CN207186531U - Drive circuit, electromagnetic exhaust valve and cooking apparatus - Google Patents
Drive circuit, electromagnetic exhaust valve and cooking apparatus Download PDFInfo
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- CN207186531U CN207186531U CN201720271247.6U CN201720271247U CN207186531U CN 207186531 U CN207186531 U CN 207186531U CN 201720271247 U CN201720271247 U CN 201720271247U CN 207186531 U CN207186531 U CN 207186531U
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Abstract
The utility model provides a kind of drive circuit, electromagnetic exhaust valve and cooking apparatus, wherein, drive circuit includes：Perceptual component, the first end of perceptual component are connected to the output end of drive signal, and the second end of perceptual component is connected to load input terminal；First electrochemical capacitor, the positive terminal of the first electrochemical capacitor are connected to the second end of perceptual component, and the negative pole end of the first electrochemical capacitor is grounded, wherein, the dutycycle positive correlation of the load voltage and drive signal of load input terminal.Pass through technical solutions of the utility model, sound prompting is carried out before exhaust, and the opening degree of electromagnetic exhaust valve is adjusted by small and big, the exhaust sound of control electromagnetic exhaust valve changes from weak to strong, allowing user to predict electric pressure cooking saucepan in advance will be vented, there is in-mind anticipation to noise, can not alarmed again by unexpected exhaust sound.
Description
Technical field
The utility model is related to electronic control technology field, in particular to a kind of drive circuit, a kind of electromagnetic exhaust valve and
A kind of cooking apparatus.
Background technology
In the related art, for electric pressure cooking saucepan using automatic exhaust boiling technology, the core of the technology is exactly to control steam discharge to fill
The steam discharge for putting automatic batch-type allows pot is interior to produce the effect seethed with excitement, and enables more uniformly to be heated when food fully rolls in pot.
But due to being in high pressure closed state inside cooking process pressure cooker, electromagnetic exhaust valve throws open generation
Larger exhaust acoustic capacitance easily scaring arrives user.
Therefore, how to avoid unexpected violent exhaust sound from being alarmed to caused by user turns into technical problem urgently to be resolved hurrily.
Utility model content
At least one in order to solve the above-mentioned technical problem, a purpose of the present utility model is to propose a kind of driving electricity
Road.
Another purpose of the present utility model is to provide a kind of electromagnetic exhaust valve.
Another purpose of the present utility model is to propose a kind of method for exhausting.
Another purpose of the present utility model is to provide a kind of cooking apparatus.
To achieve the above object, according to the technical solution of the utility model, it is proposed that a kind of drive circuit, including：Perception
Component, the first end of perceptual component are connected to the output end of drive signal, and the second end of perceptual component is connected to load input terminal；
First electrochemical capacitor, the positive terminal of the first electrochemical capacitor are connected to the second end of perceptual component, the negative pole end of the first electrochemical capacitor
Ground connection, wherein, the dutycycle positive correlation of the load voltage and drive signal of load input terminal.
In the technical scheme, by setting perceptual component and the first electrochemical capacitor, and perceptual group in the driving circuit
The first end of part is connected to the output end of drive signal, and the second end of perceptual component is connected to load input terminal, load input terminal
Load voltage its actually first electrochemical capacitor positive terminal potential, and when charging voltage due to the first electrochemical capacitor and charging
Between positive correlation, therefore, export to the load voltage of electromagnetic exhaust valve be also with the time increase and it is elevated, and load voltage apply
Electromagnetic exhaust valve is promoted to be exhausted in electromagnetic force caused by magnet coil, load voltage and capacity are also positive correlation, that is,
Capacity gradually steps up, and efficiently avoid and suddenly user is caused to alarm with the exhaust of highest load voltage.
Wherein, a kind of the most frequently used formula of the positive terminal potential of electrochemical capacitor is as follows：
U characterizes the positive terminal potential of electrochemical capacitor, and U characterizes charging voltage value, and e characterizes the nature truth of a matter, when t characterizes charging
Between, τ characterizes the attenuation constant determined by circuit element.
Wherein, perceptual component can include one or more inductance elements, and/or other circuit elements of connecting, but feel
The equivalent output resistance of property component is presented as induction reactance characteristic, to reduce damage of the noise signal to electrochemical capacitor.
Perceptual component can be the I-shaped inductance that an inductance value is 1.3mH, and the capacitance of the first electrochemical capacitor can be set
For 100uF, charging voltage 25V.
In the above-mentioned technical solutions, it is preferable that also include：First unidirectional resistance element, the sun of the first unidirectional resistance element
Pole is grounded, and the negative pole of the first unidirectional resistance element is connected to the first end of perceptual component；First power switch, is series at the one or two
Between pole pipe and DC source, the drive end of the first power switch turns on when obtaining the first Continuity signal, and drive signal is described the
The partial pressure value of one unidirectional resistance element.
In the technical scheme, by setting drive circuit also to include the first unidirectional resistance element and the first power of series connection
Switch, its essence is when the first power switch turn on, the first power switch and the first unidirectional resistance element progress partial pressure, due to
The conducting voltage of first power switch is typically smaller than 1 volt, for example, the conducting voltage of silicon triode is 0.3 volt, germanium triode
Conducting voltage be 0.1 volt, further, since the first unidirectional resistance element is reversal connection, therefore, the first unidirectional resistance element is in
Existing high resistant, partial pressure is also much larger than conducting voltage, and therefore, drive signal is close to the voltage of DC source, namely the first electrochemical capacitor
Positive terminal potential gradually risen with the time to the voltage close to DC source, avoid suddenly with highest load voltage exhaust pair
User causes to alarm.
Wherein, the voltage range of DC source can be 0~25 volt.
In any of the above-described technical scheme, it is preferable that the first unidirectional resistance element is the first diode.
In the technical scheme, the operating current of the first diode is 1A, operating voltage 600V.
