JP2017012630A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety even when imbalance occurs from the middle of dewatering and abnormal vibration occurs.SOLUTION: In a dewatering step for performing intermittent dehydration which is controlled by turning ON/OFF electric conduction to a motor 5 and continuous dewatering after the intermittent dehydration, when it is determined that the rotational frequency of a washing and dewatering tub 1 detected by a rotational frequency detector 11 has decreased by a predetermined value or greater, the electric conduction to the motor 5 is stopped, the dewatering step is stopped and a correction rinsing step is performed for correcting an imbalanced state of clothing in the washing and dewatering tub 1, and then, the dewatering step is operated again. With this constitution, even when imbalance occurs in the middle of dewatering, while dewatering clothes including a lot of clothes which contain a lot of moisture, such as a fleece material, the operation is stopped before abnormal vibration and product movement occur and the correction rinsing is performed, so that safety can be improved.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine that performs washing, rinsing, and dehydration processes.

  Conventionally, this type of washing machine has been proposed a dehydration control method that does not cause abnormal vibration during dehydration even when the laundry is in an unbalanced state in the washing and dehydrating tub (for example, Patent Document 1). reference).

  FIG. 3 is a functional block diagram of a conventional dehydration control device for a washing machine described in Patent Document 1, and FIG. 4 is a flowchart of a safety mechanism during the dehydration process of the washing machine.

  3 and 4, an unbalance detection device 60 that detects abnormal vibrations by the amplitude of a washing and dehydrating tub (not shown) that is rotatably supported in an outer box (not shown) and accommodates laundry, A rotational speed detection device 49 for detecting the rotational speed of the washing / dehydrating tub, and a dehydration control device 61 for controlling the operation of the washing / dehydrating tub from the detection state of the unbalance detection device 60 according to the rotational speed of the washing / dehydrating tub Is provided. The dehydration control device 61 counts the number of times of abnormal vibration detected by the unbalance detection device 60 and the operating state determination means 62 for determining whether the washing / dehydration tub is in an activated state or a steady operation state from the rotation speed of the washing / dehydration tub. An abnormal vibration counting means 63, and an activation state stopping means 64 for stopping the rotation of the washing and dehydrating tub when the number of times of detection of abnormal vibration exceeds a predetermined number when the washing and dehydrating tub is activated. In addition, there is a steady state stop means 65 for stopping the washing / dehydrating tub when the unbalance detection device 60 is activated when the washing / dehydrating tub is in a steady operation state.

  In the above configuration, at the time of dehydration, the washing liquid is drained, and the washing and dewatering tub is rotated at high speed to perform dehydration. From the start of dehydration until the rotation speed of the washing and dewatering tub is 100 rpm or less, the abnormal vibration counting means 63 The number of operations due to abnormal vibration of the unbalance detection device 60 is read, but the operation as a safety mechanism (that is, the motor 42 is not stopped) is not performed. It is determined that unbalance has occurred, and the motor 42 is stopped.

  Also, if the washing / dehydrating tub reaches a rotational speed greater than 100 rpm during the number of operations up to two times, the steady-state stopping means 65 thereafter stops depending on whether or not the unbalance detection device 60 is operating, or shifts to high speed rotation. If no abnormal vibration occurs, dehydration is terminated after a predetermined time.

  FIG. 5 is a graph showing the rotation speed and elapsed time of the washing and dewatering tub when dehydration is started in a conventional washing machine.

  In FIG. 5, two types of patterns are shown: a combination of clothing that does not include a fleece material clothing and a combination of clothing that includes a fleece material.

In the combination of clothes containing fleece material, even if it is unbalanced in the washing and dehydrating tank at the start of dehydration, the fleece material stands up in a good balance due to its high water content and heavy moment of inertia. As soon as the rotation speed reaches 700 rpm, which is the steady rotation speed, water is removed from the clothing, the unbalanced state becomes severe, the vibration system shakes greatly, and the water tank (in which the washing / dehydration tank is rotatably included) A hit of a housing (not shown) with a housing (not shown) occurred. Due to this imbalance, the rotation speed of the washing and dewatering tank decreases,
Compared to the case of clothes that do not contain a fleece that is rotating in a well-balanced manner, the maximum speed is reduced by 200 rpm. And after the contact with the housing | casing of a water tank continues, the unbalance detection apparatus 60 operate | moves and the motor 42 has stopped.

