CN206303723U - Electric heating kettle - Google Patents
Electric heating kettle Download PDFInfo
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- CN206303723U CN206303723U CN201621093441.1U CN201621093441U CN206303723U CN 206303723 U CN206303723 U CN 206303723U CN 201621093441 U CN201621093441 U CN 201621093441U CN 206303723 U CN206303723 U CN 206303723U
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- 238000005485 electric heating Methods 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims description 49
- 230000009466 transformation Effects 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an electric kettle, which comprises a rectification filter module (2), a switching power supply chip (3) and a voltage conversion module (4); a first input end (2a) of the rectification filter module (2) is connected with a live wire of the commercial power supply (1), a first output end (2b) of the rectification filter module (2) is connected with a zero wire of the commercial power supply (1), a second output end (2c) of the rectification filter module (2) is connected with an input end of the switch power supply chip (3), and the voltage conversion module (4) is respectively connected with an output end of the switch power supply chip (3) and a second input end (2d) of the rectification filter module (2); the voltage conversion module (4) is used for converting the voltage output by the switching power supply chip (3) into the working voltage of the micro control unit (6), the relay (5) and the sensor (7). Therefore, the stable working voltage can be provided for each load only through one voltage conversion module, and the manufacturing cost of the electric kettle is reduced.
Description
Technical field
The utility model is related to household electrical appliance technical field, more particularly to a kind of electric kettle.
Background technology
Electric kettle have the advantages that to heat up water it is fast, be moved easily, without oil smoke, it has also become it is essential in people's daily life
Electrical equipment.
Switching power circuit plate is provided with electric kettle, the 220V voltages for mains supply to be exported are changed, and are
Micro-control unit (Micro Controller Unit, abbreviation MCU), relay and sensor offer work in electric kettle
Voltage.In the electric kettle of prior art, the operating voltage of relay is 12V, and the operating voltage of MCU and sensor is 5V.Should
Switching power circuit plate includes first voltage modular converter and second voltage modular converter, and relay is connected to first voltage and turns
Between mold changing block and second voltage modular converter, MCU and sensor are connected to the output end of second voltage modular converter, the first electricity
Pressure modular converter is used to for the output voltage of mains supply to be first reduced to 12V, operating voltage is provided with to relay, then by the
The 12V voltage conversions are 5V by two voltage transformation modules, and operating voltage is provided with to MCU and sensor, so that relay,
MCU and sensor being capable of normal works.
However, because prior art needs two voltage transformation modules to be dropped to the voltage that mains supply is provided successively
Pressure, required electronic device quantity is more, causes the cost of manufacture of electric kettle higher.
Utility model content
For at least one problem for solving to be mentioned in background technology, the utility model provides a kind of electric kettle, can
Reduce the cost of manufacture of electric kettle.
To achieve these goals, the utility model provides a kind of electric kettle, including：Rectification filtering module, switch electricity
Source chip and voltage transformation module；The first input end of the rectification filtering module is connected with the live wire of mains supply, described whole
Flow filtration module the first output end be connected with the zero line of the mains supply, the second output end of the rectification filtering module and
The input connection of the switching power source chip, the voltage transformation module respectively with the output end of the switching power source chip and
The second input connection of the rectification filtering module；The rectification filtering module is used for the output voltage to the mains supply
Carry out rectification and filter, the voltage conversion that the voltage transformation module is used to export the switching power source chip is microcontroller list
The operating voltage of unit, relay and sensor, wherein, the work of the micro-control unit, the relay and the sensor
Voltage is identical.So by setting switching power source chip and voltage transformation module, and by micro-control unit, relay and sensor
Operating voltage be set to unanimously so that rectified filtration module carries out the voltage after rectifying and wave-filtering in switching power source chip and electricity
Operating voltage needed for being converted to micro-control unit, relay and sensor in the presence of pressure modular converter, so as to only pass through one
Individual voltage transformation module is the conversion for being capable of achieving mains supply output voltage, is micro-control unit, relay and sensor power,
Compared with prior art, the quantity of electronic device is reduced, the cost of manufacture of electric kettle is greatly reduced.
