CN206698448U - One kind can detect and eliminate faradic Pediluvium apparatus - Google Patents

Abstract

It can detect and eliminate faradic Pediluvium apparatus, including calandria, sensing power detection circuit, zero/live wire change-over circuit, Pediluvium apparatus control circuit and non-isolated AC D/C powers, calandria includes PTC power supplys pole plate and screen layer, sensing power detection circuit includes AC signal impedance conversion attenuation filter circuit, operational amplification circuit and single-chip microcomputer AC signal sample circuit, and zero/live wire change-over circuit includes single-chip microcomputer U1 and is connected to multiplex driver U3 zero/live wire relay change-over switch and reverse-blocking tetrode thyristor.Screen layer is connected into electric capacity C26 and reverse-blocking tetrode thyristor S1, sense power detection circuit and carry out signal data acquisition processing, single-chip microcomputer is after the completion of the front and rear induced signal collection of zero/live wire conversion and calculating, relay switching selection is carried out according to zero/live wire state, connect the controllable silicon of connection screen layer and zero line, the induced electricity of screen layer is discharged by zero line, Pediluvium apparatus induced electricity is eliminated using full power-off apparatus for fast switching, it is ensured that safe and reliable.

Description

One kind can detect and eliminate faradic Pediluvium apparatus

Technical field

Pediluvium apparatus technical field is the utility model is related to, is related to Pediluvium apparatus sensing electro-detection and a kind of device of elimination and side Method.

Background technology

Two electric appliances that commercially available Pediluvium apparatus belongs in Household electric appliance safety standard, without grounding requirement.But due to Pediluvium apparatus Need to heat water in use, and calandria is immersed directly in water in itself, so calandria and water shape Into distribution capacity caused by induced electricity can not effectively be eliminated by calandria earthing of casing mode, so as to contact water lavipeditum Person brings discomfort.In addition, after calandria long-term use under the high temperature conditions, its insulating properties will be gradually reduced, housing It may be got rusty because of oxidation, the potential safety hazard such as breakage, thing followed electric leakage, water inlet can be produced when serious also will increasingly Greatly, this being adopted an effective measure, to be taken precautions against be necessary.

The content of the invention

The purpose of this utility model is triggered to effectively reduce or eliminate induced electricity in Pediluvium apparatus water or electric leakage Human body discomfort or human safety issues.

To achieve the above object, and in view of two electric appliances in Household electric appliance safety standard there is no the feelings of grounding requirement Condition, it is necessary between heater and shell middle installation metal screen layer：By measuring the size of screen layer induced voltage, judge to connect Enter whether AC power order meets the requirements, and according to circumstances carry out internal adjustment；Screen layer is controlled with supplying by electronic switch The access of electric line zero line, the induced electricity in screen layer or electric leakage can be discharged by zero line when needing.This reality Seek a kind of simple, reliable, practical unique solution method with new be that, accurate judgement plug inserts electricity with any direction The zero live wire order at source moment, so as to carry out accommodation, meet the needs subsequently powered, and finally obtain shielding layer charge With release.

One kind can detect and eliminate faradic Pediluvium apparatus, including calandria, sensing power detection circuit, the conversion of zero/live wire Circuit, Pediluvium apparatus control circuit and non-isolated AC-D/C power, it is characterized in that：The calandria includes PTC heated die plates and gold Belong to screen layer；The sensing power detection circuit includes AC signal impedance conversion attenuation filter circuit, operational amplification circuit, monolithic Machine AC signal sample circuit；Zero/live wire change-over circuit includes single chip machine controlling circuit, multi-channel driver circuit, zero/live wire Relay change-over switch and control machines switch；The input connection metal screen layer of the sensing power detection circuit, it is described The input connection single-chip microcomputer AC signal sample circuit of zero/live wire change-over circuit, the output end of zero/live wire change-over circuit Connect zero/live wire relay change-over switch and control machines switch.

