JPH02215497A - Washing machine - Google Patents

Abstract

PURPOSE:To obtain a suitable rinsing effect by providing a control means to start the count of a rinsing process time based on a signal from a comparing means when the data of the rinsing process time are in a prescribed range to reference data. CONSTITUTION:The revolution data NA in the beginning of rinsing is larger than the revolution data N at a washing process time. After that, when laundry is peeled off and loosely turned gradually, the laundry goes to be resistance to a rotating fan and the data NA are decreased. Accordingly, the revolution data NA are compared with the data N stored in a RAM 27 and when difference between the NA and N is more than ten times, it is judged that the laundry is still stuck on a wall in a tank. Then, the revolution data NA for 15 seconds are detected again and in the following processing, this operation is repeated until the difference between NA and N is less than the ten times. When the difference between NA and N is less than the ten times, the subtraction of a substracting counter is started and a stop time in an inversion period is changed to 0.5 seconds. Then, the practical rinsing process is executed in a set time.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a washing machine.

(b) Conventional technology As a conventional example, water is supplied to a specified water level in the washing tub, the rotor blades are rotated for a specified period of time, and the amount of laundry is determined based on the degree of inertial rotation, and the water level and process time are determined. The washing machine to be determined is based on Japanese Patent Publication No. 63-46717 (DO6F 33
102).

(c) Problems to be Solved by the Invention In conventional washing machines, after washing, a short period of intermediate dehydration is performed to remove a certain amount of the detergent liquid before proceeding to the rinsing process. There is a problem in that the centrifugal force causes the laundry to stick to the inner surface of the tub and is difficult to loosen during the rinsing process, which shortens the actual rinsing time and makes it impossible to obtain the desired rinsing effect.

The present invention solves these problems in washing machines.

(d) Means to solve the problem The washing machine of the present invention has the following configuration.

Detection means for detecting rotation speed data of the rotor blade or data correlated with this data; Storage means for storing the data detected by the detection means as reference data at a predetermined time period excluding the initial period during the washing process; rinsing. Comparing means for comparing the data detected by the detecting means with the reference data during the process, and based on a signal from the comparing means, the data during the rinsing process is within a predetermined range with respect to the reference data. control means for starting timing of the rinsing process time when the rinsing process time is reached;

(e) Effect: By detecting that the data during the rinsing process becomes almost the same as the data during the washing process, it is determined that the laundry stuck to the inner surface of the tub has loosened, and from this point on, the rinsing process time Start timing.

(f) Examples Embodiments of the present invention will be described based on the drawings.

In Figure 2, (1) is the machine frame, (2) is the operating section provided at the upper rear of the machine frame (1), and (3) is the machine frame (1).
An outer tank elastically supported inside (4) is installed inside the outer tank (3) and has a large number of dewatering holes (5) around the periphery, and (6) is the above-mentioned Laundry 1! (4) is a rotary blade disposed at the bottom of the washing tub (4), and (7) is a drive motor attached to the outer bottom of the outer platform (3), and the washing tub (4) and the rotating
(6), small pulley (8), large pulley (9), belt (1)
0) and a power transmission mechanism (113), the rotary blade (6) is reversed during washing, and the washing tub (4) and rotary blade (6) are both rotated in one direction at high speed during dehydration.(12 ) is a drain provided at the bottom of the outer tank (3), (13) is a drain pipe connected to the drain (12),
(14) is an electric drainage valve interposed in the 11th water pipe (13), (15) is an air trap provided at the bottom corner of the outer tank (3), and It communicates with a water level sensor (16) via a pressure hose (17). (18) is a water supply solenoid valve interposed in the water supply pipe (19), (20) is an overflow port provided at the upper part of the outer tank (3), and <21) is not connected to the overflow port (2α). It is a flood hose.

The water level sensor (16) detects a change in the water level in the washing tub (4) as a change in pressure, moves a magnetic body within the coil in response to this pressure, and as a result detects the change in water level as a change in inductance of the coil. This change in inductance is converted into a change in oscillation frequency and input to a microcomputer, which will be described later. Thereby, the microcomputer continuously detects the water level in the tank over a wide range based on the change in the oscillation frequency.

Now, in FIG. 3, (22) is a magnet attached to the large pulley (9), (23) is a reed switch disposed close to the bottom surface of the magnet (22), and (24) is a magnet attached to the large pulley (9). ) is a holding plate of the reed switch (23), and the power transmission 1
It is attached to the outer surface of the a structure (11).

In this way, when the large pulley (9) rotates, the magnet (22) also rotates, so the reed switch (23)
is closed only when the magnet (22) approaches, that is, the loaded switch (23) repeats opening and closing as the large pulley (9) rotates.

The opening/closing pulse signal of this reed switch (23) is input as is or after being converted to an appropriate pulse width by a monostable multivibrator or the like, to a microcombinator (25) to be described later. The microcomputer is
By counting the number of input pulses, the number of rotations of the large pulley (9), that is, the rotary blade (6) is known.

Now, such a fully automatic washing machine is controlled by a microcomputer, and hereafter this microcomputer (25) (
(hereinafter referred to as microcontroller) (For example, Sanyo Electric Co., Ltd. L
The control mechanism of a washing machine (C66506B type) will be explained based on FIG.

