CN107328110A - Pulsed water outlet power-off control circuit - Google Patents
Pulsed water outlet power-off control circuit Download PDFInfo
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- CN107328110A CN107328110A CN201710621357.5A CN201710621357A CN107328110A CN 107328110 A CN107328110 A CN 107328110A CN 201710621357 A CN201710621357 A CN 201710621357A CN 107328110 A CN107328110 A CN 107328110A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- Chemical & Material Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Control field is powered off the present invention relates to water outlet of water heater, specifically related to pulsed water outlet power-off control circuit, MCU and power supply VCC and VDD including SECO, water flow sensing unit is electrically connected in the MCU, temperature sensor, zero sequence electric leakage self-inspection protection module, IPE electric leakage self-inspection protection modules, high low pressure detection module, dead electricity detection module, communicate expansion interface and operation display interface, the operation display interface is electrically connected with man-machine interface, relay RL1 and relay RL2 is electrically connected by driving 1 in the MCU, the MCU is electrically connected with relay RL3 by driving 2, the MCU is electrically connected with relay RL4 by driving 3；Ground wire PE loops of the present invention are solved ground wire and disconnected using magnetic freeze mode time pulse relay meets national standard compulsive requirement, also possesses the resistance detection feature of PE loop contact resistances.
Description
Technical field
Control field is powered off the present invention relates to the water outlet of electric heater, and in particular to pulsed water outlet power-off control circuit.
Background technology
The extremely full pole of water outlet power down function load three disconnects, and only only has earth leakage protective device plug to possess this function at present, because of leakage
Electric protection plug only limits creepage protection function and does expanded application into water outlet power-off protection, other panel operation functions, temperature setting
Function, timer reservation function, Multi-tube heating function etc. can not be realized in earth leakage protective device.In order to solve water outlet power down function
Functional requirement above is met simultaneously, and the present invention proposes more effective way to realize above-mentioned deficiency, and electric heater is reached with this
Realize that global function is applied and improves load break-make service life.
The content of the invention
The problem of existing for prior art, solves the extremely full pole of existing water outlet power down function load three and disconnects, at present
Only only have earth leakage protective device plug to possess this function, expanded application is done into water outlet because leakage protecting plug only limits creepage protection function
Power-off protection, other panel operation functions, temperature setting function, timer reservation function, Multi-tube heating function etc. can not be in leakages
The problem of being realized in non-electricity protector, is related to pulsed water outlet power-off control circuit the invention provides one kind.
Concrete technical scheme is as follows：
Pulsed water outlet power-off control circuit, includes the MCU and power supply VCC and VDD of SECO, the MCU
Be electrically connected water flow sensing unit, temperature sensor, zero sequence electric leakage self-inspection protection module, IPE electric leakage self-inspections protection module,
High low pressure detection module, dead electricity detection module, communication expansion interface and operation display interface, the operation display interface electricity
Property connection man-machine interface, relay RL1 and relay RL2 is electrically connected by driving 1 in the MCU, and the MCU, which passes through, to be driven
Dynamic 2 are electrically connected with the break-make that relay RL3, the MCU are electrically connected with relay RL4, RL1 control live wire Lo by driving 3,
RL1 control zero lines No break-make, RL3 and RL4 control ground wires Eo break-make；And the RL3 and RL4 is magnetic freeze mode pulse
Relay；
It is preferred that, after energization, tap is opened, when the water flow sensing unit detects water flowing, output signal is through described
After MCU processing, make RL1, RL2 synchronously disconnection from the I pin of MCU output low level by the driving 1, arrange according to program
MCU G pin export 1 pulse high level after delay makes RL4 driving disconnections, now, load outputs by the driving 3：Lo、
The pole of No, Eo tri- presents and is fully disconnected state；
It is preferred that, after tap is closed, the water flow sensing unit can't detect water-flow signal, prolong through the MCU system
Shi Hou, the MCU H pin export 1 pulse high level makes RL3 drive adhesive by the driving 2, through prolonging that program is arranged
When after MCU I pin output high level the synchronous adhesive of RL1, RL2, load outputs are made by driving 1：The pole of Lo, No, Eo tri- is presented
Fully closed condition, load obtains electricity and continues to heat, so circulation；
It is preferred that, the zero sequence electric leakage self-inspection protection module includes the self-inspection driving 1 being electrically connected with the MCU and zero sequence
Amplification module and the ZCT ZCT1 for being electrically connected with self-inspection driving 1 and zero sequence amplification module；Go up electric or persistently lead to for the first time
Electricity condition, according to setting from the high level of MCU D pin output system designated times, through self-inspection driving 1, circle is wound on ZCT1 mutual inductance lines
