JP2014144068A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of realizing a stable rotation of a rotary tub and a water-supply operation when supplying water in a preceding process of washing.SOLUTION: The washing machine include a control means for controlling a washing operation including washing by a rotation of an agitator and dewatering by a rotation of a rotary tub, the control means performs a tub-rotation and water-supply control for supplying water in the rotary tub by a water-supply means when supplying water in a preceding process of the washing while rotating the rotary tub. The control means changes control modes in the tub-rotation and water-supply control when a value relating to variation of a water tub detected with a variation detection means is a prescribed threshold value or above.

Description

  The present embodiment relates to a washing machine.

  For example, in a vertical washing machine in which the axial direction of the water tub and the rotating tub is directed vertically, the water tub that can store water is elastically supported in the outer box, and the rotating tub that is a washing tub and dewatering tub rotates in the water tub. It is provided as possible. Moreover, the water supply apparatus provided in the outer box performs the water supply operation | movement which drops and supplies water to the inside of a rotation tank. At this time, the water supplied from the water supply device is directly applied to a part of the laundry in the rotating tub and cannot be uniformly poured into the laundry. For this reason, in the part where water is not directly applied in the laundry, the penetration of water is slow, and the penetration of the detergent solution is also slow, so that the desired cleaning effect may not be obtained.

Then, in order to inject water into the laundry extensively, it is conceivable to rotate the rotating tub while supplying water with a water supply device. According to this, water can permeate the laundry more quickly and more widely.
In the above configuration, unlike the conventional case where only the water supply operation is performed alone, the rotating tub is rotated together, so that a new problem occurs in performing the water supply operation such as vibration generated in the water tub with the rotation. Is inherent.

JP 2000-237487 A

  Thus, a washing machine is provided that can achieve stable rotation of the rotating tub and water supply operation during water supply before washing.

  The washing machine of the present embodiment includes a water tank elastically supported in an outer box, a rotation tank that has a dewatering hole and is rotatably provided in the water tank, and stores laundry therein, and the rotation tank A stirrer that is rotatably provided inside and agitates the laundry by the rotation, a water supply means that is provided in the outer box and supplies water into the rotating tub, and detects vibration generated in the water tub. Control means for controlling a washing operation including vibration detection means, washing by rotation of the agitator and dehydration by rotation of the rotating tank, and at the time of water supply before the washing, by the water supply means, the rotating tank Control means for executing tank rotation water supply control for rotating the rotating tank while supplying water therein, and the control means has a value relating to the vibration of the water tank detected by the vibration detection means equal to or greater than a predetermined threshold value. When the tank rotation water supply control To change the that control aspect.

The flowchart which shows an example of the tank rotation water supply control of 1st Embodiment. Broken side view showing a schematic configuration of the entire washing machine Rear view Block diagram showing electrical configuration The figure which shows an example of the threshold value table which matched the amount of laundry and the threshold value Flow chart showing control contents related to washing in washing operation Explanatory drawing of the control aspect in tank rotation water supply control FIG. 1 equivalent view showing the second embodiment FIG. 1 equivalent diagram showing the third embodiment FIG. 1 equivalent diagram showing the fourth embodiment The flowchart which shows 5th Embodiment and shows a part of example of a change of the control aspect of tank rotation water supply control. FIG. 5 equivalent view showing the sixth embodiment FIG. 1 equivalent diagram showing a seventh embodiment FIG. 8 equivalent diagram showing the eighth embodiment FIG. 9 equivalent diagram showing the ninth embodiment FIG. 10 equivalent diagram showing the tenth embodiment. FIG. 11 equivalent diagram showing the eleventh embodiment

<First Embodiment>
Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 7. As shown in FIG. 2, in a vertical washing machine (hereinafter simply referred to as a washing machine), the outer casing of the washing machine body 1 is provided in a rectangular box-like outer box 2 and a bottom portion of the outer box 2. The base plate 3 and the top cover 4 mounted on the upper part of the outer box 2 are provided. A tank 5 is accommodated inside the outer box 2. In this case, the tank 5 is composed of a water tank 6 having a bottomed cylindrical shape, and a rotating tank 7 that is also a bottomed cylindrical shape and is rotatably disposed in the water tank 6. .
Among these, the water tank 6 is supported in a suspended manner in a vertical axis state in which the axial direction is the vertical direction by an elastic support mechanism 8 mainly including a suspension bar 8a and a spring 8b. A water tank cover 9 is attached to the upper part of the water tank 6, and an inner lid 10 is provided at a substantially central part of the water tank cover 9 so as to be openable and closable.

  The rotary tank 7 has a small hole 7a for dehydration and ventilation on the peripheral side wall, and is rotatable around the vertical axis. The laundry is accommodated in the rotating tub 7 so that it can be taken in and out. A liquid-filled rotary balancer 11 is attached to the upper end opening of the rotary tank 7. A stirring body 12 is rotatably disposed at the bottom of the rotary tank 7. A drive mechanism 14 mainly including a washing machine motor 13 is disposed below the bottom of the water tub 6. The drive mechanism 14 has a stirring shaft 14a and a hollow dewatering shaft 14b through which the stirring shaft 14a is inserted. The central portion of the stirring body 12 is connected to the stirring shaft 14a, and the bottom of the rotary tank 7 is connected to the dewatering shaft 14b. The central part of is connected.

  The washing machine motor 13 is constituted by an outer rotor type brushless motor, and the rotor 13 a is directly connected to the stirring shaft 14 a of the drive mechanism 14. The drive mechanism 14 applies a braking force to a clutch (not shown) including a spring clutch that connects and disconnects the rotor 13a of the washing machine motor 13 to and from the dewatering shaft 14b (rotating tub 7), and the dewatering shaft 14b. And a brake (not shown) including a band brake to be released, and an electromagnetic device 15 (see FIG. 4) as a drive source thereof.