Pediluvium apparatus controls and display circuit also includes calandria, massage control system of switching on or off electricity, the control of LED digital-scroll techniques.Entering During row sensing electro-detection and control adjustment, the control function such as calandria, massage needs Close All.Turn controlling zero/live wire During changing relay switching, in order to which the electric energy storage, LED digital-scroll techniques etc. for maintaining scm software to run needs Close All.

The non-isolated AC-DC power supplys include AC-220V power inputs, secondary filter circuit, have DC-12V outputs Non-isolation DC-DC bucks and its peripheral cell.DC-12V DC output powers be available for zero/live wire of driving switching after Electric apparatus coil, heating relay coil etc., the DC-12V power supplys can be follow-up single-chip microcomputer, aobvious after being depressurized to DC-5V again Show, the circuit such as temperature acquisition sensor, alternating current impression signal transacting provides working power.In addition, AC-220V ac input end By zero/fiery switching relay after, can also be that heater, massager etc. provide power power-supply.It can see in the above process Arrive, no matter how input terminal changes the input direction of zero/live wire, and wherein one end is always with DC-12V, DC-5V, single-chip microcomputer etc. Circuit is powered and analog signal reference point is connected, and in other words the reference point of single-chip microcomputer collection signal had both been probably zero line or can It can be live wire.

One kind can detect and eliminate the faradic method of Pediluvium apparatus, and heater shield layer is connected into AC signal coupled capacitor C26 and control machines switch S1；During detection, controllable silicon is not turned on, and screen layer is in suspended state, its induced voltage amplitude It is higher, it is easy to sense power detection circuit progress signal transacting and data acquisition；Single-chip microcomputer is in the front and rear sensing letter of zero/live wire conversion Number collection and after the completion of calculating, relay switching selection is carried out further according to when leading zero/live wire state, and connect connection screen layer with The controllable silicon of zero line, the induced electricity of screen layer is set to be discharged by zero line.

Zero/live wire conversion and control is acted simultaneously using two relays of J1, J2, completes zero/live wire translation function. It can be completed with a dpdt relay, including the heating of foot bath, motor, all power units of bubble, the machine Characteristic is the power switching for including low-voltage circuit and single-chip microcomputer, i.e., powers off fast switch over method entirely.

Full power-off be switched fast method be by scm software control it is lower work, during software initialization, the conversion of zero live wire after The coil of electrical equipment be in be not powered on, non-attracting state.In this condition, software gathers the AC signal in multiple cycles first, so Analysis meter calculation is carried out afterwards, obtains the amplitude data of the exchange fundamental signal under the non-attracting state of relay.Then, software output control Signal processed, make zero/live wire control relay perform adhesive operation, after suitable time-delay, gather the exchange letter in multiple cycles again Number, calculated through analysis, obtain the amplitude data of the exchange fundamental signal under relay attracting state.By to relay adhesive with The induced electricity numerical value gathered under non-adhesive two states is compared, you can it is determined that being suitable for front plug insertion side in next step To correct adjustment state, and control relay enters the state, and now the reference point of DC voltage is connected with zero line.Most Afterwards, software output control signal, the controlled silicon conducting that order control screen layer is connected with reference point, hereafter, the induced electricity of screen layer It will be let out and be discharged by zero line.

Using the non-isolated AC-DC power supplys of above-mentioned mode of operation, as software controls the conversion of zero/live wire, collection sensing The reference point of signal is also converted simultaneously switchs to live wire by zero line, or switchs to zero line by live wire.After upper electricity, software leads to Cross and the induced signal gathered under zero/live wire conversion both front and back state is compared, and then judge which kind of state meets The normal work of zero/live wire needs, and by controlling zero/live wire control relay to lock this kind of working condition, and passes through software control Controllable silicon between turn-on induced signal and locking zero line, makes its induced electricity be discharged at any time by zero line.Need to illustrate , in above-mentioned conversion and test process, including the Pediluvium apparatus such as AC-220V, DC-12V, DC-5V all power supply circuits all The power-off of moment and power up again are experienced, equivalent to being weighed again after the attaching plug of Pediluvium apparatus is pulled Quick-changing direction Newly plug in, and during this period, software will will also keep normal operation always, this energy storage for just needing to increase DC circuit and Interference protection measure.Above control method, which constitutes, is different from other obvious characteristics for eliminating sensing method for electrically.

