JP2005124764A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine which can facilitate the loading/unloading of laundry to/from a rotating drum. <P>SOLUTION: The loading/unloading work of laundry by opening a door body 8 can be performed without bending the back by arranging the rotating drum 5 in a manner to be tilted in a water tub 3. By arranging the rotating drum 5 in a manner to be tilted, the offset of the laundry to the bottom side is solved by an agitation controlling motion for which the stopping of the rotation driving for a specified period of time after rotating the rotating drum 5 for a specified period of time at a specified rotating speed is repeated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drum-type washing machine for washing laundry stored in a rotating drum by rotationally driving a rotating drum disposed in a water tank.

  An example of a conventional structure of a drum type washing machine is shown in FIG. As shown in the figure, a rotating drum 51 having a large number of through holes 52 formed in the peripheral surface is disposed in a water tub 53 supported by a suspension structure in a washing machine casing 57. The rotating drum 51 is a drum drive motor 55. The laundry is driven from the inside of the rotating drum 51 through the front opening of the water tank 53 and the front opening of the rotating drum 51 by opening the door body 54 that is rotationally driven by the door and provided to be openable and closable on the front side of the washing machine casing 57. It is configured so that it can be taken in and out.

  When the door body 54 is opened, laundry is put into the rotating drum 51, and detergent is added to start the operation, water is supplied into the water tank 53, and the supplied water passes through the through-hole 52 and the rotating drum 51. The required amount of water is also supplied. When the rotary drum 51 is rotationally driven by the drum drive motor 55 at a predetermined rotational speed, the laundry stored in the rotary drum 51 is hooked on the stirring protrusion 56 provided on the inner peripheral surface of the rotary drum 51 and rotated in the rotational direction. When the laundry is lifted and dropped from an appropriate height, washing is performed by applying a tapping wash action to the laundry. After this washing process, the dirty washing water is drained, and the rinsing process is performed using newly supplied water. When the rinsing process is completed, the rotating drum 51 is rotated at a high speed, and the dehydrating process is performed. These steps are automatically executed based on a predetermined control procedure.

The above configuration is a general configuration of a drum-type washing machine, and in addition to the above configuration, water stored in the water tub is supplied into the rotating drum in order to improve the washing performance, thereby sufficiently supplying water to the laundry. Numerous proposals have been made, such as a drum-type washing machine provided with a structure for absorbing water (see Patent Document 1) and a drum-type washing / drying machine having a function of blowing warm air into a rotating drum to dry laundry.
JP 09-215893 (pages 3 to 5, FIG. 1)

  The drum-type washing machine has a mainstream form in Europe and America because it uses less water and less damages the laundry than a vertical washing machine that rotates by rotating the pulsator. However, because the laundry doorway is sideways, it is difficult to do the work that needs to bend down when putting laundry in and out of the rotating drum, and there is a need for a space before the doorway. It has been considered unsuitable for a small living environment. In order to solve the problems of the drum-type washing machine, a drum-type washing machine has been developed in which a rotating drum is arranged obliquely and an opening for taking in and out the laundry is obliquely upward so that the laundry can be taken in and out easily. However, when the rotating drum is rotated at the same rotational speed as the drum-type washing machine in which the rotating drum is arranged in the horizontal direction as in the above-described conventional configuration, the laundry sticks to the back side of the rotating drum and is lifted upward and downward There was a problem that the action of tapping by dropping into the surface was not sufficient, and the required cleaning performance could not be obtained.

  That is, when the rotating drum is arranged obliquely, the work of putting in and out the laundry becomes easy, but the laundry gathers on the inclined bottom side of the rotating drum, and the rotation of the rotating drum moves the laundry to the bottom side. Therefore, there is a problem that the laundry is deposited only on the bottom side and sufficient cleaning properties cannot be obtained. This problem becomes more prominent as the tilt angle of the rotating drum is increased. Therefore, if priority is given to the function of facilitating the work of putting the laundry in and out of the rotating drum by increasing the inclination angle, the function of tapping, which is a cleaning action peculiar to the drum type washing machine, is lowered, and the most important cleaning performance is obtained. It cannot be obtained sufficiently.