Optionally, the voltage transformation module includes：Charge-discharge circuit, the charge-discharge circuit is electric with the switch respectively
The second input connection of the output end of source chip and the rectification filtering module.So by the alternating charge and discharge of charge-discharge circuit
Electricity realizes the conversion of voltage, and circuit control is precisely and convenient.
Optionally, the switching power source chip is three foot control power supply chips, and the charge-discharge circuit is connected to described opening
First output end of powered-down source chip.
Optionally, the voltage transformation module also includes：Output voltage feedback circuit, the output voltage feedback circuit connects
The second output end of the switching power source chip is connected on, and the output voltage feedback circuit is connected in parallel on the charge-discharge circuit
On.So when the output voltage of charge-discharge circuit is higher or lower than the operating voltage of micro-control unit, relay and sensor,
Now the voltage feeds back to switching power source chip through output voltage feedback circuit, due to output voltage and the charging of charge-discharge circuit
Time is relevant, charging duty cycle is adjusted by switching power source chip, by changing the charging interval of charging and discharging circuit, by charge and discharge
The output voltage of circuit is adjusted to the operating voltage of micro-control unit, relay and sensor, is filled so as to further increase
The stability of discharge circuit output voltage.
Optionally, the charge-discharge circuit includes：First resistor, charging inductance, the first electric capacity and the first diode；
The first end of the first resistor is connected with the first output end of the switching power source chip, the first resistor
Second end is connected with the first end of the charging inductance, and the second end of the charging inductance connects with the first end of first electric capacity
Connect, the second end of first electric capacity is respectively with second input and first diode of the rectification filtering module just
Extreme connection, and first electric capacity the second end ground connection, the of the negative pole end of first diode and the charging inductance
One end connects.
Optionally, the output voltage feedback circuit includes：Second diode and the second electric capacity；
The positive terminal of second diode is connected with the second end of the charging inductance, the negative pole of second diode
End is connected with the second output end of the switching power source chip, first end and the switching power source chip of second electric capacity
Second output end is connected, and the second end of second electric capacity is connected with the first end of the charging inductance.
Optionally, also include：It is connected to the protection module between the mains supply and the rectification filtering module.So
Prevent input current or voltage excessive and cause circuit malfunctions by setting protection module.
Optionally, the protection module includes：Current-limiting resistance and overvoltage absorption resistance；The first end of the current-limiting resistance
Live wire with the mains supply is connected, and the second end of the current-limiting resistance connects with the first input end of the rectification filtering module
Connect；The first end of the overvoltage absorption resistance is connected with the live wire of the mains supply, and the of the overvoltage absorption resistance
Two ends are connected with the zero line of the mains supply.Current limliting is so carried out by current-limiting resistance, input to rectification filtering module is prevented
Electric current it is excessive.When thundering, can there is surge voltage in voltage, be absorbed surge voltage by overvoltage absorption resistance
Fall, so as to prevent input voltage too high suddenly, whole circuit is protected.
Optionally, the rectification filtering module includes：Rectifier bridge and filter circuit；The first input end of the rectifier bridge with
The live wire connection of the mains supply, the first output end of the rectifier bridge is connected with the zero line of the mains supply, described whole
The second output end for flowing bridge is connected with the input of the filter circuit, the output end of the filter circuit and the Switching Power Supply
The input connection of chip.Rectification is so carried out to the 220V alternating currents that mains supply is exported by rectifier bridge, is converted into
Direct current, is then removed the High-frequency Interference in the direct current by filter circuit.
Construction of the present utility model and its other purposes and beneficial effect will by with reference to accompanying drawing to preferred real
Apply the description of example and more obvious understandable.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are
Some embodiments of the present utility model, for those of ordinary skill in the art, are not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
The structured flowchart one of the electric kettle that Fig. 1 is provided for the embodiment of the utility model one；
The structured flowchart two of the electric kettle that Fig. 2 is provided for the embodiment of the utility model one；
Physical circuit figure in the electric kettle that Fig. 3 is provided for the embodiment of the utility model one.
