JP6209743B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine having a brake mechanism that applies a braking force to the rotation of a washing and dewatering tub.

  In a conventional washing machine, when the power is not turned on or just turned on, the braking mechanism always applies a braking force to the rotation of the washing and dewatering tub by the brake mechanism to ensure safety, and washing by human power It is difficult to rotate the cum dewatering tank. Therefore, it is disclosed that the brake release device is operated after a predetermined time has elapsed since the power is turned on, and the brake release step in which the washing and dewatering tub is manually rotated is performed (for example, Patent Document 1).

  FIG. 6 is a side sectional view of a conventional washing machine. As shown in FIG. 6, the outer frame 1 of the washing machine has a water receiving tub 3 suspended by a suspension rod 2, and a washing / dehydrating tub 4 serving as both a washing tub and a dewatering tub inside the water receiving tub 3. (Hereinafter referred to as a washing tub 4) is rotatably provided. In the washing tub 4, a pulsator 5 is rotatably disposed at the bottom, and a lower blade 6 is provided integrally with the pulsator 5. The motor 7 drives the pulsator 5 or the washing tub 4 via the V belt 8 and the speed reduction mechanism 9.

  The lint circulation water channel 10 and the water spray nozzle circulation water channel 11 are provided so as to extend from the pump chamber 12 on the outer periphery of the lower blade 6 of the pulsator 5 to the upper part of the washing tub 4. 14 are provided. The drain valve 15 drains the washing water in the water receiving tank 3. The water supply valve 16 supplies water into the water receiving tank 3. A lid 18 is provided on the upper frame 17 constituting the upper part of the outer frame 1 so as to be freely opened and closed. Moreover, the control apparatus 19 is provided in the front. In the upper part of the washing tub 4, a fluid balancer 20 for reducing vibration during dehydration is provided, and the fluid balancer 20 is provided with a soft finishing agent automatic outflow device 21.

  FIG. 7 is a side sectional view of a speed reduction mechanism of a conventional washing machine. As shown in FIG. 7, the speed reduction mechanism 9 is configured such that a washing shaft 22 that rotates the pulsator 5 and a dewatering shaft 23 that rotates the washing tub 4 rotate at the same time during dehydration. Only the washing shaft 22 rotates via the gear 25. A brake wheel 26 provided on the dewatering shaft 23 encloses the reduction gear 25, and a brake band 27 to which a brake shoe 27a is bonded is disposed around the brake wheel 26. As a brake mechanism, the brake shoe 27a is closely attached to the periphery of the brake wheel 26, thereby preventing the washing tub 4 from rotating together during washing, stopping the rotation of the washing tub 4 at the end of the dehydration operation, When the power is not turned on, the brake is always applied to prevent the washing tub 4 from idling. Further, the brake mechanism is configured to brake the rotation of the washing tub 4 and activate the brake when the power is not turned on.

When the power is turned on, the control device 19 releases the brake after a predetermined time of, for example, 15 seconds has elapsed. Thus, even when the lint filter and the soft finish automatic spill device are hidden behind the opening of the upper frame at the start of the washing operation, etc., the user can easily perform the washing tub without requiring force. It becomes possible to turn. And since a lint filter and a soft finish automatic outflow device can be moved to an easy-to-operate place, usability such as operability and workability can be improved. Furthermore, when starting the washing operation, it is possible to complete the switching of the clutch while the brake is operating reliably, and then the motor can be driven, and the motor rotates during the switching of the brake and the clutch. Therefore, it is possible to prevent the occurrence of an abnormal noise of clutch switching, the failure of the speed reduction mechanism, and the like.

JP 2007-143910 A

  However, in such a conventional washing machine, even if the washing tub is not rotating, when the power is turned on, the brake is not released until a predetermined time of, for example, 15 seconds elapses. This is a configuration in which the brake is released immediately upon turning on the power, and when the washing tub is rotating at a high speed during the dehydration process, if the user turns off the power and immediately turns it on again, the power is turned off. The brake is immediately actuated by the above, but when the power is turned on again, there is a possibility that the brake is released before the rotation of the washing tub stops and the rotation does not stop completely. In this way, even if the operation is not normally performed, in order to prevent the situation where the rotation of the washing tub does not stop, the washing tub does not rotate when the power is turned on. There is a problem that the brake needs to be operated for a predetermined time, and the user cannot easily turn the washing tub until the predetermined time elapses.

