JP6472610B2 - Washing machine - Google Patents

Description

  The present embodiment relates to a washing machine.

  In the washing machine, there is a so-called vertical washing machine having a rotating tub whose axial direction is directed vertically in the water tub and a stirring body at the inner bottom of the rotating tub. In this type of washing machine, washing operation is performed by accumulating water in a water tank, that is, in a rotating tank, and rotating the agitator forward and backward in a state where detergent is put. In the rinsing operation, the stirrer is rotated forward and backward with water stored in the rotating tank. Recently, from the viewpoint of saving water, the amount of water used in these washing operations and rinsing operations has been generally reduced, and the number of revolutions of the stirrer is set slightly higher so that washing operations and rinsing operations are performed. There is something.

  However, in this type of washing machine, depending on the washing condition and the setting condition of the washing machine, the vibration of the water tub and the outer box of the washing machine is increased, and there is a risk that the electric wiring in the washing machine is stressed. As a countermeasure, a vibration detecting means for detecting the vibration of the water tank is provided, and an abnormal vibration determining means for determining that the vibration is abnormally large when the vibration detection value by the vibration detecting means exceeds a preset threshold value is provided. There is a washing machine. If it is determined that the vibration is large, vibration reduction control is performed.

JP 2012-223439 A

  By the way, there are various patterns as the above-mentioned abnormal vibration occurrence pattern. For example, a large abnormal vibration occurs instantaneously, or a relatively small abnormal vibration occurs many times. Moreover, they may occur alternately. In addition, relatively small abnormal vibrations may converge thereafter.

  In the above-described washing machine, abnormal vibration is determined by one threshold value. Therefore, if the threshold value is set to be large so as to determine large abnormal vibration, a relatively small abnormal vibration cannot be determined as abnormal vibration. In addition, if the threshold is set to be small to determine relatively small abnormal vibration, it is frequently determined that abnormal vibration has occurred, and relatively small vibration that may converge is also determined to be abnormal vibration. Resulting in. In general, there is a problem that the reliability of the abnormal vibration determination accuracy is low.

  Therefore, a washing machine is provided that can improve the accuracy of abnormal vibration determination during a washing operation or a rinsing operation.

The washing machine of the embodiment includes a water tub, a rotating tub that is rotatably provided around the vertical axis inside the water tub, and in which laundry is accommodated, and an agitator that is rotatably provided at the inner bottom of the rotating tub. A body, a circulation pipe provided outside the water tank for circulating water in the water tank by a circulation pump, vibration detecting means for detecting vibration of the water tank, and rotating the agitator forward and backward to wash. Washing operation control means for controlling the circulation pump so as to circulate water through the circulation pipe during the washing operation or the rinsing operation, and a determination on the vibration detection result by the vibration detection means Abnormal vibration occurs when the vibration detection result by the vibration detecting means matches any one of the determination criteria during the washing operation or the rinsing operation. And abnormal vibration determining means for determining a vibration reduction control means for performing vibration reduction control when the abnormal vibration generated is determined by the abnormal vibration judging means, and the laundry weight detecting means for detecting the weight of laundry, the The plurality of determination criteria are set for a first determination threshold (A) set for the vibration detection result and the number of times the vibration detection result is equal to or greater than the determination threshold (A). Combination with the first determination reference number of times (M), the second determination threshold value (B) set for the vibration detection result, and the vibration detection result is equal to or greater than the determination threshold value (B). Each of the determination criteria is such that the first determination threshold (A) is higher than the second determination threshold (B). Large (A> B) and the first judgment reference times (M) is smaller than the second determination reference number (N) (M <N), and the first determination threshold (A) and the second determination threshold (B) are Depending on the laundry weight detected by the laundry amount detection means, there is a relationship in which the first determination threshold (A) and the second determination threshold (B) become larger as the laundry weight is lighter, The abnormal vibration determination means, when the vibration detection result by the vibration detection means is equal to or greater than the first determination threshold (A) and the number of times equal to or greater than the first determination reference number (M), or It is determined that abnormal vibration has occurred when the number of times equal to or greater than the second determination threshold (B) is equal to or greater than the second determination reference number (N) .

Longitudinal side view of the washing machine according to the first embodiment Perspective view of washing machine with lid open Top view of the operation panel Electrical configuration block diagram Diagram showing the relationship between threshold, number of judgment criteria, and weight Changes in the number of rotations of the motor are shown, (a) shows normal control, and (b) shows vibration reduction control. Flow chart showing control details of washing process Flow chart showing control details of rinsing process The figure which shows the change of the rotation speed of the motor at the time of the vibration reduction control by 2nd Embodiment. The figure which shows the change of the rotation speed of the motor at the time of the vibration reduction control by 3rd Embodiment. The flowchart which shows the control content of the washing process by 4th Embodiment Changes in the number of revolutions of the motor are shown. (A) shows the vibration reduction control (large), (b) shows the vibration reduction control (medium). The change of the rotation speed of the motor by 5th Embodiment is shown, (a) shows the time of vibration reduction control (large), (b) shows the time of vibration reduction control (medium). The change of the rotation speed of the motor by 6th Embodiment is shown, (a) shows the time of vibration reduction control (large), (b) shows the time of vibration reduction control (medium). Block diagram of electrical configuration according to seventh embodiment (A)-(d) is a figure which shows the relationship between a threshold value, the frequency | count of determination criteria, and a weight for every temperature, respectively. The figure which shows the relationship of a threshold value, the frequency | count of determination criteria, and a weight for every driving course by 8th Embodiment. The figure which shows the relationship between a threshold value, the frequency | count of judgment criteria, and a weight for every driving course at the time of the normal time and reservation setting by 9th Embodiment. The block diagram which shows the electric constitution by 10th Embodiment Flow chart of processing at the end of operation Top view of the operation panel The flowchart which shows the control content of the washing process by 11th Embodiment

