JPH1085481A - Washing machine serving also for dehydration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cloth rotation, to loosen the entanglement of laundry and to improve vibration performance at the time of dehydration by raising a water level inside a washing and dehydrating tank before the agitation end of a pulsator in a washing process or a rinsing process in a washing machine serving also for dehydration for automatically performing a series of the processes of washing, rinsing and the dehydration. SOLUTION: The pulsator 5 is freely rotatably disposed to the bottom part of the washing and dehydrating tank 4, the pulsator 5 and the washing and dehydrating tank 4 are driven by a motor 6, water is supplied from a water supply valve 9 to the inside of the washing and dehydrating tank 4 and the water level inside the washing and dehydrating tank 4 is detected by a water level detection means. The signals of the water level detection means are fetched to a control means, the opening/closing of the water supply valve 9 are controlled, the energizing control of the motor 6 is performed, the water level inside the washing and dehydrating tank 4 is raised from H1 to H2 prescribed time before the agitation end of the pulsator 5 in the washing process or the rinsing process and draining and the dehydration are performed after the agitation end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine that performs a series of washing, rinsing, and spinning operations automatically.

[0002]

2. Description of the Related Art Conventionally, this type of dewatering / washing machine has been known. When drainage and dehydration after each washing or rinsing step are performed in a series of steps, the reversal cycle during normal stirring of the pulsator without raising the water level. A method of loosening laundry with a so-called balance control water flow, which is driven with a shorter inversion cycle, is used. In general, the water level is corrected such that the water content of the laundry immediately after the water supply is supplied to the water level before stirring immediately after the operation is started.

[0003]

In such a conventional construction, the bath ratio of recent washing machines tends to decrease due to the conflicting trends of increasing the washing capacity and reducing the size of the washing machine body. The water content on the way also overlaps, and the laundry is easily entangled. As a result, the laundry tends to be unbalanced, the vibration at the time of dehydration is large, and low noise is required. Further, there is a problem that if the imbalance of the laundry is large, the load on the driving motor is also large.

The present invention solves the above-mentioned problems, and raises the water level in the washing and dewatering tub before the end of the pulsator stirring in the washing step or the rinsing step so as to improve the cloth circumference and disentangle the laundry. The purpose is to improve the vibration performance during dehydration.

[0005]

According to the present invention, in order to achieve the above object, a pulsator is rotatably arranged at the bottom of a washing and dewatering tub, and the pulsator and the washing and dewatering tub are driven by a motor to perform washing and dewatering. Water is supplied into the dehydration tub from the water supply means, and the water level in the washing and dehydration tub is detected by the water level detection means. The signal of the water level detection means is taken into the control means, the opening and closing of the water supply means is controlled and the motor is energized, and the water level in the washing and dewatering tub is raised a predetermined time before the end of the pulsator stirring in the washing step or the rinsing step. ,
After the completion of stirring, drainage and dehydration are performed.

[0006] Thus, at the water level before the water level of the washing and dewatering tub is raised, washing or rinsing can be performed with a strong water flow while preventing splashing with a minimum amount of detergent, and thereafter, the water level is raised. As a result, the bath ratio increases, the cloth circumference becomes better, the entanglement of the laundry is released, and the imbalance of the laundry is improved, so that the vibration performance can be improved.

[0007]

The invention according to claim 1 of the present invention comprises a pulsator rotatably disposed at the bottom of a washing and dewatering tub, a motor for driving the pulsator and the washing and dewatering tub, Water supply means for supplying water into the washing and dewatering tub, water level detecting means for detecting the water level in the washing and dewatering tub, and taking in signals from the water level detecting means to control the opening and closing of the water supply means and to control the energization of the motor. Control means for performing, the control means raises the water level in the washing and dewatering tub a predetermined time before the end of the pulsator stirring in the washing step or the rinsing step, drains after the end of the stirring,
In the water level before raising the water level of the washing and dewatering tub, washing or rinsing can be performed while preventing splashing with a minimum of detergent with a strong current, By raising the water level, the bath ratio rises, the cloth circumference becomes better, the entanglement of the laundry is released, the imbalance of the laundry is improved, and the vibration performance can be improved. As a result, the load on the driving motor can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a load amount detecting means for detecting a load in the washing and dewatering tub, and the control means comprises a pulsator in a washing step or a rinsing step. The water level in the washing and dewatering tub is raised to a predetermined bath ratio a predetermined time before the end of the stirring, and the drainage and dehydration are performed after the stirring is completed. Thus, the entanglement of the laundry can be released and the imbalance of the laundry can be improved, thereby improving the vibration performance.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the pulsator is inverted in a state where the water level in the washing and dewatering tub is raised and shorter than the inversion cycle during normal stirring. In a state where the bath ratio rises and the laundry circumference is good, the laundry can be loosened by the so-called balance control water flow, and the imbalance of the laundry is improved more Vibration performance can be improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 1, a washing machine outer frame 1 has a water receiving tub 3 suspended by four suspension rods 2. The washing and dewatering tub 4 is rotatably disposed in the water receiving tub 3, and a pulsator 5 is rotatably disposed at the bottom of the washing tub 4. The motor 6 drives the pulsator 5 and the washing and dewatering tub 4 via the V-belt 7 and the speed reduction mechanism 8.
The water supply valve (water supply means) 9 supplies water into the washing and dewatering tub 4, and the drain valve 10 drains the washing water in the water receiving tub 3 and the washing and dewatering tub 4.