In any of the above-described technical scheme, it is preferable that when the first power switch is positive-negative-positive power tube, positive-negative-positive power tube
Emitter stage be connected to DC source, the colelctor electrode of positive-negative-positive power tube is connected to the first end of perceptual component, positive-negative-positive power tube
Drive end of the base stage as the first power switch.
It is positive-negative-positive power tube by setting the first power switch, in the base stage of positive-negative-positive power tube in the technical scheme
Reverse-biased between emitter stage and also reverse-biased between the colelctor electrode of positive-negative-positive power tube and base stage, now positive-negative-positive power tube turns on, the
One unidirectional resistance element partial pressure close to DC source voltage, and the fast response characteristic due to positive-negative-positive power tube and reversely
Recovery characteristics, the charging interval of the first electrochemical capacitor can be more accurately controlled, namely more accurately control electromagnetic exhaust valve defeated
Enter the increase rate of voltage.
In any of the above-described technical scheme, it is preferable that also include：Second electrochemical capacitor, the positive pole of the second electrochemical capacitor
End is connected to the emitter stage of positive-negative-positive power tube, the negative pole end ground connection of the second electrochemical capacitor, for filtering out the noise in DC source.
In the technical scheme, by setting the second electrochemical capacitor and being connected to DC source, DC source can be effectively reduced
In noise, improve the reliability of circuit.
For conventional capacitive, the capacity of the second electrochemical capacitor is bigger, and equivalent series inductance is bigger, and low frequency is special
Property is more preferable, can more effectively filter out low-frequency ripple.
Wherein, the capacitance of the second electrochemical capacitor can be set to 100uF, charging voltage 25V.
In any of the above-described technical scheme, it is preferable that also include：First resistor component, second resistance component and second
Power switch, it is sequentially connected in series between DC source and ground wire, the common port of first resistor component and second resistance component connects
The drive end of the first power switch is connected to, wherein, the drive end of the second power switch turns on when obtaining the second Continuity signal, and second
The load voltage of resistor assembly and second power switch is exported to first power switch as the first Continuity signal
Drive end.
In the technical scheme, by setting first resistor component, second resistance component and the second power switch of series connection,
And the load voltage of second resistance component and second power switch is exported to first work(as the first Continuity signal
The drive end of rate switch, switched the second power switch as the upper level of the first power switch in fact, namely opened with multistage
The mode of pass avoids influence of the ripple current to drive circuit, further, from improving the reliability of drive circuit.
Wherein, the equivalent resistance of first resistor component is more than more than twice of equivalent resistance of second resistance component, to protect
Demonstrate,prove the partial pressure of the partial pressure of first resistor component higher than second resistance component and the second power switch and, and then export to the second power
The drive end of switch is low level signal.
Generally, using standard lamped element as first resistor component and second resistance component, by first resistor component
Resistance is set to 10K ohms, and the resistance of second resistance component is set to 1K ohms.
In any of the above-described technical scheme, it is preferable that when the second power switch is NPN type power tube, NPN type power tube
Grounded emitter, the colelctor electrode of NPN type power tube is connected to second resistance component, described in the base stage of NPN type power tube is used as
The drive end of second power switch.
It is NPN type power tube by setting the second power switch, in the base stage of NPN type power tube in the technical scheme
The positively biased between emitter stage, and also positively biased between the colelctor electrode of NPN type power tube and base stage, now NPN type power tube conducting,
The partial pressure of NPN type power tube and second resistance component is low-voltage, and then triggers the conducting of positive-negative-positive power tube, multiple-pole switch control
In the charging interval of first electrochemical capacitor, further, improve the accuracy and reliability of drive circuit control.
In any of the above-described technical scheme, it is preferable that also include：Impulse generator, it is connected to the base of NPN type power tube
Pole, Continuity signal of the modulated pulse signal that impulse generator exports as the NPN type power tube.
, can be simply by the duty of setting high level signal by setting impulse generator in the technical scheme
Than controlling the conducting of the second power switch and the first power switch successively, namely by the dutycycle of high level signal come indirectly
The charging interval of the first electrochemical capacitor is controlled, improves the elevation process of the load voltage of electromagnetic exhaust valve, it is complicated without setting
The software control algorithm initial value and step value of load voltage (set), simplify the realization of drive circuit of the present utility model
Scheme, and reduce hardware maintenance cost.
In any of the above-described technical scheme, it is preferable that also include：First shunt capacitance, it is connected in parallel to the first electrolysis
The both ends of electric capacity, for filtering out the noise in load voltage.
In the technical scheme, by setting the first shunt capacitance to be connected in parallel to the both ends of the first electrochemical capacitor, it can improve
The ability of Ripple Noise is filtered out, optimizes the reliability of the charging process of the first electrochemical capacitor.
Wherein, the capacitance of the first shunt capacitance can be 104uF, and pressure-resistant can be 50V.
In any of the above-described technical scheme, it is preferable that also include：The first divider resistance being connected in series and the second partial pressure
Resistance, it is connected in parallel to the common port output voltage at the both ends of the first electrochemical capacitor, the first divider resistance and the second divider resistance
Sampled signal.
In the technical scheme, by setting the first divider resistance and the second divider resistance of series connection, and according to output
Voltage sampling signal monitors the load voltage of electromagnetic exhaust valve, can be used for the duty for adjusting the output signal of impulse generator
Than can be used for triggering the overvoltage protective module work inside electromagnetic exhaust valve, furthermore it is also possible to according to the load of sampling electricity
The size generation prompt message of pressure.
Wherein, the first divider resistance and the second divider resistance can be set to 10K ohms and 1K ohms.
In any of the above-described technical scheme, it is preferable that also include：Second shunt capacitance, it is connected in parallel to the second partial pressure
The both ends of resistance, for filtering out the noise in voltage sampling signal.
In the technical scheme, by setting the second shunt capacitance, it is possible to increase the reliability and standard of voltage sampling signal
True property.
