JP2022065233A - Washing machine - Google Patents

Abstract

To provide a washing machine which detects deviation of laundry at an early stage, in a rotational speed rise period in the initial period of a dewatering step.SOLUTION: A washing machine includes: a body; a water tub supported inside the body; a washing and dewatering tub rotatably included inside the water tub; a motor for rotationally driving the washing and dewatering tub; a water supply valve for supplying water to the water tub; a drain valve for draining the water in the water tub; rotational speed detection means for detecting the rotational speed of the washing and dewatering tub; and control means for controlling the motor, the water supply valve, the drain valve and the like and for controlling each of washing, rinsing and dewatering steps. The control means measures the rotational speed of the washing and dewatering tub periodically, in the rotational speed rise period in the initial period of the dewatering step, and, by comparing a difference of the measured rotational speed between continuous two points with a difference of the measured rotational speed between the next continuous two points, detects presence/absence of the generation of laundry deviation in the washing and dewatering tub.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a washing machine that reduces vibration and noise during dehydration.

Patent Document 1 discloses a washing machine that reduces vibration and noise during dehydration. This washing machine is rotatably arranged at the bottom of the main body, a water tank oscillatingly arranged in the main body, a washing / dehydrating tub rotatably arranged in the water tub, and a washing / dehydrating tub. It is provided with a pulsator, a motor for driving the washing / dehydrating tub and / or the pulsator, an abnormal vibration detecting means for detecting abnormal vibration of the water tank, and a control means for controlling the motor and the like.

Japanese Unexamined Patent Publication No. 5-7692

The present disclosure provides a washing machine that detects the bias of the laundry at the beginning of the dehydration process.

The washing machine in the present disclosure includes a main body, a water tank supported in the main body, a washing / dehydrating tank rotatably contained in the water tank, a motor for rotationally driving the washing / dehydrating tank, and water supply to the water tank. Each process of washing, rinsing, and dehydrating by controlling the valve, the drain valve that discharges the water in the water tank, the rotation speed detecting means that detects the rotation speed of the washing / dehydrating tank, the motor, the water supply valve, the drain valve, etc. The control means periodically measures the rotation speed of the washing / dehydrating tub during the initial rotation speed increase period of the dehydration process, and the difference between the measured rotation speeds between two consecutive points. Is compared with the difference in the measured rotation speed between the next two consecutive points, and the presence or absence of bias of the washing machine in the washing / dehydrating tub is detected.

The washing machine in the present disclosure can detect the bias of the laundry at an early stage in the initial rotation speed increase period of the dehydration process. Therefore, it is possible to prevent the occurrence of abnormal vibration in the dehydration process.

Longitudinal sectional view of the washing machine according to the first embodiment The block diagram which shows the structure of the control system of the washing machine in Embodiment 1. Diagram of the relationship between the time and rotation speed of the washing and dehydrating tub at the start of dehydration of the washing machine in the first embodiment. The figure which shows the movement of the laundry in the washing and dehydration tub at the time of starting dehydration of the washing machine in Embodiment 1.

(Knowledge, etc. that became the basis of this disclosure)
At the time when the inventors came up with the present disclosure, the rate of increase in the rotation speed of the washing / dehydrating tub varies depending on environmental factors such as motor output and power supply voltage, and the amount of clothes to be put into the washing / dehydrating tub It fluctuates greatly depending on the difference in conditions for each use such as type and type.

Therefore, in order to prevent false detection that the case of normal rotation is a dangerous state, it is necessary to use the case where the rotation rise is the slowest among the normal rotation as a reference, so the judgment time is set. I had to take it for a long time.

In this case, the laundry in the dehydration tub is biased at an early stage after the start of dehydration, and even if the dehydration operation is performed in a dangerous state, it cannot be detected until a predetermined time is reached.

Therefore, until the detection, the dehydration tank continued to shake greatly, and there was a risk of product movement / damage, generation of loud noise, and destruction of peripheral equipment. In order to prevent this, the inventors have discovered the problem that it is necessary to promptly detect the bias of the laundry when it occurs and stop the washing and dehydration tub, and in order to solve the problem, It has come to constitute the subject of this disclosure.
□ Therefore, the present disclosure provides a washing machine that detects the bias of the laundry at an early stage during the initial rotation speed increase period of the dehydration process.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted. This is to prevent the following explanation from becoming unnecessarily redundant and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4.