  The purpose of the present invention is to make it easy to carry out and take out the laundry by tilting the rotating drum formed in a cylindrical shape, and to prevent the laundry from being collected only at a low position. It is an object of the present invention to provide a drum type washing machine that solves the problem by stirring control and has an equal detergency on all laundry.

  In order to achieve the above object, a drum type washing machine according to the present invention has a rotating drum formed in a bottomed cylindrical shape with a rotation axis direction of 30 from the horizontal direction from the front side opening to the back side as the bottom. It is arranged in the water tank so as to have a downward inclination of ± 5 degrees, and at least one of the washing step and the rinsing step, the laundry lifted upward by the rotation of the rotating drum wins its own weight. After the rotary drum is rotationally driven for a first predetermined time at a first predetermined rotational speed showing the behavior of falling from the height position, the control operation for stopping the rotational drive of the rotary drum for a second predetermined time is the first required time. The first agitation control that is repeated is executed.

  According to the above configuration, since the bottomed cylindrical rotating drum is inclined, the opening located on the front side of the rotating drum is directed obliquely upward to the front of the washing machine and The work of putting in and out the laundry becomes easy. The rotation angle of the rotating drum is approximately 30 ± 5 degrees, so that people with disabilities who use wheelchairs can easily put in and out laundry regardless of the height difference of people using the drum-type washing machine. It is a set angle. Therefore, it is not necessary to bend down to put laundry in and out of the drum type washing machine, and it becomes possible to install the drum type washing machine in a narrow space. It will be possible to take advantage of the excellent characteristics of the washing machine. On the other hand, the problem that the laundry is biased toward the bottom side of the rotating drum due to the inclined arrangement of the rotating drum and the sufficient stirring action is not performed is that the stirring control is executed in the washing step and / or the rinsing step. The position of the laundry that tends to be biased to a lower position due to the inclination is changed, and it becomes possible to give a uniform cleaning power to all the laundry.

  In the above-described configuration, it is possible to perform washing while exchanging the position of the laundry while suppressing the occurrence of twist in the laundry by alternately executing the rotational drive in the forward and reverse directions.

  Further, when the diameter of the rotating drum is 500 ± 50 mm and the rotating drum is rotated at a rotating speed of 30 ± 5 r / min, the laundry contacting the drum inner peripheral surface is lifted, If it moves to a height position where its own weight prevails, it shows a behavior of falling by its own weight, so that the position of the position is changed and at the same time the action of tapping is performed. If the rotational speed is lower than the specific value, the laundry does not lift, and if it is high, the effect of centrifugal force increases even if it is lifted, so that it does not fall.

  Since the rotational speed for moving the position of the laundry is affected by the amount of laundry, the amount of laundry stored in the rotating drum is detected by the laundry amount detection means, and the amount of laundry larger than a predetermined amount set in advance. Is detected, the first predetermined number of revolutions of the rotating drum is controlled to be 25 to 30 r / min, and when the amount of laundry smaller than a predetermined amount is detected, the first predetermined number of the rotating drum is detected. When the rotational speed is controlled to be 30 to 35 r / min, the action of tapping can be obtained simultaneously with the replacement of the position corresponding to the amount of laundry.

  In addition, in at least one of the washing process and the rinsing process, the rotating drum is moved to the third predetermined speed at a second predetermined rotation speed at which the laundry is attached to the inner peripheral surface of the rotating drum by the rotation of the rotating drum. After performing the time rotation drive, by executing the second agitation control that repeats the control operation for stopping the rotation drive of the rotary drum for the fourth predetermined time for the second required time, the rotation speed at which the centrifugal force acts on the laundry is obtained. When the rotating drum is rotated, the laundry is stuck and spread on the inner surface of the drum, and when the rotational drive is stopped, the laundry falls, so that the shape changes in addition to the movement of the position, and the position is lowered. Laundry that tends to set can be dispersed in the rotating drum.

  Also, by executing the first agitation control and the second agitation control alternately for the required time, the position of the laundry and the change of the shape are developed in various ways, so that even laundry is evenly washed. It is possible to apply force, eliminate the adverse effects caused by the inclined arrangement of the rotating drum, and make good use of workability.