Brief description of the drawings

Fig. 1 is that Pediluvium apparatus senses electro-detection, zero/live wire change-over circuit figure.

Fig. 1 top is calandria profile, is related to the hierarchy of a variety of difference in functionalitys, and different layers has different fill out Pattern is filled, corresponding every kind of pattern has label character.

Fig. 1 bottom is the electrical schematic diagram of the interlock circuit part involved by the utility model.

Fig. 2 is non-isolated AC-DC power circuit diagrams.

Fig. 3 is Pediluvium apparatus multichannel drive control circuit diagram.

Fig. 4 is that single-chip microcomputer U1 controls zero/live wire conversion portion software flow pattern.

Embodiment

The utility model structure is described further below in conjunction with accompanying drawing.

The utility model is to specifications shown in Fig. 1, according to the product demand of different model, submits the structure chi of calandria The relevant design such as very little, electrical parameter file is produced and processed to customization producer, to each layer insulativity of calandria, heat conduction after arrival Performance, heater power etc. are tested comprehensively, meet to be installed on Pediluvium apparatus after requiring, it is to be ensured that sealing, and by lead It is connected to control unit.The randomness of plug direction during due to socket power, so without zero line, fire during connection calandria power line Line requirement, will lean on control panel voluntarily to judge, as long as keeping the uniformity of product connected mode.

Can detect and eliminate faradic Pediluvium apparatus, including calandria, sensing power detection circuit, zero/live wire change-over circuit, Pediluvium apparatus control circuit and non-isolated AC-DC power supplys.

The calandria is divided into heating element heater and electrode, separation layer, screen layer, isolation from inside to outside as shown in Fig. 1 tops There is the sphenoid to play the role of fastening, anti-dry temperature sensor etc. in layer, shell etc., inside, have different fillings per Rotating fields The mark of pattern.AC signal coupled capacitor C26 is connected directly to from the screen layer terminal extraction wire of above-mentioned calandria and can On the plug terminal for controlling silicon S1, the former completes the test to induced signal, and the latter completes electric discharge, and the two can not work simultaneously.

The sensing power detection circuit includes AC signal impedance conversion attenuation filter circuit as shown in figure 1, being shielded by connection Cover coupling filter capacitor C26, C27 of layer terminal, partial pressure damping resistance R29, R30, R31 composition.Operational amplification circuit is by amplifier U4-1, U4-2, power filter, the electric capacity C29 for completing datum setting function, resistance R31, R32, R33 composition.Single-chip microcomputer is handed over Amplifier U4-2 and U4-1 of the stream signal sample circuit including single-chip microcomputer U1, the A1N0 for being connected to single-chip microcomputer U1 inputs.Finally export AC signal be AD converted into circuit single-chip microcomputer U1 input A1N0.From the AC signal warp of PTC screen layers sensing After AC coupled, and through resistance R29, R30, R31, R32, R33, electric capacity C27, C29 and the decay of integrated circuit U4 compositions, filtering, After impedance conversion, output AC signal, by U1 software collection AC signal, is entered to U1 AD sampling units by spectrum analysis Row computation of Period, the fundamental wave after clutter is rejected, directly exchange collection letter progress data acquisition and subsequent software is handled, Ke Yijian Change hardware circuit, reduce the loss of useful signal, increase the reliability of data.

