CN85204208U

CN85204208U - Photoelectric detecting controller for washing machine

Info

Publication number: CN85204208U
Application number: CN 85204208
Authority: CN
Inventors: 魏佳佳
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-10-11
Filing date: 1985-10-11
Publication date: 1987-02-11

Abstract

The utility model belongs to the technical field of the domestic tool and the domestic article. The utility model is mainly used for controlling the washing process and the drying process of the washing machine. Because a photoelectric detect probe and an electronic control circuit are used, the washing machine not only can automatically spray, wash, and dry, but also can automatically ascertain the time of the part washing according to the change of the washing and the water discharge, which can save the water and the electricity.

Description

Photoelectric detecting controller for washing machine

The utility model belongs to control, regulates this technical field.

Use in washing machine mechanical type of the prior art or electronic type time-controlling arrangement can only rely on artificial adjustment to set washing time, when the clothes amount that is rinsed and dirty clean degree change, often cause the waste of water electricity consumption.

The purpose of this utility model is: make controlled washing machine finish spray irrigation and drying automatically continuously; Automatically detect the situation of change of draining water quality during flushing, and according to the automatic adjustment member washing time of this situation of change.

The utility model is divided into probe and total control circuit two parts.

Probe segment is the situation of change that is used for detecting draining water quality, and its structure is seen Fig. 1.Form by sealing-plug (1), circuit box (2), carriage (4), light emitting diode (5), photodiode (9) and detector tube (8).The required components and parts of probe segment circuit are assembled on the printed substrate (3), and are fixed together with screw and carriage and pack in the circuit box.Photodiode and light emitting diode all are contained on the carriage, and its lead-in wire directly is welded on the printed circuit board (PCB).The circuit board lead-out wire passes sealing-plug and is connected with total control circuit.Detector tube and circuit box closely are connected and fixed with 4 groups of screws, also carriage are fixed simultaneously.The detector tube structure is seen Fig. 3, is the tubular articles of two end openings.Have groove on the outer surface of two end opening a distance, there is the fixed-wing of two symmetries at the pipe middle part, two recessed grooves in pipe is arranged, in order to connect with carriage 4 on the tube wall of its below.Pipe inside in the middle of two grooves is divided into a slit, and stitching two sides is transparent detection window.During work, the detector tube horizontal positioned, the slit part should be positioned at the below.An openend of detector tube links with connecting tube and spray irrigation cylinder delivery port, and another openend and a water draining tee pipe join, and other two ends of this threeway connect washing drum water discharge outlet and drainpipe respectively.When the sewage of flushing clothing flow through from detector tube, the slit in the pipe had guaranteed also not hinder when flow changes normally carrying out of testing.

Total control circuit is contained in one or be divided in several boxes, and this box is made with metal or plastics, and printed substrate is housed in it, is assembled with the used components and parts of circuit on the plate.

The schematic diagram of entire circuit is seen Fig. 5～Figure 10, and wherein Fig. 6 is a circuit block diagram.Among Fig. 6 and Fig. 7 shown in the dotted line is probe segment.

Introduce the circuit working principle by Fig. 6 in conjunction with Fig. 7 below.

During start, power turn-on switch (K2 among Fig. 7) is pressed K1 among hand switch 25(Fig. 7), power connection, simultaneously, bistable 22 is limited by circuit structure, makes phase inverter 23 conductings, J4 among relay 24(Fig. 7) adhesive, power supply is powered because of 24 self-lockings.Behind the power connection, start delayer 12 work, the output low-potential signal makes NAND gate 13 output high potentials, phase inverter 14 conductings, J2 among relay 15(Fig. 7) adhesive, the motor low-speed running; Make NAND gate 16 output high potentials, phase inverter 17 conductings, J1 among relay 18(Fig. 7) adhesive, electromagnetic valve is opened water supply; Spray irrigation begins.At this moment, though 12 low-potential signal makes NAND gate 7 output high potentials, because of monostable 8 being that negative pulse triggers, so 8 are not triggered.

When just beginning to wash, no effluent stream mistake in the detector tube, photistor 2 illumination abundances, its electric current changes through dc amplifier 3 and amplifies, and penetrates even bistable 4 and carries out the amplitude evaluation, exports a high potential signal, and this electric potential signal does not all have influence to NAND gate 7,13,16.After washing some seconds, have that effluent stream after the flushing is managed after testing, the light of light emitting diode 1 is scattered, antireflection part, make 2 weakened by light, voltage after 3 amplifications is lower than 4 threshold voltage, 4 outputs, one electronegative potential,

NAND gate

7,13,16 is influenced by this electronegative potential all, and it is constant to maintain the original state, at this moment, 12 time-delays are arrived, the output high potential, but because of 4 output electronegative potentials, so the influence that not changed by 12 outputs continues flushing.

