JP2011167427A - Drum washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the rinsing performance of a laundry regarding a drum washing machine performing washing of clothes and the like. <P>SOLUTION: The drum washing machine includes a rotary drum 1 rotatably arranged in a water receiving tank 3, a motor 5 for driving the rotary drum 1, a water supply means 11 for supplying water into the water receiving tank 3, a water draining means 10 for draining the wash water in the water receiving tank 3, and a control means 22 for sequentially controlling the washing process, rinsing process and draining process. The control means 22 makes the maximum rotation number of the rotary drum 1 in intermediate draining in the rinsing process higher than the rotation number of the rotary drum 1 in balance control and lower than the rotation number of the rotary drum 1 in the final draining process, and makes the stirring time after the termination of the supply of a prescribed water amount in the rinsing process longer than the holding time at the maximum rotation number of the rotary drum 1 in the intermediate draining. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drum type washing machine for washing clothes and the like.

  Conventionally, this type of drum-type washing machine is configured as shown in FIGS. 6 and 7 (see, for example, Patent Document 1). Hereinafter, the configuration will be described. The rotating drum 1 is provided with a large number of water passage holes 2 on the peripheral side portion and is rotatably disposed in the water receiving tank 3. A rotating shaft 4 is provided in a substantially horizontal direction at the center of rotation of the rotating drum 1, and a motor 5 is connected to the rotating shaft 4 to rotate the rotating drum 1. Several protruding plates 6 are provided on the inner wall surface of the rotating drum 1.

  The water receiving tub 3 is suspended in the washing machine body 7 so as to be swingable by a spring body 8, one end of the drain hose 9 is connected to the lower part of the water receiving tub 3, and the other end of the drain hose 9 is connected to the drain pump. The washing water in the water receiving tub 3 is drained by connecting to 10. The water supply valve 11 supplies washing water into the water receiving tank 3. The water level detection means 12 detects the water level in the water receiving tank 3.

  The control device 13 has a control means 14 composed of a microcomputer, controls the operation of the motor 5, the drainage pump 10, the water supply valve 11 and the like via the power switching means 15, and performs a series of washing, rinsing, dehydration and the like. The process is sequentially controlled. The input setting means 16 sets the driving course and the like, and the control means 14 inputs information from the input setting means 16 and displays it on the display means 17 based on the information to notify the user. The storage unit 18 stores data necessary for control by the control unit 14. In addition, 19 is a commercial power source and 20 is a power switch.

  The operation in the above configuration will be described. When the laundry and detergent are put into the rotary drum 1, the power switch 20 is turned on, the start button (not shown) is pressed, and the washing process is started, the water supply valve 11 operates. When water is supplied into the water receiving tank 3 and the first predetermined water level is detected by the water level detecting means 12, the motor 5 is driven. Further, when a second predetermined water level higher than the first predetermined water level is detected, the water supply is stopped.

  In the washing step, since water is contained in the laundry, the rotating drum 1 is normally rotated, stopped, reversed, stopped and driven by the motor 5 at a predetermined number of rotations and a predetermined time to perform stirring. The laundry in the rotating drum 1 is caught by the protruding plate 6 by the rotation of the rotating drum 1, lifted, and falls onto the water surface. By this operation, the detergent is gradually dissolved to become washing water, which acts on the dirt of the laundry. When the washing process is completed, the drainage pump 10 is operated to drain the washing water in the water receiving tub 3.

  In the intermediate dehydration process of the rinsing process, first, the motor 5 is continuously rotated at a predetermined rotation speed and a predetermined time, and the rotation speed is adjusted in a state where the laundry in the rotary drum 1 is attached to the inner wall of the rotary drum 1. The speed is increased and the water contained in the laundry is dehydrated by the centrifugal force.

  Next, as in the washing step, the rotating drum 1 is rotated by the motor 5 while supplying water, and the laundry in the rotating drum 1 is caught by the protruding plate 6 by stirring and lifted and falls onto the water surface. By this operation, the rinsing water is absorbed and discharged by the laundry, and the detergent liquid in the laundry is diluted. When the rinsing process is completed, the drain pump 10 is operated to drain the rinse water in the water receiving tank 3.

