KR100841833B1 - Drum Washing Machine and Washing Method - Google Patents

Abstract

The drum type washing machine 50 constitutes circulation channels 22, 26, 27, and 28 of the washing water rotating in accordance with the rotation of the rotary drum 5, and washes the washing water in the intake port 20 provided in the drip tank 6. The wash water is sprinkled on the laundry by circulating the wash water put in the water intake port 20 from the discharge port 34 into the rotary drum 5. As a result, the washing water contained in the laundry and the washing water inside and outside the rotary drum 5 are actively circulated, thereby improving cleaning power and rinsing performance and reducing rinsing unevenness.

Description

Drum type washing machine and washing method using it {DRUM-TYPE WASHING MACHINE AND WASHING METHOD USING THE SAME}

1 is a longitudinal cross-sectional view of a drum type washing machine in an embodiment of the present invention;

FIG. 2 is a block diagram showing the configuration of a control apparatus of the drum type washing machine shown in FIG. 1; FIG.

3 is a perspective view of the drip tank body used in the drum washing machine shown in FIG.

4 is a perspective view of the drip tray cover used in the drum washing machine shown in FIG.

5 is a bottom plan view of a rotating drum used in the drum washing machine shown in FIG. 1;

6 is a sectional view of an essential part of a rotating drum used in the drum washing machine shown in FIG. 1;

7A is an operation flowchart of a control unit used for the drum type washing machine shown in FIG. 1;

7B is an operation flowchart of the control unit used for the drum type washing machine shown in FIG. 1;

8 is an operation flowchart of another form of a control unit used in the drum type washing machine shown in FIG. 1;

9 is a longitudinal sectional view showing the structure of a conventional drum type washing machine.

Explanation of symbols for the main parts of the drawings

1: washing machine body 5: rotary drum

6: drip tank 7: drive motor

9: first water supply valve 11: second water supply valve

15 control device 16 control unit

17: setting unit 18: storage unit

19: power switching unit 20: water intake

22, 26, 27, 28: circulation channel 34: discharge port

50: drum type washing machine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for carrying out each stroke such as washing, rinsing, and dehydration using a rotating drum having a rotating shaft in a horizontal or inclined direction, and a washing method using the same.

9 is a longitudinal sectional view of a conventional drum type washing machine. Hereinafter, the structure of the conventional drum type washing machine is demonstrated using FIG.

On the outer circumference of the rotating drum 103 (hereinafter referred to as the drum 103), a plurality of small holes 108 for water removal are formed. Outside the drum 103, a drip tank 102 (hereinafter referred to as a water tank 102) is rotatably provided. The motor 104 for driving the drum 103 is fixed to the outer bottom of the water tank 102. In addition, the water tank 102 is oscillated and supported vertically downward by the spring body 109 from the outer box 101 which is a washing machine main body, and is supported. A water supply hose 112 for supplying washing water extended from the water supply valve 106 is connected to the upper portion of the water tank 102. The drain port 114 connected to the drain valve 113 is formed in the bottom bottom part of the water tank 102. Inside the drum 103, a projection 107 for stirring clothes which are laundry is formed. Moreover, the 1st opening part 103a (henceforth opening part 103a) in which clothing | emission is performed is formed corresponding to the position of the lid | cover 105. As shown in FIG. The lid 105 is arranged to be openable and closed with respect to the outer box 101. Such a conventional drum type washing machine is disclosed, for example, in Japanese Patent Laid-Open No. 1997-215894.

A second opening 102a (hereinafter referred to as opening 102a) is formed at the position of the water tank 102 corresponding to the opening 103a and the lid 105. Between the opening 102a and the opening of the front side of the outer box 101, the packing member 115 which consists of flexible materials, such as substantially cylindrical rubber | gum, is provided. The packing member 115 is hermetically fixed to the opening 102a. In addition, when the lid 105 is closed, the packing member 115 is in watertight contact with the outer box 101.

The control apparatus 116 is provided in the upper front side of the outer box 101, and controls the operation | movement of the motor 104, the water supply valve 106, the drain valve 113, etc. Moreover, it is comprised by the control part, an input part, a display part, etc. which control sequentially a series of strokes, such as washing | cleaning, rinsing, and dehydration.

In the conventional drum type washing machine 150 having the above configuration, the operation will be described next. The lid 105 is opened, and laundry, which is laundry, is put into the drum 103. Next, after the power switch (not shown) is "ON", the start switch (not shown) provided in the control apparatus 116 is operated, and the drum type washing machine 150 starts operation. When the operation of the drum type washing machine 150 is started, the water supply valve 106 is operated to supply water, and when the predetermined water level is detected by the water level detection unit (not shown), the water supply is stopped. Thereafter, the motor 104 is driven.

In the washing stroke, the drum 103 is rotated at a relatively low speed, and the clothing inside is lifted by the projection 107 or the like. In addition, the clothing inside the drum 103 falls from an appropriate height and is washed by the impact force. So-called tap cleaning is performed. In addition, although the rotation of the drum 103 is related also to the shape of the protrusion 107, it is common to perform forward and reverse rotation in order to reduce entanglement of clothing.

