JP2013005960A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum-type washing machine that allows vibration of a drum to be minimized and allows balls within a ball balancer serving as a rotating body control device to be maintained as one group.SOLUTION: A drum-type washing machine is provided in which when second position detecting means 11 detects the position of a ball 9 by a light receiving/emitting element provided in a washing tub, and the unbalance position detected by first position detecting means 10 is located at the position opposite to the position of the ball 9 of the second position detecting means 11, the drum 3 is accelerated. Accordingly, when accelerating the rotation speed of the drum 3, it becomes possible to suppress occurrence of vibration of the drum 3 caused by ball 9 in a rotating body control device being overlapped with the deviated position of laundry.

Description

  The present invention relates to a drum that quickly eliminates an unbalanced state caused by washing clothes and the like being biased in the drum when the drum type washing machine provided with a rotating body control device (ball balancer) shifts from the washing process to the dewatering process. It relates to a washing machine.

  In the drum-type washing machine, in a state where wet clothes are accommodated in the drum, the clothes in the drum are unevenly distributed. For this reason, when it rotates at high speed around the horizontal axis, it becomes an unbalanced state, has a maximum resonance point from about 400 r / min after startup, and generates power consumption loss due to vibration, noise and vibration, It cannot be easily rotated at high speed.

  For this purpose, a rotating body control device (ball balancer) is provided. When the rotational speed of the drum reaches a rotational speed higher than the natural frequency of the drum, the ball in the ball balancer moves to a position opposite to the clothing bias. By utilizing this action, the ball balancer ball moves in the opposite direction to the bias of the clothes in the drum, thereby eliminating the unbalanced state.

  However, when the ball in the ball balancer moves, if the drum rotates at a low speed, it is located at the bottom of the ball balancer and does not move upward due to gravity. When the rotational speed of the drum reaches a constant rotational speed that adds rotational acceleration that exceeds the gravity of the ball, the ball moves upward. When the ball moves upward, at the position where gravity is applied to the ball, a plurality of balls move as a group, but since the gravity is not applied above the ball balancer, the plurality of balls will be divided into two parts. It does not become the state which cancels imbalance. Furthermore, a collision sound is generated in order to make a collision when the divided balls become a group again.

  In order to prevent the ball from being divided into two parts, the conventional drum-type washing machine is provided with a position detection means for detecting the position of the ball in the rotating body control device, so that the drum is placed before the ball reaches the upper part of the rotation control device. Acceleration prevents the ball from being divided into two parts (see, for example, Patent Document 1).

  As an example of a conventional drum type washing machine, the ball balancer described in Patent Document 1 will be described with reference to FIGS. FIG. 7 shows a configuration diagram of a conventional drum-type washing machine. FIG. 8 shows a control block diagram of a conventional drum type washing machine.

  As shown in FIG. 7, a washing tub 922 fixed to the washing machine main body is disposed in the housing 901. The washing tub 922 houses the drum 903, and a motor 912 that drives the drum 903 and a motor speed sensor 902 that detects the rotational speed of the motor 912 are located on the back of the washing tub 922. On the front surface of the drum 903, a balancing device (ball balancer) 908, a plurality of balls 909 that can be moved therein, and an optical sensor 911 that detects the positions of the plurality of balls 909 are provided. When the drum 903 starts to rotate and the optical sensor 911 detects that the plurality of balls 909 of the balancing device 908 have moved to arbitrary positions, the motor rotation controller 913 causes the motor 912 to accelerate the rotation speed of the drum 903. Take control. As a result, when the plurality of balls 909 exceed an arbitrary position, they are not divided into two, and the plurality of balls 909 are held as one group.

JP 2008-148996 A

  However, in the conventional configuration, when the unbalance position due to the bias of the laundry 918 in the drum 903 and the position of the ball 909 in the ball balancer 908 are in the same direction, the ball is positioned at a position detected by the optical sensor 911. Control is performed to accelerate the drum 903 even when is moving. As a result, since the unbalanced state due to the laundry 918 and the bias of the balls 909 overlap, the drum 903 is accelerated under the worst conditions. That is, the ball 909 is not divided into two, but has a problem that the vibration of the drum 903 is maximized.