Description of reference numerals：
1-mains supply；2-rectification filtering module；3-switching power source chip；4-voltage transformation module；5-relay
Device；6-micro-control unit；7-sensor；8-protection module；L-live wire；N-zero line；21-rectifier bridge；22-filtered electrical
Road；2a-first input end；2b-the first output end；2c-the second output end；2d-the second input；41-discharge and recharge electricity
Road；42-output voltage feedback circuit；81-current-limiting resistance；82-overvoltage absorption resistance；221-the three electric capacity；222-electricity
Sense；223-the four electric capacity；411-first resistor；412-charging inductance；413-the first electric capacity；414-second resistance；
415-the first diode；421-the second diode；422-the second electric capacity；A-the first tie point；B-the second tie point.
Specific embodiment
The structured flowchart one of the electric kettle that Fig. 1 is provided for the embodiment of the utility model one.Shown in reference picture 1, this implementation
Example provides a kind of electric kettle, including：Rectification filtering module 2, switching power source chip 3 and voltage transformation module 4.Wherein, rectification
Filtration module 2 has two inputs and two output ends.Two inputs include：First input end 2a and the second input
2d.Two output ends include：First output end 2b and the second output end 2c.The first input end 2a of rectification filtering module 2 and city
The live wire L connections of power supply 1, the first output end 2b of rectification filtering module 2 is connected with the zero line N of mains supply 1.Rectifying and wave-filtering
Second output end 2c of module 2 is connected with the input of switching power source chip 3.Voltage transformation module 4 respectively with Switching Power Supply core
The second input 2d connections of the output end and rectification filtering module 2 of piece 3.
Rectification filtering module 2 is connected with mains supply 1, and the voltage for mains supply 1 to be exported carries out rectification and filters,
It is then input to switching power source chip 3.The voltage conversion that voltage transformation module 4 is used to export switching power source chip 3 is micro-control
The operating voltage of unit processed 6, relay 5 and sensor 7, wherein, the work electricity of micro-control unit 6, relay 5 and sensor 7
Pressure is identical.
Specifically, mains supply 1 is external power source, and the voltage of the output of mains supply 1 is 220V alternating currents.Mains supply
1 by 220V exchange electricity outputs to rectification filtering module 2, the rectification filtering module 2 pairs 220V alternating currents carry out rectification, change it
It is direct current, and the direct current is filtered, the High-frequency Interference in direct current is removed, is that switching power source chip 3 is powered.Electricity
Pressure modular converter 4 is changed to the voltage that switching power source chip 3 is exported, and is converted into micro-control unit 6, the and of relay 5
The operating voltage of sensor 7.
In the present embodiment, micro-control unit 6, relay 5 are identical with the operating voltage of sensor 7, micro- in the present embodiment
The operating voltage of control unit 6, relay 5 and sensor 7 is 5V.That is, the 220V alternating currents that mains supply 1 is provided
After the rectification of rectified filtration module 2 and filtering, export to switching power source chip 3, then export switching power source chip 3 to voltage
Modular converter 4, voltage transformation module 4 is changed to voltage, final output 5V voltages, thus simultaneously for micro-control unit 6, after
Electrical equipment 5 and sensor 7 provide operating voltage.It should be noted that the work electricity of micro-control unit 6, relay 5 and sensor 7
Pressure can be set according to the actual requirements, and the utility model is not construed as limiting to this.Micro-control unit 6, relay 5 and sensor
7 output ends for being both connected to voltage transformation module 4, as shown in figure 1, micro-control unit 6, relay 5 and sensor 7 can mutually simultaneously
The output end of voltage transformation module 4 is associated in, so that voltage transformation module 4 is respectively to micro-control unit 6, relay 5 and sensor 7
5V operating voltages are provided.It is of course also possible to as shown in figure 3, micro-control unit 6 is connected to the output end of voltage conversion device 4, after
Electrical equipment 5 and sensor 7 are connected with micro-control unit 6 respectively, and in that case, voltage conversion device 4 is carried to micro-control unit 6
For 5V operating voltages, then 5V operating voltages are provided to relay 5 and sensor 7 by micro-control unit 6.
