JP2012205625A - Drum-type washing machine - Google Patents

Abstract

To provide a drum type washing machine capable of improving the rinsing performance while shortening the washing time.
SOLUTION: A washing tub 4, a water tub 3 for storing the washing tub 4, a driving means 6 for rotationally driving the washing tub 4, a water supply means 7b for supplying water into the water tub 3, and a drainage means for discharging water from the water tub 3. 8b, and drive means 6, water supply means 7b, drainage means 8b, and a control means 11a for controlling each step of washing. After the rinsing operation, the washing tub 4 starts rotating in a certain direction. Since drainage is started and the laundry tub 4 rotates before draining by rotating at a rotational speed at which the laundry sticks to the laundry tub 4 during drainage, the effect of water absorption by the immersion of washing water and the effect of dehydration by centrifugal force at the same time Can be obtained and the rinsing performance can be improved.
[Selection] Figure 3

Description

  The present invention relates to a drum-type washing machine that puts laundry into a washing tub and performs washing by sequentially controlling each process such as washing, rinsing, and dehydration.

  In the conventional drum type washing machine, when the dehydration is performed, the rotation of the washing tub is stopped, the washing water is drained from the water tub, and then the process proceeds to the next process such as the rinsing process or the dehydration process and dehydrated. However, if the dehydration operation is performed after the washing tub is stopped and the drainage is completed, the operation time becomes longer. For this reason, by rotating the washing tub during drainage, the start-up of the dehydration process is accelerated and the washing time is shortened (for example, see Patent Document 1).

  In Patent Document 1, stirring in the washing process is started, and when the stirring operation for a predetermined time is finished, the drainage operation is started. Turn off the drum drive motor, turn on the drain pump and drain. Based on an input signal from the state detection circuit, it is detected whether various states have reached the drum driving conditions. The driving condition is that the water level in the water tank drops to a predetermined water level, or that a predetermined time elapses from the start of drainage. In addition, the drum is stopped by the detection of the driving condition at the latest. When it is detected that the drive condition has been reached, the drum drive motor is turned on so that the stopped drum rotates at a low speed in the reverse direction, and the dehydration process is started early.

JP 2004-16399 A

  However, in the conventional configuration, the washing tub has not been rotated from the start of drainage until the driving condition is reached. Thus, since the drum starts rotating after reaching the driving condition, the washing time can be shortened, but the rinsing performance is insufficient.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a drum type washing machine capable of improving the rinsing performance while shortening the washing time.

  In order to solve the above problems, a drum-type washing machine of the present invention includes a washing tub, a water tub that houses the washing tub, a driving unit that rotationally drives the washing tub, a water supply unit that supplies water into the water tub, A draining means for draining from the inside of the water tank; and a driving means, the water supply means, and a control means for driving the draining means to control each step of washing, the control means after the rinsing operation, the washing tub Starts rotating in a certain direction, and then starts draining, and the laundry rotates at a rotational speed that sticks to the washing tub during draining.

  With such a configuration, the washing tub starts to rotate before draining, and the laundry sticks to the washing tub at least during draining, so that it is possible to obtain the effects of water absorption by washing water immersion and dehydration by centrifugal force at the same time. .

  According to the drum type washing machine of the present invention, it is possible to improve the rinsing performance while shortening the washing time.

Sectional drawing which shows schematic structure 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 and dewatering process of the drum type washing machine Time chart showing the operations of the rinsing process and the dehydrating process of the drum type washing machine in Embodiment 2 of the present invention

  A drum-type washing machine according to a first aspect of the present invention includes a washing tub, a water tub that houses the washing tub, a drive unit that rotationally drives the washing tub, a water supply unit that supplies water into the water tub, and drains water from the water tub. Draining means, and the driving means, the water supply means, and the control means for driving the draining means to control each step of washing, and the control means rotates the washing tub in a certain direction after the rinsing operation. Then, drainage is started, and the laundry is rotated at a rotational speed at which it sticks to the washing tub during drainage. With such a configuration, since the washing tub rotates in a certain direction even before the start of drainage, the detergent component in the laundry is rinse water present around the laundry due to the movement of the laundry in the washing tub. To improve the rinsing performance. Moreover, since the washing tub is rotating in a certain direction at the end of drainage, the transition to the dehydration operation, which is the next process, can be performed smoothly.

  Further, as the drainage process proceeds and the water level of the water tub decreases, the rotation speed of the washing tub can be increased, and the laundry gradually sticks to the inner peripheral wall of the laundry tub. The detergent component contained in the laundry is removed from the laundry by centrifugal force due to an increase in the rotation speed of the laundry tub. After dehydration by centrifugal force, the dehydrated water can be replenished by absorbing water again from the rinse water. Thus, the rinse performance can be improved by efficiently removing the detergent components in the laundry by repeating water absorption and dehydration.

  Further, since dehydration is performed while absorbing water, it is not necessary to repeat the water supply and drainage, and the total water absorption amount of the laundry can be increased without increasing the water supply amount, so that water saving can be improved. Further, since the water is dehydrated while retaining a certain amount of water, the centrifugal force can be maintained, and the effective removal of the detergent component, that is, the rinsing performance can be improved.

  According to a second aspect of the invention, the drum-type washing machine according to the first aspect of the invention is a circulation water channel that discharges water in the water tub into the washing tub, and a circulation that sucks water in the water tub and sends the water to the circulation water channel. And the control means starts driving the circulation pump while the washing tub is rotating. With such a configuration, the amount of water absorbed by the laundry is increased by the water discharged from the circulation channel, and then the dehydration is performed by rotating the washing tub. Therefore, the replacement of the rinsing water for the laundry is further promoted, and the rinsing performance is improved. Can be planned.

  In addition, since the discharged water is dehydrated while absorbing water, it is not necessary to repeat the water supply and drainage, and the total water absorption amount of the laundry can be increased without increasing the water supply amount, so that water saving can be improved. Further, since the water is dehydrated while retaining a certain amount of water, the centrifugal force can be maintained, and the effective removal of the detergent component, that is, the rinsing performance can be improved.

