KR20150143285A

KR20150143285A - Washing machine

Info

Publication number: KR20150143285A
Application number: KR1020150045004A
Authority: KR
Inventors: 노리후미 오구라; 고지 히사노
Original assignee: 가부시끼가이샤 도시바; 도시바 라이프스타일 가부시키가이샤
Priority date: 2014-06-11
Filing date: 2015-03-31
Publication date: 2015-12-23
Also published as: JP6472610B2; KR101733860B1; CN105297332A; CN105297332B; JP2016000083A

Abstract

Thereby improving the accuracy of abnormal vibration determination during washing operation or rinsing operation.
An abnormal vibration determination means for determining that abnormal vibration has occurred when a vibration detection result obtained by the vibration detection means is equal to a certain determination reference at the time of a washing operation or a rinse operation; And vibration reduction control means for performing vibration reduction control.

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine.

In a washing machine, there is a so-called vertical type washing machine having a rotating tub in which an axial direction is directed in an up-and-down direction inside a water tub, and an agitator in an inner bottom portion of a rotating tub. In this type of washing machine, water is stored in a water tank, that is, in a rotary tub, and the agitator is rotated in the normal and reverse directions while the detergent is put in. Also, in the rinsing operation, the stirring body is rotated in the normal and reverse directions while water is stored in the rotary tub. Recently, from the viewpoint of water saving, the amount of water used in these washing operations or rinsing operations is generally reduced, and the number of revolutions of the agitator is set to be slightly higher, thereby performing washing operation and rinsing operation.

However, in this type of washing machine, depending on the laundry condition or the installation condition of the washing machine, the vibration of the water tank or the washing machine outer box becomes large, and there is a possibility that stress is applied to electric wiring in the washing machine. A vibration detecting means for detecting the vibration of the water tank is provided as a countermeasure thereto and a washing machine provided with an abnormal vibration determining means for determining that the vibration is ideally large when the vibration detection value by the vibration detecting means exceeds a preset threshold value . When it is determined that the vibration is large, the vibration reduction control is performed.

Japanese Laid-Open Patent Publication No. 2012-223439

There are various patterns as the abnormal vibration generation pattern described above. For example, a large abnormal vibration momentarily occurs or a relatively small abnormal vibration occurs several times. In some cases, they occur alternately. In addition, a relatively small abnormal vibration may be converged thereafter.

In the washing machine described above, since the abnormal vibration is determined by one threshold value, if the threshold value is set to be slightly larger in order to determine a large abnormal vibration, a relatively small abnormal vibration can not be determined as an abnormal vibration. Further, if the threshold value is set to be slightly small in order to judge a relatively small vibration, it is judged that there is an abnormal vibration frequently, and a relatively small vibration having a possibility of convergence is judged as an abnormal vibration. Thus, there is a problem that the reliability of the abnormal vibration determination accuracy is low.

It is therefore an object of the present invention to provide a washing machine which can improve the accuracy of abnormal vibration determination during washing operation or rinsing operation.

The washing machine of the embodiment includes a water tank, a rotating tank rotatably installed around the longitudinal axis of the water tank and containing laundry therein, an agitating body rotatably installed on the inner bottom of the rotating tank, A washing operation control means for executing a washing operation or a rinsing operation by rotating the stirring member in the forward and reverse directions, and a control means for controlling the washing operation control means to have a plurality of determination criteria as a determination reference for the vibration detection result by the vibration detection means An abnormal vibration determination unit that determines that abnormal vibration occurs when the vibration detection result by the vibration detection unit is in agreement with any of the determination criteria during the washing operation or the rinsing operation; And a vibration reduction control means for performing vibration reduction control when it is determined that the occurrence of the vibration has occurred.

This makes it possible to obtain a washing machine capable of improving the accuracy of abnormal vibration determination during washing operation or rinsing operation.