  The present invention solves the above-described conventional problems. When the washing tub is not rotating when the power is turned on, the brake is released from the beginning, and the lint filter is cleaned or the softener is charged. An object of the present invention is to provide a washing machine with improved usability such as operability and workability.

  In order to achieve the above-mentioned object, the washing machine of the present invention includes a water tub provided in an outer frame of the washing machine and having a washing tub that can be dewatered and rotated inside, and is rotatable at the inner bottom of the washing tub. A series of washing operations such as a washing step, a rinsing step, and a dehydrating step, a pulsator disposed in the vehicle, a driving unit that drives the washing tub and the pulsator, a brake mechanism that applies a braking force to the rotation of the washing tub, A control device that executes, whether the control device controls a series of steps and completes the operation based on the setting content input by the user or ends the operation, or has it ended in the middle of the operation , And a storage unit for storing the operation end state of the previous washing operation, and the control unit is configured according to the end state of the previous washing operation stored in the storage unit. The brake mechanism It is to change the control.

  Accordingly, it is possible to adjust the brake operation time when the user turns on the power by changing the control of the brake mechanism according to the end state of the previous washing operation. And even if the lint filter or soft finish automatic spill device is hidden behind the opening of the upper frame, it requires a great amount of power without waiting for the user to turn on the power at the next use. You can easily turn the washing tub without stopping. Therefore, since the lint filter and the soft finish automatic flow-out device can be easily moved to a place where they can be easily operated, usability such as operability and workability can be improved.

The washing machine of the present invention can adjust the brake operation time when the user turns on the power by changing the control of the brake mechanism according to the end state of the previous washing operation. And even if the lint filter or soft finish automatic spill device is hidden behind the opening of the upper frame, it requires a great amount of power without waiting for the user to turn on the power at the next use. You can easily turn the washing tub without stopping. Therefore, since the lint filter and the soft finish automatic flow-out device can be easily moved to a place where they can be easily operated, usability such as operability and workability can be improved.

Side surface sectional drawing of the washing machine in Embodiment 1 of this invention Side sectional view of the speed reduction mechanism of the washing machine in the present embodiment Block circuit diagram of washing machine in the present embodiment Plan view of setting input unit of washing machine in the present embodiment Flowchart of washing machine in the present embodiment Side sectional view of a conventional washing machine Side sectional view of a conventional speed reduction mechanism of a washing machine

  A washing machine according to a first aspect of the present invention is a water tub provided in an outer frame of a washing machine and having a washing tub that can be dehydrated and rotated therein, a pulsator that is rotatably disposed at an inner bottom of the washing tub, A driving unit that drives the washing tub and the pulsator; a brake mechanism that applies a braking force to the rotation of the washing tub; and a control device that executes a series of washing operations such as a washing step, a rinsing step, and a dehydration step, The control device controls a series of processes and detects an end state of whether the operation based on the setting content input by the user is completely executed and ended, or is ended in the middle of the operation And a storage unit that stores the operation end state of the previous washing operation, and the control unit changes the control of the brake mechanism according to the end state of the previous washing operation stored in the storage unit. It is.

  Accordingly, it is possible to adjust the brake operation time when the user turns on the power by changing the control of the brake mechanism according to the end state of the previous washing operation. And even if the lint filter or soft finish automatic spill device is hidden behind the opening of the upper frame, it requires a great amount of power without waiting for the user to turn on the power at the next use. You can easily turn the washing tub without stopping. Therefore, since the lint filter and the soft finish automatic flow-out device can be easily moved to a place where they can be easily operated, usability such as operability and workability can be improved.

  According to a second aspect of the invention, in particular, in the first aspect of the invention, the brake mechanism is configured to apply a braking force to the rotation of the washing tub and operate the brake when the power is not turned on. The unit releases the brake of the brake mechanism after elapse of a first predetermined time or more after the power is turned on, and the first predetermined time according to the end state of the previous washing operation stored in the storage unit. Change the setting. As a result, the laundry tub does not run idle when the power is not turned on, so that the laundry can be taken in and out easily. In addition, the setting of the first predetermined time is changed according to the end state of the previous washing operation, and if the washing tub is stopped at the next use, the setting of the first predetermined time is shortened and the user turns on the power. The washing tub can be easily rotated without requiring a large force in a short time after being put in.