  Furthermore, by applying water discharged from the circulation channel while the washing tub is rotating, it acts on the deformation of the laundry due to the water absorption of the laundry, and it is possible to promote an improvement in the balance of the laundry attached to the laundry tub. Therefore, the balance when the rotation speed of the washing tub is increased can be improved.

According to a third aspect of the present invention, in the drum type washing machine of the second aspect, the start of driving of the circulation pump is before the start of drainage. With such a configuration, the total water absorption amount of the laundry increases without increasing the amount of water supply, and the amount of the detergent component dissolved out increases, so that water saving performance and rinsing performance can be improved at the same time.

  Furthermore, after the drainage starts, by applying the discharged water from the circulation channel to the laundry while the laundry tub is rotating, it affects the deformation of the laundry due to the water absorption of the laundry and improves the balance of the laundry attached to the laundry tub. In order to promote, the effect which can improve the balance at the time of the rotation speed increase of a washing tub is acquired.

  According to a fourth aspect of the present invention, the drum-type washing machine according to any one of the first to third aspects includes time measuring means for measuring time, and the control means is configured to use the circulation pump based on a signal from the time measuring means. Or / and controls the drainage means. With such a configuration, the operation control time can be fixed to some extent, and variations in the washing time from the start to the end of washing can be prevented. In addition, since the operation control can be defined by time, for example, by setting an appropriate program according to the amount of clothes and the quality of the laundry and reflecting it in the operation control, it can be easily controlled. An appropriate rinsing effect suitable for the laundry can be obtained.

  According to a fifth aspect of the present invention, the drum type washing machine according to any one of the first to third aspects further includes a rotational speed detection means for detecting the rotational speed of the washing tub, and the control means is the rotational speed detection means. After confirming that the predetermined number of revolutions has been reached, the drainage means and / or the circulation pump is controlled. With such a configuration, it is possible to ensure that the process proceeds to the next process after reaching a predetermined rotational speed, and thus the rinsing performance due to centrifugal force is not deteriorated.

  In a sixth aspect of the invention, in the drum type washing machine according to any one of the first to fifth aspects, the rotation axis of the washing tub is inclined downward from the front side toward the back side. With such a configuration, the contact with the laundry can be improved with a small amount of water, and the water saving performance and the rinsing performance can be improved at the same time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the following description is a specific example of this invention, Comprising: The content of description of a claim is not limited.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic structure of a drum type washing machine according to an embodiment of the present invention. The configuration will be described below with reference to FIG.

  A water tub 3 is housed in the drum-type washing machine main body 1 so as to be swingable. A rotating drum 4 serving as a washing tub is housed in the water tub 3 so as to be rotatable around a rotation shaft 4a. A rotating shaft 4 a of the rotating drum 4 is directly connected to a motor 6 that is a driving means attached to the outside of the back surface of the water tank 3, and the rotating drum 4 is driven to rotate by this motor 6.

  The rotating drum 4 is provided with a plurality of through holes 4e over the entire peripheral wall 4c so that water can be passed and vented through the water tank 3 and the rotating drum 4. The back wall 4d of the rotating drum 4 is formed with a plurality of back openings 4g along the circumferential direction, and these back openings 4g are arranged so as to face the air inlet 18 formed in the upper part on the back side of the water tank 3. Has been. A plurality of agitation protrusions 4 b are provided on the inner surface of the peripheral wall 4 c of the rotating drum 4, and the laundry in the rotating drum 4 is lifted by the rotation of the rotating drum 4. Although the through-hole 4e is provided over the entire peripheral wall of the rotary drum 4, it may be partially formed on the peripheral wall of the rotary drum 4. In short, the air permeability between the water tank 3 and the rotary drum 4 and the passage of air are sufficient. What is necessary is just to set so that wateriness can be ensured and it does not interfere with drying from washing.

The rotating shaft 4a of the rotating drum 4 is inclined so as to face downward from the front side toward the back side. Specifically, it is arranged so as to be inclined downward from the horizontal direction X by, for example, an angle θ = 20 ± 15 degrees. By tilting the rotary shaft 4a in this way, the opening 13 of the water tub 3 can be arranged on the upper side, and the washing in the rotary drum 4 can be performed through the opening 13 of the water tub 3 without taking a posture of bending greatly. Things can be taken out.

  Further, the water tank 3 is provided along the vicinity thereof with the same inclination as the rotating drum 4 in order to reduce the amount of water supply. By adopting such a configuration, compared with the case where the rotating shaft 4a is set in the horizontal direction, the water supplied into the water tank 3 is accumulated on the back side so that a deep water storage state can be obtained even with a small amount of water, and washing with less rinsing water is possible. The contact with the object can be improved, and the rinsing effect can be enhanced. Therefore, even if the water level is lowered during drainage, the laundry can be immersed in water for a longer time than when the rotary shaft 4a is horizontal, and the rinsing performance can be improved. If the amount of water supply is not taken into account, the rotating shaft 4a may be horizontal or the inclination angle θ may be less than 15 degrees.

  In addition, an opening that communicates with the inside of the rotating drum 4 through the opening 13 of the water tub 3 is provided on the front side of the drum-type washing machine body 1, and an opening / closing door 5 is provided in the opening so as to be freely opened and closed. The opening 13 of the aquarium 3 is provided with an annular sealing material 14 at the edge thereof, and the front side of the sealing material 14 comes into contact with the rear side of the open / close door 5 to be sealed, and the opening of the aquarium 3 swings up and down, right and left, and back and forth. Even if the seal moves, the sealing material 14 is deformed and is pressed against the back side of the open / close door 5 to maintain the sealing performance.

  A water supply unit 7 for supplying water into the water tank 3 is disposed in the upper part of the water tank 3, and includes a water supply valve 7b serving as a water supply means, a detergent storage portion 7a supplied by opening and closing of the water supply valve 7b, and a detergent storage portion 7a. It is comprised from the water supply path | route 7c which supplies a detergent to the water tank 3 with water supply. Note that the water supply unit 7 only needs to be able to supply water into the water tank 3 or the rotating drum 4, so it is not necessarily arranged at the top, and may be on the back side, side surface, and bottom side of the water tank 3.

