JP2005169002A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly determine a cause, when the rotation of a motor stops during an operation, whether an opened drum lid is caught by an inner surface of an outer tub to stop a drum or a trouble related to the motor occurs. <P>SOLUTION: When the motor is detected to be in the stop state during the washing, the motor is rotated in the normal rotating direction and a reverse rotating direction on trial to rotate the drum to its lock position (Steps S4 and S7). When the drum rotates till the lock position, this washing machine determines that the opened drum lid is caught by the inner surface of the outer tub to stop the drum and stop the rotation of the motor and notifies the cause to a user (Step S11). When the motor does not rotate even if being rotated in the normal rotating direction and the reverse rotating direction on trial, this washing machine determines that the trouble related to the motor occurs and notifies it to the user (Step S10). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drum type washing machine that accommodates laundry in a drum and performs washing.

  2. Description of the Related Art Conventionally, there is known a drum type washing machine that accommodates laundry in a substantially cylindrical drum that can rotate around a rotation axis extending in a substantially horizontal direction and performs washing. For example, the drum is arranged in an outer tub that can store water during washing, and the drum is rotated by rotating the drum in a state where a certain amount of water is stored in the outer tub. Washing (tapping) can be performed by repeating the operation (tumbling) of lifting up by a baffle provided on the inner surface and allowing it to fall naturally from a certain height toward the water surface.

Among drum-type washing machines, there is a so-called top open type in which laundry can be taken in and out through an opening that can be opened and closed by a drum lid formed on the peripheral surface of the drum (for example, Patent Documents). 1). In the drum-type washing machine disclosed in Patent Document 1, the drum is slowly rotated in a certain direction immediately after the operation is started, the drum lid is caught on the inner surface (contact portion) of the outer tub, and the drum is stopped. By detecting that the motor for rotationally driving the motor has stopped, it is possible to detect that the user has started the operation of the drum type washing machine without closing the drum lid.
Japanese Patent Laid-Open No. 2003-265884

  Even when the user starts the operation of the drum type washing machine with the drum cover closed, the drum cover may open during the operation. In this case, as in the case where the operation is started without closing the drum lid, the drum lid is caught by the inner surface of the outer tub, the drum is stopped, and the rotation of the motor is stopped. However, in this case, the drum lid is caught by the inner surface of the outer tub and the drum is stopped, so that the rotation of the motor is stopped, or an abnormal state related to the motor (motor failure, etc.) has occurred. There is a problem that it cannot be determined whether the rotation of the motor is stopped.

  This invention was made under such a background, and when the rotation of the motor stops during operation, the drum cover that is opened is caught by the inner surface of the outer tub, or the drum is stopped, Alternatively, an object of the present invention is to provide a drum type washing machine that can satisfactorily determine whether an abnormal state related to a motor has occurred.

  In order to achieve the above object, an invention according to claim 1 is provided with an outer tub (7) capable of storing water at the time of washing, and is arranged in the outer tub, and a drum lid (25) is provided on the peripheral surface (10C). The drum (10) in which the drum opening (22) for taking in and out the laundry that can be opened and closed is formed around the rotation shaft (11L, 11R) set within a predetermined angle range with respect to the horizontal direction. A drum-type washing machine (1) that performs washing by rotating to a motor (12), and a motor (12) for rotationally driving the drum, and the rotation of the motor stops despite the motor being driven. When the motor stop detecting means (40, 51) for detecting that the motor is stopped and the motor stop detecting means detect that the rotation of the motor is stopped, the motor is driven to rotate in a certain direction. The above drum Motor drive trial means (40, 46, S4, S7) for trying to rotate to a predetermined rotational position, and detecting whether or not the drum has been rotated to the predetermined rotational position by the motor drive trial means. A drum type washing machine including drum rotation detecting means (40, S5, S8).