After flushing is clean substantially, it is sufficient that 2 illumination become, 3 output voltages raise gradually, when it exceeds 4 threshold voltage, 4 upset output high potential signals, this signal makes NAND gate 7 output be transformed into electronegative potential, gets a negative pulse and trigger monostable 8,8 outputs, one low level and give

NAND gate

13 and 16 constant to guarantee keeping former flushing state respectively behind differential.The reason that continues flushing is: though clothing is cleaned substantially, also residual in the clothes fiber have a washing agent, and this moment, photoelectric probe can not detect, so need to use delayer control continuation to wash.Monostable 8,9,10,11 has been formed a sequencing circuit, and each monostable delay time is by the test decision.Each monostable control function is respectively:

A, spray irrigation (motor low-speed running, electromagnetic valve are opened water supply);

B, water spray (motor does not change, and electromagnetic valve is opened water supply);

C, spray irrigation (motor low-speed running, electromagnetic valve are opened water supply);

D, drying (motor runs up, and closed electromagnetic valve does not supply water).

After the monostable delay time of each grade has arrived, trigger next stage automatically when upset, afterbody 11 is exported electronegative potential after hours, trigger bistable 22 through differential, phase inverter 23 is ended, relay 24 outages, open the contact, and power supply disconnects, and control circuit quits work.When 24 outages, warning circuit bistable 26 is triggered in its contact, makes warning circuit 27 work, and audible alarm finishes with the signal flushing, and the operator learns back Push switch 28, makes 26 to restore to the original state, and an overall process of flushing work promptly comes to an end.

In Fig. 7, C1 is an integrating capacitor, produces false triggering when mincing for preventing to be mixed with in the draining and is provided with.R11, C4 form anti-jamming circuit, and electrical signal of reaction that produce disturbs control circuit work to avoid going between long.BG6 and BG7 form monostable circuit, and the length of its time-delay is controlled by R17, and other is monostable by corresponding resistance control.C19, C20 are provided with in order to prevent motor and electromagnet Fraquent start.When probe output uprises current potential by electronegative potential and triggers the first order when monostable, the base potential of BG10, BG13 has a low → height → low variation, after inserting C19, C20, because electric capacity two terminal voltages can not be suddenlyd change, so make this base stage remain electronegative potential, prevent unnecessary potential change in following period of time.R36 influences the relay contact life-span and is provided with for preventing that the C12 discharge current is excessive.Diode in parallel on J1～J4 coil, the reverse impulse that inductance causes when preventing to cut off the power supply damages transistor.

YD is a piezoelectric ceramic piece among Fig. 8, is the microphone device of warning circuit.R94 is a current-limiting resistance, prevents that the voltage that piezoelectric ceramic piece produces when being subjected to extraneous mechanical oscillation and impact from damaging transistor.If extraneous vibration and impact more weak or when not having, can omit need not.

In the control circuit, the control of motor and electromagnetic valve is except can adopting direct drive the in the high-power contact of usefulness relay shown in Figure 5, can also take the relay small-power contact of using shown in Figure 10 to drive thyristor gating circuit, drive the method for motor and electromagnetic valve again by controllable silicon.

Remaining circuit can all adopt discrete component, also can adopt integrated circuit or discrete component and integrated circuit mixed configuration.

The utility model gets up to have following advantage compared with the prior art:

The program mode timing controlled mode of existing washing machine can't be according to what of clothing, dirty clean degree is accurately grasped washing time, and the utility model is owing to adopted photoelectric detection system, can be according to the automatic determining section washing time of the variation of water of flush discharge, so can the reasonable use of water electricity consumption.

The utility model can be finished spray automatically continuously and dash, washes and drying work, improves automaticity.

Because the utility model does not have the adjustment device that potentiometer one class can be worn and torn in use, so long service life.

Because the utility model adopts electronic circuit, just can realize various function with its delay time of change so increase and decrease monostable quantity.

After the utility model is selected the thyristor speed control scheme for use, can use common two-phase alternating current motor.

Another program of the present utility model is as follows: with detector tube stage casing lengthening, and the electrode of two conductions is installed, as Figure 11, shown in Figure 13, is linked up with lead and water level detection circuit, this circuit as shown in figure 12.During spray irrigation, each circuit working state is constant, and when " drying " also do not begin, monostable 11 among Fig. 6 do not overturn, and the P point is an electronegative potential, and no matter whether have water to pass through in the pipe this moment, the equal no pulse output of Q point.After " drying " beginning, the P point is upgraded to high potential, but before this moment, has water to flow through in the detector tube always, and T, N point to point are equivalent to connect a resistance, so the BG31 conducting, output is low-potential state, the still no pulse output of Q point.After clothing was dried, current were reduced to anhydrous contact between T, N, so BGBG31 ends, exported high potential, and NAND gate is exported by high step-down, and the bistable 22 by among Q point output negative pulse triggering Fig. 6 makes power cut-off and warning, finishes drying work automatically.After adopting this programme, can determine used time of " drying " process, rational utilization of electricity automatically according to result to the automatic detection of discharge level.Two electrodes that water level detecting is used can be identical, also can be different, and they and detector tube can adopt bolt arrangement to fix, and also electrode can be fixed on attached helping on the object, this object are fixed on the detector tube again.

