CN106877288A - Electric kettle controls circuit and electric kettle base - Google Patents
Electric kettle controls circuit and electric kettle base Download PDFInfo
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- CN106877288A CN106877288A CN201710259386.1A CN201710259386A CN106877288A CN 106877288 A CN106877288 A CN 106877288A CN 201710259386 A CN201710259386 A CN 201710259386A CN 106877288 A CN106877288 A CN 106877288A
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- Prior art keywords
- circuit
- master control
- electric kettle
- water
- control borad
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
- A47J27/21158—Devices to detect overheating or boiling with a single control element or unit
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21166—Constructional details or accessories
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Cookers (AREA)
Abstract
The invention provides a kind of electric kettle control circuit and electric kettle base, it is related to the technical field of controlling intelligent household appliances, wherein, electric kettle control circuit includes master control borad, and water detection circuit, power circuit, the power output switch being connected with the master control borad respectively；The power circuit is the master control borad, water detection circuit, power output switch power supply；The water detects circuit transmission water information of voltage to the master control borad；The master control borad controls the power output switch conduction or disconnection according to the water information of voltage.What the present invention alleviated that electric kettle of the prior art control circuit is present can not prejudge whether dry combustion method, and then can not deenergization, the technical problem of the service life of influence electric kettle in time.
Description
Technical field
The present invention relates to controlling intelligent household appliances technical field, circuit and electric kettle bottom are controlled more particularly, to a kind of electric kettle
Seat.
Background technology
The small household appliances such as electric kettle have turned into people's frequency of use household electrical appliances higher in daily life, because it has user
Just and the advantages of heat fast, recent commercially popularization and have developed rapidly.When water dry combustion method, if be not controlled by, will
Cause electric kettle to burn out, or even cause fire, therefore, general domestic electric heating kettle all has the attemperating unit of control temperature.
In the prior art, electric kettle control circuit is normally applied temperature controller, and when there is dry combustion method, temperature can be very high, and one
As can more than 100 degrees Celsius.When the temperature value that temperature controller is detected exceedes preset value, can deenergization.But it is this
Mode reaction speed is slower, after only there is dry combustion method, just can deenergization, the service life of influence electric kettle.
Therefore, electric kettle of the prior art control circuit can not prejudge whether dry combustion method, and then can not disconnect in time
Power supply, influences the service life of electric kettle.
The content of the invention
In view of this, it is existing to alleviate it is an object of the invention to provide a kind of electric kettle control circuit and electric kettle base
With the presence of the electric kettle control circuit in technology can not prejudge whether dry combustion method, and then can not deenergization in time, influence
The technical problem of the service life of electric kettle.
In a first aspect, the embodiment of the invention provides a kind of electric kettle control circuit, including master control borad, and respectively with institute
State water detection circuit, power circuit, the power output switch of master control borad connection；
The power circuit is the master control borad, water detection circuit, power output switch power supply；
The water detects circuit transmission water information of voltage to the master control borad；
The master control borad controls the power output switch conduction or disconnection according to the water information of voltage.
With reference in a first aspect, the embodiment of the invention provides the first possible implementation method of first aspect, wherein, institute
Stating water detection circuit includes water divider resistance, water resistance and water filter capacitor；
The first end of the water divider resistance connects the power circuit, the second end connection of the water divider resistance
The first end of the water filter capacitor, the master control borad, the second end ground connection of the water filter capacitor；The water filtering
Electric capacity and the water resistor coupled in parallel.
With reference in a first aspect, the embodiment of the invention provides second possible implementation method of first aspect, wherein, also
Including temperature sensing circuit, the temperature sensing circuit is connected with the master control borad, the power circuit, the temperature detection electricity
Transmit temperature detection amount to the master control borad in road.
With reference to second possible implementation method of first aspect, the third of first aspect is the embodiment of the invention provides
Possible implementation method, wherein, the temperature sensing circuit includes temperature divider resistance, thermistor and temperature filter capacitor；
The first end of the temperature divider resistance connects the power circuit, the second end connection of the temperature divider resistance
The first end of the temperature filter capacitor, the master control borad, the second end ground connection of the temperature filter capacitor；The temperature filtering
Electric capacity is in parallel with the thermistor.