The microcomputer (25) includes a CPU (26), a RAM
(27), ROM <28), timer (29), system bus (30) and input/output board (31) to (37)
It consists of

The CPU (261 is a control unit (38) and a calculation unit (3)
9), the control unit (38) retrieves and executes instructions, and the arithmetic unit (39) controls the input device and The above R performs arithmetic processing such as binary addition, logical operation, increase/decrease, and comparison on data given from memory.
A M (271 is for storing data regarding the washing machine, and the ROM+28) stores means for operating the washing machine in advance, setting conditions for judgment, and rules for processing various information. etc. are loaded.

The input boats (31) to (34) include an input key circuit (40) consisting of the various operation keys, a water level sensor (16), and a top lid safety switch (
41) and the reed switch (23), and based on this information, the output boat (35) (3
6) From (37), the LE composed of the above LED group
A control signal is sent to the D drive circuit (42), a buzzer circuit (43) for process end notification or abnormality notification, and a three-load drive circuit (44) consisting of a bidirectional thyristor and the like.

The load drive circuit (44), in accordance with the control signal from the microcomputer (25), controls the left and right rotation circuit (45) of the rotor blade drive motor (7) (146), the water supply solenoid valve drive circuit (
47) and the operation of the drain electric valve drive circuit (48). (49) is a power supply circuit that supplies voltage to the microcomputer (25), and (50) is a reset signal generation circuit.

The operation based on such a configuration will be explained with reference to FIG.

When the program start key is operated, water is supplied to the set water level (5-1), and the washing time TA is displayed on the subtraction counter.
(second) (S-2), start subtracting the washing time (S-3), and stop the rotary blade (6) for 1.5 seconds on the right side - 0.8 seconds - 1.3 seconds on the left side. Second lock 0.8 - Right 1.4 Lock 0.8 - Left 1.4 - Body lock 0.8 - Right 1.3 Lock 0
．． 8-Left 1.5-Pause 0.8-Right 1.4 One stop 0.8-
Flip left and right at a cycle of left 1, 4 - I-Kodome 0° 8 - right 1.5 <5-4).

Then, from the time when the remaining washing time reaches 60 seconds,
Count the rotation speed N based on the signal from the reed switch (23) for a second (S-5) (S-6>), and store this rotation speed data N in the RAM (27) for - hours (S-5) (S-6>)
S=7).

When the washing process is completed, drainage and short-term intermediate dehydration are performed (S-8), and the process moves to the rinsing process.

In the rinsing process, first supply water to the set water level (S-9>
, subtract the rinse time T on the counter.

(second) (S-10), rotate the rotor blade (6) in the same period as the washing process (S-11), and simultaneously detect the rotation speed data NA for 15 seconds (S-12). (
S-13) (S-14).

Now, at the beginning of the rinsing process, the laundry sticks to the inner wall of the tub due to the previous spin-drying operation, and there is little laundry moving around, so naturally the rotation speed data NA at the beginning of the rinsing process is
The rotation speed data N becomes larger than the rotation speed data N during the washing process, and then as the laundry peels off and moves around, it becomes a resistance to the rotary blade (6) and the data NA decreases.

Therefore, compare the rotation speed data NA and the data N stored in the RAM (27) (S-15). If the difference between NA and N is 10 times or more, the laundry still sticks to the inner wall of the tub. It is determined that the rotation speed data NA for 15 seconds is detected again, and the process is repeated until the difference between NA and N becomes less than 10 times.

Then, from the time when the difference between NA and N becomes less than 10 times, the subtraction counter starts subtracting (S-1
6>, the pause time during the reversal period is changed to 0.5 seconds (S-17), and the substantial rinsing process is executed within the set time.

Also, when repeating the rinsing process, (S-9) to (S-9)
-17).

In this embodiment, data on the number of rotations of the rotor blade within a predetermined time is used, but the time T required for the number of rotations of the rotor blade to reach the number of rotations formed by the rotor blade may be used as data. Furthermore, the length of the inertial rotation time after the rotary blade has rotated for a predetermined period of time, the current value of the drive motor, etc. can also be used as data, as long as there is a correlation with the rotation speed of the rotary blade.

Further, although the number of rotations, that is, the number of pulses was counted as the number of rotations, the rotation speed may also be used, and the rotation speed can be detected by the width of the pulse.

(l.) Effects of the invention In the washing machine of the invention, the rinsing process time can be reduced by
Appropriate rinsing effects can be obtained since the rinsing is performed after the laundry is circulating well.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the operation of the washing machine of the present invention;
FIG. 2 is an internal mechanism diagram of the washing machine, FIG. 3 is an enlarged view of the power transmission mechanism, and FIG. 4 is a block circuit diagram of the control mechanism. (6)...Rotary blade, (7)...Drive motor (drive means), <22)...Magnet, (23)...Reed switch (<22) (23): Detection means), (27
)...RAM (storage means), (38)...control unit (
(control means), (39)... calculation section (comparison means).

Claims (1)

[Claims] (1) A rotary blade rotatably disposed in a washing tub, a rotation driving means for the rotary blade, a detection means for detecting rotation speed data of the rotary blade or data correlated with this data, during the washing process. Storage means for storing the data detected by the detection means as reference data at a predetermined time period excluding an initial period; Comparison means for comparing the data detected by the detection means during the rinsing step with the reference data; and the comparison means. A washing machine characterized by comprising: control means that starts measuring the rinsing process time when the data during the rinsing process falls within a predetermined range with respect to the reference data, based on a signal from the rinsing process. Machine.