  In a third aspect of the invention, in particular, in the second aspect of the invention, the first predetermined time period is at least when the end state of the previous washing operation stored in the storage unit is an intermediate end, at least for the brake mechanism. It is set to a time longer than the time from when the brake is activated until the rotation of the washing tub stops, and in the case of complete execution, it is set shorter than the set time in the case of completion in the middle It is. As a result, even if the washing operation is terminated in the middle of the washing operation and the power is turned on again, the brake is operated until the washing tub stops, and an unsafe situation does not occur. Further, when the washing tub is stopped, the brake is released in a short time, and after the user turns on the power, the washing tub can be easily rotated without requiring a large force in a short time.

  According to a fourth aspect of the invention, in particular, in the third aspect of the invention, the first predetermined time is substantially equal to a case where the last state of the previous washing operation stored in the storage unit is a complete execution. Is set to 0 seconds. As a result, the user can easily rotate the washing tub without requiring a large force without waiting after the user turns on the power.

  In a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the control unit detects the end state of only the dehydration process in the end state of the previous washing operation. As a result, even if the previous washing operation is terminated halfway, it is assumed that the rotation of the washing tub has stopped unless it is in the middle of the dehydration process, as in the case of the completion after the complete execution. The first predetermined time can be set to a short time. Therefore, the brake is applied to the washing tub for a while after the power is turned on only when it is stopped halfway during the dehydration process of the previous washing operation, and the possibility of waiting for the user is reduced.

  In a sixth aspect of the invention, in particular, in any one of the second to fifth aspects of the invention, the control unit makes a request to start operation after the brake of the brake mechanism is released after the first predetermined time has elapsed. When it is input, if the set operation details require that the brake of the brake mechanism be operated at the start of operation, the brake is operated, and the driving of the drive unit is started after a predetermined time has passed. It is a thing. As a result, when starting the washing operation, it is possible to complete the clutch switching while the brake is reliably operated, and then to drive the motor, and the motor rotates during the switching of the brake and the clutch. Therefore, it is possible to prevent the occurrence of an abnormal noise of clutch switching, the failure of the speed reduction mechanism, and the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a side sectional view of a washing machine according to Embodiment 1 of the present invention. As shown in FIG. 1, the outer frame 1 of the washing machine has a water tank 3 suspended by a suspension bar 2, and a washing / dehydration tank 4 (hereinafter referred to as a washing machine) that serves both as a washing tank and a dewatering tank inside the water tank 3. (Referred to as tank 4) is provided so as to be capable of spin-drying. In the washing tub 4, a pulsator 5 is rotatably disposed at the bottom, and a lower blade 6 is provided integrally with the pulsator 5. The motor 7 is a drive unit that drives the pulsator 5 or the washing tub 4 via the V-belt 8 and the speed reduction mechanism 9.

  The lint circulation water channel 10 and the water spray nozzle circulation water channel 11 are provided so as to extend from the pump chamber 12 on the outer periphery of the lower blade 6 of the pulsator 5 to the upper part of the washing tub 4. 14 are provided. The drain valve 15 drains the washing water in the water tank 3. The water supply valve 16 supplies water into the water tank 3. A lid 18 is provided on the upper frame 17 constituting the upper part of the outer frame 1 so as to be freely opened and closed. Moreover, the control apparatus 19 is provided in the front. In the upper part of the washing tub 4, a fluid balancer 20 for reducing vibration during dehydration is provided, and the fluid balancer 20 is provided with a soft finishing agent automatic outflow device 21.

FIG. 2 is a side sectional view of the speed reduction mechanism of the washing machine in the present embodiment. As shown in FIG. 2, the speed reduction mechanism 9 includes a washing shaft 22 that rotates the pulsator 5 at the time of dehydration and a dehydration shaft 23 that rotates the washing tub 4 that rotate simultaneously, and a switching clutch 24 at the time of the washing process or the rinsing process. As a result, only the washing shaft 22 rotates via the reduction gear 25. A brake wheel 26 provided on the dewatering shaft 23 encloses the reduction gear 25, and a brake band 27 to which a brake shoe 27a is bonded is disposed around the brake wheel 26. As a brake mechanism, the brake shoe 27a is in close contact with the periphery of the brake wheel 26, thereby preventing the laundry tub 4 from rotating together by the rotation of the laundry during the washing process or the rinsing process. Or the rotation of the washing tub 4 is stopped at the end of the dehydration operation, or the brake is always operated when the power is not turned on so that the washing tub 4 does not idle. Specifically, in the brake mechanism, when the electromagnetic drive device 40 (see FIG. 6) is not energized in the OFF state where the power is not turned on, the brake shoe 27a comes into close contact with the brake wheel 26 and brakes the rotation of the washing tub 4. Thus, the brake is activated.