  In addition, by providing a plurality of stirring protrusions at the inner peripheral surface of the rotating drum, each having a top portion formed long in a predetermined inclination angle direction from the rotation axis direction of the rotating drum, when the rotating drum rotates, the stirring protrusion Since the laundry is moved in a direction different from the rotation direction of the rotating drum at the inclination angle of the top, if the top is formed at an inclination angle that allows the laundry to move from the lower side to the upper side of the rotating drum, the rotating drum The action of dispersing the laundry that tends to gather on the lower side of the inside of the rotating drum is more effective.

  According to the present invention, the rotating drum is inclined at an angle of approximately 30 ± 5 degrees, so that it is possible to put in and out the laundry with a low degree of crouching while being a drum-type washing machine, such as a toilet. The effect that a drum type washing machine can be installed in a narrow space is obtained. On the other hand, the problem that the laundry is biased to a low position as the rotary drum is tilted is that the rotation drum is replaced by the laundry that is biased to a low position by performing the required stirring control operation. It is possible to improve the workability of putting in and out the laundry while maintaining the excellent washing performance of the drum type washing machine.

  FIG. 1 shows a configuration of a main part of a drum-type washing machine 1 according to an embodiment. A water tank 3 is supported in a washing machine housing 2 by a suspension structure (not shown), and the water tank 3 has a bottomed cylindrical shape. The rotating drum 5 formed in the above is arranged so that the rotation axis direction R is inclined from the horizontal direction H by an angle θ = 30 ± 5 degrees.

  The rotary drum 5 has a bottomed cylindrical opening side on the front side of the washing machine casing 2 and a bottom side on the back side of the washing machine casing 2 so that the rotation axis direction R is directed from the front side to the back side. Are arranged in the water tank 3 so as to be inclined downward at an angle θ, and are rotationally driven by a drum drive motor 4 attached to the back surface of the water tank 3. On the front side of the aquarium 3, an opening 3a for taking in and out the laundry from the rotary drum 5 is formed, and an inclined surface 2a formed on the front side of the washing machine casing 2 is opposed to the opening 3a. Is provided with a door 8 that can be freely opened and closed. Laundry can be taken in and out of the rotating drum 5 by opening the door body 8, and the inside of the rotating drum 5 is seen through from the outside by forming a part or the whole of the door body 8 with a transparent body. Can do.

  As described above, the rotary drum 5 is inclined, and the door body 8 is provided in the washing machine casing 2 so as to face the opening, thereby opening the door body 8 and putting laundry into and out of the rotary drum 5. It is not necessary to bend down at the time of the work to be performed, and it is not necessary to secure a sufficient space in front of the drum type washing machine 1, and it is narrow such as a toilet where a conventional vertical washing machine is installed. The drum type washing machine 1 can be installed in a space, and the drum type washing machine 1 can be configured to be suitable for a small Japanese living environment.

  As a result of various investigations and studies by the inventors of the present application, the conclusion that θ = 30 ± 5 degrees has been obtained. Even if there is a height difference from a child (excluding infants) to an adult or a disabled person who uses a wheelchair by arranging the rotating drum 5 at an inclination angle θ = 30 ± 5 degrees, the laundry It is possible to obtain a state in which the operation of loading and unloading is most easily performed.

  Incidentally, even if the rotating drum 5 is inclined at an inclination angle θ = 30 ± 5 degrees, if the rotating drum 5 exists at an extremely high position or a low position, the set inclination angle becomes meaningless. The rotating drum 5 has a height suitable for a washing machine installed on the floor, and is inevitably determined to provide components such as a water absorption / drainage structure and an operation unit in the washing machine casing 2. Since there is a height position, the height position of the rotary drum 5 does not change significantly, and the height of the door body 8 that is disposed opposite to the front opening of the rotary drum 5 and serves as an entrance for taking in and out the laundry. The position does not go up and down extremely. In the case of the drum type washing machine 1 according to the present embodiment, the overall height is 930 mm, and the height position of the central portion of the door body 8 is 693 mm.