With reference to second possible implementation method of first aspect, the 4th kind of first aspect is the embodiment of the invention provides
Possible implementation method, wherein, also including power adjustment unit, the power adjustment unit includes zero cross detection circuit and power
Regulation circuit；
The power circuit is that the zero cross detection circuit and the power conditioning circuitry are powered；
The zero cross detection circuit is connected with the AC signal output interface of the power circuit, and the power circuit is institute
State zero cross detection circuit and detection signal is provided；The zero cross detection circuit is also connected with the master control borad, and transmission level information is extremely
The master control borad；
The power conditioning circuitry is connected with the master control borad, adjusts power output size.
With reference in a first aspect, the embodiment of the invention provides the 5th kind of possible implementation method of first aspect, wherein, also
Including indicator light circuit, the indicator light circuit includes multiple LED lights and switching tube；
The LED light is connected by the switching tube with the master control borad；The power circuit is the indicator lamp
Circuit is powered.
With reference to any one possible implementation method of first aspect, the 6th kind of first aspect is the embodiment of the invention provides
Possible implementation method, wherein, also including the warning circuit being connected with the master control borad, the warning circuit includes buzzer；
The power circuit is powered for the warning circuit.
Second aspect, the embodiment of the present invention also provides a kind of electric kettle base, including base housing and such as first aspect
Any one embodiment described in electric kettle control circuit, electric kettle control circuit is arranged at the interior of the base housing
Portion.
With reference to second aspect, the first possible implementation method of second aspect is the embodiment of the invention provides, wherein, it is many
The individual LED light is circumferentially arranged in the base housing；The material of the base housing is china；The base shell
The side wall of body is provided with power supply line three-way hole.
With reference to the first possible implementation method of second aspect, second of second aspect is the embodiment of the invention provides
Possible implementation method, wherein, the master control borad includes PWM circuit, the PWM circuit and the indicator light circuit
Connection, controls the shading value change of the LED light.
The embodiment of the present invention brings following beneficial effect：
In the embodiment that the present invention is provided, electric kettle control circuit includes master control borad, and is connected with master control borad respectively
Water detection circuit, power circuit, power output switch；Wherein, the power circuit is master control borad, water detection circuit, work(
Rate output switch is powered；Water detects circuit transmission water information of voltage to master control borad；Master control borad is according to the water information of voltage
Control power output switch conduction or disconnection.In the embodiment that the present invention is provided, when in water detection electric circuit inspection to electric kettle
Water be less than predetermined threshold value when, by master control borad control power output switch off, so as to reach prejudge whether dry combustion method and
When deenergization purpose.Therefore, the present invention alleviates can not sentencing in advance for electric kettle control circuit presence of the prior art
It is disconnected whether dry combustion method, and then can not deenergization, the technical problem of the service life of influence electric kettle in time.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that electric kettle provided in an embodiment of the present invention controls circuit；
Fig. 2 is switching power circuit figure provided in an embodiment of the present invention；
Fig. 3 is that water provided in an embodiment of the present invention detects circuit diagram and temperature sensing circuit figure；
Fig. 4 is master control borad pinouts provided in an embodiment of the present invention；
Fig. 5 is zero cross detection circuit figure provided in an embodiment of the present invention；
Fig. 6 is power conditioning circuitry figure provided in an embodiment of the present invention；
Fig. 7 is indicator light circuit figure provided in an embodiment of the present invention；
Fig. 8 is warning circuit figure provided in an embodiment of the present invention；
Fig. 9 is base shell structure figure provided in an embodiment of the present invention.
Icon：
100- master control borads；200- waters detect circuit；300- power outputs are switched；400- power circuits；ZERO- zero passages are examined
The output end of slowdown monitoring circuit；ZERO_T- detection signal output interfaces；The input of CTRL- power conditioning circuitries；LED1- indicator lamps
The input of circuit；The input of BELL- warning circuits；50- base housings；510- power supply line three-way holes.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Electric kettle control circuit in currently available technology can not prejudge whether dry combustion method, and then can not in time disconnect electricity
Source, influences the service life of electric kettle.Based on this, a kind of electric kettle control circuit and electric kettle bottom provided in an embodiment of the present invention
Seat, when the water in water detection electric circuit inspection to electric kettle is less than predetermined threshold value, is switched by master control borad control power output
Disconnect, so as to reach prejudge whether dry combustion method, timely deenergization purpose.Therefore, the present invention is alleviated in the prior art
Electric kettle control circuit exist can not prejudge whether dry combustion method, and then can not deenergization in time, influence electric kettle
The technical problem of service life.