  The electromagnetic device 15 causes the clutch to be inoperative (off) and disconnect the rotor 13a from the dehydrating shaft 14b and operate the brake (on) to apply the braking force to the dewatering shaft 14b when the power disconnection is inoperative. To restrain the rotation of the rotary tank 7. On the other hand, at the time of energization operation, the electromagnetic device 15 operates the clutch to connect the rotor 13a to the dewatering shaft 14b and transmit the rotation of the rotor 13a to the dewatering shaft 14b, and also deactivates the brake to dehydrate. The brake force for the shaft 14b is released.

  A drain port 6 a is provided at the bottom of the water tank 6, and this drain port 6 a is connected to a drain pipe 17 via a drain valve 16. Further, an air trap 18 for detecting a water level is provided at a portion communicating with the drain outlet 6 a at the bottom of the water tank 6, and one end of an air tube 19 is connected to the air trap 18. The other end of the air tube 19 is connected to a water level sensor 20 described later.

  The top cover 4 is positioned above the inner lid 10 and has a laundry doorway (not shown), and has a rectangular frame shape. The laundry doorway is opened and closed by a foldable outer lid 22. An operation panel 23 is provided on the front portion (left side in FIG. 2) of the top cover 4. The operation panel 23 is provided with an operation display unit 24 (see FIG. 4) having an operation unit composed of various switches and a display unit for performing various displays. A control device 25 (see FIG. 4) is arranged as a means.

As shown in FIG. 2, a component storage portion 26 is provided at the rear portion of the top cover 4. In the component storage unit 26, the water level sensor 20 described above is disposed, and a water supply device 27 is disposed. The water supply device 27 is a water supply means for supplying water supplied from a water supply source such as a water supply into the rotary tub 7, and includes a water supply valve 28 (see FIG. 4), a water supply case 29, a water supply pipe 30, and the like.
Although not shown in detail, in the water supply valve 28 fixed in the water supply case 29, the hose connection port portion 28a protrudes upward from the upper surface of the component storage unit 26 and is connected to a water tap through a water supply hose (not shown). The discharge port portion (not shown) of the water supply valve 28 faces the water supply case 29. A water supply port portion 29 a provided at the front lower end portion of the water supply case 29 is connected to one end portion of the water supply tube 30, and the other end portion of the water supply tube 30 is connected to a water supply port 31 provided in the water tank cover 9. Has been.

  Here, when the water supply valve 28 is opened, tap water is supplied from the discharge port portion of the water supply valve 28 into the water supply case 29, and the water is supplied to the water supply port portion 29 a, the water supply pipe 30 and the water supply port 31. And is supplied into the rotary tank 7. In this case, when the rotating tub 7 is stopped rotating, the water that is dropped and supplied from the water supply port 31 into the rotating tub 7 is located on the side wall side of the rotating tub 7 in the laundry put into the rotating tub 7. Get down to one place in the surrounding area.

  A circulation water channel 32 extending in the vertical direction is provided on the inner wall surface of the rotating tub 7. The cover member 33 that constitutes the main part of the circulating water channel 32 is formed in a shape that is long in the vertical direction with a synthetic resin, and is attached to the inner wall surface of the rotating tub 7. A detergent charging port 34 is provided on the upper portion of the cover member 33, and a charging cover 35 for opening and closing the detergent charging port 34 is provided. An outlet (not shown) that opens to the lower space of the stirring body 12 is provided at the lower end portion of the cover member 33. A lint filter (not shown) is accommodated in the cover member 33, and a detergent guide path (not shown) is provided on both the left and right sides of the lint filter. The detergent introduced into the detergent introduction port 34 passes through the detergent guide path and is introduced into the bottom of the rotary tank 7 from the outlet.

  Now, the washing machine of this embodiment is provided with the vibration detection means which detects the vibration which generate | occur | produces in the water tank 6, and changes the control aspect of the tank rotation water supply control mentioned later based on the detection information. Hereinafter, the configuration relating to the vibration detecting means will be described with reference to FIG.

  The vibration detecting means is constituted by, for example, an acceleration sensor 37, and a board mounting portion 38 of a printed board 39 on which the acceleration sensor 37 is mounted is disposed in the water tank 6. As shown in FIG. 3, the substrate mounting portion 38 is located at the upper rear side of the outer surface of the water tank 6 and is provided so as to protrude outward in the radial direction of the water tank 6 in a rectangular tube shape. The printed circuit board 39 is accommodated and fixed to the substrate mounting portion 38 so as to face the outer surface of the water tank 6 and to be parallel to the axes of the shafts 14a and 14b. A flange member 41 is provided on the outer surface of the water tank 6 to surround the upper side of the substrate mounting portion 38. This flange member 41 protrudes outward in the radial direction of the water tank 6 from the board mounting portion 38 and covers the upper side of the printed board 39 to prevent water from entering the printed board 39 and the acceleration sensor 37 side. .

  The acceleration sensor 37 is composed of, for example, a strain resistance type or a capacitance type, and is mounted on the printed circuit board 39 together with a processing circuit (for example, an amplification circuit or an A / D conversion processing circuit not shown). The acceleration sensor 37 outputs a signal corresponding to at least acceleration in one direction. In this case, the acceleration sensor 37 is connected to the control device 25 by a wiring 40 extending downward from the printed circuit board 39, and gives information related to the vibration of the water tank 6 to the control device 25.

