JP2012205628A - Drum-type washing machine - Google Patents

Abstract

A washing machine capable of improving the rinsing performance while shortening the washing time is provided.
After the rinsing operation, the control means 11a drives the circulation pump 30 to put water on the laundry, rotates the laundry tub 4 at a rotational speed higher than the rotational speed at which the laundry sticks to the laundry tub 4, and the rotational speed is 3 After reaching the next resonance rotational speed or more, the next process is started. Since the washing tub 4 rotates so that the laundry sticks while the circulating water is applied, the rinsing performance is improved, and the laundry is deformed by the absorbed circulating water, and the balance of the laundry sticking to the washing tub 4 is balanced. Is promoted, the occurrence of imbalance can be suppressed, the process for improving the balance can be shortened, and the washing time can be shortened.
[Selection] Figure 3

Description

  The present invention relates to a 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. 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 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, Draining means for draining from the water tank, a circulation water channel for discharging water in the water tank into the washing tub, a circulation pump for sucking water in the water tank and feeding it to the circulation water channel, and the driving means, The water supply means, the drainage means and the circulation pump are driven, and control means for controlling each step of washing, and the control means drives the circulation pump after the rinsing operation to apply water to the laundry, The laundry tub is rotated at a rotation speed equal to or higher than the number of rotations at which the laundry sticks to the laundry tub, and the process proceeds to the next step after the rotation speed reaches a third resonance rotation speed or higher.

  By driving the circulating pump after the rinsing operation, the circulating water from the circulating water channel is absorbed by the laundry and acts on the deformation of the laundry. This promotes an improvement in the balance of the laundry attached to the washing tub. For this reason, generation | occurrence | production of imbalance can be suppressed, the process for balance improvement can be shortened, and the washing time can be shortened.

  Further, by rotating the laundry pump so as to stick to the washing tub while driving the circulation pump, water absorption and dehydration to the laundry are repeated. Thereby, the replacement of the rinse water with respect to the laundry is promoted, and the rinse performance can be improved.

  In addition, when the number of rotations of the rotating drum reaches or exceeds the third resonance number of rotations with the largest vibration, the process is shifted to the next step. Does not prolong the washing 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 first rinsing process of the drum type washing machine Time chart showing the operation of the second rinsing process and dewatering process of the drum type washing machine The time chart which shows the operation | movement of the 2nd rinse process and dehydration process of the drum type washing machine in Embodiment 2 of this invention

  A washing machine according to a first aspect of the present invention is a washing tub, a water tub that houses the washing tub, a driving means that rotationally drives the washing tub, a water supply means that supplies water into the water tub, and a drain that drains from the water tub. Means, a circulation water channel for discharging water in the water tub into the washing tub, a circulation pump for sucking water in the water tank and feeding it to the circulation water channel, the drive means, the water supply means, and the drainage means And a control means for driving the circulation pump to control each step of washing, and after the rinsing operation, the control means drives the circulation pump to apply water to the laundry, and the laundry is put into the washing tub. The washing tub is rotated at a rotational speed of at least sticking to, and after the rotational speed has reached the tertiary resonance rotational speed or more, the process proceeds to the next step.

  With such a configuration, the circulating water from the circulating water channel is absorbed by the laundry by driving the circulation pump after the rinsing operation, which acts on the deformation of the laundry. This promotes an improvement in the balance of the laundry attached to the washing tub. For this reason, generation | occurrence | production of imbalance can be suppressed, the process for balance improvement can be shortened, and the washing time can be shortened.

  Further, by rotating the laundry pump so as to stick to the washing tub while driving the circulation pump, water absorption and dehydration to the laundry are repeated. Thereby, the replacement of the rinse water with respect to the laundry is promoted, and the rinse performance can be improved.

  In addition, when the number of rotations of the rotating drum reaches or exceeds the third resonance number of rotations with the largest vibration, the process is shifted to the next step. Does not prolong the washing time.

  In a second aspect of the invention, the control means of the drum type washing machine of the first aspect of the invention starts drainage while the washing tub is rotating before the transition to the next step.

  With such a configuration, since the washing tub rotates before the start of drainage, water absorption and dehydration to the laundry are repeated by the rotation of the washing tub. This increases the circulation amount of the rinse water to the laundry, so that the rinsing performance can be improved.

  Moreover, since the water level of the water tank is gradually lowered due to the drainage, the resistance of the water to the rotation of the washing tank gradually decreases. Thereby, the rotation speed of the washing tub can be increased smoothly.

  Moreover, since the rotation speed of the washing tub is increased during drainage for the purpose of dewatering, the time required for dewatering can be shortened compared with the case where the rotation speed of the washing tub is increased after completion of drainage.

