CN208292715U - One kind falling pole control circuit and water purifier - Google Patents
One kind falling pole control circuit and water purifier Download PDFInfo
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- CN208292715U CN208292715U CN201820134820.3U CN201820134820U CN208292715U CN 208292715 U CN208292715 U CN 208292715U CN 201820134820 U CN201820134820 U CN 201820134820U CN 208292715 U CN208292715 U CN 208292715U
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Abstract
The utility model discloses a kind of control circuit of falling pole and water purifiers, comprising: control module outputs control signals to electrode drive module；Isolated buck module accesses the first direct current, carries out signal isolation and decompression to the first direct current and handles to obtain the second direct current, and by the second direct current electricity output to electrode drive module；Constant current source module accesses the first direct current and obtains constant current signal, and constant current signal is exported to the constant current signal for making the output of electrode drive module for pole to electrode drive module；Electrode drive module controls its first input end and the conducting of the first output end, the second input terminal and second output terminal disconnection or first input end according to control signal and the first output end disconnects, the second input terminal and second output terminal are connected.The utility model can be realized constant current electrode inversing function, and circuit structure is simple, it is ensured that electrode has the working life and good working order of long period.
Description
Technical field
The utility model relates to the technical fields of falling pole, more particularly to a kind of control circuit of falling pole and water purifier.
Background technique
Pole is exactly the polarity for changing electrode.In some electrolytic processes, prolonged use can be formed in electrode surface
Pollutant influences electrolytic efficiency, reduces electrode life.It can effectively prevent electricity if the polarity of frequent two electrode of exchange
The formation of pole surface pollutant is conducive to the electrolytic efficiency and the service life that keep electrode.The general relay for using double-pole double throw at present
Device realizes electrode inversing function, but very fast degree is influenced by mechanical response rate and relay switch number, cannot reach production
The normal service life of product.
So existing in the prior art is influenced due to falling very fast degree by mechanical response rate and relay switch number,
The problem of shortening the service life of product.
Utility model content
The utility model embodiment provides one kind control circuit of falling pole and water purifier, it is intended to which solution exists in the prior art
Influenced due to falling very fast degree by mechanical response rate and relay switch number, shorten asking for the service life of product
Topic.
The first aspect of the utility model embodiment provides a kind of control circuit of falling pole, including control module, isolation drop
Die block, constant current source module and electrode drive module.
The control terminal of the output end receiving electrode drive module of control module, the output end receiving electrode driving of isolated buck module
The driving end of module, the output end of constant current source module connect altogether with the first input end of electrode drive module and the second input terminal, electricity
First output end of pole drive module and the first pole of load electrode connect, the second output terminal and load electricity of electrode drive module
Second pole of pole connects.
Control module outputs control signals to electrode drive module.
Isolated buck module accesses the first direct current, carries out signal isolation to the first direct current and decompression handles to obtain second
Direct current, and by the second direct current electricity output to electrode drive module.
Constant current source module accesses the first direct current and obtains constant current signal, and constant current signal is exported to electrode drive module,
Make electrode drive module output constant current signal.
Electrode drive module according to control signal control its first input end and the first output end conducting, the second input terminal and
Second output terminal disconnection or first input end and the first output end disconnect, the second input terminal and second output terminal are connected.
In one embodiment, electrode drive module includes first switch switch unit and second switch switch unit.
The first control terminal and the second control terminal of first switch switch unit are respectively the first control of electrode drive module
End and the second control terminal.The first control terminal and the second control terminal of second switch switch unit are respectively the of electrode drive module
Three control terminals and the 4th control terminal.
First driving end of first switch switch unit and the first driving end of second switch switch unit connect to form electricity altogether
First driving end of pole drive module, the second driving end of first switch switch unit and the second of second switch switch unit drive
Moved end connects the second driving end to form electrode drive module altogether.
The current input terminal of first switch switch unit is the first input end of electrode drive module, and first switch switching is single
The current output terminal of member is the first output end of electrode drive module.
The current input terminal of second switch switch unit is the second input terminal of electrode drive module, and second switch switching is single
The current output terminal of member is the second output terminal of electrode drive module.
In one embodiment, first switch switch unit includes first switch subelement, second switch subelement, third
Switch subelement and the 4th switch subelement.
The controlled end of first switch subelement is the first control terminal of first switch switch unit, first switch subelement
First termination third switch subelement controlled end, third switch subelement power end, first driving end, second driving end and
The power end of current input terminal and first switch switch unit, the first driving end, the second driving end and current input terminal one are a pair of
It answers, the first end and controlled end that third switchs the first output end of subelement and second output terminal switchs subelement with the 4th respectively
It connects one to one, the controlled end of second switch subelement is the second control terminal of first switch switch unit, second switch
The first end of unit and the second end of the 4th switch subelement connect the current output terminal to form first switch switch unit altogether.
In one embodiment, second switch switch unit includes the 5th switch subelement, the 6th switch subelement, the 7th
Switch subelement and the 8th switch subelement.