  In a storage unit 46 (see FIG. 4) of the control device 25 described later, a predetermined threshold value K is stored in advance with respect to detection information (for example, a signal corresponding to the magnitude of the acceleration) related to the vibration of the water tank 6. The threshold value K is defined in association with, for example, the weight of laundry stored in the rotating tub 7 (the amount of laundry). Specifically, as illustrated in FIG. 5, with respect to the amount of laundry “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”, “6 kg or more” The threshold values K1 to K5 are defined by the threshold value table set to “30”, “60”, “100”, “160”, “200”. That is, in the washing operation, when an unbalanced state occurs in which the laundry is biased in the circumferential direction of the rotating tub 7 and vibration is detected by the acceleration sensor 37, the degree of vibration of the water tub 6 varies depending on the amount of laundry. The less it is, the more it shakes. Therefore, with respect to the detected value of the acceleration sensor 37, the threshold value K (reference value) for determining that the degree of vibration of the aquarium 6 is large is set as the laundry amount, such that the relatively small threshold value K1 is set for a small amount of laundry as described above. By setting accordingly, the degree of vibration can be accurately determined.

  The acceleration sensor 37 described above is not limited to acceleration in one direction, but is shown in the arrow direction shown in FIG. 3, that is, the vertical direction (the central axis direction of the water tank 6) and the horizontal direction (the tangential direction of the outer periphery of the water tank 6). These may have two detection axes, and may further have three detection axes combined with the radial direction with respect to the central axis of the water tank 6.

  FIG. 4 shows an outline of the electrical configuration of the washing machine. The control device 25 is mainly composed of a microcomputer and controls the overall operation of the washing machine. In addition to the detection information (detection signal) from the acceleration sensor 37 described above, the control device 25 includes a water level sensor that detects the operation signal of the operation display unit 24 of the operation panel 23 and the water level of water stored in the water tank 6. The water level detection signal 20, the rotation speed detection signal of the rotation sensor 47 that detects the rotation speed of the washing machine motor 13, and the current detection signal of the current sensor 48 that detects the current flowing through the washing machine motor 13 are input. As will be described later, the current sensor 48 and the control device 25 are configured as laundry amount detection means, and are configured to detect the amount of laundry.

  The control device 25 includes a storage unit 46 that includes, for example, a ROM, a RAM, an EEPROM, and the like. The storage unit 46 stores a control program for the washing operation and the threshold table as information on the control conditions. The control device 25 controls the water supply valve 28, the drain valve 16, the washing machine motor 13, the electromagnetic device 15, and the like via the drive circuit 49 based on the input signal and the control program. The drive circuit 49 includes an inverter circuit for driving the washing machine motor 13, and the control device 25 performs PWM control of the washing machine motor 13 based on the rotation speed detection signal of the rotation sensor 47.

Next, the operation of the above configuration will be described.
The user puts the laundry into the rotating tub 7 and selects a desired mode of washing operation by an input operation of the operation display unit 24 on the operation panel 23. Then, when the start key of the operation display unit 24 is operated, the control device 25 automatically executes the washing, rinsing and dewatering steps sequentially for the selected washing operation based on the operation signal and the control program. To do. This washing operation will be described with reference to the flowcharts of FIGS. 1 and 6 with regard to washing in this embodiment, in particular, control during water supply before washing.

  First, in step S1 of FIG. 6, the control device 25 measures the amount of laundry. In this case, for example, the amount of laundry is measured by rotating the stirring body 12 by the washing machine motor 13 and detecting the current value flowing through the washing machine motor 13 by the current sensor 48 at that time. In the measurement of the amount of laundry, the electromagnetic device 15 of the drive mechanism 14 is disconnected and deactivated, the clutch is turned off, the brake is turned on, and the rotating tub 7 is restrained so as not to rotate.

  Next, the control device 25 sets the water level based on the magnitude of the current value measurement result by the current sensor 48 (step S2). The load as the amount of laundry put into the rotating tub 7 includes various states from a low load corresponding to “less than 1 kg” in FIG. 5 to a high load having a rated capacity corresponding to “6 kg or more”. For example, the control device 25 sets the water level in one of the categories “lowest water level”, “low water level”, “medium water level”, and “high water level” corresponding to the low load to the high load. Moreover, the control apparatus 25 collates a threshold value table, and sets the threshold value K corresponding to the classification | category of "less than 1 kg"-"6 kg or more" based on the measurement result of said laundry quantity.

  It is assumed that a high load is measured in step S1, the water level is set to “high water level”, and the threshold value K is set to “200” (K5) in step S2. In this case, the control device 25 displays the amount of detergent corresponding to the “high water level” on the display unit of the operation display unit 24 for a certain period of time (step S3). When the user looks at the amount of detergent displayed on the display unit and puts the displayed amount of detergent into the detergent inlet 34 of the circulation channel 32, the introduced detergent passes through the detergent guide path and from the outlet. It is thrown into the bottom of the rotating tank 7. And the control apparatus 25 performs the tank rotation water supply control which rotates the rotation tank 7, supplying water in the rotation tank 7 with the water supply apparatus 27 (refer step S4 and FIG. 1).

  Specifically, in step S11 of FIG. 1, the control device 25 opens the water supply valve 28 by energization to start water supply into the rotating tub 7 by the water supply device 27 and energizes the electromagnetic device 15 to operate. , Turn on the clutch, and turn off the brake. Thereby, the rotation tank 7 becomes rotatable. Further, the control device 25 starts energizing the washing machine motor 13 (see time t0 in FIG. 7), rotates the rotating tub 7 in one direction (+ direction), and the rotation speed is a target rotation number. The pressure is increased to 150 rpm (step S12).