  The operation in the above configuration will be described. During the washing process or the rinsing process, the electromagnetic drive device 40 is turned off to operate the brake. The rotation of the motor 7 is transmitted to the gear shaft 43, the reduction gear 25, the washing shaft 22, and the pulsator 5 through the pulley metal 42. At this time, the brake shoe 27a of the brake band 27 is in close contact with the brake wheel 26, and prevents the laundry tub 4 from rotating together due to the rotation of the laundry. Thereby, the washing tub 4 does not rotate, only the pulsator 5 rotates, and the laundry and the washing water in the washing tub 4 are agitated.

  During the dehydration process, the electromagnetic drive device 40 is turned on, the drain valve 15 is opened, and the switching clutch 24 is switched, whereby the rotation of the motor 7 is transmitted to the pulsator 5 and the washing tub 4 simultaneously. On the other hand, the brake shoe 27a of the brake band 27 is released from the close contact with the brake wheel 26, the brake is released, and the washing tub 4 can rotate.

  As described above, after the washing operation is completed, the brake shoe 27a of the brake band 27 is in close contact with the brake wheel 26 and the brake is activated while the power is OFF.

  FIG. 3 is a block circuit diagram of the washing machine in the present embodiment. As shown in FIG. 3, the control device 19 includes a control unit 58, a setting input unit 59, a power switching unit 60, a storage unit 61, and a display unit 62. The control unit 58 executes a series of washing operations such as a washing process, a rinsing process, and a dehydrating process based on the setting content input by the user using the setting input unit 59. The motor 7 is connected via the power switching unit 60. The electromagnetic drive device 40 that opens and closes the drain valve 15 and the water supply valve 16 are controlled. In addition, the control unit 58 detects an end state of whether the operation based on the setting content input by the user has been completely executed and ended in the previous washing operation, or whether the operation has ended in the middle of the operation. The storage unit 61 stores data necessary for control by the control unit 58, the end state of the previous washing operation, and the like. The display unit 62 displays the contents of control by the control unit 58. The water level detection unit 63 detects the water level in the water tank 3 and inputs the output to the control unit 58. The rotation speed detection unit 64 detects the rotation speed of the motor 7 and inputs its output to the control unit 58. Further, a phase advance capacitor 65 is provided in the motor 7, and a power switch 66 and a commercial power supply 67 are connected.

  The controller 58 also performs a dehydration operation at the end of the washing process and the rinsing process. In the final dehydration process, the rotational speed of the washing tub 4 is, for example, 700r / The motor 7 is controlled so as to be at least min.

FIG. 4 is a plan view of the setting input unit of the washing machine in the present embodiment. The setting input unit 59 includes a washing time setting switch 59a for setting a washing time, a rinse number setting switch 59b for setting the number of times of rinsing, a dehydration time setting switch 59c for setting the dehydration time, and these A course setting switch 59d for setting a combination and a start switch 59e for requesting start and stop of operation are provided. Further, the display unit 62 includes a washing time display unit 62a, a rinse count display unit 62b, a dehydration time display unit 62c, a course setting display unit 62d, a number display unit 62e for displaying remaining time and abnormal contents, and the like. doing.

  FIG. 5 is a flowchart of the washing machine in the present embodiment. The operation will be described with reference to FIG.

  First, when the power is turned on and turned on (Step 1), the control unit 58 activates the power-on timer p and starts measuring time (Step 2). Next, in the previous washing operation, whether the operation based on the setting contents input by the user has been completely executed or ended or whether the operation has ended in the middle of the operation is based on the storage in the storage unit 61. Confirm (Step 3). Then, the end state of the previous operation is determined (Step 4), and the setting of the first predetermined time T1 for operating the brake is changed in the control of the brake mechanism unit. In the case of an end in the middle (Yes in Step 4), the first predetermined time T1 is set to, for example, 15 seconds (Step 5), and in the case of complete execution (No in Step 4), For example, it is set to 1 second (Step 6).

