CN110206719A - A kind of electromagnetism pump control system, method and household appliance - Google Patents
A kind of electromagnetism pump control system, method and household appliance Download PDFInfo
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- CN110206719A CN110206719A CN201910506606.5A CN201910506606A CN110206719A CN 110206719 A CN110206719 A CN 110206719A CN 201910506606 A CN201910506606 A CN 201910506606A CN 110206719 A CN110206719 A CN 110206719A
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- optocoupler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Abstract
The present invention relates to a kind of electromagnetism pump control system, method and household appliances, including processor and output control circuit, the processor is electrically connected with the output control circuit, the processor is used for: obtaining the zero cross signal in the AC signal of AC power source output, the zero cross signal is signal when amplitude is zero in the AC signal；Timing is carried out according to the zero cross signal, trigger signal is exported to the output control circuit according to timing result, electromagnetic pump on or off is controlled by the output control circuit；The electromagnetic pump is controlled in the output flow of corresponding period in the on-off number of different periods by changing the electromagnetic pump.Technical solution of the present invention is capable of the output flow of time-division transfer electromagnetic pump, and at low cost, small in size, structure is simple, has broad application prospects.
Description
Technical field
The present invention relates to electromagnetic pump control technology fields more particularly to a kind of electromagnetism pump control system, method and household electrical appliances to set
It is standby.
Background technique
Electromagnetic pump is to drive diaphragm to move back and forth in thorax chamber using electromagnetism push rod, causes the variation of thorax cavity pressure, into
And cause the opening and closing of imbibition valve and draining valve, the equipment for realizing sucking and the discharge of liquid.Wherein, micro electromagnetic
Pump is a kind of plunger pump of solenoid actuated, has the characteristics that small in size, compact-sized, output pressure is high and leakproofness is strong,
The good characteristic of minisize electromagnetic pump is widely used in it in small household electrical appliances such as Garment Steamer Machine.The product of the small household appliances such as Garment Steamer Machine is fixed
Position determines that electromagnetism pump control system must be at low cost, small in size, reliable and stable, while having the function of adjusting flow.
Currently, controlling the flow of electromagnetic pump frequently with following several method:
First method is to adjust the voltage of pulsafeeder by changing the silicon-controlled angle of flow, and then reach flow tune
The purpose of section.
Second method is directly to adjust voltage using pressure regulator to export to control flow.
Although above two method is able to achieve the step-less adjustment to electromagnetism pump discharge, to the control precision of flow compared with
It is low, and needed in hardware design using devices such as relays, cost and energy consumption are higher, are not suitable for the small household appliances such as Garment Steamer Machine.
The third method is controlled by adjusting the silicon-controlled turn-on time within the unit time and the ratio of deadline
The output flow of electromagnetic pump, and the zero passage obtained after being divided using zero point detection module detection alternating current via series resistance is believed
Number, although this method can reduce cost, zero point detection module will receive the influence of electric network peak pulse, exists and accidentally touches
The problem of hair, and then there is a problem of electromagnetic pump flow control exception.
Fourth method is to control electromagnetism pump output flow, zero crossing circuitry using the method for regulating cycle half-wave on-off
It is divided to obtain zero cross signal by alternating current series resistance, and is driven using based on the control method of inquiry conducting table to control electromagnetic pump
The on-off of half-wave, to realize that the multi gear position of electromagnetism pump discharge is adjusted.But the control method based on inquiry conducting table is to system
Stability and reliability requirement it is very high, due to its zero crossing circuitry obtain zero cross signal process equally will receive electric network peak arteries and veins
The influence of punching, therefore also result in out of control to the control of electromagnetism pump discharge.
In addition, above-mentioned electromagnetism pump flow control method can only be to control electromagnetic pump on-off, and electromagnetic pump is controlled with predetermined
Output flow work, further to electromagnetic pump can not be controlled.But when controlling the electromagnetic pump in small household appliances, often
Need the output flow of time-division transfer electromagnetic pump.Such as: the working principle of Garment Steamer Machine is to be delivered to water by electromagnetic pump to add
Thermal heats to generate steam water by heating device, to utilize steam to ironing clothes.Wherein, Garment Steamer Machine exists
In use process, heating device needs to preheat first, needs to turn off electromagnetic pump at this time, in case Garment Steamer Machine sprays water droplet.With when
Between passage, heating device will reach rated temperature, and can carry out ironing at this time, but the output flow of electromagnetic pump should not mistake
Greatly, in order to avoid the shortage of heat of heating device generation is water to be gasified totally.When heating device reaches rated temperature, electromagnetism at this time
Pump just with the work of rated output flow, accelerates ironing speed.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides a kind of electromagnetism pump control system, method and household appliances.
The technical scheme to solve the above technical problems is that
In a first aspect, the present invention provides a kind of electromagnetism pump control system, including output control circuit and processor, it is described
Processor is electrically connected with the output control circuit, and the processor is used for:
The zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is width in the AC signal
Signal when value is zero.