[1-1. Constitution]
[1-1-1. Washing machine configuration]
In the washing machine 100 shown in FIGS. 1 and 2, a water tank 103 is suspended in the main body 101 by a hanging rod 102, and a washing / dehydrating tank 104 is provided inside the water tank 103 so as to be able to perform dehydration rotation. .. A pulsator 105 is rotatably arranged at the bottom of the washing / dehydrating tub 104. The motor 106 is mounted on the outer bottom of the water tank 103 and rotationally drives the pulsator 105 and / or the washing / dehydrating tank 104 via the belt 119 and the switching / deceleration mechanism 107. The switching / deceleration mechanism 107 has a brake mechanism 108, and the brake mechanism 108 has a function of stopping the rotation of the washing / dehydrating tank 104. The switching / deceleration mechanism 107 further includes a rotation speed detecting means 109, and can detect the rotation speed of the washing / dehydrating tub 104 during the dehydration rotation.

The drainage means 110 is composed of a drain valve 110a and a drain hose 110b to drain the washing water and rinse water in the water tank 103 to the outside, and the water supply valve 111 supplies tap water to the water tank 103. be.

A large number of drain holes 104a are provided on the side surface of the washing / dehydrating tub 104, and when the motor 106 rotates the washing / dehydrating tub 104 in a state where the washing water in the water tub 103 has been drained, the washing / dehydrating tub 104 is washed. The object 121 receives centrifugal force and moves to the side surface of the washing / dehydrating tub 104, and the washing water contained in the laundry 121 passes through the drain hole 104a provided on the side surface of the washing / dehydrating tub 104 by the centrifugal force. It moves to the water tank 103. The size of the drain hole 104a is set so that the hook of the brassiere or the like is not caught.

At the top of the washing and dehydrating tub 104 is a fluid balancer 112 to reduce vibration during dehydration.
Is provided.

The upper part of the main body 101 is composed of an upper frame body 113, and the upper frame body 113 is formed with an input port 113a for charging the laundry 121 into the washing / dehydrating tub 104 from the outside. A lid 114 is provided so as to cover the 113a so as to be openable and closable. Further, in front of the main body 101, a control means 120 for controlling the drain valve 110a, the water supply valve 111, the motor 106, and the like, and sequentially controlling each process such as washing, rinsing, and dehydration is provided.

Inside the upper frame 113, an abnormal vibration detecting means 115 for detecting the vibration when the water tank 103 shakes abnormally greatly during dehydration is provided, and the abnormal vibration detecting means 115 is inside the main body 101. The vibration detection lever 115a is extended. When the water tank 103 vibrates significantly, the abnormal vibration detecting means 115 detects the abnormal vibration by coming into contact with the vibration detecting lever 115a.

The mode and various functions such as the driving course are selected by the user inputting to the input unit 116a from the operation display unit 116 provided on the upper front surface of the upper frame body 113, and the control means 120 is input by the user. Based on the input information, it is displayed on the display unit 116b of the operation display unit 116 to inform the user of the selection status.

The control means 120 has a microcomputer (not shown), and by controlling the timekeeping means 117, it is possible to measure the elapsed time from an arbitrary time point.

Further, a notification means 118 for notifying the reception sound at the time of operation by the user and notifying at the time of abnormality is provided.

[1-2. motion]
The operation of the washing machine 100 configured as described above will be described below.

[1-2-1. Washing operation]
In order to perform the washing operation, the user opens the lid 114, puts the laundry 121 such as clothes into the washing / dehydrating tub 104, turns on the power, and presses the start button (start button 116a) on the input unit 116a of the operation display unit 116. When (not shown) is operated, the pulsator 105 rotates forward and reverse by the motor 106 to detect the amount of laundry 121. The amount of detergent required is displayed on the display unit 116b of the operation display unit 116 according to the detected amount of 121. When the user puts in the indicated amount of detergent and closes the lid 114, a predetermined amount of washing water is supplied from the water supply valve 111 into the washing / dehydrating tank 104 and the water tank 103.

