JP2006311886A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine capable of accurately controlling a rotation driving device which causes the vibration of an outer casing to appropriately cope with complaints of a user of the washing machine against the vibration of the outer casing by directly detecting the vibration of the outer casing, and capable of more effectively dewatering the laundry with the vibration. <P>SOLUTION: The vibration of the outer casing can be directly detected by an acceleration sensor, etc. mounted on the outer casing of the washing machine as a vibration detecting means 110. Accordingly, the vibration of the outer casing, which may be the direct cause of complaints of the user of the washing machine against the vibration, can be more accurately detected, and the accurately detected vibration of the outer casing can be appropriately controlled by a rotation driving means such as a driving motor 10 for driving a drum. A reference value of vibration at an arbitrary rotational frequency can be set and stored in a storage device 111, and therefore, by controlling the rotational frequency of the drum according to the result of comparison between the vibration value and the reference value of the outer case by a comparing means 112, more effective dewatering with reduced vibration is possible for the user. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a washing machine that rotatably supports a drum that can store laundry in an outer tub and elastically supports the outer tub in an outer box.

As a conventional example, a dehydrator equipped with an abnormal vibration detection device with improved accuracy for detecting abnormal vibration regardless of the rotational speed of the drum has been proposed (see Patent Document 1). In this dehydrator, the abnormal vibration detection device includes a comparison unit that compares the actual measurement value by the vibration detection unit with the reference value stored in the storage unit, and the actual measurement value is a reference value based on the comparison result by the comparison unit. By providing a control means for instructing the drive means to lower the drum rotation speed when it is larger than that, the detection accuracy of abnormal vibration can be improved regardless of the drum rotation speed, and efficient dehydration can be performed. I am trying to make it.
Japanese Examined Patent Publication No. 7-90067 (page 3, left column, line 11 to right column, line 11, FIG. 1)

  However, for users of washing machines, the direct cause of dissatisfaction due to abnormal vibration is not the vibration of the outer tub but the vibration of the outer box. In the method of detecting abnormal vibration by measuring the vibration of the outer tub as in the conventional example, the vibration of the outer tub does not necessarily represent the vibration of the outer box, and there is a limit to accurate vibration detection. there were.

  Thus, there is a problem to be solved in that the vibration of the outer box is directly detected and the rotational drive device that causes the vibration of the outer box can be accurately controlled.

  The object of the present invention is to accurately control the rotary drive device that causes the vibration of the outer box, and to cope with the dissatisfaction with the vibration of the outer box held by the user of the washing machine. It is to provide a washing machine that can perform dehydration.

  The washing machine according to the present invention includes an outer box, an outer tub elastically supported by the outer box, a drum that is rotatably supported by the outer tub and can store laundry, a rotation driving unit of the drum, and vibration of the outer box. Vibration detecting means for detecting, rotation detecting means for detecting the rotation speed of the drum, storage means for storing a reference value set according to the rotation speed of the drum with respect to the vibration of the outer box, drum rotation speed detected by the rotation detecting means Comparison means for comparing the vibration detection signal from the vibration detection means and the reference value stored in the storage means, and control means for controlling the rotation drive means based on the comparison result of the comparison means.

  According to this washing machine, by providing the vibration detection means for detecting the vibration of the outer box, the user of the washing machine can more accurately detect the vibration of the outer box that directly causes dissatisfaction with the vibration. Thus, it is possible to appropriately control the rotation driving means for driving the drum against the accurately detected vibration of the outer case. In addition, since the reference value of vibration can be arbitrarily set at an arbitrary number of rotations, the comparison result between the vibration value of the outer box and the reference value is used so that low vibration and more effective dehydration for the user. Accordingly, the drum rotation speed can be controlled.

  This washing machine includes capacity detection means for detecting the capacity of the laundry, and the reference value stored in the storage means can be set according to the number of rotations of the drum for each capacity classification. That is, by having a reference value for the vibration of the outer box for each capacity category, it is possible to consider the difference in the vibration mode depending on the capacity for the vibration of the outer box, and for the user, it is possible to reduce the More effective dehydration can be performed by vibration.

