CN208405058U - A kind of Multifunctional hand warming based on power-off protection is precious - Google Patents
A kind of Multifunctional hand warming based on power-off protection is precious Download PDFInfo
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- CN208405058U CN208405058U CN201721531080.9U CN201721531080U CN208405058U CN 208405058 U CN208405058 U CN 208405058U CN 201721531080 U CN201721531080 U CN 201721531080U CN 208405058 U CN208405058 U CN 208405058U
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Abstract
The utility model discloses a kind of, and the Multifunctional hand warming based on power-off protection is precious, is related to hand warmer field；It includes control device, charger baby, heat generating device and power-off protection apparatus；The control device includes single-chip microcontroller, and the power-off protection apparatus includes power failure detection circuit and relay；The heat generating device and key are electrically connected, and the key, power failure detection circuit and relay are electrically connected with single-chip microcontroller, and the relay is also electrically connected with charger baby, and the charger baby and load are electrically connected, and the relay is also electrically connected with input terminal；The utility model solves the problem of existing hand warmer can not disconnect charger baby and load in time, burn out so as to cause hand warmer and charger baby due to a lack of outage detection, has reached timely detection power blackout situation, has realized the effect of real power-off protection.
Description
Technical field
The utility model relates to hand warmer field, especially a kind of Multifunctional hand warming based on power-off protection is precious.
Background technique
Hand warmer is broadly divided into three kinds: it is from traditional hot-water bottle different one is being generated heat with by heating water,
Electric hot-water bag has saved the trouble for adding water, can generate heat as long as upper 10 a few minutes such as plug in；Second is to pass through chemical reaction
Come what is generated heat, heat is generated by the contact of the inside chemical substance, temperature is 40 DEG C or so；The third is using lithium battery function
Can, inner heat piece fever, using USB interface charge and discharge, due to the function of lithium battery energy charge and discharge, generally also as mobile electricity
Source uses, and compact is handy to carry about, and temperature can reach 50 DEG C or so；But and charger baby and hand warmer in one
Hand warmer can be because heat generating device fever influences the performance of charger baby in hand warmer, because power-off time can not be predicted and state is led
Cause the power-off protecting circuit that often has not play the role of real power-off protection, if while because temperature is excessively high when powering off, power-off meeting
It brings surge to interfere, causes power-off protection is impacted to burn out so as to cause charger baby and hand warmer, so needing a kind of base
It realizes in the Multifunctional hand warming treasured of power-off protection through detection power-off electric power thus supplied and realizes power-off protection.
Utility model content
The purpose of this utility model is that: the utility model provides a kind of Multifunctional hand warming treasured based on power-off protection,
Charger baby and load can not be disconnected due to a lack of outage detection in time by solving existing hand warmer, so as to cause hand warmer and charger baby
The problem of burning out.
The technical solution adopted in the utility model is as follows:
A kind of Multifunctional hand warming based on power-off protection is precious, including shell, interface and key, and the key is arranged in shell
Surface, the interface are arranged in casing lateral surfaces, further include control device, charger baby, heat generating device and power-off protection apparatus；Institute
Stating control device includes single-chip microcontroller, and the power-off protection apparatus includes power failure detection circuit and relay；The heat generating device with
Key be electrically connected, the key, power failure detection circuit and relay with single-chip microcontroller be electrically connected, the relay also with fill
Electric precious electric connection, the charger baby and load are electrically connected, and the relay is also electrically connected with input terminal.
Preferably, the power failure detection circuit includes detection unit and anti-interference unit；The detection unit input terminal with
Mains electricity input end is connected in parallel, and the detection unit output end and anti-interference unit input terminal are electrically connected, the anti-interference list
First output end and single-chip microcontroller are electrically connected.