Wherein, the capacitance of the second shunt capacitance can be 104uF, and pressure-resistant can be 50V.
In any of the above-described technical scheme, it is preferable that also include：Second unidirectional resistance element, it is connected to described
Between the load input terminal and ground wire of electromagnetic exhaust valve.
In the technical scheme, by setting the second unidirectional resistance element, the work of divided current is played to electromagnetic exhaust valve
With further increasing the reliability of drive circuit.
In any of the above-described technical scheme, it is preferable that the second unidirectional resistance element is the second diode, the described 2nd 2
The plus earth of pole pipe, the negative electrode of second diode are connected to the load input terminal of the electromagnetic exhaust valve.
According to the utility model second aspect, it is also proposed that a kind of electromagnetic exhaust valve, including：Magnet assembly, movably
In the exhaust passage of electromagnetic exhaust valve；Drive circuit described in any one technical scheme as described above；Magnet coil, as electricity
The load input terminal of magnetic air bleeding valve is connected to drive circuit, and magnet coil is arranged magnet assembly setting, and magnet coil obtains driving
The capacity positive correlation of the load voltage of circuit output, load voltage and exhaust passage.
In the technical scheme, magnet assembly is moved in the exhaust passage of electromagnetic exhaust valve, is passed through
Drive circuit is set to provide electromagnetic exhaust valve the load voltage to edge up, the load input terminal load of electromagnetic exhaust valve is electromagnetic wire
Circle, and magnet assembly setting is arranged, magnet coil obtains the output voltage values of drive circuit, controls moveable magnet assembly,
And the capacity positive correlation of load voltage and exhaust passage, the opening degree of electromagnetic exhaust valve is adjusted by small and big, control electromagnetism
The exhaust sound of air bleeding valve changes from weak to strong, and allowing user to predict electric pressure cooking saucepan in advance will be vented, and have in-mind anticipation to noise, no longer
It can be alarmed by unexpected exhaust sound.
Specifically, drive circuit regulation output voltage values gradually increase, and the input load of electromagnetic exhaust valve is magnet coil
Control electromagnetic assembly position is moved so that and electromagnetic exhaust valve opening degree gradually increases, now, the exhaust of electromagnetic exhaust valve
Sound also changes from weak to strong accordingly.
Wherein, solenoid valve vents principle is, the magnet coil of magnetic valve, which is powered, produces magnetic field, magnetic field have to air bleeding valve to
On active force N1, N1 size it is relevant with solenoid valves voltage swing, voltage is bigger, and its active force to air bleeding valve is bigger,
When thrust caused by the steam pressure in pressure cooker, plus the active force N1 of magnetic valve, during more than air bleeding valve gravity in itself, row
Air valve, which turns on, to be exhausted, and N1 is bigger, and the opening degree of air bleeding valve is bigger, and exhaust sound is also bigger.
According to the utility model third aspect, it is also proposed that a kind of method for exhausting, including：It is determined that initial pressure during exhaust
Value；Pressure value gear according to belonging to initial pressure value, determines load voltage corresponding to initial pressure value；Control any of the above-described
Drive circuit output loading voltage described in technical scheme.
, can by determining load voltage according to the pressure value gear belonging to initial pressure value in the technical scheme
The load voltage according to corresponding to determining the actual demand of capacity, the user of exhaust agitation suddenly is avoided as far as possible, while also to try one's best
Shorten evacuation time, to lift the usage experience of user.
Specifically, when initial pressure value is larger corresponding to capacity, directly it is exhausted with maximum load voltage, now
Capacity most conference alarms user, therefore, by drive circuit of the present utility model load voltage gradual change can be controlled to raise.
In addition, when initial pressure value is smaller corresponding to capacity, even if being directly vented with maximum load voltage, exhaust
Sound will not also alarm user, therefore, at this point it is possible to control drive circuit quickly to export maximum load voltage, when shortening exhaust
Between to reduce the stand-by period of user.
In the above-mentioned technical solutions, it is preferable that the pressure value gear according to belonging to initial pressure value, determine initial pressure value
Corresponding load voltage, is specifically included：When detecting that initial pressure value is less than preset pressure value, determine that initial pressure value belongs to
Low-grade location in pressure value gear；Under low-grade location, it is predetermined maximum voltage value to set load voltage corresponding to initial pressure value,
Wherein, evacuation time corresponding to predetermined maximum voltage value is to preset maximum evacuation time.
In the technical scheme, by under low-grade location, setting load voltage corresponding to initial pressure value as default maximum
Magnitude of voltage, it is in order to export maximum load voltage with prestissimo, the charging interval of the first electrochemical capacitor of drive circuit is maximum
Change, namely trickle charge.
In any of the above-described technical scheme, it is preferable that the pressure value gear according to belonging to initial pressure value, it is determined that initially
Load voltage corresponding to pressure value, is specifically included：When detecting that initial pressure value is more than or equal to preset pressure value, it is determined that just
The high tap position that beginning pressure value belongs in pressure value gear；Under high tap position, control initial pressure value corresponding to load voltage according to
Default volt-time curve gradually rises, to reaching predetermined maximum voltage value.
In the technical scheme, by under high tap position, controlling load voltage corresponding to initial pressure value according to default
Volt-time curve gradually rises, and to predetermined maximum voltage value is reached, can be effectively reduced agitation of the exhaust process to user,
Namely capacity is from as low as big, by controlling the charging interval of the first electrochemical capacitor, to control exhaust velocity.
In any of the above-described technical scheme, it is preferable that also include：It is bent that default volt-time curve includes first voltage
Line and second voltage curve, the duration of first voltage curve is the first gear evacuation time, and second voltage curve continues
Time is the second gear evacuation time, wherein, finish time the rising for the second gear evacuation time of the first gear evacuation time
Begin the moment, the finish time of the second gear evacuation time is the initial time for presetting maximum evacuation time.