When the washing stroke is completed, the washing water in the water tank 102 is drained through the drain valve 113, and the process shifts to the rinsing stroke. Also in the rinsing stroke, the operation of the drum 103 is performed almost the same as the washing stroke. In the rinsing stroke, the water supply valve 106 or the like is operated to perform a rinse of water.

In addition, in the dehydration process, after draining the washing water, the drum 103 is rotated at a high speed so that the water contained in the laundry is centrifugally dewatered.

Since the drum type washing machine 150 of such a structure uses the washing method by the weight fall of the laundry, the washing power lack and the rinse nonuniformity by the lack of stirring power are easy to produce. Furthermore, in order to secure a constant cleaning power and rinsing power, a large amount of time is required for each stroke.

In order to solve these problems, there exists a washing machine disclosed by Unexamined-Japanese-Patent No. 1997-215893 (henceforth a patent document 2). The washing machine disclosed in Patent Literature 2 sucks up the wash water collected in the outer tank by a circulation pump and returns it to the rotating drum. In this way, the washing water is sufficiently supplied to the laundry to increase the washing power and the rinsing effect.

In the washing machine using the washing method by the fall of the weight of laundry, lack of washing power and rinsing nonuniformity tend to arise by lack of stirring power. Furthermore, in order to secure a constant cleaning power and rinsing power, a large amount of time is required for each stroke.

Moreover, in the circulation pump type washing machine which circulates wash water using a circulation pump, a large circulation pump is required in order to supply sufficient wash water to a laundry, and to raise a rinsing effect. However, from the viewpoint of the compactness of the washing machine body, it is necessary to make the circulation pump small, and it is difficult to obtain a sufficient amount of circulation water. In addition, a new circulation pump is required, which makes the structure of the washing machine complicated and disadvantageous in terms of productivity or manufacturing cost.

The drum type washing machine of the present invention constitutes a circulation channel of the washing water that rotates in accordance with the rotation of the rotating drum, puts the washing water into the intake port provided in the drip tray, and discharges the washing water from the intake port from the discharge port into the rotating drum. Sprinkle the wash water into the laundry to circulate. By such a configuration, the washing water contained in the laundry and the washing water inside and outside the rotating drum are actively circulated, thereby providing a drum type washing machine which improves cleaning power and rinsing performance and reduces rinsing unevenness.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. In addition, this invention is not limited by this embodiment.

Embodiment

1 is a longitudinal cross-sectional view of a drum type washing machine in an embodiment of the present invention. In FIG. 1, in the main body 1 of the drum type washing machine 50, the bottomed cylindrical water tank 6 (henceforth the water tank 6) is provided. The water tank 6 is supported by the suspension structure (not shown) in the state which inclined downward toward the back surface 1c side from the front side 1b side of the main body 1. As shown in FIG. The water tank 6 is comprised by the drip tank main body 2 (henceforth a water tank main body 2), and the drip tank cover 3 (henceforth a cover 3). The connection part of the water tank main body 2 and the cover 3 is watertightly connected and fixed through the 1st packing member 4, and is fixed. Inside the water tank 6, a rotating drum 5 (hereinafter referred to as drum 5) formed in a cylindrical shape with a bottom is provided. The drum 5 is rotatably supported so that the rotating shaft of the drum 5 may incline downward from the front side 1b side of the main body 1 toward the back side 1c side.

On the front side 1b side of the main body 1, a main body opening 1a (hereinafter referred to as the opening 1a) for entering and exiting laundry such as clothes is formed. Moreover, the door 8 which covers the opening part 1a so that opening and closing is possible is provided.

The cover 3 is provided with a drip-cover cover opening 3a (hereinafter referred to as opening 3a) at a position corresponding to the opening 1a. The drum 5 is provided with a rotating drum opening 5a (hereinafter referred to as opening 5a) at positions corresponding to the opening 1a and the opening 3a. In addition, the opening portion 3a constitutes the first opening portion. In addition, the opening portion 5a constitutes the second opening portion. Through the opening part 1a, the opening part 3a, and the opening part 5a, the laundry is input and output from the exterior of the main body 1 into the drum 5.

The drum 5 has a rotating drum front part 5b (hereinafter referred to as front part 5b) provided with an opening 5a, and a rotating drum body part 5c having a bottomed cylindrical body part [hereinafter, Trunk portion 5c] and a rotating drum bottom portion 5d (hereinafter referred to as bottom portion 5d) that constitutes a bottom portion. The trunk portion 5c is provided with a large number of small holes 5g for water removal. Moreover, the some stirring protrusion 5e is provided in the inner surface of the trunk | drum 5c. The drive motor 7 (hereinafter referred to as the motor 7) is attached to the outside of the drip tank main body bottom 2c (hereinafter referred to as the bottom 2c) of the tank body 2. Then, the drum 5 is driven to rotate by the motor 7. The rotational speed of the drum 5 and the rotational direction of right and left are variably controlled.

