JP2014171564A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of reducing wrinkles on clothes even if power failure occurs in dewatering operation.SOLUTION: The washing machine includes: a power shut-off detection means 64 for detecting a shut-off of power and a turning-off of a power supply switch; a nonvolatile memory 65 for storing the content of an operation setting and a progress stage of an operation being executed; and control means 66 for controlling a motor 49 and successively controlling a series of steps of washing, rinsing, and dewatering. The control means 66 restarts an operation from the progress stage of the operation being executed which the nonvolatile memory 65 has stored when power is turned on again after power is shut off not by a normal finish of an operation or a turning-off of the power supply switch, and in the case where the progress stage of an operation being executed which the nonvolatile memory 65 has stored is a dewatering step, the control means 66 restarts the operation from a rinsing step. Thus, it is possible to provide clothing with less wrinkling even if a power shut-off occurs due to a power failure and the like in a dewatering step operation and to improve washing qualities.

Description

  The present invention relates to a washing machine that performs automatic control of washing, rinsing, and dewatering processes.

  Conventionally, when this type of washing machine has a power failure during operation, the operation state at that time is stored in a non-volatile memory, and when the power is restored thereafter, the operation state stored in the non-volatile memory is stored. A configuration for resuming operation has been proposed (see, for example, Patent Document 1).

  FIG. 5 is a control block diagram of the conventional washing machine described in Patent Document 1. In FIG.

  In FIG. 5, the operation control circuit is connected to a non-volatile memory such as an EEPROM 36 as a storage means. The control circuit 31 operates the “power off” key switch 25 of the operation unit (not shown) during the washing operation. When is turned on, and the voltage detection circuit 34 detects a voltage equal to or lower than a predetermined voltage, the operation state at that time is stored in the EEPROM 36. Therefore, the operation control circuit functions as a detection means for detecting power-off by using the operation of the “power-off” key switch 25 for turning off the relay 30 as a power switch and the voltage detection circuit 34 as a voltage detection means.

  In addition, the commercial power supply may fail during the washing operation, or the power plug 29 may be accidentally pulled out from the outlet. In this case, since the detection voltage of the voltage detection circuit 34 detects a predetermined voltage or less, the operation control circuit stores the operation state at that time in the EEPROM 36 by feeding a capacitor (not shown) as a backup power source.

  When the commercial power supply is restored or the power plug 29 is plugged into an outlet, a special key operation is performed on the operation unit, so that the relay 30 is turned on and the washing operation is started from a state where the power is cut off. Let it resume.

Japanese Patent Laid-Open No. 7-275561

  However, in the above-described conventional configuration, when the power is cut off due to a power failure or the like during the dehydration process operation, even if the clothes are left for a long time with the power off, the operation is resumed from the state where the dehydration process is stopped after the power is restored. For this reason, wrinkles due to being left off while the power is turned off remain in the clothes after washing, and particularly in cotton clothes, the wrinkles are remarkable and there is a problem that the washing quality is impaired.

  The present invention solves the above-mentioned conventional problems, and when a power interruption occurs due to a power failure or the like during the dehydration process operation, the dehydration process operation is restarted after adding a rinsing process before the dehydration process, An object of the present invention is to provide a washing machine that reduces wrinkles remaining on clothes after washing and improves washing quality.

In order to solve the above-described conventional problems, a washing machine of the present invention includes a washing and dewatering tub in which a pulsator is rotatably arranged at a center bottom, a motor that rotationally drives the pulsator and the washing and dewatering tub, and a power source Power interruption detection means for detecting interruption and turning off of the power switch, nonvolatile memory for storing the operation setting contents and the progress stage during operation execution, and a series of steps of controlling, washing, rinsing and dehydrating the motor. Control means for sequentially controlling, the control means stored in the non-volatile memory when the power is turned on again after the power is turned off instead of the end of normal operation or power switch off The operation is resumed from the progress stage during the operation, and when the progress stage during the operation stored in the nonvolatile memory is a dehydration process, the operation is resumed from the rinsing process. It is characterized in that the the.

  Thereby, even when a power interruption occurs due to a power failure or the like during the dehydration process operation, wrinkles remaining on the clothes after the washing is reduced, and washing quality can be improved.

  The washing machine of the present invention can reduce wrinkles of clothes in the operation after the power is restored even when the power is interrupted due to a power failure or the like during the dehydration process.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Control block diagram of the washing machine Control flow chart at the time of power-off detection of the washing machine Control flowchart when power input is detected in the washing machine Control block diagram of a conventional washing machine

  According to a first aspect of the present invention, there is provided a washing / dehydrating tub in which a pulsator is rotatably arranged at the center bottom, a motor for rotationally driving the pulsator and the washing / dehydrating tub, and a power shutoff for detecting power shutoff and power switch off The control means comprising: a detection means; a nonvolatile memory for storing operation setting contents and a progress stage during operation execution; and a control means for controlling the motor and sequentially controlling a series of steps of washing, rinsing and dehydration. The means restarts the operation from the progress stage during execution of the operation stored in the nonvolatile memory when the power is turned on again after the normal operation is finished or the power switch is turned off instead of turning off the power switch. When the progress stage during the operation stored in the non-volatile memory is a dehydration process, the operation is restarted from the rinsing process. Even if the power-off occurs due to power failure, the wrinkles remain in the laundry after washing completion is reduced, thereby improving the washing quality.

  Hereinafter, embodiments of the 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 longitudinal sectional view of a washing machine according to an embodiment of the present invention.