For ease of understanding the present embodiment, circuit is controlled to a kind of electric kettle disclosed in the embodiment of the present invention first
Describe in detail.
Embodiment one：
Fig. 1 shows that electric kettle provided in an embodiment of the present invention controls the structural representation of circuit.As shown in figure 1, the electricity
Hot kettle control circuit includes master control borad 100, and the water detection circuit 200, power circuit being connected with the master control borad 100 respectively
400th, power output switch 300.
Wherein, power circuit 400 is that master control borad 100, water detection circuit 200, power output switch 300 is powered.Specifically
Ground, power circuit 400 can be linear power supply, Switching Power Supply, it is contemplated that Switching Power Supply can obtain more stable output electricity
Pressure, the preferred Switching Power Supply of the present embodiment, Switching Power Supply can be designed according to any one conventional Switching Power Supply, and Fig. 2 shows this
The switching power circuit figure that inventive embodiments are provided.
Specifically, in one embodiment, power output switch 300 can be, but not limited to be relay, controllable silicon, three poles
Pipe, any one in FET.Master control borad 100 can select have multiple AD (Analog-Digital, analog to digital) defeated
Enter the single-chip microcomputer of pin.Water detection circuit 200 transmits an AD input pin of water information of voltage to master control borad 100.It is main
Control plate 100 judges whether the water level in the electric kettle is too low according to the water information of voltage, if so, then control power output is opened
Close 300 to disconnect, if it is not, then control power output switch 300 is turned on.Specifically, water is conductive, different water levels in electric kettle
Water, produce different size of water resistance, the different water information of voltage of different water resistance correspondences, such that it is able to basis
Water information of voltage judges the water in electric kettle.
The electric kettle control circuit that the present invention is provided, including master control borad, and the water detection being connected with master control borad respectively
Circuit, power circuit, power output switch；Wherein, the power circuit is master control borad, water detection circuit, power output switch
Power supply；Water detects circuit transmission water information of voltage to master control borad；Master control borad controls power defeated according to the water information of voltage
Go out switch conduction or disconnection.In the embodiment that the present invention is provided, when the water in water detection electric circuit inspection to electric kettle is less than
During predetermined threshold value, by master control borad control power output switch off, so as to reach prejudge whether dry combustion method, timely deenergization
Purpose.Therefore, what the present invention alleviated that electric kettle of the prior art control circuit is present can not prejudge whether dry combustion method,
And then can not deenergization in time, influence the problem of the service life of electric kettle.Meanwhile, compared in the prior art using one
Or multiple pressure sensors carry out anhydrous detection, the embodiment that the present invention is provided can reduce electric kettle base volume, reduce
Electric kettle production cost.
Further, in order to detect the temperature in electric kettle, above-mentioned electric kettle control circuit also includes temperature detection
Circuit, the temperature sensing circuit is connected with master control borad 100, power circuit 400, and temperature sensing circuit transmission temperature detection amount is extremely
Master control borad 100.Specifically, master control borad 100 judges the temperature of water in electric kettle according to temperature detection amount.
Further, Fig. 3 shows water detection circuit and temperature sensing circuit provided in an embodiment of the present invention, and Fig. 4 shows
Master control borad pinouts provided in an embodiment of the present invention is gone out.As shown in Figure 3, Figure 4, water detection circuit 200 includes water point
Piezoresistance RJ2, water resistance R19 and water filter capacitor C7, the 1st pin connection power circuit 400 of master control borad 100.The water
The first end connection power circuit 400 of amount divider resistance RJ2, the power circuit 400 is that water detection circuit 200 provides 5V direct currents
Power supply.Second end of water divider resistance RJ2 connects first end, the 6th pin of master control borad 100, water of water filter capacitor C7
The second end ground connection of amount filter capacitor C7, water filter capacitor C7 is in parallel with water resistance R19.Wherein, by master control borad 100 and water
The tie point of amount detection circuit 200 is named as SW_AD points.Water filter capacitor C7 is used to filter high-frequency harmonic, water electricity
It is resistance that water in electric kettle is produced to hinder, and when water level is higher in electric kettle, water resistance is smaller, when in electric kettle water level compared with
When low or anhydrous, water resistance is larger.In view of the conduction of a variety of water sources such as distilled water, mineral water, running water etc.
Performance, the resistance of water divider resistance RJ2 is preferably 39K Ω, the water divider resistance RJ2 and water resistance R19 of such 39K Ω
Partial pressure, can be good at telling the water situation in electric kettle.