One end of the first feed water hose 10a is connected to the first feed water valve 9 (hereinafter referred to as the valve 9). The other end of the 1st water supply hose 10a is connected to the water injection detention part 10b. The valve 9 constitutes a first water supply. The water pouring inlet 10b is opened in a slit shape so that the water to be poured is pumped into the drum 5 while being substantially spread in the horizontal direction. As a result, the water fed from the water injection detention section 10b is poured into the drum 5.

One end of the second feed water hose 13a is connected to the second feed water valve 11 (hereinafter referred to as the valve 11). The other end of the 2nd water supply hose 13a is connected to the detergent case 13c which accommodates the detergent 13b. The valve 11 constitutes a second water supply portion. Furthermore, one end of the third water supply hose 13d is connected to the lower part of the detergent case 13c. The other end of the third water supply hose 13d is connected to the water tank 6 to supply water into which the detergent 13b is mixed into the water tank 6.

On the upper surface of the detergent case 13c, a plurality of water jet holes 13e are provided. The water injection hole 13e is provided for watering the water supplied by the second water supply hose 13a in a shower shape in the detergent case 13c. The shower-shaped water from the water injection hole 13e falls on the detergent 13b and flows into the water tank 6 with the detergent 13b.

Moreover, the discharge port 34 is formed below the water tank 6 near the opening part 3a. The discharge port 34 is arranged to discharge the circulating water into the drum 5 and the water tank 6. A drain valve 43 is provided in the middle of the drain pipe passage 42. The wash water flowing into the water tank 6 is drained to the outside of the water tank 6 through the drain pipe 42 by opening the drain valve 43 at the time of drainage.

It is a block diagram which shows the structure of the control apparatus used for the drum type washing machine in embodiment of this invention. 2, the control apparatus 15 is comprised by the control part 16, the setting part 17, the memory | storage part 18, and the power switching part 19. As shown in FIG.

When the power switch 44 is turned "on", commercial power supply such as 100V is supplied to the drum type washing machine 50. The electric power is supplied to the control apparatus 15, and the control apparatus 15 starts an operation. In addition, the control unit 16 configured by the microcomputer uses the control program stored in the storage unit 18 in accordance with the setting input such as the selection of the driving course input from the setting unit 17 or the power switching unit ( The control command is output to 19). The power switching unit 19 is configured using a switching element such as an SCR (thyristor). The power switching unit 19 controls the operations of the motor 7, the valve 9, the valve 11, the drain valve 43, and the like according to the control command from the control unit 16.

The motor 7 is composed of, for example, a DC brushless motor or the like, and the forward and reverse rotation and the rotational speed are variably controlled by the controller 16 and the power switching unit 19. Furthermore, according to the quantity of laundry, the quantity detection part 12 which detects the quantity of laundry from the load change which the motor 7 receives is provided. In addition, a water level detector 14 for detecting the water level of the wash water in the water tank 6 is provided. The control apparatus 15 performs these, control of the motor 7, etc., control of the quantity detection part 12, control of the water level detection part 14, etc. Moreover, the control apparatus 15 controls the series of operation | movement operation | movement from a washing | cleaning stroke to a dehydration stroke.

It is a perspective view of the drip tank body used for the drum type washing machine in embodiment of this invention. It is a perspective view of the trough cover used for the drum type washing machine in embodiment of this invention. 3 is a perspective view when the water tank main body 2 is seen from the front 1b side of the main body 1, and FIG. 4 is a perspective view when the cover is seen from the back 1c side of the main body 1. Shows. Hereinafter, the structure of a circulation channel is demonstrated using FIG. 3 and FIG.

In FIG. 3, the water tank main body 2 is a water tank main opening 2a (henceforth opening 2a), and a water tank main body 2b (henceforth a trunk 2b). And a bottomed cylindrical shape having a drip tank body bottom 2c (hereinafter referred to as bottom 2c).

In the vicinity of the boundary between the bottom portion 2c and the trunk portion 2b on the inner surface of the bottom portion 2c, a drip tank body bottom groove portion 2d (hereinafter referred to as groove portion 2d) formed in a substantially concave shape is formed. It is provided in the arc shape of substantially concentric circles with the trunk | drum 2b. In the groove portion 2d, a drip tank body groove cover 23 (hereinafter referred to as a cover 23) having a shape corresponding to the groove portion 2d from the inner surface side is provided in the vicinity of the outer circumference of the groove portion 2d. It is fixed via (24). The lid 23 is screwed and fixed using the screw 25 which fixes the outer peripheral part of the lid 23. And the 1st circulation channel 22 (henceforth a channel 22) is formed of the groove part 2d and the cover 23. As shown in FIG.