The alphanumeric characters in parentheses indicate corresponding components in the embodiments described later. The same applies hereinafter.
According to this configuration, when it is detected that the rotation of the motor has stopped, the motor is driven to rotate in a certain direction, and when the motor rotates and the drum rotates to the predetermined rotation position, the motor is opened. It can be determined that the rotation of the motor has stopped because the drum lid has been caught by the inner surface of the outer tub and the drum has stopped. On the other hand, if the drum has not rotated to the predetermined rotation position, an abnormal condition related to the motor has occurred. It can be determined that it has occurred.

The certain direction is opposite to the direction in which the drum lid is easily caught on the inner surface of the outer tub (7) when the motor (12) is rotated with the drum lid (25) opened. Is preferred.
According to a second aspect of the present invention, when the drum rotation detecting means (40, S5, S8) detects that the drum (10) has been rotated to the predetermined rotation position, the drum lid (25) is opened. The drum-type washing machine (1) according to claim 1, further comprising drum lid open state notifying means (6, 40, S11) for notifying that the operation is in progress.

According to this configuration, when it is determined that the rotation of the motor has stopped because the opened drum lid is caught by the inner surface of the outer tub and the drum has stopped, the fact is notified and the user is prompted to close the drum lid. be able to.
According to a third aspect of the present invention, when the drum rotation detecting means (40, S5, S8) detects that the drum (10) is not rotated to the predetermined rotation position, the motor (12) is provided. The drum type washing machine (1) according to claim 1 or 2, further comprising motor abnormality notification means (6, 40, S10) for notifying that a related abnormal state has occurred.

According to this configuration, when it is determined that an abnormal state related to the motor has occurred, it is possible to notify the user to that effect.
According to a fourth aspect of the present invention, the outer tub (7) has an outer tub opening (23) for taking in and out of the laundry, and the motor drive trial means (40, 46, S4, S7). When the motor stop detecting means (40, 51) detects that the rotation of the motor (12) is stopped, the motor is rotated in the predetermined direction to open the drum opening (22). The drum type washing machine (1) according to any one of claims 1 to 3, wherein the drum (10) is tried to rotate to a rotation position (lock position) opposite to the outer tub opening. ).

  According to this configuration, when it is determined that the rotation of the motor has stopped because the opened drum lid has been caught by the inner surface of the outer tub and the drum has stopped, the drum opens to the rotational position where the drum opening faces the outer tub opening. It will rotate. In this state, since the drum lid faces the outer tank opening, the user can easily close the drum lid through the outer tank opening, which is convenient.

  According to a fifth aspect of the present invention, the motor drive trial means (40, 46, S4, S7) rotates the motor (12) in the fixed direction to move the drum (10) to the predetermined rotational position. If the drum rotation detecting means (40, S5) detects that the drum has not been rotated to the predetermined rotation position even if the rotation is attempted (S4), the motor is opposed to the fixed direction. The drum type washing machine (1) according to any one of claims 1 to 4, wherein the drum type washing machine (1) is driven to rotate in a direction to rotate the drum to the predetermined rotational position (S7). is there.

  According to this configuration, when it is detected that the rotation of the motor has stopped, the motor is tried to rotate in a certain direction, and when the drum does not rotate to the predetermined rotation position, the certain direction of the motor If the drum rotates to the predetermined rotation position at this time, the opened drum lid is caught by the inner surface of the outer tub and the drum stops, so the motor stops rotating. Can be determined.

This allows the motor to rotate only in the opposite direction to the fixed direction and not to rotate in the fixed direction, even though the opened drum lid is caught on the inner surface of the outer tub and the drum is stopped. It can be prevented that a related abnormal state is detected.
Therefore, when the rotation of the motor stops during operation, the drum cover that has been opened is caught by the inner surface of the outer tub, or the drum has stopped, or an abnormal condition related to the motor has occurred. It is possible to better determine whether it is a thing.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a drum-type washing machine 1 according to an embodiment of the present invention, and shows a cross-section viewed from the front when cut along a vertical plane along the left-right direction. FIG. 2 is a longitudinal cross-sectional view of the drum type washing machine 1 and shows a cross-section viewed from the right side when cut along a vertical plane along the front-rear direction.