1 is a longitudinal side view of a washing machine according to a first embodiment.
2 is a perspective view of the washing machine with the cover opened.
3 is a plan view of the operation panel.
4 is a block diagram of the electrical configuration.
5 is a diagram showing the relationship between the threshold value, the number of judgment reference times, and the weight.
FIGS. 6A and 6B are diagrams showing changes in the number of revolutions of the motor. FIG. 6A is a view showing normal control, and FIG.
Fig. 7 is a flowchart showing control contents of the washing cycle.
Fig. 8 is a flowchart showing control contents of the rinsing cycle.
Fig. 9 is a diagram showing a change in the number of revolutions of the motor in the vibration reduction control according to the second embodiment. Fig.
10 is a diagram showing a change in the number of revolutions of the motor at the time of vibration reduction control according to the third embodiment.
Fig. 11 is a flowchart showing control contents of the washing cycle according to the fourth embodiment.
Figs. 12A and 12B are diagrams showing changes in the number of revolutions of the motor. Fig. 12A is a diagram showing vibration reduction control (large), and Fig. 12B is a diagram showing vibration reduction control (middle).
Fig. 13 is a diagram showing changes in the number of revolutions of the motor according to the fifth embodiment. Fig. 13A is a diagram showing vibration reduction control (large), and Fig. 13B is a diagram showing vibration reduction control (middle).
Figs. 14A and 14B are diagrams showing changes in the number of revolutions of the motor according to the sixth embodiment. Figs. 14A and 14B show the vibration reduction control (large) and the vibration reduction control .
15 is a block diagram of an electrical configuration according to the seventh embodiment.
16A to 16D are diagrams showing the relationship of the threshold value, the number of judgment reference times, and the weight for each temperature.
17 is a diagram showing the relationship between the threshold value, the number of times of judgment reference, and the weight for each driving course according to the eighth embodiment.
18 is a graph showing the relationship between the threshold value, the number of times of judgment reference, and the weight for each of the driving courses at the time of normal setting and the setting of reservation according to the ninth embodiment.
19 is a block diagram showing an electrical configuration according to the tenth embodiment.
20 is a processing flowchart at the time of ending the operation.
21 is a plan view of the operation panel.
Fig. 22 is a flowchart showing control contents of the washing cycle according to the eleventh embodiment. Fig.

Hereinafter, a washing machine according to a first embodiment will be described with reference to Figs. 1 to 8. Fig. The washing machine 1 of the first embodiment is a vertical axis type, for example, a washing machine having a drying function. This drying function is not necessary. In Fig. 1, the outer box 2 is formed in a rectangular box shape, and the outer periphery of the washer / dryer is formed by the outer box 2 and the top cover 3 mounted on the upper portion of the outer box 2 have. A leg portion (4) is provided on the lower surface of the outer box (2). A water tub 5 and a rotary tub 6 provided in the water tub 5 are provided inside the outer box 2.

The water tank 5 and the rotary tub 6 are both formed in a cylindrical shape with a bottom, and each axis center line is arranged in a vertical axis direction oriented in the vertical direction. The water tub 5 is resiliently suspended in the outer box 2 through an elastic hanging mechanism 7 mainly composed of a hanging rod 7a. The water tank 5 is configured to be low in water.

The rotary tub (6) has a plurality of hole portions (8) in the peripheral wall portion. At the bottom of the rotary tub (6), there is formed a water passing portion (9) communicating with the water tub (5).

The rotary tub (6) is provided with a rotary balancer (10) at the peripheral edge portion of the upper opening. A laundry (not shown) is accommodated in the rotary tub 6. The rotary tub 6 serves as a washing tub for washing, a dehydrating tub for dehydrating, and a drying tub for drying. The rotatable tub 6 is rotatable about the rotation center axis of the longitudinal axis.

A stirrer 11 is rotatably provided on the bottom of the rotary tub 6. A drain hole 5a is formed in the bottom of the water tank 5 and a drain valve 12 and a drain pipe 12a are connected to the drain hole 5a. In addition, an air trap 5b for detecting the level of water is formed in the water tank 5 in communication with the drain port 5a.

A motor (13) is provided on the outer bottom of the water tub (5). The motor 13 is of an outer rotor type, and a clutch 14 is provided inside the motor 13. The clutch 14 is configured to rotate integrally with the stirring shaft 11a connected to the stirring member 11 and the rotating shaft 6a connected to the rotating tank 6 Is fixed and the case of rotating only the stirring shaft 11a (stirring body mode) can be switched.

The drain valve (12) and the clutch (14) are connected to each other by a connector (16). The drain valve 12 and the clutch 14 are operated by the 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 connecting port 16, and the clutch 14 is in the rotating / stirring body connecting mode. In this state, the clutch motor 15 is caused to perform a predetermined operation so that the drain valve 12 is closed and the clutch 14 is placed in the agitator mode via the connecting port 16.

An annular cover 18 is provided on the upper surface of the water tray 5. A two-stage foldable inner lid 19 is provided on the coarse cover 18 so as to be openable and closable.

The top cover 3 is provided with a laundry inlet 20 (see FIG. 2) for placing the laundry in the rotary tub 6 above and above the inner lid 19, Stage folding lid 21 for opening and closing the folding lid 21 is provided.

At the rear portion of the top cover 3, a hot air supply device 22 (drying means) for drying is provided. The hot air supply device 22 includes a fan 23 (see FIG. 4) for sucking air outside the washing machine and discharging the air from the discharging portion 22a into the rotary tub 6, A heater 24 for heating (see Fig. 4), and the like. The hot air generated by the fan 23 and the heater 24 is supplied mainly from the discharge portion 22a into the rotary tub 6 and then flows through the hole portion 8 into the rotary tub 6 and the water tub 5, . The warm air in the water tub 5 flows out from the discharge duct (not shown) formed on the side wall of the water tub 5, part of which is returned into the rotary tub 6, It is made to be discharged outside the air.

A water supply valve 50 is provided at a rear portion of the top cover 3 to supply water into the rotary tub 6 (in the water tub 5).