  In a third aspect of the invention, the control means of the drum type washing machine of the first aspect of the invention starts rotation of the washing tub during drainage before shifting to the next step.

  With such a configuration, since the laundry is rinsed by circulating water using drainage or rotation of the washing tub, the rinsing performance can be improved.

  Moreover, since the water level of the rinse water is gradually lowered due to the drainage, the resistance of the water to the rotation of the washing tub gradually decreases. For this reason, the rotation speed of the washing tub can be increased smoothly.

  Moreover, since the rotation speed of the washing tub is increased during drainage for the purpose of dewatering, the time required for dewatering can be shortened compared with the case where the rotation speed of the washing tub is increased after completion of drainage.

  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 has passed a predetermined time by a signal from the time measuring means. When this is confirmed, the drainage is started.

  With such a configuration, the time from the start of rotation of the washing tub in one direction to the start of drainage of rinse water can be set. Thus, the time until the start of drainage can be fixed, and stable drainage can be performed. Furthermore, the variation in the washing time from the start of washing to the completion of dehydration can be reduced.

  According to a fifth aspect of the invention, the drum type washing machine according to any one of the first to fourth aspects includes a time measuring unit that measures time, and the control unit has passed a predetermined time by a signal from the time measuring unit. If it is confirmed, the circulation pump is controlled.

  With such a configuration, it is possible to set a time for starting or ending the application of the circulating water to the laundry. Thereby, since the rinsing time by circulating water can be lengthened, the rinsing performance can be further improved.

  According to a sixth aspect of the present invention, the drum-type washing machine according to any one of the first to fifth aspects includes a water level detection unit that detects a water level of the water tank, and the control unit is configured to control the water level from the water level detection unit. It controls the circulation pump.

  With such a configuration, it is possible to set a water level at which the driving of the circulation pump is stopped, and it is possible to prevent air circulation of the circulation pump.

  According to a seventh aspect of the invention, in the drum type washing machine according to any one of the first to sixth 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 between the laundry and the rinsing water can be improved with a small amount of water, and the rinsing performance can be improved.

  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 washing machine 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 rotating shaft 4a in this way, the opening 13 on the front surface side of the water tank 3 can be arranged on the upper side, and the rotating drum 4 can be passed through the opening 13 of the water tank 3 without taking a posture of bending greatly. The laundry inside 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.

  Moreover, the opening part which opens in the rotating drum 4 through the opening 13 of the water tank 3 is provided in the front side of the washing machine main body 1, and the opening-and-closing door 5 is provided in the opening part so that opening and closing is possible. 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 washing machine main 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 washing machine body 1, sucks the washing liquid and the rinsing water in the water tank 3, and feeds the water to the circulation water channel 31. In addition, 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 13 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 is connected as indicated by an arrow A in FIG. 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. In addition, the injection port 51 is not limited to the lower portion, 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 addition, in this Embodiment 1, although it was set as the structure which installs the circulation pump 30 on the baseplate 1a which is the bottom part of the washing machine main body 1, it is not limited to this, The water in the water tank 3 is circulated. However, 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 present embodiment 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 the first embodiment 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. In the present invention, the drainage dewatering step includes both intermediate drainage dewatering and 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 operation of the first rinsing process of the drum type washing machine in Embodiment 1 of the present invention, and FIG. 4 shows the second rinsing process of the drum type washing machine in Embodiment 1 of the present invention. It is a time chart which shows operation | movement of a dehydration process. The first rinsing step is performed in the order of intermediate dehydration, water supply stirring, and 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. After the rotation time t11 at the high rotation number in the first rinsing process has elapsed, the motor 6 is stopped. The rotation speed of the rotating drum 4 becomes 0 r / min, and 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 step, the control unit 11a opens the water supply valve 7b while rotating the rotating drum 4 in one 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 h101, the control unit 11a stops water supply. At the same time, the circulation pump 30 is turned on to pour circulating water on the laundry. At this time, lint is removed by increasing the number of rotations of the rotating drum 4 to, for example, about 170 r / min. The control unit 11a measures the time from the start of increasing the rotational speed of the rotating drum 4 or the time from the increase of the rotational speed by the time measuring unit 11f. After a predetermined time has elapsed, the number of revolutions is decreased, the operation is switched to the stirring operation, and water supply is resumed. The laundry is peeled off from the inner peripheral wall of the rotating drum 4 by the stirring operation, and the laundry in the rinsing water stored in the water tank 3 is stirred to perform rinsing.

  When the rinsing water is accumulated in the water tank 3 and the water level detection means 10 detects the water level h102, the control unit 11a stops the operation of the rotating drum 4 and the water supply stirring process is ended.