P-wire in circle will produce the electric current of the equivalent specified zero sequence leakage current value size of a simulation, now, if detection of electrical leakage is returned
Road normally wherein includes zero sequence amplification module, then produces an electric leakage signal in MCU volume C pin, and the signal judges effective through MCU
Perform different command respectively afterwards：If self-inspection is normal, system performs work at present according to pre-set programs, if self-inspection is abnormal, from
MCU I pin output low level makes RL1, RL2 synchronously disconnection by driving 1, and MCU G pin export 1 arteries and veins after system agreement delay
Level of leaping high makes RL4 driving disconnections, now, load outputs by driving 3：The pole of Lo, No, Eo tri- presents and is fully disconnected state,
System alarm shows that zero sequence electric leakage self-inspection is abnormal；Load that Lo, No loop current are not equal to zero and to meet system pre- during working condition
If during leakage current, after ZCT1 zero sequence current mutual inductors amplify output signal through zero sequence, the C pin through MCU produce an electric leakage
Signal, now, MCU I pin output low level make RL1, RL2 synchronously disconnection, and MCU G pin export 1 arteries and veins after system agreement delay
Level of leaping high makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state, system alarm
Show that zero sequence electric leakage is abnormal；
It is preferred that, the IPE electric leakage self-inspections protection module includes being electrically connected with the PE amplification modules of the MCU, self-inspection drive
Dynamic 2, be electrically connected with the ground wire transformer ZCT2 of the PE amplification modules and self-inspection driving 2, be electrically connected with the MCU every
From module and with the isolation module be electrically connected with E-N voltage modules, the E-N voltage modules be used for detect zero line and
Terminal voltage between ground wire；First upper electricity or when continuing "on" position, system is according to setting from the MCU_F pin output system designated times
High level, through self-inspection driving 2, circle, which is wound on p-wire in ZCT2 mutual inductors, will produce the equivalent specified ground wire leakage of a simulation
The electric current of electric current value size, now, if leakage detecting circuit normally wherein includes PE amplification modules, is produced in MCU E pin
A raw electric leakage signal, the signal performs different command respectively after judging effectively through MCU：Self-inspection is normal, then system is according to default journey
Sequence performs work at present；If self-inspection is abnormal, make RL1, RL2 synchronously disconnection, system agreement from MCU I pin output low level
After delay, MCU G pin, which export 1 pulse high level, makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- is in
State is now fully disconnected, system alarm shows that ground wire electric leakage self-inspection is abnormal；During energization working condition, E-N voltage modules are detected
When E-N terminal voltages are more than systemic presupposition value, the voltage is sent to MCU B pin through isolation module, after being recognized through MCU, automatic to judge
The PE ground line current values of IPE (ZCT2) transformer detection, when there is the ground line current more than systemic presupposition, send through PE amplification modules
Enter MCU E pin, now, MCU I pin output low level makes RL1, RL2 synchronously disconnection, arranges the G pin of MCU after delay according to program
1 pulse high level of output makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state,
System alarm shows that ground wire electric leakage is abnormal；
It is preferred that, the control circuit has high voltage protective function, during "on" position, when VCC power supplys sampling terminal voltage is higher than
During 280v, high low pressure detection module by this voltage send into MCU J pin, through MCU anti-interferences filtering identification effectively after, when load this
When body is off, then secondary upper electricity is not allowed, when loading in an ON state, MCU I pin output low level makes
RL1, RL2 synchronously disconnect, and MCU G pin, which export 1 pulse high level, after system agreement delay makes RL4 driving disconnections, now, bears
Carry output end：The pole of Lo, No, Eo tri- presents and is fully disconnected state；When voltage is less than 270v, system performs upper Electricity Functional automatically,
That is the H pin of MCU, which export 1 pulse high level, makes RL3 drive adhesive, and MCU I pin output high level makes after arranging delay through system
RL1, RL2 synchronization adhesive, load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-；The control circuit has low pressure guarantor
Protective function, during "on" position, when VCC power supplys sampling terminal voltage is less than 170v, high low pressure detection module sends into this voltage
MCU J pin, after MCU anti-interferences filtering identification effectively, if load is off in itself, secondary upper electricity is not allowed, if
When loading in an ON state, MCU I pin output low level makes RL1, RL2 synchronously disconnection, MCU G pin after system agreement is delayed
1 pulse high level of output makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state；
When voltage is higher than 180v, 1 pulse high level of H pin output that system performs automatic upper Electricity Functional, i.e. MCU makes RL3 driving suctions
Close, MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs after arranging delay through system：Lo, No, Eo tri-
Fully closed condition is presented in pole；