An operation panel 25 shown in Fig. 3 is provided on the upper surface of the front cover 3. The operation panel 25 is provided with a power on switch 26, an off switch 27, a start switch 28 serving as both a start and a pause, A washing / drying course selection switch 30 for selecting a washing / drying course, a drying course selection switch 31 for selecting a drying course, a time for executing the washing operation, and the like A rinsing operation setting switch 33 for selecting the number of rinsing operations, a dewatering operation setting switch 34 for setting a dewatering time, a drying operation setting switch 34 for setting a drying time, A water level setting switch 36 for setting a water level, a bath water switch 37 for setting whether or not to use the bath water, a reservation switch 38 for setting a reservation operation, a cover 21, To lock It is the operation dial 40 on the ring disposed on the periphery of the door lock switch 39, a start switch 28 are provided.

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

In Fig. 1, an acceleration sensor 42 as vibration detecting means for detecting the vibration of the water tank 5 is provided on the outer surface of the water tub 5. As shown in Fig. The acceleration sensor 42 outputs a signal corresponding to the magnitude of the 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 a drainage path between the drainage port 5a and the drainage valve 12. [ A circulation pipe (44) is connected to a discharge port of the circulation pump (43). The circulation pipe 44 is led upward through the side of the water tub 5 and passes through the coarse cover 18 and is directed to above the rotating tub 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 mainly composed of a microcomputer, and functions as control means 46a for controlling overall operation of the washing machine by means of a software configuration. The control means 46a includes the washing operation control means 46a1, the abnormal vibration determination means 46a2, the vibration reduction control means 46a3, and the laundry weight detection means 46a4.

The abnormal vibration determination means 46a2 has a first determination reference and a second determination reference as a plurality of determination references as a determination reference for the vibration detection result by the acceleration sensor 42. [ As shown in Fig. 5, each determination criterion is a threshold for determination (a first determination threshold A in the first determination criterion and a second determination threshold B in the second determination criterion) (A first determination reference number M in the first determination reference and a second reference number of times N in the second determination reference) with respect to the number of times the vibration detection result is equal to or more than the determination threshold value to be.

In this case, the thresholds A and B for determination are different from each other, and the number of judgment reference times (first judgment reference number M in the first judgment reference and second judgment reference number N in the second judgment reference) different. For example, the first determination threshold value A, which is the threshold for determination in the first determination standard, is set to the vibration level " 300 " when the laundry weight is less than 3 kg and less than 4 kg, The first determination reference count M as the reference count is set to " 1 ". The second threshold value B for determination as the threshold value for judgment in the second judgment criterion is set to the vibration level " 150 " when the laundry weight is equal to or more than 3 kg and less than 4 kg, and the judgment in the second judgment criterion And the second determination reference number N as the reference number is set to " 4 ". The first determination criterion and the second determination criterion differ according to the laundry weight as shown in Fig. The judgment criteria may be three or more.

That is, as the determination threshold values A and B become smaller, the number of determination reference times M and N increases.

The vibration reduction control means 46a3 and the laundry weight detecting means 46a4 will be described later.

The control device 46 is also provided with a water level sensor 47 as a water level detecting means for detecting the water level in the water tank 5 as the mechanism on the input side, the switches 26 to 39, the operation dial 40, the acceleration sensor 42, A cover opening / closing sensor 48 for detecting the opening and closing of the lid 21, a rotation sensor 49 for detecting the rotation speed of the motor 13, a current sensor 49 for detecting the current flowing through the motor 13, (Not shown).

The control device 46 controls the display section 41, the motor 13, the water supply valve 50, the water supply valve 12, and the water supply valve 12, which are devices on the output side, based on each input signal from the input- The pump 23, the heater 24, the circulation pump 43, the bath water pump 52 and the buzzer 53 that operate the clutch 14 and the clutch 14 are respectively connected to the drive circuit 54 . The drive circuits 54 are collectively referred to as drive circuits of corresponding devices.

The washing and rinsing cycles executed by the washing operation control means 46a1 of the control device 46 will be described with reference to Fig. In the washing cycle, the weight of the laundry is detected by the laundry weight detecting means 46a (Step S10).

The laundry weight detection is performed based on the rotation number obtained by rotating the agitator 11 by applying a constant electric power to the motor 13 while the laundry is housed in the rotary tub 6, (Weight) of the laundry from the comparison of the number of revolutions obtained by applying a constant electric power to the motor 13 and rotating the agitator 11 in a state where the motor 13 is not rotating. The detection data is used for water level setting, abnormal vibration determination, and the like. In such weight detection, any of weight less than 1 kg, less than 1 kg to less than 3 kg, less than 3 kg to less than 4 kg, less than 4 kg to less than 6 kg, more than 6 kg is detected.

The weight of the laundry may be detected based on the current flowing in the motor 13.

