device cost are low, easy and simple to handle; The prompting temperature is adjustable, and is highly sensitive; Can cut off the electricity supply automatically, fail safe is good; Has good popularization value.
The above only is an embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. charger for mobile phone temperature alarm and protective device is characterized in that, comprise overheated observation circuit, alert circuit and automatic shutdown circuit; Described alert circuit links to each other with described overheated observation circuit with automatic shutdown circuit;
Described overheated observation circuit comprises slide resistor R
1, comparator, thermistor R
T, fixed value resistance R
2Described slide resistor R
1Constitute bleeder circuit and insert an input of comparator as measuring basis; Described thermistor R
TWith fixed value resistance R
2Constitute another input that bleeder circuit inserts comparator; The output of described comparator inserts alert circuit;
Described alert circuit comprises triode, alarm set and the fixed value resistance R as switch
3Described alarm set, fixed value resistance R
3The collector electrode of triode is inserted in the series connection rear end; The base stage of described triode inserts the output of described comparator;
Described automatic shutdown circuit comprises triode, electromagnetic relay J, described electromagnetic relay J and described alarm set and fixed value resistance R
3Parallel connection, after the described triode conducting, electromagnetic relay J control charger for mobile phone power supply disconnects.
2. charger for mobile phone temperature alarm according to claim 1 and protective device is characterized in that, described alarm set is light-emitting diode and/or buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200264100U CN201616664U (en) | 2010-01-11 | 2010-01-11 | Mobile phone charger overheating alarm and protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200264100U CN201616664U (en) | 2010-01-11 | 2010-01-11 | Mobile phone charger overheating alarm and protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201616664U true CN201616664U (en) | 2010-10-27 |
Family
ID=43003026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200264100U Expired - Fee Related CN201616664U (en) | 2010-01-11 | 2010-01-11 | Mobile phone charger overheating alarm and protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201616664U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082868A (en) * | 2010-12-15 | 2011-06-01 | 上海华勤通讯技术有限公司 | Mobile phone abnormal temperature charging control alarm system |
| CN102195270A (en) * | 2011-05-31 | 2011-09-21 | 无锡新纬电池有限公司 | Over-charge and over-heat alarm protecting structure of soft-shell lithium battery |
| CN102269041A (en) * | 2011-08-26 | 2011-12-07 | 龚文资 | Alarm circuit for poor heat radiation of automobile engine water tank |
| CN103346551A (en) * | 2013-06-14 | 2013-10-09 | 成都锐奕信息技术有限公司 | Power supply reversal connection alarming type charger |
| CN104079035A (en) * | 2014-07-17 | 2014-10-01 | 苏州凯丰电子电器有限公司 | Temperature-control charger |
| CN105826964A (en) * | 2015-09-14 | 2016-08-03 | 维沃移动通信有限公司 | Charging protection circuit, terminal and charging power supply |
| CN105958442A (en) * | 2016-06-15 | 2016-09-21 | 维沃移动通信有限公司 | Overheat protection method and circuit and mobile terminal |
| CN106953381A (en) * | 2017-04-13 | 2017-07-14 | 上海与德科技有限公司 | Temperature protection circuit, method and the terminal device of charging inlet |
| CN109802590A (en) * | 2018-12-29 | 2019-05-24 | 北京雪迪龙科技股份有限公司 | A kind of AC control circuit with overheat protector |
-
2010
- 2010-01-11 CN CN2010200264100U patent/CN201616664U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082868A (en) * | 2010-12-15 | 2011-06-01 | 上海华勤通讯技术有限公司 | Mobile phone abnormal temperature charging control alarm system |
| CN102195270A (en) * | 2011-05-31 | 2011-09-21 | 无锡新纬电池有限公司 | Over-charge and over-heat alarm protecting structure of soft-shell lithium battery |
| CN102269041A (en) * | 2011-08-26 | 2011-12-07 | 龚文资 | Alarm circuit for poor heat radiation of automobile engine water tank |
| CN103346551A (en) * | 2013-06-14 | 2013-10-09 | 成都锐奕信息技术有限公司 | Power supply reversal connection alarming type charger |
| CN104079035A (en) * | 2014-07-17 | 2014-10-01 | 苏州凯丰电子电器有限公司 | Temperature-control charger |
| CN105826964A (en) * | 2015-09-14 | 2016-08-03 | 维沃移动通信有限公司 | Charging protection circuit, terminal and charging power supply |
| CN105826964B (en) * | 2015-09-14 | 2017-12-26 | 维沃移动通信有限公司 | A kind of charge protector, terminal and charge power supply |
| CN105958442A (en) * | 2016-06-15 | 2016-09-21 | 维沃移动通信有限公司 | Overheat protection method and circuit and mobile terminal |
| CN106953381A (en) * | 2017-04-13 | 2017-07-14 | 上海与德科技有限公司 | Temperature protection circuit, method and the terminal device of charging inlet |
| CN109802590A (en) * | 2018-12-29 | 2019-05-24 | 北京雪迪龙科技股份有限公司 | A kind of AC control circuit with overheat protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20140111 |