The electric kettle that the present embodiment is provided, by setting switching power source chip and voltage transformation module, and by microcontroller
Unit, relay are set to consistent with the operating voltage of sensor so that rectified filtration module carries out the electricity after rectifying and wave-filtering
Work needed for being converted to micro-control unit, relay and sensor is pressed in the presence of switching power source chip and voltage transformation module
Make voltage, so as to only be the conversion for being capable of achieving mains supply output voltage by voltage transformation module, be micro-control unit,
Relay and sensor power, compared with prior art, reduce the quantity of electronic device, greatly reduce the system of electric kettle
Make cost.
Specifically, voltage transformation module 4 includes：Charge-discharge circuit 41, charge-discharge circuit 41 respectively with switching power source chip 3
Output end and rectification filtering module 2 the second input 2d connection.That is, the input of charge-discharge circuit 41 is connected to
The output end of switching power source chip 3, meanwhile, charge-discharge circuit 41 is connected with the second input 2d of rectification filtering module 2, passes through
The conversion to input voltage is realized in the alternating discharge and recharge of charge-discharge circuit 41, so that the output end in charge-discharge circuit 41 exports one
The operating voltage of individual stabilization, the operating voltage be micro-control unit 6, relay 5 and sensor 7 needed for operating voltage.
In order to ensure the stability of the output voltage of charge-discharge circuit 41, more preferably, switching power source chip 3 selects three
Foot control power supply chip, three foot control power supply chips have an input and two output ends, three foot control power supply chips it is defeated
Enter the second output end 2c of end connection rectification filtering module 2, charge-discharge circuit 41 is connected to the first of three foot control power supply chips
Output end.Voltage transformation module 4 also includes output voltage feedback circuit 42, and output voltage feedback circuit 42 is connected in parallel on discharge and recharge electricity
On road 41, and output voltage feedback circuit 42 is connected to the second output end of three foot control power supply chips, when charge-discharge circuit 41
When the voltage of output is higher or lower than the operating voltage of micro-control unit 6, relay 5 and sensor 7, the voltage is through output voltage
Feedback circuit 42 feeds back to switching power source chip 3, the adjustment of discharge and recharge time is carried out by switching power source chip 3, due to charge and discharge
The size of the output voltage of circuit is relevant with the charging interval, so that the output voltage and micro-control unit of charge-discharge circuit 41
6th, relay 5 is consistent with the operating voltage of sensor 7, it is ensured that the stability of charge-discharge circuit output voltage.
The structured flowchart two of the electric kettle that Fig. 2 is provided for the embodiment of the utility model one.On the basis of above-described embodiment
On, protection module 8 is additionally provided between mains supply 1 and rectification filtering module 2, by setting protection module 8 to prevent from civil power
The curtage of the input of power supply 1 is excessive and cause circuit malfunctions.
Physical circuit figure in the electric kettle that Fig. 3 is provided for the embodiment of the utility model one.Shown in reference picture 3, upper
State on the basis of embodiment, the electric kettle that the utility model is provided is described in detail with reference to specific circuit diagram：
Protection module 8 specifically includes current-limiting resistance 81 and overvoltage absorption resistance 82, the first end of current-limiting resistance 81 and city
The live wire L connections of power supply 1, the second end of current-limiting resistance 81 is connected with the first input end 2a of rectification filtering module 2.By limit
Leakage resistance 81 carries out current limliting, prevents input excessive to the electric current of rectification filtering module 2.The first end of overvoltage absorption resistance 82 with
The live wire L connections of mains supply 1, the second end of overvoltage absorption resistance 82 is connected with the zero line N of mains supply 1.Occurring to beat
Lei Shi, can there is surge voltage, i.e. input voltage in input voltage can uprise suddenly, in order to avoid being input into rectification filtering module
2 voltage is excessive, is sponged surge voltage therein by overvoltage absorption resistance 82, so as to prevent input to rectifying and wave-filtering
Overtension in module, is protected to whole circuit.