Specifically, the voltage at SW_AD points is water information of voltage, as the SW_ that the 6th pin of master control borad 100 is received
When voltage at AD points is more than predetermined voltage threshold, determines that the water level in electric kettle is too low or be zero, and control power output
Switch 300 disconnects, so as to effectively prevent dry combustion method phenomenon from occurring.In addition, frequently being disconnected with electric kettle base to eliminate electric kettle
Or connection causes water to detect the damage of circuit 200, only when electric kettle is placed into electric kettle base, in detection electric kettle
Water how much.
Further, as shown in Figure 3, Figure 4, the temperature sensing circuit includes temperature divider resistance RJ1, thermistor R17
With temperature filter capacitor C6.The first end connecting valve power supply of temperature divider resistance RJ1, Switching Power Supply is temperature sensing circuit
5V dc sources are provided.The first end of the second end connection temperature filter capacitor C6 of temperature divider resistance RJ1, master control borad 100
7th pin, the second end ground connection of temperature filter capacitor C6, temperature filter capacitor C6 is in parallel with thermistor R17.Wherein, by master
Control plate 100 is named as WD_AD points with the tie point of temperature sensing circuit.Temperature filter capacitor C6 is used to filter high-frequency harmonic,
Thermistor R17 changes, different water temperatures with the height of water temperature in electric kettle, the different resistance of thermistor R17 correspondences
Value.In view of the excursion of thermistor, the resistance of temperature divider resistance RJ1 is preferably 10K Ω, the temperature of such 10K Ω
Divider resistance RJ1 and thermistor R17 partial pressures, can be good at telling the water temperature condition of water in electric kettle.
Specifically, the voltage at the WD_AD points that the 7th pin of master control borad 100 is received in the first Preset Time
When producing very low range to fluctuate, it is determined that now the water temperature of water has reached boiling point in electric kettle, and controls power output to switch
300 disconnect, so as to effectively prevent the generation of superheated phenomenon.Wherein, above-mentioned first Preset Time, very low range can bases
Actual conditions pre-set.So, the electric kettle for being provided using the present embodiment controls the electric kettle of circuit, in different altitude height
Whether water that can be in automatic decision electric kettle is boiled, more accurate compared to the method judged using steam in conventional art.
Further, the voltage at the WD_AD points that the 7th pin of master control borad 100 is received in the second Preset Time
When changing value is not above default changing value, user's long time no operations are confirmed, and control power output to switch 300 disconnections.Tool
Body ground, when user carry kettle operation will electric kettle separated from base when, or user in electric kettle add cold water when, meeting
The voltage acute variation at WD_AD points is caused, if being in the second Preset Time, not detect at WD_AD points in long-time
Voltage acute variation, then it is assumed that user's long time no operations, disconnects power output automatically.Wherein, the second Preset Time, default change
Change value can pre-set according to actual conditions.
Further, above-mentioned electric kettle control circuit also includes power adjustment unit, and the power adjustment unit includes zero passage
Detection circuit and power conditioning circuitry.Power circuit 400 is that zero cross detection circuit and power conditioning circuitry are powered.Zero passage detection electricity
Road is connected with the AC signal output interface of power circuit 400, and power circuit 400 provides detection signal for zero cross detection circuit.
Zero cross detection circuit is also connected with master control borad 100, transmission level information to master control borad 100, power conditioning circuitry and master control borad 100
Connection, adjusts power output size.
Specifically, in one embodiment, Fig. 5 shows zero cross detection circuit figure provided in an embodiment of the present invention, and Fig. 6 shows
Power conditioning circuitry figure provided in an embodiment of the present invention is gone out.As shown in Figure 5, Figure 6, power circuit 400 is zero cross detection circuit
5V dc sources are provided with power conditioning circuitry.
The input of zero cross detection circuit is connected with the detection signal output interface ZERO_T of power circuit 400, power supply electricity
Road 400 provides detection signal for zero cross detection circuit.The output end ZERO of zero cross detection circuit the 4th drawing also with master control borad 100
Pin is connected, the zero cross detection circuit transmission level information to master control borad 100.Specifically, as shown in Figure 1, Figure 4, Figure 5, the detection
Signal is pulsating dc voltage, and when the pulsating dc voltage is 0V, chip IC 4 is linear optical coupling cut-off, and triode Q1 ends, this
When zero cross detection circuit output end ZERO output high level.When pulsating dc voltage rises to be not zero, linear optical coupling is led
Logical, triode Q1 is turned on, now the output end ZERO output low levels of zero cross detection circuit.Because one of pulsating dc voltage
In cycle, the linear optical coupling most of the time is in the conduction state, so zero passage high level signal is a very narrow rectangular pulse,
After 4th pin of master control borad 100 receives the rectangular pulse, the time occurred according to the rectangular pulse controls power output.