When a predetermined amount of washing water is supplied, the pulsator 105 rotates in the forward and reverse directions to perform a washing step of washing the laundry 121. When the washing step for a predetermined time is completed, the drain valve 110a is opened and the washing water in the water tank 103 is drained.

When the washing water is drained, the washing / dehydrating tub 104 is rotated at a predetermined rotation speed by the motor 106 to perform the first dehydration step, and the washing water contained in the washing 121 is separated from the washing 121. And drain.

When the first dehydration step is completed, a predetermined amount of rinse water is supplied to the water tank 103 again from the water supply valve 111, the pulsator 105 is rotated in the forward and reverse directions, and the first rinse step of rinsing the laundry 121 is performed. When the first rinsing step is completed, the rinse water in the water tub 103 is drained, the washing / dehydrating tub 104 is rotated at a predetermined rotation speed by the motor 106, the second dehydration step is performed, and the laundry 121 is included. Separate the rinsing water from the laundry 121. Further, a final rinse step is performed by supplying rinse water, and then a final dehydration step is performed in which the rinse water in the water tank 103 is drained and the washing / dehydrating tank 104 is rotated at a predetermined rotation speed.

When the final dehydration step is completed, the operation is completed.

[1-2-2. Dehydration operation]
The dehydration operation of the washing machine 100 will be described with reference to FIGS. 3 and 4.

It has a function of adjusting the increase speed of the rotation speed of the washing / dehydrating tub 104 by repeating the intermittent operation of turning the motor 106 ON and OFF a predetermined number of times in the rotation speed increase section at the start of dehydration in the dehydration step.

As shown in FIG. 3A, during the rotation speed increase period at the initial stage of dehydration, the ON time T1 and the OFF time T2 of the motor 106 are fixed and repeatedly operated in the same combination to increase the rotation speed.

The amount of increase in the rotational speed at the ON time T1 of the motor 106 and the amount of decrease at the OFF time T2 of the motor 106 show different values depending on the output variation of each product and the amount of the laundry 121 in the washing / dehydrating tub 104. ..

As an example, when the amount of laundry 121 in the washing / dehydrating tub 104 is smaller than when the amount is large, the amount of increase in the rotation speed of the washing / dehydrating tub 104 at one ON time T1 of the motor 106 is larger. On the contrary, in the OFF time T2 of the motor 106, if the amount of the laundry 121 is small, the amount of decrease in the rotation speed is large.

In actual operation, the output characteristics of the product do not change during the dehydration process, and the amount of laundry 121 does not change. Therefore, the output of the motor 106 for each product and the laundry in the washing / dehydrating tub 104 The same tendency is shown in the continuous dehydration step regardless of the variation in the amount of 121 and the like.

As shown in FIG. 3B, the rotation speed of the control means 120 is set as R1 immediately after the ON time T1 of one motor 106 is completed while the ON time T1 and the OFF time T2 of the motor 106 are repeatedly operated. Store on the microcomputer.

The rotation speed immediately after the ON time T1 of the next motor 106 after the OFF time T2 of the motor 106 is completed is stored in the microcomputer of the control means 120 as R2, and this is repeated to measure and store R3 and R4. ..

If there is no change in the bias of the laundry 121 in the washing / dehydrating tub 104 between the time of R1 measurement and the time of R3 measurement, the amount of increase in the rotation speed in the section from R1 to R2 and the rotation from R2 to R3. Since the amount of increase in speed is about the same, the rate of change comparing these two sections is given by Equation 1.

When the measurement results in the dehydration operation under the condition that the rotation speed tends to increase are similarly set to X1 to X3, the formula 2 is obtained with respect to the above R1 to R3.

Similar to Equation 1, the rate of change comparing the two sections is Equation 3.

The same applies when the rotation speed is difficult to increase.

When the dehydration step is started in the state of FIG. 4A, the bias of the laundry 121 is expanded as in the state of FIG. 4B during the rotation speed increase period at the initial stage of dehydration, and the washing / dehydrating tub 104 is used. As the amplitude of the above increases, the torque required to increase the rotation speed increases, and the amount of increase in the rotation speed decreases.

If the laundry 121 is biased between the time of R3 measurement and the time of R4 measurement in FIG. 3 (b) as shown in FIG. 4 (b), the amount of increase in the rotation speed in this section becomes small. Therefore, the rate of change is given by Equation 4.