  The present invention solves the above-described conventional problems, and provides a drum-type washing machine that can minimize drum vibration and maintain balls in a ball balancer as a rotating body control device as a group. The purpose is to provide.

  In order to solve the conventional problems, a drum-type washing machine according to the present invention includes a drum for storing laundry, a washing tub for storing the drum, a motor for driving the drum, and driving control of the motor. A first position detection for detecting an unbalanced position of the laundry when the motor is driven at a rotational speed at which the laundry is stuck in the drum; And a second position detecting means for detecting the position of the ball by a light emitting / receiving element provided in the washing tub, and the control unit detects the first position when the second position detecting means detects the ball. The drum is accelerated when the unbalanced position detected by the means is located at a position opposite to the ball position of the second position detecting means.

  Thereby, when accelerating the rotational speed of the drum, it is possible to suppress the occurrence of drum vibration due to the overlap of the position of the ball of the rotating body control device and the position of the bias of the laundry.

  Grasping the position of the laundry in the drum, and controlling the acceleration of the drum rotation speed with the laundry position and the ball balancer's multiple ball positions facing each other, suppresses drum vibration can do.

Configuration diagram of drum-type washing machine in Embodiment 1 of the present invention Control block diagram of the drum type washing machine The figure which shows the unbalanced state of the laundry in the rotational speed which the gravity and centrifugal force concerning the laundry of the drum type washing machine balance Current characteristics diagram of motor with unbalanced drum type washing machine (A) The figure which shows the unbalance position in which the electric current value of the drum type washing machine is a maximum electric current value (b) The figure which shows the unbalance position in which the electric current value of the drum type washing machine is the minimum electric current value (A) The figure which shows the state which the ball | bowl of the drum type washing machine reached | attained the 2nd position detection part (b) The schematic diagram of the 2nd position detection means of the drum type washing machine Configuration diagram of a conventional drum-type washing machine Control block diagram of a conventional drum type washing machine

A drum type washing machine according to a first aspect of the present invention includes a drum for storing laundry, a washing tub for storing the drum, a motor for driving the drum, a control unit for driving and controlling the motor, and a plurality of drums therein. A rotating body control device having a ball; first position detecting means for detecting an unbalanced position of the laundry when the motor is driven at a rotational speed at which the laundry is stuck in the drum; and provided in the washing tub Second position detecting means for detecting the position of the ball by a light emitting / receiving element, and the control unit detects the unbalanced position detected by the first position detecting means when the second position detecting means detects the ball. However, the drum is accelerated when it is located at a position opposite to the ball position of the second position detecting means.

  With such a configuration, when the ball of the rotating body control device reaches an arbitrary position, it is possible to suppress the occurrence of drum vibration caused by overlapping with the laundry bias position when the rotation speed of the drum is increased. .

  In the second invention, the second position detecting means of the first invention is provided in an upper part of the washing tub. Accordingly, the drum can be accelerated when the unbalanced position detected by the first position detecting means is positioned below the washing tub, so that the drum can be accelerated before the ball is divided into two.

  According to a third aspect of the invention, the first position detecting means of the first or second aspect of the invention includes a current detection unit that detects a fluctuation value and a fluctuation period of the current of the motor, and the laundry is placed in the drum. The unbalance position of the laundry is determined from the fluctuation value and the fluctuation cycle of the sticking rotation speed. For this reason, the 1st position detection means can grasp | ascertain correctly the bias position of the laundry in a drum from a motor electric current value.

  According to a fourth aspect of the present invention, the second position detecting means of the drum type washing machine according to any one of the first to third aspects is provided in the washing tub, and emits light in synchronization with a rotational speed of the drum. And a light receiving portion that detects reflected light of the light from the light emitting portion, and detects the position of the ball from a synchronization signal of the light receiving portion. Thereby, when detecting the ball movement position of the rotating body control device from the synchronization signal of the light receiving unit, the light receiving unit and the light emitting unit of the second position detection unit are not continuous light, but are synchronized with the rotation speed. Light emission and reflected light are received at the same position of the balancer outline. For this reason, it is possible to measure the amount of transmitted light with little variation in the amount of light received due to the variation in the transmittance of the outer portion, to perform stable position detection, and to constantly light up by intermittent light emission Since there is no, energy saving can be improved.