In the technical scheme, dutycycle corresponding to first voltage curve and second voltage curve is differed, and dutycycle is got over
Greatly, effective charging interval of the first electrochemical capacitor is longer.
In any of the above-described technical scheme, it is preferable that the first gear evacuation time and/or the second gear evacuation time
Time range is 0~2 second.
In the technical scheme, by the time model for setting the first gear evacuation time and/or the second gear evacuation time
Enclose for 0~2 second, load voltage is increased to maximum load voltage in 0~4 second, avoid and directly arranged with maximum load voltage
Gas causes to alarm to user.
In any of the above-described technical scheme, it is preferable that also include：The duty of drive signal corresponding to first voltage curve
Than for 5:32.
In any of the above-described technical scheme, it is preferable that also include：The duty of drive signal corresponding to second voltage curve
Than for 10:32.
According to fourth aspect of the present utility model, it is also proposed that a kind of cooking apparatus, including：Any one technical side as described above
Drive circuit described in case；And/or any one of the as described above electromagnetic exhaust valve described in technical scheme；And/or using any of the above-described
Method for exhausting described in item technical scheme is exhausted.
By above technical scheme, by setting perceptual component and the first electrochemical capacitor, and perception in the driving circuit
The first end of component is connected to the output end of drive signal, and the second end of perceptual component is connected to load input terminal, load input
The positive terminal potential of its actually first electrochemical capacitor of the load voltage at end, and charging voltage and charging due to the first electrochemical capacitor
Time positive correlation, therefore, it is also elevated with time growth to export to the load voltage of electromagnetic exhaust valve, and load voltage is applied
Being added on electromagnetic force caused by magnet coil promotes electromagnetic exhaust valve to be exhausted, and load voltage and capacity are also positive correlation,
That is, capacity gradually steps up, and efficiently avoid and suddenly user is caused to alarm with the exhaust of highest load voltage.
Brief description of the drawings
Fig. 1 shows the schematic diagram of the drive circuit according to one embodiment of the present utility model；
Fig. 2 shows the schematic diagram of the drive circuit according to another embodiment of the present utility model；
Fig. 3 shows the schematic diagram of the drive circuit according to further embodiment of the present utility model；
Fig. 4 shows the schematic flow diagram of the method for exhausting according to one embodiment of the present utility model；
Fig. 5 shows the schematic flow diagram of the method for exhausting according to another embodiment of the present utility model；
Fig. 6 shows the schematic diagram of the volt-time curve according to one embodiment of the present utility model；
Fig. 7 shows the schematic diagram of the electromagnetic exhaust valve according to one embodiment of the present utility model.
Embodiment
In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool
The utility model is further described in detail body embodiment.It should be noted that in the case where not conflicting, this Shen
The feature in embodiment and embodiment please can be mutually combined.
Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality
It is new third party's mode described here to be different from using third party to implement, therefore, protection model of the present utility model
Enclose and do not limited by following public specific embodiment.
Fig. 1 shows the schematic diagram of the drive circuit according to one embodiment of the present utility model.
Fig. 2 shows the schematic diagram of the drive circuit according to another embodiment of the present utility model.
Fig. 3 shows the schematic diagram of the drive circuit according to further embodiment of the present utility model.
Multiple embodiments according to drive circuit of the present utility model are specifically described with reference to Fig. 1 to Fig. 3.
Embodiment 1.1：
As shown in figure 1, according to the drive circuit of one embodiment of the present utility model, including：Perceptual component L, perceptual group
Part L first end is connected to the output end of drive signal, and perceptual component L the second end is connected to load input terminal；First electrolysis
Electric capacity E1, the first electrochemical capacitor E1 positive terminal are connected to perceptual component L the second end, the first electrochemical capacitor E1 negative pole termination
Ground, wherein, the load voltage Vin and drive signal of load input terminal dutycycle positive correlation.
In the technical scheme, by setting perceptual component L and the first electrochemical capacitor E1, and perception in the driving circuit
Component L first end is connected to the output end of drive signal, and perceptual component L the second end is connected to load input terminal, and load is defeated
Enter its actually first electrochemical capacitor E1 of the load voltage Vin at end positive terminal potential, and due to the first electrochemical capacitor E1 charging
Voltage and charging interval positive correlation, therefore, it is also to increase with the time and raise to export to the load voltage Vin of electromagnetic exhaust valve
, and load voltage Vin puts on electromagnetic force caused by magnet coil and promotes electromagnetic exhaust valve to be exhausted, load voltage Vin
With capacity and positive correlation, that is, capacity gradually steps up, efficiently avoid suddenly with highest load voltage Vin
Exhaust causes to alarm to user.
Wherein, a kind of the most frequently used formula of the positive terminal potential of electrochemical capacitor is as follows：
U characterizes the positive terminal potential of electrochemical capacitor, and U characterizes charging voltage value, and e characterizes the nature truth of a matter, when t characterizes charging
Between, τ characterizes the attenuation constant determined by circuit element.
Wherein, perceptual component L can include one or more inductance elements, and/or other circuit elements of connecting, but feel
Property component L equivalent output resistance is presented as induction reactance characteristic, to reduce damage of the noise signal to electrochemical capacitor.
Perceptual component L can be the I-shaped inductance that an inductance value is 1.3mH, and the first electrochemical capacitor E1 capacitance can be with
It is set to 100uF, charging voltage 25V.
Embodiment 1.2：
As shown in Fig. 2 on the basis of embodiment 1.1, drive circuit also includes：First unidirectional resistance element, first is single
Plus earth to resistance element, the negative pole of the first unidirectional resistance element are connected to perceptual component L first end；First power is opened
T1 is closed, is series between the first diode D1 and DC source Vcc, the first power switch T1 drive end obtains the first Continuity signal
When turn on, drive signal be the described first unidirectional resistance element partial pressure value.