The controlled end of 5th switch subelement is the first control terminal of second switch switch unit, the 5th switch subelement
First termination the 7th switch subelement controlled end, the 7th switch subelement power end, first driving end, second driving end and
The power end of current input terminal and second switch switch unit, the first driving end, the second driving end and current input terminal one are a pair of
It answers, the first end and controlled end that the first output end and second output terminal of the 7th switch subelement switch subelement with the 8th respectively
It connects one to one, the controlled end of the 6th switch subelement is the second control terminal of second switch switch unit, the 6th switch
The first end of unit and the second end of the 8th switch subelement connect the current output terminal to form second switch switch unit altogether.
In one embodiment, isolated buck module includes isolated power supply unit.
The power end of isolated power supply unit, positive output end and negative sense the output end power supply with isolated buck module respectively
End, the first output end and second output terminal correspond.
Second direct current includes forward signal and negative-going signal.
Isolated power supply unit accesses the first direct current and exports forward signal respectively after signal isolation and decompression processing
And negative-going signal.
In one embodiment, constant current source module include input filter unit, constant current driving unit, switch control unit and
Constant current output unit.
The input terminal of input filter unit is the input terminal of constant current source module, and the first output termination of input filter unit is opened
The first end of control unit is closed, the second output terminal of input filter unit connects the power end of constant current driving unit, and constant current driving is single
The controlled end of the output driving termination switch control unit of member, the first current sampling port and switch control list of constant current driving unit
The second end of member and the input terminal of constant current output unit connect altogether, and the second current sampling port and ground terminal of constant current driving unit connect altogether
Yu Di, the output end of constant current output unit are the output end of constant current source module.
In one embodiment, the control circuit of falling pole further includes the power module for exporting the first direct current.
In one embodiment, the control circuit of falling pole further includes voltage transformation module.Voltage transformation module respectively with electrode
Drive module is connected with control module.
Voltage transformation module exports power supply signal respectively to electrode drive module and control module.
In one embodiment, the control circuit of falling pole further includes the master switch module connecting with control module, master switch mould
Block output switching signal is to control module.
The first aspect of the utility model embodiment provides a kind of water purifier, including load electrode and and load electrode
The control circuit of falling pole as described above of connection.
Existing beneficial effect is the utility model embodiment compared with prior art: being driven by control module coordination electrode
Dynamic model block is switched on or off state, is driven by isolated buck module to electrode drive module, passes through constant-current source mould
Block makes electrode drive module output constant current signal.It can be realized constant current electrode inversing function, circuit structure is simple, it is ensured that electrode has longer
The working life and good working order of time.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the modular structure schematic diagram for the control circuit of falling pole that one embodiment of the utility model provides；
The electrical block diagram of electrode drive module in Fig. 1 that Fig. 2 provides for one embodiment of the utility model；
The electrical block diagram of voltage reduction module is isolated in Fig. 1 that Fig. 3 provides for one embodiment of the utility model；
The electrical block diagram of constant current source module in Fig. 1 that Fig. 4 provides for one embodiment of the utility model.
Specific embodiment
In order to make those skilled in the art more fully understand this programme, below in conjunction with attached in this programme embodiment
Figure, is explicitly described the technical solution in this programme embodiment, it is clear that described embodiment is this programme a part
Embodiment, instead of all the embodiments.Based on the embodiment in this programme, those of ordinary skill in the art are not being made
The range of this programme protection all should belong in every other embodiment obtained under the premise of creative work.
The specification and claims of this programme and term " includes " and other any deformations in above-mentioned attached drawing are
Refer to " including but not limited to ", it is intended that cover and non-exclusive include.In addition, term " first " and " second " etc. are for distinguishing
Different objects, not for description particular order.
The realization of the utility model is described in detail below in conjunction with specific attached drawing:
Fig. 1 shows the structure of one kind control circuit of falling pole provided by an embodiment of the present invention, for the ease of saying
It is bright, part relevant to the utility model embodiment is illustrated only, details are as follows:
As shown in Figure 1, one kind control circuit of falling pole provided by the utility model embodiment, including control module 100, every
From voltage reduction module 200, constant current source module 300 and electrode drive module 400.
The control terminal of the output end receiving electrode drive module 400 of control module 100, the output end of isolated buck module 200
The driving end of receiving electrode drive module 400, the output end of constant current source module 300 and the first input end of electrode drive module 400
It is connect altogether with the second input terminal, the first output end of electrode drive module 400 is connect with the first pole A of load electrode 500, and electrode drives
The second output terminal of dynamic model block 400 is connect with the second pole B of load electrode 500.
Control module 100 outputs control signals to electrode drive module 400.
Isolated buck module 200 accesses the first direct current VCC, carries out at signal isolation and decompression to the first direct current VCC
Reason obtains the second direct current, and by the second direct current electricity output to electrode drive module 400, drives to electrode drive module 400
It is dynamic.
Constant current source module 300 accesses the first direct current VCC and obtains constant current signal Ic, and constant current signal Ic is exported to electrode
Drive module 400 makes 400 output constant current signal Ic of electrode drive module.
