JPH02309996A - Regulating and detecting circuit and method of feed motor for cleansing powder - Google Patents

Abstract

PURPOSE: To prevent the damage of a motor by detecting the restriction of the motor when the riving of the motor for charging powder detergent is restricted owing to the aggregation of the powder detergent and stopping the driving of the motor. CONSTITUTION: When an AC power AC is impressed on the powder detergent charging motor 3 at the time of charging the powder detergent 1A, the high potential period T1 and low potential period T2 of a detection signal to be inputted to the input terminal of a microcomputer are counted. When the high potential and low potential signals being more than the times T1 and T2 are inputted, the restriction of the driving of the powder detergent charging motor 3 is discriminated. Then the drives of the motor 3 and a powder detergent charging solenoid 66 are stopped, then that is displayed, alarmed and reported to a user. Thus, the damage of the power detergent charging motor 3 and the occurrence of fire are prevented.

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides a washing machine equipped with a powder detergent dispenser that automatically dispenses powder detergent according to the control of a washing machine.
The present invention relates to a restraint detection circuit and detection method for a powder detergent dispensing motor that detects whether a powder detergent stage-person motor for dispensing powder detergent is normally driven and controls the drive thereof.

[Prior art and its problems]

As an example of the prior art, Korean Utility Model Publications No. 88-12287 and No. 88-17993 are known as powder detergent dispensers that are installed in a washing machine and dispense powder detergent. Among these, Korean Public Utility Model Publication No. 88-1228
No. 7 is a dust related to a washing machine detergent supply device in which a screw conveyor rotated by a motor is installed at the bottom of a detergent container, and the detergent in the detergent container is directly fed into the washing tub through an installed supply pipe, and is disclosed in the Korean Public Utility Model Publication. Tube 88-1
No. 7993 relates to an automatic powder detergent dispensing device for a home electric washing machine, which is configured to automatically dispense a desired amount of powder detergent into a hopper by rotating a screw using a small gear type motor. However, in the examples cited above, there is no device that can prevent the powder detergent from coagulating due to surrounding humidity or being left for a long time, so the rotation of the motor and screw when adding detergent is not available. As a result, the amount of detergent discharged is not uniform, making it impossible to accurately dispense the desired amount of detergent, and causing strain on the equipment. . A cited example of conventional technology for solving the problems mentioned above is Japanese Publication Utility Model Publication No. 6.
No. 3-68984. The technology related to this utility model includes: a detergent storage section that accommodates and stores powdered detergent; a detergent discharge member that discharges the powdered detergent in the detergent storage section into a detergent receiving section that is a passage through which washing water is supplied;
It is composed of a power generating section for driving the detergent discharging member, and a stirring member that operates simultaneously with the detergent discharging member and stirs the powdered detergent on the side wall surface portion of the detergent storage section.
The agitation member, which is activated as the detergent discharge member rotates, breaks up the powdered detergent in clumps and uniformly discharges it. However, in such conventional powder detergent dispensing devices, if there is moisture in the surrounding area or if moisture flows into the detergent storage section when washing water is supplied, the powder at the outlet side of the detergent storage section will be removed. If the detergent solidifies and is left for a long time, the powder detergent will stick firmly to the screw on the inner surface of the detergent reservoir, causing the screw to stop rotating even when the powder detergent injection motor is being driven. occurs. In other words, in the past, when it was time to add powdered detergent, AC power was applied to the powdered detergent injection motor for a certain period of time by control of the microphone, regardless of the driving state of the powdered detergent injection motor. Even if the powder detergent on the discharge port side solidifies, the rotation of the screw and motor output gear is stopped, and the drive of the powder detergent injection motor is restricted, when the powder detergent injection time comes, the powder detergent injection There are problems in that the motor for dispensing powdered detergent is damaged by applying AC power to the motor, and in extreme cases, a fire may occur.

[Purpose of the invention]

The present invention has been made to solve the above problems, so that when AC power is applied to the powder detergent injection motor,
Detects whether the powder detergent injection motor is operating normally,
A restraint detection circuit and detection circuit for a powder detergent dispenser motor that prevents damage to the powder detergent dispenser motor and the occurrence of a fire by cutting off the AC power and displaying this information if the powder detergent dispenser motor is restrained. The purpose is to provide a method.