  Hereinafter, Embodiments 1 to 3 of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration diagram of a drum-type washing machine according to Embodiment 1 of the present invention. FIG. 2 is a control block diagram of the drum type washing machine in the first embodiment of the present invention.

  In FIG. 1, the drum-type washing machine main body 1 includes a drum 3 for storing laundry 18, a washing tub 22 for storing the drum 3 therein, and a damper 19 for supporting the washing tub 22. The inner peripheral wall of the drum 3 is provided with baffles 7 (three in the first embodiment) for lifting and stirring clothes when the drum 3 rotates. A balancer 8 in which a plurality of balls 9 (for example, iron balls) are enclosed is provided on the laundry input port side on the front side of the drum 3. The balancer 8 rotates together with the drum 3, and the balls 9 arranged in a line in the balancer 8 can freely move in the rotation direction.

  A drum pulley 4 provided on the same axis as the drum 3 is provided on the back side of the drum 3. The drum 3 is rotated by transmitting the drive of the motor 12 to the drum pulley 4 via the belt 6.

  The motor 12 is provided with a rotor position detector 15 that detects the rotor position of the motor 12. The rotor position detection unit 15 detects the rotor position, and the control unit 13 performs control to drive the motor 12. Since the motor 12 is a permanent magnet synchronous motor, the rotor position of the motor 12 is detected by the rotor position detector 15 and input to the rotation controller 132 so that the motor 12 rotates without being stepped out.

  The rotation position of the drum 3 is detected by the rotor position detection unit 15 because the rotor position detection unit 15 operates at a reduction ratio based on the ratio between the motor pulley 5 and the drum pulley 4 via the belt 6. Can be judged.

  In FIG. 2, the control unit 13 that performs drive control of the drum type washing machine includes a determination unit 131 and a rotation control unit 132. The determination unit 131 includes a current detection unit 101 that detects a current flowing through the motor 12, and includes a first position detection unit 10 that detects an unbalanced position due to the bias of the laundry 18. The rotation control unit 132 includes a drive unit 133 that drives the motor 12, and performs rotation control of the motor 12 via the drive unit 133 based on a signal from the rotor position detection unit 15. The first position detection means 10 detects the current fluctuation value and fluctuation detected by the current detection unit 101 when the motor 12 is driven at an equilibrium rotational speed such that the centrifugal force acting on the laundry 18 in the drum 3 balances with gravity. The unbalanced position is determined based on the known state. The rotational speed of the drum 3 at this time may be a rotational speed that is equal to or higher than the equilibrium rotational speed that balances the centrifugal force acting on the laundry 18 and gravity. In short, the rotational speed may be such that the laundry 18 sticks in the drum 3 and it can be determined where the unbalance position A is.

  The second position detecting means 11 can detect that the plurality of balls 9 rise in the balancer 8 and reach the upper part of the balancer 8.

  The second position detection means 11 is provided in the upper part of the washing tub 22. Thereby, since the drum 3 can be accelerated when the unbalanced position is located below the washing tub 22, the drum can be accelerated before the ball is divided into two. The second position detection means 11 is provided in front of the uppermost part of the washing tub 22 with respect to the rotation direction. In Embodiment 1 of the present invention, the rotation direction of the drum 3 during dehydration is clockwise when viewed from the front side of the drum 3. Therefore, the second position detecting means 11 is provided on the left from the top of the washing tub 22 as viewed from the front side. As a result, the second position detection unit 11 can detect the ball 9 when the gravity applied to the plurality of balls 9 is in a position where rotation is suppressed. Therefore, the drum 3 can be accelerated before the ball 9 is divided into two by moving to a position where the gravity applied to the plurality of balls 9 accelerates the rotation.

  The second position detection unit 11 includes a synchronous light emitting unit 111 and a synchronous light receiving unit 112. The synchronous light emitting unit 111 emits light in synchronization with the rotational speed of the drum 3, and the synchronous light receiving unit 112 receives reflected light of light emitted from the synchronous light emitting unit 111 in synchronization with the rotational speed. When the light from the synchronous light emitting unit 111 is applied to the ball 9 in the balancer 8, the second position detecting unit 11 changes the amount of light received by the synchronous light receiving unit 112, and determines the signal from the synchronous light receiving unit 112 as a determination unit 131. To enter.