A water intake port 20 is formed at one end of the water channel 22, and the bottom surface of the water intake port 20 communicates with the guide concave portion 21 gradually changing from the bottom surface of the groove portion 2d to the inner surface of the bottom portion 2c. have. In addition, in the tank main body 2, the pipe-shaped 2nd circulation channel 26 (henceforth a channel 26) which communicates from the opening part 2a to the bottom part 2c outside the trunk part 2b. ] Is integrally formed. An end portion at the bottom 2c side of the waterway 26 communicates with the other end portion of the waterway 22.

Next, the structure of the drip tank cover 3 is demonstrated using FIG.

In FIG. 4, the cover 3 includes a drip tank cover front part 3b (hereinafter referred to as a front part 3b) provided with an opening 3a, and a drip cover body 3c (hereinafter, a trunk). It is formed in a substantially cylindrical shape having a portion 3c] and a drip-cover cover rear opening 3d (hereinafter referred to as opening 3d).

The cover 3 has a third circulation channel 27 (hereinafter referred to as a channel 27) communicating from the opening portion 3d to the front portion 3b at a position corresponding to the channel 26 outside of the trunk portion 3c. ) Is integrally formed.

On the inner surface of the front part 3b, the drip-cover cover front groove part 3e (henceforth groove part 3e) formed in the substantially concave shape approaches the opening part 3a from the outer peripheral side of the front part 3b. It is provided in the shape of the substantially Y-shape which is divided into two at the middle. The drip-cover cover groove cover 29 (henceforth the cover 29) of the shape corresponding to the shape of the groove part 3e is being fixed to the groove part 3e from the inner surface side of the groove part 3e. The lid 29 is screwed and fixed to the outer circumferential portion of the lid 29 by a screw 31 via a third packing member 30 provided near the outer circumference of the lid 29. By the groove part 3e and the cover 29, the substantially Y-shaped 4th circulation channel 28 (henceforth a channel 28) is formed.

One end portion, which is a substantially Y-shaped lower end portion of the waterway 28, communicates with an end portion of the front portion 3b side of the waterway 27. The lid 29 is provided with a discharge port 34 for discharging the washing water in the vicinity of the tip portion separated into two branches.

With this structure, as shown in FIG. 1, the discharge port 34 is disposed to face the opening 5a in the vicinity of the outer circumference of the opening 3a and on the inner surface side of the front part 3b.

In addition, in the state where the water tank main body 2 and the cover 3 are connected and fixed to the main body 1 as the water tank 6, the discharge port 34 is located in the lower half part of the front part 3b, It is provided so that it may become a position lower than the intake opening 20.

In addition, when the water tank main body 2 and the cover 3 are connected and fixed, the water channel 26 and the water channel 27 are made in the same way as the method of connecting and fixing the water tank main body 2 and the cover 3 mentioned above. 1 It is watertightly connected and fixed through the packing member 4.

It is a top view of the rotary drum bottom part used for the drum type washing machine in embodiment of this invention. It is a longitudinal cross-sectional view of the principal part of the rotating drum used for the drum type washing machine in embodiment of this invention. 5 shows the top view of the rotating drum bottom part 5d when it sees from the arrow A direction in FIG.

Hereinafter, the structure of the rotating drum which achieves the pump function which circulates wash water to a circulation channel using FIG. 5 and FIG. 6 is demonstrated.

The bottom part 5d is formed in substantially concave shape by providing the flange part 5f which protrudes outward in the outer periphery of the bottom part 5d. The rear end portion of the trunk portion 5c and the flange portion 5f are connected by caulking or welding. Moreover, the drum fixing member 35 (henceforth a member 35) made from the aluminum die-casting which has three extension parts 35a is provided. The extended part 35a is provided radially inside 5 f of flange parts of the outer surface side of the bottom part 5d. Moreover, between each extension part 35a, three substantially circular box-shaped rib attachment members 37 (henceforth a member 37) provided so that the outer periphery of the bottom part 5d may be provided are provided.

On the outer periphery of the member 37, the convex outer wall 40 and the inner wall 41 are provided toward the rear, respectively. Thereby, the member 37 is formed in substantially concave shape. Moreover, in the inside of the member 37, a plurality of ribs 38 connecting the outer wall 40 and the inner wall 41 are formed radially toward the outer circumferential side at substantially the same height as the outer wall 40 and the inner wall 41. It is. The member 35 is fixed to the drum 5 from the outer circumferential direction by the screw 39b, as shown in FIG. Moreover, the member 35 is fixed to the fixing part 38a of the member 37 from the planar direction by the screw 39a. Thereby, the member 35 is fixed to the drum 5 and the member 37, respectively. Furthermore, the shaft 7a extending from the motor 7 and the central portion of the member 35 are connected, thereby transmitting the rotational driving force of the motor 7 to the drum 5.

The operation and action of the drum type washing machine 50 configured as described above will be described below.