JP 10-216390 A

  However, in the conventional configuration, in the rinsing process, the washing performance in the rotating drum 1 is given to the laundry in the rotating drum 1 by agitation of the rotating drum 1 to provide a mechanical force to ensure the rinsing performance. For this reason, in a drum type washing machine with a small amount of water supply, it takes time until the rinsing water of the laundry is uniformly applied, resulting in uneven rinsing. In addition, there is a problem that it takes a long time to rinse until the detergent component penetrating the laundry is removed.

  The present invention solves the above-described conventional problems, and an object thereof is to improve the rinsing performance of laundry.

  In order to solve the above-described conventional problems, a drum-type washing machine according to the present invention includes a rotating drum rotatably disposed in a water receiving tub, a motor for driving the rotating drum, and water supply in the water receiving tub. Water supply means for draining, draining means for draining the washing water in the water receiving tub, and control means for controlling the driving of the motor and sequentially controlling the washing process, the rinsing process, and the dehydrating process, the control means comprising: The maximum rotation speed of the intermediate dehydration in the rinsing process is set higher than the rotation speed of the balance control and lower than the rotation speed of the final dehydration process, and the stirring time after completion of the predetermined water supply in the rinsing process is set to It is longer than the holding time at the maximum rotation speed.

  As a result, in the rinsing step, the stirring time after completion of water supply with a predetermined amount of water that provides the best rinsing performance can be lengthened, the rinsing performance can be improved, and the fabric pain of the laundry due to intermediate dehydration is reduced. be able to.

  The drum type washing machine of the present invention can improve the rinsing performance of the laundry and can reduce the fabric pain of the laundry due to intermediate dehydration.

Sectional drawing of the drum type washing machine in Embodiment 1 of this invention Block diagram of the drum type washing machine Time chart showing the operation of the rinsing process of the drum type washing machine Time chart showing the operation of the rinsing process of the drum type washing machine Operation explanatory diagram of the drum type washing machine Sectional view of a conventional drum-type washing machine Block diagram of the drum type washing machine

A first aspect of the present invention relates to a rotating drum rotatably disposed in a water receiving tank, a motor for driving the rotating drum, water supply means for supplying water to the water receiving tank, and washing water in the water receiving tank. And a control means for controlling the driving of the motor and sequentially controlling the washing process, the rinsing process, and the dewatering process, and the control means determines the maximum rotational speed of the intermediate dewatering in the rinsing process. In addition, the rotation speed is higher than the rotation speed of the balance control and lower than the rotation speed of the final dehydration process, and the stirring time after the completion of the predetermined water supply in the rinsing process is longer than the holding time at the maximum rotation speed of the intermediate dehydration. The stirring time after completion of water supply with a predetermined amount of water that provides the best rinsing performance can be lengthened, and the rinsing performance can be improved. In intermediate dehydration, the relationship between the amount of drainage and the intermediate dehydration time shows a saturation curve, and when the dehydration speed of the intermediate dehydration reaches the maximum rotation speed, the dehydration time at the maximum rotation speed elapses. The amount of waste water from In addition, the detergent concentration of the waste water decreases as the rotational speed of the rotating drum increases. Therefore, the rinsing performance can be improved by lengthening the stirring time after the completion of the predetermined water supply with which the rinsing performance is good. Further, since the maximum rotation speed of intermediate dehydration is lower than the rotation speed of final dehydration, it is possible to reduce the fabric pain of the laundry due to the intermediate dehydration. Further, the agitation after the completion of the predetermined amount of water supply compared with the intermediate dehydration can reduce the drive power consumption of the rotating drum and reduce the power consumption to enhance the rinsing effect. Also, the amount of water remaining in the laundry is slightly increased. By using this water, the water supplied at the time of rinsing can be saved, or the rinsing water can be added as usual to increase the rinsing water and improve the rinsing performance. Can do.