  Here, as shown in FIG. 7, when the control device 25 reaches the target rotational speed (time t <b> 3), the control device 25 controls the rotational speed of the rotating tub 7 to be substantially constant. Further, the control device 25 is configured to detect the vibration of the water tank 6 by the acceleration sensor 37 during the rotation of the rotary tank 7 (step S13), and the detection value of the acceleration sensor 37 is set in the step S2. It is determined whether the value is equal to or greater than the threshold value K5 (step S14).

  As illustrated in FIG. 7, it is assumed that the detected value of the acceleration sensor 37 is equal to or higher than the threshold value K5 (YES in step S14) while the rotation speed of the rotating tub 7 is increasing (time t1). In this case, in order to switch the target rotational speed to 20 rpm, the control device 25 cuts off the electric power of the washing machine motor 13 and causes the rotating tub 7 to rotate in an inertial manner, thereby reducing the rotational speed. As a result, when the rotation speed of the rotating tub 7 reaches 20 rpm (time t2), the control device 25 finishes the inertia rotation and controls it to be substantially constant so as to maintain the rotation speed of 20 rpm (step S15). .

  Thereafter, when a predetermined time (for example, 45 seconds (")) elapses from the start time t0 (time t4, YES in step S16), the control device 25 disconnects the washing machine motor 13 and disconnects the electromagnetic device 15 by disconnecting power. The operation is stopped, the clutch is turned off, and the brake is turned on (step S17), whereby the rotating tub 7 is stopped by the braking force being applied, and in step S17, the control device 25 causes the water supply valve 28 to stop. Is closed by power disconnection, and water supply into the rotating tub 7 by the water supply device 27 is stopped.

  On the other hand, when the detected value of the acceleration sensor 37 does not take a value greater than or equal to the threshold value K5 during the rotation of the rotary tank 7 (NO in step S14), the rotation speed is the initial target rotation speed (for example, 150 rpm). Is maintained (step S12). Then, at time t4 (YES in step S18), as described above, the brake relating to the washing machine motor 13 is turned on, and water supply into the rotating tub 7 by the water supply device 27 is stopped (step S17).

  When the tank rotation water supply control is thus completed, the process returns to step S5 in FIG. When it is determined that the water supply in the tank rotation water supply control is less than the water level set in step S2 (NO in step S5), the control device 25 restarts the water supply stopped in step S17, or water supply By continuing without stopping, water is supplied to the set water level (step S6). In the washing in step S7, the control device 25 cuts off the electromagnetic device 15 and deactivates it, turns off the clutch, and turns on the brake. Then, the washing machine motor 13 is rotated forward and reverse alternately at a low speed (for example, 50 to 60 rpm) to drive the stirrer 12 to perform washing. This washing is finished when the washing machine motor 13 is stopped when the washing is performed for a set time.

The above steps S1 to S7 are the washing process, and steps S1 to S6 are the water supply before the washing in the washing process.
By the way, unlike this embodiment, when the water supply of the front stage of washing is performed in a state where the rotating tub 7 is stopped, the water dropped from the water supply port 31 of the water supply device 27 is the laundry in the rotating tub 7. Since it falls on one place of the surrounding part located in the side wall side of the rotation tank 7, the water cannot be uniformly poured into the laundry.

  On the other hand, in the tank rotation water supply control in step S4, since the rotation tank 7 is rotated while water is supplied by the water supply device 27, water can be poured over a wide range into the laundry in the rotation tank 7. At this time, as indicated by a solid line in FIG. 7, the target rotational speed is set to an upper limit of 150 rpm that can prevent water splashing outside the rotating tank 7 due to the rotation of the rotating tank 7. For this reason, the laundry in the rotating tub 7 is moved to the side wall side using centrifugal force, and the laundry in the central portion of the rotating tub 7 is relatively sunk. So that water can rapidly penetrate the entire laundry. Accordingly, the detergent liquid is sufficiently permeated into the laundry, and the washing effect in washing can be enhanced.

  In this respect, in the tank rotation water supply control, for example, even if an unbalanced state occurs in which the laundry is biased in the circumferential direction of the rotation tank 7, the rotation of the rotation tank 7 is switched to a low speed based on the detection value of the acceleration sensor 37 ( Step S15). The number of rotations in this case is preferably 20 rpm, which does not generate noise associated with the rotation of the rotating tank 7 and reduces the vibration of the water tank 6 and can be controlled stably (see the broken line in FIG. 7). Further, the time 45 seconds between time t0 and time t4 is a time sufficient to wet the laundry with water even when the rotating tub 7 is rotated at 20 rpm. Furthermore, when the rotation mode of the tank rotation water supply control is changed by switching the rotation of the rotation tank 7 to the low speed, the washing machine motor 13 is disconnected and the rotation tank 7 is rotated by inertia. It can save energy by reducing the power consumption more than necessary.

  As described above, the control device 25 of the present embodiment performs the tank rotation water supply control for rotating the rotating tub 7 while supplying water into the rotating tub 7 by the water supply device 27 at the time of water supply before washing in the washing process of the washing operation. When the value relating to the vibration of the water tank 6 detected by the vibration detection means is equal to or greater than a predetermined threshold K, the control mode in the tank rotation water supply control is changed.

  According to this, at the time of water supply before washing, water can be poured over a wide range into the laundry in the rotating tub 7 by the rotation of the rotating tub 7. Moreover, in the said structure, since the control aspect of tank rotation water supply control is changed when the value which concerns on the vibration of the water tank 6 is more than the predetermined threshold K, the vibration and noise of the water tank 6 are suppressed, and the stable rotation tank 7 Rotation and water supply operation can be performed.