The control unit 16 rotates the drum 5 at a first predetermined rotational speed by driving the motor 7 in the washing stroke or the rinsing stroke. The first predetermined rotational speed is set to a rotational speed such that the laundry adheres to the inner circumferential surface 5h of the drum 5 by the centrifugal force generated by the rotation of the drum 5. Here, the first predetermined rotational speed is 80 r / min, for example. By rotation of the drum 5, the wash water is agitated by the movement of the pump blades of the ribs 38. Moreover, the water flow as shown by the arrow C of FIG. 6 arises by the movement of the pump blade of the rib 38. FIG. Furthermore, the wash water rotates around the boundary region between the trunk portion 2b and the bottom portion 2c, is led to the guide recess 21, and is introduced into the water intake port 20. In addition, the wash water is discharged lively from the discharge port 34 into the drum 5 through the channels 22, 26, 27, 28. In addition, the discharge port 34 is configured at a position lower than the water intake port 20.

Moreover, in the shower rinse stroke which is one stroke of a rinse stroke, the rotation speed of the drum 5 rotates the drum 5 at a 1st predetermined rotation speed. The laundry in the drum 5 adheres to the inner circumferential surface 5h by the centrifugal force generated by the rotation of the drum 5. For this reason, the wash water circulated through the channels 22, 26, 27, and 28 is poured into the laundry at each rotation of the drum 5. Centrifugal force is used to wash the wash water into the laundry, so that the wash water effectively penetrates into the laundry. In this way, the rinsing operation of the shower rinsing stroke is performed to effectively remove the detergent from the laundry.

Moreover, in the stirring rinsing stroke which is one stroke of a rinsing stroke, the rotational speed of the drum 5 rotates the drum 5 at a 2nd predetermined rotational speed. The second predetermined rotational speed is a speed equal to or less than the first predetermined rotational speed, and is controlled at 45 r / min, for example. As the drum 5 is rotated at the second predetermined rotational speed, the gravity of the laundry is larger than that of the laundry by the centrifugal force. Moreover, the stirring power of the washing water is low, and the amount of discharged water of the washing water from the discharge port 34 is extremely small or there is no discharge amount. As a result, the rinsing operation is the same operation as tapping washing in which the laundry falls from above the washing water toward the upper surface of the washing water. As a result, while the laundry is released, the rinsing operation of the stirring rinsing stroke is executed, and the effective rinsing is performed.

By combining the shower rinse stroke and the stirring rinse stroke described above, a more effective rinsing effect can be obtained. That is, in the shower rinse stroke, an operation in which the detergent in the laundry is penetrated and removed by the shower is performed. Furthermore, in the stirring rinse stroke, while the tangled laundry is released, the stirring operation in which the detergent present in the laundry is dissolved by the washing water and removed is performed. In addition, the washing water is sprinkled on the laundry and circulated. As a result, the wash water contained in the laundry and the wash water inside and outside the drum 5 are actively circulated. As a result, the washing | cleaning power and the rinsing performance improve, and the drum type washing machine 50 with little rinsing nonuniformity is provided.

7A and 7B are flowcharts showing a rinsing stroke of the drum type washing machine in the embodiment of the present invention. Hereinafter, a rinse stroke is demonstrated using FIG. 7A and FIG. 7B. In addition, the flowchart shown in FIG. 7B is performed following the flowchart shown in FIG. 7A.

First, in step S100, when a touch panel (not shown) is operated to input the start of the rinsing operation, the control unit 16 reads the control program from the storage unit 18, The control operation is executed by the following steps.

In step S101, the washing water including the detergent collected in the water tank 6 is drained during the washing stroke or the like before the rinsing stroke. Next, in step S102, the drum 5 is reversed left and right or stopped on the condition of the second predetermined rotational speed. As a result, the laundry entangled in the drum 5 is released. So-called cloth loosening agitation is performed. The second predetermined rotational speed is a rotational speed at which the laundry does not stick to the inner circumferential surface 5h of the drum 5, for example, about 45r / min.

Next, in step S103, a voltage is applied to the motor 7 on the condition that the rotational speed of the drum 5 is maintained at the fifth predetermined rotational speed. Here, the fifth predetermined rotational speed is a speed equivalent to the first predetermined rotational speed, for example, about 80 r / min. In the state in which the drum 5 is rotated at the fifth predetermined rotational speed, in step S104, the variation in the rotational speed of the drum 5 is measured to determine whether the balance state of rotation of the drum 5 is good or bad. When it is determined that the balance state is good, the flow proceeds to the next intermediate dewatering stroke step S105. In addition, when it is determined that the balance state is bad, the rotation of the drum 5 is stopped, the foaming stirring stroke of step S102 is returned, and the foaming stirring stroke is executed again. By performing the unfolding stirring stroke again, the laundry is entangled, and the rotational balance state of the drum 5 is improved.

Next, in step S105, the drum 5 is gradually accelerated to a third predetermined rotational speed. The third predetermined rotational speed is 900 r / min, for example. By rotating the drum 5 at high speed, centrifugal force dehydration is performed and washing water is drained from the water tank 6. In addition, by step S105, the washing water including a large amount of detergent contained in the laundry is removed from the laundry before the rinsing stroke. Moreover, wash water containing a large amount of detergent is drained from the drum 5.