  Referring to FIGS. 1 and 2, the drum type washing machine 1 is partitioned by a casing 2 having an approximately rectangular parallelepiped shape. An opening 4 for taking in and out the laundry that can be opened and closed by the outer lid 2A is formed on the upper surface of the housing 2. Inside the housing 2, an outer tub 7 formed by closing both end faces of a substantially cylindrical peripheral wall 7C with end face walls (the left end face wall 7L and the right end face wall 7R) has its axis line left and right (substantially) (Horizontal). The outer tub 7 is supported by a plurality of dampers 5 at the lower part of the peripheral wall 7C (see FIG. 2).

Inside the outer tub 7, a drum 10 for storing laundry therein is arranged. The drum 10 is formed by closing both end faces of a substantially cylindrical peripheral wall 10C with end face walls (left end face wall 10L and right end face wall 10R), and is arranged so that its axis extends to the left and right (substantially horizontal). Has been.
Rotating shafts 11L and 11R extending along the axis of the drum 10 are attached to the left and right end face walls 10L and 10R of the drum 10, respectively. The rotary shafts 11L and 11R are rotatably attached to the left and right end face walls 7L and 7R of the outer tub 7. A drum driving motor 12 is connected to the left rotating shaft 11L by, for example, a DD (direct drive) system, and the drum 10 connected to the rotating shaft 11L is axially driven by rotating the motor 12. It is designed to rotate around at the same rotational speed. On the inner surface of the peripheral wall 10C of the drum 10, three baffles 10B for lifting the laundry in the drum 10 when the drum 10 rotates are spaced apart from each other at equal intervals in the circumferential direction (every 120 °). It protrudes so as to extend in the left-right direction.

  An opening 22 for taking in and out the laundry is formed in a part of the peripheral wall 10C of the drum 10. An opening 23 is formed in the peripheral wall 7 </ b> C of the outer tub 7 at a position facing the opening 4 of the housing 2. The opening 22 of the drum 10 can be opened and closed by a drum lid 25 that can rotate outward, and the opening 23 of the outer tub 7 can be opened and closed by an inner lid 26 that can rotate outward. It has become. By opening all of the outer lid 2A, the inner lid 26, and the drum lid 25, the laundry can be taken in and out of the drum 10 through the openings 4, 22, and 23.

  A water supply port 2B is formed at the rear of the upper surface of the housing 2 (see FIG. 2), and tap water (hereinafter simply referred to as “water”) from the outside water supply facility (such as a water tap) through the water supply port 2B. ")") Can be introduced. A water supply valve (not shown) is connected to the water supply port 2B, and water is introduced into the machine through the water supply port 2B by opening the water supply valve. The water introduced into the machine from the water supply port 2 </ b> B is supplied into the outer tub 7 from the rear end portion of the peripheral wall 7 </ b> C of the outer tub 7 through the water supply pipe 17.

  A drain port 19 is formed at the lower right side of the peripheral wall 7 </ b> C of the outer tub 7. By supplying water with the drain valve 18 connected to the drain port 19 closed, water can be stored in the outer tub 7. A large number of water passage holes (not shown) are formed in the peripheral wall 10C of the drum 10, and the water supplied into the outer tub 7 flows into the drum 10 through the water passage holes. It has become. The water stored in the outer tub 7 is discharged out of the machine through the drain port 19 and the drain hose 20 by opening the drain valve 18.

  When washing is performed in a normal operation course in the drum type washing machine 1, the washing process, the rinsing process, and the dehydrating process are executed in this order. In the washing process and the rinsing process, the drum 10 is rotated while water is stored in the outer tub 7 up to a certain water level, and the laundry in the drum 10 is lifted by the baffle 10B along with the rotation. The action (tumbling) of falling naturally from the top is repeated. By repeating the tumbling, the laundry is struck against the water surface of the water stored in the outer tub 7, and so-called tapping is achieved. In this embodiment, the motor 12 rotates forward (clockwise in FIG. 2) and reverses (counterclockwise in FIG. 2) in a state where water is stored in the outer tub 7 to a certain water level in the washing process and the rinsing process. However, it is repeated alternately with a predetermined motor stop time (intermittent operation).