  When entering the stirring step, the time measuring unit 11f starts measuring time t12 after the water supply is stopped. At this time, the rotating drum 4 continues the stirring operation performed from the feed water stirring step. Further, the time t12 after the water supply is stopped to give sufficient rinsing performance is set longer than the rotation time t11 at the high rotation speed in the first rinsing process.

  When the stirring time t12 in the first rinsing process has elapsed, the controller 11a stops the operation of the circulation pump 30 and the rotary drum 4. This completes the stirring step, that is, the first rinsing step is completed.

  The second rinsing step is performed in the order of intermediate drainage dewatering, feed water stirring, and stirring.

  When the intermediate drainage dehydration process is started, the control unit 11a sends a signal to the motor 6 to rotate the rotating drum 4 in one direction, for example, clockwise. The rotation direction at this time may be the same as or opposite to the rotation direction in one direction of the feed water stirring process.

  The rotational speed of the rotating drum 4 is increased until the rotational speed becomes equal to or higher than the third-order resonance rotational speed. Since the tertiary resonance rotational speed is about 340 to 360 r / min, in the first embodiment of the present invention, the rotational speed of the rotating drum 4 is increased until it reaches 370 r / min. Note that the rotational speed is not limited to 370 r / min, and may be, for example, 400 r / min.

The controller 11a starts drainage while the rotating drum 4 is rotating before the transition to the drainage operation, which is the next step. Further, when it is confirmed that a predetermined time has elapsed from the signal from the time measuring unit 11f, the control unit 11a starts draining and controls the circulation pump 30. Details are as follows.

  The time measuring unit 11f starts measuring time after the rotating drum 4 starts rotating in one direction. When the control unit 11a confirms that the time t13 has elapsed from the signal from the time measurement unit 11f, the control unit 11a sends a signal to the drain valve 8b to start draining.

  When drainage is started and the water level in the water tank 3 is lowered, the control unit 11a gradually increases the rotational speed of the rotating drum 4 by a signal from the water level detecting means 10, and the laundry in the rotating drum 4 is stored in the rotating drum 4. It rotates in the state which sticks in the surrounding wall 4c.

  In addition, when the control unit 11a confirms that the time t14 has elapsed from the signal from the time measurement unit 11f, the control unit 11a sends a signal to the circulation pump 30 to drive the circulation pump 30.

  Circulating water that has passed through the circulating water channel 31 is discharged from the injection port 51 by the circulation pump 30 and pours the circulating water on the laundry. Due to the movement of the laundry caused by the rotation of the rotating drum 4 and the circulating water, the detergent components in the laundry are easily moved from the laundry. Further, the laundry absorbs the rinse water by the contact with the rinse water remaining in the rotary drum 4 due to the rotation of the rotary drum and the circulating water discharged. Further, dehydration is performed by centrifugal force generated by the rotation of the rotating drum 4. As described above, the laundry can repeatedly remove water from and rinse with rinse water, whereby the detergent components remaining in the laundry can be efficiently removed.

  When drainage progresses and the water level detection means 10 detects the predetermined water level h103, the controller 11a stops the circulation pump 30 and ends the discharge of the circulating water. By stopping the circulation pump 30 at a predetermined water level, air leakage from the circulation pump 30 can be prevented. Therefore, the stop of the circulation pump 30 may be set by the time from the start of drainage or the rotation of the rotary drum 4 in one direction regardless of the predetermined water level.

  The control unit 11a rotates the rotating drum 4 at a rotational speed equal to or higher than the rotational speed at which the laundry sticks to the peripheral wall 4c of the rotating drum 4, and shifts to the next step after the rotational speed exceeds the tertiary resonance rotational speed. To. The details are as follows.

  When the rotational speed detection means 21 detects that the rotational speed of the rotating drum 4 has become equal to or higher than the tertiary resonance rotational speed, the balance control operation is started.

  When the rotational speed of the rotating drum 4 reaches 370 r / min, which is equal to or higher than the tertiary resonance rotational speed, the balance control operation 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.

  When there is no unbalance in the laundry and the rotation is stable, the process proceeds to a full-fledged dehydration operation. The controller 11a increases the rotational speed of the rotating drum 4 to a predetermined rotational speed. The predetermined rotational speed increases to a rotational speed lower than that during intermediate dehydration, such as 500 r / min. By lowering the rotational speed of the rotating drum 4 than during intermediate dehydration, a certain amount of water is retained in the laundry, so that the centrifugal force does not decrease and the rinsing performance is maintained. In addition, the amount of water contained in the laundry is larger than that during intermediate dehydration, and the detergent components in the laundry are easily dissolved.