  In the above washing machine, when the value of the vibration of the outer box detected by the vibration detection unit is larger than the reference value stored in the storage unit at the number of rotations of the drum at the time of detection, the control unit is The rotation driving means can be controlled in such a manner that the rotation of the drum is on the safe side. In this washing machine, when the vibration value of the outer case is larger than the stored reference value, the rotation of the drum is driven to the safe side, that is, the rotation number of the drum is reduced. By reducing or stopping, the vibration value of the outer box can be reduced. As a result, dissatisfaction with the vibration of the user's washing machine can be reduced more accurately.

  In the washing machine described above, when the vibration value of the outer box detected by the vibration detection unit is the same as the reference value stored in the storage unit at the rotation speed of the drum at the time of detection, the control unit The rotation driving means can be controlled in such a manner that the rotation of the drum is not changed. In this washing machine, when the value detected by the vibration of the outer box is the same as the stored reference value, the vibration value of the outer box is taken by taking a measure that the rotation speed of the drum is not changed. It is possible to reduce the vibration value of the outer box due to the correction of the unbalanced state of the clothes inside the drum, which may occur with the progress of water scattering, while suppressing the rise of the water. As a result, it is possible to suppress an increase in washing (dehydration) time and wasteful power consumption that occur when the rotational speed is reduced.

  In the washing machine, when the vibration value of the outer box detected by the vibration detection unit is smaller than the reference value stored in the storage unit at the number of rotations of the drum at the time of detection, the control unit is The rotation driving means can be controlled in such a manner as to increase the rotation of the drum. In this washing machine, when the value detected by the vibration of the outer box is smaller than the stored reference value, there is room for increase in the rotational speed of the drum. By increasing the number of revolutions of the drum, it becomes possible to increase the amount of water splashed by the laundry due to a greater centrifugal force, so that the drying time of the laundry after dehydration can be shortened.

  The washing machine preferably includes input setting means for setting the reference value stored in the storage means to be changeable. According to this washing machine, by changing the stored reference value by the input setting means, the reference value is adjusted to the usage environment such as the floor surface on which the washing machine is placed and the sensitivity to vibration of the user. Setting is possible.

  In the above washing machine, provided with an informing means for informing the user, and when the vibration detecting means detects one or more times of vibrations of the outer box equal to or greater than a predetermined limit value, the control means provides the informing means. It is preferable to perform the notification operation. According to this washing machine, when the vibration detecting means detects the vibration of the outer box exceeding the limit value once or a plurality of times, the notifying means is operated to notify the user, thereby causing an abnormality due to the malfunction of the washing machine. By transmitting the vibration to the user, the user can respond more quickly. In addition, in the vibration inspection process at the manufacturing factory, it is possible to reduce the burden on the inspector and the inspection equipment such as attaching a vibration measuring device to a product and performing a pass / fail determination as conventionally performed.

  The washing machine may include display means for displaying the value of the outer box vibration detected by the vibration detection means. According to this washing machine, since the value obtained by the vibration detection means is displayed by the display means, the user can directly measure and confirm the amplitude value of the outer box of the washing machine. In addition, in the vibration inspection process at the manufacturing factory, it is possible to reduce the burden on the inspector and the inspection equipment such as attaching a vibration measuring device to a product and performing a pass / fail determination as conventionally performed.

  The washing machine includes a selection unit that selects an operation course according to the type of laundry, and the storage unit sets a reference value for the vibration of the outer box according to the number of rotations of the drum for each operation course. ing. According to this washing machine, more effective dehydration can be performed in consideration of the difference in the vibration mode by providing the reference value of the storage means at an arbitrary number of revolutions for each driving course.

  In the washing machine according to the present invention, it is possible to more accurately detect the vibration of the outer box, which directly causes dissatisfaction with the vibration of the user of the washing machine, by including vibration detection means for detecting the vibration of the outer box. Can do. Further, since the drum rotation driving means is controlled based on the accurately detected vibration of the outer box, the drum can be driven so as to suppress the drum swinging due to the unbalance of the laundry, for example. . In addition, by arbitrarily controlling the number of rotations according to the comparison result between the vibration value of the outer box and the reference value at any number of rotations, the vibration value can be arbitrarily changed, and the vibration is low and more effective for the user. Dehydration can be performed. It can also be used as a safety device that detects abnormal vibrations.

  Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an example of a washing machine according to the present invention, and FIG. 2 is a top sectional view of the washing machine shown in FIG. As shown in FIG. 1, the washing machine is a drum-type washing machine in which a drum into which laundry can be put is rotated by an oblique rotation shaft, and a door for putting laundry in and out of the front of the outer box 1. 8 is provided, and a display / operation unit 19 related to the washing operation of the drum type washing machine is provided on the front upper portion of the outer box 1.

  The water tank 2 is elastically supported from below by an anti-vibration damper 6 with respect to the outer box 1 placed on the floor G, and has a structure capable of absorbing vibrations generated during washing, rinsing and dehydration. . In this example, the water tank 2 is not hung from the top with respect to the outer box 1 by a spring, but may be hung and supported as such. Inside the aquarium 2, a drum 3 that can store laundry is supported and arranged in a manner that allows the drum 3 to rotate about a rotating shaft that is slightly inclined upwardly from the horizontal axis. The peripheral wall of the drum 3 is provided with a large number of small holes 4 (only a part is shown) for supplying or discharging washing water. A gap between the laundry door 8 and the water tub 2 is sealed by a door packing 9 so that the washing water does not leak outside the machine through the gap. A door switch (not shown) having detection means for detecting opening and closing of the door 8 is attached to the door 8. In addition, a fluid balancer 107 is provided at the periphery of the opening of the drum 3 to prevent the whirling.

  By opening the water supply valve 18, the tap water dissolves the detergent in the detergent case 21, and the generated detergent liquid is supplied into the drum 3 from the water supply port 14. In order to rotate the drum 3, a DD (direct drive) type drive motor 10 as a rotational drive means is disposed in the inner part of the outer box 1. A baffle 17 that lifts the laundry in the drum 3 is formed on the inner peripheral surface of the drum 3, and the laundry that is lifted while being locked to the baffle 17 as the drum 3 rotates falls by its own weight. By repeating the operation (tumbling), the laundry has a beating action, and the laundry can be washed and rinsed. The amount of cloth (capacity) of the laundry is based on the time until the laundry is lifted to the upper position of the drum 3 during the initial rotation of the drum 3 (the phenomenon that a longer time is required as the capacity increases) is used. It can be weighed.

  A drainage pump 11 for discharging the washing liquid to the outside of the machine is provided at the bottom of the outer box 1 and outside the water tank 2. In the middle of the drainage duct 7 connecting the lower part of the water tank 2 and the drainage pump 11, a lint filter (not shown) that can be removed from the entire lower part of the outer box 1 is provided. The pressure change is detected as a pressure change in an air trap (not shown) provided on the top of the waste filter, and the pressure change is detected by a water level sensor by a pressure guiding pipe connected between the air trap and the water level sensor. The water level is detected based on the change. The detergent liquid at the time of washing and the water at the time of rinsing are supplied into the drum 3 through the water supply port 14.

  As shown in FIG. 2, an acceleration sensor 110 as vibration detection means for detecting the vibration of the outer box 1 is attached on the side inner wall surface of the outer box 1. The acceleration sensor 110 can be a general-purpose three-axis acceleration sensor, for example. The acceleration sensor 110 can output an electrical signal proportional to the magnitude of acceleration (a voltage signal of ± 0.2 V per acceleration 1G), but is not limited thereto. The vibration detection means is not limited to an acceleration sensor, but may be other methods, for example, an optical distance measurement means, a magnetic or mechanical detection means such as a proximity switch. A general-purpose three-axis acceleration sensor can be attached to the upper back side of the water tank 2 as vibration detection means for detecting the vibration of the water tank 2. A control circuit 20 is disposed behind the display / operation unit 19. Further, in relation to the drive motor 10, rotation detection means (see reference numeral 105 in FIG. 4) for detecting the rotation speed of the drum 3 is provided.