  In FIG. 1, a casing 41 elastically suspends an outer tub 43 by a plurality of suspensions 42 inside. The washing / dehydrating shaft 44 is hollow and has a biaxial structure. The washing and dewatering tub 45 has a number of dewatering holes (not shown) on the side wall, a fluid balancer 46 for vibration reduction at the upper part of the inner periphery, and a pan-shaped pan with an outer periphery inclined at the center bottom. A clothes stirring pulsator 47 formed in a shape is disposed.

  The transmission mechanism 48 incorporates a reduction gear (not shown) during washing. The motor 49 is attached to the bottom of the outer tub 43 and rotates the pulsator 47 and the washing / dehydrating tub 45 via the transmission mechanism 48.

  An upper frame 40 is mounted on the upper portion of the housing 41, and an operation display section 67 for performing various input settings and displaying the setting contents is disposed on the front portion of the upper frame 40. A control device 60 is accommodated inside the operation display unit 67.

  FIG. 2 shows a control block diagram of the washing machine in the embodiment of the present invention.

  In FIG. 2, the control device 60 controls the operations of the motor 49, the clutch (not shown), the drain valve (not shown), the water supply valve (not shown) and the like via the load driving means 62. And a control means 66 for sequentially controlling a series of steps of rinsing and dehydration.

  The control means 66 is composed of a microcomputer or the like, and is turned on from a commercial power supply 61 by turning on a power switch of an operation display section 67 composed of input setting means 68 such as a power switch (not shown) and display means 69. The operation is started when power is supplied, the output of a water level detecting means (not shown) and the power input detecting means 63 is inputted, and the display means is based on the contents set by the input of the user by the input setting means 68. The setting contents are displayed on 69, and the operation of the motor 49, clutch, drain valve, water supply valve, etc. is controlled via the load driving means 62 constituted by a bidirectional thyristor, a relay, etc. These steps are sequentially controlled.

  Further, when the commercial power supply 61 is cut off during the process operation or the power supply plug is accidentally pulled out from the outlet, and the power supply is cut off, the power cut-off detection means 64 detects it and the control means 66 The operation state when the power is shut off is stored in the non-volatile memory 65 as a storage means.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated.

  FIG. 3 is a control flowchart at the time of power-off detection of the washing machine in the embodiment of the present invention, and FIG. 4 is a control flowchart at the time of power-input detection of the washing machine.

  In FIG. 3, when the process operation is being performed, the control means 66 of the control device 60 detects that the power supply has been cut off from the power cut-off detection means 64 by a zero cross detection circuit or the like. It is determined whether or not the power supply is interrupted by the information from the input setting means 68 of the unit 67 (step S1).

  If the control means 66 is information from the input setting means 68 (Y in step S1), the power supply to the motor 49 is stopped (step S3) and the brake is applied for safety in the same manner as at the end of the normal process. (Step S4), after detecting the rotation stop (Step S5), the end of the process is displayed on the display means 69, and the process is terminated.

  If the power shutdown is not information from the input setting means 68 (N in Step S1), the current positive information is written in the nonvolatile memory 65 (Step S2), and the process proceeds to Step S3.

  In FIG. 4, when power is re-input and a signal is input again from the power input detection means 63 and power recovery is detected, the nonvolatile memory 65 is read (step S <b> 11), and a determination of the situation when the previous power is shut off is performed. When (Step S12) is performed and it is determined that the previous stop state is the end of normal operation or that the power switch is not turned off and the power is cut off (Y in Step S12), the process is confirmed (Step S13). )I do.

If the stop process is not the dehydration process (N in step S13), the process is restarted from the process stored in the nonvolatile memory 65 (step S16), and the stop process is the dehydration process (step S16). In step S13 Y), the rinsing process is performed once again (step S14), and then the process proceeds to the dehydration process (step S15).

  When it is determined that the previous stop state is the end of normal operation or the power switch of the input setting means 68 is turned off and there is no power failure (N in Step S12), the initial standby waiting for input from the input setting means 68 The state is shifted (step S17). Thereby, even if the power is cut off due to a power failure or the like during the dehydration process operation, it is reduced that severe wrinkles remain on the clothes after the operation is completed.

  The non-volatile memory 65, the power input detection means 63, and the power interruption detection means 64 may be built in the control means 66.

  As described above, during operation of the dehydration process, when the operation is stopped because the power is shut off without completing the normal operation or when the power switch is not turned off, the dehydration is performed when the power is turned on again. By adding a rinsing process before the process and restarting the operation, even if a power interruption occurs due to a power failure, etc. during the dehydration process operation, wrinkles remaining on the clothes after washing is reduced, The washing quality can be improved.

  As described above, the washing machine according to the present invention can reduce severe wrinkles remaining on clothes after washing and improve washing quality even when the power is cut off due to a power failure or the like during the dehydration process operation. Therefore, it can be applied to other washing machines such as a drum type washing machine that requires a dehydration step.

45 Washing and Dewatering Tank 47 Pulsator 49 Motor 60 Controller 64 Power-off Detection Unit 65 Nonvolatile Memory 66 Control Unit

Claims (1)

A washing and dewatering tub with a pulsator rotatably arranged at the center bottom,
A motor that rotationally drives the pulsator and the washing and dewatering tub;
Power-off detection means for detecting power-off and power-off switch;
Non-volatile memory that stores the operation settings and the progress stage during operation,
Control means for controlling the motor, sequentially controlling a series of steps of washing, rinsing and dehydration,
The control means is not the end of normal operation or the power switch is turned off, but the power is shut off,
When the power is turned on again,
Resuming operation from the progress stage during execution of operation stored in the nonvolatile memory,
When the progress stage during execution of the operation stored in the nonvolatile memory is a dehydration process,
A washing machine characterized in that operation is resumed from the rinsing process.