Next, in step S106, the rotation of the drum 5 is braked, and the rotation of the drum 5 is stopped. Next, in step S107, the drum 5 rotates to the right (in the direction of the arrow B shown in FIG. 3) and is gradually accelerated to about the first predetermined rotational speed. The first predetermined rotational speed is a rotational speed at which the laundry adheres to the inner circumferential surface 5h by the centrifugal force due to the rotation of the drum 5, for example, 80 r / min. As a result, the centrifugal force becomes larger than the gravity acting on the laundry. As a result, the laundry adheres to the inner circumferential surface 5h. At this time, the variation of the voltage applied to the drive motor 7 is measured. In step S107, it is determined whether the rotational balance state of the drum 5 is good or bad. When it is determined that the balance state is good, the process proceeds to step S109 which is a shower rinse stroke. In addition, when it is determined that the balance state is bad, the rotation of the drum 5 is stopped, and the flow proceeds to step S115 of the stirring rinse stroke.

As described above, in the intermediate dewatering stroke of steps S105 and S106, by using a strong centrifugal force, the washing water including the detergent is dewatered from the laundry, and the washing water is drained from the drum 5. In the state where the laundry strongly adheres to the inner circumferential surface 5h of the drum 5, in step S107, the balance control determination is executed. Thereby, the balance control is already performed in step S103, and the state which the laundry adhered to the inner peripheral surface 5h of the drum 5 is hold | maintained. Therefore, it is possible to accelerate gradually to a 1st predetermined rotation speed as it is in this state. Therefore, it is unnecessary to return the balance back to the original state, and the time for the rinsing stroke can be shortened.

Next, in step S109, the rotational speed is maintained at the first predetermined rotational speed while the rotational balance of the drum 5 is good. The first predetermined rotational speed is a speed equivalent to the fifth predetermined rotational speed, for example, 80 r / min.

Next, in step S110, water supply of the washing water is started from the valve 9 or the valve 11 into the water tank 6. When the wash water supplied to the water tank 6 reaches a certain level, the wash water is lifted by the ribs 38. Thereby, the wash water rotates in the vicinity of the boundary region between the trunk portion 2b and the bottom portion 2c. And wash water is guided to the guide recess 21 provided in the bottom part 2c, and is put into the intake port 20. FIG. Further, the wash water is discharged from the discharge port 34 into the drum 5 through the channels 22, 26, 27, 28. As a result, a large amount of washing water circulates in the drum 5. In step S110, after the start of the water supply, the washing rinsing stroke is continued with the water supply while the washing water reaches the first predetermined water level (step S111).

In addition, while step S111 is repeated from step S109, and while the drum rotation and water supply are performed, the level of the washing water in the water tank 6 gradually increases, the shower discharged from the discharge port 34 into the drum 5 is performed. The momentum keeps getting stronger. In this way, the washing water is sprayed on the laundry in a wide range. If the wash water reaches the first predetermined water level, the flow advances to the next step S112.

Next, in step S112, the rotation speed of the drum 5 is raised from the first predetermined rotation speed to the fourth predetermined rotation speed. The fourth predetermined rotational speed is higher than the first predetermined rotational speed and is, for example, 170 r / min. Moreover, a 4th predetermined rotation speed is a high rotation speed also compared with a 5th predetermined rotation speed. Moreover, the rotation direction of the drum 5 is rotated by the right turn shown by the arrow B of FIG. As the drum 5 is rotated under the condition of the fourth predetermined rotational speed at high speed, the washing water in the water tank 6 is circulated at high speed. Thereby, the shower which has stronger momentum than the laundry in step S110 is brought into contact with the laundry. When such a strong shower is in contact, the stroke in which the laundry is rinsed is the shower rinse stroke. The shower rinse stroke continues until the first predetermined time elapses. In addition, a 1st predetermined time is 5 minutes, for example. In addition, it is determined in step S113 whether the first predetermined time has elapsed. After the first predetermined time has elapsed, the process proceeds to step S114 where the rotation of the drum 5 is stopped.

In step S112, the rotation speed of the drum 5 is high. For this reason, the number of showers discharged from the discharge port 34 into the drum 5 is large, and the centrifugal force is also large. Thereby, the force which removes a detergent from the laundry using centrifugal force is also large. As a result, a high rinsing effect can be obtained.

Next, in step S115, the washing water is further supplied from the valve 9 to the second predetermined level, which is a level higher than the first predetermined level in the drum 5. If it is determined in step S116 that the water is supplied to the second predetermined water level, the flow advances to the next step S117.