  In the dehydration process, the rotation speed of the drum 3 varies over a wide range from a low speed to a high speed. Therefore, the detection of the imbalance of the laundry in the drum 3 is performed using the operation state at the low speed rotation of the dehydration process. It is preferable. While the drum 3 is rotated at a low speed (critical speed) that allows the laundry to stick to the inner surface of the peripheral wall, an unbalance detection that detects the eccentric amount that is the magnitude of the eccentric load of the drum 3 is performed. If it is below the determination value, the drum 3 can be shifted to high speed rotation as it is. The washing liquid and the rinsing water contained in the laundry are discharged in such a manner that the laundry is pressed against the inner surface of the peripheral wall of the drum 3 using the centrifugal force during the high-speed rotation operation of the drum 3. At this time, the washing liquid and the rinsing water are blown outward from the small holes 4 of the drum 3, are guided to the lower part of the water tank 2, and are discharged to the outside by the drain pump 11. On the other hand, if it is determined that the drum 3 is unbalanced when the drum 3 is unbalanced, the rotation of the drum 3 is stopped, and the process returns to the beginning of the dehydration process to detect unbalance. Even when abnormal vibration is detected during dehydration, the rotation may be stopped similarly to the above-described imbalance detection, and the operation of returning to the top of the dehydration process and performing unbalance detection may be performed.

  FIG. 3 shows an example of the display / operation unit 19. The display / operation unit 19 includes a power on / off switch 19a, a start / pause switch 19b, a course switch 19c, a notification buzzer switch (pressed when the buzzer is stopped) 19d, a washing switch 19e, and a drying switch 19f. The washing switch 19e includes a washing switch 19g, a rinsing switch 19h, and a dewatering switch 19i. As the display device 102, a standard course is shown in the illustrated state. Although not shown, the display / operation unit 19 can be provided with input setting means (such as a numeric keypad, 101 in FIG. 4 described later) used to input various setting values.

  FIG. 4 is a block diagram showing an example of the control circuit 20 of the washing machine according to the present invention. The main component of the control circuit 20 which is the control means in the present invention is a microcomputer 22, which is a CPU (central processing circuit) 23, a RAM 24, a ROM 25, a timer 26, a system bus 27 and a plurality of I / Os. The O port 28 is configured. The microcomputer 22 operates when a constant voltage is supplied from the power supply circuit 31 to the power supply terminals Vdd and Vss, and can be reset by a signal input from the reset circuit 32 to the RESET terminal.

  The CPU 23 includes a control unit 29 and a calculation unit 30. The control unit 29 takes out an instruction stored in the ROM 25 and executes the instruction. The arithmetic unit 30 performs operations such as binary addition, logical operation, increase / decrease, and comparison on data input from various input devices and the RAM 24 based on a control signal given from the control unit 29 in the execution stage of the instruction. . Therefore, the ROM 25 stores in advance means for operating various devices, conditions set for various determinations, rules for processing various information, and the like.

  The microcomputer 22 is connected to an input key circuit 33, a state detection circuit 34, a display device driving circuit 35, a buzzer driving circuit 36 and a load driving circuit 37 via a plurality of I / O ports 28. The input key circuit 33 is connected to the input setting means 101 including various operation buttons in the display / operation unit 19, and the state detection circuit 34 is connected to the rotation detection means 105, the vibration detection means 110, the storage means 111, and the comparison means 112. Has been. The input key circuit 33 and the state detection circuit 34 serve to input signals from the outside to the microcomputer 22. Further, the display device driving circuit 35 is connected to the display device 102, and the buzzer driving circuit 36 is connected to the buzzer 103. It is for telling that. Further, the load drive circuit 37 is connected to a supply / exhaust system such as a pump and a valve starting with the drive motor 10. The microcomputer 22 performs an operation based on the input signals input from the input key circuit 33 and the state detection circuit 34, and outputs signals to the display device driving circuit 35, the buzzer driving circuit 36, and the load driving circuit 37, and correspondingly. Each device is driven. As the rotation detecting means 105, a method of detecting based on a signal from a hall sensor or a tachometer is generally used. The vibration detection means 110 corresponds to an example of a vibration detection device attached to the outer case 1 in the present invention, and specifically, is a triaxial acceleration sensor as described above.

  The storage unit 111 stores a reference value set according to the rotation speed of the drum 3 with respect to the vibration of the outer box 1. Examples of the reference values include the examples shown in FIGS. 6 and 7, which will be described later. The comparison unit 112 compares the vibration detection signal from the vibration detection unit 110 with the reference value stored in the storage unit 111 at the number of rotations of the drum 3 detected by the rotation detection unit. The microcomputer 22 controls the drive motor 10 which is a rotation drive unit based on the comparison result of the comparison unit 112. Specific control contents will be described based on the flowchart shown in FIG.