  Here, 15 seconds of Step 5 is set longer than at least the time until the washing tub 4 is stopped by the operation of the brake from the high speed rotation of the dewatering process, and is not limited to 15 seconds. Moreover, about 1 second of Step6, since the washing tub 4 has stopped originally, an unsafe state does not generate | occur | produce, Therefore 0 second may be sufficient. The brake should be released at least after the user turns on the power and before the washing tub 4 is rotated by hand. If it exists, it can be regarded as substantially 0 second.

  Next, the control unit 58 determines whether or not the first predetermined time T1 or more in which the power-on timer p is set has elapsed (Step 7). If the power-on timer p has not yet elapsed for the first predetermined time T1 (No in Step 7), the electromagnetic drive device 40 is left in the OFF state, the brake is activated, and the motor 7 The rotation continues to be transmitted to the pulsator 5 (Step 8).

  On the other hand, when the power-on timer p has already passed the first predetermined time T1 (Yes in Step 7), the electromagnetic drive device 40 is turned on (Step 9), and the brake is released. The state in which the brake is released is continued until the start switch 59e for starting execution of a series of washing operations is pressed in Step 10.

  At this time, since the brake of the washing tub 4 is released, the user can easily rotate the washing tub 4 without requiring a large force. For this reason, even if the lint filter 13 and the soft finish automatic flow-out device 21 are hidden behind the rear surface 17b of the opening 17a of the upper frame 17, they can be moved to a place where they can be easily operated. In other words, the lint filter 13 can be easily removed, and the soft finish can be easily put into the soft finish automatic flow-out device 21, so that the operability and workability can be improved.

  Next, it is determined whether or not the start switch 59e has been pressed (Step 10). If the start switch 59e has not been pressed (No in Step 10), the process returns to Step 7 and is repeated until the start switch 59e is pressed. When the start switch 59e is pressed (Yes in Step 10), the delay timer t is activated to start time measurement. At this time, it does not matter whether the power-on timer p has passed the first predetermined time T1 or more.

Next, the control unit 58 determines whether or not the electromagnetic drive device 40 should be controlled to be in the ON state at the start of operation for the operation content set by the user (Step 12), that is, whether or not the brake should be released. judge. At this time, the operation set by the user needs to release the brake of the washing tub 4 at the start of the operation, such as the dehydration operation in which only the dehydration process is performed, and the electromagnetic drive device 40 is in the ON state. If it should be (Yes in Step 12), the electromagnetic drive device 40 is turned on (Step 13), the brake is released, and the rotation of the motor 7 is transmitted to the pulsator 5 and the washing tub 4. That is, the dehydration process can be started immediately.

  Next, the time of the delay timer t is determined (Step 14). When the delay timer t has not passed the second predetermined time T2 (for example, 0.1 second), the process is repeated until the delay timer t has passed the second predetermined time T2. Then, when the delay timer t has exceeded the second predetermined time T2 (Yes in Step 14), the set washing operation (in this embodiment, dehydration operation) is started (Step 15). After performing the dehydration operation for a predetermined time, the dehydration operation is terminated. At this time, the electromagnetic drive device 40 is finally turned off, the brake is activated, and the power supply is automatically cut off.

  In Step 12, the operation set by the user needs to operate the brake of the washing tub 4 at the start of the operation, for example, a course operation started from the washing process or the rinsing process. If the device 40 should be in the OFF state (No in Step 12), it is determined whether or not the current electromagnetic drive device 40 is in the ON state (Step 16), that is, whether or not the brake is released.

  If it is determined that the electromagnetic drive device 40 is in the ON state with the brake released (Yes in Step 16), the electromagnetic drive device 40 is turned off (Step 17). By turning off the electromagnetic drive device 40, the drain valve 15 is closed, the brake to the washing tub 4 is activated, and the rotation of the motor 7 is transmitted to the pulsator 5.