Timing is carried out according to the zero cross signal, trigger signal is exported to the output control circuit according to timing result,
Electromagnetic pump on or off is controlled by the output control circuit.
The electromagnetic pump is controlled in the output of corresponding period in the on-off number of different periods by changing the electromagnetic pump
Flow.
Second aspect, the present invention provides a kind of electromagnetism method for controlling pump, comprising:
The zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is width in the AC signal
Signal when value is zero.
Timing is carried out according to the zero cross signal, trigger signal is exported to the output control circuit according to timing result,
Electromagnetic pump on or off is controlled by the output control circuit.
The electromagnetic pump is controlled in the output of corresponding period in the on-off number of different periods by changing the electromagnetic pump
Flow.
The third aspect, the present invention provides a kind of household appliances, including electromagnetism pump control system as described above and electromagnetism
Pump, electromagnetism pump control system are electrically connected with electromagnetic pump.
The beneficial effect of electromagnetism pump control system of the invention, method and household appliance is: single-chip microcontroller can be used in processor
Obtain zero cross signal Deng, processor and carry out timing, since the time interval between two neighboring zero cross signal is fixed, can by pair
Zero cross signal, which counts, carrys out indirect timing, does not need timer, can reduce the requirements of type selecting to processor, reduce control system
Hardware cost.It can determine whether current time controls electromagnetic pump conducting according to actual needs, within any one period, pass through
Change the number of electromagnetic pump turn-on and turn-off to control electromagnetic pump in the output flow of the period.Technical solution of the present invention energy
The output flow of enough time-division transfer electromagnetic pumps, at low cost, small in size, structure is simple, has broad application prospects.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of electromagnetism pump control system of the embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of electromagnetism pump control system of the embodiment of the present invention；
Fig. 3 is a kind of control principle schematic diagram of electromagnetism pump control system of the embodiment of the present invention；
Fig. 4 is a kind of the first isolated drive circuit schematic diagram of electromagnetism pump control system of the embodiment of the present invention；
Fig. 5 is a kind of the second isolated drive circuit schematic diagram of electromagnetism pump control system of the embodiment of the present invention；
Fig. 6 is a kind of flow diagram of electromagnetism method for controlling pump of the embodiment of the present invention；
Fig. 7 is a kind of waveform diagram of the voltage signal at different periods electromagnetic pump both ends of the embodiment of the present invention.
In attached drawing, parts list represented by the reference numerals are as follows:
1, control module, 10, processor, 20, output control circuit, 30, zero cross detection circuit, 40, power circuit, 201,
Isolated drive circuit, 202, protection circuit.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1 and Figure 2, a kind of electromagnetism pump control system provided in an embodiment of the present invention, including processor 10 and output
Control circuit 20, the processor 10 are electrically connected with the output control circuit 20, and the processor 10 is used for:
The zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is width in the AC signal
Signal when value is zero.
Specifically, single-chip microcontroller can be used in processor, and singlechip cost is low, small in size.AC power source is used for as entire control
System and electromagnetic pump power supply can be used alternating current as AC power source, can correspond to output according to the selection that actually enters of electromagnetic pump
AC power source, output voltage can be 220V or 380V etc..
DC power supply is used for as the equal components power supply of processor 10, such as exports 5V direct-current working volts to processor 10,
Guarantee that processor 10 works normally.
Timing is carried out according to the zero cross signal, trigger signal is exported to output control circuit 20 according to timing result, is led to
It crosses output control circuit 20 and controls electromagnetic pump on or off.
Specifically, trigger signal includes trigger pulse, and trigger pulse, can be according to the actual situation for driving electromagnetic pump to be connected
It presets and when exports trigger pulse.Time interval between two neighboring zero cross signal is fixed, by zero cross signal meter
Number carrys out indirect timing, does not need timer, can reduce the requirements of type selecting to processor 10, reduce the hardware of control system at
This.The electromagnetic pump is controlled in the output flow of corresponding period in the on-off number of different periods by changing the electromagnetic pump.
Specifically, such as when controlling the electromagnetic pump in Garment Steamer Machine, the working time of electromagnetic pump can be divided three periods, it is preceding
15s was the first period, needed to wait heating device in Garment Steamer Machine to preheat in this period, therefore do not export trigger pulse, electromagnetic pump
It does not work.15s to 40s was the second period, and the temperature of heating device will reach rated value in this period, but not reach also specified
Value, therefore exportable a small amount of trigger pulse, control electromagnetic pump are worked with low output power, and Garment Steamer Machine is avoided to spray water droplet.40s with
It is afterwards the third period, the temperature of heating device reaches rated value, therefore exportable specified trigger pulse number, control electricity in this period
Magnetic pumping is worked with rated power, improves the output flow of electromagnetic pump.
In the present embodiment, single-chip microcontroller etc. is can be used in processor, and processor obtains zero cross signal and carries out timing, due to adjacent two
Time interval between a zero cross signal is fixed, and can not need timer by counting zero cross signal come indirect timing, can
The requirements of type selecting to processor is reduced, the hardware cost of control system is reduced.Whether can determine current time according to actual needs
Electromagnetic pump conducting is controlled, within any one period, controls electromagnetic pump by changing the number of electromagnetic pump turn-on and turn-off
In the output flow of the period.Technical solution of the present invention is capable of the output flow of time-division transfer electromagnetic pump, and cost
Low, small in size, structure is simple, has broad application prospects.