It is preferred that, the control circuit has a loss protecting function, and dead electricity includes that Plug contact is bad and power phase shortage position two
The situation of kind, carries out power down using the storage capacitor of power supply VCC ends, power supply vdd terminal and maintains the MCU short time to work."on" position, when
When VCC power supplys sample the terminal voltage continuous system designated time without output, this feature is input to MCU after being recognized by dead electricity detection module
A pin, after judging through MCU identification filtering, make RL1, RL2 synchronously disconnection, system agreement delay from MCU I pin output low level
MCU G pin, which export 1 pulse high level, afterwards makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- has been presented
Full off-state；After power up, MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive, arranges to be delayed through system
MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs afterwards：Complete closed form is presented in the pole of Lo, No, Eo tri-
State；
It is preferred that, the control circuit has temperature control function, during "on" position, load-relay RL1, RL2, RL3,
RL4 adhesives, Lo, No, Eo power supply output, machine is in heated condition, and when temperature reaches systemic presupposition temperature, MCU I pin are defeated
Going out low level makes RL1, RL2 synchronously disconnection, and MCU G pin, which export 1 pulse high level, after system agreement delay makes RL4 drivings disconnected
Open, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state.When temperature is less than design temperature, MCU H
Pin, which exports 1 pulse high level, makes RL3 drive adhesive, and MCU I pin output high level makes RL1, RL2 after arranging delay through system
Synchronous adhesive, load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-, and machine continues to heat, so circulation；
It is preferred that, the control circuit has a communication expansion interface control function, including heating immediately, timer reservation and remote
Process control function, the company's of energization network state, when man-machine interface manipulation sends heating instructions, communicates expansion interface both-way communication mould
Block is detected after signal, and current state instruction is sent through MCU processing, and when instruction is heating instructions, MCU H pin export 1 arteries and veins
Level of leaping high makes RL3 drive adhesive, and MCU I pin output high level makes the synchronous adhesive of RL1, RL2 after arranging delay through system, bears
Carry output end：Complete closure is presented in the pole of Lo, No, Eo tri-, and machine is in heated condition；When sending stopping heating instructions, MCU's
I pin output low level makes RL1, RL2 synchronously disconnection, and MCU G pin, which export 1 pulse high level, after system agreement delay drives RL4
Dynamic circuit breaker is opened, now, load outputs：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and machine stops heating；Remote control takes
Certainly in man-machine interface operating function；
It is preferred that, the control circuit has the PE ground wires i.e. function of E-Eo forced closeds operation, long during any "on" position
During by key system designated time in man-machine interface, now, MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive,
E-Eo is remained turned on；This state maintains the system designated time on the premise of not powering off, if breaking within the system designated time
Electric then be held permanently in on-state, the situation can detect the internal resistance between ground wire E-Eo, if more than the system designated time with
On remain at "on" position, aforesaid operations function will automatically terminate and perform preset program automatically according to system current state.
Beneficial effect：
Compared with existing water outlet power-off control, the present invention possesses the function of all leakage protecting plugs.Ground wire PE is returned
Road is solved ground wire and disconnected using magnetic freeze mode time pulse relay meets national standard compulsive requirement, also possesses PE loop contact resistances
Resistance detection feature, have simultaneously：Mechanical structure is simple, and contact is extended not using Control long lifespan, control function
Limited, do not limited by system power supply load capacity by volume and circuit board, not limited etc. and influence by mechanical structure action abrasion.This
Control method is that electric controller is hidden in inside machine, solves overall appearance and installation question.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1：The water outlet power-off complete machine structure schematic diagram of the present invention；
Fig. 2：Pulsed water outlet power-off control block when the present invention is double magnetic freeze mode time pulse relay；
Fig. 3：The water outlet power-off flow chart of the present invention；
Fig. 4：The automatic electric flow chart of the present invention；
Fig. 5：The zero sequence electric leakage self-inspection flow chart of the present invention；
Fig. 6：The IPE electric leakage self-inspection flow charts of the present invention；
Fig. 7：The IPE earth leakage protective flow charts of the present invention；
Fig. 8：The loss protecting flow chart of the present invention；
Fig. 9：The PE ground wire forced closed operational flowcharts of the present invention；
Figure 10：Water outlet power-off control block when the present invention is single magnetic freeze mode time pulse relay.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in the embodiment of the present invention
Technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than entirely
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not under the premise of creative work is made
It can not obtain.