  The drainage unit 8 for draining water from the water tank 3 has a drain pipe 8a having one end connected to the bottom of the water tank 3, and a drain valve 8b as a drain means, and the washing process is completed by opening and closing the drain valve 8b. Thereafter, the water in the water tank 3 can be drained through the drain pipe 8a when necessary, such as at the end of the rinsing process. Further, a drainage filter 8c that can be removed from the outside of the drum-type washing machine body 1 is disposed on the downstream side of the drainage pipe 8a to collect lint contained in the drainage. The drain means is not limited to the drain valve 8b as long as the water in the water tank 3 can be drained, and may be a drain pump.

  The drying means 9 includes a blower 9c, a blower path 9d, an introduction port 9e, a lead-out port 9f, a dehumidifying unit 9g, and a heating unit 9h. The blower 9c sucks air from the outlet 9f that discharges air from the water tank 3 and the rotating drum 4. The introduction port 9 e is provided on the back side of the water tank 3 and sends air sucked by the blower 9 c into the rotary drum 4. The humid air from the outlet 9f is dehumidified by the dehumidifying part 9g. The dehumidified air is heated by the heating unit 9h disposed on the downstream side of the dehumidifying unit 9g and becomes high-temperature air. The dehumidifying part 9g and the heating part 9h are arranged in a blower path 9d that connects the blower 9c and the inlet 9e. The dehumidifying unit 9g and the heating unit 9h may be configured by a heat pump unit, the heating unit 9g may be configured by a heater, and the dehumidifying unit may be a water-cooled or air-cooled dehumidifying unit.

The drum type washing machine of the present invention includes a circulation water channel 31 that discharges water in the water tank 3 into the rotating drum 4 and a circulation pump 30 that sucks water in the water tank 3 and supplies the water to the circulation water channel 31. By driving the circulation pump, the water in the water tank 3 can be circulated as needed during the cleaning preparation process, the cleaning process, the rinsing process, etc., to prevent premature dissolution and bias of the detergent, and to improve the functions of washing and rinsing Can be planned. As shown in FIG. 1, the circulation pump 30 is fixed on a base plate 1 a that is the bottom of the drum-type washing machine body 1, sucks the washing liquid and the rinsing water in the water tank 3, and sends them to the circulation water channel 31. . Further, the supplied washing liquid and rinsing water discharge the washing liquid accumulated in the water tank 3 through the circulation water channel 31 from the opening 15 of the rotating drum 4 into the washing tank. In detail, the discharge side path 31b of the circulating water channel 31 is connected from the outer surface to the injection port 51 provided in the front end wall 3f around the opening 13 of the water tank 3, and the water tank 3 The washing liquid is sprayed between the back surface of the front end wall 3f and the front surface wall 4f of the front end wall 4f corresponding to the front end wall 3f, and is discharged into the rotary drum 4 through a flow path formed therebetween. As a result, the water injection port 51 from the discharge side passage 31b is in a position where it does not come into contact with the laundry in the rotating drum 4, so that the laundry is caught and disturbs the behavior required for washing, rinsing, drying, etc., or It is possible to prevent the laundry from being damaged or torn, and the appearance is not impaired. The injection port 51 is not limited to the lower position, and may be arranged in any position as long as it does not contact the laundry in the rotating drum 4.

  Further, when the washing liquid is simply sprayed into the rotating drum 4, the circulating water can be sprayed only to the local portion of the laundry in the rotating drum 4, and the circulation effect cannot be fully utilized. On the other hand, if a special injection nozzle is used to inject the circulating water over a wide area, the required pump pressure will increase and there will be a cost increase. Therefore, in the first embodiment, in order to circulate the water in the water tank 3 by the circulation pump 30, the flow rate and flow rate of the circulating water to be discharged are adjusted using, for example, a DC brushless motor capable of controlling the rotation speed. By doing so, it is possible to change the angle in the vertical direction and the degree of spread in the horizontal direction of the circulating water to be discharged without adopting a special injection nozzle. As a result, the circulating pump 30 can supply the circulating water evenly and optimally to the laundry in the water tub 3, and can improve the washing performance and the rinsing performance. Moreover, since it is possible to avoid unnecessary supply of circulating water to the space where the laundry is not located, it is possible to suppress useless power consumption and to suppress abnormal foaming due to the detergent water.

  In the first embodiment, the rotational speed of the circulation pump 30 is controlled only by the ON / OFF control, and the rotational speed is not changed. However, the rotational speed may be changed according to each operation process and the amount of laundry.

  During normal washing operation, for example, about 3500 r / min, and about 20 L / min of circulating water is supplied to the laundry in the water tank 3 to improve washing performance and rinsing performance. At this time, water discharged from the injection port 51 is as indicated by an arrow A in FIG. On the other hand, when it is determined by the load amount detection means that the amount of laundry is less than the predetermined value, the rotational speed of the circulation pump 30 is reduced to, for example, about 2500 r / min, and the supplied circulating water is set to about 15 L / min. . At this time, the water discharged from the injection port 51 is as shown by an arrow B in FIG. 1, and the discharged vertical angle is made closer to the horizontal, and the extent of the horizontal spread is reduced. Thereby, when there are few laundry, the state where the discharged circulating water does not hit the laundry located in the downward direction in the water tank 3 can be avoided, and circulating water can be supplied efficiently.

  In the first embodiment, the circulation pump 30 is installed on the base plate 1a, which is the bottom of the drum-type washing machine body 1. However, the present invention is not limited to this, and the water in the water tank 3 is used. In order to circulate, the structure which installs the circulation pump 30 in the lower part 3b of the water tank 3 may be sufficient. Moreover, the discharge side path | route 31b is not restricted to one, There may be multiple, and the injection port 51 may be not only from the lower part but from the upper part, and may be plural.

