CN2633198Y

CN2633198Y - Water supply and draining control system for electronic controlled household washing device

Info

Publication number: CN2633198Y
Application number: CN 03268251
Authority: CN
Inventors: 区长钊
Original assignee: Jinling Electrical Co Ltd
Current assignee: Jinling Electrical Co Ltd
Priority date: 2003-08-04
Filing date: 2003-08-04
Publication date: 2004-08-18
Anticipated expiration: 2013-08-04

Abstract

A water supply and draining control system for the electronically controlled household washing device comprises a water supply actuator, a drainage actuator and a bidirectional thyristor circuit used to drive the two actuators, wherein, the water supply actuator and the drainage actuator are DC electromagnetic elements; The main return route of the bidirectional thyristor circuit, the water supply actuator and the drainage actuator which are connected in series are connected to a power supply; Half of the conductor diode taking a certain direction of the series connection as the breakthrough direction is parallel with the water supply actuator; The other half of the conductor diode taking a certain direction of the series connection as the deadline direction is parallel with the drainage actuator. Microelectronic circuit receives the output of a detecting circuit of the power supply and feedbacks output related to the polarity of the power supply toward the triggering pole of the bidirection thyristor. The circuit sets the drainage actuator in action by triggering the bidirectional thyristor circuit to conduct in a polarity of the power supply and sets the suction- actuator in action in another polarity of the power supply. Compared with the prior art, the water supply and draining control system controls two actuators with one bidirectional thyristor circuit, which can save one bidirectional thyristor and the control and protection circuits.

Description

A kind of electronically controlled family expenses scrubber advance drainage control system

Technical field

The utility model relates to a kind of drainage control system that advances of electronically controlled family expenses scrubber, the domestic electric washer of especially a kind of bidirectional thyristor control or dish-washing machine advance drainage control system.

Background technology

In the traditional electronically controlled domestic electric washer or dish-washing machine, comprise: a water container that is used to wash, execution provides the water inlet actuator of slurry to this water container, carry out draining actuator of discharging slurry and the bidirectional thyristor circuit that drives them, and other mechanical electric systems.Its typical control circuit as shown in Figure 1, each implements alternating-current switch control by a two-way IGCT electromagnet of entering water electromagnetic valve and traction draining valve; Entering water electromagnetic valve and electromagnet are communication elements, or the direct current component of preposition rectification circuit.This control circuit is continued to use in industrial equipment, is used for cheap home appliances and should simplifies to reduce cost.

The utility model content

Technical problem to be solved in the utility model is: a kind of drainage control system that advances is provided, and it is in conjunction with the characteristics of family expenses scrubbers such as domestic electric washer or dish-washing machine, and simplified control circuit is to reduce cost.

The technical solution of the utility model is a kind of drainage control system that advances of electronically controlled family expenses scrubber, comprising: water inlet actuator, draining actuator and their bidirectional thyristor circuit of driving; It is characterized in that:

---described water inlet actuator and draining actuator are the direct solenoid element;

---described bidirectional thyristor circuit comprises the major loop and the trigger electrode control circuit thereof of a two-way IGCT;

---described major loop and water inlet actuator and the past power supply of draining actuator series connection, the semiconductor diode is that conducting direction is parallel to into water actuator with described series connection direction, and another semiconductor diode is parallel to the draining actuator with this series connection direction for ending direction;

---described control circuit comprises the power sense circuit that is connected in power supply; Receive its output, present the microelectronic circuit of relevant output to described trigger electrode with electric power polarity.

The hardware of the ingenious adjustment traditional circuit of this circuit and combination have been excavated the intrinsic rectification performance relevant with electric power polarity of bidirectional thyristor with software, realize required control:

---when the conducting direction of electric power polarity and the semiconductor diode of draining actuator parallel connection was identical, this diode made draining actuator short circuit; Trigger the bidirectional thyristor conducting this moment, and the halfwave rectifier voltage of this polarity is applied on the water actuator, water inlet actuator action and the draining actuator is failure to actuate;

---when another electric power polarity, then be that the semiconductor diode conducting of into water actuator parallel connection makes its short circuit; Trigger the bidirectional thyristor conducting this moment, and the halfwave rectifier voltage of this polarity is applied on the draining actuator, draining actuator action and the water inlet actuator is failure to actuate;

---if bidirectional thyristor all is subjected to triggering and conducting at all electric power polarities, then intake actuator and draining actuator obtain halfwave rectifier voltage in the respective electrical source polarity respectively, thereby action simultaneously;

---if bidirectional thyristor all is not subjected to triggering and conducting at all electric power polarities, then intake actuator and draining actuator all do not obtain halfwave rectifier voltage and are failure to actuate.

