KR100429619B1 - Amount of a laundry Sensing apparatus for washing machine - Google Patents

Abstract

According to a feature of the washing machine for detecting the amount of washing machine according to the present invention, a criterion for determining the washing amount is determined through a pulse time value obtained by adding up the ON-state time width of the pulse generated by the residual electromotive force of the washing machine motor. A first step of setting and storing the quantity determination reference data to be stored; a second step of counting and summing the on-state time of pulses generated by the residual electromotive force in the power-off state immediately after driving of the motor; and counting in the second step Comprising a third step of determining the dose and load amount by comparing the sum of the pulse time and the quantity determination reference data set in the first step, and the on-state time of each pulse generated by the residual electromotive force immediately after the predetermined time energization to the motor In addition, by measuring the pulse generation time to accurately detect the amount and load of laundry, Providing the wash water is effective to prevent damage to the laundry cloth and increase the washing efficiency.

Description

Amount of a laundry Sensing apparatus for washing machine}

The present invention relates to a quantity detection method of a washing machine, and more particularly, to detect a quantity of laundry by measuring the pulse generation time by adding the on-state time of each pulse generated by the residual electromotive force immediately after energizing the motor for a predetermined time. It is about a method.

In general, when a washing machine puts soiled clothing into a washing solution, the detergent separates the fibers from the fibers by the chemical action of the detergent, but the action of the detergent alone takes a long time, so that the speed of time of removal is increased by applying mechanical action such as friction or vibration. Will perform the action.

In the washing operation control of the washing machine, first, by detecting the quantity of clothes or the like put into the washing tank, if the quantity is determined, the water flow, the detergent, and the total washing time are set according to the quantity, and then the pulsator is rotated in reverse with the whole washing time Vortex the water through the laundry to perform the laundry administration to separate the stains on the laundry by friction with the laundry.

Next, when the washing administration is completed, the turbid water is discharged and the fresh water is supplied from the washing tank to perform a rinsing cycle for rinsing for the number of times already set in the system. When the rinsing stroke is completed, the water in the washing tank is discharged and the induction motor is rotated at a high speed at a predetermined speed to remove the laundry water by centrifugal separation to perform dehydration stroke.

1 is a circuit diagram showing a conventional capacity detection device of a washing machine, a motor 2 for driving a rotary blade (not shown), a capacitor connected between the main coil and the auxiliary coil of the motor 2, Controls the energization of the motor 2 via the triacs 4a, 4b, 4c and 4d connected between the motor 2 and the AC power source 1 and the triacs 4a, 4b, 4c and 4d. Control means (5) and pulse generating means (6) for generating a pulse in response to the voltage change of the condenser (3).

The control means 5 energizes the motor 2 for a predetermined time and detects the washing cloth or the load amount by the number of pulses generated from the pulse generating means 6 within the off period immediately after that.

2 shows a pulse generated by the pulse generating means, wherein an analog signal Vc generated by the residual electromotive force of the motor 2 is converted into a digital pulse signal Vo through the pulse generating means 6. Is converted.

The conventional washing machine dose detection device configured as described above operates as follows.

First, the laundry is put and water is supplied to the quantity detection level, and when the control means 5 applies a driving voltage to the motor 2, the rotating shaft of the motor 2 rotates, and the rotating force of the rotating shaft is rotated. Rotate (not shown).

When the driving voltage of the motor 2 is turned off after several seconds of driving of the motor 2, the rotary blades (not shown) are rotated for a predetermined time due to inertia. If the amount of the laundry cloth is large, the laundry cloth and the rotary blades ( The frictional force with (not shown) is generated a lot, and the rotation speed becomes small, and if the amount of the cloth is small, the rotation speed becomes large.

Therefore, when the rotary blades (not shown) and the motor (2) attached to the rotary shaft also rotates to generate the residual electromotive force, the pulse generating means (6) according to the voltage change through the condenser (3) generates a pulse Generating and applying to the control means (5) and the control means (5) by counting the number of residual pulses until the end of the rotation of the rotation of the rotor blades (not shown), and the number of rotational force according to the amount of cloth The amount of laundry cloth is determined by the number of pulses generated accordingly.