In this way, by shifting to the next process after the vibration of the washing machine main body 1 reaches the third resonance rotational speed or more at which the vibration becomes the largest, the balance is lost and it becomes difficult to stop dehydration. Is not protracted.

  When the rotational speed detection means 21 detects that the rotational speed of the rotary drum 4 has reached 500 r / min, the time measuring unit 11 f starts measuring the time. When the predetermined time t15 has elapsed, the controller 11a stops the operation of the rotating drum 4. Note that the control unit 11a may stop the rotating drum 4 at time t15 ′ after the rotation of the rotating drum 4 in one direction is started.

  When the rotation of the rotating drum 4 stops, the intermediate drainage dehydration process in the second rinsing process is completed, and the process proceeds to the feed water stirring process. At this time, the laundry is stuck to the rotating drum 4.

  The controller 11 a opens the water supply valve 7 b and accumulates rinsing water in the water tank 3. Further, the rotating drum 4 is agitated through the power switching means 11d, and the laundry stuck to the rotating drum 4 is peeled off from the rotating drum 4. The laundry in the rinse water collected in the water tank 3 is stirred and rinsed. When the rinse water accumulates in the water tank 3 and the water level detection means 10 detects the water level h104, the control unit 11a sends a signal to the circulation pump 30. As the circulation pump 30 is driven, the circulating water that has passed through the circulation channel 31 is discharged from the injection port 51, and the laundry starts to be rinsed.

  Moreover, if the water level detection means 10 detects the water level h105, the control part 11a will stop water supply. The time measuring unit 11f starts to measure the time from the stop of water supply. When the predetermined time t <b> 16 elapses, the control unit 11 a stops the operation of the rotating drum 4 and the operation of the circulation pump 30. At this time, a part of the laundry is immersed in the rinse water collected in the water receiving tank 2. Here, the stirring step ends, that is, the second rinsing step ends.

  Then, it transfers to a dehydration process. When entering the final drainage dewatering step, the control unit 11a sends a signal to the motor 6, and the rotating drum 4 starts to rotate in one direction, for example, clockwise. Further, the time measuring unit 11f starts measuring time after the rotating drum 4 starts rotating in one direction. When the time measuring unit 11f confirms that the time t17 has elapsed, the control unit 11a sends a signal to the drain valve 8b and starts draining the rinse water accumulated in the water tank 3. When the time t18 has elapsed, a signal is sent to the circulation pump 30, and the rinse water that has passed through the circulation water channel 31 is discharged from the injection port 51, and the laundry starts to be rinsed. Further, the control unit 11 a gradually increases the rotational speed of the rotating drum 4 by a signal from the water level detection means 10. The laundry in the rotating drum 4 rotates while sticking to the peripheral wall 4c of the rotating drum 4. Due to the movement of the laundry in the rotating drum 4 and the discharge of the rinse water, the detergent component in the laundry moves from the laundry and dissolves in the rinse water existing around the laundry. Further, the laundry absorbs water by contact with the remaining rinse water by rotation and discharge of the rinse water. Further, dehydration is also performed by centrifugal force generated by the rotation of the rotating drum 4. When the laundry repeatedly absorbs and dehydrates the rinse water, the remaining detergent components can be efficiently removed.

  When drainage proceeds and the water level detection means 10 detects the predetermined water level h106, the control unit 11a stops the circulation pump 30 and ends the discharge of the circulating water. By stopping the circulation pump 30 at a predetermined water level, air leakage from the circulation pump 30 can be prevented. Therefore, the stop of the circulation pump 30 may be set by the time from the start of drainage or the rotation of the rotary drum 4 in one direction regardless of the predetermined water level.

  The control unit 11a rotates the rotating drum 4 at a rotational speed equal to or higher than the rotational speed at which the laundry sticks to the peripheral wall 4c of the rotating drum 4, and shifts to the next step after the rotational speed exceeds the tertiary resonance rotational speed. To. The details are as follows.

  When the rotational speed detection means 21 detects that the rotational speed of the rotating drum 4 has become equal to or higher than the tertiary resonance rotational speed, the balance control operation is started. In the first embodiment of the present invention, the rotational speed equal to or higher than the tertiary resonance rotational speed is 370 r / min. 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.

  When there is no unbalance in the laundry and the rotation is stable, the process proceeds to a full-fledged dehydration operation. The controller 11a increases the rotational speed of the rotating drum 4 to a predetermined rotational speed. The predetermined rotation speed is, for example, 900 r / min. The control unit 11a stops the rotating drum 4 when the time t19 has elapsed since the rotational speed of the rotating drum 4 reached 900 r / min. The time for stopping the rotating drum 4 is the time after reaching the predetermined number of rotations, but is not limited to this. For example, as the time t19 ′ after the rotating drum 4 starts rotating in one direction. Also good.