In the technical scheme, by setting drive circuit also to include the first unidirectional resistance element and the first power of series connection
T1 is switched, its essence is when the first power switch T1 is turned on, the first power switch T1 and the first unidirectional resistance element are divided
Pressure, because the first power switch T1 conducting voltage is typically smaller than 1 volt, for example, the conducting voltage of silicon triode is 0.3 volt
Spy, the conducting voltage of germanium triode is 0.1 volt, further, since the first unidirectional resistance element is reversal connection, therefore, first is single
High resistant is presented to resistance element, partial pressure is also much larger than conducting voltage, therefore, drive signal close to DC source Vcc voltage,
That is the positive terminal potential of the first electrochemical capacitor E1 is gradually risen to the voltage close to DC source Vcc with the time, is avoided suddenly
User is caused to alarm with highest load voltage Vin exhausts.
Wherein, DC source Vcc voltage range can be 0~25 volt.
In any of the above-described technical scheme, it is preferable that the first unidirectional resistance element is the first diode D1.
In the technical scheme, the first diode D1 operating current is 1A, operating voltage 600V.
In any of the above-described technical scheme, it is preferable that when the first power switch T1 is positive-negative-positive power tube, positive-negative-positive power
The emitter e 1 of pipe is connected to DC source Vcc, and the colelctor electrode c1 of positive-negative-positive power tube is connected to perceptual component L first end, PNP
Drive ends of the base stage b1 of type power tube as the first power switch T1.
It is positive-negative-positive power tube by setting the first power switch T1, in the base of positive-negative-positive power tube in the technical scheme
It is reverse-biased between pole b1 and emitter e 1 and also reverse-biased between the colelctor electrode c1 and base stage b1 of positive-negative-positive power tube, now positive-negative-positive work(
Rate pipe turns on, the first unidirectional resistance element partial pressure close to DC source Vcc voltage, it is and quick due to positive-negative-positive power tube
Response characteristic and reverse recovery characteristic, the first electrochemical capacitor E1 charging interval can be more accurately controlled, namely more accurately
Control the increase rate of electromagnetic exhaust valve input voltage.
In any of the above-described technical scheme, it is preferable that also include：Second electrochemical capacitor E2, the second electrochemical capacitor E2's
Positive terminal is connected to the emitter e 1 of positive-negative-positive power tube, the second electrochemical capacitor E2 negative pole end ground connection, for filtering out DC source
Noise in Vcc.
In the technical scheme, by setting the second electrochemical capacitor E2 and being connected to DC source Vcc, can effectively it reduce straight
Noise in the Vcc of stream source, improve the reliability of circuit.
For conventional capacitive, the second electrochemical capacitor E2 capacity is bigger, and equivalent series inductance is bigger, and low frequency
Characteristic is more preferable, can more effectively filter out low-frequency ripple.
Wherein, the second electrochemical capacitor E2 capacitance can be set to 100uF, charging voltage 25V.
Embodiment 1.3：
As shown in figure 3, on the basis of embodiment 1.1 and embodiment 1.2, drive circuit also includes：First resistor component
R1, second resistance component R2 and the second power switch T2, are sequentially connected in series between DC source Vcc and ground wire GND, the first electricity
Resistance component R1 and second resistance component R2 common port is connected to the first power switch T1 drive end, wherein, the second power is opened
Turned on during drive end the second Continuity signal of acquisition for closing T2, second resistance component R2 and the second power switch T2 load electricity
Pressure Vin is exported to the drive end of the first power switch T1 as the first Continuity signal.
In the technical scheme, by the first resistor component R1, second resistance component R2 and the second power that set series connection
T2 is switched, and second resistance component R2 and the second power switch T2 load voltage Vin are defeated as the first Continuity signal
Go out to the drive end of the first power switch T1, be upper one using the second power switch T2 as the first power switch T1 in fact
Level switch, namely influence of the ripple current to drive circuit is avoided in a manner of multiple-pole switch, further, improve driving electricity
The reliability on road.
Wherein, more than twice of equivalent resistance of the first resistor component R1 equivalent resistance more than second resistance component R2,
With ensure first resistor component R1 partial pressure higher than second resistance component R2 and the second power switch T2 partial pressure and, and then export
Drive end to the second power switch T2 is low level signal.
Generally, using standard lamped element as first resistor component R1 and second resistance component R2, by first resistor group
Part R1 resistance is set to 10K ohms, and second resistance component R2 resistance is set to 1K ohms.
In any of the above-described technical scheme, it is preferable that when the second power switch T2 is NPN type power tube, NPN type power
The emitter e 2 of pipe is grounded, and the colelctor electrode c2 of NPN type power tube is connected to second resistance component R2, the base stage of NPN type power tube
Drive ends of the b2 as the second power switch T2.
It is NPN type power tube by setting the second power switch T2, in the base of NPN type power tube in the technical scheme
Positively biased between pole b2 and emitter e 2, and also positively biased between the colelctor electrode c2 and base stage b2 of NPN type power tube, now NPN type work(
Rate pipe turns on, and NPN type power tube and second resistance component R2 partial pressure are low-voltage, and then triggers the conducting of positive-negative-positive power tube, more
In the first electrochemical capacitor E1 of level switch control charging interval, further, improve the accuracy of drive circuit control and reliable
Property.
In any of the above-described technical scheme, it is preferable that also include：Impulse generator, it is connected to the base of NPN type power tube
The Continuity signal of pole b2, the modulated pulse signal PWM that impulse generator exports as the NPN type power tube.
, can be simply by the duty of setting high level signal by setting impulse generator in the technical scheme
Than controlling the second power switch T2 and the first power switch T1 conducting successively, namely by the dutycycle of high level signal come
In the first electrochemical capacitor of indirect control E1 charging interval, the load voltage Vin of electromagnetic exhaust valve elevation process is improved, without
Complicated software control algorithm (initial value and step value that set load voltage Vin) is set, simplifies drive of the present utility model
The implementation of dynamic circuit, and reduce hardware maintenance cost.