Wherein linear optical coupling can select any one in PC817, EL817 or TLP781, preferred PC817 in the present embodiment, application
Linear optical coupling realizes strong and weak electric isolution, improves circuit safety.
Further, in one embodiment, as shown in Fig. 4, Fig. 6, the input CTRL of power conditioning circuitry and master control
3rd pin of plate 100 is connected, the time tranfer control signal according to the appearance of above-mentioned rectangular pulse to power conditioning circuitry.In order to
Strong and weak electric isolution is realized, circuit safety is improved, photoelectrical coupler is applied in the power conditioning circuitry, wherein the photoelectric coupling
Device can be MOC3020, MOC3021, any one in MOC3022, the preferred MOC3021 of the present embodiment.Passed by master control borad 100
Defeated control signal, using the working condition of photoelectrical coupler MOC3021 triggering control controllable silicons TR1, so as to reach control work(
The purpose of rate output.
Further, the 7th pin of master control borad 100 judges voltage correspondence according to the voltage at the WD_AD points for receiving
Temperature value, if now temperature value reaches preset temperature value, master control borad 100 transmits control information to power conditioning circuitry, subtracts
Small-power is exported.As the continuation of temperature is raised, controlled output power progressively reduces, and is to work as WD_AD until temperature reaches boiling point
The voltage at point place is in the first Preset Time when only there is the change of very low range, it is automatic disconnect power output switch 300 or
Controlled output power is maintained at Low threshold, and the Low threshold can pre-set according to actual conditions, and now controllable silicon TR1 is suitable
300 are switched in power output.So, the hypervolia in electric kettle can be effectively prevented, occurs showing for spilling during heating up water
As.
Further, in order to the working condition to electric kettle makes instruction, above-mentioned electric kettle control circuit also includes indicating
Circuit for lamp, the indicator light circuit includes multiple LED (Light Emitting Diode, light emitting diode) indicator lamps and switch
Pipe, wherein LED light is connected by switching tube with master control borad 100, and power circuit 400 is powered for indicator light circuit.
Specifically, the plurality of LED light is multigroup LED light group in parallel, and every group of LED light group is multiple LED lights
It is end to end to be cascaded, the input connection power circuit 400 of LED light group, output end connecting valve pipe.In an implementation
In example, Fig. 7 shows indicator light circuit figure provided in an embodiment of the present invention.As shown in Fig. 1, Fig. 4, Fig. 7, power circuit 400 is
The indicator light circuit provides 12V dc sources, and the input LED1 of the indicator light circuit is connected with the 5th pin of master control borad 100,
Thus master control borad 100 can control the working condition of indicator light circuit.Preferably two groups LED light groups of the present embodiment are in parallel, each LED
Lamp group includes three LED lights, switching tube Q3 selection triodes.
Further, in order to the operation irregularity situation to electric kettle is alarmed, above-mentioned electric kettle control circuit also includes
The warning circuit being connected with master control borad 100.In one embodiment, Fig. 8 shows warning circuit provided in an embodiment of the present invention
Figure.As shown in Fig. 1, Fig. 4, Fig. 8, the 2nd pin of master control borad 100 connects the input BELL of the warning circuit, power circuit 400
For warning circuit provides 5V dc sources.The warning circuit includes buzzer BZ1 and electrochemical capacitor CE5, the of buzzer BZ1
One end connects power circuit 400, and second end of buzzer BZ1 connects the anode of electrochemical capacitor CE5, the negative electrode of electrochemical capacitor CE5
Connect the 2nd pin of master control borad 100.Specifically, master control borad 100 is sentenced according to the voltage at WD_AD points, the voltage at SW_AD points
It is disconnected that whether whether situations such as having enough waters in boiling point, electric kettle reached, so as to control warning circuit to alarm.