Preferably, the detection unit connection is as follows: after mains electricity input end one end is sequentially connected with diode D5 and resistance R6
Optocoupler U1 input terminal one end is connected, mains electricity input end one end connects the optocoupler U1 input terminal other end, and the defeated place end one optocoupler U1 terminates
VCC, the other end after diode D3 via being grounded, and for the other end also via being grounded after diode D2 connection capacitor C1, capacitor C1 is another
Via being grounded after resistance R1 connection adjustable resistance R11, the adjustable resistance R11 other end connects the normal phase input end of amplifier U0A at end,
The adjustable resistance R11 other end is also connected with resistance R2 and meets VCC, and resistance R2 is also connected with after the inverting input terminal of amplifier U0A through by two
It is grounded after pole pipe D1, the positive power source terminal of amplifier U0A connects VCC, and the negative power end ground connection of amplifier U0A, amplifier U0A's is defeated
Outlet connection resistance R3 is followed by VCC, and the output end of amplifier U0A is also connected with the input terminal of anti-interference unit.
Preferably, the connection of the anti-interference unit is as follows: the reverse phase of the input terminal connection amplifier U2A of anti-interference unit
Input terminal, for the normal phase input end of amplifier U2A via being grounded after resistance R12 connection voltage-stabiliser tube D11, the positive of amplifier U2A is defeated
Enter end via the output end of resistance R13 connection amplifier U2A, the positive power source terminal of amplifier U2A connects VCC, and amplifier U2A is just
Power end is also grounded via the negative power end of resistance R10 connection voltage-stabiliser tube D11, amplifier U2A, and the output end of amplifier U2A is also
Connect single-chip microcontroller pin VOUT.
Preferably, the charger baby is arranged in shell, is provided with thermal insulation layer between the charger baby and shell.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1. outage detection unit, charger baby and relay is arranged in the utility model, disconnected in time by detecting power blackout situation
The connection of input terminal and charger baby, change charger baby and load connection, avoid it is existing because delay caused by power-off protection it is excessively slow,
So as to cause hand warmer and the shortcomings that burning out of charger baby, solving existing hand warmer can not disconnect in time due to a lack of outage detection
Charger baby and load the problem of burning out so as to cause hand warmer and charger baby, have reached timely detection power blackout situation, realize real
Power-off protection effect；
2. the power failure detection circuit of the utility model realizes photoelectric conversion by setting photoelectrical coupler, filter circuit is set
Removal interference, anti-jamming circuit further ensure outage detection using voltage-stablizer and hysteresis comparator removal shake and interference
Accuracy and improve outage detection efficiency；
3. thermal insulation layer is arranged between the shell and charger baby of the utility model, heat generating device fever is avoided to cause power-off protection
On the other hand the interference of circuit protects the environment of charger baby to influence power-off protection, the service life caused by avoiding because of high temperature subtracts
Short problem is conducive to the practicability for improving hand warmer.
Detailed description of the invention
The utility model will illustrate by example and with reference to the appended drawing, in which:
Fig. 1 is the system block diagram of the utility model；
Fig. 2 is the power failure detection circuit figure of the utility model.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It elaborates below with reference to Fig. 1, Fig. 2 to the utility model.
A kind of Multifunctional hand warming based on power-off protection is precious, including shell, interface and key, and key is arranged in shell table
Face, interface are arranged in casing lateral surfaces, further include control device, charger baby, heat generating device and power-off protection apparatus；Control device
Including single-chip microcontroller, power-off protection apparatus includes power failure detection circuit and relay；Heat generating device and key are electrically connected, key,
Power failure detection circuit and relay are electrically connected with single-chip microcontroller, and relay is also electrically connected with charger baby, charger baby and load
It is electrically connected, relay is also electrically connected with input terminal.
Power failure detection circuit includes detection unit and anti-interference unit；Detection unit input terminal is in parallel with mains electricity input end to be connected
It connects, detection unit output end and anti-interference unit input terminal are electrically connected, and anti-interference unit output end and single-chip microcontroller are electrically connected.