The control device 11 is provided on the upper surface of the outer frame 1 of the washing machine and is configured as shown in FIG.
Each step of washing, rinsing, and dewatering is sequentially controlled, and the motor 6, the water supply valve 9, the drainage valve 10, and the like are sequentially controlled via the power switching means 14. The storage means 15 stores data necessary for the sequential control by the control means 12. The water level detecting means 16 detects the water level in the water receiving tank 3.

The control means 12 takes in the signal of the water level detecting means 16 in the washing step or the rinsing step, controls the opening and closing of the water supply valve 9, supplies water to the water level H 1 in the washing and dewatering tub 4, and energizes the motor 6. Control is performed, and the pulsator 5 stirs the water, the water level in the washing and dewatering tub 4 is raised to H2 a predetermined time (for example, one minute) before the pulsator 5 is stirred, and drainage and dewatering are performed after the stirring. Like that. Reference numeral 17 denotes a phase advance capacitor of the motor 6, reference numeral 18 denotes a power switch, and reference numeral 19 denotes a commercial power supply.

The operation of the above configuration will be described with reference to FIG. In step 31, the water level to be supplied to the washing and dewatering tub 4 is set by the operation display means 13, and in step 32, a start switch (not shown) is turned on. In step 33, the water supply valve 9 is turned on to start water supply. Step 3
When the set water level H1 is detected by the water level detection means 16 in step 4, the water supply valve 9 is turned off in step 35, and the motor 6 is driven to rotate the pulsator 5 in step 36 to stir.

In step 37, a predetermined time (1
Minute) before, the stirring is stopped at step 38, the water supply valve 9 is turned on to supply water at step 39, and when the set water level H2 is reached at step 40, the water supply valve 9 is turned off at step 41 and at step 42 The pulsator 5 is rotated by driving the motor 6 and agitated. Predetermined time (1 minute) in step 43
After the elapse, the stirring is stopped in step 44, and
At 5 and 46, drainage and dehydration are performed.

Thus, washing or rinsing can be performed with the strongest water flow at the time of the water level H1 with the minimum detergent to prevent water splash. However, in this case, since the bath ratio is relatively low, in the latter half of the stirring, the laundry tends to be entangled. Therefore, the water level is raised to H2, the bath ratio is raised, the cloth circumference is improved, the entanglement of the laundry is released, the imbalance of the laundry is improved, and the vibration performance can be improved. As a result, the load on the motor 6 can be reduced.

(Embodiment 2) As shown in FIG. 4, the cloth amount detecting means 20 detects the amount of the laundry in the washing and dewatering tub 4, and after the motor 6 is energized for a required time, the clothes The back electromotive force of the motor 6 is detected by the back electromotive force detecting means 21, and the amount of the laundry in the washing and dewatering tub 4 is detected based on the attenuation rate of the back electromotive force. The detected information is input to the control means 22, and the control means 22 raises the water level in the washing and dewatering tub 4 to a predetermined bath ratio a predetermined time (for example, one minute) before the end of the pulsator stirring in the washing step or the rinsing step. Let
After the stirring, drainage and dehydration are performed. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. The operation from step 33 to step 46 is the same as the operation of the first embodiment, and the description is omitted.

In step 47, a start switch (not shown) is turned on, and in step 48, the amount of laundry in the washing and dewatering tub 4 is detected by the cloth amount detecting means 20.
And the washing or rinsing water level H1 corresponding to the amount of laundry.
And the water level H2 to be stirred at a predetermined bath ratio for a predetermined time (for example, 1 minute) after the pulsator stirring is completed.

Thus, at the water level H1 before the water level of the washing and dewatering tub 4 is raised, washing or rinsing can be performed with a strong water flow while preventing splashing with a minimum amount of detergent. By raising the water level H2 to be agitated at the bath ratio, a predetermined bath ratio can be obtained with a minimum necessary amount of water, the laundry is loosened, the imbalance of the laundry is improved, and the vibration performance is improved. be able to.

(Embodiment 3) The control means 12 in FIG.
In the state in which the water level in the washing and spin-drying tub 4 is raised from H1 to H2, the pulsator 5 is turned on (0.6 seconds on) shorter than the reversing cycle (3 seconds on-1 second off) during normal stirring. −
(Off for 0.3 seconds), so-called balance control water flow. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. The operation from step 31 to step 41 is the same as the operation of the first embodiment, and therefore the description is omitted.