In any of the above-described technical scheme, it is preferable that also include：First shunt capacitance C1, it is connected in parallel to the first electricity
Electric capacity E1 both ends are solved, for filtering out the noise in load voltage Vin.
, can by setting the first shunt capacitance C1 to be connected in parallel to the first electrochemical capacitor E1 both ends in the technical scheme
The ability for filtering out Ripple Noise is improved, optimizes the reliability of the first electrochemical capacitor E1 charging process.
Wherein, the first shunt capacitance C1 capacitance can be 104uF, and pressure-resistant can be 50V.
In any of the above-described technical scheme, it is preferable that also include：The first divider resistance r1 being connected in series and second point
Piezoresistance r2, is connected in parallel to the first electrochemical capacitor E1 both ends, and the first divider resistance r1 and the second divider resistance r2's is public
Hold output voltage sampled signal Vin_ad.
In the technical scheme, by the first divider resistance r1 and the second divider resistance r2 of setting series connection, and according to
Output voltage sampled signal Vin_ad monitors the load voltage Vin of electromagnetic exhaust valve, can be used for adjusting the defeated of impulse generator
Go out the dutycycle of signal, can be used for triggering the overvoltage protective module work inside electromagnetic exhaust valve, furthermore it is also possible to according to
Voltage sampling signal Vin_ad size generation prompt message.
Wherein, the first divider resistance r1 and the second divider resistance r2 can be set to 10K ohms and 1K ohms.
In any of the above-described technical scheme, it is preferable that also include：Second shunt capacitance C2, is connected in parallel to second point
Piezoresistance r2 both ends, for filtering out the noise in voltage sampling signal.
In the technical scheme, pass through set the second shunt capacitance C2, it is possible to increase the reliability of voltage sampling signal and
Accuracy.
Wherein, the second shunt capacitance C2 capacitance can be 104uF, and pressure-resistant can be 50V.
In any of the above-described technical scheme, it is preferable that also include：Second unidirectional resistance element, it is connected to described
Between the load input terminal and ground wire GND of electromagnetic exhaust valve.
In the technical scheme, by setting the second unidirectional resistance element, the work of divided current is played to electromagnetic exhaust valve
With further increasing the reliability of drive circuit.
In any of the above-described technical scheme, it is preferable that the second unidirectional resistance element is the second diode D2, described second
Diode D2 plus earth, the negative electrode of the second diode D2 are connected to the load input terminal of the electromagnetic exhaust valve.
Fig. 4 shows the schematic flow diagram of the method for exhausting according to one embodiment of the present utility model.
Fig. 5 shows the schematic flow diagram of the method for exhausting according to another embodiment of the present utility model.
With reference to Fig. 4 and Fig. 5 to being specifically described according to the method for exhausting of embodiment of the present utility model.
Embodiment 2.1：
As shown in figure 4, the method for exhausting according to embodiment of the present utility model：Step 402, it is determined that exhaust when initial pressure
Force value；Step 404, the pressure value gear according to belonging to initial pressure value, determines load voltage corresponding to initial pressure value；Step
406, control the drive circuit output loading voltage described in any of the above-described technical scheme.
, can by determining load voltage according to the pressure value gear belonging to initial pressure value in the technical scheme
The load voltage according to corresponding to determining the actual demand of capacity, the user of exhaust agitation suddenly is avoided as far as possible, while also to try one's best
Shorten evacuation time, to lift the usage experience of user.
Specifically, when initial pressure value is larger corresponding to capacity, directly it is exhausted with maximum load voltage, now
Capacity most conference alarms user, therefore, by drive circuit of the present utility model load voltage gradual change can be controlled to raise.
In addition, when initial pressure value is smaller corresponding to capacity, even if being directly vented with maximum load voltage, exhaust
Sound will not also alarm user, therefore, at this point it is possible to control drive circuit quickly to export maximum load voltage, when shortening exhaust
Between to reduce the stand-by period of user.
In the above-mentioned technical solutions, it is preferable that the pressure value gear according to belonging to initial pressure value, determine initial pressure value
Corresponding load voltage, is specifically included：When detecting that initial pressure value is less than preset pressure value, determine that initial pressure value belongs to
Low-grade location in pressure value gear；Under low-grade location, it is predetermined maximum voltage value to set load voltage corresponding to initial pressure value,
Wherein, evacuation time corresponding to predetermined maximum voltage value is to preset maximum evacuation time.
In the technical scheme, by under low-grade location, setting load voltage corresponding to initial pressure value as default maximum
Magnitude of voltage, it is in order to export maximum load voltage with prestissimo, the charging interval of the first electrochemical capacitor of drive circuit is maximum
Change, namely trickle charge.
In the above-mentioned technical solutions, it is preferable that the pressure value gear according to belonging to initial pressure value, determine initial pressure value
Corresponding load voltage, is specifically included：When detecting that initial pressure value is more than or equal to preset pressure value, initial pressure is determined
The high tap position that value belongs in pressure value gear；Under high tap position, load voltage corresponding to initial pressure value is controlled according to default
Volt-time curve gradually rises, to reaching predetermined maximum voltage value.
In the technical scheme, by under high tap position, controlling load voltage corresponding to initial pressure value according to default
Volt-time curve gradually rises, and to predetermined maximum voltage value is reached, can be effectively reduced agitation of the exhaust process to user,
Namely capacity is from as low as big, by controlling the charging interval of the first electrochemical capacitor, to control exhaust velocity.
Embodiment 2.2：
As shown in figure 5, on the practice processes of embodiment 2.1, the pressure value gear according to belonging to initial pressure value, it is determined that
Load voltage corresponding to initial pressure value, is specifically included：Step 502, start exhaust, can be that exhaust instruction is preengage according to user
Enter exhaust schedule into exhaust schedule, or according to instant exhaust instruction；Step 504, sound prompting, namely be vented entering
While process, user is prompted in a voice form；Step 506, with the first dutycycle D1 output loading voltages, when exhaust continues
Between Δ T1；Step 508, with the second dutycycle D2 output loading voltages, exhaust duration Δ T2, the first dutycycle D1 are less than the
Two dutycycle D2, namely the gradually increase rate of increase load voltage, to be gradually increased capacity；Step 510, with maximum voltage
Value driving electromagnetic exhaust valve continuous working period Δ T3.