At the time of dehydration, the drum 10 is rotated at a high speed (for example, 300 to 1000 rpm), so that water contained in the laundry in the drum 10 is squeezed out by centrifugal force. Then, the water squeezed out from the laundry is scattered to the outer tub 7 side through the water passage hole of the drum 10 and is discharged from the drain port 19.
The drum type washing machine 1 also has a function of drying the dehydrated laundry, and a drying unit 3 for the drying function is attached to the right end surface wall 7R of the outer tub 7 from the outside (see FIG. 1). The drying unit 3 warms the air in the outer tub 7 sucked through an air passage member (not shown) communicating with the inside of the outer tub 7 by the two drying heaters 34, and then the right end wall of the outer tub 7. It is led into the outer tub 7 from the blower port 31 formed at the center of 7R toward the left.

At the time of drying, by rotating the drum 10 while sending warm air from the drying unit 3 into the outer tub 7, the operation of lifting the laundry in the drum 10 by the baffle 10B and dropping it naturally from a certain height is repeated. It is. Thereby, the laundry in the drum 10 can be uniformly exposed to warm air, and the laundry can be dried well.
FIG. 3 is a vertical cross-sectional view of the drum 10, and shows a cross-section viewed from the right side when cut along a vertical plane along the front-rear direction. 3A shows a state where the drum lid 25 is closed, and FIG. 3B shows a state where the drum lid 25 is opened.

  Referring to FIG. 3, drum lid 25 includes two lids (rear lid 251 and front lid 252) arranged in the front-rear direction. A rear end of the rear lid 251 is rotatably held by a rotation shaft 251 </ b> A attached to the peripheral wall 10 </ b> C of the drum 10. On the other hand, the front end of the front lid 252 is rotatably held by a rotation shaft 252A attached to the peripheral surface wall 10C of the drum 10. The rear end portion of the rear lid 251 and the front end portion of the front lid 252 are connected by a rod-like connecting member 253. When one of the rear lid 251 and the front lid 252 is rotated, the other is also rotated in conjunction with the rotation. It is supposed to be. Further, the rear lid 251 and the front lid 252 are urged toward the opening direction (upward) by an urging member (not shown) such as a spring, for example.

  A claw portion 252B protruding upward is formed at the rear end portion of the front lid 252. An engagement hole 251B corresponding to the claw portion 252B of the front lid 252 is formed at the front end portion of the rear lid 251. (See FIG. 3B). When the rear lid 251 and the front lid 252 are closed, as shown in FIG. 3A, the claw portion 252B is caught in the engagement hole 251B, and the drum lid 25 is maintained in the closed state. Yes.

  When the operation of the drum type washing machine 1 is stopped, the drum 10 has the opening 22 of the outer tub 7 as shown in FIG. 2 by the action of the lock mechanism 14 (see FIG. 1). It is locked at the opposite position (lock position). More specifically, the lock mechanism 14 attached to the lower portion of the left end wall 7L of the outer tub 7 is provided with a plunger 141 that can slide in the vertical direction, and the plunger 141 is in a state where the drum 10 is in the lock position. Is slid upward, the front end of the plunger 141 engages with an engagement recess 121 formed in the motor 12, and the rotation of the motor 12 (drum 10) is locked. In this state, the drum lid 25 faces (opposes) the opening 23 of the outer tub 7.