[Means for Solving the Problems] The restraint detection circuit of the powder detergent dispensing motor of the present invention includes a permanent magnet that is installed in and rotates a gear that is shaft-mounted on the powder detergent dispensing motor, and a permanent magnet that is rotated at a position adjacent to the gear. It is equipped with a reed switch that is connected as the magnetic force of the permanent magnet is applied, and a detection section that detects the state of the switch and inputs the drive state of the motor for dispensing powder detergent to the microcomputer, and a detection section that is connected as the magnetic force of the permanent magnet is applied. A microcomputer that counts pulse signals and stops driving the powder detergent dispensing motor and solenoid when the motor drive is restricted, and a powder detergent dispensing motor drive that drives the powder detergent dispensing motor and solenoid according to microcomputer control. The controller is composed of a solenoid drive unit for injecting powder detergent, a display unit that displays when the motor drive is restricted according to the control of a microcomputer, and an alarm output unit that outputs an alarm sound. Furthermore, the method for detecting the restraint of the powder detergent injection motor of the present invention drives the powder detergent injection motor and the powder 6L injection solenoid, and when the powder detergent is introduced for a certain period of time, the powder 6L is removed. The step of counting the high potential period and the low potential period of the pulse signal that detects the driving state of the motor, and determining whether the high potential period or the low potential period of the counted pulse signal is longer than a certain reference period. , the step of determining whether the motor is driven normally, and the powder dispensing time until the detergent injection time has elapsed if the high potential period or low potential period of the pulse signal coincides with the constant Q period. A stage in which the detergent injection motor and solenoid are continuously driven, and when the high potential period or low potential period of the pulse signal is longer than a certain reference period, the driving of the powder detergent injection motor and solenoid is stopped and this is displayed. It consists of steps such as issuing an alarm at the same time.