  The determination unit 131 detects the unbalanced position of the laundry by the first position detection unit 10, and detects that the ball 9 is positioned above the drum 3 by the second position detection unit 11. The timing for increasing the rotation speed of the motor is determined.

In the first embodiment, the light sensor of the second position detection unit 11 is described as being based on intermittent light reception / emission based on rotation speed synchronization in which light is emitted in accordance with the rotation speed of the drum 3, but the light emitting portion of the light sensor is continuous. The light emitting unit may emit light and the light receiving unit may continuously receive light and detect the change. To synchronize with the rotation speed of the drum 3 means to emit light once for each rotation of the drum 3. The second position detecting means 11 uses the intermittent light emitting / receiving unit 111 and the synchronous light receiving unit 112 to synchronize with the rotational speed and adopt an intermittent method, so that the same outer portion of the balancer 8 rotating together with the drum 3 The amount of light transmitted through the outer shell is stabilized. Accordingly, since the reflected light similarly passes through the same outer portion, the synchronous light receiving unit 112 receives a stable amount of light at each measurement, so that a change in presence / absence of the plurality of balls 9 can be accurately confirmed at the time of measurement.

  Hereinafter, the unbalance position detection of the laundry 18 and the position detection of the ball 9 in the dehydration process will be described in detail.

  FIG. 3 is a diagram showing an unbalanced state of the laundry at a rotational speed at which gravity and centrifugal force applied to the laundry of the drum type washing machine according to Embodiment 1 of the present invention are balanced. FIG. 4 is a current characteristic diagram of the motor in a state where there is an unbalance of the drum type washing machine in the first embodiment of the present invention. FIG. 5A is a diagram showing an unbalanced position when the current value of the drum-type washing machine in the first embodiment of the present invention is the maximum current value, and FIG. 5B is a diagram in the first embodiment of the present invention. It is a figure which shows the unbalance position in which the electric current value of a drum type washing machine is a minimum electric current value.

  As shown in FIG. 3, the water is drained after the washing process is finished, and the rotational speed until the laundry 18 sticks to the inner surface of the drum 3 (the equilibrium rotational speed at which the centrifugal force acting on the laundry 18 balances with gravity). The laundry 18 sticks non-uniformly to the inner surface of the drum 3 and an unbalanced position A is generated. The rotational speed of the drum 3 at this time is 60 to 100 r / min depending on the amount of cloth and the quality of the cloth. In this state, the ball 9 has not reached the height of the second position detecting means 11.

  If the unbalanced position A of the laundry exists when the drum 3 is rotated at a speed equal to or higher than the equilibrium rotational speed as shown in FIG. 3, the current value of the motor 12 changes as shown in FIG. The current values a and a1 indicate the maximum current value, the current value b indicates the minimum current value, the current difference d indicates the difference between the maximum current value and the minimum value current, and the cycle of the current change c indicates the rotation period of the drum 3.

  FIG. 5A shows a second position in which the laundry 18 of the drum-type washing machine increases the rotation speed while being in an unbalanced state, and the plurality of balls 9 in the balancer 8 are located above the washing tub 22. It is in a state where it has moved to the vicinity of the detection means 11. Furthermore, the case where the unbalance position A of the laundry 18 is located in the upper part in the drum 3 by rotation of the drum 3 is shown.

  FIG. 5B shows a second position in which the laundry 18 of the drum-type washing machine increases the rotational speed while being in an unbalanced state, and the plurality of balls 9 in the balancer 8 are located above the washing tub 22. The unbalanced position A of the laundry 18 is positioned at the lowermost part in the drum 3 (opposite to the second position detecting means 11) due to the rotation of the drum 3 while reaching the vicinity of the detecting means 11. Shows the case.

  5 (a) and 5 (b), the laundry 18 is stuck to the inner wall of the drum 3 at the rotational speed at which the drum 3 is below a certain rotational speed and the laundry 18 is stuck to the inner wall of the drum 3. The drum 3 rotates in synchronization with the rotation of the drum 3. On the other hand, since the plurality of balls 9 move inside the balancer 8, they move without being synchronized with the rotation of the drum 3.