Pulsed water outlet power-off control circuit, includes the MCU and power supply VCC and VDD of SECO, the MCU
Be electrically connected water flow sensing unit, temperature sensor, zero sequence electric leakage self-inspection protection module, IPE electric leakage self-inspections protection module,
High low pressure detection module, dead electricity detection module, communication expansion interface and operation display interface, the operation display interface electricity
Property connection man-machine interface, by driving 1 relay RL1 and relay RL2 is electrically connected in the MCU, and the MCU passes through
Driving 2 is electrically connected with the break-make that relay RL3, the MCU are electrically connected with relay RL4, RL1 control live wire Lo by driving 3,
RL1 control zero lines No break-make, RL3 and RL4 control ground wires Eo break-make, and the RL3 and RL4 is magnetic freeze mode pulse
Relay.The zero sequence electric leakage self-inspection protection module includes the self-inspection driving 1 being electrically connected with the MCU and zero sequence amplification module
And it is electrically connected with the ZCT ZCT1 of self-inspection driving 1 and zero sequence amplification module.The IPE electric leakages self-inspection protection module bag
Include the PE amplification modules for being electrically connected with the MCU, self-inspection driving 2, be electrically connected with the PE amplification modules and self-inspection driving 2
Ground wire transformer ZCT2, the E-N voltages that are electrically connected with the isolation module of the MCU and are electrically connected with the isolation module
Module, the E-N voltage modules are used for detecting the terminal voltage between zero line and ground wire.The present invention is double using above-mentioned RL3 and RL4
Magnetic keeps time pulse relay control, such as Fig. 2.Time pulse relay control can also be kept using single magnetic, is protected when using single magnetic
Control block when holding time pulse relay control is as shown in Figure 10, when electric current is from the flow direction of driving 2 driving 3, then RL3 adhesives,
When electric current is from the flow direction of driving 3 driving 2, then RL3 disconnects.
The pulsed water outlet power-off control circuit has following functions：
First, water outlet power down function：
After energization, tap is opened, when the water flow sensing unit detects water flowing, output signal is through the MCU processing
Afterwards, RL1, RL2 synchronously disconnection are made from the I pin of MCU output low level by the driving 1, according to the delay of program agreement (such as：
After 5ms), MCU G pin export 1 pulse high level makes RL4 driving disconnections, now, load outputs by the driving 3：
The pole of Lo, No, Eo tri- presents and is fully disconnected state, serves the purpose of water outlet power-off.
2nd, Electricity Functional is gone up automatically：
After tap is closed, the water flow sensing unit can't detect water-flow signal, through MCU system delay (such as：
After 30s), the H pin of the MCU export 1 pulse high level makes RL3 drive adhesive by the driving 2, arranges through program
Delay is (such as：After 5ms), MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs by driving 1：Lo、No、
Fully closed condition is presented in the poles of Eo tri-, and load obtains electricity and continues to heat, so circulation.
3rd, zero sequence electric leakage self-checking function：
First upper electricity continues "on" position, according to setting from MCU D pin output system designated times (such as：Height 30ms)
Level, through self-inspection driving 1, the p-wire that circle is wound in ZCT1 mutual inductors will produce the equivalent specified zero sequence electric leakage electricity of a simulation
The electric current of flow valuve size, now, if leakage detecting circuit normally wherein includes zero sequence amplification module, one is produced in MCU volume C pin
Individual electric leakage signal, the signal performs different command respectively after judging effectively through MCU：If self-inspection is normal, system is according to pre-set programs
Work at present is performed, if self-inspection is abnormal, makes RL1, RL2 synchronously disconnection from MCU I pin output low level by driving 1,
The delay of system agreement is (such as：5ms) MCU G pin 1 pulse high level of output makes RL4 driving disconnections by driving 3 afterwards, now, bears
Carry output end：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and system alarm shows that zero sequence electric leakage self-inspection is abnormal.
4th, zero sequence creepage protection function：
When load Lo, No loop current is not equal to zero and meets systemic presupposition leakage current during working condition, ZCT1 zero sequences
After current transformer amplifies output signal through zero sequence, the C pin through MCU produce an electric leakage signal, now, MCU I pin output
Low level makes RL1, RL2 synchronously disconnection, and the delay of system agreement is (such as：After 5ms), MCU G pin, which export 1 pulse high level, makes RL4
Driving disconnects, now, load outputs：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and system alarm shows that zero sequence electric leakage is different
Often.