  Further, the drum type washing machine according to the first embodiment of the present invention is provided with a cloth amount detecting means for detecting the amount of laundry put into the rotating drum 4. Hereinafter, an example of the cloth amount detection means will be described.

The cloth amount detection is performed as follows. First, the motor 6 is rotationally driven. At this time, the rotational speed of the rotating drum 4 is temporarily raised to a rotational speed at which the laundry sticks to the inside of the peripheral wall 4c of the rotating drum 4, for example, about 100 to 140 r / min. After maintaining the rotation for a predetermined time, the motor 6 is turned off. Thereby, the inertial rotation of the rotating drum 4 is in a state where the motor 6 is rotated. At this time, the inertial rotational force of the rotating drum 4 gradually decreases due to the friction torque, and the rotating drum 4 stops eventually. The time from the stop of energization to the stop of the rotating drum 4 is long when the amount of laundry is large, and short when the amount of laundry is small. The amount of laundry is detected using the fact that the difference in time required for this stop is proportional to the amount of laundry.

  Further, the drum type washing machine according to the present embodiment is provided with a water level detection means 10 for detecting the amount of water supplied into the rotary drum 4. In this configuration, an air trap 10a and a pressure detector (not shown) disposed at a predetermined position near the bottom of the rotary drum 4 are connected to a hose 10b. The pressure detector is composed of a ferrite integrated with the bellows part that moves by pressure and a fixed coil that surrounds the outer periphery of the ferrite, and converts the moving stroke distance into the trap internal pressure using the change in inductance. . The water level detection means 10 is in an open state when the washing liquid does not come into the air trap part, and the output is constant. In the case of a water level below this detection lower limit water level, the amount of water and the presence or absence of water cannot be detected.

  As described above, the water level detection means 10 is generally sensing by air internal pressure measurement by an air trap mechanism, and measuring the time until the air internal pressure changes from the stable atmospheric open pressure affects the variation of the water level sensor. It is an appropriate calculation method that is not subject to

  The output of the water level detection means 10 changes depending on the rotation speed of the rotary drum 4 because the output changes depending on the rotation of the rotary drum 4 during the washing operation, such as whether or not the rotary drum 4 is rotating. Have multiple tables. That is, the water level can be recognized while the rotating drum 4 is stationary or rotating.

  Next, details of the control unit 11 will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the control unit 11 of the drum type washing machine in Embodiment 1 of the present invention.

  The control unit 11 includes a control unit 11a that is a control unit, an input setting unit 11b, a display unit 11c, a storage unit 11e, and a time measurement unit 11f that is a time measurement unit. The control unit 11a is constituted by a microcomputer, and drives the motor 6, the drain valve 8b, the circulation pump 30, the water supply valve 7b, etc. via the power switching means 11d, and performs a series of washing steps such as washing, rinsing and dehydration. Control sequentially.

The input setting unit 11b sets a driving course and the like, and the control unit 11a inputs information from the input setting unit 11b and displays the display unit 11c based on the information to notify the user. The storage unit 11e stores data necessary for control by the control unit 11a.
Since the control unit 11a includes a time measurement unit 11f that measures time, the control unit 11a includes various sensor outputs such as the water level detection means 10 as well as an instruction for driving the water supply / drainage and the rotating drum 4 based on a signal from the time measurement unit 11f. All input / output control can be managed by time, and the time required for each operation and timing can be known.

  Also, information from the input setting unit 11b is input, and the information is notified to the user by the display unit 11c. The storage unit 11e stores data necessary for the control unit 11a to control.

  The rotation speed detection means 21 detects the rotation speed of the rotary drum 4. Information of the rotational speed detection means 21 is sent to the control section 11a, and the control section 11a controls the rotational speed of the rotary drum 4 via the power switching means 11d and the power switching means 11d.

About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. The drum type washing machine in Embodiment 1 of the present invention has a function of performing at least a cleaning process, a rinsing process, a dehydrating process, and a drying process in accordance with mode setting and a control program. However, in the present invention, since the presence or absence of the drying function is not relevant, the drying step can be omitted.

  In the following description, the operation of dewatering while draining is called drainage dewatering. In order to distinguish between the drainage dewatering during the rinsing process and the drainage dewatering during the dewatering process, the drainage dewatering during the rinsing process is called intermediate drainage dewatering, and the drainage dewatering during the dewatering process is called final drainage dewatering.

  First, when the laundry is put in from the opening / closing door 5 and the operation is started, the cloth amount is detected as the rotating drum 4 rotates. Then, the water supply valve 7b is opened and water supply is started. The detergent in the detergent container is also put into the water tank 3 using water supply. When the water level in the water tank 3 exceeds a predetermined level, the circulation pump 30 is operated to accelerate the dissolution of the detergent. The control unit 11a controls the motor 6 that is a driving unit of the water tank 3 to drive the rotary drum 4 to rotate. The laundry in the rotating drum 4 is caught by the stirring protrusion 4b and lifted in the rotational direction, and falls from the appropriate height onto the water surface of the washing liquid in which the detergent is dissolved. Such a stirring operation is repeated, and dirt is removed by penetration and discharge of the detergent into the laundry. After the required washing time, the drain valve 8b is opened, the dirty washing liquid is discharged from the drain pipe 8a, and the washing process ends.

  Thereafter, the first rinsing step is entered. FIG. 3 is a time chart showing the operations of the rinsing process and the dewatering process of the drum type washing machine in the first embodiment of the present invention. The first rinsing step is performed in the order of intermediate dehydration and feed water stirring.

  First, in the intermediate dehydration process, the balance control operation of the laundry in the rotating drum 4 is started. The balance control operation is performed using a general vibration detection sensor (not shown) or the like in order to reduce vibration when the rotating drum 4 is rotated at high speed.

  After the balance control operation is completed, the control unit 11a controls to gradually increase the rotation speed of the motor 6. The rotational speed of the rotating drum 4 is increased to a high rotational speed of, for example, about 900 r / min, and the washing liquid is dehydrated from the laundry.