  In this way, by shifting to the next process after the vibration of the washing machine main body 1 reaches the third resonance rotational speed or more at which the vibration becomes the largest, the balance is lost and it becomes difficult to stop dehydration. Is not protracted.

  Thus, the dehydration process is completed, that is, the washing is completed. The controller 11a turns off the washing machine body 1.

  After completion of the rinsing process in the above washing, the rotating drum 4 rotates in one direction before the drainage is started. In the situation where there is plenty of rinse water before drainage, the detergent component in the laundry dissolves in the rinse water present around the laundry, so the amount of detergent component remaining in the laundry decreases, so the rinse performance is improved To do.

  Further, at this time, since the rinse water is applied to the laundry by the circulating water until the water level of the rinse water is lowered to the predetermined water level by the drainage, the laundry absorbs the circulating water and the amount of water absorbed by the laundry increases. Thereafter, since the dehydration is performed by the rotation of the rotating drum 4, the replacement of the rinse water with respect to the laundry is further promoted. Thereby, the rinsing performance can be further improved.

  Further, when the rotational speed of the rotating drum 4 becomes equal to or higher than the third-order resonance frequency, the process proceeds to the next step, so that the possibility that the rotating drum 4 can smoothly rotate to the target rotational speed thereafter increases. For this reason, dehydration can be performed stably without losing balance and without stopping dehydration.

  When drainage is performed, the rinse water is discharged out of the washing machine main body 1. However, the rinse water in the rotary drum 4 decreases as the drainage amount increases. For this reason, the number of rotations of the rotating drum 4 can be easily increased corresponding to the water level, and the laundry gradually sticks to the peripheral wall 4c of the rotating drum 4. The laundry comes into contact with the rinse water remaining in the rotating drum 4 by rotation, and the circulated water is applied to the laundry to absorb the rinse water. As a result, the detergent component dissolves into the rinse water from the laundry. The rotation speed of the rotating drum 4 can be increased by lowering the water level. For this reason, water containing a lot of detergent components contained in the laundry is removed from the laundry by the centrifugal force due to the increase in the rotational speed of the rotary drum 4. For this reason, it is possible to further improve the rinsing performance.

In addition, by applying the circulating water to the laundry while the rotary drum 4 is rotating, the laundry is deformed and the balance of the laundry on the rotary drum 4 is improved. For this reason, since it sticks to the rotating drum 4 without generating unbalance of the laundry, the washing time can be shortened by omitting the balance control time. In addition, the laundry is rotated at a rotational speed higher than that of the rotating drum, and the intermediate dehydration or dehydration process is started. Since the intermediate dehydration in the next rinsing or the re-start-up of dehydration in the dehydration process is not necessary, the time of the rinse process and dehydration process in washing can be shortened.

  Moreover, since the time until the drainage of the rinse water from the rotation of the rotating drum 4 in one direction can be set, the time until the drainage start can be fixed, and stable drainage can be performed. The variation in washing time can be prevented. In addition, since it is possible to set the time for starting to apply the circulating water after the rotating drum 4 starts rotating in one direction, the rinsing performance can be further improved. Moreover, the drum type washing machine in Embodiment 1 of the present invention can make the contact with the laundry good with a small amount of rinsing water by tilting the rotating shaft 4a of the rotating drum 4 forward. Rinsing performance can be improved.

  In the first embodiment of the present invention, the rotational speed of the circulation pump 30 and the rotational speed of the rotary drum 4 are not particularly specified. Regarding the 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. However, the ON period is not particularly specified, and the ON / OFF control can be performed. Good. In addition, when the first rinsing process and the second rinsing process are completed, the circulation pump 30 is turned off and turned on after a predetermined time. However, the present invention is not limited to this. The circulation pump 30 may not be turned off at the completion of the first rinsing step and the second rinsing step, but may be turned off at the water level. In addition, the length of the predetermined time does not particularly define the length of time.

(Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings after the second rinsing step different from Embodiment 1. FIG. 5 is a time chart showing the operations of the second rinsing step and the dehydrating step of the drum type washing machine in the second embodiment of the present invention.

  In Embodiment 2 of this invention, the control part 11a starts rotation of the rotating drum 4 during the waste_water | drain before transfer of the following process.

  The second rinsing step is performed in the order of intermediate drainage dewatering, feed water stirring, and stirring.