In two schemes, detector tube can be an independently individuality, also can be integral with spray irrigation cylinder cylinder body, and can do the detector tube body grooving shape this moment.

Description of drawings:

Fig. 1 probe segment structure chart

(1) sealing-plug (2) circuit box (3) printed circuit board (PCB)

(4) carriage (5) light emitting diode (6), (7) screw, nut

(8) detector tube (9) photodiode (10), (11) screw, nut

Fig. 2 circuit box three-view diagram

Fig. 3 detector tube three-view diagram

Fig. 4 carriage three-view diagram

Fig. 5 is motor wiring schematic diagram L 1. _RInductance coil for serial connection

L is the motor winding

2. electromagnetic valve wiring schematic diagram

3. power supply wiring schematic diagram

Fig. 6 electricity theory diagram

(1) light emitting diode (2) photodiode (3) dc amplifier

(4) penetrate even bistable circuit (5) voltage-stabilized power supply (6) anti-jamming circuit

(7) NAND gate circuit (8), (9), (10), (11) monostable circuit

(12) start-up circuit (13) NAND gate circuit (14) phase inverter

(15) relay (16) NAND gate circuit (17) phase inverter

(18) relay (19) NAND gate circuit (20) phase inverter

(21) relay (22) bistable circuit (23) phase inverter

(24) relay (25) manually boots switch (26) bistable circuit

(27) warning circuit (28) manually recovers switch

Fig. 7 control circuit figure

R2, R11, R17, R25, R38, R47, R55 need test definite among the figure.

BG1, BG2, BG3, BG5, BG10, BG12, BG13, BG19, BG21, BG22---be BV _CEO, 〉=25V, I _CmThe NPN type silicon crystal triode of 〉=20mA, β=50～～60.

BG6, BG7, BG8, BG9, BG15, BG16, BG17, BG18---used transistor is the same, but β=100.

BG4, BG11, BG14, BG20, BG23---be BV _CEO〉=25V, I _DmThe NPN type silicon crystal triode of 〉=500mA, β=80～90.

D3---burning voltage is the silicon voltage regulator diode of 11.5V～12.5V.

The last diode connected in parallel of J1～J4 is V _RM〉=80V, I _OMThe silicon diode of 〉=100mA.

D ₁---light emitting diode.

D ₂---photodiode.

All the other diodes are V _RM〉=30V, I _OMThe silicon diode of 〉=50mA.

J1～J3 is a relay, rated voltage 15V, operating current＜100mA.

Fig. 8 warning circuit

YD is a piezoelectric ceramic piece, and C21 is definite through testing.

Fig. 9 voltage-stabilized power supply circuit

W ₁Be " W7815 " integrated regulator;

W ₂Be " W79L06 " integrated regulator.

Figure 10 thyristor speed control circuit and reverse-blocking tetrode thyristor circuit

(1) bidirectional triode thyristor (2) diac

(3) motor winding (4) electromagnetic valve coil

R94 needs through the test decision.

The detector tube three-view diagram of Figure 11 band condensate tank of dehumidifier

Figure 12 water level detection circuit

Figure 13 water level detecting electrode scheme of installation

(1) detector tube (2) nut

(3) electrode (4) nut

(5) weld tabs (6) caulking gum pad

Claims

1, a kind of Photoelectric Detection electronic-controlled installation that shower-washer is controlled automatically, it is by using detector tube, the circuit box carriage, the Photoelectric Detection probe that electronic circuit is formed and by more than one anti-jamming circuit, NAND gate circuit, monostable circuit or other delay circuit, water level detection circuit, start-up circuit, phase inverter, relay, bistable circuit, warning circuit, voltage-stabilized power supply, the thyristor speed control circuit, the total control circuit that switch is formed is formed, and is primarily characterized in that: the control motor in the total control circuit or the first order monostable circuit of electromagnetic valve or other delay circuit can be by Photoelectric Detection probe control triggering work.

2, install according to claim 1, it is characterized in that:

A. in the detector tube slype is arranged;

B. detector tube is made by transparent material.

3, install according to claim 1, it is characterized in that:

A. in the detector tube slype is arranged, " window " that transparent material is made is equipped with in all or local area of passage two sides;

B. detector tube is made by opaque material.

4, install according to claim 1, it is characterized in that: the detector tube middle part is equipped with the electrode that the pair of conductive material is made, and the part of electrode in detector tube can contact with current.

5, as device as described in the claim 4, it is characterized in that: can be installed in two electrodes on the helpers earlier, again this helpers is fixed on the detector tube.

6, install according to claim 1, it is characterized in that detector tube can be an independent individual, also can be integral with the cylinder body of spray irrigation cylinder.