  In the tank rotation water supply control, the control device 25 changes the control mode so as to decrease the rotation speed of the rotation tank 7 when the value related to the vibration of the water tank 6 is equal to or greater than a predetermined threshold value K. According to this, in tank rotation water supply control, the vibration and noise of the water tank 6 accompanying rotation of the rotation tank 7 can be suppressed reliably, and a more stable operation can be executed. In particular, even when the amount of laundry is relatively large, the rotating tub 7 loses its balance due to the high-speed rotation of the rotating tub 7 where the high weight and the weight of the supplied washing water act, and the washing machine The fear that the main body 1 moves can be eliminated.

  Moreover, the control apparatus 25 sets the threshold values K1-K5 according to the amount of laundry as the said predetermined threshold K based on the detection result of the laundry amount detection means. In the unbalanced state described above, the smaller the amount of laundry, the greater the shaking of the water tank 6 than when the amount of laundry is large. Therefore, by setting the threshold values K1 to K5 according to the amount of laundry, the degree of vibration of the aquarium 6 can be accurately determined even when the amount of laundry is different, and vibration and noise of the aquarium 6 can be more reliably suppressed. Can do.

<About other embodiments>
8 to 17 show the second to eleventh embodiments. The same parts as those already described are denoted by the same reference numerals and the description thereof will be omitted, and different points will be described below. In addition, regarding the operating state of the electromagnetic device 15 (on / off of the clutch and brake), the relationship with the rotating tub 7 and the agitator 12 is as described above, so the description of the clutch is omitted and the water supply device by energizing the water supply valve 28 is provided. The description of the water supply 27 will be simplified as appropriate, for example, simply as “water supply operation by the water supply device 27”.

Second Embodiment
In the flowchart of the second embodiment shown in FIG. 8, in steps S21 to S24, as in steps S11 to S14 of the first embodiment, the water supply operation by the water supply device 27 and the rotation of the rotating tub 7 at 150 rpm and the acceleration sensor The detection of the vibration by 37 is performed.
Here, for example, when the detection value of the acceleration sensor 37 is equal to or higher than the threshold value K (YES in step S24) when the rotating tub 7 is rotating at 150 rpm, the control device 25 does not decrease the rotation number ( Step S25), the time for tank rotation water supply control is shortened. In other words, the water supply operation time of the water supply device 27 and the rotation time of the rotary tank 7 which are performed for 45 seconds from the start time t0 to the time t4 of the tank rotation water supply control are both changed to 25 seconds (step S26). As a result, when 25 seconds have elapsed from the start time t0 of the rotary water supply control (YES in step S26), the control device 25 stops the water supply operation of the water supply device 27 and applies the braking force to the rotary tank 7. The rotary tank 7 is stopped (step S27).

  On the other hand, if the detected value of the acceleration sensor 37 does not take a value equal to or greater than the threshold value K during rotation of the rotating tub 7 (NO in step S24), a predetermined water supply time (45 seconds) in the tank rotation water supply control is secured. (Step S28). Therefore, in this case, as in the first embodiment, when the time t4 has elapsed (YES in step S28), the water supply operation of the water supply device 27 is stopped, and the rotation of the rotary tank 7 is stopped to rotate the tank. Water supply control is complete | finished (step S27).

  As in the second embodiment described above, in the tank rotation water supply control, the control device 25 sets the control mode to be shorter than the predetermined water supply time when the value related to the vibration of the water tank 6 is equal to or greater than the predetermined threshold K. change. According to this, when the value relating to the vibration of the water tank 6 is equal to or greater than the threshold value K, the water supply operation time in the tank rotation water supply control, and hence the operation time in the unbalanced state described above, is shortened and stable tank rotation water supply control is performed. Can be executed.

<Third Embodiment>
In the flowchart of the third embodiment shown in FIG. 9, in steps S31 to S34 and step S36, the same processes as in steps S11 to S14 and step S18 of the first embodiment are executed.
However, if the detected value of the acceleration sensor 37 becomes equal to or greater than the threshold value K (YES in step S34) while the rotating tub 7 is rotating, the control device 25 immediately stops the water supply operation of the water supply device 27 and the rotating tub 7 The brake tank is applied to stop the rotating tub 7 (step S35). On the other hand, as long as the detection value of the acceleration sensor 37 does not take a value equal to or greater than the threshold value K during rotation of the rotating tub 7 (NO in step S34), a predetermined water supply time in the tank rotation water supply control is secured (step S36). ).

  The control apparatus 25 of 3rd Embodiment demonstrated above changes a control aspect so that the water supply by a water supply means may be stopped, when the value which concerns on the vibration of the water tank 6 is more than the predetermined threshold K in tank rotation water supply control. According to this, when the value relating to the vibration of the water tank 6 is equal to or greater than the threshold value K, the water supply operation in the tank rotation water supply control is terminated, and the operation in the unbalanced state is stopped, and will be described in a fifth embodiment described later. Thus, stable tank rotation water supply control can be performed.