  The drum type washing machine of this embodiment is configured as described above, and a washing process, a rinsing process, and a dehydrating process are sequentially performed. The washing process is started by opening the door 8 for opening and closing, loading the laundry from the laundry inlet, and turning on the start / pause switch 19b of the operation panel 19. When the start switch is turned on, the drum 3 starts to rotate at a low speed by the drive motor 10. Then, the water supply valve 18 is opened, and the water from the water supply valve 18 melts the detergent in the detergent case 21 to become a detergent liquid and is supplied into the drum 3 from the water supply port 14.

  When the water level sensor detects that the water tank 2 has reached a predetermined water level, the water supply valve 18 is closed. The supplied detergent liquid is poured into the laundry rotating in the drum 3 and penetrates into the laundry. The laundry containing the detergent solution is repeatedly tumbled, and the laundry is washed by the impact force when dropped. This tumbling can be performed by rotating the drum 3 at 55 rpm for 10 seconds, for example, and stopping for 3 seconds.

  Then, when a predetermined time set in advance elapses, the drum 3 is stopped, and the washing liquid in the water tank 2 and the drum 3 is drained through the drainage duct 7 by driving the drainage pump 11. At the time of this drainage, the lint contained in the drainage liquid is removed by a lint filter disposed in the drainage path between the drainage duct 7 and the drainage pump 11.

  Next, in the rinsing step, water rinsing is performed in which the drum 3 rotates while the water supply valve 18 and the drainage pump 11 are operating. Although the case where the water injection rinse process is performed after a washing process is demonstrated to an example below, after the washing process, the above-mentioned intermediate dehydration process and the reservoir rinse process may be performed, and the water injection rinse process may be performed after that.

  FIG. 5 is a flowchart showing an example of drum rotation drive control by the control means of the washing machine according to the present invention. According to this flowchart, at the start of driving, a driving course is first input (step 1, abbreviated as “S1”, the same applies hereinafter). When the driving course is set, the washing machine automatically measures the capacity, that is, measures the amount of laundry (S2). The capacity measurement can be measured, for example, as the time required for the drum to make a half rotation from the start of operation.

  When the volume measurement is completed, the cleaning process is normally started. However, for the sake of explanation in this flowchart, the dehydration process operated at the highest rotational speed is started (S3). In the dehydration step, first, a value 0 is input to an abnormal vibration count T that is counted up when the vibration is abnormally exceeding a preset limit value (S4). Next, dehydration time measurement is started (S5). After the dehydration is started, the drum rotation speed R increases (S6). The rotational speed R of the drum is measured (S7). The amplitude value A of the outer box is measured by the vibration detection means which is a sensor attached to the outer box (S8). It is determined whether or not the measured amplitude value A is larger than a reference value stored in advance in the storage means at an arbitrary rotational speed R (S9). If the determination in S9 is Yes, it is determined whether or not the amplitude value A exceeds the limit value (S10).

  If the determination in S10 is Yes, the amplitude value A exceeds the limit value, so 1 is added to the abnormal vibration count T (S11). After the addition in S11, it is determined whether or not the abnormal vibration count value T is abnormal in its set value (S12). If the determination in S12 is Yes, it is determined that the number of occurrences of abnormal vibration is unacceptable, and drum rotation stop processing is performed (S23). It is determined whether the drum rotation speed has decreased to a rotation speed lower than 5 rpm (S24). If the determination in S24 is No, the drum stop process in S23 is continued, and if the determination in S24 is Yes, it is indicated that the number of times that abnormal vibration has not been allowed by the notification means such as the buzzer 103 has been reached by the user. (S25).

  If the determination in S12 is No, it is determined that the number of occurrences of abnormal vibration has not yet reached an unacceptable number, the time measurement is interrupted (S26), and a drum rotation stop process is performed (S27). . It is determined whether or not the drum rotation speed has decreased to a rotation speed lower than 5 rpm (S28). If the determination in S28 is No, the drum stop process in S27 is continued, and if the determination in S28 is Yes, the time measurement is resumed (S29), the process returns to S6, and the drum rotation is increased.

  If the determination in S10 as to whether or not the amplitude value A exceeds the limit value is No, a process for reducing the rotation speed of the drum is performed (S13), and the process returns to the measurement of the rotation speed R of the drum 3 (S7). Are processed.