Preferably, the system also includes the zero cross detection circuit 30 being electrically connected with the processor 10, the zero passage inspections
The AC signal that slowdown monitoring circuit 30 is used to export AC power source carries out zero passage sampling, obtains the zero cross signal, and transmit
To the processor 10.
The zero cross detection circuit 30 includes rectifier diode, i.e. D1 in Fig. 2, current-limiting resistance, i.e. R1, fuse, i.e. F1,
First optocoupler, i.e. U1 and pull down resistor, i.e. R2, the first optocoupler U1 are transistor output type optocoupler, the first light including input side
The first transistor of coupling diode and outlet side, rectifier diode D1 connect with current-limiting resistance R1, the anode of rectifier diode D1
It is electrically connected with the zero curve N of alternating current, the anode electricity that the cathode of rectifier diode D1 passes through current-limiting resistance R1 and the first optocoupler diode
Connection, the cathode of the first optocoupler diode be electrically connected through fuse F1 with the firewire L of alternating current, the collector of the first transistor and
The electrical connection of VCC DC power supply, the emitter of the first transistor respectively with the MCU_IO2 pin of processor 10 and pull down resistor R2
One end electrical connection, the other end ground connection of pull down resistor R2.
Specifically, alternating current zero curve N rectified diode D1 and current-limiting resistance R1 is connected to optocoupler diode in the first optocoupler U1
Anode, optocoupler diode cathode is connected on alternating current firewire L through fuse F1, since rectifier diode D1 has one-way conduction special
Property, the first optocoupler U1 are connected in the negative half-wave of alternating current, and when positive half-wave ends.First two pins of optocoupler U1 outlet side connect respectively
MCU_IO2 pin and VCC power supply, while MCU_IO2 pin is also grounded through pull down resistor R5.When transistor is led in the first optocoupler U1
When logical, the MCU_IO2 pin of processor 10 obtains high level.When transistor cutoff in the first optocoupler U1, MCU_IO2 pin is obtained
To low level, processor 10 then captures pulse falling edge as exchange positive zero crossing.Wherein, zero crossing is AC signal amplitude
At the time of correspondence when being zero, zero cross signal is the AC signal when time being in zero crossing, the zero crossing obtained of processor 10
It is actually advanced zero crossing, the reason is as follows that:
As shown in figure 3, the one-way conduction based on optocoupler diode in the first optocoupler U1, the output letter of zero cross detection circuit 30
Negative half-wave when the overturning of number level corresponding to AC signal: 1. by low level to when high level overturning, i.e. the t1 moment in Fig. 3, right
It should be by by the end of conducting, electric main is by just to bearing, zero crossing is negative sense zero crossing at this time in optocoupler diode break-make situation；
2. overturn by high level to low level, i.e. the t2 moment in Fig. 3 is to be cut by being conducting to corresponding to optocoupler diode break-make situation
Only, for electric main by bearing just, zero crossing is positive zero crossing at this time.Only work as input side voltage due to optocoupler diode to be higher than
It can be just connected when threshold voltage, so t1, t2 moment are not real zero-crossing point.Optocoupler exports side transistor in input side voltage
Lower than directly being turned off after threshold voltage, at this time there are no real zero-crossing point is reached, so that positive zero crossing obtained is (when t2
Carve) actually it is ahead of real zero-crossing point (t3 moment).
In this preferred embodiment, it was used as using the AC signal of the advanced zero passage point moment on the negative half-wave of AC signal
Zero-signal after processor 10 gets zero cross signal, issues the list that wide pulse signal is gone in triggering output control circuit 20 immediately
Silicon-controlled to silicon-controlled or optocoupler, one-way SCR or the silicon-controlled state in back-pressure of optocoupler, are still kept off, hold at this time
Continuous output trigger signal is until when one-way SCR or the silicon-controlled end voltage-transition of optocoupler arrive positive pressure, i.e. the true zero passage of time arrival
When point, one-way SCR or the silicon-controlled just conducting of optocoupler, so that electromagnetic pump works under completely exchange positive half-wave.
Make zero cross signal relative to the AC signal using lag zero passage point moment, the scheme of the present embodiment can control list
It is connected to silicon-controlled or optocoupler is silicon-controlled at the real zero-crossing point moment, the driving half-wave signa of driving electromagnetism pump work is avoided to generate
Phase shift notch ensure that the complete of driving half-wave signa waveform, be more in line with the rated power supply mode of electromagnetic pump, and reduce
Interference in control system.