  When the rotation time t1 at the high rotation speed in the first rinsing process has elapsed, the motor 6 is stopped. When the rotational speed of the rotating drum 4 reaches 0 r / min, the intermediate dehydration process is completed. At this time, the laundry is stuck to the inner peripheral wall of the rotating drum 4.

  When entering the water supply stirring process in which the rinsing operation is performed, the control unit 11 a opens the water supply valve 7 b while rotating the rotating drum 4 in a certain direction, and stores water in the water tank 3. The rotational speed of the rotating drum 4 at this time is such that the laundry sticks to the inner peripheral wall of the rotating drum 4 and is, for example, about 80 r / min.

  When the rinse water is stored in the water tank 3 and the water level detection means 10 detects the water level h1, the controller 11a stops water supply. At the same time, the circulation pump 30 is turned on, and discharged water is applied to the laundry. At this time, the rotational speed of the rotating drum 4 is increased to, for example, about 170 r / min to remove lint. The control unit 11a measures the time from when the rotation number of the rotary drum 4 starts to be increased or the time after the rotation number starts to increase by the time measurement unit 11f. When the time T elapses, the number of revolutions is reduced, the operation is switched to a stirring operation called tumbling, water supply is restarted, and the operation of the circulation pump 30 is stopped. The tumbling is to rotate the rotating drum 4 at such a speed that the tumbling is lifted to the vicinity of the top of the rotating drum 4 and then falls due to its own weight. The rotation direction may be forward / reverse rotation or a fixed direction. The laundry is peeled off from the peripheral wall 4c of the rotary drum 4 by tumbling, and the laundry is stirred in the rinse water stored in the water tub 3 to be rinsed.

  When the rinsing water accumulates in the water tank 3 and the water level detection means 10 detects the water level h2, the control unit 11a sends a signal to the water supply valve 7b to stop the water supply. When time t <b> 2 has elapsed since the water supply was stopped, the control unit 11 a stops the tumbling operation of the rotating drum 4 and the operation of the circulation pump 30. The time t2 from when the water supply is stopped in order to provide sufficient rinsing performance is set longer than the rotation time t1 at the high rotation speed in the first rinsing process.

  When the time t2 after the stop of the water supply has elapsed, the water supply stirring step ends, that is, the first rinsing step ends.

  When entering the second rinsing step, the intermediate drainage dehydration step is started. In the intermediate drainage dewatering step, first, the rotating drum 4 starts rotating in a certain direction. The rotation direction at this time may be the same as or opposite to the rotation direction of the feed water stirring step.

  The rotation speed of the rotating drum 4 is, for example, 80 r / min, and is constantly rotated at a predetermined rotation speed at which the laundry is stuck to the rotating drum in a draining state. At this time, the rotation speed of the rotating drum 4 is preferably a rotation speed at which the laundry is stuck to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min. Further, the rotational speed of the rotary drum 4 does not have to be constant, and may be increased in a plurality of stages or in a linear function up to a predetermined rotational speed.

  The circulation pump 30 starts to be driven before the drainage of the water in the water tank 3 is started while the rotary drum 4 is rotating. In detail, the control part 11a controls the circulation pump 30 and the drain valve 8b based on the signal by the time measurement part 11f as follows.

  When the time measurement unit 11f confirms that the time t3 has elapsed since the rotation drum 4 started rotating in a certain direction, the control unit 11a sends a signal to the circulation pump 30 to start driving the circulation pump 30. By driving the circulation pump 30, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51, and the rinsing water starts to be applied to the laundry, thereby further promoting the replacement of the rinsing water with respect to the laundry. By replacing the rinse water, the detergent components in the laundry are dissolved in the rinse water existing around the laundry and become less.

  When the time measurement unit 11f confirms that the time t4 has elapsed since the rotation drum 4 started rotating in a certain direction, the control unit 11a sends a signal to the drain valve 8b, and the rinse water accumulated in the water tank 3 Start draining. At this time, the water level of the rinse water gradually decreases due to the drainage. The controller 11a gradually increases the rotational speed of the rotating drum 4 based on a signal from the water level detecting means 10, and the laundry in the rotating drum 4 rotates while sticking to the inner peripheral wall of the rotating drum 4.

  The number of rotations of the rotating drum 4 increases until a high speed number of rotation of about 500 r / min, for example. The high-speed rotation speed in the intermediate drainage dewatering step is set to be lower than the high-speed rotation speed at the time of intermediate dewatering. This is because the water in the laundry never drains, so that the centrifugal force is not reduced and the rinsing performance can be maintained.

  At this time, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51 by the circulation pump 30, and the rinsing water is applied to the laundry. In this state, the laundry absorbs water by contact with the remaining rinse water and the discharged water. Furthermore, dehydration is also performed by the centrifugal force generated by the rotation of the rotating drum 4, and the laundry repeatedly absorbs and dehydrates rinse water. As a result, the detergent components remaining in the laundry can be efficiently removed.

  Thereafter, when the drainage proceeds and the water level detection means 10 detects the predetermined water level h3, the control unit 11a stops the circulation pump 30. The predetermined water level h3 is a water level that prevents the circulation pump 30 from seeing air.

  When the time measuring unit 11f confirms that the time t5 has elapsed since the rotating drum 4 started high-speed rotation in the intermediate drainage dewatering step, the control unit 11a stops the operation of the rotating drum 4. When the rotational speed of the rotating drum 4 reaches 0 r / min, the intermediate drainage dewatering step is completed.

  Thereafter, the feed water stirring step in the second rinsing step is entered. The controller 11a opens the water supply valve 7b, accumulates rinsing water in the water tank 3, and starts a stirring operation of the rotating drum 4 called tumbling. The tumbling is to rotate the rotating drum 4 at such a speed that the tumbling is lifted to the vicinity of the top of the rotating drum 4 and then falls due to its own weight. The rotation direction may be forward / reverse rotation or a fixed direction. The laundry is peeled off from the inner peripheral wall of the rotating drum 4 by tumbling, and the laundry is stirred in the rinse water stored in the water tank 3 to perform rinsing. The laundry stuck to the rotating drum 4 is peeled off from the rotating drum 4, and the laundry in the rinsing water accumulated in the water tank 3 is agitated and rinsed.