Rectification filtering module 2 includes rectifier bridge 21 and filter circuit 22.Wherein, the first input end and civil power of rectifier bridge 21
The live wire L connections of power supply 1, the first output end of rectifier bridge 21 is connected with the zero line N of mains supply 1.Filter circuit 22 includes the
Three electric capacity 221, the electric capacity 223 of inductance 222 and the 4th.Wherein, inductance 222 is colour loop inductance.The first end and rectifier bridge of inductance 222
21 the second output end connection, the second end of inductance 222 is connected with the first end of the 4th electric capacity 223, and the second of the 4th electric capacity 223
End is connected with the first end of the 3rd electric capacity 221, and the second end of the 3rd electric capacity 221 is connected with the first end of inductance 222.Inductance 222
The second end be connected with the input Drain of switching power source chip 3.
Charge-discharge circuit 41 includes first resistor 411, charging inductance 412, the first electric capacity 413, second resistance 414 and first
Diode 415.Wherein, charging circuit includes first resistor 411, charging inductance 412, the first electric capacity 413.Discharge circuit includes filling
Inductance 412, the first electric capacity 413, the diode 415 of second resistance 414 and first.Specifically, the first end of first resistor 411 with
The first output end Cs connections of switching power source chip 3, the second end of first resistor 411 is connected with the first end of charging inductance 412,
Second end of charging inductance 412 is connected to the first tie point a, the second end of the first electric capacity 413 with the first end of the first electric capacity 413
The second tie point b, the second tie point b ground connection, the second end of the first electric capacity 413 are connected to the positive terminal of the first diode 415
It is connected with the second input of rectifier bridge 21.The negative pole end of the first diode 415 is connected with the first end of charging inductance 412.The
The first end of two resistance 414 is connected with the first tie point a, and the second end of second resistance 414 is connected with the second tie point b.Wherein,
Second resistance 414 is in parallel with the first electric capacity 413, charge-discharge circuit can be made more stable, unloaded effect is more preferable.It is of course also possible to
It is not provided with second resistance 414.
Output voltage feedback circuit 42 includes the second diode 421 and the second electric capacity 422.Wherein, second diode 421
Positive terminal is connected with the second end of charging inductance 412, i.e. the positive terminal of the second diode 421 is connected to the first tie point a.The
The negative pole end of two diodes 421 is connected with the second output end Vdd of switching power source chip 3, the first end of the second electric capacity 422 with open
The second output end connection of powered-down source chip 3, the second end of the second electric capacity 422 is connected with the first end of charging inductance 412.