In step S20) to step S40, water supply is performed. This water supply opens the water supply valve 50 to water the water in the rotary tub 6 (in the water tank 5) (step S20) while the drain valve 12 is closed (step S20) ) Is stopped (step S40). Thereafter, it is determined whether or not the elapsed time from the start of the washing cycle has exceeded the preset washing time (step S50), and if not elapsed (step S50) Whether the result (vibration detection value) matches the first judgment criterion or the second judgment criterion is executed (step S60).

In other words, the process proceeds to step S60), and it is determined whether the vibration detection result (vibration detection value) by the acceleration sensor 42 is equal to or larger than the first determination threshold value A (see FIG. 5) If NO, it is detected whether or not the vibration detection result is equal to or higher than the second determination threshold value B of the second determination reference (step S70). The determination threshold values A and B and the determination reference number N are selected corresponding to the weight detection result as shown in Fig. Also, the first determination reference count M may be changed to a value other than " 1 ".

If the vibration detection result is not more than the second determination threshold value B of the second determination reference (No in step S70), the washing operation control unit 46a1 executes the normal control washing operation (step S80). In this washing operation, the stirring body 11 is rotated in the forward and reverse directions in the mode shown in Fig. 6A (normal control). That is, the motor 13 for driving the stirring body 11 is started in the forward rotation direction to the rotation speed Ra in the time Ta and the state of the rotation speed Ra is set to the time "Ka" (ka) Continue and shut down. Thereafter, the motor 13 is rotated in the reverse rotation direction in the same pattern as described above with the resting time Da, and then the forward rotation and the reverse rotation are repeated. During the washing operation, the circulation pump 43 is driven to send the water in the rotary tub 6 out of the water tub 5 and to circulate the rotary tub 6 from the upper part of the rotary tub 6 through the circulation pipe 44 ). &Lt; / RTI > As a result, the washing effect on laundry is enhanced. Further, the water level in the rotary tub 6 is slightly lowered by circulation of the water by the circulation pipe 43.

Yes " in the case where the vibration detection result is equal to or larger than the first determination threshold value A (step S60) of the first determination reference and the number of times that the abnormality has occurred is once the first determination reference number M of the first determination reference ), The abnormal vibration determination means 46a2 determines that abnormal vibration has occurred (step S100). Then, vibration reduction control (control change of the motor 13) is executed by the vibration reduction control means 46a3 (step S110). As shown in Fig. 6B, the vibration reduction control is a control for lowering the number of revolutions of the motor 13 in normal and reverse rotation from the number of revolutions "Ra" to "Rb " Thereby, the upper limit rotation speed of the stirring body 11 is lowered and the vibration is reduced.

5) (step S120). If the number of times that the abnormality has occurred is the second determination reference number N (see Fig. 5), the vibration detection result is " YES ") abnormal vibration is present, and vibration reduction control is executed (step S110).

After the normal control washing operation (step S80) and the vibration reduction control execution (step S110), the process returns to whether or not the set washing time has elapsed (step S50).

Thereafter, when the presence of abnormal vibration occurrence is determined again (step S100), the vibration reduction control is executed again (repeatedly) (step S110). That is, when the abnormal vibration determination means 46a2 determines that the abnormal vibration has occurred, the vibration reduction control means 46a3 controls the vibration reduction control 46a2 until the abnormal vibration determination means 46a2 determines the abnormal vibration generation non- Is repeatedly executed.

(No in step S70, No in step S120), the process returns to the irrigation control washing operation (step S80).

If the set washing time has elapsed (step S50), the washing operation (washing operation) is terminated (step S130), and the process proceeds to the next rinsing operation. The control contents of the rinsing cycle are shown in Fig. In Fig. 8, the drainage is first executed (step S140). This drain opens the drain valve 12 to drain the water in the rotary tub 6 and starts the dehydration operation (step S160) when the water level becomes the reset water level which is the predetermined water level (step S150). In this dewatering operation, the rotation of the rotary tub 6 is started corresponding to the predetermined pattern with the progress of time. If the dewatering operation has elapsed (YES at step S170), the dewatering operation is stopped (step S180). At this time, the drain valve 12 is also closed.

Subsequently, water is supplied into the rotating tub 6 (step S190). At this time, when the water level reaches a preset water level (YES in step S200), the water supply is stopped (step S210). Then, it is determined whether or not a predetermined rinsing time has elapsed (step S220). If "No", it is judged whether or not there is a judgment result of presence of abnormal vibration occurrence in the washing operation (step S230). As a result, when it is determined that there is already abnormal vibration occurrence (YES) in the washing operation, the vibration reduction control is executed from the beginning (step S240). If there is no abnormal vibration (step S230) and if the answer is " No ", steps S250 through S310 are performed in the same control as steps S60 through S120 in Fig. 7). However, in step S270, the rinsing operation is performed instead of the washing operation, but the operation pattern (motor control pattern) is the same. That is, it is determined whether or not abnormal vibration has occurred in the same manner as in the case of the washing operation. If the abnormal vibration is not generated, the normal rinse operation (control of the motor 13 as in the washing operation) is executed. . The circulation of the water by the circulation pump 43 is also performed during the rinsing operation.