Electrode drive module 400 controls its first input end and the conducting of the first output end, the second input according to control signal
End and second output terminal disconnection or first input end and the first output end disconnect, the second input terminal and second output terminal are connected.
In the present embodiment, electrode drive module 400 switches in two kinds of working conditions according to control signal.Electrode drive
The working condition of module 400 includes:
The first working condition, the first input end of electrode drive module 400 and the first output end are connected and second is defeated
Enter end and second output terminal disconnects.
Second of working condition, the first input end of electrode drive module 400 and the first output end disconnect and second is defeated
Enter end and second output terminal conducting.
In the present embodiment, the first input end of electrode drive module 400 and the second input terminal are respectively connected to constant current signal
Ic。
In the first working condition, the first input end of electrode drive module 400 and the first output end conducting and second
When input terminal and second output terminal disconnect, the first output end output constant current signal Ic of electrode drive module 400 makes constant current signal
Ic is flowed into from the first pole of load electrode 500 and is flowed out from the second pole.
In second of working condition, the first input end of electrode drive module 400 and the first output end disconnection and second
When input terminal and second output terminal are connected, the second output terminal output constant current signal Ic of electrode drive module 400 makes constant current signal
Ic is flowed into from the second pole of load electrode 500 and is flowed out from the first pole.
In a particular application, the voltage of the first direct current VCC is 24V, and the voltage of the second direct current is 5V.
In the present embodiment, control signal changes according to predeterminated frequency, makes the outbound course of constant current signal Ic also according to default
Frequency alternately changes.
The utility model embodiment can be realized constant current electrode inversing function, and circuit structure is simple, it is ensured that electrode has the long period
Working life and good working order.
Fig. 2 shows the modular structure of electrode drive module 400 provided by an embodiment of the present invention, for the ease of
Illustrate, illustrate only part relevant to the utility model embodiment, details are as follows:
As shown in Fig. 2, the electrode drive module 400 in Fig. 1 is opened including first in one embodiment of the utility model
Close switch unit 410 and second switch switch unit 420.
The first control terminal and the second control terminal of first switch switch unit 410 are respectively the of electrode drive module 400
One control terminal and the second control terminal.The first control terminal and the second control terminal of second switch switch unit 420 are respectively that electrode drives
The third control terminal and the 4th control terminal of dynamic model block 400.
First driving end of first switch switch unit 410 and the first driving end of second switch switch unit 420 connect altogether
The first driving end of electrode drive module 400 is formed, the second driving end of first switch switch unit 410 and second switch switch
Second driving end of unit 420 connects the second driving end to form electrode drive module 400 altogether.
The current input terminal of first switch switch unit 410 is the first input end of electrode drive module, and first switch is cut
The current output terminal for changing unit 410 is the first output end of electrode drive module.
The current input terminal of second switch switch unit 420 is the second input terminal of electrode drive module, and second switch is cut
The current output terminal for changing unit 420 is the second output terminal of electrode drive module.
In one embodiment, the power end of first switch switch unit 410 accesses power supply signal+5V, and second switch is cut
The power end for changing unit 410 also accesses power supply signal+5V.
In the present embodiment, the control signal that control module 100 exports includes first control signal A1, second control signal
A2, the third control of control signal B1 and the 4th signal B2.
The first control terminal and the second control terminal of first switch switch unit 410 are respectively connected to first control signal A1 and
Two control signal A2.
The first control terminal and the second control terminal of second switch switch unit 420 are respectively connected to third control signal B1 and the
Four control signal B2.
In the present embodiment, the second direct current that isolated buck module 200 exports includes forward signal VO+ and negative-going signal
VO-。
First driving end of electrode drive module 400 and the second driving end are respectively connected to forward signal VO+ and negative-going signal
VO-。
That is, the first driving end of first switch switch unit 410 and the second driving end are respectively connected to forward signal VO+ and bear
To signal VO-, for being driven to first switch switch unit 410.
First driving end of second switch switch unit 420 and the second driving end are respectively connected to forward signal VO+ and negative sense
Signal VO-, for being driven to second switch switch unit 410.
In the present embodiment, the constant current signal Ic that constant current source module 300 exports.The electric current of first switch switch unit 410
The current input terminal of input terminal and second switch switch unit 420 accesses constant current signal Ic.
The working principle of the utility model embodiment are as follows:
First switch switch unit 410 is according to first control signal A1 and second control signal A2 on state and disconnection
Switch between state.The on state of first switch switch unit 410 be first switch switch unit 410 current input terminal and
Current output terminal conducting, the off-state of first switch switch unit 410 are the current input terminal of first switch switch unit 410
It is disconnected with current output terminal.Specifically, first switch switch unit 410 is according to first control signal A1 and second control signal A2
Level height switch between on state and off-state.In on state, first opens first switch switch unit 410
Close the first pole A of 410 output constant current signal Ic of switch unit to load electrode 500.