  In the second aspect of the invention, in particular, the drum type washing machine of the first aspect of the invention is provided with a drying device for drying clothes, and in the washing mode in which the drying operation is performed, the control means performs the maximum rotation of intermediate dehydration in the rinsing process. When the number of rotations is set to the same number of rotations as the maximum number of intermediate dehydrations in the washing mode in which the clothes are not dried, the laundry is rinsed even when the drying operation is performed after washing in the rotating drum. The performance can be improved and the cloth pain of the laundry due to the intermediate dehydration can be reduced.

  In the third invention, in particular, the control means of the first or second invention executes the rinsing process twice, and the intermediate dehydration time of the second rinsing process is shorter than the intermediate dehydration time of the first rinsing process. As a result, it is possible to increase the amount of water with low detergent concentration remaining in the laundry after the intermediate dehydration in the second rinsing step, and to improve the rinsing performance by using the agitation rinsing in the second rinsing step. can do.

  In the fourth aspect of the invention, in particular, the control means of the first or second aspect of the invention executes the rinsing process twice, and sets the stirring time after the completion of the predetermined amount of water supply in the second rinsing process to the maximum rotation of the intermediate dehydration. By making it longer than the retention time in number, in the second rinsing step, there is little remaining of dirty water in the laundry to be subjected to intermediate dewatering, and the laundry after the predetermined amount of water supply is completed is sufficiently rinsed , The rinsing effect can be enhanced.

  In the fifth aspect of the invention, in particular, the rotating shaft of the rotating drum of any one of the first to fourth aspects can be inclined forward so as to improve the contact with the laundry with a small amount of rinse water. And the rinsing effect can be enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a block circuit diagram thereof, FIG. 3 is a time chart showing an operation of a first rinsing process, and FIG. FIG. 5 is an operation explanatory diagram showing the operation of the second rinsing process. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and the description uses the thing of a prior art example.

  1 to 5, the control device 21 has a control means 22 constituted by a microcomputer, and via a power switching means 15, a motor 5, a drainage pump (drainage means) 10, a water supply valve (water supply means) 11, etc. And controlling a series of processes such as washing, rinsing and dehydration sequentially. The rotation speed detection means 23 detects the rotation speed of the rotary drum 1. The rotation speed of the rotation drum 1 detected by the rotation speed detection means 23 is input to the control means 22. The rotational speed of the rotary drum 1 is controlled via The rotating drum 1 has a rotating shaft 4 that is inclined forwardly from the horizontal direction.

  In the washing mode in which the clothes are not dried, the control means 22 activates the water supply valve 11 in the washing step to supply washing water into the water receiving tub 3 to wet the laundry in the rotating drum 1, Dissolve the detergent. Further, the control means 22 controls the motor 5 and rotates the rotating drum 1 by this motor 5. As a result, the laundry in the rotating drum 1 is caught by the protruding plate 6 and is lifted and dropped on the water surface where the detergent is dissolved, and washing is performed by penetration and discharge of the detergent into the laundry. Remove dirt.

  When the washing process ends, the control means 22 operates the drain pump 10 to drain the washing water in the water receiving tub 3 and shifts to the first rinsing process. FIG. 3 shows the first rinsing step, in which the steps of intermediate dewatering, water supply stirring, stirring after completion of water supply with a predetermined amount of water, and drainage are sequentially performed.

  The control means 22 sends a signal to the motor 5 to start a balance control operation for the laundry in the rotary drum 1 necessary for performing intermediate dehydration. This balance control operation is performed using a general vibration detection sensor (not shown) or the like in order to reduce vibration when the rotary drum 1 is rotated at a high speed, and the rotation speed is, for example, about 50 r / min.

  After the balance control operation is completed, the control means 22 controls the motor 5 by gradually increasing the number of revolutions of the motor 5, and increases the number of revolutions of the rotary drum 1 to dehydrate the washing water from the laundry. In the intermediate dehydration step, the rotational speed of the rotary drum 1 after the completion of balance control increases to the set maximum rotational speed, and rotates at the maximum rotational speed for a predetermined time t1, and then the rotational speed decreases and stops. min.