  When the rotating drum 5 is inclined as described above, the work of putting in and out the laundry is facilitated, and the water stored in the rotating drum 5 is accumulated on the back side, so that a deep water storage state can be obtained even with a small amount of water. On the other hand, the laundry stored in the rotating drum 5 gathers in the lower part on the bottom surface side, which is the lowest position, and if the rotating drum 5 is rotated, the laundry is further collected on the bottom surface side. There arises a problem that the operation of applying the washing power uniformly to all the laundry by exchanging the individual positions becomes incomplete. Therefore, it is necessary not only to simply place the rotating drum 5 at an angle but also to take measures to solve the above-mentioned problems. As means for solving the problem, in the present embodiment, the position of the laundry is changed by controlling the rotational drive of the rotary drum 5 by the drum drive motor 4.

  As shown in FIG. 2, the control device 10 that controls the operation of the drum type washing machine 1 controls the operation of the drum drive motor 4, the water supply valve 26, and the drainage pump 27 by the control unit 11 configured by a microcomputer. It is configured as follows. When the setting unit 13 and the display unit 14 provided on the operation panel provided on the surface of the washing machine casing 2 perform selection input of the driving course from the setting unit 13, the display unit 14 displays the selection state and the driving state. Since the control unit 11 outputs a control command corresponding to the control procedure stored in the storage unit 15 to the power switching unit 12, the drum drive motor 4, the water supply valve 26, and the drainage pump 27 correspond to the operation procedure. ON / OFF control is performed. The operation of the drum type washing machine 1 that is controlled by the control device 10 will be described below with reference to FIGS. 1, 2, and 3.

  The door body 8 is opened, the laundry is put into the rotary drum 5, the detergent is supplied from the detergent inlet provided in the water supply unit 6, the power switch 18 is turned on, and the type of the laundry is set from the setting unit 13. When the selection of the driving course corresponding to is input and the operation input for starting the operation is performed, the operation control by the control device 10 is started. The operation of the drum type washing machine 1 is basically executed in the order of the washing process, the rinsing process, and the dehydration process, and when the drying function is provided, the drying process can be arbitrarily performed.

  First, the control unit 11 outputs a control command for rotating the rotary drum 5 at a predetermined rotational speed to the drum drive motor 4 in order to detect the amount of laundry put into the rotary drum 5 to the power switching unit 12. . When the drum drive motor 4 that is ON-controlled by the power switching unit 12 rotates the rotary drum 5, the cloth amount detection unit 16 detects the amount of laundry from the load state that the drum drive motor 4 receives corresponding to the amount of laundry. Is detected. The amount of laundry detected by the cloth amount detection unit 16 is stored in the storage unit 15 for use in a control operation described later.

  Next, since the control unit 11 outputs a control command to open the water supply valve 26 to the power switching unit 12, the control unit 11 is controlled to open the water supply valve 26 by the power switching unit 12 and is supplied from the water supply hose connected to the water supply unit 6. The tap water to be supplied is supplied into the water tank 3 while mixing the detergent put in the water supply unit 6. The water level supplied to the water tank 3 is detected by a sensor portion of the water level detection unit 19 provided in the water tank 3, and when the water level reaches a specified water level, a specified water level detection signal is input from the water level detection unit 19 to the control unit 11. Therefore, the control unit 11 outputs a control command for closing the water supply valve 26 to the power switching unit 12 to stop water supply. The water supplied into the water tank 3 is absorbed by the laundry accommodated in the rotary drum 5 through the through holes 17 formed in the rotary drum 5, and the water level in the water tank 3 is lowered. The same is done. In addition, although the control operation | movement which heats the supplied water to the temperature which improves a cleaning power with the heater provided in the water tank 3 can also be performed, since it is not directly related to this invention, description is abbreviate | omitted.

  Since the washing operation can be started by the control operation, the control unit 11 outputs a control command for the rotational drive of the rotary drum 5 by the drum drive motor 4 to the power switching unit 12. A sequence for rotationally driving the rotary drum 5 is stored in the storage unit 15. FIG. 3 shows an example sequence. Hereinafter, the procedure for rotationally driving the rotary drum 5 will be described with reference to FIG. The drum drive motor 4 is configured to have a variable rotation speed and a reversible rotation direction, but a specific description thereof and a description of a control method will be omitted. Further, since the rotating drum 5 rotates at a predetermined rotational speed, the action such as centrifugal force received by the laundry accommodated therein changes depending on the diameter of the rotating drum 5, and the specific numerical values of the rotational speed shown below are as follows. It is a specific example in case the diameter of the rotating drum 5 with which the drum type washing machine 1 in this embodiment is provided is 500 mm.