  When entering the intermediate drainage dewatering step, the control unit 11a sends a signal to the drainage valve 8b to start draining. When the time t23 elapses from the start of drainage, a signal is sent to the motor 6 to rotate the rotating drum 4 in one direction, for example, clockwise. The rotation direction at this time may be the same as or opposite to the rotation direction in one direction of the feed water stirring process.

  The rotational speed of the rotating drum 4 is increased until the rotational speed becomes equal to or higher than the third-order resonance rotational speed. Since the tertiary resonance rotational speed is about 340 to 360 r / min, the rotational speed of the rotating drum 4 is increased until it reaches 370 r / min in the second embodiment of the present invention. Note that the rotational speed is not limited to 370 r / min, and may be, for example, 400 r / min.

  When drainage is started and the water level of the water tank 3 is lowered, the control unit 11a drives the circulation pump 30 when the predetermined water level h203 is detected by a signal from the water level detection means 10. As the water level in the water tank 3 decreases, the rotational speed of the rotating drum 4 gradually increases, and the laundry in the rotating drum 4 rotates while sticking to the peripheral wall 4c of the rotating drum 4.

Circulating water that has passed through the circulating water channel 31 is discharged from the injection port 51 by the circulation pump 30 and pours the circulating water on the laundry. Due to the movement of the laundry caused by the rotation of the rotating drum 4 and the circulating water, the detergent components in the laundry are easily moved from the laundry. Further, the laundry absorbs the rinse water by the contact with the rinse water remaining in the rotary drum 4 due to the rotation of the rotary drum and the circulating water discharged. Further, dehydration is performed by centrifugal force generated by the rotation of the rotating drum 4. As described above, the laundry can repeatedly remove water from and rinse with rinse water, whereby the detergent components remaining in the laundry can be efficiently removed.

  When drainage further proceeds and the water level detection means 10 detects the predetermined water level h204, the control unit 11a stops the circulation pump 30 and ends the discharge of the circulating water. By stopping the circulation pump 30 at a predetermined water level, air leakage from the circulation pump 30 can be prevented. Therefore, the stop of the circulation pump 30 may be set by the time from the start of drainage or the rotation of the rotary drum 4 in one direction regardless of the predetermined water level.

  The control unit 11a rotates the rotating drum 4 at a rotational speed equal to or higher than the rotational speed at which the laundry sticks to the peripheral wall 4c of the rotating drum 4, and shifts to the next step after the rotational speed exceeds the tertiary resonance rotational speed. To. The details are as follows.

  When the rotational speed detection means 21 detects that the rotational speed of the rotating drum 4 has become equal to or higher than the tertiary resonance rotational speed, the control unit 11a determines to proceed to the next step. By shifting to the next process after the vibration of the washing machine main body 1 reaches the maximum, which is higher than the third resonance rotational speed, the balance is lost and it becomes difficult to stop the dehydration, thereby unnecessarily prolonging the washing time. There is no.

  When the rotational speed of the rotary drum 4 reaches 370 r / min, which is equal to or higher than the tertiary resonance rotational speed, the control unit 11a further increases the speed of the rotational speed increase to a predetermined rotational speed, for example, 500 r / min. Increased to a lower rotational speed than during intermediate dehydration. By lowering the rotational speed of the rotating drum 4 than during intermediate dehydration, a certain amount of water is retained in the laundry, so that the centrifugal force does not decrease and the rinsing performance is maintained. In addition, the amount of water contained in the laundry is larger than that during intermediate dehydration, and the detergent components in the laundry are easily dissolved.

  When the rotational speed detection means 21 detects that the rotational speed of the rotary drum 4 has reached 500 r / min, the time measuring unit 11 f starts measuring the time. When the predetermined time t24 has elapsed, the controller 11a stops the operation of the rotating drum 4.

  When the rotation of the rotating drum 4 stops, the intermediate drainage dehydration process in the second rinsing process is completed, and the process proceeds to the feed water stirring process. At this time, the laundry is stuck to the rotating drum 4.

  In the water supply stirring step, first, the control unit 11 a opens the water supply valve 7 b and accumulates rinsing water in the water tank 3. Further, the rotating drum 4 is agitated through the power switching means 11d, and the laundry stuck to the rotating drum 4 is peeled off from the rotating drum 4. The laundry in the rinse water collected in the water tank 3 is stirred and rinsed. When the rinse water accumulates in the water tank 3 and the water level detection means 10 detects the water level h205, the control unit 11a sends a signal to the circulation pump 30. As the circulation pump 30 is driven, the circulating water that has passed through the circulation channel 31 is discharged from the injection port 51, and the laundry starts to be rinsed.