  If the determination (S9) whether or not the amplitude value A is larger than the reference value is No, that is, if the amplitude value A is smaller than the reference value stored in advance in the storage means, the amplitude value A is stored in advance in the storage means. It is determined whether or not the value is the same as the reference value stored in (S14). If the determination in S14 is Yes, the drum rotation speed is maintained. That is, when the amplitude value A is equal to the reference value, there is a possibility that the amplitude does not expand in the subsequent dehydrating action. Accordingly, a measure is taken to maintain the drum rotation speed at the current rotation speed and look for a while, and the process returns to the measurement of the drum rotation speed R (S7).

  If the determination (S14) of whether or not the amplitude value A is the same as the reference value is No, that is, if the amplitude value A is less than the reference value, the dehydration process may be continued. Then, it is determined whether or not the measurement time exceeds the set time (S16). If the determination in S16 is Yes, that is, if the measurement time exceeds the set time, it means that the dehydration process has been completed, and therefore processing for stopping the rotation of the drum 3 is performed (S17). It is determined whether or not the rotation speed R of the drum 3 has decreased to less than 5 rpm (S18). If the rotation speed R has not decreased to less than 5 rpm in the determination of S18, the process returns to S17 and the rotation stop processing of the drum 3 is continued. If the rotation speed R of the drum 3 is reduced to less than 5 rpm in the determination of S18, the dehydration end process is performed (S19).

  If the determination (S16) of whether or not the measurement time in the dehydration process exceeds the set time is No, that is, if the dehydration process should be continued, the rotational speed R of the drum 3 is less than the upper limit rotational speed. It is determined whether or not there is (S20). If the determination in S20 is Yes, that is, if there is room for an increase in the rotational speed R of the drum 3, the process returns to S6 and the rotational speed R of the drum 3 is increased. If the determination in S20 is No, there is no room for increase in the rotation speed R of the drum 3, so the process proceeds to S15 and the rotation speed R of the drum 3 is maintained.

  FIG. 6 is a graph showing an example of a reference value of vibration according to the number of rotations of the drum for each capacity of the laundry. As illustrated, the capacity of the laundry is divided into, for example, a small capacity of 3 kg or less, a medium capacity of 3 kg to 6 kg, and a large capacity of 6 kg or more. In the reference value setting example shown in the figure, the reference value is set to the largest value over the range of all the rotation speeds in the case of a medium-volume laundry. This is because the medium-capacity laundry in the drum 3 is most likely to be unbalanced, and if the drum 3 is not allowed to swing to some extent, the drum 3 frequently stops rotating. If the reference value is set to a large value, the drum 3 continues to rotate without being stopped by vibrations below that of the outer box, and the imbalance may be eliminated while the drum 3 is rotating. The reason why the reference value decreases as the rotational speed increases is that there is a concern about damage or failure when the vibration of the outer case increases at high speed.

  In the case of a large-capacity laundry, there is a circumstance that the bias of the laundry put into the drum 3 hardly occurs. Since the laundry in the drum 3 sticks with little unbalance, it is expected that the swing of the drum 3 is small. Therefore, the reference value is set to the smallest value over all the rotation speed ranges. The reason why the reference value decreases as the rotational speed increases is the same as in the case of a medium-volume laundry. In the case of a small capacity, the reference value is set to an intermediate value between a medium capacity and a large capacity.

  Since the vibration detecting means 110 is specifically an acceleration sensor, generally, the detected value of vibration of the outer case 1 is an electric signal (voltage value), and the set reference value is also a voltage value. As the vibration detection means 110, means other than electrical detection means, for example, optical, electromagnetic, mechanical detection means may be considered. In the case of these output values, the reference value in FIG. 6 may be expressed as a physical value of the output after being converted into a voltage value, or may be expressed after being converted into a voltage value.

  FIG. 7 is a graph showing an example of a vibration reference value according to the number of rotations of the drum for each washing course. As the washing course, a course according to the type of laundry, the degree of dirt, the operating environment of the washing machine, and the like can be considered. In the illustrated example, a standard course, a blanket course, and a night course are listed. The blanket course is easy to contain moisture and tends to be unbalanced. However, since it is necessary to continue operation even if the drum rotates slightly, the setting corresponds to the medium capacity in FIG. ing. In the night course, since the washing machine is operated at night, the reference value for the vibration of the outer box is set small in consideration of the surrounding environment. The standard course is set to a reference value intermediate between the two courses.