The current value of the motor 12 in the state of FIG. 5A (when the unbalance position A is at the top of the drum 3) is at point a or point a1 in FIG. The current value of the motor 12 in the state of FIG. 5B (when the unbalance position A is at the lowermost part of the drum 3) is at point b in FIG. The unbalance position A of the laundry and the positions of the plurality of balls 9 when the current value changes a → b → a1 change as follows. When the drum 3 rotates rightward when viewed from the front of the drum 3, the unbalanced position A of the laundry 18 is located at the top of the drum 3 as shown in FIG. ), The unbalanced position A of the laundry 18 rotates to the bottom of the drum 3. At this time, the current of the motor 12 changes as a → b. Further, when the unbalance position A rotates again from the unbalance position A in FIG. 5B to the top of the drum 3 as shown in FIG. 5A, the current of the motor 12 changes as b → a1.

  When the unbalance position A due to the laundry 18 rises from the lowermost part to the upper part in the drum 3, the drum 3 is rotated against the gravity, so that the load torque rises and the motor current rises accordingly (FIG. 4). B point → a1 point). On the contrary, when the laundry 18 rotates from the upper part to the lowermost part, the load torque decreases, so the motor current also decreases (point a → b in FIG. 4). Therefore, the position where the unbalance position A of the laundry 18 in the drum 3 is rotating and moving can be determined from the motor current value.

  FIG. 6A is a diagram showing a state where the ball of the drum type washing machine in the first embodiment of the present invention has reached the second position detection unit, and FIG. 6B is a drum in the first embodiment of the present invention. The schematic diagram of the 2nd position detection means of a type washing machine is shown.

  As shown in FIG. 6A, when the drum 3 is rotated to a constant rotational speed that is faster than the rotational speed at which gravity and centrifugal force applied to the laundry 18 are balanced, the plurality of balls 9 in the balancer 8 are Ascend to the top inside.

  As shown in FIG. 6B, when the plurality of balls 9 in the balancer 8 move to the position of the second position detecting means 11, the second position detecting means 11 provided on the upper part of the washing tub 22 is moved to the drum. 3 emits light in synchronization with the rotational speed of 3 and receives the reflected light of the light applied to the ball 9. Thereby, it can be detected that the ball 9 has moved to the upper part of the balancer 8.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the drum type washing machine performs dehydration after draining, the drive unit 133 causes the motor 12 to apply a drive voltage according to a command from the rotation control unit 132 of the control unit 13. Thereby, the motor 12 is gradually operated from the low speed rotation to the high speed rotation, and the rotation speed of the drum 3 is gradually increased.

  Next, the drum 3 under the condition that the gravity applied to the laundry 18 and the centrifugal force due to the rotation of the drum 3 are balanced (the rotational speed at which the laundry 18 is stuck to the inner wall of the drum 3), for example, 60 to 100 r / min. Drive. When the current detection unit 101 measures the current value of the motor 12, the first position detection unit 10 determines that the unbalanced position A in the drum 3 is in the drum 3 from the degree of change in the current value and the rotation cycle of the drum 3. Determine where on the circumference.

  In order to determine which position in the drum 3 the unbalanced position A is, the first position detector 10 has a current value from the current detector 101 that detects the current of the motor 12 as shown in FIG. The current of the motor 12 is measured. When the unbalance position A moves from the lowermost part to the upper part of the drum 3 against gravity, the increase / decrease in the current of the motor 12 and the increase / decrease in the load torque are substantially the same, so the load torque increases and the current increases ( B point-> a1 point of FIG. 4).

  Conversely, when the unbalance position A moves from the upper part to the lower part as seen from the washing tub 22, since the influence of gravity is reduced and the load torque decreases, the current decreases (point a in FIG. 4 → b), that is, the period c of the motor current change from point a → b point → a1 in FIG. The current difference d is determined by the size of the unbalance position A.

  Accordingly, the first position detection means 10 measures the motor current, and measures the current difference d and the period c, so that the presence / absence and size of the unbalance and the unbalance position A are stored in the washing tub 22 when the drum 3 rotates. On the other hand, it is possible to determine the position.