  When the rinse water is accumulated in the water tank 3 and the water level detection means 10 detects the water level h4, the controller 11a stops the water supply and starts the operation of the circulation pump 30.

  When it is confirmed that the time t6 has elapsed since the time measuring unit 11f stopped supplying water, the operation of the rotary drum 4 and the circulation pump 30 is stopped. At this time, the feed water stirring step in the second rinsing step ends, that is, the second rinsing step ends.

  When entering the final dewatering process, that is, the final drainage dewatering process, the controller 11a starts rotating the rotating drum 4 in a certain direction. The rotational speed of the rotating drum 4 is, for example, 80 r / min, and is constantly rotated at a predetermined rotational speed at which the laundry sticks to the rotating drum when drainage starts. At this time, the rotation speed of the rotating drum 4 is preferably a rotation speed at which the laundry is stuck to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min. Further, the rotational speed of the rotary drum 4 does not have to be constant, and may be increased in a plurality of stages or in a linear function up to a predetermined rotational speed. The rotation in a certain direction may be the same as or opposite to the rotation direction of the intermediate drainage dewatering process.

  Here, the driving of the circulation pump 30 is started before the drainage is started while the rotary drum 4 is rotating. Specifically, when the time measurement unit 11f confirms that the time t7 has elapsed since the rotation drum 4 started rotating in a certain direction, the control unit 11a sends a signal to the circulation pump 30 and starts driving the circulation pump 30. To do. Rinsing water that has passed through the circulation channel 31 is discharged from the injection port 51 and begins to apply rinsing water to the laundry, further promoting the replacement of the rinsing water with respect to the laundry. By replacing the rinse water, the detergent components in the laundry are dissolved in the rinse water existing around the laundry and become less.

  The laundry component in the laundry is dissolved in the rinsing water existing around the laundry by the movement of the laundry in the rotary drum 4 due to the rotation of the rotary drum 4 in a certain direction. Since the amount of the detergent component remaining in the resin is reduced, the rinsing performance is improved.

  At this time, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51 by the circulation pump 30, and the rinsing water is applied to the laundry. In this state, the laundry absorbs the water by the contact with the remaining rinse water and the discharged water, but the dehydration is also performed by the centrifugal force by the rotation of the rotating drum 4, and the laundry is rinsed. By repeating water absorption and dehydration, the detergent components remaining in the laundry can be efficiently removed.

At this time, since the water discharged from the circulation channel 31 can be applied to the laundry until the water level of the rinse water falls to the predetermined water level, the water absorption amount of the laundry is increased without increasing the water supply amount, The amount of detergent components remaining in the product can be reduced.

  The activation of the circulation pump 30 is defined by the time by the time measuring unit 11f. However, the operation may be controlled after reaching a predetermined rotational speed. The predetermined rotational speed is preferably a rotational speed at which the laundry sticks to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min.

  When the time measuring unit 11f confirms that the time t8 has elapsed since the rotating drum 4 started rotating in a certain direction, the control unit 11a sends a signal to the drain valve 8b, and the rinse water stored in the water tank 3 is stored. Start draining.

  As the drainage proceeds and the water level in the water tank 3 decreases, the laundry gradually sticks to the inner peripheral wall of the rotating drum 4. The laundry comes into contact with the rinse water remaining in the rotary drum 4 by rotation, and further, the rinse water is absorbed by applying the discharge water from the circulation water channel 31 to the laundry, and the detergent component from the laundry is rinse water. Melt out. Since the rotational speed of the rotating drum 4 increases as the water level of the aquarium 3 decreases, water with a large amount of detergent component contained in the laundry is removed from the laundry by centrifugal force due to the increased rotational speed of the rotating drum 4. Further, the rinsing performance can be further improved.

  Furthermore, by applying the discharge water from the circulation water channel 31 to the laundry while the rotary drum 4 is rotating, it acts on the deformation of the laundry and can promote the improvement of the balance of the laundry on the rotary drum 4. .

  Moreover, since the time for starting the drainage of the rinsing water can be set with reference to the time when the rotary drum 4 starts rotating in a certain direction, the time until the start of the drainage can be fixed. With such a configuration, stable drainage can be performed, and variation in washing time from the start of washing to the completion of dehydration can be prevented. In addition, since it is possible to set the time when the discharged water is started to be discharged from the circulating water channel 31 on the basis of the time when the rotating drum 4 starts rotating in a certain direction, an effect of further improving the rinsing performance can be obtained.

  Thereafter, when the water level detection means 10 detects the predetermined water level h5, the control unit 11a stops the circulation pump 30. The predetermined water level h5 is a water level that prevents the circulation pump 30 from seeing air.

  When the time measurement unit 11f confirms that the time t9 has elapsed since the high-speed rotation of the rotary drum 4 in the final drainage dewatering process has been completed, the control unit 11a stops the operation of the rotary drum 4. When the rotational speed of the rotating drum 4 reaches 0 r / min, the intermediate drainage dehydration process is completed, that is, the dehydration process is completed.

  In the first embodiment of the present invention, the rotational speed of the rotary drum is not particularly specified. In addition, regarding ON / OFF control of the circulation pump 30, it is always set to ON during the rinsing process after the circulation pump 30 is turned ON, but the ON period is not particularly specified, and ON / OFF control is necessary. Depending on

  In the first embodiment, the drum type washing machine is described as an example, but the same effect can be obtained in a vertical washing machine such as a pulsator stirring type or an agitator type. In the vertical washing machine, in order to uniformly permeate water, a configuration may be adopted in which the laundry is uniformly wetted from the outer peripheral side of the laundry using a shower or the like provided outside the washing tub. In addition, when rotating the washing tub during drainage, the laundry can be attached to the washing tub by moving the pulsator and the washing tub together.

(Embodiment 2)
The steps different from those of the first embodiment of the drum type washing machine of the second embodiment of the present invention are described with reference to the drawings. FIG. 4 is a time chart showing the operations of the rinsing process and the dewatering process of the drum type washing machine in the second embodiment of the present invention.