Hereinafter, the washing machine according to the first embodiment will be described with reference to FIGS. 1 to 8. The washing machine 1 according to the first embodiment has a vertical axis, for example, a washing machine having a drying function. This drying function may be omitted. In FIG. 1, the outer box 2 has a rectangular box shape, and an outer shell of the washing / drying machine is formed by the outer box 2 and a top cover 3 mounted on the upper part of the outer box 2. Legs 4 are provided on the lower surface of the outer box 2. Inside the outer box 2, a water tank 5 and a rotating tank 6 disposed in the water tank 5 are provided.
Both the water tank 5 and the rotating tank 6 have a bottomed cylindrical shape, and are arranged in a vertical axis shape in which each axis center line is directed in the vertical direction. The water tank 5 is elastically suspended by the outer case 2 via the elastic suspension mechanism 7 which mainly has the suspension rod 7a. The water tank 5 has a configuration capable of storing water.

The rotary tank 6 has a large number of holes 8 in the peripheral wall. At the bottom of the rotating tub 6, a water passage 9 that communicates with the water tub 5 is formed.
A rotating balancer 10 is provided at the peripheral edge of the upper end opening of the rotating tub 6. A laundry (not shown) is accommodated in the rotating tub 6. The rotating tub 6 functions as a washing tub during washing, as a dehydrating tub during dehydration, and as a drying tub during drying. The rotating tub 6 is rotatable about a vertical rotation center axis as a rotation center.

  A stirring body 11 is rotatably disposed at the bottom of the rotary tank 6. A drain port 5a is formed at the bottom of the water tank 5, and a drain valve 12 and a drain pipe 12a are connected to the drain port 5a. Further, the water tank 5 is formed with an air trap 5b for detecting the water level so as to communicate with the drain port 5a.

  A motor 13 is disposed on the outer bottom of the water tank 5. The motor 13 is an outer rotor type, and a clutch 14 is disposed inside the motor 13. When the clutch 14 integrally rotates the stirring shaft 11a connected to the stirring body 11 and the rotating shaft 6a connected to the rotating tub 6 (rotating tub / stirring body connection mode), the rotating shaft 6a is fixed. Thus, the configuration is such that only the stirring shaft 11a is rotated (stirring body mode).

  The drain valve 12 and the clutch 14 are connected to each other by a connecting tool 16. The drain valve 12 and the clutch 14 are operated by a clutch motor 15 shown in FIG. That is, when the clutch motor 15 is operated in a predetermined manner, the drain valve 12 is opened via the connector 16 and the clutch 14 is set to the rotary tank / stirring body connection mode. Further, from this state, the clutch motor 15 is operated in a predetermined manner, whereby the drain valve 12 is closed via the connector 16 and the clutch 14 is set to the stirring body mode.

An annular tank cover 18 is provided on the upper surface of the water tank 5, and a folded inner lid 19 is provided on the tank cover 18 so as to be openable and closable.
The top cover 3 is provided with a laundry entrance / exit 20 (see FIG. 2) that is positioned above the inner lid 19 and allows the laundry to be taken in and out of the rotary tub 6. A bi-fold lid 21 that opens and closes 20 is provided.

  A hot air supply device 22 (drying means) for drying is disposed at the rear portion of the top cover 3. This hot air supply device 22 sucks air outside the apparatus and discharges it from the discharge part 22a into the rotating tub 6 and a heater 24 (see FIG. 4) for heating the air discharged into the rotating tub 6. 4) and the like. The hot air generated by the fan 23 and the heater 24 is supplied from the discharge part 22 a mainly into the rotary tank 6, and then supplied between the rotary tank 6 and the water tank 5 through the hole 8. . And although the detailed warm air path is not shown in figure in the hot water in the water tank 5, it goes outside from the discharge duct (not shown) formed in the side wall of the water tank 5, and a part is returned in the rotary tank 6. The rest is discharged outside the machine.

Further, a water supply valve 50 is provided at the rear portion of the top cover 3 so as to supply water into the rotary tank 6 (in the water tank 5).
An operation panel 25 shown in FIG. 3 is provided on the upper surface of the front portion of the top cover 3. On this operation panel 25, a power-on switch 26, a turn-off switch 27, a start switch 28 serving as both start and pause, and a washing course among the fully automatic courses are selected as operation input units operated by the user. A washing course selection switch 29 for selecting a washing / drying course, a washing course selection switch 30 for selecting a washing course, a drying course selection switch 31 for selecting a drying course, and a washing operation for setting an execution time of the washing operation, etc. A setting switch 32, a rinsing operation setting switch 33 for selecting the number of times of rinsing, a dehydration operation setting switch 34 for setting a dehydration time, a drying operation setting switch 35 for setting a drying time, etc., and a water level are set. Water level setting switch 36, bath water switch for setting whether or not to use bath water Ji 37, reserved switch 38 for setting a reservation operation, the door lock switch 39 for locking the lid 21, an annular operating dial 40 disposed around the start switch 28 is provided.