If the rinsing time has not exceeded the set time (step S220), the rinsing operation (rinsing operation) is terminated (step S220) and the operation proceeds to the next step.

In the above embodiment, the abnormality vibration determination means 46a2 in the software of the control device 46 has the first determination reference and the second determination as the determination reference for the vibration detection result by the acceleration sensor 42 as the vibration detection means It is determined that abnormal vibration occurs when the vibration detection result matches the determination reference in the washing operation or the rinsing operation.

In the case of determining an abnormal vibration with only one determination criterion (for example, only one threshold value), if the determination criterion is set to be slightly larger in order to determine a large abnormal vibration pattern, It can not be determined that abnormal vibration has occurred. If the threshold value is simply set to a small value, the presence of abnormal vibration occurrence is frequently determined. Further, it is judged that a relatively small vibration, which is likely to converge, is generated as abnormal vibration.

According to the above-described embodiment, a plurality of determination criteria are set as the determination reference, and when any one of the plurality of abnormal vibration patterns is generated after the vibration detection result is determined as the occurrence of the abnormal vibration It can be determined that there is an abnormal vibration occurrence, and it is possible to improve the accuracy of abnormal vibration determination.

In the present embodiment, the first judgment criterion and the second judgment criterion are set to a judgment threshold value (a first judgment criterion A in the first judgment criterion, a second judgment criterion A in the second judgment criterion, (The threshold value B for judgment), the number of times of judgment reference set for the number of times the vibration detection result is equal to or more than the judgment threshold value (the first judgment reference number M, the second judgment reference number M, Determination reference number of times N). Further, the determination thresholds for the respective determination criteria are set to different values, and the determination criterion number M, N increases as the determination threshold values A and B become smaller. When the number of times that the vibration detection result is equal to or higher than the determination threshold value in at least one determination reference and the determination vibration threshold value is equal to or higher than the determination reference frequency in the determination reference, Vibration was judged to have occurred.

According to this, even in the pattern of large abnormal vibration having a small frequency of occurrence, abnormal vibration can be determined to exist even in a pattern of small abnormal vibration having a relatively large occurrence frequency, and accuracy of abnormal vibration determination can be enhanced.

Then, when the abnormal vibration determination means 46a2 determines that abnormal vibration has occurred, the vibration reduction control means 46a3 performs the vibration reduction control, thereby eliminating the abnormal vibration. Therefore, it is possible to reduce the stress on the electric wiring in the washing machine 1, the circulation pipe 44, and the like.

In this embodiment, the first determination reference number M of the first determination threshold value A as the high threshold value is set to 1, that is, the minimum number of times, and the second determination reference number of the second determination threshold value B In the case of the second determination threshold value B of the second determination reference number of times N in which the convergence speed is not expected at the time of occurrence of a relatively small abnormal vibration, It can be determined that abnormal vibration has occurred.

Further, in the above embodiment, circulation of water by the circulation pump 43 is performed during the washing operation and the rinsing operation, whereby the cleaning effect can be improved. On the other hand, on the other hand, it is expected that the water level in the rotary tub 6 is lowered by the operation of the circulation pump 43, thereby increasing the generation of vibration. However, in this embodiment, since the accuracy of the abnormal vibration determination can be enhanced, the washing operation is not continued as the abnormal vibration is generated.

In the present embodiment, laundry weight detecting means 46a4 for detecting the weight of the laundry is provided. The abnormal vibration determining means 46a2 sets the determination threshold values A and B and the determination reference number N to the laundry weight detecting means 46a4 in accordance with the weight of the laundry.

The magnitude and frequency of the abnormal vibration are related to the weight of the laundry. For example, when the weight of the laundry is light, the influence of the acceleration sensor 42 on the internal electric wiring, the circulation pipe 44, and the like is small even when the acceleration sensor 42 detects a large vibration. The influence on the internal wiring, the circulation pipe 44 and the like is large.

As can be seen from Fig. 5, any of the first determination threshold value A for determining a large abnormal vibration and the second threshold value B for determination, which is a relatively small abnormal vibration determination, The lighter the weight of the laundry, the larger it is. The second determination reference number N for the second determination threshold value B also increases as the weight of the laundry becomes light. Thus, the influence on the internal wiring, the circulation pipe 44, and the like can be reduced.

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

If the abnormal vibration determination means 46a2 determines that abnormal vibration has occurred during the washing operation, the probability of occurrence of the abnormal vibration is high even in the rinsing operation, which is almost the same operation as the washing operation. According to the embodiment described above, when the abnormal vibration determination means 46a2 determines abnormal vibration occurrence in the washing operation, the vibration reduction control by the vibration reduction control means 46a3 is performed from the beginning during the rinsing operation, The abnormal vibration in the rinsing operation can be prevented in advance.