<Fourth embodiment>
In the flowchart of the fourth embodiment shown in FIG. 10, in steps S40 to S43 and step S50, the same processes as those in steps S11 to S14 and step S18 of the first embodiment are executed.
However, if the detected value of the acceleration sensor 37 becomes equal to or greater than the threshold value K (YES in step S43) during the rotation of the rotating tub 7, the control device 25 immediately applies the brake force to the rotating tub 7 to cause the rotating tub 7 to rotate. 7 is stopped (step S44), while the water supply operation of the water supply device 27 is continued (step S45). In this case, the control device 25 determines based on the water level detection signal of the water level sensor 20 that the water level in the water tank 6, that is, the water level in the rotary tank 7 has reached a predetermined water level (for example, the lowest water level) (step). In S46, YES), the rotation of the rotating tub 7 is resumed (Step S47). When 45 seconds have elapsed from the start time t0 of the rotary water supply control (YES in step S48), the water supply operation of the water supply device 27 is stopped and the brake force is applied to the rotary tank 7 to stop the rotary tank 7 (Step S49).

  The predetermined water level may be a relatively low water level among the water levels defined by the washing machine. Further, while the rotation tank 7 is rotating, the rotation of the rotation tank 7 at 150 rpm in the tank rotation water supply control is interrupted unless the detection value of the acceleration sensor 37 takes a value equal to or greater than the threshold value K (NO in step S43). Without being continued until time t4 (step S50).

  In the tank rotation water supply control, the control device 25 according to the fourth embodiment described above stops the rotation of the rotation tank 7 and supplies the water by the water supply means when the value relating to the vibration of the water tank 6 is equal to or greater than the predetermined threshold K. After the water level in the rotary tank 7 reaches a predetermined water level, the control mode is changed so that the rotation of the rotary tank 7 is resumed. According to this, when the value relating to the vibration of the water tank 6 is equal to or greater than the threshold value K, the water is supplied in a state where the rotating tank 7 is stopped, and the water infiltrates the laundry in the rotating tank 7 by the water supply. , Laundry becomes heavy. For this reason, when the rotation of the rotating tub 7 is resumed, the vibration of the water tub 6 can be reduced as compared with the state before the rotation of the rotating tub 7 is stopped.

<Fifth Embodiment>
In the flowchart of 5th Embodiment shown in FIG. 11, step S51-S54 show the control content of the additional tank rotation water supply control and water supply operation which are performed instead of step S5 and S6 of 1st Embodiment.

  That is, as described in the first to fourth embodiments, when the value relating to the vibration of the water tank 6 is equal to or greater than the predetermined threshold value K, the rotational speed of the rotating tank 7 is decreased, or the water supply operation (and the rotating tank 7) is performed. Rotation), etc., processing for shortening the time is executed. Therefore, in order to complement the tank rotation water supply control, steps S51 and S52 are executed after execution of step S4 as a modified form of the control mode. Specifically, in the tank rotation water supply control, whether or not the detected value of the acceleration sensor 37 has become a value equal to or greater than the threshold value K in the tank rotation water supply control after the execution of any one of the steps S17, S27, S35. Is determined (step S51).

  If the detected value is equal to or greater than the threshold value K (YES in step S51), the agitator 12 is rotated in one direction by rotating the washing machine motor 13 at a low speed (for example, 15 rpm). (Step S52). Further, when the control device 25 determines that the water level in the water tank 6 (rotation tank 7) is less than the water level set in step S2 (NO in step S53), the water supply device 27 enters the rotation tank 7 into the rotation tank 7. Water supply is resumed (step S54). Thus, in the tank rotation water supply control, the rotation mode is changed from the rotation of the rotation tank 7 to the rotation of the stirring body 12 and the control mode is changed to supply water into the rotation tank 7 while rotating the stirring body 12. The stirring of the washing water facilitates the dissolution of the detergent in the washing water. When the water level set in step S2 is reached, the water supply valve 28 is closed due to power interruption, the water supply device 27 stops supplying water into the rotating tub 7, and the process proceeds to the washing in step S7 (return). . If the detected value does not take a value equal to or greater than the predetermined threshold value K and does not reach the set water level (NO in step S51 and NO in step S53), setting is performed as in step S6 of the first embodiment. Water supply up to the water level is performed without rotating the stirrer 12 (step S54).

  In the tank rotation water supply control, the control device 25 according to the fifth embodiment described above switches the rotation of the rotating tank 7 to the rotation of the stirring body 12 when the value relating to the vibration of the water tank 6 is equal to or greater than a predetermined threshold value K. The control mode is changed so that water is supplied into the rotary tank 7 while rotating the stirring body 12. According to this, when the value relating to the vibration of the water tub 6 is equal to or greater than the threshold value K, water can be supplied while correcting the bias of the laundry by the movement of the laundry in the rotating tub 7 by the rotation of the stirring body 12. In addition to being able to evenly pour water into the laundry, it is possible to agitate the washing water and further promote the dissolution of the detergent. Moreover, vibration and noise of the water tank 6 due to rotation of the rotating tank 7 can be prevented, and stable tank rotation water supply control can be executed.

<Sixth Embodiment>
FIG. 12 shows a threshold value table of the sixth embodiment. As illustrated in the figure, in the threshold value table of the sixth embodiment, as the predetermined threshold value, the threshold value K related to the signal corresponding to the magnitude of the acceleration in the tank rotation water supply control and vibrations exceeding the threshold value K are detected. And a threshold value K ′ of the number of times the image is processed.

  Specifically, in the threshold value table of the sixth embodiment, for example, “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”, “6 kg or more” , The threshold value K is set to a common value (200), while the threshold values K1 ′ to K5 ′ of the number of times are set to “2”, “2”, “3”, “3”, “4”, respectively. "Is set. That is, as described above, in the unbalanced state, the water tank 6 shakes more greatly as the amount of laundry is smaller. Therefore, the threshold value relating to the number of vibrations of the water tank 6 is set to a relatively small number of times of threshold value K1 ′ when the amount of laundry is small. By setting K ′ (reference value) according to the amount of laundry, the degree of vibration can be accurately determined.