In any of the above-described technical scheme, it is preferable that also include：It is bent that default volt-time curve includes first voltage
Line and second voltage curve, the duration of first voltage curve is the first gear evacuation time, and second voltage curve continues
Time is the second gear evacuation time, wherein, finish time the rising for the second gear evacuation time of the first gear evacuation time
Begin the moment, the finish time of the second gear evacuation time is the initial time for presetting maximum evacuation time.
In the technical scheme, dutycycle corresponding to first voltage curve and second voltage curve is differed, and dutycycle is got over
Greatly, effective charging interval of the first electrochemical capacitor is longer.
In any of the above-described technical scheme, it is preferable that the first gear evacuation time and/or the second gear evacuation time
Time range is 0~2 second.
In the technical scheme, by the time model for setting the first gear evacuation time and/or the second gear evacuation time
Enclose for 0~2 second, load voltage is increased to maximum load voltage in 0~4 second, avoid and directly arranged with maximum load voltage
Gas causes to alarm to user.
In any of the above-described technical scheme, it is preferable that also include：The duty of drive signal corresponding to first voltage curve
Than for 5:32.
In any of the above-described technical scheme, it is preferable that also include：The duty of drive signal corresponding to second voltage curve
Than for 10:32.
Embodiment 3
Fig. 6 shows the schematic diagram of the volt-time curve according to one embodiment of the present utility model.
Fig. 7 shows the schematic diagram of the electromagnetic exhaust valve according to one embodiment of the present utility model.
As shown in Figure 6 and Figure 7, according to the electromagnetic exhaust valve of one embodiment of the present utility model, including：Magnet assembly
(including valve body), is movably disposed in the exhaust passage of electromagnetic exhaust valve；Driving described in any one technical scheme as described above
Circuit；Magnet coil, the load input terminal as electromagnetic exhaust valve are connected to drive circuit, and magnet coil is arranged magnet assembly and set
Put, magnet coil obtains the load voltage of drive circuit output, the capacity positive correlation of load voltage and exhaust passage.
In the technical scheme, magnet assembly is moved in the exhaust passage of electromagnetic exhaust valve, is passed through
Drive circuit is set to provide electromagnetic exhaust valve the load voltage to edge up, the load input terminal load of electromagnetic exhaust valve is electromagnetic wire
Circle, and magnet assembly setting is arranged, magnet coil obtains the output voltage values of drive circuit, controls moveable magnet assembly,
And the capacity positive correlation of load voltage and exhaust passage, the opening degree of electromagnetic exhaust valve is adjusted by small and big, control electromagnetism
The exhaust sound of air bleeding valve changes from weak to strong, and allowing user to predict electric pressure cooking saucepan in advance will be vented, and have in-mind anticipation to noise, no longer
It can be alarmed by unexpected exhaust sound.
Specifically, drive circuit regulation output voltage values gradually increase, and the input load of electromagnetic exhaust valve is magnet coil
Control electromagnetic assembly position is moved so that and electromagnetic exhaust valve opening degree gradually increases, now, the exhaust of electromagnetic exhaust valve
Sound also changes from weak to strong accordingly.
Wherein, solenoid valve vents principle is, the magnet coil of magnetic valve, which is powered, produces magnetic field, magnetic field have to air bleeding valve to
On active force N1, N1 size it is relevant with solenoid valves voltage swing, voltage is bigger, and its active force to air bleeding valve is bigger,
When thrust caused by the steam pressure in pressure cooker, plus the active force N1 of magnetic valve, more than valve body gravity G when, air bleeding valve
Turn on and be exhausted, as shown in fig. 7, N1 is bigger, the speed that valve body moves up is faster, namely the steam vent of work is more,
Now, the opening degree of electromagnetic exhaust valve is bigger, and exhaust sound is also bigger, and exhaust velocity is more and more faster.
More specifically, as shown in fig. 6, being included according to the application process of the load voltage of embodiment of the present utility model：
In duration of Δ T1, load voltage is increased to V1, and now active force N1 is equal to gravity G, and prompting letter can be generated according to V1
The prompting of breath, such as auditory tone cues, flashing lamp and vibration prompt, go successively to duration of Δ T2 corresponding to the first dutycycle D1
Interior, load voltage is increased to V2, and now active force N1 is more than gravity G, and valve body is pushed upwardly to realize the gas in exhaust passage
Body is discharged in steam vent, and with entering corresponding to the second dutycycle D2 in duration of Δ T2, load voltage is increased to Vmax, this
When active force N1 reach maximum, can be exhausted that hole is most, and now deflation rate is maximum, and the duration of Δ T3 of exhaust can
Determined with according to initial pressure value, or detected and controlled according to pressure sensor, for example, detecting exhaust process in pressure sensor
Middle pressure is less than safe pressure, then terminates exhaust process.