  The maximum number of rotations of the rotating drum 1 in the intermediate dehydration process is set higher than the number of rotations at the time of balance control and lower than the number of rotations in the final dehydration process in the washing mode in which clothes are not dried, for example, 900 r / min. For example, it is 800 r / min. After a predetermined time t1 rotation at 800 r / min, the control means 22 stops the rotary drum 1 via the power switching means 15.

  The rotation speed of the rotary drum 1 in the final dehydration step is different between the laundry mode in which clothes are dried and the laundry mode in which clothes are not dried. Specifically, the rotation speed of the rotating drum 1 in the washing mode in which clothes are not dried is set to 900 r / min, and the rotation speed of the rotating drum 1 in the washing mode in which clothes are dried is 1500 r / min. (See FIG. 5).

  In the washing mode in which the clothes are not dried, the clothes are taken out from the rotating drum 1 and dried after the final dehydration process is completed. However, if the rotation speed of the rotating drum 1 for final dehydration is set high, a large amount of moisture comes out of the clothes and the clothes Many wrinkles are generated, and when the clothes are dried, many wrinkles remain even if the clothes are dried. Therefore, in the washing mode in which clothes are not dried, the rotational speed of the rotary drum 1 in the final dehydration process is set to about 900 r / min.

  On the other hand, in the washing mode in which clothes are dried, drying with warm air is performed in the washing machine after completion of the final dehydration step. At this time, in the final dehydration step, drying of the clothes can be accelerated by reducing the water remaining in the clothes, which saves energy. Since the drying is performed by warm air in the washing machine, the wrinkle state after the drying is not greatly changed by the remaining amount of moisture in this range with respect to the clothing, so the rotational speed of the rotary drum 1 in the final dehydration process Can be set as high as 1500 r / min, for example.

After completion of the intermediate dehydration, the laundry is stuck to the inner peripheral wall surface of the rotary drum 1. First, the control means 22 opens the water supply valve 11 and accumulates rinsing water in the water receiving tank 3 while rotating the rotating drum 1 in a certain direction via the power switching means 15. At this time, the rotational speed of the rotating drum 1 is, for example, 80 r / min. With this rotational speed, the laundry stuck to the inner peripheral wall surface of the rotating drum 1 is almost stuck to the rotating drum 1 without collapsing. Yes.

  When the rinsing water accumulates in the water receiving tank 3 and the water level detection means 12 detects the water level N1, the control means 22 stops water supply and raises the rotational speed of the rotary drum 1 from 80 r / min to, for example, 170 r / min. After that, the rotation speed is reduced and water supply is resumed. When the water level detection means 12 detects the water level N2, the control means 22 stops water supply and starts measuring the stirring time after completion of the predetermined water supply of the rotary drum 1.

  The control means 22 performs the stirring operation of the rotary drum 1 and peels off the laundry stuck to the rotary drum 1 from the rotary drum 1 and agitates the laundry by a tumbling operation, and is rinse water accumulated in the water receiving tub 3. Do too much. The stirring time t2 is set longer than the predetermined time t1 at the maximum rotation speed of the intermediate dewatering step.

  The stirring time t2 is generally 5 minutes or less because the effect of rinsing decreases as the stirring time t2 becomes longer and the stirring time t2 becomes longer. When the predetermined stirring time t2 has elapsed, the control means 22 stops the operation of the rotary drum 1, operates the drain pump 10 to discharge the rinse water out of the washing machine body 7, and completes the first rinsing process.

  Next, the process proceeds to the second rinsing step. FIG. 4 shows the second rinsing step, and in the same way as the first rinsing step, the steps of intermediate dehydration, water supply stirring, stirring after completion of water supply with a predetermined amount of water, and draining are sequentially executed.

  Balance control is performed at the beginning of the intermediate dehydration process. This balance control operation is performed using a general vibration detection sensor (not shown) or the like in order to reduce vibration when the rotary drum 1 is rotated at a high speed, and the rotation speed is, for example, about 50 r / min. After the balance control operation is completed, the control means 22 controls the motor 5 by gradually increasing the number of revolutions of the motor 5, and increases the number of revolutions of the rotary drum 1 to dehydrate the washing water from the laundry.