In the present embodiment, when the abnormal vibration determination means 46a2 determines that abnormal vibration has occurred, the abnormal vibration determination means 46a2 repeatedly executes the vibration reduction control until it determines the abnormal vibration occurrence state, Can be reduced in turn.

Further, in the present embodiment, the circulation mechanism 45 is provided, which improves the cleaning effect at the time of operation of the circulation mechanism 45, but the water level in the rotation tank 6 is reduced and vibration is likely to occur. Therefore, in the present embodiment, the presence or absence of abnormal vibration is determined as described above, and the vibration reduction control is performed in accordance with the determination result, so that the vibration can be reduced even in a situation where such vibration is likely to occur.

In addition, the circulation mechanism 45 may switch between the case of operating it and the case of not operating, in accordance with the washing operation course or by the user at will. It is also possible to change the threshold values A and B for limiting and the number of determination criteria M and N set for each of the threshold values A and B in the case where the circulation mechanism 45 is operated or not. For example, the determination threshold values A and B for operating the circulation mechanism 45 and the determination reference counts M and N for each threshold value are set to a threshold value for determination when the circulation mechanism 45 is not operated A, B, and the number M, N of thresholds of the thresholds.

Fig. 9 shows a second embodiment. The control contents by the vibration reduction control means 46a3 in the second embodiment are different from those in the first embodiment. The vibration reduction control in the first embodiment is similar to the vibration reduction control in the second embodiment in that the rotation start time of the motor 13 is the time "Tb " " The time "Tb" is set to be longer than the rotation start time Ta to the rotation number Ra of the motor 13 in the normal control shown in Fig. 6A. As a result, the starting of the motor 13, that is, the starting of the stirring body 11 can be made smooth, so that the vibration can be reduced.

Fig. 10 shows a third embodiment. In the vibration reduction control in the third embodiment, the downtime of the motor 13 is set to the time "Db ". The time Db is set longer than the downtime Da of the motor 13 in the normal control shown in Fig. 6A. As a result, the non-driving time of the motor 13, that is, the non-driving time of the stirring body 11 becomes longer and the vibration is reduced.

11 and 12 show a fourth embodiment. In the fourth embodiment, the following points are different from the first embodiment in the flowchart of Fig. 7 of the first embodiment. That is, when it is judged that there is abnormal vibration occurrence in the detection contents of the first determination threshold value A (vibration degree: large) with the detection result of the acceleration sensor 42 being "large" and once (step S90) And the second detection reference number N (step S120) in which the detection result of the acceleration sensor 42 is smaller than the first determination threshold value A and the second determination threshold value B (Step S160), the control contents of the vibration reduction control (step S150) and the step S170 are different.

(Step S 140), the upper limit number of revolutions of the motor 13 shown in Fig. 12A is set to "Rb" (vibration reduction control (large) 12B, the upper limit number of revolutions of the motor 13 is set to be slightly higher than the "Rb" (upper limit number of revolutions of the normal control (Ra (Ra)) ) Lower] rotation speed Rc (vibration reduction control (middle)).

According to the fourth embodiment, by changing the upper limit number of revolutions of the motor 13 in the vibration reduction control in accordance with the magnitude of the abnormal vibration, the vibration reduction control can be performed in an insufficient manner.

13 shows the fifth embodiment, and the following point is different from the fourth embodiment. 13A, the start time of the motor 13 is set to the time "Tb " and the result of the vibration detection is" middle " The start time of the motor 13 is set to the time "Tc" (Ta < Tc < Tb) as shown in Fig. 13B.

According to the fifth embodiment, by changing the rotation start time of the motor 13 in the vibration reduction control in accordance with the magnitude of the abnormal vibration, the vacuum reduction control can be performed in an insufficient manner.

Fig. 14 shows a sixth embodiment, and the following point is different from the fourth embodiment. 14A, the stopping time of the motor 13 is set to the time "Db ", and the result of the vibration detection:" middle " When it is determined that there is an abnormal vibration occurrence, the downtime of the motor 13 shown in Fig. 14B is set to the time Dc (Da <Dc <Db).

According to the sixth embodiment, it is possible to carry out the vibration reduction control with little or no change by changing the dwell time of the motor 13 in the vibration reduction control corresponding to the magnitude of the abnormal vibration.

15 and 16 show a seventh embodiment. In the seventh embodiment, a temperature sensor 60 for detecting the temperature of the installation environment of the washing machine 1 is provided. The temperature sensor 60 is attached to the inner surface of the outer box, for example. In addition, the abnormal vibration determination means 46a2 compares the first determination threshold value A, the second determination threshold value B, and the second determination reference number N with the temperature detected by the temperature sensor 60, As shown in Fig. In this case, each of the determination thresholds A and B corresponding to the weight detection result and the determination result in the case where the detection temperature is less than 10 ° C, 10 ° C or more and less than 20 ° C, 20 ° C to 30 ° C, The reference number N is changed.