In the embodiment that the present invention is provided, electric kettle control circuit includes master control borad, and is respectively connected with master control borad
Water detection circuit, power circuit, power output switch；Wherein, the power circuit is master control borad, water detection circuit, power
Output switch is powered；Water detects circuit transmission water information of voltage to master control borad；Master control borad is according to the water information of voltage control
Power output switch conduction processed or disconnection.In the embodiment that the present invention is provided, when in water detection electric circuit inspection to electric kettle
Water be less than predetermined threshold value when, by master control borad control power output switch off, so as to reach prejudge whether dry combustion method, in time
The purpose of deenergization.Therefore, the embodiment that the present invention is provided alleviates what electric kettle control circuit of the prior art was present
Can not prejudge whether dry combustion method, and then can not deenergization in time, influence the problem of the service life of electric kettle.Meanwhile, phase
Compared with anhydrous detection is carried out using one or more pressure sensor in the prior art, the embodiment that the present invention is provided can subtract
Small electric kettle base volume, reduces electric kettle production cost.
Embodiment two：
The present embodiment proposes a kind of electric kettle base, and the electric kettle base includes base housing and as in embodiment one
Electric kettle control circuit, electric kettle control circuit is arranged at the inside of base housing.Fig. 9 shows that the embodiment of the present invention is carried
The base shell structure figure of confession.As shown in figure 9, the side wall of the base housing 50 is provided with power supply line three-way hole 510.
Further, multiple LED lights of indicator light circuit are arranged in base housing 50 in electric kettle control circuit.
Specifically, the material of the base housing 50 is translucent material, can be, but not limited to be glass, china, plastics.The LED is indicated
The color of lamp can be random color, can be, but not limited to be red, green, blueness, warm white, yellow.
Further, the master control borad 100 in electric kettle control circuit includes PWM (Pulse WidthModulation, arteries and veins
Rush width modulated) modulation circuit, the PWM circuit is connected with indicator light circuit, controls the shading value change of LED light.
Specifically, the PWM circuit is preferably 8 PWM circuits, it is possible thereby to produce 255 grades of PWM waveforms pair
LED light circuit is controlled, and master control borad 100 transmits pwm control signal to indicator light circuit, so as to realize indicating LED
The shading value change of lamp.
Preferably, the material of the base housing 50 is preferably china, and LED light is preferably warm white, and in base shell
In body 50, prolong the circumferential edges of base housing 50, circumferentially arrange, thus using the permeability of china material, LED light
Light can pass through china material, so that base housing 50 shows amber firefly effect.The LED light is in circle
Week arrangement can make it is seen that the brightness of china printing opacity evenly.
In addition, master control borad 100 can also control LED light according to the voltage at WD_AD points, the voltage at SW_AD points
Bright change.When such as, according to having enough waters in the voltage detecting at SW_AD points to electric kettle, power output switch 300
It is conducting state, electric kettle normal heating, now by the make-and-break time of PWM circuit controling switch pipe Q3 so that LED refers to
Show that the brightness of lamp constantly flashes change, and then cause that base housing 50 shows amber firefly effect；When according to SW_AD
Point place voltage detecting to electric kettle in water shortage or it is anhydrous when, LED light does not work, now power output switch
300 is off-state.When the water in voltage detecting to electric kettle at according to WD_AD points reaches boiling point, LED light is no longer
Flicker, in the illuminating state that shading value is constant, now power output switch 300 is broken as off-state.
The present invention is provided in embodiment, and electric kettle control circuit includes master control borad, and the water being connected with master control borad respectively
Amount detection circuit, power circuit, power output switch；Wherein, the power circuit is defeated master control borad, water detection circuit, power
Go out switch power supply；Water detects circuit transmission water information of voltage to master control borad；Master control borad is controlled according to the water information of voltage
Power output switch conduction or disconnection.In the embodiment that the present invention is provided, the water in water detection electric circuit inspection to electric kettle
When amount is less than predetermined threshold value, switched off by master control borad control power output, so as to reach prejudge whether dry combustion method, disconnected in time
The purpose of switch power supply.Therefore, the embodiment that the present invention is provided alleviates electric kettle control circuit of the prior art to be present not
Can prejudge whether dry combustion method, and then can not deenergization in time, influence the problem of the service life of electric kettle.Meanwhile, compare
In anhydrous detection is carried out using one or more pressure sensor in the prior art, the embodiment that the present invention is provided can reduce
Electric kettle base volume, reduces electric kettle production cost.