  Next, the time of the delay timer t is determined (Step 18). When the delay timer t has not passed the third predetermined time T3 (for example, 2 seconds) (No in Step 18), the delay timer t is repeated until the third predetermined time T3 has passed. When the delay timer t has exceeded the third predetermined time T3 (Yes in Step 18), the laundry amount is detected (Step 19). That is, the controller 58 rotates the pulsator 5 by driving the motor 7 so as to be reversed left and right a predetermined number of times, and the rotational speed detector 64 measures the deceleration rate of the rotational speed of the motor 7 at that time. Detect the amount of laundry.

  Thereafter, the control unit 58 sets the water level corresponding to the detected amount of laundry, the washing time in the washing process, the inversion time of the pulsator 5, the rinsing time in the rinsing process, the number of times of rinsing, the time of the dehydration process, etc. A set of washing operations are executed. After a series of washing operations are completed, the washing operation is terminated. At this time, the electromagnetic drive device 40 is finally turned off, the brake is activated, and the power supply is automatically cut off.

Here, the third predetermined time T3 will be described. At Step 17, the electromagnetic drive device 40 is changed from the ON state to the OFF state, the drain valve 15 is closed, the brake shoe 27a of the brake band 27 is brought into close contact with the brake wheel 26, and the brake is operated to the washing tub 4. The rotation of the motor 7 is transmitted to the pulsator 5. A predetermined time is required to reach this state. If the motor 7 is driven to detect the amount of laundry before the predetermined time elapses, the brake is not applied to the washing tub 4 and the rotation of the motor 7 is transmitted to the pulsator 5. The motor 7 starts to rotate in a state before the state is reached. In this state, since the rotation of the motor 7 is initially transmitted to the pulsator 5 and the washing tub 4, the dewatering shaft 23 and the switching clutch 24 are rotating. In this state, the brake is activated, When the switching clutch 24 is switched, a loud sound is generated when the brake is operated, or a loud hitting sound is generated when the switching clutch 24 is switched. In addition, a load may be applied to the speed reduction mechanism 9 to cause a failure.

  Therefore, after the electromagnetic driving device 40 is turned off, the brake is surely operated in the washing tub 4 and the rotation of the motor 7 is a time longer than a predetermined time until the rotation is transmitted to the pulsator 5. The above problem can be prevented by delaying the driving of the motor 7 by the third predetermined time T3.

  On the other hand, if it determines with the electromagnetic drive device 40 being an OFF state in Step16 (No of step 16), the control part 58 will continue the electromagnetic drive device 40 in an OFF state (Step21). Since the electromagnetic drive device 40 remains in the OFF state, the drain valve 15 is closed, the brake is operated to the washing tub 4, and the rotation of the motor 7 is transmitted to the pulsator 5.

  Next, the time of the delay timer t is determined (Step 22). If the delay timer t has not exceeded the fourth predetermined time T4 (for example, 0.1 second) (No in Step 22), the process is repeated until the delay timer t has passed the fourth predetermined time T4. Here, since the brake is not released, the electromagnetic drive device 40 is already in the OFF state, so that the brake has already been operated in the washing tub 4 and the rotation of the motor 7 is transmitted to the pulsator 5. It has become. Therefore, even if the motor 7 is driven immediately in order to detect the amount of laundry, a loud sound is generated when the brake is operated as described above, or a loud hit sound when the switching clutch 24 is switched. There is no problem that it occurs or a load is applied to the speed reduction mechanism 9 to cause a failure. Therefore, a time shorter than the third predetermined time T3 is sufficient for the fourth predetermined time T4 until the motor 7 is driven.

  In addition, when the delay timer t has exceeded the fourth predetermined time T4 (Yes in Step 22), the laundry amount is detected (Step 19), and the amount of laundry is detected. Thereafter, the control unit 58 sets the water level corresponding to the detected amount of laundry, the washing time in the washing process, the inversion time of the pulsator 5, the rinsing time in the rinsing process, the number of times of rinsing, the time of the dehydration process, etc. A set of washing operations are executed. After a series of washing operations are completed, the washing operation is terminated. At this time, the electromagnetic drive device 40 is finally turned off, the brake is activated, and the power supply is automatically cut off.