The above-mentioned rate of change of less than 0.9 is an example, and if the increase in the rotation speed between R3 and R4 becomes small, the value becomes smaller.

That is, when the rate of change is smaller than the set threshold value, it can be determined that the vibration of the washing / dehydrating tub 104 is large.

As a result, the expansion of the vibration of the washing / dehydrating tub 104 is determined for each total time of the ON time T1 and the OFF time T2 of the motor 106 once, and when the vibration expansion occurs, this is promptly detected and the motor 106 is sent to the motor 106. The power supply can be stopped and safely stopped by the brake mechanism 108.

[1-3. Effect, etc.]
As described above, in the present embodiment, the washing machine 100 includes a main body 101, a water tank 103 supported in the main body 101, a washing / dehydrating tank 104 rotatably contained in the water tank 103, and a washing / dehydrating tank 104. A motor 106 that rotationally drives the dehydration tank 104, a water supply valve 111 that supplies water to the water tank 103, a drain valve 110a that discharges water in the water tank 103, and a rotation speed detecting means 109 that detects the rotation speed of the washing / dehydration tank 104. And a control means 120 that controls each process of washing, rinsing, and dehydration by controlling the motor 106, the water supply valve 111, the drain valve 110a, and the like. During the initial rotation speed increase period of the dehydration process, the rotation speed of the washing and dehydrating tub 104 was periodically measured.
By comparing the difference in the measured rotation speed between two consecutive points with the difference in the measured rotation speed between the next two consecutive points, it is possible to determine whether or not the laundry 121 is biased in the washing / dehydrating tub 104. To detect.

This makes it possible to detect the bias of the laundry at an early stage during the initial rotation speed increase period of the dehydration step. Therefore, it is possible to prevent the occurrence of abnormal vibration in the dehydration process.

As in the present embodiment, the washing machine 100 controls the motor 106 on-off during the initial rotation speed increase period of the dehydration process, and the washing machine 100 controls the motor 106 on and off at the time of turning on the motor 106 and at the next turn-on end. The on-end time at the on-time may be set to the two consecutive points.

As a result, in the initial rotation speed increase period of the dehydration process, the on-end time when the motor 106 is turned on and the on-end time when the motor 106 is turned on are set to two consecutive points, so that the bias of the laundry is detected at an early stage. be able to. Therefore, it is possible to prevent the occurrence of abnormal vibration in the dehydration process.

Since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent thereof.

The present disclosure is applicable to washing machines that detect the bias of laundry at the beginning of the dehydration process. Specifically, the present disclosure is applicable to vertical washing machines, drum-type washing machines, and the like.

100 Washing machine 101 Main body 102 Suspension rod 103 Water tank 104 Washing and dehydration tank 104a Drain hole 105 Pulsator 106 Motor 107 Switching and deceleration mechanism 108 Brake mechanism 109 Rotation speed detection means 110 Drainage means 110a Drainage valve 110b Drainage hose 111 Water supply valve 112 Fluid Balancer 113 Upper frame 113a Input port 114 Lid 115 Abnormal vibration detection means 115a Vibration detection lever 116 Operation display unit 116a Input unit 116b Display unit 117 Timing means 118 Notification means 119 Belt 120 Control means 121 Laundry

Claims (2)

A main body, a water tank supported in the main body, a washing / dehydrating tank rotatably contained in the water tank, a motor for rotationally driving the washing / dehydrating tank, and a water supply valve for supplying water to the water tank. The drain valve that discharges the water in the water tank, the rotation speed detecting means that detects the rotation speed of the washing / dehydrating tank, the motor, the water supply valve, the drain valve, and the like are controlled for washing, rinsing, and dehydration. A control means for controlling each process is provided, and the control means periodically measures the rotation speed of the washing / dehydrating tub during the initial rotation speed increase period of the dehydration step, and measures between two consecutive points. A washing machine that detects the presence or absence of bias in the washing machine in the washing / dehydrating tub by comparing the difference in rotation speed with the difference in measured rotation speed between the next two consecutive points. The control means controls the motor on-off during the initial rotation speed increase period of the dehydration process, and the two consecutive points of the on-end time when the motor is on and the on-end time when the motor is turned on next. The washing machine according to claim 1.

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