As shown in figure 1, zero/live wire relay conversion switch circuit include multichannel driving U3 output end DR0 and DR6, relay J1 and J2.Zero/live wire conversion and control by the way of two relay coils of J1, J2 are driven simultaneously, both orders Act simultaneously, complete zero/live wire translation function（It can also be completed with a dpdt relay）.Adding including foot bath Zero live wire of all power units of heat, motor, bubble, and the reference ground of low-voltage power supply circuit, the reference of signal acquisition circuit Point all follows conversion, and the situation of instant cut-off occurs in whole system in transfer process, but SCM program utilizes energy storage still Remain on, so as to complete full power-off fast handover procedures, and the data to powering off both front and back state be acquired with than Compared with.

In Control zero/live wire transfer process, because also there is instant cut-off in the power supply of weak current part The problem of, in order to which guarantee procedure can continue to normal operation, it is necessary to increase the capacity of 12V and 5V dc source filter capacitors, with Just increase energy storage, while also need to close consume energy more LED digital-scroll techniques, indicator lamp, buzzer etc..

Control machines on-off circuit is as shown in figure 1, output end DR0 including multichannel trigger and be connected to DR0 output ends Two-way triggering controllable silicon S1 between screen layer.

When switching on power and carrying out the detection of zero/live wire automatically, software design patterns controllable silicon is not turned on, and screen layer is in outstanding Floating state, its induced voltage amplitude is higher, is easy to sense power detection circuit progress signal transacting and data acquisition.

As shown in Fig. 2 the non-isolated AC-DC power supplys include：Two are formed by diode D1, electric capacity C1 and C2, inductance L1 Level filter circuit, connects the decompression chip U5 of secondary filter circuit output end, inductance L2, diode D2 and D3, electric capacity C3, C4 and C10's is non-every DC12V power supplys, decompression chip U6, the DC-5V power supplys of electric capacity C5 compositions of 12 power output ends of connection, for monolithic The working power and sense signal transacting reference potential of the circuits such as machine, Temperature sampler display, alternating current impression signal transacting.

The non-isolated AC-DC power supplys have DC-12V outputs through DC rectifier and secondary filter circuit D1, C1, C2, L1 Non-isolation DC-DC decompressions, integrated circuit U5 and its peripheral cell L2, D2, D3, C3, C4, C10, DC-12V DC output powers Be available for zero/live wire of driving switching relay coil, heating relay coil etc., the DC-12V power supplys through integrated regulator U6 and After filter capacitor C5 is depressurized to DC-5V again, can be follow-up single-chip microcomputer, display, temperature acquisition sensor, at alternating current impression signal The circuits such as reason provide working power.In addition, AC-220V ac input end by zero/fiery switching relay after, can also be plus Hot device, massager etc. provide power power-supply.It can be seen that, no matter how input terminal changes zero/live wire in the above process Input direction, wherein one end are always powered with circuits such as DC-12V, DC-5V, single-chip microcomputers and analog signal reference point is connected, and changes The reference point that sentence talks about single-chip microcomputer collection signal had both been probably that zero line is also likely to be live wire.AC-220V attaching plugs and DC-12V Dc source, zero/live wire handoff technique and combine non-isolated AC-DC power supplys application, by compare test result determine zero line, Live wire.Pass through the comparison of gathered data before and after being changed to zero/live wire, it can be determined that go out the access order and reality when leading zero/live wire Whether border needs to be consistent, and is further adjusted to correct corresponding states.

As shown in Figure 1,3, including the break-make such as single-chip microcomputer U1, massage, bubble is automatically controlled for Pediluvium apparatus control circuit and display circuit System.Pediluvium apparatus control circuit includes the temperature sensing circuit of single-chip microcomputer U1 and single-chip microcomputer U1 inputs, is connected to single-chip microcomputer U1 outputs The multiplex driver U3 at end, it is connected to the heating controller J3, charactron indicator lamp and buzzer of multiplex driver U3 output ends.Temperature Degree detection circuit includes water temperature temperature sensitive resister Rt1, anti-dry temperature sensitive resister Rt2, divider resistance R11, R12, filter capacitor C21, C20, during carrying out sensing electro-detection and control adjustment, the control function such as calandria, massage needs Close All.Controlling During zero/live wire switching relay switches, in order to which the electric energy storage, LED digital-scroll techniques etc. for maintaining scm software to run needs Close All.