  When the second rinsing process is entered and the intermediate drainage dewatering process is started, the rotating drum 4 starts rotating in a certain direction. The rotation direction at this time may be the same as or opposite to the rotation direction of the feed water stirring step.

  The rotational speed of the rotating drum 4 is, for example, 80 r / min, and is constantly rotated at a predetermined rotational speed at which the laundry is stuck to the rotating drum in a state where drainage starts. At this time, the rotation speed of the rotating drum 4 is preferably a rotation speed at which the laundry is stuck to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min. Further, the rotational speed of the rotating drum 4 does not have to be constant, and may be increased in a plurality of steps or in a linear function up to a predetermined rotational speed.

  The circulation pump 30 starts to be driven before the drainage of the water in the water tank 3 is started while the rotary drum 4 is rotating. Specifically, as described below, the control unit 11 a controls the drain valve 8 b and the circulation pump 30 after confirming that the predetermined number of rotations has been reached by the rotation number detection means 21.

  First, when the rotation speed detection means 21 detects that the rotation speed of the rotary drum 4 has reached a predetermined rotation speed, the control unit 11a sends a signal to the circulation pump 30 to start driving. By driving the circulation pump 30, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51, and the rinsing water starts to be applied to the laundry, thereby further promoting the replacement of the rinsing water with respect to the laundry. By replacing the rinse water, the detergent components in the laundry are dissolved in the rinse water existing around the laundry and become less.

  When the time measuring unit 11f confirms that the time t13 has elapsed since the rotating drum 4 has reached the predetermined number of revolutions, the control unit 11a sends a signal to the drain valve 8b, and the rinse water accumulated in the water tank 3 is transmitted. Start draining. At this time, the water level of the rinse water gradually decreases due to the drainage. The controller 11a gradually increases the rotational speed of the rotating drum 4 based on a signal from the water level detecting means 10, and the laundry in the rotating drum 4 rotates while sticking to the inner peripheral wall of the rotating drum 4.

  The number of rotations of the rotating drum 4 increases until a high speed number of rotation of about 500 r / min, for example. The high-speed rotation speed in the intermediate drainage dewatering step is set to be lower than the high-speed rotation speed at the time of intermediate dewatering. This is because the water in the laundry never drains, so that the centrifugal force is not reduced and the rinsing performance can be maintained.

  At this time, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51 by the circulation pump 30, and the rinsing water is applied to the laundry. In this state, the laundry absorbs water by contact with the remaining rinse water and the discharged water. Furthermore, dehydration is also performed by the centrifugal force generated by the rotation of the rotating drum 4, and the laundry repeatedly absorbs and dehydrates rinse water. As a result, the detergent components remaining in the laundry can be efficiently removed.

  Thereafter, when the time measurement unit 11f confirms that the time t14 has elapsed since the start of drainage, the control unit 11a stops the circulation pump 30. The predetermined water level h3 is a water level that prevents the circulation pump 30 from seeing air.

  When the time measurement unit 11f confirms that the time t15 has elapsed since the water level in the water tank 3 became 0, the control unit 11a stops the operation of the rotating drum 4. When the rotational speed of the rotating drum 4 reaches 0 r / min, the intermediate drainage dewatering step is completed.

  Thereafter, the feed water stirring step in the second rinsing step is entered. The controller 11a opens the water supply valve 7b, accumulates rinsing water in the water tank 3, and starts a stirring operation of the rotating drum 4 called tumbling. The tumbling is to rotate the rotating drum 4 at such a speed that the tumbling is lifted to the vicinity of the top of the rotating drum 4 and then falls due to its own weight. The rotation direction may be forward / reverse rotation or a fixed direction. The laundry is peeled off from the inner peripheral wall of the rotating drum 4 by tumbling, and the laundry is stirred in the rinse water stored in the water tank 3 to perform rinsing. The laundry stuck to the rotating drum 4 is peeled off from the rotating drum 4, and the laundry in the rinsing water accumulated in the water tank 3 is agitated and rinsed.

  When the rinse water is accumulated in the water tank 3 and the water level detection means 10 detects the water level h14, the controller 11a stops the water supply.

  Further, when the time measurement unit 11f confirms that the time t16 has elapsed since the start of water supply, the control unit 11a sends a signal to the circulation pump 30 to start driving the circulation pump 30.

  When it is confirmed that the time t17 has elapsed since the time measurement unit 11f stopped water supply, the operation of the rotary drum 4 and the circulation pump 30 is stopped, and the water supply stirring step in the second rinsing step is completed, that is, the second time The rinsing process is completed.

  When entering the final dewatering step, the final drainage dewatering is started, and the control unit 11a starts the rotation of the rotating drum 4 in a certain direction. The rotational speed of the rotating drum 4 is, for example, 80 r / min, and is constantly rotated at a predetermined rotational speed at which the laundry sticks to the rotating drum when drainage starts. At this time, the rotation speed of the rotating drum 4 is preferably a rotation speed at which the laundry is stuck to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min. Further, the rotational speed of the rotary drum 4 does not have to be constant, and may be increased in a plurality of stages or in a linear function up to a predetermined rotational speed. The rotation in a certain direction may be the same as or opposite to the rotation direction of the intermediate drainage dewatering process.

  When the rotational speed detection means 21 detects that the rotational speed of the rotating drum 4 has reached a predetermined rotational speed, the controller 11a sends a signal to the circulation pump 30 to start driving. By driving the circulation pump 30, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51, and the rinsing water starts to be applied to the laundry, thereby further promoting the replacement of the rinsing water with respect to the laundry. By replacing the rinse water, the detergent components in the laundry are dissolved in the rinse water existing around the laundry and become less.

  The laundry component in the laundry is dissolved in the rinsing water existing around the laundry by the movement of the laundry in the rotary drum 4 due to the rotation of the rotary drum 4 in a certain direction. Since the amount of the detergent component remaining in the resin is reduced, the rinsing performance is improved.