  Moreover, if the water level detection means 10 detects the water level h206, the control part 11a will stop water supply. The time measuring unit 11f starts to measure the time from the stop of water supply. When the predetermined time t25 elapses, the control unit 11a stops the operation of the rotating drum 4 and the operation of the circulation pump 30. At this time, a part of the laundry is immersed in the rinse water collected in the water receiving tank 2. Here, the stirring step ends, that is, the second rinsing step ends.

Then, it transfers to a dehydration process. When entering the final drainage dewatering step, the control unit 11a
A signal is sent to b to start draining. When time t26 elapses from the start of drainage, a signal is sent to the motor 6 to rotate the rotating drum 4 in one direction, for example, clockwise. The rotation direction at this time may be the same as or opposite to the rotation direction in one direction of the feed water stirring process.

  The rotational speed of the rotating drum 4 is increased until the rotational speed becomes equal to or higher than the third-order resonance rotational speed. Since the tertiary resonance rotational speed is about 340 to 360 r / min, the rotational speed of the rotating drum 4 is increased until it reaches 370 r / min in the second embodiment of the present invention. Note that the rotational speed is not limited to 370 r / min, and may be, for example, 400 r / min.

  When the drainage is started and the water level of the water tank 3 is lowered, the control unit 11a detects the predetermined water level h207 by a signal from the water level detection means 10 and drives the circulation pump 30. As the water level in the water tank 3 decreases, the rotational speed of the rotating drum 4 gradually increases, and the laundry in the rotating drum 4 rotates while sticking to the peripheral wall 4c of the rotating drum 4.

  Circulating water that has passed through the circulating water channel 31 is discharged from the injection port 51 by the circulation pump 30 and pours the circulating water on the laundry. Due to the movement of the laundry caused by the rotation of the rotating drum 4 and the circulating water, the detergent components in the laundry are easily moved from the laundry. Further, the laundry absorbs the rinse water by the contact with the rinse water remaining in the rotary drum 4 due to the rotation of the rotary drum and the circulating water discharged. Further, dehydration is performed by centrifugal force generated by the rotation of the rotating drum 4. As described above, the laundry can repeatedly remove water from and rinse with rinse water, whereby the detergent components remaining in the laundry can be efficiently removed.

  When drainage further proceeds and the water level detection means 10 detects the predetermined water level h208, the control unit 11a stops the circulation pump 30 and ends the discharge of the circulating water. By stopping the circulation pump 30 at a predetermined water level, air leakage from the circulation pump 30 can be prevented. Therefore, the stop of the circulation pump 30 may be set by the time from the start of drainage or the rotation of the rotary drum 4 in one direction regardless of the predetermined water level.

  The controller 11a rotates the rotating drum 4 at a rotational speed equal to or higher than the rotational speed at which the laundry sticks to the peripheral wall 4c of the rotating drum 4, and moves to the next step after the rotational speed exceeds the third resonance rotational speed. To. The details are as follows.

  When the rotational speed detection means 21 detects that the rotational speed of the rotating drum 4 has become equal to or higher than the tertiary resonance rotational speed, the control unit 11a determines to proceed to the next step. By shifting to the next process after the vibration of the washing machine main body 1 reaches the maximum, which is higher than the third resonance rotational speed, the balance is lost and it becomes difficult to stop the dehydration, thereby unnecessarily prolonging the washing time. There is no.

  When the rotational speed of the rotating drum 4 reaches 370 r / min, which is a rotational speed equal to or higher than the tertiary resonance rotational speed, the controller 11a further increases the rotational speed increase speed to a predetermined rotational speed. The predetermined rotation speed is, for example, 900 r / min.

  When the rotational speed detection means 21 detects that the rotational speed of the rotary drum 4 has reached 900 r / min, the time measuring unit 11 f starts measuring time. When the predetermined time t27 has elapsed, the control unit 11a stops the operation of the rotating drum 4.

  Thus, the dehydration process is completed, that is, the washing is completed. The controller 11a turns off the washing machine body 1.

After completion of the rinsing process in the above washing, the rotating drum 4 rotates in one direction before the drainage is started. In the situation where there is plenty of rinse water before drainage, the detergent component in the laundry dissolves in the rinse water present around the laundry, so the amount of detergent component remaining in the laundry decreases, so the rinse performance is improved To do.

  Further, at this time, since the rinse water is applied to the laundry by the circulating water until the water level of the rinse water is lowered to the predetermined water level by the drainage, the laundry absorbs the circulating water and the amount of water absorbed by the laundry increases. Thereafter, since the dehydration is performed by the rotation of the rotating drum 4, the replacement of the rinse water with respect to the laundry is further promoted. Thereby, the rinsing performance can be further improved.