In step S117, the drum 5 is repeatedly rotated in order of right turn, rest, left turn and rest by the second predetermined rotation speed under the condition of the second predetermined rotation speed. Further, the second predetermined rotational speed can lift the laundry contained in the drum 5 in the rotational direction by the rotation of the drum 5. Furthermore, when the laundry moves to a position where the weight of the laundry becomes higher than the inertia or centrifugal force acting on the laundry according to the rotation of the drum 5, the laundry is moved to gravity on the lower inner peripheral surface 5j of the drum 5. It is the rotation speed falling by. As the rotational speed of this drum 5, the second predetermined rotational speed is, for example, 45 r / min. In addition, a right turn is a rotation in the direction of arrow B shown in FIG. 3, and a left turn is a rotation of the opposite direction to the arrow B shown in FIG. Stirring and rinsing are performed by repeatedly performing the right turn, the stop, the left turn, the rotation and the stop operation of the drum 5 in step S117 sequentially. The stirring rinsing operation is continued until the second predetermined time elapses. Moreover, a 2nd predetermined time is 12 minutes, for example. In addition, it is determined in step S118 whether the second predetermined time has elapsed. After the second predetermined time has elapsed, the process proceeds to step S119 and the rinsing stroke is completed. Step S115 to step S118 are stirring rinsing strokes. When the rinse stroke is completed, the dewatering stroke is executed.

Moreover, in the stirring rinse stroke, the quantity of wash water is set so that more water may be supplied than the shower rinse stroke. As a result, the laundry falls toward the large amount of wash water stored in the drum 5. For this reason, high rinsing effect can be acquired, with the entanglement of laundry being removed.

As described above, by combining the shower rinse stroke and the stirring rinse stroke, an effective rinsing effect without rinsing nonuniformity can be obtained. That is, in the shower rinse stroke, the detergent in the laundry is effectively penetrated and removed by the shower. Furthermore, in the stirring rinse stroke, the tangled laundry is released while the tangled laundry is released. As a result, the detergent is dissolved in the wash water and removed from the laundry.

In addition, in this embodiment, after a stirring rinse stroke, the rinse stroke was complete | finished and it demonstrated as a structure which does not perform a shower rinse stroke. However, depending on the type and amount of the laundry, the contamination of the laundry, the type and amount of the detergent, and the like, when the elaborate rinsing effect is to be expected, the stirring rinsing stroke and the shower rinsing stroke may be alternately performed plural times.

For example, as shown in FIG. 8, first, in step S100, the input of the start of operation of a rinse stroke is performed. Next, in step S101, the washing water including the detergent is drained. Next, in step S201, an intermediate dewatering stroke is executed. Next, in step S202, a balance stroke is executed. Next, in step S203, the shower rinse stroke is executed, and in step S204, the stirring rinse stroke is executed. Further, in step S205, it is determined whether or not the rinse stroke is to be ended, and when the rinse stroke is finished, the rinse stroke is terminated (step S119). When the rinse stroke is not finished, the shower rinse stroke and the stirring rinse stroke are executed again in steps S203 and S204. In addition, the shower rinse stroke and the stirring rinse stroke do not necessarily need to be executed again, and only the shower rinse stroke may be executed again. In addition, only the stirring rinse step may be executed again.

In addition, the rinsing stroke shown in steps S100 to S119 may be repeatedly executed a plurality of times depending on the amount, type, and the like of the laundry. In this case, after the rinsing stroke shown in steps S100 to S119 is repeatedly executed a plurality of times, the dewatering stroke is controlled to be executed.

Moreover, in this embodiment, in the shower rinse stroke, it was set as the structure which can raise the rotation speed of the drum 5 from a 1st predetermined rotation speed to a 4th predetermined rotation speed. However, depending on the kind, quantity, etc. of the laundry, the rotational speed may not be increased from the first predetermined rotational speed to the fourth predetermined rotational speed, in particular, when no elaborate rinsing effect is required. That is, in the shower rinse stroke, the rotational drive of the drum 5 under the condition of the first predetermined rotational speed may be continued.

In addition, the shape of the rib 38 is not limited to the shape demonstrated by this embodiment. In this embodiment, the structure which circulates wash water by the action of the rib 38 as the drum 5 rotates was demonstrated. However, the rib 38 is not necessarily required if, for example, a separate configuration allows the wash water to be circulated by the rotation of the drum 5.

In addition, the intake port 20, the channel 22, 26, 27, 28, and the discharge port 34 are not limited to the structure demonstrated by this embodiment. The water intake port 20 should just be a structure which the wash water in the water tank 6 can be put into. In addition, the channel 22, 26, 27, 28 should just be a structure which can circulate the wash water thrown in from the water intake port 20 to the discharge port 34. As shown in FIG. In addition, the discharge port 34 may be any structure capable of discharging the washing water fed from the water intake port 20 into the drum 5.

Moreover, the drum type washing machine 50 comprised so that the rotating shaft of the drum 5 may incline downward from the front side 1b side of the main body 1 toward the back side 1c side was demonstrated. However, the rotating shaft of the drum 5 may not necessarily be a configuration inclined downward from the front face 1b side of the main body 1 toward the rear face 1c side. For example, even if the rotating shaft of the drum 5 is a horizontal axis, the above operation and effect are exhibited in the same manner as the configuration inclined downward.