Using the present embodiment electric kettle when, electric kettle is connected with outside mains supply 1, current-limiting resistance 81 and mistake
Voltage absorption resistance 82 carries out current limiting pressure-limiting protection to the alternating current that mains supply 1 is provided.220V is exchanged into electricity output to rectification
Bridge 21, rectifier bridge 21 carries out rectification to it, and the 220V alternating currents are changed into direct current, and 22 pairs of direct currents of filter circuit are filtered
Ripple, the High-frequency Interference in direct current is removed, and is input into switching power source chip 3, then charging circuit conducting, the flow direction of electric current
For：First resistor 411, charging inductance 412, the first electric capacity 413 are flow to from the first output end Cs of switching power source chip 3, then
Electric current flow to the second input of rectifier bridge 21 from the second end of the first electric capacity 413, a loop is formed, to charging inductance 412
Charge.During electric discharge, charging inductance 412 discharges, and the flow direction of electric current is charging inductance 412, the first electric capacity 413, the first diode
415, or from charging inductance 412 to second resistance 414, the first diode 415, so as to form a loop.By charge and
Electric discharge alternately, realizes the conversion to input voltage, the output end of charge-discharge circuit is exported a job for stabilization
Voltage, the operating voltage is the operating voltage of micro-control unit 6, relay 5 and sensor 7.In the present embodiment, discharge and recharge electricity
The voltage of the output of road 41 is 5V.If the output voltage of charge-discharge circuit 41 is higher or lower than 5V, due to output voltage feedback
The presence of circuit 42, output voltage feedback circuit 42 by the Voltage Feedback to switching power source chip 3, by switching power source chip
3 pairs of voltages are adjusted, by the output voltage stabilization of charge-discharge circuit 41 in 5V.Exemplary, when charge-discharge circuit 41
Output voltage be 5.5V when, output voltage feedback circuit 42 passes through the Voltage Feedback to the Vdd terminal of switching power source chip 3
Switching power source chip 3 adjusts charging duty cycle, i.e. charging interval.Because the output voltage of charge-discharge circuit 41 has with the charging interval
Close, the charging interval is more long, and the output voltage of charge-discharge circuit is higher, and the charging interval is shorter, and the output voltage of charge-discharge circuit is got over
It is small.Operating voltage 5V due to output voltage 5.5V higher than micro-control unit 6, relay 5 and sensor 7, therefore, by switch
Power supply chip 3 adjusts charging duty cycle, reduces to charging interval of charging inductance 412, so as to by the output of charge-discharge circuit 41
Voltage is reduced to 5V.When the output voltage of charge-discharge circuit 41 is 4.8V, then output voltage feedback circuit 42 is anti-by the voltage
The Vdd terminal of switching power source chip 3 is fed to, charging duty cycle is adjusted by switching power source chip 3, that is, extended to charging inductance 412
Charging interval, the output voltage of charge-discharge circuit 41 is increased to 5V so that the output voltage of charge-discharge circuit 41 with it is micro-
Control unit 6, relay 5 are consistent with the operating voltage of sensor 7, make charge-discharge circuit 41 be micro-control unit 6, relay 5
With the operating voltage that sensor 7 provides stabilization.
The electric kettle that the present embodiment is provided, mains supply is provided 220V AC rectifications by rectification filtering module
It is direct current, and High-frequency Interference removal is carried out to the direct current, under the control of switching power source chip, exports charge-discharge circuit
The voltage consistent with the operating voltage of micro-control unit, relay and sensor, thus simultaneously for micro-control unit, relay and
Sensor power.Additionally, in order that the output voltage stabilization of charge-discharge circuit, by setting output voltage feedback circuit, when filling
When the output voltage of discharge circuit deviates the operating voltage of micro-control unit, relay and sensor, output voltage is set to feed back electricity
Road adjusts charging duty cycle by the Voltage Feedback to switching power source chip by switching power source chip, that is, adjust to the electricity that charges
The charging interval of sense, so that the output voltage of charge-discharge circuit keeps stabilization, it is micro-control unit 6, relay 5 and sensor
7 operating voltages that stabilization is provided.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (9)
1. a kind of electric kettle, it is characterised in that including：Rectification filtering module (2), switching power source chip (3) and voltage conversion
Module (4)；
The first input end (2a) of the rectification filtering module (2) is connected with the live wire (L) of mains supply (1), the rectification filter
First output end (2b) of ripple module (2) is connected with the zero line (N) of the mains supply (1), the rectification filtering module (2)
Second output end (2c) is connected with the input of the switching power source chip (3), the voltage transformation module (4) respectively with it is described
Second input (2d) connection of the output end and the rectification filtering module (2) of switching power source chip (3)；
The rectification filtering module (2) carries out rectification and filters, the voltage for the output voltage to the mains supply (1)
Modular converter (4) is micro-control unit (6) for the voltage conversion that exports the switching power source chip (3), relay (5) and
The operating voltage of sensor (7), wherein, the work of the micro-control unit (6), the relay (5) and the sensor (7)
Voltage is identical.
