JPS6058193A - Receiving amount detecting apparatus of washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention detects storage of articles such as cloth stored in a washing tub of a washing machine or water stored for washing the articles. BACKGROUND ART The apparatus is configured to automatically perform washing by determining the amount of washing water, washing time, spin-drying time, etc. according to the thickness and bulk of the laundry items, that is, the accommodation. Therefore, it is necessary to detect the amount of laundry to be washed.

In order to detect such storage wind, a signal is emitted toward the laundry item or water, the reflected wave from the laundry item or water is received, and the time from the signal emission to the reception of the reflected wave is detected. You can know the amount of storage. When the laundry to be washed is put into the washing tub, the washing tub swings vertically and horizontally, so that the measurement time corresponding to the bulk of the laundry varies. Therefore, it becomes impossible to accurately detect the storage amount.

[Object] The object of the present invention is to provide a storage amount detection device for a washing machine that can accurately detect the storage amount of laundry or water stored in a washing tub of a washing machine. It is.

Embodiment FIG. 1 is a sectional view of an embodiment of the present invention. All or water is stored. The laundry object 2 is agitated by the agitator 1 and 3, and is also washed. The stirring means 3 is driven by a motor 4. At the top of the washing tub 1, there are installed a transmitter (11) for emitting ultrasonic waves of approximately 40 kHz, and a receiver 6 for transmitting the reflected waves from the laundry 2. Washing 4; "r 1 may sway vertically and horizontally when the laundry item 2 is loaded.

Fully automatic IW 4 decimal O', washing I, N2 in TL
Washing by stirring means 3, rinsing with water, and dehydration are performed. Dehydration operation 11, washing jlj7
1 is driven 11 times around the lead M axis at high speed,
To make this possible, the washing tub 1 is resiliently suspended and supported by a spring. Therefore washing flV
When washing 'M 2 is put into washing tub 1 when the rotation of 'i' is stopped, is washing 'i? 44r; 11 swings vertically and horizontally, and there is a possibility that the amount of cloth cannot be detected accurately as described above in the conventional method. The misfire jllJ solves these problems of the prior art and makes it possible to accurately detect the cloth 111.

FIG. 2 is an electrical circuit diagram of one embodiment of the present invention. The operation control oscillation circuit 40 includes a comparison circuit h'i53:3, a capacitor 29, resistors 17 to 22, and a diode 37.3.
8, the output from this motion control oscillator circuit 40 has a duration of, for example, 10 m 5 ec and a rest period of 50 m sec, and an ultrasonic light 4 Iν (via circuit 42).
applied to transistor 41. The ultrasonic oscillation circuit 42 includes the inverting circuit 32. /13, 44, capacitor 28 and resistors 14-16.

The line 45 from the operation control oscillator circuit 40 is connected to the line 45 shown in FIG. 3 (1).
A signal indicated by is generated intermittently. As a result, the ultrasonic oscillation circuit 42 generates an ultrasonic wave as shown in FIG. 3(2) when the signal from the line 45 is at a high level.

The signal from the resonator 6 is amplified by the amplifier circuit 46. This amplifier circuit 46 includes an operational amplifier ZH3], capacitors 24-26, and resistors 8-12. Amplifier circuit 4
The output from 6 is applied to one input of the comparison circuit 30 via the fI'1 dividing circuit 47. Integrating circuit 47 includes a diode 36, a capacitor 23, and resistors 6 and 7.

The other input of the comparison circuit 30 is given a signal for setting a reference discrimination level l divided by the resistors 4 and 5.

The receiver 6 receives a signal that is a reflected wave emitted from the oscillator 5 and reflected by the laundry item 2, delayed by a time W as shown in FIG. 3(3). The integrating circuit 47 is shown in FIG.
) is applied to the comparator circuit 30, and the comparator circuit 30
performs level discrimination using the discrimination level l determined by the resistors 4 and 5, derives the waveform shown in FIG. 3 (5) on the line 48, and sets the flip 70 knob 34.