As described above, since the drum type washing machine according to the present invention can perform circulating shower rinsing without using a circulation pump, it is possible to improve cleaning power and rinsing performance and to reduce rinsing unevenness. Thereby, it is not only limited to a washing machine but it is widely applied also to the various apparatuses and apparatus which perform cleaning, rotating a rotating drum.

Claims (10)

A bottomed cylindrical drip tray enclosed in the washing machine body and having a first opening for laundry entry, A cylindrical rotary drum having a bottom rotatably embedded in the drip tank, the second opening being opened corresponding to the first opening, a rotating shaft inclined from the horizontal direction or the horizontal direction, and an inner peripheral surface; A motor for rotationally driving the rotary drum; A water supply unit for supplying wash water to the drip tank; An intake port provided in the drip tank and for putting the washing water rotating in the drip tank according to the rotation of the rotary drum; A circulation channel having one end communicating with the intake port, A discharge port communicating with the other end of the circulation channel, for discharging the washing water put into the water intake port into the rotary drum; A control unit for controlling the motor and the water supply unit to execute a washing stroke, a rinsing stroke, and a dehydration stroke; The rinse stroke, Rotating the rotating drum at a first predetermined rotational speed, thereby causing the laundry to adhere to the inner circumferential surface by centrifugal force, and simultaneously discharging the washing water from the discharge port into the rotating drum; By rotating the rotary drum at a second predetermined rotational speed lower than the first predetermined rotational speed, the laundry is lifted in the rotational direction by the rotation of the rotary drum and dropped from a predetermined height, and the shower is discharged from the discharge port. Comprising a stirring rinse stroke by either discharging a smaller amount of washing water than the rinsing stroke or not discharging the washing water. Drum Washing Machine. The method of claim 1, The control unit rotates the rotary drum at a third predetermined rotational speed of high-speed rotation, dehydrates it, and then controls to execute the rinsing stroke, while the laundry adheres to the inner circumferential surface by the centrifugal force at the time of dehydration. And rotating the rotary drum at the first predetermined rotational speed and starting water supply into the drip tank. Drum Washing Machine. The method according to claim 1 or 2, In the rinsing step, the control unit controls the water supply unit to supply water to the drip tank to a predetermined level, and then rotates the rotary drum at a fourth predetermined rotational speed higher than the first predetermined rotational speed, thereby rinsing the shower. To run Drum Washing Machine. The method according to claim 1 or 2, The control unit alternately performs the shower rinse stroke and the stirring rinse stroke in the rinsing stroke. Drum Washing Machine. The method of claim 3, wherein The control unit alternately performs the shower rinse stroke and the stirring rinse stroke in the rinsing stroke. Drum Washing Machine. A drip tray enclosed in the washing machine body, a rotary drum rotatably embedded in the drip tank, accommodating laundry and washing water, a motor for rotationally driving the rotary drum, and a water supply unit for supplying washing water in the drip tank; A circulation port for discharging the washing water from the rotary drum, a discharge port for discharging the washing water introduced from the water intake port into the rotary drum, and one end communicating with the water intake port, and the other end communicating with the discharge port In the washing method of a drum type washing machine provided with a water channel, and a control part which controls the said motor and the said water supply part, Rotating the rotary drum at a first predetermined rotational speed, thereby causing the laundry to adhere to the inner circumferential surface of the rotary drum by centrifugal force and simultaneously discharging the washing water from the discharge port into the rotary drum; By rotating the rotary drum at a second predetermined rotational speed lower than the first predetermined rotational speed, the laundry is lifted in the rotational direction by the rotation of the rotary drum, dropped from a predetermined height, and rinsed the shower from the discharge port. Equipped with a stirring rinse stroke by any one of discharging a smaller amount of washing water than a stroke or not discharging the washing water. How to wash drum washing machine. The method of claim 6, By rotating the rotating drum at a third predetermined rotational speed higher than the first predetermined rotational speed, the laundry adheres to the inner circumferential surface of the rotating drum by centrifugal force and dehydrates the wash water contained in the laundry. Further with intermediate dewatering stroke, The shower rinse stroke is executed after the intermediate dewatering stroke, and in the intermediate dewatering stroke, the rotary drum is rotated in the first predetermined rotational speed in the shower rinsing stroke while the laundry adheres to the inner circumferential surface. To start the water supply into the drip tank How to wash drum washing machine. The method according to claim 6 or 7, The shower rinse stroke causes the rotary drum to rotate at a fourth predetermined rotational speed higher than the first predetermined rotational speed after supplying water to the water level in the drip tank. How to wash drum washing machine. The method according to claim 6 or 7, In the washing method of the drum type washing machine, the shower rinse stroke and the stirring rinse stroke are alternately performed. How to wash drum washing machine. The method of claim 8, In the washing method of the drum type washing machine, the shower rinse stroke and the stirring rinse stroke are alternately performed. How to wash drum washing machine.

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