Second switch switch unit 420 controls the control of signal B1 and the 4th signal B2 on state and disconnection according to third
Switch between state.The on state of second switch switch unit 420 be second switch switch unit 420 current input terminal and
Current output terminal conducting, the off-state of second switch switch unit 420 are the current input terminal of second switch switch unit 420
It is disconnected with current output terminal.Specifically, second switch switch unit 420 controls the control of signal B1 and the 4th signal B2 according to third
Level height switch between on state and off-state.In on state, second opens second switch switch unit 420
Close the second pole B of 420 output constant current signal Ic of switch unit to load electrode 500.
Optionally, first switch switch unit 410 and second switch switch unit 420 are not simultaneously on state.
As shown in Fig. 2, first switch switch unit 410 includes first switch in one embodiment of the utility model
Subelement 411, second switch subelement 412, third switch subelement 413 and the 4th switch subelement 414.
The controlled end of first switch subelement 411 is the first control terminal of first switch switch unit 410, first switch
The controlled end of first termination third switch subelement 413 of unit 411, third switch the power end of subelement 413, the first driving
The power end of end, the second driving end and current input terminal and first switch switch unit 410, the first driving end, the second driving end
It is corresponded with current input terminal, third switchs the first output end of subelement 413 and second output terminal is switched with the 4th respectively
The first end and controlled end of subelement 414 connect one to one, and the controlled end of second switch subelement 412 is first switch switching
Second control terminal of unit 410, the first end of second switch subelement 412 and the second end of the 4th switch subelement 414 connect altogether
Form the current output terminal of first switch switch unit 410.
In the utility model embodiment, the controlled end access first control signal A1 of first switch subelement 411, and according to
First control signal A1 control its first end and be turned on or off.The second control of controlled end access of second switch subelement 412
Signal A2 processed, and according to second control signal A2 control its first end and be turned on or off.The electricity of third switch subelement 413
Source accesses power supply signal+5V, and the first driving is terminated into forward signal VO+, and the second driving is terminated into negative-going signal VO-, electric current
Input terminal accesses constant current signal Ic.
When the first end of first switch subelement 411 and ground conducting, the first end and ground of second switch subelement 412 are broken
It opens, third switchs the first end and second end conducting of the 4th switch subelement 414 of the control of subelement 413, and constant current signal Ic is from the
The current input terminal of three switch subelements 413 enters, from the second end output of the 4th switch subelement 414.Hereby, it is achieved that first
The current output terminal output constant current signal Ic of switch switching unit 410.
When the first end of first switch subelement 411 and ground disconnect when, the first end of second switch subelement 412 and lead
Logical, the first end and second end that third switchs the 4th switch subelement 414 of the control of subelement 413 disconnects, to make first switch
The current output terminal of switch unit 410 is grounded.
Fig. 2 shows the particular circuit configurations of first switch switch unit 410 provided by an embodiment of the present invention,
Details are as follows:
In one embodiment, first switch subelement 411 includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6
With first switch tube Q1.
The first end of 6th resistance R6 is the controlled end of first switch subelement 411, the second end of the 6th resistance R6 and the
The first end of five resistance R5 and the grid of first switch tube Q1 connect altogether, the second end of the 5th resistance R5 and the source of first switch tube Q1
It is extremely connected to ground altogether, the first end of the 4th resistance R4 is the first end of first switch subelement 411, the second termination of the 4th resistance R4
The drain electrode of first switch tube Q1.
In a particular application, first switch tube Q1 is NMOS tube.
In one embodiment, second switch subelement 412 includes the 7th resistance R7, the 8th resistance R8 and second switch
Q2。
The first end of 8th resistance R8 is the controlled end of second switch subelement 412, the second end of the 8th resistance R8 and the
The first end of seven resistance R7 and the grid of second switch Q2 connect altogether, the second end of the 7th resistance R7 and the source of second switch Q2
It is extremely connected to ground altogether, the drain electrode of second switch Q2 is the first end of second switch subelement 412.
In a particular application, second switch Q2 is NMOS tube.
In one embodiment, third switch subelement 413 include first resistor R1, second resistance R2,3rd resistor R3,
First diode D1, the first optocoupler U1 and third switching tube Q3.
The first end of first resistor R1 and the first end of second resistance R2 connect the electric current to form third switch subelement 413 altogether
Input terminal and the first output end, the second end of first resistor R1 are the first driving end that third switchs subelement 413, the first optocoupler
The positive input of U1 is the power end that third switchs subelement 413, and the negative input of the first optocoupler U1 is third switch
The controlled end of unit 413, the second end of second resistance R2, the positive output end of the first optocoupler U1, third switching tube Q3 current collection
The cathode of pole and first diode D1 connect the second output terminal to form third switch subelement 413, the negative sense of the first optocoupler U1 altogether
Output end connects altogether with the base stage of third switching tube Q3 and the first end of 3rd resistor R3, the emitter and third of third switching tube Q3
The second end of resistance R3 and the anode of first diode D1 connect the second driving end to form third switch subelement 413 altogether.
In a particular application, third switching tube Q3 is switching transistor.