  In order to open the drum lid 25, the outer lid 2A and the inner lid 26 must be opened, and a space for opening the drum lid 25 must be secured above the drum lid 25. With the outer lid 2A and the inner lid 26 opened, the front lid 252 is pushed downward through the openings 4 and 23, whereby the claw portion 252B and the engagement hole 251B can be disengaged. The rear lid 251 and the front lid 252 that have been disengaged from each other are rotated upward from the state shown in FIG. 3B by the urging force of the urging member applied to the rear lid 251 and the front lid 252, respectively. Is greatly opened.

However, the configuration is not limited to the configuration in which the drum lid 25 can be opened by performing an operation such as pushing the front lid 252 downward with respect to the drum lid 25. For example, the drum lid 25 is linked with the opening of the inner lid 26. A configuration in which the engagement between the claw portion 252B and the engaging portion 251B of the lid 25 is released and the drum lid 25 is opened may be employed.
When closing the drum lid 25, only one of the rear lid 251 and the front lid 252 is pivoted downward, and the other coupled via the coupling member 253 is pivoted downward together. As shown to (a), the nail | claw part 252B and the engagement hole 251B can be engaged.

  In this embodiment, when the drum 10 is rotating with the drum lid 25 closed, the drum lid 25 and the outer tub 7 are not in contact with each other, but the claw portion 252B and the engagement hole 251B are engaged during operation. Is removed and the drum lid 25 is opened, the drum lid 25 is caught on the inner surface of the outer tub 7, and the drum 10 does not rotate any more. In this case, the motor 12 for rotationally driving the drum 10 is stopped.

FIG. 4 is a partial cross-sectional view of the outer tub 7 and the drum 10 in a state where the opened drum lid 25 is caught on the inner surface of the outer tub 7.
When the engagement between the claw portion 252B and the engagement hole 251B is disengaged during operation and the drum lid 25 is opened, as shown in FIG. 4, when the drum 10 is reversed, the rear lid 251 The front end may be caught on the front edge (contact portion 71) of the opening 23 of the outer tub 7. Even if energization of the motor 12 is continued in this state, the drum 10 does not rotate and the motor 12 is stopped.

In this embodiment, when the engagement between the claw portion 252B and the engagement hole 251A is released, as shown in FIG. 4, the front end portion of the rear lid 251 opens to a higher position than the rear end portion of the front lid 252. It is like that. Therefore, when the drum lid 25 is opened during operation, the front end portion of the rear lid 251 is easily caught on the inner surface of the outer tub 7 when the drum 10 is reversed.
However, as shown in FIG. 4, when the drum 10 is inverted, the front end portion of the rear lid 251 may be caught on the inner surface of the outer tub 7, and the rear lid when the drum 10 is rotating forward. The outer surface of the rear cover 251 (for example, a cover member attached to the front end of the outer surface of the rear cover 251 and operated by the user to push down the rear cover 251 when the drum cover 25 is closed) A protruding portion or the like) may be caught on the inner surface of the outer tub 7. Further, the drum lid 25 may be caught not only on the contact portion 71 of the outer tub 7 as shown in FIG. 4 but also on other portions of the inner surface of the outer tub 7.

FIG. 5 is a block diagram showing an electrical configuration of the drum type washing machine 1.
The operation of the drum type washing machine 1 is controlled by a control unit 40 including a microcomputer. The control unit 40 includes a CPU 41, a RAM 42, a ROM 43, an A / D converter 44, and the like. In addition, the control unit 40 functionally includes a rotation speed control unit 46, a motor stop detection unit 51, and the like when the microcomputer executes program processing.

  For example, an operation display panel 6 provided on the upper surface of the housing 2 is attached to the control unit 40 so that input / output is possible. The user can perform various settings (such as setting the water level stored in the outer tub 7 during washing) by operating the operation display panel 6, and a signal based on the operation of the operation display panel 6 is input to the control unit 40. It has come to be. Further, the control unit 40 can display the operation status and setting contents of the drum type washing machine 1 on the operation display panel 6 by outputting a signal to the operation display panel 6.