However, according to the conventional laundry washing machine and method of washing machine, when the amount of laundry is increased, the pulse is not generated or irregularly generated when the power is cut off due to the twisting of the cloth. Also, in the conventional case, when the washing machine dose is detected, only the on-time of the pulse signal is counted to detect the dose. In this case, when the noise occurs in the pulse signal, the counted time is counted when the noise does not occur. Since there is a significant difference from the value, there is a problem that the probability of error occurrence increases.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to calculate the on-state time sum of each pulse generated by the residual electromotive force immediately after the predetermined time energization to the motor to measure the pulse generation time The present invention provides a method of detecting a quantity of washing machine that accurately detects the quantity and load of laundry because the output can be increased to increase the resolution.

1 is a block diagram showing a quantity detection device of a washing machine according to the prior art,

2 is a graph showing a pulse generated in the residual electromotive force of the motor,

3 is a block diagram showing a quantity detection device of a washing machine according to the present invention;

Figure 4 is a graph showing a comparison of the pulse time according to the amount of laundry cloth according to the present invention,

5 is a flowchart illustrating a quantity detection method of a washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

11 AC power 12 Motor

13: condenser 14: triac

15: microcomputer 16: pulse generating means

17: memory

According to a feature of the quantity detection method of the washing machine according to the present invention for solving the above problems, the criterion for determining the amount of washing cloth through the pulse time value of the sum of the on-state time width of the pulse generated by the residual electromotive force of the washing machine motor A first step of setting and storing the quantity determination reference data to be set up; a second step of counting and summing the on-state time of pulses generated by the residual electromotive force in the power-off state immediately after driving of the motor; counting in the second step And a third step of comparing the summed pulse time with the quantity determination reference data set in the first step to determine a dose and a load amount, wherein the second step ends the on-state time of each pulse from the first pulse. Each measurement is made up to the pulse time and the sum is stored.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a block diagram showing the configuration of the washing machine of the washing machine according to the present invention, the motor 12 for driving a rotating blade (not shown) of the washing machine and generating a rotational force inversely proportional to the amount of the laundry by the residual electromotive force and The quantity detection unit 13 and 16 for converting the number of revolutions generated by the motor 12 into an electrical pulse signal, and the quantity determination reference data when the washing machine is manufactured are stored and set by the quantity detection unit 13 and 16. And control means (15, 17) for counting the on-state time of the converted pulse signal and comparing the quantity with reference to the quantity determination reference data to determine the amount of water and the level accordingly.

The quantity detectors 13 and 16 convert the analog signal into a digital pulse signal according to the capacitor 13 connecting the main coil and the auxiliary coil of the motor 12 and the voltage change of the capacitor 13. The control means (15, 17) is made of a pulse generating means 16, the control unit (15), the memory (17) storing the microcomputer 15, the quantity determination reference data set at the time of manufacturing the washing machine and the on-state time of the pulse signal It includes.

Further, triacs 14a, 14b, 14c, and 14d are installed between the motor 12 and the AC power source 11, and the control means 15 and 17 control the AC power source 11 so that the power source is The triacs 14a, 14b, 14c, and 14d are energized and applied to the motor 12.

The quantity determination reference data is carried out to detect the amount of load in the no-load state when assembling the product, and counts the pulse on state time generated by the residual rotation according to the microcomputer 15 and stores the counted pulse time in the memory 17. ).

In addition, in the initial state, the pulse signal on-state time according to the amount of washing cloth is counted by the microcomputer 15 to set each quantity determination reference data, and the value is stored in the memory 17.

Figure 4 shows the pulse generated according to the amount of laundry cloth, Figures 4a and 4b is a comparison showing the case where the amount of laundry cloth is large and small.

When the driving voltage of the motor 12 is turned off after several seconds of driving of the motor 12, the rotary blades (not shown) are left to rotate for a predetermined time due to inertia. If the amount of the laundry cloth is large, the laundry cloth and the rotary blades ( Not shown) and the frictional force is generated a lot, and the residual rotational speed is reduced at the same time, and accordingly, the amount of washing cloth is small, the residual rotational speed is increased and the time accordingly increases.

In the present invention, the laundry cloth amount is sensed by adding up the on-state time width of the pulse and comparing it with the quantity determination reference data.

The operation of the present invention configured as described above will be described with reference to the flowchart shown in FIG. 5.

The first step stores in the memory 17 the quantity determination reference data and the pulseless reference value, which are to be the criteria for determining the amount of washing cloth during manufacture of the washing machine (see S1).