  In addition, the operation panel 25 is provided with a display unit 41 for displaying various selections, setting contents, operating conditions, and the like. The start switch 28 functions as an operation start switch when turned on in an operation stop state, and functions as a temporary stop switch when operated in an operation state.

  Further, in FIG. 1, an acceleration sensor 42 is provided on the outer surface of the water tank 5 as vibration detection means for detecting the vibration of the water tank 5. The acceleration sensor 42 outputs a signal corresponding to the magnitude of vibration (magnitude of acceleration). In this case, the magnitude of the vibration is divided into vibration levels 0 to 512, for example.

  The suction port of the circulation pump 43 is connected to the drainage channel between the drainage port 5 a and the drainage valve 12. A circulation pipe 44 is connected to the discharge port of the circulation pump 43. The circulation pipe 44 is guided upward through the side of the water tank 5, passes through the tank cover 18, and faces the rotating tank 6. The circulation pump 43 and the circulation pipe 44 constitute a circulation mechanism 45.

  In FIG. 4 showing the electrical configuration, the control device 46 is configured mainly with a microcomputer, and functions as a control means 46a for controlling the overall operation of the washing machine with a software configuration. The control unit 46a includes a washing operation control unit 46a1, an abnormal vibration determination unit 46a2, a vibration reduction control unit 46a3, and a laundry weight detection unit 46a4.

  The abnormal vibration determination unit 46a2 includes a plurality of first determination criteria and second determination criteria as determination criteria for the vibration detection result by the acceleration sensor 42. As shown in FIG. 5, each of the determination criteria is a determination threshold value set for the vibration detection result (the first determination threshold value A and the second determination criterion in the first determination criterion). A second determination threshold B) and a determination reference number set for the number of times that the vibration detection result is equal to or greater than the determination threshold (first determination reference number M for the first determination criterion, second In the case of the judgment standard, the combination with the second judgment standard number N).

In this case, the determination thresholds are different from each other in the determination thresholds A and B, and the number of determination references (the first determination reference number M for the first determination reference and the second determination reference for the second determination reference). The number of determination criteria N) is also different from each other. For example, the first determination threshold A, which is a determination threshold in the first determination criterion, is set to the vibration level “300” when the laundry weight is 3 kg or more and less than 4 kg, and is used as the determination criterion number of times in the first determination criterion. The first determination reference number M is set to “1”. Similarly, the second determination threshold B as the determination threshold in the second determination criterion is set to the vibration level “150” when the laundry weight is not less than 3 kg and less than 4 kg, and is used as the determination reference count in the second determination criterion. The second determination reference number N is set to “4”. That is, there is a relationship that the determination reference counts M and N increase as the determination thresholds A and B are smaller.
The first determination criterion and the second determination criterion differ depending on the laundry weight as shown in FIG. There may be three or more criteria.
The vibration reduction control means 46a3 and the laundry weight detection means 46a4 will be described later.

  Further, the control device 46 includes, as input devices, the switches 26 to 39, the operation dial 40, the acceleration sensor 42, a water level sensor 47 as water level detecting means for detecting the water level in the water tank 5, and the lid 21. A lid opening / closing sensor 48 for detecting opening / closing (opening and closing) of the motor 13, a rotation sensor 49 for detecting the rotation speed of the motor 13, and a current sensor 55 for detecting a current flowing through the motor 13 are connected.

  The control device 46 is an output side device based on each input signal from the input side device and a control program stored in advance, the display unit 41, the motor 13, the water supply valve 50, the drainage. The clutch motor 15 that operates the valve 12 and the clutch 14, the fan 23, the heater 24, the circulation pump 43, the bath water pump 52, and the buzzer 53 are controlled via drive circuits 54, respectively. The drive circuit 54 is a generic term for drive circuits of corresponding devices.

  The washing process and the rinsing process executed by the washing operation control means 46a1 of the control device 46 will be described. In the washing process, the weight of the laundry is detected in Step S10 (laundry weight detection means 46a).

  In this laundry weight detection, the rotation speed obtained by rotating the stirring body 11 by applying a constant power to the motor 13 while the laundry is stored in the rotary tub 6 and the laundry in the rotary tub 6 are detected. The laundry weight (weight) is detected from a comparison with the number of rotations obtained by rotating the stirring body 11 by applying a constant electric power to the motor 13 in a state where it is not accommodated. This detection data is used for water level setting and abnormal vibration determination. In this weight detection, it is detected whether the weight is less than 1 kg, 1 kg or more to less than 3 kg, 3 kg or more to less than 4 kg, 4 kg or more to less than 6 kg, or 6 kg or more.

The laundry weight may be detected based on the current flowing through the motor 13.
In step S20 to step S40, water supply is executed. With this water supply, the water supply valve 50 is opened with the drain valve 12 closed, and water is supplied into the rotary tank 6 (in the water tank 5) (step S20). Water supply is stopped (step S40). Thereafter, in step S50, it is determined whether or not the elapsed time from the start of the washing process has passed a preset washing time. If not, the vibration detection result (vibration detection value) by the acceleration sensor 42 is obtained. Whether or not any of the first determination criterion and the second determination criterion is met is executed.