As seen from Figure 3, single-chip microcomputer U1 output ends PD1 passes through the output end DR1 control heating relays J3 after driver U3 Coil, when need heating when, make PD1 export high level, corresponding DR1 output ends will be in the conduction state, J3 relays inhale Close, heater energization work；When needing to stop heating, PD1 is made to export low level, corresponding DR1 output ends will be in cut-off State, as shown in figure 3, relay powers off.Heating relay forbids work during electro-detection is sensed.

From Fig. 1 and Fig. 3, single-chip microcomputer U1 output ends PD5 controls buzzer to send out by the output end DR5 after driver U3 Sound, when needing sounding, PD5 is made to export high level, corresponding DR5 output ends will be in the conduction state, buzzer call；When need When stopping piping, PD5 is made to export low level, corresponding DR5 output ends will be in cut-off state, and buzzer stops piping.

From Fig. 1 and Fig. 3, single-chip microcomputer U1 output ends PD2, PD3, PD4 by the output end DR2 after driver U3, DR3, DR5 control the display of charactron and indicator lamp, PD2, PD3, PD4 export high level in order, then corresponding DR2, DR3, DR4 output ends will be respectively at conducting state, and the common cathode of charactron and indicator lamp will turn on, PD2, PD3, PD4 export low electricity Flat, then corresponding DR2, DR3, DR4 output end will be respectively at off-state, and the common cathode of charactron and indicator lamp will be switched off.

Multiplex driver U3 uses ULN2003A to input Darlington driving chip for 7 tunnels, can provide larger driving electricity Stream, there is protection diode per road, be easy to driving inductive load.

The single chip machine controlling circuit includes SCM peripheral element and embedded software, below in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4 simultaneously combines software zero/live wire of completion detection and zero/live wire transfer process that hardware further explanation passes through single-chip microcomputer U1.

As seen from Figure 1, multiplex driver U3 output end DR6 directly controls two zero/live wire switching relays in parallel J1, J2 coil, when it is 0 that single-chip microcomputer U1, which controls zero/live wire conversion port PD6 outputs, to should drive circuit output end DR6 For open-circuit condition, now two switching relays of J1, J2 are failure to actuate, i.e., L/N ends are connected with the CB1 of J1 relays, N/L ends and J2 The CB2 of relay is connected.Randomness during due to insertion plug, now not can determine that CB1, CB2 end, which is zero line, and which is Live wire by being detected to induced signal, it is necessary to more just can determine that.As single-chip microcomputer U1 control zero/live wire conversion ports PD6 Export for 1 when, to should multiplex driver U3 output ends DR6 be conducting state, now two relays of J1, J2 all inhale by switching Close, i.e., L/N ends are connected with the CK1 of J1 relays, and N/L ends are connected with the CK2 of J2 relays.Compared with former state, from J1, Zero/live wire of J2 relays output is exchanged.After being detected relatively to the induced signal of both the above state, i.e., It is zero line which, which can determine that, which when live wire.

Referring to shown in Fig. 4, software gathers multigroup data complete cycle first, DC component is obtained, as subsequent communication data Zero point value DC0；Then, software design patterns single-chip microcomputer control terminal PD6 outputs are 0, allow zero/live wire control relay to be in non-adhesive State, referred to herein as state 1.；In this case, after of short duration delay, the AC signal in multiple cycles is gathered, deducts base Value, obtains pure alternating component, then carries out analysis calculating, obtains the amplitude data AC1 of exchange fundamental signal；Then, set single Piece machine control terminal PD6 outputs are 1, and zero/live wire control relay is then transferred to attracting state, referred to herein as state 2..In this shape Under state, after of short duration delay, the AC signal in multiple cycles is gathered again, base value is deducted, obtains pure alternating component, then carry out Analysis calculates, and obtains the amplitude data AC2 of exchange fundamental signal.