  As described above, the brake is released after the first predetermined time T1 or more has elapsed since the power is turned on, and the washing tub 4 can be rotated, so that the lint filter is removed for cleaning or the soft finish. Usability can be improved, for example, the workability when turning on the power is only possible by pressing the button once to turn on the power. Further, after the start request is input from the start switch 59e, the electromagnetic drive device 40 is turned off, and after the third predetermined time T3 has elapsed, the driving of the motor 7 for executing the laundry amount detection is started. By doing so, it is possible to prevent a loud noise when the brake is operated, a loud noise when the switching clutch 24 is switched, and a load applied to the speed reduction mechanism 9 to cause a failure. be able to.

  Further, when a request for starting operation is input from the start switch 59e, if the brake is not released, the laundry amount detection is performed after a fourth predetermined time T4 which is shorter than the third predetermined time T3 has elapsed. Since the motor 7 can be driven in a shorter time by starting the control of the motor 7 for executing the operation, the operation time can be shortened and the usability can be improved. Further, the operation of the motor 7 can be immediately inspected even when inspection is performed in a factory or when a serviceman performs repairs.

  In addition, when the first predetermined time T1 or more has elapsed after the power is input, the operation content set by the setting input unit 59 should control the electromagnetic drive device 40 to the ON state at the start of operation (for example, dehydration operation) In the case where the operation start request is input from the start switch 59e, the electromagnetic drive device 40 is kept in the ON state and after a second predetermined time T2 shorter than the third predetermined time T3 has elapsed. By starting the drive of the motor 7, the motor 7 can be driven in a shorter time, so that the operation time can be shortened and the usability can be improved.

  The second predetermined time T2, the third predetermined time T3, and the fourth predetermined time T4 described in the present embodiment are merely examples, and the second predetermined time T2 is greater than the third predetermined time T3. If it is shorter, the same effect can be obtained. Further, if the fourth predetermined time T4 is shorter than the third predetermined time T3, the same effect can be obtained. At this time, the second predetermined time T2 and the fourth predetermined time T4 may be 0 seconds.

  Moreover, although the control part 58 demonstrated in the completion | finish state of the last washing operation, without limiting a process in particular, you may make it detect only the completion | finish state of a dehydration process. As a result, even if the previous washing operation is terminated halfway, it is assumed that the rotation of the washing tub has stopped unless it is in the middle of the dehydration process, as in the case of the completion after the complete execution. The first predetermined time can be set to a short time. Therefore, the brake is applied to the washing tub for a while after the power is turned on only when it is stopped halfway during the dehydration process of the previous washing operation, and the possibility of waiting for the user is reduced.

  As described above, the control device for the washing machine of the present invention controls a series of processes and completes the operation based on the setting content input by the user, or ends the operation, or during the operation. It has a control part which detects the end state of whether it was completed, and a storage part which memorizes the operation end state of the last washing operation, and the control part is the end state of the last washing operation memorized by the storage part To change the control of the brake mechanism.

  Accordingly, it is possible to adjust the brake operation time when the user turns on the power by changing the control of the brake mechanism according to the end state of the previous washing operation. And even if the lint filter or soft finish automatic spill device is hidden behind the opening of the upper frame body, a large amount of force is required in a short time after the user turns on the power at the next use. You can easily turn the washing tub without stopping. Therefore, since the lint filter and the soft finish automatic flow-out device can be easily moved to a place where they can be easily operated, usability such as operability and workability can be improved.

  Further, the brake mechanism of the washing machine of the present invention is configured to operate the brake by applying a braking force to the rotation of the washing tub when the power is not turned on, and the control unit is turned on after the power is turned on. After the elapse of the first predetermined time or more, the brake of the brake mechanism is released, and the setting of the first predetermined time is changed according to the end state of the previous washing operation stored in the storage unit. As a result, the laundry tub does not run idle when the power is not turned on, so that the laundry can be taken in and out easily. In addition, the setting of the first predetermined time is changed according to the end state of the previous washing operation, and if the washing tub is stopped at the next use, the setting of the first predetermined time is shortened and the user turns on the power. In a short time after being put in, the washing tub can be easily rotated without requiring a large force.

In addition, when the end state of the previous washing operation stored in the storage unit is in the middle of the first predetermined time, at least after the brake of the brake mechanism is actuated until the rotation of the washing tub stops In the case of completion after complete execution, the time is set shorter than the set time for completion in the middle. As a result, even if the washing operation is terminated in the middle of the washing operation and the power is turned on again, the brake is operated until the washing tub stops, and an unsafe situation does not occur. Further, when the washing tub is stopped, the brake is released in a short time, and the washing tub can be easily rotated without requiring a large force in a short time after the user turns on the power.