  Further, the control device 25 counts the number of times that the detected value of the acceleration sensor 37 is equal to or greater than the threshold value K (200) in the tank rotation water supply control, stores the counted cumulative number in the RAM, and sets the number of times in the threshold table. By comparing with the threshold value K ′, the degree of vibration of the water tank 6 is determined.

  Therefore, even in the threshold value table of the sixth embodiment, the degree of vibration can be detected well even when the amount of laundry is different, similarly to the threshold value table of the first embodiment. 13 to 17 of the seventh to eleventh embodiments described below show specific examples for performing tank rotation water supply control based on the threshold value table of the sixth embodiment. Hereinafter, in step S2, the control device 25 collates the threshold value table based on the measurement result (for example, 6 kg or more) of the laundry amount, sets the threshold value K to “200”, and the threshold value K ′ for the number of times vibration is detected. Is assumed to be set to “4”.

<Seventh embodiment>
In the flowchart of the seventh embodiment shown in FIG. 13, steps (steps S71 to S73 and steps S75 to S78) other than step S74 are the same as steps S11 to S13 and steps S15 to S18 of the first embodiment of FIG. Processing is executed.

  That is, in step S74 in FIG. 13, the control device 25 determines whether or not the number of times that the detection value of the acceleration sensor 37 has reached the threshold value K (200) or more (the cumulative number) is four times or more, which is the threshold value K ′ of that number. Judge whether or not. Here, when it is determined that the cumulative number is 4 times or more (YES), the rotational speed of the rotating tub 7 is changed from 150 rpm to 20 rpm (step S75). On the other hand, in the tank rotation water supply control, the cumulative number does not exceed the threshold value K ′ and may be 1 to 3 times (NO in step S74). In such a case, the rotation speed of the rotating tub 7 is maintained at 150 rpm.

Unlike the seventh embodiment, for example, when the vibration of the threshold value K or more occurs for a short period of time while the rotational speed of the rotary tank 7 is increasing, it is unnecessary if the rotational speed of the rotary tank 7 is reduced to 20 rpm. In addition, the efficiency of the tank rotation water supply control (such as the degree of water penetration into the laundry) is reduced.
On the other hand, the control device 25 of the seventh embodiment changes the control mode so as to decrease the rotation speed of the rotating tub 7 based on the number of times that the vibration detection unit detects vibrations equal to or higher than the preset threshold value K. To do. For this reason, while being able to detect the vibration degree of the water tank 6 correctly, efficiency improvement of tank rotation water supply control can be achieved. Moreover, there exists an effect similar to 1st Embodiment, such as being able to perform stable tank rotation water supply control.

<Eighth Embodiment>
In the flowchart of the eighth embodiment shown in FIG. 14, steps (steps S81 to S83 and steps S85 to S88) other than step S84 are the same as steps S21 to S23 and steps S25 to S28 of the second embodiment of FIG. Processing is executed.

  That is, in step S84 of FIG. 14, the control device 25 determines that the number of times that the detected value of the acceleration sensor 37 is equal to or greater than the threshold value K is four times or more that is the threshold value K '(YES). Both the water supply operation time of the water supply device 27 performed for 45 seconds from the control start time t0 to the time t4 and the rotation time of the rotating tub 7 are changed to 25 seconds. (Step S86).

  Thus, the control apparatus 25 of 8th Embodiment changes a control aspect so that it may become shorter than predetermined water supply time based on the frequency | count of detecting the vibration more than the threshold value K preset by the vibration detection means. According to this, there exists an effect similar to 7th Embodiment and 2nd Embodiment, such as being able to perform stable control, aiming at the efficiency improvement of tank rotation water supply control.

<Ninth Embodiment>
In the flowchart of the ninth embodiment shown in FIG. 15, steps other than step S94 (steps S91 to S93 and steps S95 and S96) are the same as steps S31 to S33 and steps S35 and S36 of the third embodiment of FIG. Processing is executed.
That is, in step S94 in FIG. 15, when the control device 25 determines that the number of times the detected value of the acceleration sensor 37 is equal to or greater than the threshold value K is four times or more that is the threshold value K ′ (YES), the water supply device immediately In addition to stopping the water supply operation 27, the rotary tank 7 is stopped by applying the braking force to the rotary tank 7 (step S95).

  Thus, the control apparatus 25 of 9th Embodiment changes a control aspect so that the water supply by a water supply means may be stopped based on the frequency | count which detected the vibration more than the threshold value K preset by the vibration detection means. According to this, there exists an effect similar to 7th Embodiment and 3rd Embodiment, such as being able to perform stable control, aiming at the efficiency improvement of tank rotation water supply control.

<Tenth Embodiment>
In the flowchart of the tenth embodiment shown in FIG. 16, steps (steps S100 to S102 and steps S104 to S110) other than step S103 are the same as steps S40 to S42 and steps S44 to S50 of the fourth embodiment of FIG. Processing is executed.
That is, in step S103 in FIG. 16, when the control device 25 determines that the number of times the detected value of the acceleration sensor 37 is equal to or greater than the threshold value K is four times or more that is the threshold value K ′ (YES), the rotating tank immediately While applying the brake force to 7 to stop the rotating tub 7 (step S104), the water supply operation of the water supply device 27 is continued (step S105). In this case, when the control device 25 determines that the water level in the rotary tank 7 has reached the predetermined water level based on the water level detection signal of the water level sensor 20 (YES in step S106), the rotation of the rotary tank 7 is rotated. Is resumed (step S107).