  That is, the process proceeds to step S60, where it is determined whether or not the vibration detection result (vibration detection value) by the acceleration sensor 42 is equal to or greater than the first determination threshold A (see FIG. 5) of the first determination criterion. If so, it is detected in step S70 whether or not the vibration detection result is equal to or greater than the second determination threshold value B of the second determination criterion. The determination thresholds A and B and the determination reference number N are selected according to the weight detection result as shown in FIG. Note that the first determination reference number M may be changed to other than “1”.

  If "NO" in this step S70, the process proceeds to step S80 to execute the normal control washing operation (washing operation control means 46a1). In this washing operation, the stirrer 11 is rotated forward and backward in the mode shown in FIG. 6A (normal control). That is, the motor 13 that drives the stirrer 11 is raised to the rotational speed Ra in the forward direction in the time Ta, and the state of the rotational speed Ra is continuously cut off for the time Ka. Thereafter, with a pause time Da, the motor 13 is rotated in the reverse direction in the same pattern as described above, and then forward rotation and reverse rotation are repeated. Furthermore, at the time of this washing operation, the circulation pump 43 is driven so that the water in the rotating tub 6 is taken out of the water tub 5 and passed through the circulation pipe 44 and applied to the laundry in the rotating tub 6 from above the rotating tub 6. This increases the cleaning effect on the laundry. The water level in the rotating tank 6 is slightly lowered by the circulation of water through the circulation pipe 43.

  If “YES” in the step S60 and “YES” in the step S90, that is, the vibration detection result is equal to or higher than the first determination threshold A of the first determination criterion, and the number of times when the vibration detection result is equal to or higher than the first determination threshold. If it is 1 time which is the first determination reference number M of the first determination reference, the process proceeds to step S100 and it is determined that abnormal vibration has occurred (abnormal vibration determination means 46a2). Then, the process proceeds to step S110, and vibration reduction control (control change of the motor 13) is executed (vibration reduction control means 46a3). As shown in FIG. 6B, the vibration reduction control is a control for reducing the rotational speed of the motor 13 during forward and reverse rotation from the rotational speed Ra to Rb during normal washing operation. Thereby, the upper limit rotation speed of the stirring body 11 is lowered, and vibration is reduced.

  If “YES” in step S70 and “YES” in step S120, that is, the vibration detection result is equal to or greater than the second determination threshold value B of the second determination criterion, If it is 2 determination reference times N (see FIG. 5), the process proceeds to step S100, where it is determined that abnormal vibration has occurred, and vibration reduction control is executed in step S110.

After step S80 and step S110, the process returns to step S50.
Thereafter, when it is determined again in step S100 that abnormal vibration has occurred, vibration reduction control is executed again (repeatedly executed). That is, when abnormal vibration generation is determined by the abnormal vibration determination unit 46a2, the vibration reduction control unit 46a3 repeatedly executes vibration reduction control until the abnormal vibration determination unit 46a2 determines that no abnormal vibration has occurred.

If “NO” in step S70 or “NO” in step S120, that is, if it is determined that no abnormal vibration has occurred, the process returns to the normal control washing operation in step S80.
If “YES” in the step S50, the process proceeds to a step S130, the washing process (washing operation) is finished, and the process proceeds to the next rinsing process. The control contents of this rinsing process are shown in FIG. In FIG. 8, in step S140, drainage is executed. When the drainage valve 12 is opened and the water in the rotary tub 6 is discharged and the reset water level reaches a predetermined water level (determined in step S150), the process proceeds to step S160 and the dehydration operation is started. In this dehydration operation, the rotation of the rotary tank 6 is started according to a predetermined pattern as time advances. When the set dehydration time has elapsed (determined in step S170), the process proceeds to step S180 and the dehydration operation is stopped. At this time, the drain valve 12 is also closed.

  In the next step S190 to step S210, water is supplied to the preset water level in the rotary tub 6. In step S220, it is determined whether or not a preset rinse time has elapsed. If “NO”, the process proceeds to step S230. In this step S230, it is determined whether or not there has been a determination result of the occurrence of abnormal vibration in the washing operation. Perform vibration reduction control. If “NO” in step S230, steps S250 to S310, which are the same controls as steps S60 to S120 in FIG. 7, are executed. However, in step S270, the rinsing operation is executed instead of the washing operation, but the operation pattern (motor control pattern) is the same. That is, as in the case of the washing operation, whether or not abnormal vibration has occurred is determined, and if there is no abnormal vibration, the normal control rinse operation (motor 13 control similar to the washing operation) is executed and abnormal vibration has occurred. If there is, vibration reduction control is executed. Water is also circulated by the circulation pump 43 during the rinsing operation.

If “YES” in the step S220, the process proceeds to a step S320 to end the rinsing process (rinsing operation), and the process proceeds to the next process.
In the above embodiment, the abnormal vibration determination unit 46a2 based on the software configuration of the control device 46 has the first determination criterion and the second determination criterion as the determination criterion for the vibration detection result by the acceleration sensor 42 as the vibration detection unit, During the washing operation or the rinsing operation, it is determined that abnormal vibration has occurred when the vibration detection result matches one of the determination criteria.