  Further, the controller 40 receives signals from the outer lid opening / closing detection sensor S2 for detecting the opening / closing of the outer lid 2A and from the inner lid opening / closing detection sensor S2 for detecting the opening / closing of the inner lid 26. It has become. These sensors S1 and S2 are microswitches that detect opening and closing using actuators that are displaced in accordance with opening and closing of the outer lid 2A and the inner lid 26, and reflected light of light emitted toward the outer lid 2A and the inner lid 26. It is preferable to include a photo sensor that detects opening and closing depending on whether or not light is received.

  Furthermore, the motor 12 described above is connected to the control unit 40 via an inverter control unit 49. The rotation speed control unit 46 of the control unit 40 can inverter-control the rotation speed of the motor 12 via the inverter control unit 49. That is, the rotation speed control unit 46 of the control unit 40 transmits a rotation speed instruction signal to the inverter control unit 49, and the inverter control unit 49 converts the instruction signal into a PWM signal and drives according to the PWM signal. Current is applied to the motor 12.

  An output signal from the motor 12 is input to the motor stop detection unit 51. When the drum lid 25 is opened during operation, the motor 12 is stopped as described above, and the rotation pulse (output signal) of the motor 12 is not output. The motor stop detection unit 51 of the control unit 40 can detect the stop state of the motor 12 by detecting that the rotation pulse of the motor 12 is not output.

  However, the configuration is not limited to detecting the stop state of the motor 12 by detecting that the rotation pulse of the motor 12 is not output. For example, the load acting on the motor 12 when the motor 12 is stopped is detected. The stop state of the motor 12 may be detected by detecting that the driving current applied to the motor 12 increases and exceeds a specified value.

FIG. 6 is a flowchart showing a flow of control by the control unit 40 during the washing process.
Referring to FIG. 6, during the washing process, the control unit 40 causes the motor stop detection unit 51 to operate the motor until a certain time elapses and the washing process is finished (until YES in step S1). Whether or not the motor 12 is stopped despite the drive of the motor 12 is monitored (step S2). When it is time to finish the washing process without the motor stop detection unit 51 detecting that the motor 12 has been stopped (YES in step S1), the control unit 40 performs the washing at that time. End the process.

  When the motor stop detection unit 51 detects that the motor 12 is stopped during the washing process (YES in Step S2), the control unit 40 temporarily stops the operation of the drum type washing machine 1 (Step S2). S3) An attempt is made to rotate the drum 10 to the lock position by rotating the motor 12 in the direction in which the drum 10 is normally rotated (forward direction) (step S4). At this time, the drum 10 is rotated in a direction opposite to the direction in which the opened drum lid 25 is easily caught on the inner surface of the outer tub 7.

  In this case, an abnormal state related to the motor 12 (failure of the motor 12 or the like) has not occurred. For example, in the state shown in FIG. 4, the drum cover 25 (rear cover 251) 71), the drum 10 rotates in the forward direction (clockwise in FIG. 4), and the drum 10 rotates to the locked position as shown in FIG. Whether or not the drum 10 has rotated to the locked position can be detected by detecting the position of a position detection magnet (not shown) attached to the motor 12, for example. When it is detected that the drum 10 has been rotated to the lock position, the plunger 141 of the lock mechanism 14 is slid and engaged with the engagement recess 121 of the motor 12, whereby the drum 10 is locked at the lock position.

  Thus, when the drum 10 has been rotated to the locked position before the predetermined time has elapsed (YES in step S5), the control unit 40 indicates that the opened drum lid 25 (the front end portion of the rear lid 251) is the outer tank. 7, it can be determined that the rotation of the motor 12 is stopped because the drum 10 is stopped by being caught on the inner surface of the motor 7. In this case, the control unit 40 displays on the operation display panel 6 for notifying that the drum lid 25 is open (notifying the drum lid open state) (step S11), and prompting the user to close the drum lid 25. . After that, when the drum lid 25 is closed by the user and an operation for resuming the operation is performed, the control unit 40 performs the control after Step S1 again.