  FIG. 6 is a graph showing the rotation speed and elapsed time of the washing and dewatering tub when dehydration is started in a conventional washing machine.

  In FIG. 6, the difference from FIG. 5 is that the water tank hits the casing due to unbalance, but because the way of hitting is weak, the rotational speed does not decrease, and even if a predetermined time elapses. The maximum number of revolutions has not been reached. And when predetermined time passes, a motor will stop and a spin-drying | dehydration process will be complete | finished.

Japanese Patent Laid-Open No. 5-15694

  However, in the conventional configuration, if the dehydration is done with a combination of clothes containing a lot of fleece materials that have been increasing due to lifestyle changes in recent years (3 to 5 sheets), the fleece materials will contain a lot of water, and the fleece materials will Since moisture is drained over time from clothing made of other materials, even when the clothing is heavy, balanced and rises smoothly at startup, the rotation speed of the washing and dewatering tank rises and the fleece material starts. When moisture is removed, unbalance is generated and abnormal vibration occurs. In the worst case, there is a safety problem that the product may move without the safety switch working.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine capable of improving safety by stopping operation more reliably even when an imbalance occurs. .

  In order to solve the above-described conventional problems, the washing machine of the present invention includes a washing / dehydrating tub for storing clothes, a water receiving tub for rotatably enclosing the washing / dehydrating tub, and a drive mechanism unit. A motor for rotationally driving the washing and dewatering tub, a water supply valve for supplying water to the water receiving tub, a rotational speed detector for detecting the rotational speed of the drive mechanism section and outputting it to the rotational speed detection control section, and the rotational speed detection And a control means for controlling the motor, the water supply valve and the like by inputting a signal from a control section and the like, and controlling each step of washing, rinsing and dehydration, and the control means turns on the energization to the motor, When it is determined that the rotational speed of the washing and dewatering tub detected by the rotational speed detector has decreased by a predetermined value or more during the dehydration process in which intermittent dewatering to be controlled off and continuous dehydration after intermittent dewatering are performed, Stop energization, stop the dehydration process, and After performing the correction rinsing cycle to correct the unbalanced state of the clothes in and dewatering tank, it is intended to operate again dehydrating operation.

  Thereby, even if imbalance occurs, safety can be improved by stopping the operation more reliably.

  Even if imbalance occurs, the washing machine of the present invention can improve safety by stopping operation more reliably.

Functional block diagram of a washing machine in an embodiment of the present invention Control flowchart for dehydrating the washing machine Functional block diagram of a conventional dehydration control device for a washing machine Flow chart of safety mechanism during dehydration process of the washing machine Graph showing the number of rotations and time of the washing and dehydration tank at the start of dehydration of the washing machine Graph showing the number of rotations and time of the washing and dehydration tank at the start of dehydration of the washing machine

  A first invention includes a washing and dewatering tub for storing clothes, a water receiving tub that rotatably includes the washing and dewatering tub, a motor that rotationally drives the washing and dewatering tub via a drive mechanism, A water supply valve for supplying water to the water receiving tank, a rotational speed detector for detecting the rotational speed of the drive mechanism section and outputting it to the rotational speed detection control section, and a signal from the rotational speed detection control section, etc. A control means for controlling a motor, a water supply valve, etc., and controlling each process of washing, rinsing, and dehydration, and the control means performs intermittent dehydration for controlling on / off of energization to the motor and continuous after intermittent dehydration. In the dehydration process for performing dehydration, when it is determined that the rotation speed of the washing and dewatering tub detected by the rotation speed detector has decreased by a predetermined value or more, energization of the motor is stopped and the dehydration process is stopped to stop the dehydration process. Unbalanced clothing in the laundry / dehydration tub After performing the correction rinsing cycle to correct, it is intended to operate again dehydrating operation.