The flip 70 knob 34 is set at a time delayed by a further time ΔW from the time W depending on the self-propelled unit of the integrating circuit 47. A resistor L2,3 is connected in connection with the comparator circuit 30. This flip-flop 34 is reset by a signal derived from the operation control oscillator circuit 40 on line 45. has the waveform shown in FIG. 3(6), and is applied to the processing circuit 35 realized by a microcomputer or the like.

When laundry items 2 are put into a washing tub 1 prior to washing, the washing tub 1 swings vertically and horizontally. This vibration of the washing tub 1 is a damped vibration. In order to detect the amount of laundry 2 in the washing tub 1, it is not necessary to detect the top of the laundry 2, but to detect a position recessed from the top surface of the laundry. It is possible to detect the amount of cloth 2 to be washed as accurately as possible. Therefore, washing tub 1
After putting the laundry item 2 into the washing machine, the amount of cloth of the laundry item 2 is detected several times (twice in FIG. Detected as the amount of laundry. Based on the amount of laundry to be washed 2 obtained in this way, the amount of water to be supplied to the washing machine 1, the washing time by the stirring means 3,
and the dewatering operation time are set by the processing circuit 35.

Referring to FIG. 4, in order to detect in the processing circuit 35 the amount of cloth stored in the laundry object 2 in the washing machine IQ 1, the process moves from step n1 to step n2, and the reset output Q of the flip-flop 34 is detected. It is determined whether or not it is at a high level, and if it is at a high level, time is counted using a timer 49 included in the processing circuit 35 in step II3. step n4
Now, it is determined whether the reset output Q of the 7-tube float 34 is at low level or not, and during the period when it is at high level, the time is used as an argument and F6e is executed. When the reset output Q of the flip-flop 34 becomes low level, the timer 49 stops counting the time, and the first time [1] determines whether the data is 1 or not.
θ1, and when it is the first li+ data, the memory 5
Store to 0. In this way, each time the operation control oscillation circuit 40 generates an intermittent oscillation, the timer 4 calculates the time (W + ΔW).
9, and when it is the second data, the process moves from step n6 to step n8, and it is determined whether the time is longer than the previous first data. When the data of [2 times 1] is longer than the first data, the value corresponding to the long 7TI value of the second time is set as the cloth amount. Further, when the second data is less than the data of the first time 1], the value corresponding to the time of the first time is detected as a cloth.

In the above-mentioned embodiment, in order to detect the storage amount, the times at which two Hals occur in the operation control oscillation circuit 40 are compared and detected, but the times are further compared three or more times and the front side is determined each time. The contents of the memory 50 may be compared with the argument data of , and the storage amount corresponding to the longest value may be detected by replacing the contents of the memory 50 with the data having the largest count data and the longest Zunawa time (W+ΔW). .

Effects As described above, according to the present invention, even if the washing tub vibrates, it is possible to accurately detect the amount of laundry or water stored in the washing tub, regardless of the vibration. Become.

[Brief explanation of drawings]

Fig. 1 is a simplified sectional view of a washing machine according to an embodiment of the present invention, Fig. 2 is an electric circuit diagram of the embodiment, and Fig. 3 explains the operation of the electric circuit diagram shown in Fig. 2. Waveform IJ for
! FIG. 4 is a flowchart for explaining the operation of the processing circuit 35. DESCRIPTION OF SYMBOLS 1... Washing tub, 2-... To be washed, 3... Stirring means, 5... Oscillator, 6... Receiver, 34... Flip 70 tube, 35... Processing circuit , 40... Operation control oscillation circuit, 42... Ultrasonic oscillation circuit, 46... Increase'
I'ii1 circuit, 47... Integral circuit agent Patent attorney Kei Nishi

Claims (1)

[Scope of Claims] Means for intermittently emitting signals into the washing tub; means for receiving reflected waves of the emitted signals; and receiving means for receiving reflected waves after emitting the signals by the emitting means. 4. A storage amount detection device according to item 41, characterized in that the storage amount detection device includes means for comparing the elapsed time for each firing and deriving a signal representing the amount stored in the tank corresponding to the longest value of the time.