  In the case of determining abnormal vibration using only one criterion (for example, only one threshold), if the criterion is set large to determine a large abnormal vibration pattern, a relatively large amount of abnormal vibration occurs. The pattern to be used cannot be determined as abnormal vibration. Further, if the threshold value is simply set small, the occurrence of abnormal vibration is frequently determined. Also, relatively small vibrations that may converge are determined to be abnormal vibrations.

  In this regard, according to the above-described embodiment, a plurality of determination criteria are set as the determination criteria, and it is determined that abnormal vibration has occurred when the vibration detection result matches one of the determination criteria. If any of these occurs, it can be determined that abnormal vibration has occurred, and the accuracy of abnormal vibration determination can be improved.

  In the present embodiment, the first determination criterion and the second determination criterion are set to the determination threshold values set for the vibration detection result (the first determination threshold value A and the second determination value in the first determination criterion). The second determination threshold B) and the number of determination references set for the number of times that the vibration detection result is equal to or greater than the determination threshold (the first determination criterion for the first determination criterion). In the case of the number of times M and the second criterion, the number of times of the second criterion is N). In addition, the determination threshold values of the respective determination criteria are set to different values, and the determination reference counts M and N are increased as the determination threshold values A and B are smaller. Then, the abnormal vibration determination unit 46a2 determines that the abnormal vibration has occurred when the vibration detection result is equal to or greater than the determination threshold value in at least one determination criterion and the number of times the vibration detection result is equal to or greater than the determination criterion number in the determination criterion. I made it.

According to this, it is possible to determine that abnormal vibration has occurred even in a pattern such as a large abnormal vibration with a low occurrence frequency or a pattern such as a small abnormal vibration with a relatively high occurrence frequency, and the abnormal vibration determination accuracy can be improved.
And since vibration reduction control is performed by the vibration reduction control means 46a3 when abnormal vibration generation | occurrence | production is determined by the abnormal vibration determination means 46a2, abnormal vibration can be eliminated. For this reason, it can reduce that stress is applied to the electrical wiring in the washing machine 1, the circulation pipe 44, and the like.

  In particular, in this embodiment, the first determination reference number M of the first determination threshold A that is a high threshold is set to 1, that is, the minimum number, and the second determination reference number N of the second determination threshold B that is a low threshold. Since the number of times is greater than 1, this can be determined immediately when a large abnormal vibration occurs, and only when the second determination threshold number B is the second determination reference number N, where convergence is not expected when a comparatively small abnormal vibration occurs. It can be determined that abnormal vibration has occurred.

  In particular, in this embodiment, the cleaning effect can be improved by circulating water with the circulation pump 43 during the washing operation and the rinsing operation. However, on the other hand, it is expected that the occurrence of vibrations increases as the water level in the rotating tub 6 decreases due to the operation of the circulation pump 43. In this respect, in this embodiment, since the abnormal vibration determination accuracy can be improved, the washing operation is not continued while the abnormal vibration is generated.

In the present embodiment, the laundry weight detection means 46a4 for detecting the weight of the laundry is provided, and the abnormal vibration determination means 46a2 sets the determination thresholds A and B and the determination reference number N as the laundry weight detection means. It was made to change according to the laundry weight detected by 46a4.
The magnitude and frequency of abnormal vibration correlate with the weight of the laundry. For example, when the laundry weight is light, even if the vibration detection result by the acceleration sensor 42 is large, the influence on the internal wiring and the circulation pipe 44 is small. When the amount of laundry is heavy, the vibration detection result by the acceleration sensor 42 is Even if it is relatively small, the influence on the internal wiring, the circulation pipe 44 and the like is large.

  According to the present embodiment in consideration of this point, as can be seen from FIG. 5, the first determination threshold A for large abnormal vibration determination, and the second determination threshold B for relatively small abnormal vibration determination. In all cases, the weight is increased as the laundry weight is lighter. Further, the second determination reference number N for the second determination threshold B is increased as the laundry weight is lighter. Thereby, the influence on internal wiring, the circulation pipe 44, etc. can be reduced.

  In the present embodiment, when the abnormal vibration determining means 46a2 determines the occurrence of abnormal vibration during the washing operation, the vibration reduction control by the vibration reduction control means 46a3 is executed from the beginning during the rinsing operation.

  If the abnormal vibration determination means 46a2 determines the occurrence of abnormal vibration during the washing operation, the probability of determining the occurrence of abnormal vibration is high even during the rinsing operation, which is substantially the same operation content as the washing operation. According to the above-described embodiment in consideration of this, when the abnormal vibration determination unit 46a2 determines that the abnormal vibration has occurred during the washing operation, the vibration reduction control by the vibration reduction control unit 46a3 is executed from the beginning during the rinse operation. Thus, abnormal vibrations in the rinsing operation can be prevented in advance.

  Further, in this embodiment, when abnormal vibration occurrence is determined by the abnormal vibration determination means 46a2, vibration reduction control is repeatedly executed until the abnormal vibration determination means 46a2 determines that no abnormal vibration has occurred. Can be reduced sequentially.

  In the present embodiment, since the circulation mechanism 45 is provided, the cleaning effect is improved during the operation of the circulation mechanism 45, but the water level in the rotating tub 6 is reduced and vibration is likely to occur. Therefore, in the present embodiment, as described above, whether or not abnormal vibration has occurred is determined, and vibration reduction control is performed according to the determination result. Therefore, vibration can be reduced even in a situation where such vibration is likely to occur. .