  As a result, even when an imbalance occurs during dehydration of clothing containing a lot of moisture, such as clothing containing a lot of fleece material, the operation is stopped and corrected before abnormal vibration or product movement occurs, Safety can be improved.

    In the second invention, in particular, the control means of the first invention is configured to determine whether or not the number of rotations of the washing and dewatering tub has decreased by a predetermined value after reaching the predetermined number of rotations or more. Even if clothes that contain a lot of moisture, such as clothes that contain a lot of fleece material, are unbalanced during dehydration, the unbalanced state is reliably detected and operation is stopped before abnormal vibration or product movement occurs. A modified rinse can be performed to improve safety.

  In a third aspect of the invention, in particular, when the control means of the first aspect of the invention is shifted to continuous dehydration after intermittent dehydration, it is determined whether or not the rotational speed of the washing and dehydrating tub has decreased by a predetermined value or more. Therefore, even when clothes that contain a lot of moisture, such as clothes that contain a lot of fleece material, are unbalanced during dehydration, the unbalanced state is detected reliably and driving before abnormal vibration or product movement occurs. The safety can be improved by stopping and performing a correct rinse.

  The fourth invention, in particular, when the control means of any one of the first to third inventions has not reached the maximum rotational speed set by the washing and dewatering tub even after a predetermined time has elapsed after the start of the dehydration process, After the dehydration process is stopped and the modified rinsing process is performed, the dehydration process is operated again, so that an imbalance occurs during the dehydration of clothes containing a lot of moisture, such as clothes containing a lot of fleece materials. However, it is possible to improve the safety by reliably detecting the unbalanced state and stopping the operation and rinsing before the abnormal vibration or product movement occurs.

  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 functional block diagram of a fully automatic washing machine according to an embodiment of the present invention.

In FIG. 1, the washing and dewatering tub 1 has a large number of drain holes 1a on the peripheral wall, and a pulsator 2 is rotatably arranged at the center bottom. The water receiving tub 3 containing the washing / dehydrating tub 1 has a water receiving tub receiving 4 fixed to the outer bottom, a driving motor 5, a drain valve 6, and a driving mechanism 7 are provided. The outer edge portion of the housing 10 is supported by a vibration-proof device 8 and a suspension rod 9 from the upper corner of the housing 10 in a hanging vibration-proof manner.

  The rotational speed of the drive mechanism section 7 is detected by the rotational speed detector 11, and the output of the rotational speed detector 11 is input to the control means 13 via the rotational speed detection control section 12.

  The output of the water level detector 14 that detects the water level in the water receiving tank 3 is input to the control means 13 via the water level detection control unit 15.

  The control means 13 is constituted by a microcomputer, and includes a motor control means 16 that controls energization of the motor 5, a drain valve control means 17 that controls opening / closing of the drain valve 6, and a water supply valve that supplies water into the washing / dehydrating tub 1. A command signal is output to the 18 water supply valve control means 19. Further, the control means 13 has a cloth amount detection means 20 for determining the cloth amount based on the output data of the rotation speed detection control section 12, and further a functional means of a stroke control means 21. These functional means are realized by a program of a microcomputer. Here, the stroke control means 21 executes washing, rinsing, and dehydration processes under the control of various control means based on the operation contents automatically set by the cloth amount detection means 20 or the setting contents from the setting means 22.

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

  FIG. 2 is a control flowchart at the time of dehydration of the washing machine in the embodiment of the present invention.

  In FIG. 2, when the dehydration process starts, in order to gradually remove the moisture contained in the clothes, first, the motor 5 is turned on and off repeatedly, and the number of revolutions is increased by controlling the time limit. Intermittent dehydration is performed (step S1). When intermittent dewatering starts, first, the rotation speed of the washing and dewatering tub 1 is increased to 200 rpm (step S2). Next, in step S3, the rotational speed is increased to 300 rpm, and in step S4, the rotational speed is increased to 500 rpm. Next, the rotational speed is increased to 600 rpm in step S5.