  Next, in a state where the unbalanced position A in the drum 3 is detected, the ball 9 is located below the washing tub 22 as shown in FIG. In addition, the rotational speed of the drum 3 is increased until the drum is positioned above the washing tub 22. As shown in FIG. 6B, when the plurality of balls 9 in the balancer 8 move and approach the second position detection means 11 at the top of the drum 3, the determination unit 131 in the control unit 13. However, the rotational speed of the motor 12 measured by the rotor position detector 15 is synchronized with the rotational speed of the drum 3 in consideration of the reduction ratio, the light is intermittently emitted from the synchronous light emitting unit 111, and the reflected light is transmitted to the synchronous light receiving unit. Light is received at 112, and the presence or absence of a plurality of balls 9 is determined based on the change in the amount of light received.

  When the rotational speed of the drum 3 is further increased to the rotational speed at which dehydration is performed, even if a part of the plurality of balls 9 passes through the upper part of the drum 3, the balls that have not reached the upper part are still affected by gravity, so Moving. On the other hand, since the ball reaching the upper part is not affected by gravity, the moving speed is increased. For this reason, one group of the plurality of balls 9 starts to be divided into two or more groups.

  When the rotational speed of the drum 3 is increased in the state of being divided into two or more groups, the unbalanced state due to the laundry 18 and the plurality of balls 9 are divided into two or more groups in the early stage of the rise, thereby Since the rotation speed is increased, the vibration of the drum 3 is increased. Further, when the plurality of balls 9 are located at the upper part, as shown in FIG. 5A, the unbalance position A due to the laundry 18 in the drum 3 is located at the upper part of the drum 3. In this state, when the rotational speed of the drum 3 is accelerated and increased, the unbalanced state is deteriorated by the amount of the plurality of balls 9, so that the drum 3 generates the maximum vibration and the load torque applied to the motor 12 increases. If the vibration amplitude exceeds the specified value, dehydration cannot be started.

  In order to prevent such a situation from occurring, the first position detecting means 10 knows the position of the drum 3 that is constantly rotating, the unbalanced position A due to the laundry 18 in the drum 3. Further, the drum 3 is accelerated by detecting that the plurality of balls 9 detected by the second position detecting means 11 have reached the upper part of the drum 3. As shown in FIG. 5 (b), when the unbalance position A detected by the first position detection means 10 is positioned on the opposite side of the plurality of balls 9, the control unit 13 controls the rotation speed of the drum 3. The rotation control unit 132 is controlled to accelerate and increase.

  As a result, the unbalanced position A by the laundry 18 and the plurality of balls 9 are opposed to each other, so that the drum 3 and the plurality of balls 9 are accelerated and raised with the drum 3 and the plurality of balls 9 in the minimum unbalanced state. Thereby, the vibration of the drum 3 can be suppressed to the minimum. Further, the plurality of balls 9 can be rotated together with the rotation of the drum 3 in one group without being divided into two at the same time, and the vibration of the drum 3 is continuously minimized and dehydration is started. Can do.

  Therefore, in the state where the laundry 18 is stuck to the drum 3, first, the unbalanced position A is grasped by the first position detecting means 10, and the second position detection that the positions of the plurality of balls 9 are positioned above the washing tub 22. By detecting with the means 11, when the rotational speed of the drum 3 is accelerated and increased, the most balanced state can be obtained. Therefore, it is possible to perform dehydration activation in a state where vibration of the drum 3 is minimized, and it is possible to prevent activation failure due to unbalance. As a result, energy saving and time reduction can be achieved by reducing the load by suppressing vibration.

  The balancer 8 is a ball balancer that uses balls. Generally, when the drum 3 rotates at a rotational speed equal to or higher than the natural frequency, the balancer 8 faces the unbalanced position A due to the laundry 18 stuck in the drum 3. The plurality of balls 9 are automatically moved in the balancer 8 to the position where the rotation is performed, and a biased force is prevented from being applied to the rotating shaft of the drum 3. Once the dehydration rotation speed is reached, the plurality of balls 9 move to a position where the unbalance is eliminated, but at the time of dehydration activation, the unbalance position A and the plurality of balls 9 are at the same position. It may be in the worst state, and vibration will increase. However, this problem can be solved by minimizing imbalance during low rotation before dehydration activation.

  Embodiment 1 of the present invention, the rotational speed of the drum 3 is calculated from the rotor position detection unit 15 and the reduction ratio, and the synchronous light emitting unit 111 and the synchronous light receiving unit 112 of the second position detecting unit 11 are controlled. As described above, the controller 13 may control the second position detection unit 11 by providing a rotation speed meter or the like on the rotation shaft of the drum 3.