5th, IPE electric leakages self-checking function：
First upper electricity or when continuing "on" position, system according to setting from the MCU_F pin output system designated times (such as：30ms)
High level, through self-inspection driving 2, circle, which is wound on p-wire in ZCT2 mutual inductors, will produce the equivalent specified ground wire leakage of a simulation
The electric current of electric current value size, now, if leakage detecting circuit normally wherein includes PE amplification modules, is produced in MCU E pin
One electric leakage signal, the signal performs different command respectively after judging effectively through MCU：Self-inspection is normal, then system is according to pre-set programs
Perform work at present；If self-inspection is abnormal, make RL1, RL2 synchronously disconnection from MCU I pin output low level, system agreement is prolonged
When (such as：5ms) MCU 1 pulse high level of G pin output makes RL4 driving disconnections, now, load outputs afterwards：Lo、No、Eo
The state that is fully disconnected is presented in three poles, and system alarm shows that ground wire electric leakage self-inspection is abnormal.
6th, IPE creepage protection functions：
During energization working condition, E-N voltage modules detect E-N terminal voltages more than systemic presupposition value (such as：, should when 36V)
Voltage is sent to MCU B pin through isolation module, after being recognized through MCU, and the PE ground wires electricity of IPE (ZCT2) transformer detection is judged automatically
Flow valuve, when have more than systemic presupposition ground line current (such as：When 30mA), MCU E pin, now, MCU are sent into through PE amplification modules
I pin output low level make RL1, RL2 synchronously disconnection, according to program arrange delay after MCU G pin export 1 pulse high level make
RL4 drivings disconnect, now, load outputs：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and system alarm shows ground wire electric leakage
It is abnormal.
7th, high voltage protective function：
During "on" position, when VCC power supplys sampling terminal voltage is higher than 280v, high low pressure detection module sends into this voltage
MCU J pin, after MCU anti-interferences filtering identification effectively, when load is off in itself, then do not allow secondary upper electricity, when
When loading in an ON state, MCU I pin output low level makes RL1, RL2 synchronously disconnection, and system agreement is delayed (such as：After 5ms)
MCU G pin, which export 1 pulse high level, makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- is presented breaks completely
Open state；When voltage is less than 270v, 1 pulse high level of H pin output that system performs automatic upper Electricity Functional, i.e. MCU makes
RL3 drives adhesive, and MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs after arranging delay through system：
Fully closed condition is presented in the pole of Lo, No, Eo tri-；
8th, low-voltage variation function：
During "on" position, when VCC power supplys sampling terminal voltage is less than 170v, high low pressure detection module sends into this voltage
MCU J pin, after MCU anti-interferences filtering identification effectively, if load is off in itself, secondary upper electricity is not allowed, if
When loading in an ON state, MCU I pin output low level makes RL1, RL2 synchronously disconnection, and system agreement is delayed (such as：After 5ms)
MCU G pin, which export 1 pulse high level, makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- is presented breaks completely
Open state；When voltage is higher than 180v, 1 pulse high level of H pin output that system performs automatic upper Electricity Functional, i.e. MCU makes
RL3 drives adhesive, through the delay of system agreement (such as：5ms) MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load afterwards
Output end：Fully closed condition is presented in the pole of Lo, No, Eo tri-.
9th, loss protecting function：
Dead electricity includes that Plug contact is bad and the two kinds of situations in power phase shortage position, utilizes power supply VCC ends, the storage of power supply vdd terminal
It can work the electric capacity progress power down maintenance MCU short time."on" position, when VCC power supplys are sampled the terminal voltage continuous system designated time
(such as：When 200ms) without output, this feature is input to MCU A pin after being recognized by dead electricity detection module, judges through MCU identification filtering
Afterwards, RL1, RL2 synchronously disconnection are made from MCU I pin output low level, the delay of system agreement is (such as：5ms) MCU G pin output afterwards
1 pulse high level makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state；Work as electricity
After source is recovered, MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive, through the delay of system agreement (such as：5ms) MCU afterwards
I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-；Realize
Automatically power off and upper Electricity Functional.