  In step S6, it is determined whether or not the rotational speed has increased to 600 rpm. If the rotational speed has increased to 600 rpm (Y in step S6), intermittent dehydration is terminated (Y in step S7), and the steady dewatering state is reached. The continuous dehydration is started (step S8). When the continuous dehydration starts, the operation is performed by increasing the rotation speed to 700 rpm (step S9).

  Here, when the rotational speed does not reach 600 rpm in Step S6 (N in Step S6), the process proceeds to Step S14, and the rotational speed that is decreasing (insufficient) with respect to the rotational speed 600 rpm is 100 rpm or more. If the rotational speed has decreased by 100 rpm or more (Y in step S14), the process proceeds to step S17, the dehydration operation is stopped, and the process proceeds to the corrected rinsing process (step S18). If the decreasing rotation speed is 100 rpm or less (N in Step S14), the process returns to Step S6.

  In the corrected rinsing process, the water supply valve 18 is driven, water is supplied to the washing and dewatering tub 1, the pulsator 2 is rotated, and the agitation operation is performed to eliminate the clothing unbalanced state. When the corrected rinsing process is completed, the process proceeds to the dehydration process again.

After the rotational speed is increased to 700 rpm in step S9, it is determined whether or not 700 rpm has been reached in step S10. If 700 rpm has not been reached (N in step S10), it is predetermined without reaching. When the predetermined time has elapsed (Y in step S15), the process proceeds to step S17, the dehydration operation is stopped, and the process proceeds to the corrected rinsing process (step S18).

  If it has reached 700 rpm in step S10 (Y in step S10), it is determined in step S11 whether or not the rotational speed has decreased, and if it has decreased (Y in step S11). In step S16, it is determined whether or not the reduced rotational speed is 100 rpm or more. If the rotational speed has decreased by 100 rpm or more (Y in step S16), the process proceeds to step S17 and the dehydration operation is stopped. Then, the process proceeds to the modified rinsing process (step S18). If the decreasing rotation speed is 100 rpm or less (N in Step S16), the process returns to Step S11.

  If the rotational speed has not decreased in step S11 (N in step S11), the continuous operation is performed at 700 rpm (step S12), and when the predetermined time of the dehydration process has elapsed (Y in step S13), the dehydration process is performed. finish.

  If the rotation speed of the washing / dehydrating tub 1 has decreased by 100 rpm or more after the dehydrating state of 600 rpm or more as in the above operation, the clothing becomes unbalanced in the washing / dehydrating tub 1 and abnormal. It is determined that vibration has occurred, the dehydration operation is stopped, the correction rinsing process is performed, the clothes are unbalanced, and the dehydration process is performed again.

  If it is determined that the rotational speed is reduced between 600 rpm for intermittent dehydration after the start of dehydration, in intermittent dehydration, the motor 5 is repeatedly turned on and off, so in intermittent dehydration at a low rotational speed. There is a possibility that the abnormal vibration detection may erroneously operate due to a temporary decrease in the rotational speed. The determination accuracy can be further improved by determining the decrease in the rotational speed after shifting to the continuous dehydration.

  Further, depending on the unbalanced state of the clothes, the water receiving tub 3 may hit the housing 10, but since it is weak, the rotational speed does not reach the predetermined maximum rotational speed, In some cases, moisture removal may not be performed sufficiently. In such a case, if a predetermined time elapses without the rotational speed reaching the predetermined maximum rotational speed, the clothes are removed from the washing and dehydrating tub 1. It is determined that abnormal vibration has occurred due to the unbalanced state, and the dehydration operation is stopped, the correction rinsing process is performed, the clothes are unbalanced, and the dehydration process is performed again.

  In addition, you may change the rotation speed of each step | level of intermittent dehydration demonstrated in this Embodiment according to the capacity | capacitance of a washing machine, etc.