  In addition, although it has been described that the second position detector 11 receives and emits light in synchronization with the rotation speed of the drum 3, it may be performed with continuous light. Since the balancer 8 is also rotated together with the drum 3, continuous light is emitted in a state where the outer portion of the balancer 8 is always rotated and moved. For this reason, the amount of received light always changes depending on the degree of transmission of the outer portion. Therefore, in the case of using continuous light, the degree of change in the amount of received light due to reflected light when there is no plurality of balls 9 and the degree of change in the amount of received light when there are reflections from the plurality of balls 9 are controlled as conditions in advance. The determination accuracy can be ensured by holding the unit 13.

  The second position detection means 11 emits and receives light in synchronization with the rotational speed of the drum 3 by the synchronous light emitting unit 111 and the synchronous light receiving unit 112, and a plurality of balls 9 (for example, iron balls) are changed by the change in the amount of received light. It is detected whether the position of the position has been raised to a predetermined position. However, the present invention is not limited to this, and a plurality of balls 9 in the balancer 8 are iron balls or magnetic balls magnetized to the S pole or N pole, and the detection method of the second position detecting means 11 is changed from the magnetized balls. The induction machine electric power by the Hall element or coil for detecting the magnetic field may be detected, and the position of the plurality of balls 9 may be detected by the magnetic field detection by the control unit.

  Further, even when the balancer 8 includes a plurality of balls 9 and a certain amount of liquid (for example, viscous transparent oil or transparent salt water), the liquid is transparent and the plurality of balls 9 If the reflected light can be received by the second position detecting means 11, the same effect and operation can be obtained.

  Further, in order to suppress the vibration of the drum 3 at the time of dehydration activation, it has been described that the drum 3 is rotated and accelerated while minimizing the unbalanced state. When unraveling, it is possible to intentionally rotate the position of the plurality of balls 9 in the balancer 8 and the unbalanced position A in the drum 3 for a short time in the same direction. Accordingly, even when the clothes that are biased in the drum 3 are loosened to operate as a method of canceling the unbalanced state, it can be implemented by grasping the unbalanced position and the plurality of ball positions.

  As described above, the drum-type washing machine according to the present invention detects the unbalanced position and grasps the positions of a plurality of balls for suppressing the balance, thereby starting dehydration with the unbalance minimized, and vibrating. This is useful for household and commercial drum-type washing machines and drum-type washing and drying machines.

DESCRIPTION OF SYMBOLS 1 Drum type washing machine main body 3 Drum 4 Drum pulley 5 Motor pulley 6 Belt 7 Baffle 8 Balancer 9 Ball 10 1st position detection means 101 Current detection part 11 2nd position detection means 111 Synchronous light emission part 112 Synchronous light reception part 12 Motor 13 Control part 131 Determination unit 132 Rotation control unit 133 Drive unit 15 Rotor position detection unit 18 Laundry 22 Washing tub

Claims (4)

A drum for storing laundry;
A washing tub for storing the drum;
A motor for driving the drum;
A control unit for driving and controlling the motor;
A rotating body control device having a plurality of balls inside;
First position detecting means for detecting an unbalanced position of the laundry when the motor is driven at a rotational speed at which the laundry is stuck in the drum;
Second position detection means for detecting the position of the ball by a light emitting and receiving element provided in the washing tub,
The control unit is configured to detect the drum when the unbalance position detected by the first position detection unit when the second position detection unit detects the ball is positioned at a position opposite to the ball position of the second position detection unit. Drum-type washing machine that accelerates. The drum-type washing machine according to claim 1, wherein the second position detection means is provided in an upper part of the washing tub. The first position detecting means includes a current detection unit that detects a fluctuation value and a fluctuation period of the current of the motor, and the fluctuation value and the fluctuation period of the rotation speed at which the laundry is stuck in the drum are The drum type washing machine according to claim 1 or 2, wherein the unbalance position of the laundry is determined. The second position detecting means includes a light emitting unit that is provided in the washing tub and emits light in synchronization with a rotation speed of the drum, and a light receiving unit that detects reflected light of the light from the light emitting unit, The drum type washing machine according to any one of claims 1 to 3, wherein the position of the ball is detected from a synchronization signal of a part.

Images