  Note that the case where the circulation mechanism 45 is operated and the case where the circulation mechanism 45 is not operated may be switched according to the operation course or by the user. Further, the case where the circulation mechanism 45 is operated and the case where the circulation mechanism 45 is not operated are determined. The thresholds A and B and the determination reference counts M and N set for each of the thresholds A and B may be changed. For example, the determination thresholds A and B when the circulation mechanism 45 is operated, and the determination reference counts M and N for each threshold, the determination thresholds A and B when the circulation mechanism 45 is not operated, and the thresholds. It may be set lower (smaller) than the determination reference times M and N.

  FIG. 9 shows a second embodiment. In the second embodiment, the contents of control by the vibration reduction control means 46a3 are different from the first embodiment. In the vibration reduction control in the second embodiment, the rotation rise time of the motor 13 is set as the time Tb. This time Tb is set longer than the rotation rise time Ta up to the rotation speed Ra of the motor 13 in the normal control shown in FIG. As a result, the motor 13 and hence the stirring body 11 can be gently started up, and vibration is reduced.

  FIG. 10 shows a third embodiment. In the vibration reduction control in the third embodiment, the rest time of the motor 13 is set as the time Db. This time Db is set longer than the pause time Da of the motor 13 in the normal control shown in FIG. As a result, the non-driving time of the motor 13 and hence the stirrer 11 is lengthened and vibration is reduced.

  11 and 12 show a fourth embodiment. In the fourth embodiment, with respect to the flowchart of FIG. 7 of the first embodiment, the step following “YES” in step S90 is changed to step S140 and step S150, and the step following “YES” in step S120 is changed. The point which added step S160 and step S170 differs from 1st Embodiment. That is, when the detection result of the acceleration sensor 42 is the first threshold value A for determination (vibration degree: large) and it is determined that abnormal vibration has occurred with the detection content of once (step S140), the acceleration sensor When the detection result of 42 is the second determination threshold B (degree of vibration: medium) smaller than the first determination threshold A, and it is determined that abnormal vibration has occurred with the detection content of the second determination reference number N (step S160). The control content of vibration reduction control (step S150, step S170) differs.

  If it is determined in step S140 that abnormal vibration has occurred (vibration detection result: large), the upper limit rotational speed of the motor 13 is set to Rb (vibration reduction control (large)) as shown in FIG. When it is determined that abnormal vibration has occurred (vibration detection result: middle), the upper limit rotational speed of the motor 13 is slightly higher than Rb (lower than the upper limit rotational speed Ra of normal control) as shown in FIG. Set to a number Rc (vibration reduction control (medium)).

According to the fourth embodiment, the vibration reduction control can be performed without excess or deficiency by changing the upper limit rotational speed of the motor 13 in the vibration reduction control according to the magnitude of the abnormal vibration.
FIG. 13 shows a fifth embodiment, which differs from the fourth embodiment in the following points. Vibration detection result: When it is determined that a large abnormal vibration has occurred, the rise time of the motor 13 is set to the time Tb as shown in FIG. When the determination is made, the rising time of the motor 13 is set to time Tc (Ta <Tc <Tb) as shown in FIG.
According to the fifth embodiment, the vibration reduction control can be performed without excess or deficiency by changing the rotation rise time of the motor 13 in the vibration reduction control according to the magnitude of the abnormal vibration.

  FIG. 14 shows a sixth embodiment, which differs from the fourth embodiment in the following points. Vibration detection result: When it is determined that a large abnormal vibration has occurred, the dwell time of the motor 13 is set to time Db as shown in FIG. When the determination is made, the rest time of the motor 13 is set to time Dc (Da <Dc <Db) as shown in FIG.

According to the sixth embodiment, the vibration reduction control can be performed without excess or deficiency by changing the pause time of the motor 13 in the vibration reduction control according to the magnitude of the abnormal vibration.
15 and 16 show a seventh embodiment. In the seventh embodiment, the washing machine 1 includes a temperature sensor 60 that detects the temperature of the installation environment thereof. This temperature sensor 60 is attached to the inner surface of the outer box, for example. Furthermore, the abnormal vibration determination unit 46a2 changes the first determination threshold A, the second determination threshold B, and the second determination reference number N as shown in FIG. 16 according to the temperature detected by the temperature sensor 60. I am doing so. In this case, when the detection temperature is less than 10 ° C., when the temperature is 10 ° C. or more and less than 20 ° C., when the detection temperature is 20 ° C. or more and less than 30 ° C., or when the temperature is 30 ° C. or more, The reference number N is changed.

For example, as the installation environment temperature of the washing machine increases, the vibration detection result by the acceleration sensor 42 tends to be larger than the actual vibration of the water tank 5. In this case, since the vibration of the water tank 5 is actually small, the influence on the internal wiring and the circulation pipe 44 is small.
In the seventh embodiment in consideration of this point, the first determination threshold A, the second determination threshold B, and the second determination reference number N are changed according to the temperature detected by the temperature sensor 60. Vibration reduction control that matches the actual vibration of the water tank 5 is possible. Note that the first determination reference number M may also be changed.