In one embodiment, the 4th switch subelement 414 includes the 4th switching tube Q4.The source electrode of 4th switching tube Q4,
First end, controlled end and the second end of grid and drain electrode respectively with the 4th switch subelement 414 correspond.
In a particular application, the 4th switching tube Q4 is PMOS tube.
The working principle of the utility model embodiment are as follows: when first control signal A1 is high level, second control signal
A2 is low level, and first switch tube Q1 is connected, second switch Q2 cut-off, the first optocoupler U1 work, third switching tube Q3 conducting,
The 4th switching tube Q4 is connected, at this time the current output terminal output constant current signal Ic of first switch switch unit 410.When the first control
When signal A1 processed is low level, second control signal A2 is high level, and first switch tube Q1 ends, second switch Q2 conducting,
First optocoupler U1 do not work, third switching tube Q3 cut-off, the 4th switching tube Q4 cut-off, at this time first switch switch unit 410
Current output terminal ground connection.
As shown in Fig. 2, second switch switch unit 420 includes the 5th switch in one embodiment of the utility model
Subelement the 421, the 6th switchs subelement the 422, the 7th and switchs subelement 423 and the 8th switch subelement 424.
The controlled end of 5th switch subelement 421 is the first control terminal of second switch switch unit 420, the 5th switch
The controlled end of the 7th switch subelement 423 of the first termination of unit 421, the power end of the 7th switch subelement 423, the first driving
The power end of end, the second driving end and current input terminal and second switch switch unit 420, the first driving end, the second driving end
It is corresponded with current input terminal, the first output end and second output terminal of the 7th switch subelement 423 are switched with the 8th respectively
The first end and controlled end of subelement 424 connect one to one, and the controlled end of the 6th switch subelement 422 is second switch switching
Second control terminal of unit 420, the first end of the 6th switch subelement 422 and the second end of the 8th switch subelement 424 connect altogether
Form the current output terminal of second switch switch unit 420.
In the utility model embodiment, the controlled end access third control signal B1 of the 5th switch subelement 421, and according to
Third control signal B1 control its first end and be turned on or off.The 4th control of controlled end access of 6th switch subelement 422
Signal B2 processed, and according to the 4th control signal B2 control its first end and be turned on or off.The electricity of 7th switch subelement 423
Source accesses power supply signal+5V, and the first driving is terminated into forward signal VO+, and the second driving is terminated into negative-going signal VO-, electric current
Input terminal accesses constant current signal Ic.
When the first end of the 5th switch subelement 421 and ground conducting, the first end and ground of the 6th switch subelement 422 are broken
It opens, the first end and second end conducting of the 8th switch subelement 424 of the 7th switch subelement 423 control, constant current signal Ic is from the
The current input terminal of seven switch subelements 423 enters, from the second end output of the 8th switch subelement 424.Hereby, it is achieved that second
The current output terminal output constant current signal Ic of switch switching unit 420.
When the 5th switch subelement 421 first end and ground disconnect when, the 6th switch subelement 422 first end and lead
Logical, the first end and second end of the 8th switch subelement 424 of the 7th switch subelement 423 control disconnects, to make second switch
The current output terminal of switch unit 420 is grounded.
Fig. 2 shows the particular circuit configurations of second switch switch unit 420 provided by an embodiment of the present invention,
Details are as follows:
In one embodiment, the 5th switch subelement 421 includes the 14th resistance R14, the 15th resistance R15, the tenth
Six resistance R16 and the 5th switching tube Q5.
The controlled end that the first end of 16th resistance R16 switchs subelement 421 for the 5th, the second of the 16th resistance R16
End connects altogether with the first end of the 15th resistance R15 and the grid of the 5th switching tube Q5, the second end and the 5th of the 15th resistance R15
The source electrode of switching tube Q5 is connected to ground altogether, and the first end of the 14th resistance R14 is the first end of the 5th switch subelement 421, and the tenth
The drain electrode of the second the 5th switching tube Q5 of termination of four resistance R14.
In a particular application, the 5th switching tube Q5 is NMOS tube.
In one embodiment, the 6th switch subelement 422 includes the 17th resistance R17, the 18th resistance R18 and the 6th
Switching tube Q6.
The controlled end that the first end of 18th resistance R18 switchs subelement 422 for the 6th, the second of the 18th resistance R18
End connects altogether with the first end of the 17th resistance R17 and the grid of the 6th switching tube Q6, the second end and the 6th of the 17th resistance R17
The source electrode of switching tube Q6 is connected to ground altogether, and the drain electrode of the 6th switching tube Q6 is the first end of the 6th switch subelement 422.
In a particular application, the 6th switching tube Q6 is NMOS tube.
In one embodiment, the 7th switch subelement 423 includes eleventh resistor R11, twelfth resistor R12, the tenth
Three resistance R13, the second diode D2, the second optocoupler U2 and the 7th switching tube Q7.