For example, as the temperature of the installation environment of the washing machine 1 becomes higher, the vibration detection result by the acceleration sensor 42 tends to be larger than the vibration of the water tank 5 actually. In this case, since the vibration of the water tank 5 is actually small, the influence on the internal wiring, the circulation pipe 44 and the like is small.

In the seventh embodiment in consideration of this point, the first determination threshold value A, the second determination threshold value B, and the second determination reference number N are changed in accordance with the temperature detected by the temperature sensor 60 , It becomes possible to control the vibration reduction corresponding to the vibration of the actual water tub 5. The first determination reference count M may also be changed.

17 differs from the first embodiment in the following points regarding the eighth embodiment. In the eighth embodiment, as a course of operation to be executed by the control means 46a, laundry of a standard course (cloth) (cotton or chemical fiber blend) is washed in a plurality of driving courses, for example, It is equipped with a standard course, a conservation course to conserve water and power, a reclamation course where laundry is called, a bloom course suitable for washing blanket, and a dry course suitable for dry laundry. Then, the abnormal vibration determination means 46a2 changes the first determination threshold value A, the second determination threshold value B, and the second determination reference number N in accordance with the driving course as shown in Fig.

In the eighth embodiment, the vibration reduction control corresponding to the driving course becomes possible. The first determination reference count M may also be changed.

18 differs from the eighth embodiment in the following point regarding the ninth embodiment. In the ninth embodiment, a driving course at a normal time (which is the standard course, the saving course, the sounding course, the bamboo course, the dry course) and the driving course at the time of reservation setting A course, a blanket course, and a course set for a dry course). Then, the abnormal vibration determination means 46a2 changes the first determination threshold value A, the second determination threshold value B, and the second determination reference number N in accordance with the driving course as shown in Fig. 18 . That is, the first determination threshold value A, the second determination threshold value B, and the second determination reference number N of the normal driving course are set to be lower (smaller) on the driving course at the time of reservation setting.

When the driving course at the time of reservation setting is executed, the execution time is often a quiet time zone such as night or dawn. In this case, when abnormal vibration occurs, many users feel noisy. In the ninth embodiment in consideration thereof, the first determination threshold value A, the second determination threshold value B, and the second determination reference number N of the normal driving course are compared with the first determination in the case of the driving course at the time of reservation setting The threshold value A, the second determination threshold value B, and the second determination reference number N are set to be low (small). Therefore, at the time of execution of the driving course at the time of reservation setting, the vibration reduction control is executed while the abnormal vibration is small And noise generation can be reduced. The first determination reference count M may also be changed.

19 to 21 show a tenth embodiment, and the following point is different from the first embodiment. As shown in Fig. 19, the control device 46 includes a nonvolatile memory 61 for storing the number of times the vibration reduction control means 46a3 has executed the vibration reduction control as the storage means. The display section 41 and the buzzer 53 correspond to the notification means. The control means 46a executes the control shown in Fig. 20 at the end of the washing operation. First, the number of times the vibration reduction control means 46a3 has executed the vibration reduction control from the nonvolatile memory 61 is read (step T10). In the first step, the execution count is zero. Next, it is determined whether or not the vibration reduction control means 46a3 has executed vibration reduction control in the washing operation at this time (Step T20). If the vibration reduction control means 46a3 has executed the vibration reduction control at Step T20 (Yes in Step T20) Counts up) (step T30), and stores the count value in the nonvolatile memory 61 (step T40). Then, it is judged whether or not the count value (execution frequency) has reached a predetermined number or more (step T50). If the count value is more than the predetermined number (step T50), the display section 41 notifies the count value (step T60). As a specific notification content, for example, the character " check " is displayed on the display unit 41 in a blinking or lighting manner as shown in Fig. In this case, the buzzer 53 may be made to sound.

The indication of the " check " is that the vibration reduction control is executed frequently (the determination of existence of abnormal vibration is frequently made) is problematic in the installation situation of the washing machine 1, Since it is thought that it is big, it means to prompt the check. Alternatively, instead of the execution frequency of the vibration reduction control, the abnormal vibration occurrence existence determination count may be counted, and the notification may be performed when the count number reaches the predetermined number of times or more.

Fig. 22 shows an eleventh embodiment. The eleventh embodiment is different from the first embodiment in that steps S51 to S56 are provided for the flowchart of FIG. 7 of the first embodiment. That is, it is determined whether or not the water level (the water level detected by the water level sensor 47) in the rotary tub 6 is less than the predetermined water level when the determination of whether or not the set washing time has elapsed (step S50) (Step S51). The predetermined water level is set to a relatively low water level. (YES in step S51), the vibration detection result by the acceleration sensor 42 is compared with the first determination threshold value A of the first determination reference Is greater than or equal to the threshold B for the second determination) (step S52). If the number of times that the vibration detection result is equal to or more than the first determination threshold value A of the first determination reference and equal to or more than the first determination threshold value A is once as the first determination reference number M of the first determination reference (step S53 ), The abnormal vibration determination means 46a2 determines that abnormal vibration has occurred (step S55). Then, the vibration reduction control is executed (step S56). If " NO " in the step S52) or the step S53), the washing operation of the normal control is executed (step S54).