  FIG. 17 relates to the eighth embodiment, and differs from the first embodiment in the following points. In the eighth embodiment, the operation course executed by the control means 46a is suitable for washing a plurality of operation courses, for example, laundry of standard cloth quality (mixed cotton and synthetic fiber) with a standard weight. A standard course, a saving course for saving water and power, a putting-on course for washing after washing, a blanket course suitable for washing blankets, and a dry course suitable for dry washing are provided. Then, the abnormal vibration determination means 46a2 changes the first determination threshold A, the second determination threshold B, and the second determination reference number N according to the driving course as shown in FIG.

In the eighth embodiment, vibration reduction control according to the driving course is possible. Note that the first determination reference number M may also be changed.
FIG. 18 relates to the ninth embodiment, and differs from the eighth embodiment in the following points. In the ninth embodiment, as the driving course, a normal driving course (this is the above standard course, saving course, extra course, blanket course, dry course) and a driving course at the time of reservation setting (this is the above standard course) , A saving course, a special course, a blanket course, and a course set for a dry course). Then, the abnormal vibration determination means 46a2 changes the first determination threshold A, the second determination threshold B, and the second determination reference number N according to the driving course as shown in FIG. That is, the first determination threshold A, the second determination threshold B, and the second determination reference number N of the normal driving course are set low (small) in the driving course at the time of reservation setting.

  When the driving course at the time of reservation setting is executed, the execution time zone is often a quiet time zone such as midnight or dawn. In this case, there are many users who feel noisy when abnormal vibration occurs. In the ninth embodiment in consideration of this, in the case of the driving course at the time of reservation setting with respect to the first determination threshold A, the second determination threshold B, and the second determination reference number N of the normal driving course Since the first determination threshold A, the second determination threshold B, and the second determination reference frequency N are set to be low (small), the vibration occurs while the abnormal vibration is small when the driving course is executed at the time of reservation setting. Reduction control can be executed, and noise generation can be reduced. Note that the first determination reference number M may also be changed.

  19 to 21 show the tenth embodiment, and the following points are different from the first embodiment. As shown in FIG. 19, the control device 46 includes a non-volatile memory 61 that stores the number of times the vibration reduction control means 46a3 has executed the vibration reduction control as a storage means. The display unit 41 and the buzzer 53 correspond to notification means. The control means 46a performs the control shown in FIG. 20 at the end of the washing operation. First, in step T10, the number of times that the vibration reduction control means 46a3 has executed the vibration reduction control is read from the nonvolatile memory 61. In the first stage, the number of executions is zero. Next, in step T20, it is determined whether or not the vibration reduction control means 46a3 has executed vibration reduction control in the current washing operation. If it has been executed, the process proceeds to step T30 and the number of executions is counted by one (count). Up). In the next step S40, the count value is stored in the nonvolatile memory 61. Then, the process proceeds to step T50, where it is determined whether or not the count value (number of executions) is equal to or greater than a predetermined number. In this way, the word “inspection” blinks or lights up. In this case, the buzzer 53 may be sounded.

  The purpose of the “inspection” display is that the vibration reduction control is frequently executed (the same is true that the occurrence of abnormal vibration is frequently determined), and there is a problem in the installation state of the washing machine 1, It is possible to increase the vibration due to the deterioration of parts. It should be noted that instead of the number of executions of vibration reduction control, the number of abnormal vibration occurrence determinations may be counted, and notification may be made when the number of counts exceeds a predetermined number.

  FIG. 22 shows an eleventh embodiment. The eleventh embodiment differs from the first embodiment in that steps S51 to S56 are provided in the flowchart of FIG. 7 of the first embodiment. That is, step S51 is provided as a step following “NO” in step S50. In this step S51, it is determined whether or not the water level in the rotating tub 6 (the water level detected by the water level sensor 47) is less than a predetermined water level. This predetermined water level is set to a relatively low water level. If it is determined in step S51 that the water level in the rotating tub 6 is lower than the predetermined water level, the process proceeds to step S52, and the vibration detection result by the acceleration sensor 42 is the first determination threshold A (determination). It is determined whether or not it is greater than or equal to the second determination threshold B. If the vibration detection result is equal to or greater than the first determination threshold value A of the first determination criterion and the number of times of the vibration detection result is equal to or more than the first determination criterion number M of the first determination criterion (step S53). "YES"), the process proceeds to step S55, where it is determined that abnormal vibration has occurred (abnormal vibration determination means 46a2). Then, vibration reduction control is executed (step S56). If “NO” in the step S52 or the step S53, the process proceeds to a step S54 to perform a normal control washing operation.

  If “NO” in the step S51 (when the water level is equal to or higher than the predetermined water level), the above-described steps S60 to S110 are executed. That is, as in the first embodiment, it is determined whether the vibration detection result matches either the first determination criterion or the second determination criterion, and vibration reduction control or normal control is executed according to the determination result. To do.

  In the eleventh embodiment, when the abnormal vibration determination means 46a2 has a water level in the rotating tub 6 that is lower than a predetermined water level, the first determination criterion that is a criterion having a large threshold for determination among a plurality of criterion is used. In use, when the water level is equal to or higher than the predetermined water level, occurrence of abnormal vibration is determined using a plurality of determination criteria, the first determination criterion and the second determination criterion.