  Further, when the rotational speed of the rotating drum 4 becomes equal to or higher than the third-order resonance frequency, the process proceeds to the next step, so that the possibility that the rotating drum 4 can smoothly rotate to the target rotational speed thereafter increases. For this reason, dehydration can be performed stably without losing balance and without stopping dehydration.

  When drainage is performed, the rinse water is discharged out of the washing machine main body 1. However, the rinse water in the rotary drum 4 decreases as the drainage amount increases. For this reason, the number of rotations of the rotating drum 4 can be easily increased corresponding to the water level, and the laundry gradually sticks to the peripheral wall 4c of the rotating drum 4. The laundry comes into contact with the rinse water remaining in the rotating drum 4 by rotation, and the circulated water is applied to the laundry to absorb the rinse water. As a result, the detergent component dissolves into the rinse water from the laundry. The rotation speed of the rotating drum 4 can be increased by lowering the water level. For this reason, water containing a lot of detergent components contained in the laundry is removed from the laundry by the centrifugal force due to the increase in the rotational speed of the rotary drum 4. For this reason, it is possible to further improve the rinsing performance.

  In addition, by applying the circulating water to the laundry while the rotary drum 4 is rotating, the laundry is deformed and the balance of the laundry on the rotary drum 4 is improved. For this reason, since it sticks to the rotating drum 4 without generating unbalance of the laundry, the washing time can be shortened by omitting the balance control time. In addition, the laundry is rotated at a rotational speed higher than that of the rotating drum, and the intermediate dehydration or dehydration process is started. Since the intermediate dehydration in the next rinsing or the re-start-up of dehydration in the dehydration process is not necessary, the time of the rinse process and the dehydration process in washing can be shortened.

  Further, by starting the rotation of the rotating drum 4 during the drainage, the water level of the rinse water gradually decreases during the rotation of the rotating drum 4, so that the resistance of the water to the rotation of the rotating drum 4 gradually decreases. . For this reason, the rotation speed of the rotating drum 4 can be increased smoothly.

  In the first embodiment of the present invention, the rotational speed of the circulation pump 30 and the rotational speed of the rotary drum 4 are not particularly specified. Regarding the 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. However, the ON period is not particularly specified, and the ON / OFF control can be performed. Good. In addition, when the first rinsing process and the second rinsing process are completed, the circulation pump 30 is turned off and turned on after a predetermined time. However, the present invention is not limited to this. The circulation pump 30 may not be turned off at the completion of the first rinsing step and the second rinsing step, but may be turned off at the water level. In addition, the length of the predetermined time does not particularly define the length of time.

  The washing machine according to the present invention repeats the water absorption from the rinse water of the laundry at the time of drainage and the dehydration by the rotation of the washing tub, whereby the detergent component in the laundry melts and the rinsing performance can be 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.

1 Washing machine body 1a Base plate 3 Water tank 3f Front end wall 4 Rotating drum (washing tank)
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 Opening 14 Sealing material 18 Air guide port 21 Rotational speed detection means 30 Circulation pump 31 Circulating water channel 31b Discharge side channel 51 Injection port

Claims (7)

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;
A circulation channel for discharging water in the water tub into the washing tub;
A circulation pump for sucking water in the water tank and feeding the water to the circulation channel;
Control means for driving the drive means, the water supply means, the drainage means and the circulation pump to control each step of washing,
After the rinsing operation, the control means drives the circulation pump to put water on the laundry, rotates the laundry tub at a rotational speed equal to or higher than the rotational speed at which the laundry sticks to the laundry tub, and the rotational speed is a third order. A drum-type washing machine that shifts to the next process after the resonance rotational speed is exceeded. The drum type washing machine according to claim 1, wherein the control means starts drainage during rotation of the washing tub before the transition to the next step. The drum type washing machine according to claim 1, wherein the control means starts rotation of the washing tub during drainage before the transition to the next step. 4. The apparatus according to claim 1, further comprising a time measuring unit that measures time, wherein the control unit starts the drainage after confirming that a predetermined time has elapsed by a signal from the time measuring unit. Drum-type washing machine. 5. The apparatus according to claim 1, further comprising a time measuring unit that measures time, wherein the control unit controls the circulation pump when it is confirmed that a predetermined time has passed by a signal from the time measuring unit. A drum-type washing machine as described in 1. Comprising water level detection means for detecting the water level of the water tank,
The drum type washing machine according to any one of claims 1 to 5, wherein the control means controls the circulation pump according to a water level from the water level detection means. The drum type washing machine according to any one of claims 1 to 6, wherein the rotation axis of the washing tub is inclined downward from the front side toward the back side.