The technical solution of the utility model is described in detail above in association with accompanying drawing, it is contemplated that technology how in correlation technique
Problem, the utility model proposes a kind of new exhaust scheme, by setting perceptual component and first to be electrolysed in the driving circuit
Electric capacity, and the first end of perceptual component is connected to the output end of drive signal, it is defeated that the second end of perceptual component is connected to load
Enter end, the positive terminal potential of its actually first electrochemical capacitor of the load voltage of load input terminal, and due to the first electrochemical capacitor
Charging voltage and charging interval positive correlation, therefore, it is also to increase with the time and raise to export to the load voltage of electromagnetic exhaust valve
, and load voltage puts on electromagnetic force caused by magnet coil and promotes electromagnetic exhaust valve to be exhausted, load voltage and exhaust
Amount and positive correlation, that is, capacity gradually steps up, it efficiently avoid and be vented suddenly with highest load voltage to user
Cause to alarm.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (15)
1. a kind of drive circuit, the output end of the drive circuit is connected to the load input terminal of electromagnetic exhaust valve, and its feature exists
In the drive circuit includes：
Perceptual component, the first end of the perceptual component are connected to the output end of drive signal, the second end of the perceptual component
It is connected to the load input terminal；
First electrochemical capacitor, the positive terminal of first electrochemical capacitor are connected to the second end of the perceptual component, and described first
The negative pole end ground connection of electrochemical capacitor,
Wherein, the dutycycle positive correlation of the load voltage of the load input terminal and the drive signal, the perceptual component
Equivalent output resistance is presented as induction reactance characteristic.
2. drive circuit according to claim 1, it is characterised in that also include：
First unidirectional resistance element, the plus earth of the first unidirectional resistance element, the first unidirectional resistance element are born
Pole is connected to the first end of the perceptual component；
First power switch, it is series between the described first unidirectional resistance element and DC source, the drive of first power switch
Moved end turns on when obtaining the first Continuity signal, and the drive signal is the partial pressure value of the described first unidirectional resistance element.
3. drive circuit according to claim 2, it is characterised in that
The first unidirectional resistance element is the first diode.
4. drive circuit according to claim 3, it is characterised in that
When first power switch is positive-negative-positive power tube, the emitter stage of the positive-negative-positive power tube is connected to the DC source,
The colelctor electrode of the positive-negative-positive power tube is connected to the first end of the perceptual component, and the base stage of the positive-negative-positive power tube is as institute
State the drive end of the first power switch.
5. drive circuit according to claim 4, it is characterised in that also include：
Second electrochemical capacitor, the positive terminal of second electrochemical capacitor are connected to the emitter stage of the positive-negative-positive power tube, and described
The negative pole end ground connection of two electrochemical capacitors, for filtering out the noise in the DC source.
6. drive circuit according to claim 2, it is characterised in that also include：
First resistor component, second resistance component and the second power switch, be sequentially connected in series in the DC source and ground wire it
Between, the common port of the first resistor component and the second resistance component is connected to the drive end of first power switch,
Wherein, turned on when the drive end of second power switch obtains the second Continuity signal, the second resistance component and institute
The load voltage for stating the second power switch is exported to the drive end of first power switch as first Continuity signal.
7. drive circuit according to claim 6, it is characterised in that
When second power switch is NPN type power tube, the grounded emitter of the NPN type power tube, the NPN type power
The colelctor electrode of pipe is connected to the second resistance component, and the base stage of the NPN type power tube is as second power switch
Drive end.
8. drive circuit according to claim 7, it is characterised in that also include：
Impulse generator, is connected to the base stage of the NPN type power tube, and the modulated pulse signal of the impulse generator output is made
For the Continuity signal of the NPN type power tube.
9. drive circuit according to any one of claim 1 to 8, it is characterised in that also include：
First shunt capacitance, the both ends of first electrochemical capacitor are connected in parallel to, for filtering out making an uproar in the load voltage
Sound.
10. drive circuit according to any one of claim 1 to 8, it is characterised in that also include：
The first divider resistance and the second divider resistance being connected in series, it is connected in parallel to the both ends of first electrochemical capacitor, institute
State the common port output voltage sampled signal of the first divider resistance and second divider resistance.
11. drive circuit according to claim 10, it is characterised in that also include：
Second shunt capacitance, the both ends of second divider resistance are connected in parallel to, for filtering out in the voltage sampling signal
Noise.
12. drive circuit according to any one of claim 1 to 8, it is characterised in that also include：
Second unidirectional resistance element, is connected between the load input terminal and ground wire of the electromagnetic exhaust valve.
13. drive circuit according to claim 12, it is characterised in that
Second unidirectional resistance element is the second diode, the plus earth of second diode, the moon of second diode
Pole is connected to the load input terminal of the electromagnetic exhaust valve.
A kind of 14. electromagnetic exhaust valve, it is characterised in that including：
Magnet assembly, it is movably disposed in the exhaust passage of the electromagnetic exhaust valve；
Drive circuit as any one of claim 1 to 13；
Magnet coil, the load input terminal as the electromagnetic exhaust valve are connected to the drive circuit, the electromagnetic wire snare
If the magnet assembly is set, the magnet coil is obtaining the load voltage of the drive circuit output, the load voltage
With the capacity positive correlation of the exhaust passage.
A kind of 15. cooking apparatus, it is characterised in that including：
Drive circuit as any one of claim 1 to 13；
Or electromagnetic exhaust valve as claimed in claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271247.6U CN207186531U (en) | 2017-03-20 | 2017-03-20 | Drive circuit, electromagnetic exhaust valve and cooking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271247.6U CN207186531U (en) | 2017-03-20 | 2017-03-20 | Drive circuit, electromagnetic exhaust valve and cooking apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN207186531U true CN207186531U (en) | 2018-04-06 |
Family
ID=61792620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720271247.6U Active CN207186531U (en) | 2017-03-20 | 2017-03-20 | Drive circuit, electromagnetic exhaust valve and cooking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207186531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123095A (en) * | 2018-10-31 | 2020-05-08 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, motor detection method, motor and household appliance |
| CN112736187A (en) * | 2020-12-30 | 2021-04-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Exhaust device and method based on self-excitation type piezoelectric element |
-
2017
- 2017-03-20 CN CN201720271247.6U patent/CN207186531U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123095A (en) * | 2018-10-31 | 2020-05-08 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, motor detection method, motor and household appliance |
| CN112736187A (en) * | 2020-12-30 | 2021-04-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Exhaust device and method based on self-excitation type piezoelectric element |
| CN112736187B (en) * | 2020-12-30 | 2024-02-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Exhaust device and method based on self-excitation type piezoelectric element |
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