In the case where the water level is equal to or higher than the predetermined water level ("No" in step S51), it is judged whether or not the vibration detection result matches the first judgment reference and the second judgment reference as in the first embodiment, And executes vibration reduction control or normal control according to the result (steps S60 to S110).

In the eleventh embodiment, when the abnormal vibration determination means 46a2 determines that the water level in the rotary tub 6 is less than the predetermined water level, the first determination standard, which is the determination standard with the larger determination threshold value, is used among the plurality of determination standards, The occurrence of abnormal vibration is judged using the first and second judgment criteria which are a plurality of judgment criteria.

When the water level in the rotary tub 6 is small, the laundry moves well by the agitating operation of the stirring body 11, and the water tub 5 is also easily moved. That is, a large abnormal vibration is likely to occur as the abnormal vibration. Here, in the eleventh embodiment, the abnormal vibration is judged using only the first determination criterion having the threshold value for judgment A having a large threshold value for judgment at a low water level, so that it is not necessary to monitor the small abnormal vibration. When the water level is equal to or higher than the predetermined water level, the occurrence of the abnormal vibration is judged using the first and second judgment criteria, and the small abnormal vibration frequently occurring without the convergence is judged to be satisfactory can do.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other forms, and various omissions, substitutions, and alterations can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention described in the claims and their equivalents.

1: Washing machine 5: Water tank
6: Turntable 11: Agitator
13: motor 41: display unit (notifying means)
53: buzzer (notifying means) 42: acceleration sensor (vibration detecting means)
45: circulation device 46: control device
46a: Control means 46a1: Washing operation control means
46a2: abnormal vibration determination means 46a3: vibration reduction control means
46a4: laundry weight detecting means 60: temperature sensor
61: Nonvolatile memory (storage means)

Claims

water tank,
A rotating tub which is rotatably installed around the longitudinal axis of the water tub and accommodates laundry therein,
An agitator provided rotatably on an inner bottom portion of the rotating vessel,
Vibration detecting means for detecting vibration of the water tank,
Washing operation control means for rotating the agitator in normal and reverse directions to perform washing operation or rinsing operation,
Wherein the vibration detection means has a plurality of determination criteria as a determination reference for the vibration detection result by the vibration detection means, and when the vibration detection result by the vibration detection means is in agreement with any of the determination standards during the washing operation or the rinsing operation Abnormality vibration determination means for determining that vibration has occurred, and
And vibration reduction control means for performing vibration reduction control when it is determined by the abnormal vibration determination means that abnormal vibration has occurred.

The method according to claim 1,
Wherein each of the determination criteria is a combination of a determination threshold value set for the vibration detection result and a determination reference number set for the number of times the vibration detection result is equal to or greater than the determination threshold value,
Wherein each of the judgment criteria has a relationship that the judgment threshold value is different from each other and the smaller the judgment threshold value is,
Wherein the abnormality vibration determination means determines that the vibration detection result by the vibration detection means is equal to or greater than the determination threshold value in at least one determination reference and the number of times that the vibration detection result is equal to or more than the determination threshold value is smaller than the determination reference And judges that abnormal vibration has occurred when the number of times is reached.

3. The method according to claim 1 or 2,
And laundry weight detecting means for detecting the weight of the laundry,
Wherein the abnormal vibration determination means changes the plurality of determination criteria in accordance with the laundry weight detected by the laundry amount detection means.

3. The method according to claim 1 or 2,
And a temperature sensor for detecting the temperature of the washing machine installation environment,
Wherein the abnormal vibration determination means changes the plurality of determination criteria in accordance with the temperature detected by the temperature sensor.

3. The method according to claim 1 or 2,
A plurality of driving courses are provided,
And the abnormal vibration determination means changes the plurality of determination criteria in accordance with the driving course.

3. The method of claim 2,
Wherein the abnormality vibration determination means uses a determination criterion having a larger determination threshold value among the plurality of determination criteria when the water level in the rotation tank is less than a predetermined water level and uses the plurality of determination criteria when the water level is equal to or higher than the predetermined water level And judges occurrence of abnormal vibration.

3. The method according to claim 1 or 2,
Wherein when the abnormal vibration determination means determines that abnormal vibration has occurred in the washing operation, the vibration reduction control by the vibration reduction control means is performed from the beginning during the rinsing operation.

3. The method according to claim 1 or 2,
Wherein the vibration reduction control means repeatedly executes the vibration reduction control until the abnormal vibration determination means determines the abnormal vibration occurrence non-existence state when the abnormal vibration determination means determines the occurrence of the abnormal vibration.

3. The method according to claim 1 or 2,
Storage means, and notification means,
Wherein the vibration reduction control means stores the number of times the vibration reduction control means has executed the vibration reduction control in the storage means and notifies the notification means when the number of times of execution exceeds a predetermined number.