The first end of eleventh resistor R11 and the first end of twelfth resistor R12 connect to form the 7th switch subelement 423 altogether
Current input terminal and the first output end, the second end of eleventh resistor R11 is the first driving of the 7th switch subelement 423
End, the positive input of the second optocoupler U2 are the power end of the 7th switch subelement 423, and the negative input of the second optocoupler U2 is
The controlled end of 7th switch subelement 423, the second end of twelfth resistor R12, the positive output end of the second optocoupler U2, the 7th open
The cathode of the collector and the second diode D2 that close pipe Q7 connects to form the 7th second output terminal for switching subelement 423 altogether, and second
The negative sense output end of optocoupler U2 connects altogether with the base stage of the 7th switching tube Q7 and the first end of thirteenth resistor R13, the 7th switching tube
The anode of the emitter of Q7 and the second end of thirteenth resistor R13 and the second diode D2 connect to form the 7th switch subelement altogether
423 the second driving end.
In a particular application, the 7th switching tube Q7 is switching transistor.
In one embodiment, the 8th switch subelement 424 includes the 8th switching tube Q8.The source electrode of 8th switching tube Q8,
First end, controlled end and the second end of grid and drain electrode respectively with the 8th switch subelement 424 correspond.
In a particular application, the 8th switching tube Q8 is PMOS tube.
The working principle of the utility model embodiment are as follows: when third control signal B1 is high level, the 4th control signal
B2 is low level, and the 5th switching tube Q5 is connected, the 6th switching tube Q6 cut-off, the second optocoupler U2 work, the 7th switching tube Q7 conducting,
The 8th switching tube Q8 is connected, at this time the current output terminal output constant current signal Ic of second switch switch unit 420.When third control
When signal B1 processed is low level, the 4th control signal B2 is high level, and the 5th switching tube Q5 ends, the 6th switching tube Q6 conducting,
Second optocoupler U2 do not work, the 7th switching tube Q7 cut-off, the 8th switching tube Q8 cut-off, at this time second switch switch unit 420
Current output terminal ground connection.
To sum up, the integrated circuit course of work in Fig. 2 includes:
First state: when first control signal A1 is high level, second control signal A2 is low level, and third controls signal
B1 is low level, and the 4th control signal B2 is high level, the 4th switching tube Q4 conducting, the 8th switching tube Q8 cut-off, the 6th switch
Pipe Q6 conducting, constant current signal Ic flows into the first pole A of load electrode 500 by the 4th switching tube Q4, and flows out from the second pole B,
It is grounded by the 6th switching tube Q6.
Second state: when first control signal A1 is low level, second control signal A2 is high level, and third controls signal
B1 is high level, and the 4th control signal B2 is low level, second switch Q2 conducting, the 4th switching tube Q4 cut-off, the 8th switch
Pipe Q8 conducting, constant current signal Ic flows into the second pole B of load electrode 500 by the 8th switching tube Q8, and flows out from the first pole A,
It is grounded by second switch Q2.
Control module 100 is controlled above-mentioned control signal and is alternately cut between the first state and a second state with predeterminated frequency
It changes, to realize the alternating variation of current direction in load electrode 500.
Fig. 3 shows the circuit structure of isolated buck module 200 provided by an embodiment of the present invention, is described in detail such as
Under:
As shown in figure 3, the isolated buck module 200 in Fig. 1 includes isolation electricity in one embodiment of the utility model
Source unit U3.
The power end of isolated power supply unit U3, positive output end and negative sense output end respectively with isolated buck module 200
Power end, the first output end and second output terminal correspond.
Second direct current includes forward signal VO+ and negative-going signal VO-.
Isolated power supply unit U3 accesses the first direct current VCC, and output is positive respectively after signal isolation and decompression processing
Signal VO+ and negative-going signal VO-.
In one embodiment, isolated buck module 200 further includes first capacitor C1 and the second capacitor C2.First capacitor C1
It connects between the power end and ground terminal of isolated power supply unit U3, the ground terminal ground connection of isolated power supply unit U3, the second capacitor C2
It connects between the positive output end and negative sense output end of isolated power supply unit U3.
In one embodiment, isolated power supply unit U3 includes the DC power supply device of model NN1-24S05.
Isolated power supply unit is used in the present embodiment, it can be to the 4th switching tube Q4 and the in electrode drive module 400
Eight switching tube Q8 provide the driving voltage to suspend over the ground.
Fig. 4 shows the circuit structure of constant current source module 300 provided by an embodiment of the present invention, and details are as follows:
As shown in figure 4, the constant current source module 300 in Fig. 1 includes input filter in one embodiment of the utility model
Unit 310, constant current driving unit 320, switch control unit 330 and constant current output unit 340.
The input terminal of input filter unit 310 be constant current source module 300 input terminal, the first of input filter unit 310
The first end of output termination switch control unit 330, the second output terminal of input filter unit 310 connect constant current driving unit 320
Power end, constant current driving unit 320 output driving termination switch control unit 330 controlled end, constant current driving unit 320
The first current sampling port connect altogether with the second end of switch control unit 330 and the input terminal of constant current output unit 340, constant current drive
The second current sampling port and ground terminal of moving cell 320 are connected to ground altogether, and the output end of constant current output unit 340 is constant current source module
Output end.