  As described above, in the present embodiment, the washing and dewatering tub 1 detected by the rotation speed detector 11 in the intermittent dewatering in which the energization of the motor 5 is turned on and off and the dewatering process in which the continuous dewatering is performed after the intermittent dewatering. When it was determined that the rotation speed of the garment had decreased by a predetermined value or more, the energization to the motor 5 was stopped, the dehydration process was stopped, and a modified rinsing process for correcting the unbalanced state of the clothes in the washing and dehydrating tub 1 was performed. Later, when the dehydration process is operated again, abnormal vibration and product movement occur even when imbalance occurs during dehydration when dehydrating clothing containing a lot of moisture, such as clothing containing a lot of fleece materials. Safety can be improved by stopping the operation before and performing a correct rinse.

  Further, by determining whether or not the number of rotations of the washing and dehydrating tub 1 has reached a predetermined number of rotations or more, it is determined whether or not the number of rotations has decreased by a predetermined value or more. Even if an imbalance occurs during dehydration, it is possible to improve the safety by reliably detecting the imbalance condition and stopping the operation and rinsing it before abnormal vibration or product movement occurs. it can.

  In addition, when a transition is made to continuous dehydration after intermittent dehydration, it is possible to determine whether or not the rotation speed of the washing and dehydrating tub 1 has decreased by a predetermined value or more, so that a large amount of clothing containing a lot of moisture, such as fleece material, can be obtained. Even if an imbalance occurs during the dehydration of the clothes it contains, the imbalance condition is reliably detected, and the operation is stopped and corrected before abnormal vibration or product movement occurs, improving safety. be able to.

  In addition, after the dehydration process has started, when the maximum number of rotations set by the washing and dehydration tank 1 has not reached even after a predetermined time has elapsed, the dehydration process is stopped, and after performing the correct rinsing process, the dehydration process is run again. With this configuration, even when clothes that contain a lot of moisture, such as clothes that contain a lot of fleece material, are unbalanced during the dehydration, the unbalanced state is detected reliably, and abnormal vibration and product movement occur. The safety can be improved by stopping the operation and performing a rinsing before the operation.

  As described above, the washing machine according to the present invention improves safety by stopping operation and performing a correct rinse before abnormal vibration or product movement occurs even if clothing imbalance occurs during dehydration. Therefore, it can also be applied to other washing machine uses such as a drum type.

DESCRIPTION OF SYMBOLS 1 Washing and dewatering tank 2 Pulsator 3 Water receiving tank 5 Motor 7 Drive mechanism part 11 Rotation number detector 12 Rotation number detection control part 13 Control means 18 Water supply valve

Claims (4)

A washing / dehydrating tub for storing clothes, a water receiving tub for enclosing the washing / dehydrating tub rotatably, a motor for rotationally driving the washing / dehydrating tub via a drive mechanism, and water supply to the water receiving tub A water supply valve, a rotation speed detector that detects the rotation speed of the drive mechanism section and outputs it to the rotation speed detection control section, and inputs a signal from the rotation speed detection control section, etc. Control means for controlling each step of control, washing, rinsing and dehydration, the control means in the dehydration process for performing intermittent dehydration for turning on and off the energization of the motor and continuous dehydration after intermittent dehydration When it is determined that the rotation speed of the washing / dehydrating tub detected by the rotation speed detector has decreased by a predetermined value or more, energization to the motor is stopped to stop the dehydration process, Modification to correct clothing imbalance After performing the cedar stroke, washing machine to operate again dehydration step. 2. The washing machine according to claim 1, wherein the control unit determines whether or not the number of rotations of the washing and dewatering tub has decreased by a predetermined value or more after reaching the predetermined number of rotations or more. 2. The washing machine according to claim 1, wherein the control means determines whether or not the number of rotations of the washing and dewatering tub has decreased by a predetermined value or more when transitioning to continuous dehydration after intermittent dehydration. The control means stops the dewatering process and performs the correct rinsing process when the washing and dewatering tank has not reached the maximum rotation speed set even after a predetermined time has elapsed after the start of the dewatering process, and then operates the dewatering process again. The washing machine according to any one of claims 1 to 3.

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