Detection unit connection is as follows: connection optocoupler U1 is defeated after mains electricity input end one end is sequentially connected with diode D5 and resistance R6
Enter and hold one end, mains electricity input end one end connects the optocoupler U1 input terminal other end, and the defeated place end one optocoupler U1 terminates VCC, other end warp
By being grounded after diode D3, the other end after diode D2 connection capacitor C1 also via being grounded, and the capacitor C1 other end is via resistance R1
It is grounded after connection adjustable resistance R11, the adjustable resistance R11 other end connects the normal phase input end of amplifier U0A, adjustable resistance R11
The other end is also connected with resistance R2 and meets VCC, and resistance R2 is followed by after being also connected with the inverting input terminal of amplifier U0A by diode D1
Ground, the positive power source terminal of amplifier U0A connect VCC, the negative power end ground connection of amplifier U0A, and the output end of amplifier U0A connects electricity
Resistance R3 is followed by VCC, and the output end of amplifier U0A is also connected with the input terminal of anti-interference unit.
The connection of anti-interference unit is as follows: the inverting input terminal of the input terminal connection amplifier U2A of anti-interference unit, amplification
The normal phase input end of device U2A after resistance R12 connection voltage-stabiliser tube D11 via being grounded, and the normal phase input end of amplifier U2A is via resistance
The output end of R13 connection amplifier U2A, the positive power source terminal of amplifier U2A connect VCC, the positive power source terminal of amplifier U2A also via
The negative power end of resistance R10 connection voltage-stabiliser tube D11, amplifier U2A are grounded, and the output end of amplifier U2A is also connected with monolithic power traction
Foot VOUT.
Charger baby is arranged in shell, is provided with thermal insulation layer between the charger baby and shell.
Embodiment 2
It uses principle: pressing the button, hand warmer is started to work, and starts fever as hand warmer after heat generating device connection power supply
It uses；When hand warmer connection unit is charged, i.e. normal power supply situation, power failure detection circuit export low level, monolithic power traction
Foot VOUT is low level, and trigger relay is opened, and alternating current directly inputs charger baby, if there is load, alternating current is defeated via charger baby
Enter load；If when power-off, power failure detection circuit exports high level, single-chip microcontroller pin VOUT is high level, and trigger relay disconnects,
Charger baby output is converted to, the disconnection and connection of single-chip microcontroller control load, heat generating device and key if detecting load variation
It is electrically connected, key, power failure detection circuit and relay are electrically connected with single-chip microcontroller, and relay also electrically connects with charger baby
It connects, charger baby and load are electrically connected, and relay is also electrically connected with input terminal, are realized protection hand warmer under power blackout situation and are filled
It is electric precious, avoid existing hand warmer power-off because the impact of not set power-off protection bring leads to the damage of device；Hand warmer collection simultaneously
Charging and warm hand improve the safety and stability of hand warmer power-off, realize disconnected in one while optimizing the function of hand warmer
Electric protection；Power failure detection circuit includes detection unit and anti-interference unit, and the removals such as filter capacitor interference is arranged in detection unit, together
The anti-interference unit of Shi Zengshe introduces hysteresis comparator, removal shake and interference in detection unit output end, guarantees outage detection
Accuracy；Thermal insulation layer is arranged between shell and charger baby prevents superheating of heating device influence caused by charger baby, further mentions
The practicability of high hand warmer.Outage detection unit, charger baby and relay is arranged in the utility model, by detection power blackout situation and
When disconnect input terminal and charger baby connection, change charger baby and load connection, avoid it is existing because delay caused by power off protect
Protected slow, so as to cause hand warmer and the shortcomings that burning out of charger baby, solving existing hand warmer can not due to a lack of outage detection
Charger baby and load are disconnected in time, the problem of burning out so as to cause hand warmer and charger baby, have reached timely detection power blackout situation,
Realize the effect of real power-off protection.