Amplitude data AC1, AC2 of induced signal are collected respectively under both the above state, by comparing it Compared with if AC1>AC2, represent the state after the control relay adhesive of zero/live wire（I.e. state is 2.）It is correct status, this is latter Directly keep the state constant, and connect discharging thyristor, finally enter the normal operating conditions of the man-machine interaction of follow-up Pediluvium apparatus. If AC1<AC2, then illustrate that 1. state is correct, it is necessary to it is 0 to reset single-chip microcomputer control terminal PD6 outputs, allow zero/fire Line traffic control relay comes back to non-attracting state, keeps the state constant ever since, and connect discharging thyristor.

After completing the detection of zero/live wire, switching, detecting again, you can determine which kind of state for correct zero/live wire work shape State, lock after carrying out after the state, single-chip microcomputer U1 PD0 ends output low level, export output end DR0 corresponding to driver U3 Cut-off, now 12V voltages are added in controllable silicon S1 control terminals by R8 resistance, and make its conducting, and so far screen layer is just connected to On the zero line of civil power.

Claims (9)

1. one kind can detect and eliminate faradic Pediluvium apparatus, including calandria, sensing power detection circuit, zero/live wire conversion electricity Road, Pediluvium apparatus control circuit and non-isolated AC-D/C power, it is characterized in that：The calandria includes PTC heated die plates and metal Screen layer；The sensing power detection circuit includes AC signal impedance conversion attenuation filter circuit, operational amplification circuit, single-chip microcomputer AC signal sample circuit；Zero/live wire change-over circuit include single chip machine controlling circuit, multi-channel driver circuit, zero/live wire after Electrical equipment change-over switch and control machines switch；The input connection metal screen layer of the sensing power detection circuit, described zero/ The input connection single-chip microcomputer AC signal sample circuit of live wire change-over circuit, the output end of zero/live wire change-over circuit connect Connecting to neutral/live wire relay change-over switch and control machines switch.

2. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the AC signal Impedance converts attenuation filter circuit by being connected to electric capacity C26, C27 of screen layer, resistance R29, R30, R31 composition.

3. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the operation amplifier Circuit is by amplifier U4-1 and U4-2, electric capacity C29, resistance R31, R32, R33 composition.

4. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the zero/live wire after Electrical equipment change-over switch includes multiplex driver U3 output end DR0 and DR6, relay J1 and J2.

5. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the controllable silicon touches The control machines switch that hair switch includes multiplex driver U3 output end DR0 and is connected between DR0 output ends and screen layer S1。

6. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the single-chip microcomputer is handed over Stream signal sample circuit includes single-chip microcomputer U1, is connected to single-chip microcomputer U1 inputs A1N0 amplifier U4-2 and U4-1.

7. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the Pediluvium apparatus control Circuit processed includes single-chip microcomputer U1, the temperature sensing circuit of single-chip microcomputer U1 inputs, is connected to the multichannel driving of single-chip microcomputer U1 output ends Device U3, it is connected to the heating controller J3, charactron indicator lamp and buzzer of multiplex driver output end.

8. one kind according to claim 7 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the temperature detection Circuit is included by water temperature temperature sensitive resister Rt1 and anti-dry temperature sensitive resister Rt2, resistance R11, R12, electric capacity C20, C21.

9. one kind according to claim 1 can detect and eliminate faradic Pediluvium apparatus, it is characterized in that the non-isolated AC- D/C power includes：Secondary filter circuit is formed by diode D1, electric capacity C1 and C2, inductance L1, connects secondary filter circuit output End by decompression chip U5, inductance L2, diode D2 and D3, the DC12V power supplys of electric capacity C3, C4 and C10 composition, connect DC12V Decompression chip U6, the DC-5V power supplys of electric capacity C5 compositions of power output end.