  In the intermediate dehydration step, the rotational speed of the rotary drum 1 after the balance control is completed is increased to a set maximum rotational speed, for example, 800 r / min, and is rotated at the maximum rotational speed for a predetermined time t3, and then the rotational speed is decreased. 0r / min. The maximum rotational speed is set lower than the rotational speed 900 r / min in the final dehydration process, and the predetermined time t3 is shorter than the predetermined time t1 in the first rinsing process.

  As a specific operation, the control means 22 starts to rotate the rotating drum 1 via the power switching means 15 and starts balance control at a rotational speed of about 50 r / min. When the balance control is completed, the rotating drum 1 is in a washing mode in which the number of rotations is increased and the clothes are not dried. Therefore, the number of rotations becomes 800 r / min, which is lower than the maximum number of rotations 900 r / min for final dehydration. Run for t3 hours at / min. After the elapse of t3 time, the control means 22 stops the rotating drum 1 via the power switching means 15.

  After completion of the intermediate dehydration, the laundry is stuck to the inner peripheral wall surface of the rotary drum 1. The control means 22 opens the water supply valve 11 and accumulates rinsing water in the water receiving tub 3, and performs a stirring operation by rotating the rotating drum 1 via the power switching means 15, and the laundry stuck to the rotating drum 1. Is removed from the rotating drum 1 and the laundry in the rinse water collected in the water receiving tub 3 is stirred to perform rinsing.

When the rinse water accumulates in the water receiving tank 3 and the water level detection means 12 detects the water level N3, the control means 22 stops the water supply and starts measuring the stirring time t4 after the completion of the predetermined water supply of the rotary drum 1. The stirring time t4 is longer than the rotation time t3 at the maximum rotation speed of intermediate dewatering. When the stirring time t4 has elapsed, the control means 22 stops the operation of the rotary drum 1. The stirring time t4 is generally 5 minutes or less because the effect of rinsing decreases as the stirring time t4 becomes longer and the stirring time t4 becomes longer. Thereafter, the control means 22 operates the drainage pump 10 to discharge the rinsing water out of the washing machine body 7 and completes the second rinsing process.

  When the number of times of rinsing is set to 3 times or more, the process proceeds to the third rinsing process. In the third rinsing step, intermediate dehydration is not performed, and the steps of water supply agitation, agitation after completion of the predetermined amount of water supply, and drainage are sequentially performed. The reason for not performing the intermediate dehydration is that the detergent concentration remaining in the laundry is reduced in the first and second rinsing steps.

  Following the predetermined number of rinsing steps, a final dewatering step is performed. The maximum rotation speed of final dehydration is, for example, 900 r / min. When the final dehydration for a predetermined time is completed, the washing process is completed in the washing mode in which the drying operation is not performed, and the control unit 22 turns off the power of the washing machine body 7.

  In the case of the washing mode in which the drying operation is performed following the washing process, warm air is supplied into the rotating drum 1 by a drying device (not shown) provided in the washing machine body 7, and the clothes in the rotating drum 1 are The drying process is completed, and the control means 22 turns off the power of the washing machine body 7.

  In the intermediate dehydration in the first rinsing step and the second rinsing step, the amount of drainage shows a saturation curve with respect to the elapsed time, and the amount of drainage decreases as the intermediate dehydration time elapses. Further, the detergent concentration of the drainage tends to decrease as the rotational speed of the rotary drum 1 increases, and even if the intermediate dehydration is performed for a long time, the effect of removing the detergent from the laundry is not so great.

  On the other hand, in the stirring after the completion of the predetermined water supply, the water receiving tank 3 is stirred in the state where the amount of water used for rinsing is the largest, so the length of this time greatly affects the rinsing effect. Therefore, by setting the stirring times t2 and t4 after completion of the predetermined water supply with a good rinsing performance longer than the holding times t1 and t3 at the maximum rotation speed of intermediate dewatering, the detergent remaining in the laundry is Rather than squeezing and removing by intermediate dehydration over time, it is easier to get out of the laundry by stirring together with the supplied rinse water, including moisture remaining in the laundry, so efficient rinsing It is possible to enhance the rinsing effect.