Tenth, temperature control function：
During "on" position, load-relay RL1, RL2, RL3, RL4 adhesive, the output of Lo, No, Eo power supply, machine, which is in, to be added
Warm status, when temperature reaches systemic presupposition temperature, MCU I pin output low level makes RL1, RL2 synchronously disconnection, system agreement
Delay is (such as：5ms) MCU 1 pulse high level of G pin output makes RL4 driving disconnections, now, load outputs afterwards：Lo、No、
The poles of Eo tri- present and are fully disconnected state.When temperature is less than design temperature (such as：4 degree) when, MCU H pin export the high electricity of 1 pulse
It is flat RL3 is driven adhesive, through the delay of system agreement (such as：5ms) MCU I pin output high level makes the synchronous adhesive of RL1, RL2 afterwards,
Load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-, and machine continues to heat, so circulation.
11：Communicate expansion interface control function：
Communication expansion interface control function is that WiFi control functions include heating, timer reservation and remote control work(immediately
Can, be powered even network state, when man-machine interface (such as：Mobile phone A PP) manipulation when sending heating instructions, communicates expansion interface (WiFi)
Both-way communication module is detected after signal, and current state instruction is sent through MCU processing, when instruction is heating instructions, MCU H
Pin, which exports 1 pulse high level, makes RL3 drive adhesive, through the delay of system agreement (such as：5ms) MCU I pin output high level makes afterwards
RL1, RL2 synchronization adhesive, load outputs：Complete closure is presented in the pole of Lo, No, Eo tri-, and machine is in heated condition；Stop when sending
Only during heating instructions, MCU I pin output low level makes RL1, RL2 synchronously disconnection, MCU G pin output 1 after system agreement delay
Individual pulse high level makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state, and machine stops
Only heat；Remote control depends on the operating function of man-machine interface and different external, such as：Infra-red remote control, can be used distant
Control device instruction is likewise supplied with above-mentioned control relay make-break operation function.
12, PE ground wires are the function of E-Eo forced closeds operation：
During any "on" position, the key system designated time in long-press man-machine interface is (such as：When 1.5s), now, MCU
H pin export 1 pulse high level and RL3 is driven adhesive, E-Eo remains turned on；This state is tieed up on the premise of not powering off
The system designated time is held, on-state is held permanently in if being powered off within the system designated time, the situation can detect ground wire
Internal resistance between E-Eo, if more than the system designated time (such as："on" position is remained at more than 20s), aforesaid operations function will
Automatically terminate and perform preset program automatically according to system current state.
Compared with existing water outlet power-off control, the present invention possesses the function of all leakage protecting plugs.Ground wire PE is returned
Road is solved ground wire and disconnected using magnetic freeze mode time pulse relay meets national standard compulsive requirement, also possesses PE loop contact resistances
Resistance detection feature, have simultaneously：Mechanical structure is simple, and contact is extended not using Control long lifespan, control function
Limited, do not limited by system power supply load capacity by volume and circuit board, not limited etc. and influence by mechanical structure action abrasion.This
Control method is that electric controller is hidden in inside machine, solves overall appearance and installation question.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. pulsed water outlet power-off control circuit, it is characterised in that：MCU and power supply VCC including SECO and
Water flow sensing unit, temperature sensor, zero sequence electric leakage self-inspection protection module, IPE electric leakage self-inspections is electrically connected in VDD, the MCU
Protection module, high low pressure detection module, dead electricity detection module, communication expansion interface and operation display interface, the operation show
Show that interface is electrically connected with man-machine interface, relay RL1 and relay RL2 is electrically connected by driving 1 in the MCU, described
MCU is electrically connected with relay RL3, the MCU by driving 2 and passes through electric connection relay RL4, RL1 the control live wire of driving 3 LO
Break-make, RL1 controls zero line NOBreak-make, RL3 and RL4 controls ground wire EOBreak-make, and the RL3 and RL4 be magnetic keep
Formula time pulse relay.
2. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：After energization, tap, institute are opened
When stating water flow sensing unit and detecting water flowing, after output signal is handled through the MCU, lead to from the I pin of MCU output low level
Crossing the driving 1 makes RL1, RL2 synchronously disconnection, and the G pin for arranging MCU after delay according to program export 1 pulse high level and pass through institute
Stating driving 3 makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state.
3. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：It is described after tap is closed
Water flow sensing unit can't detect water-flow signal, after being delayed through the MCU system, and the H pin of the MCU export 1 pulse high level
RL3 is set to drive adhesive by the driving 2, MCU I pin output high level is made by driving 1 after the delay that program is arranged
RL1, RL2 synchronization adhesive, load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-, and load obtains electricity and continues to heat, so
Circulation.
4. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The zero sequence electric leakage self-inspection protection
Module includes the self-inspection driving 1 being electrically connected with the MCU and zero sequence amplification module and is electrically connected with self-inspection driving 1 and zero sequence
The ZCT ZCT1 of amplification module；
First upper electricity continues "on" position, according to setting from the high level of MCU D pin output system designated times, is driven through self-inspection
Dynamic 1, the p-wire that circle is wound in ZCT1 mutual inductors will produce the electricity of the equivalent specified zero sequence leakage current value size of a simulation
Stream, now, if leakage detecting circuit normally wherein includes zero sequence amplification module, an electric leakage signal is produced in MCU volume C pin,
The signal performs different command respectively after judging effectively through MCU：If self-inspection is normal, system performs current work according to pre-set programs
Make, if self-inspection is abnormal, make RL1, RL2 synchronously disconnection, system agreement delay from MCU I pin output low level by driving 1
MCU G pin export 1 pulse high level afterwards makes RL4 driving disconnections, now, load outputs by driving 3：Lo, No, Eo tri-
The state that is fully disconnected is presented in pole, and system alarm shows that zero sequence electric leakage self-inspection is abnormal；
When load Lo, No loop current is not equal to zero and meets systemic presupposition leakage current during working condition, ZCT1 zero-sequence currents
After transformer amplifies output signal through zero sequence, the C pin through MCU produce an electric leakage signal, now, and MCU I pin export low electricity
Flat to make RL1, RL2 synchronously disconnection, MCU G pin, which export 1 pulse high level, after system agreement delay makes RL4 driving disconnections, this
When, load outputs：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and system alarm shows that zero sequence electric leakage is abnormal.
5. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The IPE electric leakages self-inspection protection
Module includes being electrically connected with the PE amplification modules of the MCU, self-inspection driving 2, be electrically connected with the PE amplification modules and it is described from
The ground wire transformer ZCT2 of inspection driving 2, the isolation module for being electrically connected with the MCU and it is electrically connected with the isolation module
E-N voltage modules, the E-N voltage modules are used for detecting the terminal voltage between zero line and ground wire；
During electric or lasting "on" position upper for the first time, system is according to the high level set from the MCU_F pin output system designated times, through certainly
Inspection driving 2, the p-wire that circle is wound in ZCT2 mutual inductors will produce the equivalent specified ground wire leakage current value size of a simulation
Electric current, now, if leakage detecting circuit normally wherein include PE amplification modules, MCU E pin produce one electric leakage letter
Number, the signal performs different command respectively after judging effectively through MCU：Self-inspection is normal, then system performs current work according to pre-set programs
Make；If self-inspection is abnormal, make RL1, RL2 synchronously disconnection from MCU I pin output low level, MCU G after system agreement delay
Pin, which exports 1 pulse high level, makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected shape
State, system alarm shows that ground wire electric leakage self-inspection is abnormal；
During energization working condition, when E-N voltage modules detect E-N terminal voltages more than systemic presupposition value, the voltage is through isolation mode
Block is sent to MCU B pin, after being recognized through MCU, and the PE ground line current values of IPE (ZCT2) transformer detection are judged automatically, are more than when having
During the ground line current of systemic presupposition, MCU E pin are sent into through PE amplification modules, now, MCU I pin output low level make RL1,
RL2 synchronously disconnects, and the G pin for arranging MCU after delay according to program, which export 1 pulse high level, makes RL4 driving disconnections, now, load
Output end：The state that is fully disconnected is presented in the pole of Lo, No, Eo tri-, and system alarm shows that ground wire electric leakage is abnormal.
6. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The control circuit has high pressure guarantor
Protective function, during "on" position, when VCC power supplys sampling terminal voltage is higher than 280v, high low pressure detection module sends into this voltage
MCU J pin, after MCU anti-interferences filtering identification effectively, when load is off in itself, then do not allow secondary upper electricity, when
When loading in an ON state, MCU I pin output low level makes RL1, RL2 synchronously disconnection, MCU G pin after system agreement is delayed
1 pulse high level of output makes RL4 driving disconnections, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state；
When voltage is less than 270v, 1 pulse high level of H pin output that system performs automatic upper Electricity Functional, i.e. MCU makes RL3 driving suctions
Close, MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs after arranging delay through system：Lo, No, Eo tri-
Fully closed condition is presented in pole；
The control circuit has low-voltage variation function, during "on" position, high/low when VCC power supplys sampling terminal voltage is less than 170v
Press detection module that this voltage is sent into MCU J pin, after MCU anti-interferences filtering identification effectively, if load is off in itself
When, then do not allow secondary upper electricity, if load in an ON state, MCU I pin output low level makes RL1, RL2 synchronously disconnection,
MCU G pin, which export 1 pulse high level, after system agreement delay makes RL4 driving disconnections, now, load outputs：Lo、No、Eo
Three poles present and are fully disconnected state；When voltage is higher than 180v, the H pin that system performs automatic upper Electricity Functional, i.e. MCU export 1
Pulse high level makes RL3 drive adhesive, and MCU I pin output high level makes the synchronous adhesive of RL1, RL2 after arranging delay through system,
Load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-.
7. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The control circuit has dead electricity guarantor
Protective function, dead electricity includes that Plug contact is bad and the two kinds of situations in power phase shortage position, utilizes power supply VCC ends, the energy storage of power supply vdd terminal
Electric capacity carries out power down and maintains the MCU short time to work."on" position, when VCC power supplys sampling the terminal voltage continuous system designated time without
During output, this feature is input to MCU A pin after being recognized by dead electricity detection module, after judging through MCU identification filtering, from MCU I
Pin output low level makes RL1, RL2 synchronously disconnection, and MCU G pin, which export 1 pulse high level, after system agreement delay drives RL4
Dynamic circuit breaker is opened, now, load outputs：The pole of Lo, No, Eo tri- presents and is fully disconnected state；After power up, MCU H pin output
1 pulse high level makes RL3 drive adhesive, and MCU I pin output high level makes RL1, RL2 synchronously suction after arranging delay through system
Close, load outputs：Fully closed condition is presented in the pole of Lo, No, Eo tri-.
8. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The control circuit has temperature control
Function processed, during "on" position, load-relay RL1, RL2, RL3, RL4 adhesive, Lo, No, Eo power supply output, machine is in heating
State, when temperature reaches systemic presupposition temperature, MCU I pin output low level makes RL1, RL2 synchronously disconnection, and system agreement is prolonged
When after MCU G pin export 1 pulse high level make RL4 driving disconnection, now, load outputs：The pole of Lo, No, Eo tri- has been presented
Full off-state.When temperature is less than design temperature, MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive, through system
MCU I pin output high level makes the synchronous adhesive of RL1, RL2, load outputs after agreement delay：The pole of Lo, No, Eo tri- presents complete
Closure state, machine continues to heat, so circulation.
9. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：There is the control circuit communication to expand
Open up interface control function, including heating, timer reservation and remote control function immediately, the company's of energization network state, when man-machine boundary
When face manipulation sends heating instructions, communication expansion interface both-way communication module is detected after signal, and current shape is sent through MCU processing
State is instructed, when instruction is heating instructions, and MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive, prolongs through system agreement
When after MCU I pin output high level make the synchronous adhesive of RL1, RL2, load outputs：Complete closure is presented in the pole of Lo, No, Eo tri-,
Machine is in heated condition；When sending stopping heating instructions, MCU I pin output low level makes RL1, RL2 synchronously disconnection, is
MCU G pin, which export 1 pulse high level, after system agreement delay makes RL4 driving disconnections, now, load outputs：Lo, No, Eo tri-
The state that is fully disconnected is presented in pole, and machine stops heating；Remote control depends on man-machine interface operating function.
10. pulsed water outlet power-off control circuit as claimed in claim 1, it is characterised in that：The control circuit is with having PE
Line is the function of E-Eo forced closeds operation, during any "on" position, during key system designated time in long-press man-machine interface,
Now, MCU H pin, which export 1 pulse high level, makes RL3 drive adhesive, and E-Eo is remained turned on；This state is not being powered off
Under the premise of maintain the system designated time, be held permanently in on-state if being powered off within the system designated time, the situation can be with
The internal resistance between ground wire E-Eo is detected, if more than the designated time remaining at "on" position more than system, aforesaid operations function will
Automatically terminate and perform preset program automatically according to system current state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710621357.5A CN107328110B (en) | 2017-07-27 | 2017-07-27 | Pulse type water outlet power-off control circuit |
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| CN201710621357.5A CN107328110B (en) | 2017-07-27 | 2017-07-27 | Pulse type water outlet power-off control circuit |
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Address after: 312000 No. 68 Xintao Road, Qixing Street, Xinchang County, Shaoxing City, Zhejiang Province Applicant after: Zhejiang Xintao Electronic Technology Co., Ltd. Address before: 312500 Xinchang County, Zhejiang Province, Tao Road, No. 68, No. Applicant before: Zhejiang Xin Tao electronics technology limited company |
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