The effect that each actuator diode connected in parallel has the inductance afterflow concurrently and the bidirectional thyristor zero passage is opened circuit, actuator thereby obtain level and smooth electric current and control reliably.

Like this, use a bidirectional thyristor just to reach control, saved a bidirectional thyristor and control and holding circuit than traditional circuit to two actuators; Change the water inlet actuator and the draining actuator of direct current component into, can avoid the eddy-current loss and the noise of communication elements,, thereby reduce the cost and improve reliability again owing to need not preposition rectification circuit.

Described relevant output being designed to substantially in microelectronic circuit with electric power polarity:

---when utensil is carried out water inlet technology, when the conducting direction of electric power polarity and the semiconductor diode of draining actuator parallel connection is identical, trigger output voltage; Perhaps

---when utensil is carried out drainage technology, when the conducting direction of electric power polarity and the semiconductor diode of the actuator parallel connection of intaking is identical, trigger output voltage; Perhaps

---when utensil is carried out water inlet simultaneously and drainage technology, at the equal trigger output voltage of all electric power polarities; Perhaps

---when utensil stops all water inlets and drainage technology, stop trigger output voltage.The arts demand of family expenses scrubbers such as conventional domestic electric washer or dish-washing machine has been satisfied in this design.

It further designs and is described trigger voltage:

---when water inlet actuator or the startup of draining actuator, be the trigger voltage of no phase shift time-delay;

---after startup is finished, be the trigger voltage of regulation phase shift time-delay.This design in conjunction with software, is excavated the intrinsic pressure regulating performance of bidirectional thyristor dexterously, and to use the direct solenoid element of simplex winding, the higher rated voltage of input when starting is to produce enough suction; After startup, be reduced to lower maintenance voltage, to lower loss; Exempt the labyrinth of the electromagnetic for direct drainage of traditional double winding tape starting switch, obviously reduce the cost and improve reliability.

Description of drawings

The following drawings is used to illustrate embodiment of the present utility model:

Fig. 1 is the circuit diagram of a kind of washing machine of prior art;

Fig. 2 is for using the circuit diagram of a kind of washing machine of the present utility model;

Fig. 3 is the circuit diagram of the power supply detecting unit among Fig. 2;

Fig. 4 is the control flow chart of the utility model embodiment;

The specific embodiment

Traditional family expenses scrubber, a kind of basic comprising of washing machine comprises: motor and transmission mechanism thereof are located at the bottom of steel ladle, transmission of power to impeller and the washing tube dehydration barrel of holding concurrently; Magnetic valve supplies water in washing tube is held concurrently dehydration barrel; Draining valve is controlled by electromagnetic for direct drainage, the discharges such as washings in the washing and dewatering bucket.

Its circuit is as shown in Figure 1: in washing machine, the single chip machine controlling circuit 2 of supply voltage on the binding post 1 of input external electrical network power supply in the computer plate drives

bidirectional thyristor

31,32,33 and 34, control the electromagnetic for direct drainage 43 of the double winding tape starting switch of motor 41, magnetic valve 42 and preposition bridge rectifier respectively, action such as the gearing system washs, rinsing and dehydration; Hardware and software in the single chip machine controlling circuit 2 generally includes:

---routine processes unit 22;

---driver element 23, receive the output of routine processes unit 22, to the trigger electrode output signal of bidirectional thyristor, control its break-make;

---power supply detecting unit 21, provide zero cross signal to routine processes unit 22, bidirectional thyristor is opened in the alternating voltage zero-crossing point, impact and interference to reduce.

The above is typical case's formation of prior art microcomputerized control full automatic impeller formula washing machine, can certainly be agitator type washing machine or tumbling-box washing machine.Wherein,

bidirectional thyristor

33 and 34, magnetic valve 42, electromagnetic for direct drainage 43 and single chip machine controlling circuit 2 are formed the drainage control system that advances of this washing machine.The utility model embodiment improves to form on the basis of this system.

The circuit that uses washing machine of the present utility model as shown in Figure 2, it advances drainage control system contrast prior art as shown in Figure 1, does following the improvement:

---

bidirectional thyristor

33 and 34 is replaced by bidirectional thyristor 33 ', its major loop be access to binding post 1 after magnetic valve 42 ' and electromagnetic for direct drainage 43 ' are connected successively; Diode D1 is parallel to magnetic valve 42 ', and D2 is parallel to electromagnetic for direct drainage 43 ', and the anode of D1, D2 all is connected the common port of magnetic valve 42 ' and electromagnetic for direct drainage 43 ' series connection; Because water inlet and draining majority do not carry out simultaneously,, select its capacitance grade identical enough with bidirectional thyristor 34 though bidirectional thyristor 33 ' replaces two bidirectional thyristors; It has bigger allowance with respect to bidirectional thyristor 33, thereby safer.