Also, the scheme of the present embodiment requires lower, existing skill to the degree of closeness of advanced zero crossing and real zero-crossing point
In order to guarantee to control precision in art, need to make advanced zero crossing as close as real zero-crossing point, which is inputted
Holding the size of current-limiting resistance R1 influences, therefore very stringent to the type selecting of current-limiting resistance R1, only needs according to reality in the present embodiment
Situation persistently exports trigger pulse enough for a long time to one-way SCR or optocoupler controlled silicon conducting, so that it may control one-way SCR
Or optocoupler is silicon-controlled is connected in real zero-crossing point, therefore, the requirement to the degree of closeness of advanced zero crossing and real zero-crossing point is very
It is low, the requirements of type selecting to component is reduced, on this basis, when selecting current-limiting resistance R1, can suitably increase current-limiting resistance
The resistance value of R1 can reduce electric current, the power consumption for reducing current-limiting resistance R1, extend the working life of component in control system.
Using the time interval between two neighboring advanced zero crossing as when base, which is power frequency period,
The namely frequency of alternating current, China's power frequency period are 20ms, can carry out timing, root indirectly by counting to zero cross signal
Working hour can be distinguished according to the quantity of zero cross signal.
Preferably, the output control circuit 20 includes isolated drive circuit 201 and protection circuit 202, the protection electricity
Road 202 includes freewheeling diode, i.e. D2 and RC peak absorbing circuit, the cathode of sustained diode 2 and the firewire of alternating current in Fig. 2
The anode of L electrical connection, sustained diode 2 is electrically connected by the isolated drive circuit 201 with the processor 10, afterflow two
The anode of pole pipe D2 is also electrically connected by the RC peak absorbing circuit with the zero curve N of alternating current, the RC peak absorbing circuit packet
Concatenated first capacitor, i.e. C1 and first resistor, i.e. R3 are included, the anode of sustained diode 2 is also electric with the cathode P- of electromagnetic pump
Connection, the cathode of sustained diode 2 are electrically connected with the positive P+ of electromagnetic pump.
Specifically, C1 and R3 are composed in series spike absorbing circuit, can enhance circuit anti-interference performance.D2 is afterflow
Diode, connects at the both ends electromagnetism pump interface P+ and P-, returns for providing afterflow in one-way SCR or the silicon-controlled shutdown of optocoupler
Road reduces impact of the inductive load to circuit of electromagnetic pump.
Preferably, the isolated drive circuit 201 includes the first isolated drive circuit and/or the second isolated drive circuit.
First isolated drive circuit includes the second optocoupler, i.e. U2 in Fig. 4, the second optocoupler U2 are that one-way SCR is defeated
Type optocoupler out, the one-way SCR output type optocoupler include the optocoupler diode of optocoupler input side and the optocoupler of optocoupler outlet side
Silicon-controlled, second resistance, i.e. R4 and the first pull-up resistor, i.e. R5, the anode of the second optocoupler diode is through the first pull-up resistor R5
It is connected to VCC DC power supply, the cathode of the second optocoupler diode is electrically connected with the MCU_IO2 pin of processor 10, the second optocoupler
The silicon-controlled anode of optocoupler is electrically connected with the cathode P- of electromagnetic pump in U2, the optocoupler of the second optocoupler U2 silicon-controlled cathode and alternating current
Zero curve N electrical connection, the silicon-controlled control electrode of the optocoupler of the second optocoupler U2 is connected to the zero curve of alternating current by second resistance R4.
Specifically, resistance R4 is connect for setting 0 ° for optocoupler thyristor operating angle with zero curve N.The I/O of processor 10
Mouth is connected to the input terminal of the second optocoupler U2 after pulling up, and removes the second optocoupler of triggering by the wide pulse signal that processor 10 issues
The optocoupler controlled silicon conducting of U2 outlet side, silicon-controlled optocoupler is one-way SCR, due to the one-way conduction of one-way SCR, the
One isolated drive circuit 201 only in exchange positive half-wave conducting, drives electromagnetism pump work.
In this preferred embodiment, optocoupler diode anode connects VCC power supply by pull-up resistor R5 in output control circuit 20,
Cathode is connected with MCU_IO3 pin.Alternating current zero curve N connects the silicon-controlled cathode of optocoupler, the silicon-controlled anode of optocoupler and electromagnetic pump P- interface
It is connected, P+ interface meets alternating current firewire L via circuit protection again, which is electromagnetic pump driving circuit.When with isolation
After output control circuit 20 receives the trigger signal of the sending of processor 10, the conducting of the second optocoupler U2 input side is now in Fig. 3
In the t2 moment, due to exchange be in negative half wave cycles, the silicon-controlled receiving back-pressure of U2 outlet side optocoupler, still in off state.
To the t3 moment, the trigger pulse of optocoupler input side still maintains low level, is directly connected after silicon-controlled receiving positive pressure.Even if later
Trigger signal disappears, but silicon-controlled still in barotropic state, also will continue to be connected, and turns off after the t4 moment bears back-pressure.