At this time, the quantity determination reference data is carried out to detect the amount of load in the no-load state when assembling the product and count the pulse on state time generated in the pulse generating means 16 by the remaining rotation according to the count after the microcomputer (15) The combined pulse time and the amount of laundry and the on-state time of each pulse generated in accordance with the quantity of the laundry are added together to set the quantity determination reference data for each laundry and the value is stored in the memory 17.

The non-pulse reference value is a value for judging the last pulse. If the off state of the pulse during the off standby time of the motor 12 is maintained for more than a predetermined time until the next motor driving, the reference value for determining that the motor 12 has completely stopped rotating. to be.

In the second step, the laundry is put into the washing machine, water is supplied to the quantity detection level, and when the microcomputer 15 applies a driving voltage to the motor 12 for a predetermined time, the rotating shaft of the motor 12 rotates. The rotating force of the rotating shaft rotates the rotary blade (not shown). (See S2)

In the third step, the motor 12 stops driving by turning off the motor 12 of the second step S2 after a predetermined time, but the rotary blade (not shown) remains in rotation for a predetermined time due to inertia. This causes the pulse by the residual rotation after the motor is turned off in the pulse generating means 16 by changing the voltage of the motor 12 (see S3).

In the fourth step, it is determined whether the pulse is generated by the motor off of the third step S3. If the determination result of the fourth step is negative, the process returns to the second step S2 to again detect the quantity of the motor. Turns 12 on and off (see S4).

If the determination result of the fourth step S4 is affirmative, in the fifth step, it is determined that a pulse due to the remaining rotation of the motor 12 is generated, and the on-state time of the first pulse is counted by the microcomputer 15. In step 6, the on-state pulse of step 5 is monitored to change to 0V so that only the pulse time of the on-state can be counted (see S5 and S6).

If the pulse of the sixth step (S6) is not 0V, it is determined that the on state of the pulse is in progress and returns to the fifth step (S5) to continue the pulse time count, and in the sixth step (S6) If it is detected that the pulse is 0V, the seventh step ends the pulse time count of the fifth step S5 and stores the result value in the memory 17 and counts off time of the pulse (S7). )

In the eighth step, the pulse off time of the seventh step S7 is compared with the pulseless reference value set in the first step S1, and when the off time is smaller than the pulseless reference value, the process returns to the fourth step S4. It goes through the process of counting the time of another pulse that is generated (see S8).

However, if the pulse off time is greater than the non-pulse reference value, it is determined that the remaining rotation is completed. In the ninth step, the pulse on state time value stored in the memory 17 of the seventh step S7 is extracted through the addition operation. (See S9)

In the tenth step, the total amount of pulse on-state time extracted in the ninth step (S9) is compared with the quantity determination reference data set in the first step (S1) to determine the amount of washing cloth put into the washing machine, and the appropriate level of water. Water to reach (see S10).

At this time, if the measured pulse on-state time is greater than the medium water level reference value of the set quantity determination reference data, it is determined that the laundry cloth is small, and the measured pulse on-state time is smaller than the medium water level reference value of the selected quantity water determination reference data and higher than the high water level reference value. If large, it is determined that the laundry cloth is heavy, and if it is smaller than the high water level reference value, it is determined that the laundry cloth is large.

The quantity detection method of the washing machine of the present invention configured as described above has the effect of accurately detecting the quantity and load of the laundry to prevent the damage of the laundry cloth and increase the washing efficiency by providing the washing water at the appropriate level. .

Claims (4)

A first step of setting and storing the quantity determination reference data to be a reference for determining the amount of laundry cloth through a pulse time value obtained by adding up the on-state time widths of the pulses generated by the residual electromotive force of the washing machine motor; Counting and summing the on-state time of the pulses generated by the residual electromotive force in the power-off state immediately after driving of the motor; And a third step of determining a dose and a load amount by comparing the pulse time counted and summed in the second step with the dose determination reference data set in the first step, The second step is the quantity detection method of the washing machine, characterized in that for measuring the on-state time of each pulse from the first pulse to the last pulse time to store the sum value. delete delete The method of claim 1, The third step is a first step of determining that the laundry cloth is a small amount when the on-state pulse time measured in the second step is larger than the medium level reference value of the set amount of the determination reference data, and the on-state pulse measured in the second step When the time is smaller than the medium water level reference value of the selected quantity determination reference data and larger than the high water level reference value, it is determined that the laundry cloth is heavy; Detection method.