As shown in figure 4, in one embodiment, input filter unit 310 includes third capacitor C3, the 4th capacitor C4, the
Five capacitor C5, the 20th resistance R20 and third diode D3.
The anode of the first end of third capacitor C3, the first end of the 4th capacitor C4 and third diode D3 connects to form input altogether
The input terminal of filter unit 310 and the first output end.The second end of third capacitor C3 and the second end of the 4th capacitor C4 are grounded,
The cathode of third diode D3 connects the first end of the 20th resistance R20, and the second end of the 20th resistance R20 is with the 5th capacitor C5's
First end connects the second output terminal to form input filter unit 310, the second end ground connection of the 5th capacitor C5 altogether.
As shown in figure 4, in one embodiment, constant current driving unit 320 includes model QX6103 constant-flow driver U4.
As shown in figure 4, in one embodiment, switch control unit 330 includes the 9th switching tube Q9.9th switching tube Q9
Drain electrode, source electrode and grid respectively with the first end, second end and controlled end of switch control unit 330 correspond.
As shown in figure 4, in one embodiment, constant current output unit 340 includes the 21st resistance R21, the 22nd
Resistance R22, the 23rd resistance R23, the first inductance L1, the second inductance L2, the 6th capacitor C6, the 7th capacitor C7, the four or two pole
Pipe D4 and the 5th diode D5.
The cathode of the first end of 21st resistance R21, the first end of the 22nd resistance R22 and the 4th diode D4 is total
Connect the input terminal to form constant current output unit 340, second end, the second end of the 22nd resistance R22 of the 21st resistance R21
It is connected to ground, the second end of the first inductance L1, the first end of the 6th capacitor C6, the 23rd electricity altogether with the first end of the first inductance L1
The first end of the first end and the second inductance L2 that hinder R23 connects altogether, the second end of the second inductance L2 and the anode of the 5th diode D5
The output end to form constant current output unit 340 is connect altogether, and the cathode of the 5th diode D5 connects the first end of the 7th capacitor C7, the 6th electricity
The second end for holding the second end of C6, the second end of the 23rd resistance R23, the anode of the 4th diode D4 and the 7th capacitor C7 is equal
Ground connection.
Constant current driving unit 320 in the present embodiment is that high side current detects constant-current source, it can be ensured that load electrode etc.
Impedance is imitated when larger range changes, constant output current is constant, in case load electrode overcurrent is burnt.It may be implemented when first is straight
When the voltage of galvanic electricity VCC changes with load, constant current source module 300 can normal driving work.
In one embodiment of the utility model, the control circuit of falling pole in Fig. 1 further includes for exporting the first direct current
The power module of electric VCC.
In one embodiment of the utility model, the control circuit of falling pole in Fig. 1 further includes voltage transformation module.Voltage
Conversion module is connect with electrode drive module 400 and control module 100 respectively.
Voltage transformation module exports power supply signal+5V respectively to electrode drive module 400 and control module 100.
In one embodiment of the utility model, the control circuit of falling pole in Fig. 1 further includes connecting with control module
Master switch module, master switch module output switching signal to control module 100, to open or close control module 100.
In one embodiment, master switch module is connect with power module, master switch module output switching signal to power supply
Module, to control opening or closing for power module.
The utility model embodiment additionally provides a kind of water purifier, connected including load electrode and with load electrode as
The upper control circuit of falling pole.
It should be noted that the identical port of label or pin are to be connected in the utility model the description and the appended drawings.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (10)
1. a kind of control circuit of falling pole, which is characterized in that including control module, isolated buck module, constant current source module and electrode
Drive module；
The output of the control module terminates the control terminal of the electrode drive module, the output termination of the isolated buck module
The driving end of the electrode drive module, the first input end of the output end of the constant current source module and the electrode drive module
It is connect altogether with the second input terminal, the first output end of the electrode drive module and the first pole of load electrode connect, the electrode
The second output terminal of drive module is connect with the second pole of the load electrode；
The control module outputs control signals to the electrode drive module；
The isolated buck module accesses the first direct current, carries out signal isolation to first direct current and decompression handles to obtain
Second direct current, and by the second direct current electricity output to the electrode drive module；
The constant current source module accesses first direct current and obtains constant current signal, and the constant current signal is exported to the electricity
Pole drive module makes the electrode drive module export the constant current signal；
The electrode drive module controls its first input end and the conducting of the first output end, the second input according to the control signal
End and second output terminal disconnection or first input end and the first output end disconnect, the second input terminal and second output terminal are connected.