【Example】

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the restraint detection circuit and detection method for a motor for dispensing powdered detergent according to the present invention having the above-described purpose and structure will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a powder detergent dispenser that is installed in a washing machine and dispenses powder detergent. As shown in the figure, a screw 2 is installed at the lower part of the inner side of a detergent tank l in which the powdered detergent IA is built-in, and a discharge port 1B from which the powdered detergent IA is discharged is formed on one side of the screw L-2. , a gear 2A is installed at the other end of the screw 2, and the gear 2A is a gear 3A that is shaft-mounted on the powder detergent injection motor 3.
The screw 2 is rotated according to the drive of the powder detergent injection motor 3, and the powder detergent IA is delivered to the discharge port IB.
A gear 4 is installed at the top of the screw 2, and as the gear 4 rotates as the screw 2 rotates, it crushes the lumped powder detergent 1A so that the powder detergent 1A is uniformly discharged. It has become. Further, a cap 5 is installed in the discharge part IB, and the cap 5 is connected to an operating rod 6A of a powder detergent injection solenoid 6, and when the powder detergent injection solenoid 6 is driven, the operating rod 6A is moved. Cap 5 is outlet IB
is opened and the powder washing installation solenoid 6 is not driven, the cap 5 is configured to close the discharge port by the elastic force of the spring 6B. In the powder detergent injection device configured in this way, when the powder 6 cutting solenoid 6 and the powder detergent injection motor 3 are driven, the actuating rod 6A retreats according to the drive of the powder detergent injection solenoid 6 and the cap is removed. 5 opens the discharge port IB, the gears 3A and 2A are rotated according to the drive of the powder detergent injection motor 3, and the screw 2 is rotated, so that the powder detergent 1Δ stored in the detergent tank 1 is removed. is discharged to the discharge port IB as the screw 2 rotates, and enters the washing machine's washing tub.At this time, as the screw 2 rotates, the gear 4 is rotated to remove the lumped powder detergent IA. This will crush the detergent powder and allow it to be discharged evenly. The powder detergent dispensing motor 3 of such a powder detergent dispensing device
As shown in FIG. 2, the present invention installs a permanent magnet 3B on one side of a gear 3A that is shaft-mounted on the powder detergent injection motor 3, and A reed switch IO connected by the magnetic force of the permanent magnet 3B is installed at the position of the motor 3 for dispensing powder detergent.
As gear 3A rotates due to the drive of When located within region B, reed switch 10 is opened. Briefly, FIG. 3 is a restraint detection circuit diagram of the powder detergent dispensing motor of the present invention. In order to detect the state of 10 and input it to the microcomputer 11, it is composed of resistors R1-R3, transistors TR, diode D, and capacitor C2. A detection unit 12 that inputs the pulse signal generated by the switching operation to the microcomputer 11; and an inverter that drives the powder detergent injection motor 3 under the control of the microcomputer 11.
1. A powder detergent injection motor drive unit 13 composed of a resistor R4 and a triac TR1, an inverter (2) that drives the powder detergent injection solenoid 6 under the control of the microcomputer 11, a resistor R6, and a triac TR.
A solenoid drive unit 14 for powder detergent injection, which is configured by I, and an inverter I3 and a buzzer BZ that output an alarm sound when the drive of the powder detergent injection motor is restricted according to the control of the microcomputer 11. The washing machine comprises an alarm output unit 15, a display unit 16 that displays the operating status of the washing machine, and a power supply and peripheral circuit unit 17 that supplies operating power B+ and controls various operations. Note that the symbol AC in the figure is an alternating current power source. In the present invention made as described above, in a state where AC @ source AC is applied and the power supply and peripheral circuit section 17 supplies the operating power B+, it is time to add the powder detergent IA, and the microcomputer 1
1 outputs a high potential signal through the output terminals PB and PC, it is inverted by the inverter 11, and a low potential signal is applied to the gates of the triacs TR1, TRI. , is conductive,
An alternating current power supply AC is applied to the powder detergent injection motor 3 and the powder detergent injection solenoid 6. At this time, powder detergent IA
When the powder detergent injection motor 3 is driven normally without being solidified, the gear 3A rotates, the gear 2A and the screw 2 rotate, and the powder detergent injection solenoid 6 rotates.
is driven, and the cap 5 opens the outlet IB, so that the powdered detergent IA in the detergent tank 1 flows through the outlet IB.
It is discharged to B and enters the washing tub. Further, as the gear 3A rotates, the reed switch 10 repeatedly connects and opens, and the transistor TR of the detecting section 12 repeatedly turns on and off.
2 outputs a pulse signal as shown in FIG. 4(A), and the output pulse signal is input to the input terminal IN of the microcomputer 11. It is determined whether the powder detergent injection motor 3 is driven normally while counting the potential period T and the low potential period T. If the powder detergent injection motor 3 is driven normally, the powder detergent injection motor 3 continues for the detergent injection time. 3 and the powder detergent injection solenoid 6 are driven to dispense a certain amount of detergent into the washing tub. Furthermore, even if the alternating current power supply AC is applied to the powder detergent injection motor 3 in the above case, the powder detergent LA at the outlet IB is solidified and the screw 2 cannot be rotated, and the gears 2A and 3A cannot be rotated. If the drive of the motor 3 is restricted, the reed switch IO will remain connected or open depending on the rotation stop state of the gear 3A. That is, permanent magnet 3B of gear 3A
is located within area A, reed switch 10
are connected, so the transistors TR,
is turned on, and a low potential signal is input to the input terminal IN of the microcomputer 11 as shown in (c) of FIG.
When the permanent magnet 3B of the gear 3A is located within the region B, the reed switch 10 is opened and the transistor TR5 of the detection section 12 is turned off, so that the input terminal IN of the microcomputer 11 is connected to the input terminal IN of FIG. As shown in FIG. 1, a high potential signal is manually input, and the microcomputer 11 determines that the drive of the powder detergent injection motor 3 is restricted. Therefore, the microcomputer 11 outputs a low potential signal through the output terminals PB and PC, cuts off the AC power supply AC from being applied to the powder detergent injection motor 3 and the powder detergent injection solenoid 6, and drives the buzzer BZ. , this is displayed on the display section 16 to notify the user. On the other hand, FIG. 5 is a signal flow diagram showing the control method of the present invention. According to the present invention, when it is time to add the powdered detergent IA, the output terminals PB and P of the microcomputer 11 are activated in step 100.
Through C, a high potential signal is outputted to the powder detergent injection motor 3 and the powder detergent injection solenoid 6 to drive the AC cylinder [jAC], and then the step lot
In step 102, it is determined whether a predetermined powder detergent injection time has elapsed, and if the predetermined powder detergent injection time has not elapsed, the powder detergent injection time counter is counted up in step 102, and in step 103, the input terminal of the microcomputer 11 is incremented. Determine whether a high potential signal is input to IN. At this time, if a high potential signal is input to the input terminal IN of the microcomputer 11, in step 104, as shown in FIG. , and for a certain period of time T. If no high potential signal is input, the stage l.
In step 05, the TI counter is counted up, and in step 106, the T counter is cleared, and the process is repeated from step 106. Meanwhile, at step 103, the input terminal IN of the microcomputer 11
If a low potential signal is applied manually, in step 107, the fourth
As shown in FIG. After counting up T and clearing the counter in step 109, the process is repeated from step lot. Furthermore, if a high potential signal is input for a certain period of time T1 or longer in step 104, or if a high potential signal is manually input for a certain period of time T1 or more in step 107, the microcomputer 11 will solidify the powdered detergent lΔ and use it to dispense the powdered detergent. It is determined that the drive of the motor 3 is restrained, and in step 110, a low potential signal is outputted through the output terminals PB and PC, and the AC 74 source AC is applied to the powder detergent injection motor 3 and the powder detergent injection solenoid 6. After shutting off, at step +11, the display unit 16 displays that one powdered detergent has been coagulated, and the buzzer BZ is activated to inform the user.
In step 112, the process continues until the power is turned off. Furthermore, in the above, T, counter and T. The time counted by the counter continues for a certain period of time T.
If a certain amount of powder detergent injection time has elapsed without exceeding T, then in step 113 T, the counter and T
, the counter is cleared, and in step 114 the output terminal PB of the microcomputer 11 is cleared. After outputting a low potential signal through the PC and stopping the driving of the powder detergent injection motor 3 and the powder detergent injection solenoid 6, the next routine is executed. That is, when it is time to add the powdered detergent LA and the AC power supply AC is applied to the powdered detergent injection motor 3, the high potential period T of the detection signal inputted to the input terminal IN of the microcomputer 11, and Counting the low potential period T, and determining that the drive of the powder detergent injection motor 3 is restrained when high and low potential signals for the period T, T, or more are manually input, The driving of the powder detergent injection motor 3 and the powder detergent injection solenoid 6 is stopped, and this is displayed and an alarm is issued to notify the user.