Second isolated drive circuit includes third optocoupler, i.e. U3 in Fig. 5, third optocoupler U3 are transistor output type light
Coupling, the transistor output type optocoupler include the third optocoupler diode of optocoupler input side and the second crystal of optocoupler outlet side
Pipe, further includes the second pull-up resistor, i.e. R8,3rd resistor, i.e. R9, the 4th resistance, i.e. R10 and one-way SCR D8, third light
The anode of coupling diode is connected to VCC DC power supply, the cathode and processor of third optocoupler diode through the second pull-up resistor R8
10 MCU_IO3 pin electrical connection, the collector of second transistor and VCC power electric connection, the emitter of second transistor with
3rd resistor R9 and the 4th resistance R10 are sequentially connected in series between ground, the control electrode of one-way SCR D8 is connected to 3rd resistor R9
And the 4th between resistance R10, the cathode of one-way SCR D8 is electrically connected with the zero curve N of alternating current, the anode of one-way SCR D8 with
The cathode P- of electromagnetic pump is electrically connected.
Specifically, the I/O mouth of processor 10 is connected to the input terminal of third optocoupler U3, third optocoupler U3 input after pulling up
The optocoupler diode anode of side connects VCC power supply by pull-up resistor R8, and cathode is connected with MCU_IO3 pin.Third optocoupler U3 output
The second transistor anode of side connects VCC DC power supply through pull-up resistor R8, and cathode is grounded through two divider resistances R9 and R10.It is single
To silicon-controlled D8 and electromagnetism series connection of pumps, play the role of rectification and control electromagnetic pump on-off.The control electrode of one-way SCR D8
It connects between two divider resistances R9 and R10, thus to obtain the triggering for the control one-way SCR D8 on-off that processor 10 exports
Signal.When processor 10 issues trigger pulse, the optocoupler transistor turns of third optocoupler U3, one-way SCR D8 is then in the time
It is connected immediately after reaching real zero-crossing point, electromagnetic pump obtains positive half-wave driving signal.The cathode of one-way SCR D8 connects city's electrical zero
Line N, anode are connected with electromagnetic pump P- interface, and electromagnetic pump P+ interface meets alternating current firewire L via protection circuit again, which is electricity
Magnetic pumping driving circuit.
When processor 10 issues trigger signal, the conducting of third optocoupler U3 input side, outlet side is also connected at once, unidirectional controllable
Silicon D8 obtains Continuity signal, and at the t2 moment in corresponding diagram 3, AC signal is in negative half wave cycles at this time, and one-way SCR D8 is held
By back-pressure, still in off state.When to the t3 moment, since trigger signal is still low level wide pulse signal, so that unidirectionally may be used
Control silicon D8 Continuity signal still remains, and one-way SCR D8 is directly led when AC signal is switched to positive half-wave period receiving positive pressure
It is logical.To the t4 moment, AC signal is again introduced into negative half wave cycles, and one-way SCR D8 bears back-pressure again and turns off.
In this preferred embodiment, the isolation characteristic of optocoupler is utilized in output control circuit 20, effectively prevent handling
Device pin directly controls existing false triggering problem when one-way SCR or silicon-controlled optocoupler, while it is logical that electromagnetic pump can be isolated again
Disconnected moment, alternation Unbalanced voltage mode are interfered caused by control system, increase the stability of system.
It preferably, further include substrate, the zero cross detection circuit 30, the processor 10 and the isolated drive circuit
201 are respectively provided on the substrate, and all circuits on the substrate are packaged into thick film circuit.
Specifically, each section in control system can be handled with modular form, by zero cross detection circuit 30, processing
Device 10 and driving isolation control circuit are combined into control module 1, are integrated on one piece of substrate, glass substrate and pottery can be used in substrate
Porcelain substrate etc., and by the circuit package in control module 1 at thick film circuit, thick film circuit refers on the same substrate using battle array film
Technique (silk screen process, sintering and plating etc.) makes passive network and group loads onto discrete semiconductor device, monolithic integrated optical circuit
Or micro element and the integrated circuit that constitutes.Remaining circuit is integrated on bottom plate simultaneously, control module 1 connect composition with bottom plate
Control system.
In this preferred embodiment, by the circuit package in control module 1 at thick film circuit, its water proof and dust proof can be made,
It prolongs its service life.
It preferably, further include power circuit 40 for power supply, the power circuit 40 includes the 5th resistance, i.e. in Fig. 2
R6, the 6th resistance, i.e. R7, the second capacitor, i.e. C3, third capacitor, i.e. C5, polar capacitor, i.e. C4, first diode, i.e. D3, the
Two diodes, i.e. D4, zener diode, i.e. D5 and light emitting diode, i.e. D6.
5th resistance R6 is in parallel with the second capacitor C3, and one end of the second capacitor C3 is electrically connected with the firewire L of alternating current, also passes through
Third capacitor C5 is electrically connected with the zero curve N of alternating current, the other end of the second capacitor C3 respectively with the anode of first diode D3 and the
The cathode of two diode D4 is electrically connected, and the anode of the second diode D4 is electrically connected with alternating current zero curve N, the cathode of first diode D3
It is electrically connected with the cathode of zener diode D5, the anode of zener diode D5 is electrically connected with alternating current zero curve N, and polar capacitor C4 is just
Pole is electrically connected with the cathode of zener diode D5, is used as the DC power supply, i.e. VCC power supply, and the cathode of polar capacitor C4 is grounded,
And be electrically connected with the anode of zener diode D5, the anode of polar capacitor C4 is also electrically connected with the anode of light emitting diode D6, is sent out
The cathode of optical diode D6 is electrically connected by the 6th resistance R7 with the MCU_IO1 pin of processor 10.