---the circuit of power supply detecting unit 21 ' is as shown in Figure 3.This circuit changes common zero passage detection full-wave rectification sampling into the halfwave rectifier sampling; It comprises that transformer TR, diode D3, resistance R 1-R4, capacitor C 1 and C2, NPN type triode BG1,5V dc source and single-chip microprocessor MCU (select model for use: relevant portion 87C1202); The AC power that transformer TR provides binding post 1 is depressured to about 10V, is shaped as a prescription wave pulse signal through D3 halfwave rectifier and triode BG1 circuit, delivers to an I/O mouth of single-chip microprocessor MCU; Setting program is constantly read I/O mouth state, and it becomes 1 or become for a moment of 0 by 1 by 0, is judged as zero-crossing of alternating current; Become 1 beginning by 0 and extremely become for a period of time of 0 by 1, the I/O mouth is 1, is judged as the positive polarity interval of alternating current; Become 0 beginning by 1 and extremely become for a period of time of 1 by 0, the I/O mouth is 0, is judged as the negative polarity interval of alternating current.Therefore, this circuit also provides the electric power polarity signal when zero cross signal is provided.This circuit is lower than full-wave rectification sampling cost, and signal is more clear reliable.In addition, the transformer reduction voltage circuit also can change lower resistance of cost or capacitance partial pressure circuit into;

---magnetic valve 42 ' is selected direct current component for use; Traditional magnetic valve 42 is a communication elements, and the magnetic circuit part is improved a little can become alternating current-direct current dual-purpose magnetic valve, just can be used for present embodiment;

---electromagnetic for direct drainage 43 ' is selected the simplex winding element for use, and maintenance winding and starting switch that traditional electromagnetic for direct drainage 43 is removed in the double winding just can be used for present embodiment;

---routine processes unit 22 ' increases control program as shown in Figure 4, reaches at washing machine to implement following control:

---when washing machine was carried out water inlet technology, power sense circuit detected power supply and is in the positive polarity interval, and driver element 23 ' makes it conducting and drives magnetic valve 42 ' action to the trigger electrode trigger output voltage of bidirectional thyristor 33 '; And when this trigger voltage starts at magnetic valve 42 ', be the trigger voltage of no phase shift time-delay; After startup is finished, be the trigger voltage of regulation phase shift time-delay.

---when washing machine was carried out drainage technology, power sense circuit detected power supply and is in the negative polarity interval, and driver element 23 ' makes it conducting and drives electromagnetic for direct drainage 43 ' action to the trigger electrode trigger output voltage of bidirectional thyristor 33 '; And when this trigger voltage starts at electromagnetic for direct drainage 43 ', be the trigger voltage of no phase shift time-delay; After startup is finished, be the trigger voltage of regulation phase shift time-delay.

---when washing machine is carried out water inlet simultaneously and drainage technology, power sense circuit detects power supply and is in the interval and negative polarity interval of positive polarity, driver element 23 ' makes it conducting and drives magnetic valve 42 ' and electromagnetic for direct drainage 43 ' action simultaneously all to the trigger electrode trigger output voltage of bidirectional thyristor 33 '; And this trigger voltage is at them ' when starting, be the trigger voltage of no phase shift time-delay; After startup is finished, be the trigger voltage of regulation phase shift time-delay.

---when washing machine stopped all water inlets and drainage technology, driver element 23 ' stopped trigger output voltage, and bidirectional thyristor 33 ' turn-offs, and magnetic valve 42 ' and electromagnetic for direct drainage 43 ' stop action.

To the experiment that present embodiment carries out, shown the utility model control system expected effect.

Described water inlet actuator of technical solutions of the utility model and draining actuator except that the solenoid actuated element of above introduction, also can be the dc motor driving elements.

Claims

1, a kind of electronically controlled family expenses scrubber advance drainage control system, comprising: water inlet actuator, draining actuator and drive their bidirectional thyristor circuit; It is characterized in that:

---described control circuit comprises the electric power polarity testing circuit that is connected in power supply; Receive its output, present the microelectronic circuit of relevant output to described trigger electrode with electric power polarity.

2, according to the drainage control system that advances of the described family expenses scrubber of claim 1, it is characterized in that described be output as relevant with electric power polarity:

---when utensil stops all water inlets and drainage technology, stop trigger output voltage.

3, according to the drainage control system that advances of the described family expenses scrubber of claim 2, it is characterized in that described trigger voltage:

---after startup is finished, be the trigger voltage of regulation phase shift time-delay.