  Further, the amount of moisture retained in the laundry after completion of the intermediate dehydration is increased, and the cloth pain of the laundry due to dehydration can be reduced. Further, since the amount of water remaining in the laundry is increased, the amount of water supplied for rinsing after intermediate dehydration can be reduced by using this water. Further, the rinse performance can be further improved by adding rinse water as usual and increasing the rinse water.

  Further, when the washing time is made equal to the conventional amount due to the limitation of the washing time, the stirring time t2, t4 after completion of the predetermined water supply is longer than the holding time t1, t3 at the maximum rotation speed of intermediate dehydration, And since the power consumption amount at the time of driving | running | working with the maximum rotation speed in intermediate | middle dehydration is larger than the power consumption amount at the time of stirring after completion of water supply of predetermined water quantity, a power consumption amount can be reduced at a rinse process.

  By setting the stirring time t4 after completion of the predetermined water supply in the second rinsing step to be longer than the holding time t3 at the maximum rotation speed of the intermediate dehydration, the dirt component remaining in the first rinsing step is sufficient for the rinsing water. It can be washed out and is effective when the laundry is very dirty.

In addition, the rinsing effect can be improved by setting the stirring time t4 after completion of the predetermined water supply in the second rinsing process to be longer than the stirring time t2 after completion of the predetermined water supply in the first rinsing process.

  In the washing mode in which the clothes are dried, the maximum number of intermediate dehydrations in the rinsing process is set to the same number of revolutions as in the washing mode in which the clothes are not dried, and a predetermined amount of water is supplied in the rinsing process. Since the subsequent stirring time is longer than the holding time at the maximum rotation speed of the intermediate dehydration, the same effect as in the washing mode in which the clothes are not dried is obtained.

  In the present embodiment, the washing water in the rotary drum is circulated and is not sprayed on the clothing. However, in the rinsing step, the rinsing water may be sprayed on the clothing, thereby enhancing the rinsing effect. it can.

  As described above, the drum type washing machine according to the present invention can improve the rinsing performance of the laundry, and can reduce the cloth pain of the laundry due to the intermediate dehydration, and thus is useful as a drum type washing machine. It is.

1 Rotating drum 3 Water receiving tank 5 Motor 10 Drain pump (drainage means)
11 Water supply valve (water supply means)
12 Water level detection means 22 Control means

Claims (5)

A rotating drum rotatably disposed in the water receiving tank, a motor for driving the rotating drum, a water supply means for supplying water into the water receiving tank, and a draining means for draining the washing water in the water receiving tank. Control means for controlling the driving of the motor and sequentially controlling the washing process, the rinsing process, and the dewatering process, and the control means determines the maximum rotation speed of the intermediate dehydration in the rinsing process as the rotation speed of the balance control. A drum type washing machine that is higher and lower than the rotation speed of the final dewatering step, and the stirring time after completion of water supply of a predetermined amount in the rinsing step is longer than the holding time at the maximum rotation speed of the intermediate dewatering. A drying device for drying clothes is provided, and the control means has a maximum rotation speed of intermediate dehydration in the rinsing process in the washing mode in which the drying operation is performed, and a maximum rotation speed of intermediate dehydration in the washing mode in which the clothes are not dried. The drum type washing machine according to claim 1, wherein the number of revolutions is set to be equal to the number of rotations. The drum-type washing machine according to claim 1 or 2, wherein the control means executes the rinsing process twice, and the intermediate dewatering time of the second rinsing process is shorter than the intermediate dewatering time of the first rinsing process. The drum according to claim 1 or 2, wherein the control means executes the rinsing step twice, and the stirring time after completion of water supply of the predetermined amount in the second rinsing step is longer than the holding time at the maximum rotation speed of intermediate dewatering. Type washing machine. The drum type washing machine according to any one of claims 1 to 4, wherein a rotating shaft of the rotating drum is inclined forward and upward.