Specifically, it is taken first with the reduction voltage circuit that the 5th resistance R6 and the second capacitor C3 are composed in parallel from alternating current AC220V
Then electricity obtains control system needs by zener diode D5 after first diode D3 and polar capacitor C4 rectifying and wave-filtering
VCC DC power supply.Second diode D4 be freewheeling diode, in the fluctuation of load with first diode D3 and pressure stabilizing two
Pole pipe D5 constitute circuit come the extra electric current of constant-current source VCC power supply of releasing, if but the electric current is excessive, be more than zener diode D5
Maximum stable electric current, it will cause zener diode D5 permanent damages, and then lead to power circuit failure, therefore the application
In devise constant current described below compensation circuit to reduce impact of the fluctuation of load to VCC DC power supply, wherein by power supply electricity
40 output end of road, i.e., VCC power supply is connected to the MCU_IO1 pin of processor 10, structure through light emitting diode D6 and resistance R7 in figure
At constant current compensation circuit.Constant current compensation circuit on off operating mode is controlled using processor 10, make its in output control circuit 20
The working condition of the optocoupler diode of second optocoupler U2 or third optocoupler U3 input side is complementary.And it is adjusted using the 6th resistance R7
Save electric current when compensation circuit conducting, make its with when the optocoupler diode current flow of the second optocoupler U2 or third optocoupler U3 input side
Input current is in the same size, weakens influence of the fluctuation of load to VCC power supply as far as possible with this.
As shown in fig. 6, a kind of electromagnetism method for controlling pump provided in an embodiment of the present invention, comprising:
110, the zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is the AC signal
Signal when middle amplitude is zero.
120, timing is carried out according to the zero cross signal, trigger signal is exported to output control circuit according to timing result,
Electromagnetic pump on or off is controlled by the output control circuit.
130, the electromagnetic pump is controlled in the corresponding period in the on-off number of different periods by changing the electromagnetic pump
Output flow.
Preferably, the specific implementation of the zero cross signal in the AC signal for obtaining AC power source output are as follows:
The zero cross signal in the AC signal of AC power source output is obtained by zero cross detection circuit 30, it is described
Zero cross detection circuit 30 carries out zero passage sampling to the AC signal using the method for light-coupled isolation, obtains the zero cross signal.
Preferably, corresponding time point is real zero-crossing point when the amplitude of the AC signal is zero, described according to
Zero cross signal carries out timing, exports trigger signal to the output control circuit according to timing result, is controlled by the output
Circuit controling electromagnetism pump on or off specifically comprises the following steps:
The zero cross signal is counted, count results are obtained.
Using the time interval between two adjacent zero cross signals as when base, counted in conjunction with the count results
When, obtain timing result.
The Working mould corresponding with the timing result is determined in preset operating mode according to the timing result
Formula, wherein the operating mode is corresponding with the trigger signal, exports the corresponding trigger signal according to the operation mode
To the output control circuit, the trigger signal includes trigger pulse.
The trigger pulse is exported in the advanced zero crossing for being ahead of the real zero-crossing point, according to the trigger pulse control
It makes one-way SCR in the output control circuit or optocoupler is silicon-controlled is connected in the real zero-crossing point, to control electromagnetic pump
Conducting.
Specifically, at the time of advanced zero crossing is in advance with real zero-crossing point, for example, the t2 moment in Fig. 3, the different time
The trigger pulse of section processor output different number, controls electromagnetic pump with this and corresponding number is connected, to control electromagnetic pump
Output flow.
In this preferred embodiment, trigger pulse is exported in advanced zero passage point moment, one-way SCR or light can be controlled
Coupling is silicon-controlled to be connected at the real zero-crossing point moment, is avoided the driving half-wave signa of driving electromagnetism pump work from generating phase shift notch, is protected
The complete of driving half-wave signa waveform has been demonstrate,proved, has been more in line with the rated power supply mode of electromagnetic pump, and reduce in control system
Interference.