  Further, the first predetermined time is substantially set to 0 seconds when the end state of the previous washing operation stored in the storage unit is the complete end. The brake should be released at least after the user turns on the power and before the laundry tub is rotated by hand. In other words, it can be regarded as substantially 0 seconds. As a result, the user can easily rotate the washing tub without requiring a large force without waiting after the user turns on the power.

  Moreover, the control part of the washing machine of this invention detects about the completion state of only a dehydration process in the completion state of the last washing operation. As a result, even if the previous washing operation is terminated halfway, it is assumed that the rotation of the washing tub has stopped unless it is in the middle of the dehydration process, as in the case of the completion after the complete execution. The first predetermined time can be set to a short time. Therefore, the brake is applied to the washing tub for a while after the power is turned on only when it is stopped halfway during the dehydration process of the previous washing operation, and the possibility of waiting for the user is reduced.

  The controller of the washing machine of the present invention may be configured such that when a request for starting operation is input after the brake of the brake mechanism has been released after the first predetermined time has elapsed, When it is necessary to operate the brake of the brake mechanism at the start, the brake is operated, and after a predetermined time has elapsed, the driving of the drive unit is started. As a result, when starting the washing operation, it is possible to complete the clutch switching while the brake is reliably operated, and then to drive the motor, and the motor rotates during the switching of the brake and the clutch. Therefore, it is possible to prevent the occurrence of an abnormal noise of clutch switching, the failure of the speed reduction mechanism, and the like.

  As described above, the washing machine according to the present invention changes the control of the brake mechanism according to the end state of the previous washing operation stored in the storage unit, and improves the usability of the washing machine having the brake mechanism. Useful.

DESCRIPTION OF SYMBOLS 1 Outer frame 3 Water tank 4 Washing tank 5 Pulsator 7 Motor (drive part)
19 control device 22 washing shaft 23 dewatering shaft 24 switching clutch 26 brake wheel (brake mechanism)
27 Brake band (brake mechanism)
27a Brake shoe (brake mechanism)
40 Electromagnetic drive (brake mechanism)
58 control unit 59 setting input unit 61 storage unit

Claims (6)

A water tub having a washing tub disposed in an outer frame of the washing machine and capable of spin-drying inside, a pulsator rotatably disposed at an inner bottom portion of the washing tub, and a drive for driving the washing tub and the pulsator A brake mechanism that applies a braking force to the rotation of the washing tub, and a control device that performs a series of washing operations such as a washing step, a rinsing step, and a dehydrating step,
The controller is
A control unit that controls a series of steps and detects whether the operation based on the setting contents input by the user has been completely executed and ended, or whether the operation has ended in the middle of the operation,
A storage unit for storing the operation end state of the previous washing operation,
The control unit changes the control of the brake mechanism according to the end state of the previous washing operation stored in the storage unit.
A washing machine characterized by that. The brake mechanism is configured to actuate the brake by adding a braking force to the rotation of the washing tub when the power is not turned on,
The control unit releases the brake of the brake mechanism after elapse of a first predetermined time or more after the power is turned on, and the first predetermined operation is performed according to the end state of the previous washing operation stored in the storage unit. Change time settings,
The washing machine according to claim 1. The first predetermined time is
The end state of the previous washing operation stored in the storage unit is
In the case of an end in the middle, it is set to a time longer than at least the time from when the brake of the brake mechanism is activated until the rotation of the washing tub stops.
In the case of complete execution, it will be set shorter than the set time in the case of completion in the middle.
The washing machine according to claim 2. The first predetermined time is substantially set to 0 seconds when the end state of the previous washing operation stored in the storage unit is complete execution.
The washing machine according to claim 3. The control unit detects the end state of only the dehydration process in the end state of the previous washing operation,
The washing machine according to any one of claims 1 to 4. The controller is configured such that when a request for starting operation is input after the brake of the brake mechanism is released after the first predetermined time or more has elapsed, the set operation content is When it is necessary to operate the brake, the brake is operated, and the driving of the drive unit is started after a predetermined time has passed.
The washing machine according to any one of claims 2 to 5.

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