  On the other hand, when the predetermined time has passed without the drum 10 rotating to the lock position (NO in step S5, YES in step S6), the control unit 40 causes the motor 12 to reverse the drum 10 (reverse direction). To rotate the drum 10 to the locked position (step S7). At this time, when an abnormal state related to the motor 12 (failure of the motor 12 or the like) has not occurred, for example, when the rear end of the front lid 252 is caught on the inner surface of the outer tub 7, the drum 10 Rotating in the reverse direction, the drum 10 is rotated to the locked position as shown in FIG.

  As described above, when the drum 10 rotates to the lock position before the predetermined time elapses (YES in step S8), the control unit 40 indicates that the opened drum lid 25 (for example, the outer surface of the rear lid 251) is outside. It can be determined that the rotation of the motor 12 is stopped because the drum 10 is stopped by being caught on the inner surface of the tank 7. In this case, the control unit 40 displays on the operation display panel 6 for notifying that the drum lid 25 is open (notifying the drum lid open state) (step S11), and prompting the user to close the drum lid 25. . After that, when the drum lid 25 is closed by the user and an operation for resuming the operation is performed, the control unit 40 performs the control after Step S1 again.

  On the other hand, if the predetermined time has passed without the drum 10 rotating to the lock position (NO in step S8, YES in step S9), that is, an attempt is made to rotate the motor 12 in either the forward direction or the reverse direction. However, if the motor 12 does not rotate, the control unit 40 can determine that an abnormal state related to the motor 12 has occurred. In this case, the control unit 40 performs a display for notifying that the abnormal state related to the motor 12 has occurred on the operation display panel 6 (motor abnormality notification) (step S10).

  In this embodiment, the rotation of the motor 12 is tried when it is detected that the rotation of the motor 12 has stopped, and the drum cover 25 is opened when the motor 12 rotates and the drum 10 rotates to the lock position. It can be determined that the rotation of the motor 12 has stopped because the drum 10 has stopped due to being caught on the inner surface of the outer tub 7, but if the drum 10 does not rotate to the locked position, an abnormal state related to the motor 12 occurs. Can be determined.

  Further, in this embodiment, when it is determined that the rotation of the motor 12 has stopped because the opened drum lid 25 has been caught on the inner surface of the outer tub 7 and the drum 10 has stopped, the opening 22 of the drum 10 has the opening 22 of the outer tub 7. Thus, the drum 10 is rotated to the lock position facing the opening 23. In this state, since the drum lid 25 faces the opening 23 of the outer tub 7, the user can easily close the drum lid 25 through the opening 23 of the outer tub 7, which is convenient.

  Furthermore, in this embodiment, when it is detected that the rotation of the motor 12 is stopped, the motor 12 is tried to rotate in the forward direction, and when the drum 10 does not rotate to the lock position, the motor 12 When rotation in the reverse direction is tried and the drum 10 is rotated to the lock position at this time, the opened drum lid 25 (for example, the outer surface of the rear lid 251) is caught on the inner surface of the outer tub 7, and the drum 10 is rotated. Therefore, it can be determined that the rotation of the motor 12 has stopped.

As a result, the motor 12 can only rotate in the reverse direction and cannot rotate in the normal rotation direction even though the opened drum lid 25 is caught on the inner surface of the outer tub 7 and the drum 10 is stopped. It can be prevented that an abnormal state related to the occurrence of an abnormal state is detected.
Therefore, when the rotation of the motor 12 is stopped during operation, the drum cover 25 that is opened is caught by the inner surface of the outer tub 7 and the drum 10 is stopped, or an abnormal state related to the motor 12. It is possible to better discriminate whether or not this is due to the occurrence of

The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.
For example, when it is detected that the rotation of the motor 12 has stopped, the motor 12 is tried to rotate in the forward direction, and when the drum 10 does not rotate to the lock position, the motor 12 rotates in the reverse direction. It is not limited to the configuration in which driving is attempted, but the forward direction of the motor 12 (the direction opposite to the direction in which the drum lid 25 is easily caught on the inner surface of the outer tub 7 when the motor 12 is rotated with the drum lid 25 opened) The configuration may be such that only rotational driving in the direction) is attempted.