As shown in fig. 7, by taking the control method of electromagnetic pump in Garment Steamer Machine as an example, directly using count results as work in this example
The judgment basis of operation mode, program is simple, quick and convenient, and it is primary that processor 10 often detects that a positive zero crossing will enter
Whether function subprogram, into after subprogram, Counter Value CNT adds 1 first, then judge CNT less than 750 (China's power grid frequencies
Rate is 50Hz, and 15s can be counted 15 × 50 times, can set period of time according to actual needs), if so, into S00 Working mould
Formula, MCU_IO3 pin keep default output high level, do not issue trigger pulse, make electromagnetic pump after actuation before not work in 15s
Make.If CNT is not less than 750, continue judge whether CNT is more than or equal to 750 and less than 2000 (i.e. 15s to 40s after starting), if
Be then to enter S01 operating mode: MCU_IO3 pin issues 2 electromagnetic pumps of low level wide pulse signal triggering and conducting and drives half-wave
Afterwards, 4 half-waves are turned off.If judging, CNT is more than or equal to 2000 (after starting 40s), enters S02 operating mode: issuing pulse
2 half-waves are turned off after 2 electromagnetic pump driving half-waves of signal conduction.Meanwhile constant current compensation circuit is controlled using MCU_IO1 pin
On-off, when MCU_IO3 pin issues low trigger pulse every time, the output level of MCU_IO1 pin can all be got higher by low, be prolonged
When 3ms latter two pin reset simultaneously.Thereby guarantee that the optocoupler of the second optocoupler U2 or third optocoupler U3 input side in output circuit
Diode on off operating mode is complementary with constant current compensation circuit on off operating mode, so that total load current remains unchanged, reduces load current
Impact to power circuit 40.
A kind of household appliance provided in an embodiment of the present invention, including electromagnetism pump control system as described above and electromagnetic pump,
Electromagnetism pump control system is electrically connected with electromagnetic pump.The electric household appliance can be Garment Steamer Machine etc., and Garment Steamer Machine includes steam heating device, water
Case, electromagnetic pump, electromagnetism pump control system, steam jet and steam lead etc., water tank are connect by steam lead with steam jet,
Steam heating device is used to for the water in water tank being heated into high temperature, high-pressure water vapor, and steam is defeated from steam jet by steam lead
Ironing clothes out, electromagnetism pump control system are arranged for controlling electromagnetic pump, electromagnetic pump in a vapor generator, for controlling steam
The uninterrupted of steam caused by generator.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (10)
1. a kind of electromagnetism pump control system, which is characterized in that including processor and output control circuit, the processor with it is described
Output control circuit electrical connection, the processor are used for:
The zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is that amplitude is in the AC signal
Signal when zero；
Timing is carried out according to the zero cross signal, trigger signal is exported to the output control circuit according to timing result, is passed through
The output control circuit controls electromagnetic pump on or off；
The electromagnetic pump is controlled in the output flow of corresponding period in the on-off number of different periods by changing the electromagnetic pump.
2. electromagnetism pump control system according to claim 1, which is characterized in that the system also includes with the processor
The zero cross detection circuit of electrical connection, the AC signal that the zero cross detection circuit is used to export AC power source carry out zero passage
Sampling, obtains the zero cross signal, and be transmitted to the processor；
The zero cross detection circuit includes rectifier diode, current-limiting resistance, fuse, the first optocoupler and pull down resistor, and described
One optocoupler is transistor output type optocoupler, and the first transistor of the first optocoupler diode and outlet side including input side is described
The anode of rectifier diode be electrically connected with the zero curve of AC power source, the cathode of the rectifier diode pass through the current-limiting resistance and
The anode electrical connection of the first optocoupler diode, the cathode of the first optocoupler diode is through the fuse and AC power source
Firewire electrical connection, the collector of the first transistor is electrically connected with DC power supply, and the emitter of the first transistor divides
It is not electrically connected with one end of the processor and the pull down resistor, the other end ground connection of the pull down resistor.
3. electromagnetism pump control system according to claim 2, which is characterized in that the output control circuit includes that isolation is driven
Dynamic circuit and protection circuit, the protection circuit include freewheeling diode and RC peak absorbing circuit, the freewheeling diode
Cathode is electrically connected with the firewire of AC power source, and the anode of the freewheeling diode passes through the isolated drive circuit and the processing
The anode of device electrical connection, the freewheeling diode is also electrically connected by the RC peak absorbing circuit with the zero curve of AC power source,
The RC peak absorbing circuit includes concatenated first capacitor and first resistor, and the anode of the freewheeling diode is also and electromagnetic pump
Cathode electrical connection, the cathode of the freewheeling diode is electrically connected with the anode of electromagnetic pump.
4. electromagnetism pump control system according to claim 3, which is characterized in that the isolated drive circuit include first every
From driving circuit and/or the second isolated drive circuit；
First isolated drive circuit includes the second optocoupler, the first pull-up resistor and second resistance, wherein second optocoupler
Optocoupler for one-way SCR output type optocoupler, the second optocoupler diode and outlet side including input side is silicon-controlled, and described
The anode of two optocoupler diodes is connected to DC power supply through first pull-up resistor, the cathode of the second optocoupler diode with
The processor electrical connection, the silicon-controlled anode of the optocoupler are electrically connected with the cathode of electromagnetic pump, the silicon-controlled yin of the optocoupler
Pole is electrically connected with the zero curve of AC power source, and the silicon-controlled control electrode of the optocoupler is connected to AC power source by the second resistance
Zero curve；
Second isolated drive circuit includes third optocoupler, the second pull-up resistor, 3rd resistor, the 4th resistance and unidirectional controllable
Silicon, wherein the third optocoupler is transistor output type optocoupler, the of third optocoupler diode and outlet side including input side
The anode of two-transistor, the third optocoupler diode is connected to DC power supply, the third light through second pull-up resistor
The cathode of coupling diode is electrically connected with the processor, and the anode of the second transistor is electrically connected with DC power supply, and described the
The 3rd resistor and the 4th resistance, the control of the one-way SCR have been sequentially connected in series between the cathode and ground of two-transistor
Pole processed is connected between the 3rd resistor and the 4th resistance, the cathode of the one-way SCR and the zero curve of AC power source
Electrical connection, the anode of the one-way SCR are electrically connected with the cathode of electromagnetic pump.