When the set water level H2 is reached in step 40,
In step 41, the water supply valve 9 is turned off, and in step 50, the motor 6 is driven to rotate the pulsator 5 and agitate. At this time, the pulsator 5 is set to a short reversal cycle (0.6 second on-
(0.3 seconds off) Drive with balance control water flow. After a predetermined time (1 minute) has passed in step 43, the stirring is stopped in step 44, and drainage and dehydration are performed in steps 45 and 46.

Thus, the laundry can be loosened by the so-called balance control water flow in a state where the bath ratio rises and the laundry is in good condition, so that the imbalance of the laundry is further improved and the vibration performance is improved. Can be.

In the present embodiment, the pulsator 5 is driven by a balance control water flow in a state where the water level in the washing and dewatering tub 4 is raised from H1 to H2 in the configuration of the first embodiment. However, in the configuration of the second embodiment, the pulsator 5 may be driven by the balance control water flow while the water level in the washing and dewatering tub 4 is raised from H1 to H2.

In this embodiment, the water is driven by the balance control water flow after the water level reaches H2. However, the operation of the balance control water flow may be performed while the water level changes from H1 to H2. In this case, the washing time is reduced.

Further, immediately after the water level reaches H2, the water is driven by the balance control water flow.
After reaching 2, after driving at the reversal cycle during normal stirring, it may be driven by a balance control water flow.

[0028]

As described above, according to the first aspect of the present invention, the pulsator rotatably disposed at the bottom of the washing and dewatering tub, and the pulsator and the washing and dewatering tub are driven. A motor, a water supply means for supplying water into the washing and dewatering tub, a water level detecting means for detecting a water level in the washing and dewatering tub, and controlling the opening and closing of the water supply means by taking in a signal of the water level detecting means. Control means for controlling the energization of the motor, wherein the control means raises the water level in the washing and dewatering tub a predetermined time before the end of the pulsator stirring in the washing step or the rinsing step, and drains and dehydrates after the end of the stirring. Since the water level in the washing and dewatering tub is raised, washing or rinsing can be performed with a strong stream of water while preventing splashing with a minimum amount of detergent. By increasing the, the better the surrounding fabric liquor ratio rises, unravel the entangled laundry, to improve the imbalance of the laundry can be improved vibration performance. As a result, the load on the driving motor can be reduced.

According to the second aspect of the present invention, there is provided a load detecting means for detecting a load in the washing and dewatering tub,
The control means raises the water level in the washing and dewatering tub to a predetermined bath ratio a predetermined time before the end of the pulsator stirring in the washing process or the rinsing process, and performs drainage and dewatering after the stirring is completed. With a limited amount of water, a predetermined bath ratio can be obtained, the entanglement of the laundry can be released, the imbalance of the laundry can be improved, and the vibration performance can be improved.

According to the third aspect of the present invention, the pulsator is driven with an inversion cycle shorter than the inversion cycle during normal stirring while the water level in the washing and dewatering tub is raised. Thus, the laundry can be loosened by the so-called balance control water flow in a state where the bath ratio rises and the laundry surroundings are good, so that the imbalance of the laundry can be further improved and the vibration performance can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a washing machine with dehydration according to a first embodiment of the present invention.

FIG. 2 is a block circuit diagram of the washing machine for combined use with dehydration.

FIG. 3 is an operation time chart of a main part of the washing machine for combined use with dehydration.

FIG. 4 is a block circuit diagram of a washing machine with dehydration according to a second embodiment of the present invention.

FIG. 5 is an operation time chart of main parts of the washing machine for combined use with dehydration.

FIG. 6 is an operation time chart of a main part of the washing machine for both dehydration according to the third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 washing and dewatering tank 5 pulsator 6 motor 9 water supply valve (water supply means) 12 control means 16 water level detection means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Moriki Fukuda 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] A pulsator rotatably disposed at the bottom of the washing and dewatering tub; a motor for driving the pulsator and the washing and dewatering tub; water supply means for supplying water to the washing and dewatering tub; A water level detecting means for detecting a water level in the dewatering tub; and a control means for taking in a signal from the water level detecting means, controlling opening and closing of the water supply means and controlling energization of the motor. A dehydration / washing machine in which the water level in the washing and dewatering tub is raised a predetermined time before the end of the pulsator agitation in the process or the rinsing process, and drainage and dehydration are performed after the agitation is completed. 2. A load detecting means for detecting a load in the washing and dewatering tub, wherein the control means determines a water level in the washing and dewatering tub a predetermined time before the end of the pulsator stirring in the washing or rinsing step. 2. The washing machine according to claim 1, wherein the bath ratio is increased up to a bath ratio, and after the stirring, drainage and dehydration are performed. 3. The washing machine according to claim 1, wherein the pulsator is driven at a reversing cycle shorter than the reversing cycle at the time of normal stirring while the water level in the washing and dehydrating tub is raised. .