2. electric kettle according to claim 1, it is characterised in that the voltage transformation module (4) includes：Discharge and recharge electricity
Road (41), the charge-discharge circuit (41) respectively with the output end and the rectification filtering module of the switching power source chip (3)
(2) the second input (2d) connection.
3. electric kettle according to claim 2, it is characterised in that the switching power source chip (3) is three foot controls electricity
Source chip, the charge-discharge circuit (41) is connected to the first output end of the switching power source chip (3).
4. electric kettle according to claim 3, it is characterised in that the voltage transformation module (4) also includes：Output electricity
Pressure feedback circuit (42), the output voltage feedback circuit (42) is connected to the second output end of the switching power source chip (3),
And the output voltage feedback circuit (42) is connected in parallel on the charge-discharge circuit (41).
5. electric kettle according to claim 4, it is characterised in that the charge-discharge circuit (41) includes：First resistor
(411), charging inductance (412), the first electric capacity (413) and the first diode (415)；
The first end of the first resistor (411) is connected with the first output end of the switching power source chip (3), first electricity
The second end for hindering (411) is connected with the first end of the charging inductance (412), the second end of the charging inductance (412) and institute
State the first end connection of the first electric capacity (413), the second end of first electric capacity (413) respectively with the rectification filtering module
(2) the positive terminal connection of the second input (2d) and first diode (415), and first electric capacity (413) the
Two ends are grounded, and the negative pole end of first diode (415) is connected with the first end of the charging inductance (412).
6. electric kettle according to claim 5, it is characterised in that the output voltage feedback circuit (42) includes：The
Two diodes (421) and the second electric capacity (422)；
The positive terminal of second diode (421) is connected with the second end of the charging inductance (412), second diode
(421) negative pole end is connected with the second output end of the switching power source chip (3), the first end of second electric capacity (422)
The second output end with the switching power source chip (3) is connected, the second end of second electric capacity (422) and the charging inductance
(412) first end connection.
7. the electric kettle according to any one of claim 1 to 6, it is characterised in that also include：It is connected to the civil power electricity
Protection module (8) between source (1) and the rectification filtering module (2).
8. electric kettle according to claim 7, it is characterised in that the protection module (8) includes：Current-limiting resistance (81)
With overvoltage absorption resistance (82)；
The first end of the current-limiting resistance (81) is connected with the live wire of the mains supply (1), and the of the current-limiting resistance (81)
Two ends are connected with the first input end (2a) of the rectification filtering module (2)；
The first end of the overvoltage absorption resistance (82) is connected with the live wire of the mains supply (1), and the overvoltage absorbs
Second end of resistance (82) is connected with the zero line of the mains supply (1).
9. the electric kettle according to any one of claim 1 to 6, it is characterised in that rectification filtering module (2) bag
Include：Rectifier bridge (21) and filter circuit (22)；
The first input end of the rectifier bridge (21) is connected with the live wire (L) of the mains supply (1), the rectifier bridge (21)
First output end is connected with the zero line (N) of the mains supply (1), the second output end of the rectifier bridge (21) and the filtering
The input connection of circuit (22), the output end of the filter circuit (22) connects with the input of the switching power source chip (3)
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093441.1U CN206303723U (en) | 2016-09-29 | 2016-09-29 | Electric heating kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093441.1U CN206303723U (en) | 2016-09-29 | 2016-09-29 | Electric heating kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206303723U true CN206303723U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621093441.1U Expired - Fee Related CN206303723U (en) | 2016-09-29 | 2016-09-29 | Electric heating kettle |
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| Country | Link |
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| CN (1) | CN206303723U (en) |
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2016
- 2016-09-29 CN CN201621093441.1U patent/CN206303723U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 |
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| CF01 | Termination of patent right due to non-payment of annual fee |