  At this time, the rinsing water that has passed through the circulation water channel 31 is discharged from the injection port 51 by the circulation pump 30, and the rinsing water is applied to the laundry. In this state, the laundry absorbs the water by the contact with the remaining rinse water and the discharged water, but the dehydration is also performed by the centrifugal force by the rotation of the rotating drum 4, and the laundry is rinsed. By repeating water absorption and dehydration, the detergent components remaining in the laundry can be efficiently removed.

  At this time, since the water discharged from the circulation channel 31 can be applied to the laundry until the water level of the rinse water falls to the predetermined water level, the water absorption amount of the laundry is increased without increasing the water supply amount, The amount of detergent components remaining in the product can be reduced.

  The predetermined rotational speed is preferably a rotational speed at which the laundry sticks to the washing tub, such as 50 to 120 r / min, and more preferably 80 to 100 r / min.

  When the time measurement unit 11f confirms that the time t18 has elapsed since the rotation number of the rotary drum 4 has reached the predetermined rotation number, the control unit 11a sends a signal to the drain valve 8b and is stored in the water tank 3. Start draining rinse water.

  As the drainage proceeds and the water level in the water tank 3 decreases, the laundry gradually sticks to the inner peripheral wall of the rotating drum 4. The laundry comes into contact with the rinse water remaining in the rotary drum 4 by rotation, and further, the rinse water is absorbed by applying the discharge water from the circulation water channel 31 to the laundry, and the detergent component from the laundry is rinse water. Melt out. Since the rotational speed of the rotating drum 4 increases as the water level of the aquarium 3 decreases, water with a large amount of detergent component contained in the laundry is removed from the laundry by centrifugal force due to the increased rotational speed of the rotating drum 4. Further, the rinsing performance can be further improved.

  Furthermore, by applying the discharge water from the circulation water channel 31 to the laundry while the rotary drum 4 is rotating, it acts on the deformation of the laundry and can promote the improvement of the balance of the laundry on the rotary drum 4. .

  Thereafter, when the time measurement unit 11f confirms that the time t19 has elapsed since the start of drainage, the control unit 11a stops the circulation pump 30.

  When the time measuring unit 11f confirms that the time t20 has elapsed since the water level in the water tank 3 became zero, the control unit 11a stops the operation of the rotating drum 4. When the rotational speed of the rotating drum 4 reaches 0 r / min, final drainage dewatering is completed, that is, the dewatering process is completed.

  In the second embodiment of the present invention, the rotational speed of the rotary drum is not particularly specified. In addition, regarding ON / OFF control of the circulation pump 30, it is always set to ON during the rinsing process after the circulation pump 30 is turned ON, but the ON period is not particularly specified, and ON / OFF control is necessary. Depending on

  In the second embodiment, a drum type washing machine is described as an example, but the same effect can be obtained in a vertical washing machine such as a pulsator stirring type or an agitator type. In the vertical washing machine, in order to uniformly permeate water, a configuration may be adopted in which the laundry is uniformly wetted from the outer peripheral side of the laundry using a shower or the like provided outside the washing tub. In addition, when rotating the washing tub during drainage, the laundry can be attached to the washing tub by moving the pulsator and the washing tub together.

  The drum type washing machine according to the present invention repeats water absorption from the rinse water of the laundry at the time of drainage and dehydration by rotation of the washing tub, so that the detergent component in the laundry is melted and the rinse performance is improved. Therefore, it can be applied not only to a home-use washing machine but also to a washing apparatus for textiles and a commercial washing machine mainly composed of water washing.

DESCRIPTION OF SYMBOLS 1 Drum type washing machine main body 1a Base plate 3 Water tank 3f Front end wall 4 Rotating drum (washing tub)
4a Rotating shaft 4b Stirring protrusion 4c Peripheral wall 4d Rear wall 4e Through hole 4f Front end wall 4g Rear opening 5 Opening / closing door 6 Motor (drive means)
7 Water supply unit 7a Detergent container 7b Water supply valve (water supply means)
7c Water supply path 8 Drainage unit 8a Drain pipe 8b Drain valve (drainage means)
8c Drainage filter 9 Drying means 9c Blower 9d Blower path 9e Inlet 9f Outlet 9g Dehumidifying part 9h Heating part 10 Water level detecting means 10a Air trap part 10b Hose 11 Control unit 11a Control part (control means)
11b Input setting unit 11c Display unit 11d Power switching unit 11e Storage unit 11f Time measurement unit (time measurement unit)
DESCRIPTION OF SYMBOLS 13 Water tank opening 14 Sealing material 15 Washing tank opening 18 Air guide port 21 Rotational speed detection means 30 Circulation pump 31 Circulation water channel 31b Discharge side channel 51 Injection port

Claims (6)

A washing tub,
A water tank for storing the washing tub;
Driving means for rotating the washing tub;
Water supply means for supplying water into the water tank;
Drainage means for draining from the water tank;
Control means for driving the drive means, the water supply means, the drainage means, and controlling each step of washing,
After the rinsing operation, the control means starts draining after the washing tub starts rotating in a certain direction, and the laundry is rotated at a rotational speed at which the laundry sticks to the washing tub during draining. . A circulation channel for discharging water in the water tub into the washing tub;
A circulation pump that sucks water in the water tank and feeds the water to the circulation channel,
The drum type washing machine according to claim 1, wherein the control means starts driving the circulation pump while the washing tub is rotating. The drum type washing machine according to claim 2, wherein the start of driving of the circulation pump is before the start of drainage. The drum according to any one of claims 1 to 3, further comprising time measuring means for measuring time, wherein the control means controls the circulation pump and / or the drainage means based on a signal from the time measuring means. Type washing machine. It has rotation speed detection means for detecting the rotation speed of the washing tub, and the control means confirms that the predetermined rotation speed has been reached by the rotation speed detection means, and then the drainage means and / or the circulation The drum type washing machine according to any one of claims 1 to 3, wherein the pump is controlled. The drum type washing machine according to any one of claims 1 to 5, wherein the rotation axis of the washing tub is inclined downward from the front side toward the back side.