  When the water level in the rotating tub 6 is small, the laundry moves well by the stirring operation of the stirring body 11, and thus the water tub 5 also moves well. In other words, large abnormal vibration is likely to occur as abnormal vibration. Therefore, in the eleventh embodiment, by monitoring abnormal vibration using only the first determination criterion having the determination threshold A having a large determination threshold at low water levels, it is not necessary to monitor small abnormal vibration. . In addition, when the water level is equal to or higher than the predetermined water level, occurrence of abnormal vibration is determined using a plurality of determination criteria, the first determination criterion and the second determination criterion, and thus large abnormal vibrations frequently occur without converging. Even small abnormal vibrations can be judged well.

  As mentioned above, although several embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a washing machine, 5 is a water tub, 6 is a rotating tub, 11 is an agitator, 13 is a motor, 41 is a display unit (notification means), 53 is a buzzer (notification means), and 42 is an acceleration sensor (vibration detection). Means), 45 is a circulation mechanism, 46 is a control device, 46a is control means, 46a1 is washing operation control means, 46a2 is abnormal vibration determination means, 46a3 is vibration reduction control means, 46a4 is laundry weight detection means, and 60 is temperature. A sensor 61 is a non-volatile memory (storage means).

Claims (7)

A tank,
A rotating tub that is rotatably provided around the vertical axis inside the water tub and in which laundry is stored;
A stirrer rotatably provided at the inner bottom of the rotating tank;
A circulation pipe provided outside the water tank, for circulating the water in the water tank by a circulation pump;
Vibration detecting means for detecting vibration of the water tank;
Washing operation control means for controlling the circulation pump so as to circulate water through the circulation pipe during the washing operation or the rinsing operation while performing the washing operation or the rinsing operation by rotating the stirring body forward and backward,
There are a plurality of determination criteria as determination criteria for the vibration detection result by the vibration detection means, and abnormal when the vibration detection result by the vibration detection means matches any of the determination criteria during the washing operation or the rinsing operation Abnormal vibration determining means for determining occurrence of vibration;
Vibration reduction control means for executing vibration reduction control when abnormal vibration occurrence is determined by the abnormal vibration determination means;
Laundry weight detecting means for detecting the weight of the laundry;
Equipped with a,
The plurality of determination criteria are set for the first determination threshold (A) set for the vibration detection result and the number of times the vibration detection result is equal to or greater than the determination threshold (A). The combination with the first determination reference number (M), the second determination threshold (B) set for the vibration detection result, and the vibration detection result are equal to or greater than the determination threshold (B). Including a combination with the second determination reference number (N) set for the number of times,
In each of the determination criteria, the first determination threshold (A) is larger than the second determination threshold (B) (A> B), and the first determination reference count (M) is the second determination criterion. The laundry has a relationship smaller than the number of times (N) (M <N), and the first determination threshold (A) and the second determination threshold (B) are detected by the laundry amount detection means. Depending on the weight, there is a relationship in which the first determination threshold (A) and the second determination threshold (B) become larger as the laundry weight is lighter,
The abnormal vibration determination means, when the vibration detection result by the vibration detection means is equal to or greater than the first determination threshold (A) and the number of times equal to or greater than the first determination reference number (M), or A washing machine that determines that abnormal vibration has occurred when the number of times equal to or greater than the second determination threshold (B) is equal to or greater than the second determination reference number (N) . It has a temperature sensor that detects the temperature of the washing machine installation environment,
Said abnormal vibration determining means, said plurality of criteria, the washing machine according to claim 1 wherein the change in response to the detected temperature by the temperature sensor. With multiple driving courses
The washing machine according to claim 1 or 2, wherein the abnormal vibration determination means changes the plurality of determination criteria according to the driving course. When the water level in the rotating tub is less than a predetermined water level, the abnormal vibration determination means includes the first determination threshold value (A) having a large determination threshold value and the first determination reference number of times among the plurality of determination criteria. using the criteria that combine and (M), when the water level is the predetermined level or more, the washing machine according to claim 1, wherein determining the abnormal vibration generated by using a plurality of criteria. The vibration reduction control means, wherein when it is determined that abnormal vibration determining means by the abnormal vibration occurs, the abnormal vibration determining means according to claim 1 from 4 repeatedly executing vibration reduction control until the determination of the abnormal vibration occurrence without A washing machine according to any one of the preceding claims. A storage unit and a notification unit;
The vibration reduction control means stores the number of times of executing the vibration reduction control in the storage unit, any number of times the execution of claims 1 to the notification to the notification means when a predetermined number of times or more in 5 one The washing machine according to item. A tank,
A rotating tub that is rotatably provided around the vertical axis inside the water tub and in which laundry is stored;
A stirrer rotatably provided at the inner bottom of the rotating tank;
Vibration detecting means for detecting vibration of the water tank;
Washing operation control means for rotating the stirring body forward and backward to execute a washing operation or a rinsing operation;
There are a plurality of determination criteria as determination criteria for the vibration detection result by the vibration detection means, and abnormal when the vibration detection result by the vibration detection means matches any of the determination criteria during the washing operation or the rinsing operation Abnormal vibration determining means for determining occurrence of vibration;
Vibration reduction control means for executing vibration reduction control when abnormal vibration occurrence is determined by the abnormal vibration determination means,
A washing machine that executes vibration reduction control by the vibration reduction control unit from the beginning during a rinsing operation when the abnormal vibration determination unit determines occurrence of abnormal vibration during the washing operation.

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