2. the control circuit of falling pole as described in claim 1, which is characterized in that the electrode drive module includes that first switch is cut
Change unit and second switch switch unit；
The first control terminal and the second control terminal of the first switch switch unit are respectively the first of the electrode drive module
Control terminal and the second control terminal；The first control terminal and the second control terminal of the second switch switch unit are respectively the electrode
The third control terminal and the 4th control terminal of drive module；
First driving end of the first switch switch unit and the first driving end of the second switch switch unit connect shape altogether
End, the second driving end of the first switch switch unit and the second switch are driven at the first of the electrode drive module
Second driving end of switch unit connects the second driving end to form the electrode drive module altogether；
The current input terminal of the first switch switch unit is the first input end of the electrode drive module, and described first opens
The current output terminal for closing switch unit is the first output end of the electrode drive module；
The current input terminal of the second switch switch unit is the second input terminal of the electrode drive module, and described second opens
The current output terminal for closing switch unit is the second output terminal of the electrode drive module.
3. the control circuit of falling pole as claimed in claim 2, which is characterized in that the first switch switch unit is opened including first
Climax unit, second switch subelement, third switch subelement and the 4th switch subelement；
The controlled end of the first switch subelement is the first control terminal of the first switch switch unit, the first switch
The controlled end of first termination of the subelement third switch subelement, the power end of the third switch subelement, first drive
The power end of moved end, the second driving end and current input terminal and the first switch switch unit, the first driving end, the second driving
End and current input terminal correspond, and the first output end and second output terminal of third switch subelement are respectively with described the
The first end and controlled end of four switch subelements connect one to one, and the controlled end of the second switch subelement is described first
Second control terminal of switch switching unit, the second of the first end of the second switch subelement and the 4th switch subelement
End connects the current output terminal to form the first switch switch unit altogether.
4. the control circuit of falling pole as claimed in claim 2, which is characterized in that the second switch switch unit is opened including the 5th
Climax unit, the 6th switch subelement, the 7th switch subelement and the 8th switch subelement；
The controlled end of the 5th switch subelement is the first control terminal of the second switch switch unit, the 5th switch
The controlled end of first termination of subelement the 7th switch subelement, the power end of the 7th switch subelement, first drive
The power end of moved end, the second driving end and current input terminal and the second switch switch unit, the first driving end, the second driving
End and current input terminal correspond, and the first output end and second output terminal of the 7th switch subelement are respectively with described the
The first end and controlled end of eight switch subelements connect one to one, and the controlled end of the 6th switch subelement is described second
Second control terminal of switch switching unit, the second of the first end of the 6th switch subelement and the 8th switch subelement
End connects the current output terminal to form the second switch switch unit altogether.
5. the control circuit of falling pole as described in claim 1, which is characterized in that the isolated buck module includes isolated power supply list
Member；
The power end of the isolated power supply unit, positive output end and negative sense the output end electricity with the isolated buck module respectively
Source, the first output end and second output terminal correspond；
Second direct current includes forward signal and negative-going signal；
Described in the isolated power supply unit access first direct current exports respectively after signal isolation and decompression processing
Forward signal and the negative-going signal.
6. the control circuit of falling pole as described in claim 1, which is characterized in that the constant current source module includes input filter list
Member, constant current driving unit, switch control unit and constant current output unit；
The input terminal of the input filter unit is the input terminal of the constant current source module, and the first of the input filter unit is defeated
The first end of the switch control unit is terminated out, and the second output terminal of the input filter unit connects the constant current driving unit
Power end, the output driving of the constant current driving unit terminates the controlled end of the switch control unit, the constant current driving
First current sampling port of unit and the input terminal of the second end of the switch control unit and the constant current output unit connect altogether,
The second current sampling port and ground terminal of the constant current driving unit are connected to ground altogether, and the output end of the constant current output unit is institute
State the output end of constant current source module.
7. the control circuit of falling pole as described in claim 1, which is characterized in that further include for exporting first direct current
Power module.
8. the control circuit of falling pole as described in claim 1, which is characterized in that further include voltage transformation module；The voltage turns
Mold changing block is connect with the electrode drive module and the control module respectively；
The voltage transformation module output power supply signal is respectively to the electrode drive module and the control module.
9. the control circuit of falling pole as claimed in any one of claims 1 to 8, which is characterized in that further include and the control module
The master switch module of connection, the master switch module output switching signal to the control module.
10. a kind of water purifier, which is characterized in that connected including load electrode and with the load electrode such as claim 1
To 9 described in any item control circuits of falling pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134820.3U CN208292715U (en) | 2018-01-26 | 2018-01-26 | One kind falling pole control circuit and water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134820.3U CN208292715U (en) | 2018-01-26 | 2018-01-26 | One kind falling pole control circuit and water purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208292715U true CN208292715U (en) | 2018-12-28 |
Family
ID=64697166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820134820.3U Active CN208292715U (en) | 2018-01-26 | 2018-01-26 | One kind falling pole control circuit and water purifier |
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| Country | Link |
|---|---|
| CN (1) | CN208292715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314146A (en) * | 2018-01-26 | 2018-07-24 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
-
2018
- 2018-01-26 CN CN201820134820.3U patent/CN208292715U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314146A (en) * | 2018-01-26 | 2018-07-24 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
| CN108314146B (en) * | 2018-01-26 | 2024-01-05 | 深圳安吉尔饮水产业集团有限公司 | Reverse pole control circuit and water purifier |
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