In addition, the control for detecting whether the drum lid 25 is open or whether an abnormal state related to the motor 12 has occurred is not limited to the configuration that is performed during the washing process, but the drum type washing machine. The configuration may be such that it is performed during another stroke (for example, during a rinsing stroke or a dehydrating stroke) during the operation of one.
The motor abnormality notification and the drum lid open state notification are not limited to being configured by displaying on the operation display panel 6, but may be configured by, for example, sound (error sound or sound).

  The drum 10 is not limited to a configuration in which the axis extends in the left-right direction, and may be configured to extend in the front-rear direction, for example. In this case, the axis of the drum is not limited to a configuration extending substantially in the horizontal direction, and may be inclined within a predetermined angle range (for example, up to about 30 °) with respect to the horizontal direction.

It is the longitudinal cross-sectional view of the drum type washing machine which concerns on one Embodiment of this invention, Comprising: The figure which looked at the cross section when cut | disconnected by the vertical surface along the left-right direction is shown from the front. It is the longitudinal cross-sectional view of a drum-type washing machine, Comprising: The figure which looked at the cross section when cut | disconnected by the vertical surface along the front-back direction is shown from the right side. It is the longitudinal cross-sectional view of a drum, Comprising: The figure which looked at the cross section when cut | disconnected by the vertical surface along the front-back direction is shown from the right side. It is a partial sectional view of an outer tub and a drum in the state where an opened drum lid was caught in the inner surface of an outer tub. It is a block diagram which shows the electric constitution of this drum type washing machine. It is a flowchart which shows the flow of control by the control part in the washing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing machine 6 Operation display panel 7 Outer tub 10 Drum 10C Peripheral wall 11L, 11R Rotating shaft 12 Motor 22 Opening 23 Opening 25 Drum lid 40 Control part 46 Rotational speed control part 51 Motor stop detection part

Claims (5)

A drum having an outer tub that can store water during washing and having a drum opening arranged in the outer tub and openable and closable by a drum lid is formed in the outer surface of the drum. A drum-type washing machine that performs washing by rotating around a rotation axis set within a predetermined angle range,
A motor for rotationally driving the drum;
Motor stop detection means for detecting that the rotation of the motor is stopped despite driving the motor;
Motor drive trial means that, when the motor stop detection means detects that the rotation of the motor is stopped, attempts to rotate the motor in a certain direction to rotate the drum to a predetermined rotational position; ,
A drum type washing machine comprising: drum rotation detecting means for detecting whether or not the drum has been rotated to the predetermined rotation position by the motor drive trial means.   A drum lid open state notifying means for notifying that the drum lid is open when the drum rotation detecting means detects that the drum has been rotated to the predetermined rotation position. The drum-type washing machine according to 1.   Motor abnormality notifying means for notifying that an abnormal state related to the motor has occurred when the drum rotation detecting means detects that the drum has not been rotated to the predetermined rotation position. The drum type washing machine according to claim 1 or 2. The outer tub is formed with an outer tub opening for taking in and out of the laundry,
When the motor stop detection means detects that the rotation of the motor is stopped, the motor drive trial means drives the motor to rotate in the predetermined direction so that the drum opening faces the outer tank opening. The drum type washing machine according to any one of claims 1 to 3, wherein an attempt is made to rotate the drum to a rotating position. Even if the motor drive trial means tries to rotate the drum in the predetermined direction to rotate the drum to the predetermined rotation position, the drum rotation detection means causes the drum to reach the predetermined rotation position. 2. When it is detected that the motor is not rotated, the motor is rotated in a direction opposite to the predetermined direction to try to rotate the drum to the predetermined rotational position. The drum type washing machine in any one of -4.

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