Electric kettle base provided in an embodiment of the present invention, has identical with the electric kettle control circuit that above-described embodiment is provided
Technical characteristic, so can also solve identical technical problem, reach identical technique effect.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the electric heating of foregoing description
The specific work process of kettle base, may be referred to the corresponding process in foregoing electric kettle control circuit embodiments, no longer go to live in the household of one's in-laws on getting married herein
State.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Embodiment described above, specific embodiment only of the invention, is used to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of embodiment of the present invention technical scheme, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of electric kettle controls circuit, it is characterised in that including master control borad, and the water being connected with the master control borad respectively
Detection circuit, power circuit, power output switch；
The power circuit is the master control borad, water detection circuit, power output switch power supply；
The water detects circuit transmission water information of voltage to the master control borad；
The master control borad controls the power output switch conduction or disconnection according to the water information of voltage.
2. electric kettle according to claim 1 controls circuit, it is characterised in that the water detection circuit includes water point
Piezoresistance, water resistance and water filter capacitor；
The first end of the water divider resistance connects the power circuit, and the second end connection of the water divider resistance is described
The first end of water filter capacitor, the master control borad, the second end ground connection of the water filter capacitor；The water filter capacitor
With the water resistor coupled in parallel.
3. electric kettle according to claim 1 controls circuit, it is characterised in that also including temperature sensing circuit, the temperature
Degree detection circuit be connected with the master control borad, the power circuit, and temperature sensing circuit transmission temperature detection amount is to described
Master control borad.
4. electric kettle according to claim 3 controls circuit, it is characterised in that the temperature sensing circuit includes temperature point
Piezoresistance, thermistor and temperature filter capacitor；
The first end of the temperature divider resistance connects the power circuit, and the second end connection of the temperature divider resistance is described
The first end of temperature filter capacitor, the master control borad, the second end ground connection of the temperature filter capacitor；The temperature filter capacitor
It is in parallel with the thermistor.
5. electric kettle according to claim 3 controls circuit, it is characterised in that also including power adjustment unit, the work(
Rate adjustment unit includes zero cross detection circuit and power conditioning circuitry；
The power circuit is that the zero cross detection circuit and the power conditioning circuitry are powered；
The zero cross detection circuit is connected with the AC signal output interface of the power circuit, and the power circuit is the mistake
Zero detection circuit provides detection signal；The zero cross detection circuit is also connected with the master control borad, and transmission level information is to described
Master control borad；
The power conditioning circuitry is connected with the master control borad, adjusts power output size.
6. electric kettle according to claim 1 controls circuit, it is characterised in that also including indicator light circuit, the instruction
Circuit for lamp includes multiple LED lights and switching tube；
The LED light is connected by the switching tube with the master control borad；The power circuit is the indicator light circuit
Power supply.
7. according to claim any one of 1-6 electric kettle control circuit, it is characterised in that also including with the master control borad
The warning circuit of connection, the warning circuit includes buzzer；The power circuit is powered for the warning circuit.
8. a kind of electric kettle base, it is characterised in that the electricity including base housing and as described in any one of claim 1 to 7
Hot kettle controls circuit, the electric kettle control circuit to be arranged at the inside of the base housing.
9. electric kettle base according to claim 8, it is characterised in that multiple LED lights are in the base shell
Circumferentially arrange in vivo；The material of the base housing is china；The side wall of the base housing is provided with power supply line three-way hole.
10. electric kettle base according to claim 9, it is characterised in that the master control borad includes PWM circuit, institute
State PWM circuit to be connected with the indicator light circuit, control the shading value change of the LED light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259386.1A CN106877288A (en) | 2017-04-19 | 2017-04-19 | Electric kettle controls circuit and electric kettle base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259386.1A CN106877288A (en) | 2017-04-19 | 2017-04-19 | Electric kettle controls circuit and electric kettle base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106877288A true CN106877288A (en) | 2017-06-20 |
Family
ID=59162878
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710259386.1A Pending CN106877288A (en) | 2017-04-19 | 2017-04-19 | Electric kettle controls circuit and electric kettle base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106877288A (en) |
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| CN107560189A (en) * | 2017-10-24 | 2018-01-09 | 苏州经贸职业技术学院 | A kind of gas heater device and intelligent constant-temperaturecontrol control |
| CN108107950A (en) * | 2018-01-30 | 2018-06-01 | 江苏信息职业技术学院 | New power hot-water bottle |
| CN111984038A (en) * | 2019-05-23 | 2020-11-24 | 佛山市顺德区美的电热电器制造有限公司 | Hot water treatment device and water yield control method and device thereof |
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