It is side surface sectional drawing which shows an example of the washing machine by this invention. It is a top sectional view of the washing machine shown in FIG. It is a figure which shows an example of the display and operation part used for the washing machine shown in FIG. It is a block diagram which shows an example of the control circuit of the washing machine by this invention. It is a flowchart which shows an example of the rotational drive control of the drum by the control means of the washing machine by this invention. It is a graph which shows an example of the standard value of vibration according to the number of rotations of a drum according to the capacity of laundry. It is a graph which shows an example of the standard value of vibration according to the number of rotations of a drum for every washing course.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer box 2 Water tank 3 Drum 4 Small hole 6 Anti-vibration damper 7 Drain duct 8 Door 9 Door packing 10 Drive motor 11 Drain pump 14 Water supply port 17 Baffle 18 Water supply valve 19 Operation / display unit 19a Power on / off switch 19b Start / Pause switch 19c Course changeover switch 19d Notification buzzer switch 19e Washing switch 19f Drying switch 19g Washing switch 19h Rinse switch 19i Dehydration switch 20 Control circuit 21 Detergent case 22 Microcomputer 23 CPU 24 RAM
25 ROM 26 Timer 27 System bus 28 I / 0 port 29 Control unit 30 Calculation unit 31 Power supply circuit 32 Reset circuit 33 Input key circuit 34 State detection circuit 35 Display device drive circuit 36 Buzzer drive circuit 37 Load drive circuit 101 Input setting means 102 Display device 103 Buzzer 105 Rotation detection means 107 Fluid balancer 110 Vibration detection means (acceleration sensor) 111 Storage means 112 Comparison means A Amplitude value G Floor surface R Rotational speed T Abnormal vibration count value

Claims (9)

  An outer box, an outer tub elastically supported by the outer box, a drum that is rotatably supported by the outer tub and can store laundry, a rotation driving means for the drum, a vibration detection means for detecting vibration of the outer box, A rotation detecting means for detecting the rotation speed of the drum, a storage means for storing a reference value set according to the rotation speed of the drum with respect to the vibration of the outer box, and a rotation speed of the drum detected by the rotation detection means. Comparing means for comparing a vibration detection signal from the vibration detecting means with a reference value stored in the storage means, and a control means for controlling the rotation driving means based on a comparison result of the comparing means. Washing machine consisting of.   A capacity detection means for detecting the capacity of the laundry is provided, and the reference value stored in the storage means is set in accordance with the number of revolutions of the drum for each capacity category. The washing machine according to Item 1.   When the vibration value of the outer box detected by the vibration detection means is larger than the reference value stored in the storage means in the number of rotations of the drum at the time of detection, the control means The washing machine according to claim 1 or 2, wherein the rotation driving means is controlled so that the rotation of the drum is on a safe side.   When the value of the vibration of the outer box detected by the vibration detection means is equal to the reference value stored in the storage means at the number of rotations of the drum at the time of detection, the control means The washing machine according to claim 1 or 2, wherein the rotation driving means is controlled in such a manner that the rotation of the drum is not changed.   When the value of the vibration of the outer box detected by the vibration detection means is smaller than the reference value stored in the storage means at the number of rotations of the drum at the time of detection, the control means The washing machine according to claim 1 or 2, comprising controlling the rotation driving means in a manner of increasing the rotation of the drum.   The washing machine according to claim 1 or 2, further comprising input setting means for setting the reference value stored in the storage means to be changeable.   Informing means for informing the user, and when the vibration detecting means detects one or more vibrations of the outer box equal to or greater than a predetermined limit value, the control means informs the notifying means. The washing machine according to claim 1 or 2, comprising:   The washing machine according to claim 1 or 2, further comprising display means for displaying a vibration value of the outer box detected by the vibration detection means.   The storage unit includes a selection unit that selects a driving course according to the type of the laundry, and the storage unit sets the reference value for the vibration of the outer box according to the number of rotations of the drum for each driving course. The washing machine according to claim 1 or 2, comprising:

Images