  In FIG. 3, first, the rotating drum 5 is driven to rotate in the positive direction at a first predetermined rotational speed (for example, 30 ± 5 r / min) for a first predetermined time (for example, 13 seconds), and then to a second predetermined speed. A control operation is performed in which the rotational drive is stopped for a time (for example, 2 seconds), and then rotated in the reverse direction at the first predetermined rotational speed for the first predetermined time and then stopped for the second predetermined time. A first agitation control operation that repeats a first required time (for example, 4 minutes) as one cycle is executed.

  The first predetermined rotation speed is such that the laundry hooked by the stirring protrusions 9 provided at a plurality of positions on the inner peripheral surface of the rotating drum 5 is lifted in the rotating direction by the rotation of the rotating drum 5, and its own weight is caused by the centrifugal force. It is the rotational speed which shows the behavior in which a laundry falls from the height position which prevails. When the lifted laundry falls, the laundry has a beating-washing action, and by repeating this, a washing action is performed to remove dirt from the laundry that absorbs water containing detergent. When the rotation speed of the rotating drum 5 is slower than the first predetermined rotation speed, the stirring protrusion 9 cannot lift the laundry, and when the rotation speed of the rotating drum 5 is higher than the first predetermined rotation speed. Since the influence of centrifugal force increases, the lifted laundry will not fall due to its own weight. Further, by reversing the rotation direction of the rotary drum 5, the laundry is prevented from being twisted, and the position is effectively replaced.

  The action of tapping to lift and drop the laundry is affected by the amount of laundry accommodated in the rotating drum 5, so that it is more preferable that the first predetermined rotational speed is changed depending on the amount of laundry. Become a method. That is, the amount of laundry accommodated in the rotary drum 5 can be detected by the cloth amount detection unit 16 as described above, and the detected amount of laundry is stored in the storage unit 15, When the amount of the laundry thus taken is greater than a predetermined amount set in advance, the control unit 11 performs control so as to obtain a rotational speed (for example, 25 to 30 r / min) obtained by reducing the first predetermined rotational speed. On the other hand, when the stored amount of laundry is smaller than a predetermined amount set in advance, the control unit 11 performs control so that the rotation speed is increased by increasing the first predetermined rotation speed (for example, 30 to 35 r / min). To do.

  Even if the first stirring control operation is controlled to be repeated for a required washing time (for example, 15 minutes), the effect of washing while changing the position of the laundry can be obtained, but as shown in FIG. 3, the first stirring control is performed. It is possible to obtain a more preferable effect by executing the second stirring control operation after executing the operation for the required time.

  In the second agitation control operation, the rotary drum 5 is driven to rotate in the positive direction at a second predetermined rotation speed (for example, 45 to 90 r / min) for a third predetermined time (for example, 7 seconds), and then to the fourth agitation control operation. For a predetermined period of time (for example, 4 seconds), and then the rotational driving is stopped in the reverse direction at the second predetermined rotational speed for the third predetermined time, and then the rotational driving is stopped for the fourth predetermined time. The operation is defined as one cycle, and this is repeated for a second required time (for example, 1 minute).

  The second predetermined rotation speed is a rotation speed at which the laundry can be stuck to the inner peripheral surface of the rotary drum 5 by centrifugal force generated by rotating the rotary drum 5. When the laundry is stuck to the inner peripheral surface of the rotating drum 5, the lump-shaped laundry is also spread out, and the laundry that has been moved above the rotating drum 5 is driven to rotate for a fourth predetermined time. Is stopped away from the inner peripheral surface of the rotating drum 5 that rotates by inertia. By spreading and dropping due to this sticking, the position and shape of the laundry are changed, and the action of tapping is also effectively performed.

  The control operation for alternately executing the first and second stirring control operations is continued for a third required time (for example, 15 minutes), so that the position of the laundry is changed back and forth in the rotary drum 5. At the same time, the action of tapping with different behaviors can be applied, and even with the rotary drum 5 arranged at an inclination, the washing performance can be imparted to all the laundry items without degrading the washing performance.