5. electromagnetism pump control system according to claim 4, which is characterized in that it further include substrate, the zero passage detection electricity
Road, the processor and the isolated drive circuit are respectively provided on the substrate.
6. electromagnetism pump control system according to claim 1, which is characterized in that the system also includes the electricity for power supply
Source circuit, the power circuit include the 5th resistance, the 6th resistance, the second capacitor, third capacitor, polar capacitor, the one or two pole
Pipe, the second diode, zener diode and light emitting diode；
5th resistance is in parallel with second capacitor, and one end of second capacitor is electrically connected with the firewire of AC power source,
And be electrically connected by the third capacitor with the zero curve of AC power source, the other end of second capacitor is respectively with the described 1st
The anode of pole pipe and the cathode of second diode are electrically connected, the anode and the zero curve electricity of AC power source of second diode
Connection, the cathode of the first diode be electrically connected with the cathode of the zener diode, the zener diode positive and
The zero curve of AC power source is electrically connected, and the anode of the polar capacitor is electrically connected with the cathode of the zener diode, is used as described
DC power supply, the cathode ground connection of the polar capacitor, and be electrically connected with the anode of the zener diode, the polar capacitor
Anode is also electrically connected with the anode of the light emitting diode, and the cathode of the light emitting diode passes through the 6th resistance and the processing
Device electrical connection.
7. a kind of electromagnetism method for controlling pump characterized by comprising
The zero cross signal in the AC signal of AC power source output is obtained, the zero cross signal is that amplitude is in the AC signal
Signal when zero；
Timing is carried out according to the zero cross signal, trigger signal is exported to output control circuit, by described according to timing result
Output control circuit controls electromagnetic pump on or off；
The electromagnetic pump is controlled in the output flow of corresponding period in the on-off number of different periods by changing the electromagnetic pump.
8. electromagnetism method for controlling pump according to claim 7, which is characterized in that the exchange for obtaining AC power source output
The specific implementation of zero cross signal in signal are as follows:
The zero cross signal in the AC signal of AC power source output is obtained by zero cross detection circuit, wherein described
Zero cross detection circuit carries out zero passage sampling to the AC signal using the method for light-coupled isolation, obtains the zero cross signal.
9. electromagnetism method for controlling pump according to claim 8, which is characterized in that when the amplitude of the AC signal is zero pair
The time point answered is real zero-crossing point, described to carry out timing according to the zero cross signal, exports trigger signal according to timing result
To the output control circuit, electromagnetic pump on or off is controlled by the output control circuit and is specifically comprised the following steps:
The zero cross signal is counted, count results are obtained；
Using the time interval between two adjacent zero cross signals as when base, in conjunction with the count results carry out timing,
Obtain timing result；
The operating mode corresponding with the timing result is determined in preset operating mode according to the timing result,
In, the operating mode is corresponding with the trigger signal, exports the corresponding trigger signal according to the operation mode to institute
Output control circuit is stated, the trigger signal includes trigger pulse；
The trigger pulse is exported in the advanced zero crossing for being ahead of the real zero-crossing point, institute is controlled according to the trigger pulse
It states one-way SCR in output control circuit or optocoupler is silicon-controlled is connected in the real zero-crossing point, led with controlling electromagnetic pump
It is logical.
10. a kind of household appliance, which is characterized in that including electromagnetism pump control system such as claimed in any one of claims 1 to 6 and
Electromagnetic pump, electromagnetism pump control system are electrically connected with electromagnetic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910506606.5A CN110206719A (en) | 2019-06-12 | 2019-06-12 | A kind of electromagnetism pump control system, method and household appliance |
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|---|---|---|---|
| CN201910506606.5A CN110206719A (en) | 2019-06-12 | 2019-06-12 | A kind of electromagnetism pump control system, method and household appliance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112075835A (en) * | 2020-04-10 | 2020-12-15 | 杭州九阳小家电有限公司 | Water pumping control method of food processor |
| US12034439B2 (en) * | 2020-08-28 | 2024-07-09 | Festo Se & Co. Kg | Safety device, valve arrangement and method |
-
2019
- 2019-06-12 CN CN201910506606.5A patent/CN110206719A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112075835A (en) * | 2020-04-10 | 2020-12-15 | 杭州九阳小家电有限公司 | Water pumping control method of food processor |
| US12034439B2 (en) * | 2020-08-28 | 2024-07-09 | Festo Se & Co. Kg | Safety device, valve arrangement and method |
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