  As described above, the control device 25 according to the tenth embodiment stops the rotation of the rotating tub 7 based on the number of times the vibration detection unit detects a vibration equal to or greater than the threshold value K set in advance, and the rotation is performed by water supply from the water supply unit. After the water level in the tank 7 reaches a predetermined water level, the control mode is changed so that the rotation of the rotating tank 7 is resumed. According to this, there exists an effect similar to 7th Embodiment and 4th Embodiment, such as being able to perform stable control, aiming at the efficiency improvement of tank rotation water supply control.

<Eleventh embodiment>
In the flowchart of the eleventh embodiment shown in FIG. 17, in steps S112 to S114 other than step S111, the same processing as steps S52 to S54 of the fifth embodiment of FIG. 11 is executed.

  That is, in the eleventh embodiment, steps S111 and S112 are executed after the execution of step S4 as a modified form of the control mode in order to complement the tank rotation water supply control of the seventh to tenth embodiments. . In this case, when the control device 25 determines in step S111 of FIG. 17 that the detected value of the acceleration sensor 37 is equal to or greater than the threshold value K, the threshold value K ′ is equal to or greater than 4 times (YES). The stirrer 12 is rotated by rotating the motor 13 at a low speed (step S112). Furthermore, when the control device 25 determines that the water level in the water tank 6 is less than the water level set in step S2 (NO in step S113), the water supply device 27 resumes water supply in the rotary tank 7 ( Step S114). Thus, in the tank rotation water supply control, the rotation mode is changed from the rotation of the rotation tank 7 to the rotation of the stirring body 12 and the control mode is changed to supply water into the rotation tank 7 while rotating the stirring body 12. The stirring of the washing water facilitates the dissolution of the detergent in the washing water.

  As described above, the control device 25 according to the eleventh embodiment switches from the rotation of the rotating tub 7 to the rotation of the stirrer 12 based on the number of times that the vibration detection unit detects a vibration greater than or equal to the threshold value K set in advance. The control mode is changed so that water is supplied into the rotary tub 7 while rotating 12. According to this, there exists an effect similar to 7th Embodiment and 5th Embodiment, such as being able to perform stable control, aiming at the efficiency improvement of tank rotation water supply control.

In the tank rotation water supply control described above, when the value relating to the vibration of the water tank 7 is equal to or greater than a predetermined threshold, the control mode is changed so that the rotation speed of the rotation tank 7 is reduced and shorter than the predetermined water supply time. Also good.
In step S7 described above, washing is performed by driving the stirrer 12, but during this washing, washing (tank rotation during washing) may be performed by driving the rotary tank 7. That is, for example, in the latter half of washing, the rotation of the stirring body 12 is switched to the rotation of the rotary tub 7, and the rotary tub 7 is driven by rotating the washing machine motor 13 alternately forward and reverse at a low speed. According to this, by utilizing the rotation of the rotating tub 7, a cleaning effect can be obtained with relatively little water, and water can be saved.

In addition, the threshold value tables shown in FIGS. 5 and 12 are not limited to the threshold values K and K ′, but can be set as appropriate according to the type and characteristics of the vibration detection means.
As mentioned above, although some embodiment of this invention was described, these embodiment is 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 body, 6 is a water tub, 7 is a rotating tub, 12 is an agitator, 13 is a washing machine motor, 25 is control means (laundry amount detection means), 27 is water supply means, and 37 is vibration detection means. , 48 indicate laundry amount detection means.

Claims (6)

A water tank elastically supported in the washing machine body;
A rotating tub that has a dewatering hole and is rotatably provided in the water tub, and stores laundry therein;
A stirrer that is rotatably provided in the rotating tub and stirs the laundry by the rotation,
A water supply means provided in the washing machine body, for supplying water into the rotating tub;
Vibration detecting means for detecting vibration generated in the water tank;
Control means for controlling a washing operation including washing by rotation of the stirring body and dehydration by rotation of the rotating tub, while supplying water into the rotating tub by the water supply means at the time of water supply before the washing Control means for executing tank rotation water supply control for rotating the rotating tank,
The said control means changes the control aspect in the said tank rotation water supply control, when the value which concerns on the vibration of the said water tank detected by the said vibration detection means is more than a predetermined threshold value.   The said control means changes the control mode so that the rotational speed of the said rotation tank may be reduced in the said tank rotation water supply control, when the value which concerns on the vibration of the said tank is more than a predetermined threshold value. 1. The washing machine according to 1.   In the tank rotation water supply control, when the value relating to the vibration of the water tank is equal to or greater than a predetermined threshold, the control means changes the control mode so that the water supply by the water supply means is stopped or shorter than a predetermined water supply time. The washing machine according to claim 1 or 2, characterized by the above.   In the tank rotation water supply control, when the value relating to the vibration of the water tank is equal to or greater than a predetermined threshold, the control means stops the rotation of the rotation tank, and the water level in the rotation tank is adjusted by water supply from the water supply means. The washing machine according to claim 1, wherein the control mode is changed so that the rotation of the rotary tub is resumed after reaching a predetermined water level.   In the tank rotation water supply control, when the value relating to the vibration of the water tank is equal to or greater than a predetermined threshold, the control means switches from rotation of the rotation tank to rotation of the stirring body and rotates the stirring body while rotating the stirring body. The washing machine according to claim 1, wherein the control mode is changed so that water is supplied into the tank. A laundry amount detecting means for detecting the laundry amount;
The washing machine according to any one of claims 1 to 5, wherein the control unit sets a threshold value corresponding to the laundry amount as the predetermined threshold value based on a detection result of the laundry amount detection unit. .

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