Claims (5)
1. a kind of Multifunctional hand warming based on power-off protection is precious, including shell, interface and key, the key is arranged in shell table
Face, the interface are arranged in casing lateral surfaces, it is characterised in that: further include that control device, charger baby, heat generating device and power-off are protected
Protection unit；The control device includes single-chip microcontroller, and the power-off protection apparatus includes power failure detection circuit and relay；The hair
Thermal and key are electrically connected, and the key, power failure detection circuit and relay are electrically connected with single-chip microcontroller, the relay
Device is also electrically connected with charger baby, and the charger baby and load are electrically connected, and the relay is also electrically connected with input terminal.
2. a kind of Multifunctional hand warming based on power-off protection according to claim 1 is precious, it is characterised in that: the power-off inspection
Slowdown monitoring circuit includes detection unit and anti-interference unit；The detection unit input terminal is connected in parallel with mains electricity input end, the inspection
It surveys unit output end and anti-interference unit input terminal is electrically connected, the anti-interference unit output end and single-chip microcontroller are electrically connected.
3. a kind of Multifunctional hand warming based on power-off protection according to claim 2 is precious, it is characterised in that: the detection is single
Member connection is as follows: mains electricity input end one end connects optocoupler U1 input terminal one end, alternating current after being sequentially connected with diode D5 and resistance R6
Input terminal one end connects the optocoupler U1 input terminal other end, and the defeated place end one optocoupler U1 terminates VCC, and the other end is followed by via diode D3
Ground, the other end after diode D2 connection capacitor C1 also via being grounded, and the capacitor C1 other end is via resistance R1 connection adjustable resistance R11
After be grounded, the adjustable resistance R11 other end connects the normal phase input end of amplifier U0A, and the adjustable resistance R11 other end is also connected with resistance
R2 meets VCC, and resistance R2 is grounded after by diode D1 after being also connected with the inverting input terminal of amplifier U0A, the positive electricity of amplifier U0A
Source connects VCC, and the output end connection resistance R3 of the negative power end ground connection of amplifier U0A, amplifier U0A is followed by VCC, amplifier
The output end of U0A is also connected with the input terminal of anti-interference unit.
4. a kind of Multifunctional hand warming based on power-off protection according to claim 3 is precious, it is characterised in that: described anti-interference
The connection of unit is as follows: the inverting input terminal of the input terminal connection amplifier U2A of anti-interference unit, the positive of amplifier U2A are defeated
Enter end via being grounded after resistance R12 connection voltage-stabiliser tube D11, the normal phase input end of amplifier U2A is via resistance R13 connection amplifier
The output end of U2A, the positive power source terminal of amplifier U2A connect VCC, and the positive power source terminal of amplifier U2A is also steady via resistance R10 connection
The negative power end of pressure pipe D11, amplifier U2A are grounded, and the output end of amplifier U2A is also connected with single-chip microcontroller pin VOUT.
5. a kind of Multifunctional hand warming based on power-off protection according to claim 4 is precious, it is characterised in that: the charger baby
It is arranged in shell, is provided with thermal insulation layer between the charger baby and shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721531080.9U CN208405058U (en) | 2017-11-16 | 2017-11-16 | A kind of Multifunctional hand warming based on power-off protection is precious |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721531080.9U CN208405058U (en) | 2017-11-16 | 2017-11-16 | A kind of Multifunctional hand warming based on power-off protection is precious |
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| Publication Number | Publication Date |
|---|---|
| CN208405058U true CN208405058U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721531080.9U Active CN208405058U (en) | 2017-11-16 | 2017-11-16 | A kind of Multifunctional hand warming based on power-off protection is precious |
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| CN (1) | CN208405058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107773347A (en) * | 2017-11-16 | 2018-03-09 | 绵阳市建诚电子有限公司 | A kind of multifunctional electro-heating hand warmer based on power-off protection |
-
2017
- 2017-11-16 CN CN201721531080.9U patent/CN208405058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107773347A (en) * | 2017-11-16 | 2018-03-09 | 绵阳市建诚电子有限公司 | A kind of multifunctional electro-heating hand warmer based on power-off protection |
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