  When the washing process is completed as described above, the control unit 11 opens the drain valve and outputs a control command for driving the drain pump 27 to the power switching unit 12, so that the dirty washing water in the water tank 3 is discharged. A drainage control operation is performed. Further, since the control unit 11 rotates the drum drive motor 4 at a high speed and outputs a control command for dehydrating the washing water contained in the laundry to the power switching unit 12, the dehydrating operation after the washing process is performed.

  After the dehydration operation for a predetermined time is performed, the control unit 11 closes the drain valve, opens the water supply valve 26, and starts a rinsing process for newly supplying tap water into the water tank 3. Even in the rinsing step, the rotating drum 5 is rotated in the forward and reverse directions and rotated, and the first stirring control operation and / or the second stirring control operation in the washing step is performed. Accordingly, since the action of tapping is uniformly applied to all the laundry by changing the position of the laundry, the rinsing with less unevenness of rinsing is performed.

  After the rinsing process for a predetermined time is performed, the dehydrating operation after the rinsing process is performed and the entire washing process is completed. Therefore, the control unit 11 notifies the completion and turns off the power switch 18 to finish the operation. . In a drum type laundry dryer having a drying function, the drying step can be continued after the dehydration step.

  In the drum-type washing machine 1 described above, the stirring protrusion 9 provided on the inner peripheral surface of the rotating drum 5 is long in a predetermined inclination angle direction from the rotating shaft direction of the rotating drum 5 as shown in FIGS. By forming the stirring protrusions 9a, 9b, and 9c having the formed top portion 22, when the rotary drum 5 rotates, the effect of moving the laundry that tends to be biased to a low position of the rotary drum 5 to a high position is effective. Can be obtained.

  FIG. 4 shows the configuration of the stirring protrusion 9a according to the first embodiment of the stirring protrusion 9, and the base portion 23 in contact with the inner peripheral surface of the rotating drum 5 is formed in a rectangular shape, and the substantially diagonal line of the base portion 23 is formed. It is formed in a mountain-shaped cross-sectional shape having a top portion 22 with a predetermined height, and a portion between the top portion 22 and the base portion 23 is formed in a substantially arc-sloped surface having a different radius depending on the cross-sectional position. When the stirring protrusion 9 a is attached to the inner peripheral surface of the rotating drum 5 such that the longitudinal direction of the base portion 23 is the rotating shaft direction of the rotating drum 5, the apex portion 22 extends in the rotating shaft direction of the rotating drum 5. It becomes the direction inclined with respect to it.

  When the rotating drum 5 having the agitation protrusions 9a configured as described above is rotated in the washing or rinsing process at a plurality of locations on the inner peripheral surface, the laundry that tends to be biased to a lower position in the inclined rotating drum 5 is Since the front side of the rotary drum 5 is lifted to the higher position side, the laundry is sufficiently stirred without being biased toward the lower side of the rotary drum 5 even if the rotary drum 5 is disposed at an inclination. It is easy to replace and mix, and does not reduce the cleaning effect. In addition, when the amount of laundry is small, the amount of washing liquid is also small, and in order to obtain a state where all the laundry is evenly immersed, it is necessary to stir so that the place of the laundry is sufficiently replaced However, since the position of the laundry is sufficiently changed, there is no unevenness in washing and the cleaning power can be improved.

  FIG. 5 shows a configuration of the stirring protrusion 9 b according to the second embodiment of the stirring protrusion 9, and the height of the top portion 22 is formed so as to increase toward the back side of the rotating drum 5. Thus, when the height dimension of the top portion 22 is increased on the back side of the rotating drum 5, that is, on the lower side of the rotating drum 5, there is an effect of lifting the laundry in a lower position to a higher position on the front side in the rotating drum 5. Since it increases, it is possible to improve the agitation action by changing the position and mixing of the laundry.

  FIG. 6 shows the configuration of the stirring protrusion 9c as a third embodiment of the stirring protrusion 9, and two stirring protrusions 9c formed on the base portion 25 at inclination angles opposite to each other from the rotation axis direction of the rotating drum 5. Is formed in a substantially triangular shape. The agitation protrusion 9c can evenly carry the laundry to a high position on the front side in the rotating drum 5 even in the forward and reverse rotation directions of the rotating drum 5. Acts effectively.