【Effect of the invention】

As explained in detail above, the present invention detects the presence of powder 6 when the powder detergent is solidified and the drive of the powder detergent injection motor is restrained, and stops the drive of the motor for cutting the powder 6. This not only prevents damage to the powder detergent dispenser motor and prevents fires, but also allows the user to quickly determine whether the powder detergent has solidified and clean the detergent tank before using the washing machine again. You can get the effect of

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a powder detergent charging device of a washing machine, FIG. 2 is a front view showing gears of a powder detergent charging motor based on the restraint detection circuit of the present invention, and FIG. FIG. 4 is a drive control circuit diagram of the present invention. FIG. 1 is a signal flow diagram showing a method for detecting restraint of a motor for dispensing powdered detergent. 3 ・Motor for adding powdered detergent, 3A...Gear, 3B...
Permanent magnet, 6... Solenoid for powder detergent injection, 10 - Reed switch, 11... Microcomputer, 12
・Detection section, 15. Alarm output section, 16. Display section.

Claims (1)

[Scope of Claims] 1. In a washing machine that dispenses powdered detergent into a washing tub in which a powdered detergent dispensing motor and a powdered detergent dispensing solenoid are driven under the control of a microcomputer, a It is equipped with a permanent magnet that is installed on the gear and rotates, and a reed switch that is connected when the magnetic force of the permanent magnet is applied at a position adjacent to the gear. A detection unit that inputs the driving state of the dosing motor, a microcomputer that counts pulse signals from the detection unit and stops driving the powder detergent dosing motor and solenoid when the powder detergent dosing motor is restricted. , a locking of the motor for dispensing powdered detergent, characterized in that it is comprised of a display unit that displays this and an alarm output unit that outputs an alarm sound when the drive of the motor for dispensing powdered detergent is restrained according to the control of a microcomputer. detection circuit. 2. When the powder detergent injection time comes, the powder detergent injection motor and the powder detergent injection solenoid are driven for a certain powder detergent injection period to add powder detergent to the washing tub. The step of counting the high-potential period and low-potential period of the pulse signal that detects the driving state of the motor, and determining whether the counted high-potential period or low-potential period of the pulse signal is longer than a certain reference period, The step is to determine whether the motor is driven normally, and when the high potential period or low potential period of the pulse signal is longer than a certain reference period, the driving of the powder detergent injection motor and the powder detergent injection solenoid is stopped. A method for detecting restraint of a motor for dispensing powdered detergent, characterized in that control is performed to a stage in which a warning is issued at the same time as a display is displayed.