  The stirring protrusions 9a, 9b, and 9c are attached to the back side of the rotating drum 5 so that the stirring action can be further improved when the rotating drum 5 is inclined. Moreover, it is preferable to form the dimension of a longitudinal direction in about 1/2 of the dimension of the rotating drum 5 in the rotation axis direction, and it is possible to obtain the effect of lifting the laundry at a low position to a high position.

  Drum-type washing machines have the advantage that they do not damage the laundry and use less water, but they are not easy to use because the laundry can be taken in and out from the front, making it unsuitable for the narrow residential environment in Japan. By placing the rotating drum in an inclined position, it becomes easy to put in and out the laundry. This makes it possible to use the laundry machine that is comparable to the conventional automatic washing machine that puts in and out the laundry. The difficulty of biasing to the side is also improved by the stirring control operation, and the usability of the drum-type washing machine having excellent cleaning properties can be improved and can be spread.

Sectional drawing which shows the principal part structure of the drum type washing machine which concerns on embodiment. The block diagram which shows the structure of the control apparatus in a drum type washing machine same as the above. The timing chart which shows the control sequence of the rotating drum by a control apparatus same as the above. (A) which shows the 1st embodiment of a stirring protrusion is a top view, (b) is a front view, (c) is a side view. (A) which shows the 2nd embodiment of a stirring protrusion is a top view, (b) is a front view, (c) is a side view. (A) which shows the 3rd embodiment of a stirring protrusion is a top view, (b) is a front view, (c) is a side view. Sectional drawing which shows the structure of the drum type washing machine which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum-type washing machine 2 Washing machine housing | casing 3 Water tank 4 Drum drive motor 5 Rotating drum 8 Door body 9, 9a, 9b, 9c Stirring protrusion 10 Control apparatus 16 Cloth amount detection part 22, 24 Top part

Claims (8)

A rotating drum formed in a bottomed cylindrical shape is placed in the aquarium so that the axis of rotation is inclined downwards by approximately 30 ± 5 degrees from the horizontal direction from the opening front side to the back side as the bottom. And
In at least one of the washing step and the rinsing step, the rotating drum is moved at a first predetermined rotational speed that exhibits a behavior in which the laundry lifted upward by the rotation of the rotating drum falls from a height position where its own weight is prevailing. A drum-type washing machine that performs a first agitation control that repeats a control operation for stopping a rotation of the rotating drum for a second predetermined time after the first predetermined time of rotation driving, for a first required time. The drum type washing machine according to claim 1, wherein the rotational drive is alternately executed in forward and reverse directions. 3. The drum type washing machine according to claim 1, wherein the first predetermined rotation speed is 30 ± 5 r / min when the diameter of the rotating drum is 500 ± 50 mm. 4. The amount of laundry accommodated in the rotating drum is detected by the laundry amount detecting means, and when the amount of laundry larger than a predetermined amount set in advance is detected, the first predetermined rotational speed of the rotating drum is set to 25 to 30 r / min. The drum type washing machine according to claim 3, wherein the drum type washing machine is controlled so as to become. The amount of laundry stored in the rotating drum is detected by the laundry amount detecting means, and when the amount of laundry less than a predetermined amount set in advance is detected, the first predetermined rotation speed of the rotating drum is set to 30 to 35 r / min. The drum type washing machine according to claim 3, wherein the drum type washing machine is controlled so as to become. In at least one of the washing step and the rinsing step, the rotating drum is rotated for a third predetermined time at a second predetermined rotation speed indicating the behavior of the laundry sticking to the inner peripheral surface of the rotating drum by the rotation of the rotating drum. 3. The drum type washing machine according to claim 1, wherein after the driving, the second agitation control is executed to repeat the control operation for stopping the rotation driving of the rotating drum for a fourth predetermined time for a second required time. The drum type washing machine according to any one of claims 1 to 6, wherein the first stirring control and the second stirring control are alternately repeated for a third required time. The stirring protrusion which has the top part formed in the inner peripheral surface of a rotating drum long in the predetermined | prescribed inclination angle direction from the rotating shaft direction of the rotating drum is provided in multiple positions. Drum-type washing machine.

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