JP2013132341A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To notice that a mounting state may have a problem on the basis of frequency of vibration detection by an acceleration sensor.SOLUTION: A washing machine comprises: a main body 1; support legs 11 connecting to ground and supporting the main body 1; a receiving cylinder 3 supported with multiple suspensions 2 inside the main body 1; a dewatering bin 5 supported in the receiving cylinder 3 rotatably; a pulsator 7 whose rotation axis is a vertical direction; a cleaning/dewatering axis 4 arranging the pulsator 7 on the base of the dewatering bin 5; a motor 9 linked with the cleaning/dewatering axis 4 and fixed to the receiving cylinder 3; an acceleration sensor 10 attached to the receiving cylinder; and a storage unit. Because the washing machine comprises control means noticing abnormality on the basis of at least not less than one time detection result of vibration by the acceleration sensor, the washing machine can reduce a probability to enter a corrective action of unbalance by noticing defectiveness of a mounting state and making a user adjust mounting and can increase success probability of a setup of dewatering.

Description

  The present invention relates to a washing machine.

  In the fully automatic washing machine, the receiving tube is supported from the outer box by a suspension rod and a suspension for vibration isolation. A dewatering tank is rotatably provided inside the receiving tube. A transmission mechanism that transmits the motor and the power of the motor to the dehydration tank is attached to the bottom of the receiving tube.

  In such a fully automatic washing machine, when trying to rotate the dewatering tub at high speed during the dewatering operation, if the clothes are biased in the tub, the dewatering tub greatly shakes due to the unbalanced load, generating large vibration and noise. Cause. When such a large vibration occurs, drive control that quickly detects vibration and temporarily stops the rotation of the dehydration tank and then re-rotates it, drive control that reduces the rotation speed of the dehydration tank, etc. Therefore, a control operation for eliminating the unevenness of the laundry is required.

  As a means for detecting this vibration, there has been conventionally known an abnormal vibration detection method for a washing machine that detects the occurrence of vibration from the output current of an inverter circuit that performs inverter control of a motor that rotationally drives a tub and outputs an over-vibration warning. (See Patent Document 1).

  In addition, a sensor that detects the shaking of the aquarium is provided, and the transition control from the washing process to the dehydration process is performed based on the vibration detection output detected by this sensor, and the dehydration operation is stopped by detecting abnormal vibration during the dehydration process. A method of operating a washing machine that performs the above is known (see Patent Document 2).

  The vibration of the washing machine is mainly caused by the deviation of the center of gravity of the dewatering tub containing clothes from the rotation axis of the dewatering tub in the receiving cylinder. Since the receiving tube is suspended by the suspension, when the dewatering tub is rotated, the receiving tube of the washing machine moves due to the reaction of moving the center of gravity of the dewatering tub. Therefore, the displacement in the horizontal axis direction observed by the receiving cylinder becomes a sine wave shape with one rotation as one cycle. From this, when an acceleration sensor is attached in the horizontal axis direction, since a sinusoidal acceleration fluctuation having an amplitude corresponding to the deviation of the center of gravity from the rotation axis and the rotation speed can be observed, by detecting the amplitude of the acceleration change, The magnitude of displacement due to vibration can be calculated.

Japanese Patent Laid-Open No. 06-170080 JP-A-61-098286

  In such a conventional washing machine, when vibration is detected, the dehydrating motor is stopped and the rinse is performed again to correct the unbalanced state. By detecting and stopping the vibration, there has been a problem that the correction is repeated many times as compared with the case where there is no vibration sensor, or the stoppage due to an error increases as the correction is repeated. Especially when the installation condition is bad, for example, when the washing machine is tilted, the legs are not firmly attached, the floor is not solid, or placed on something table, the vibration is larger than usual. Therefore, there is a possibility that the above-mentioned correction and stoppage occur frequently.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems and aims to notify a user that there is a possibility that there is a problem in the installation state.

  In order to achieve the above object, the present invention is a washing machine that notifies that there is a possibility that there is a problem in the installation state depending on the frequency of vibration detection by an acceleration sensor.

  This informs you that the installation condition is bad and corrects the installation, so that the probability of entering the imbalance correction operation can be reduced, and dehydration can be successfully launched with a high probability. .

  The washing machine of the present invention informs that the installation state is bad, and corrects the installation, thereby reducing the probability of entering the imbalance correction operation, and making the dehydration start up with a high probability even a little. it can.

Side sectional view of the washing machine according to Embodiment 1 of the present invention. The block diagram which shows the structure of the vibration detection means of the washing machine in Embodiment 1 of this invention. The same block diagram showing the detailed configuration of the vibration detection unit

  The first invention includes a main body, a leg for supporting the main body by grounding, a receiving cylinder supported by a plurality of suspensions having a variable water reducing force inside the main body, and a dewatering tank rotatably supported by the receiving cylinder. A pulsator having a rotation axis in a vertical direction, a washing / dehydrating shaft having the pulsator attached to the bottom of the dewatering tank, a motor linked to the washing / dehydrating shaft, and being fixed to the receiving cylinder, and the receiving Have the user correct the installation status by diagnosing and notifying the installation status based on the vibration detection result of at least one acceleration sensor, having an acceleration sensor attached to the cylinder and a storage device Therefore, it is possible to reduce the probability of entering an unbalance correction operation and succeed in the launch of dehydration with a high probability.

(Embodiment 1)
1 is a side sectional view of a washing machine according to Embodiment 1 of the present invention. In FIG. 1, a main body 1 of a washing machine is installed with legs 11, and a receiving cylinder 3 is suspended and supported by a suspension 2 disposed at an upper end of the main body 1. The washing / dehydrating shaft 4 is hollow and has a biaxial structure. The dewatering tank 5 has a large number of dewatering holes (not shown) on the side wall, a fluid balancer 6 at the upper part of the inner periphery, and a pulsator 7 formed in a pan-shaped shape with an outer periphery inclined at the center bottom. Is arranged. The transmission mechanism 8 includes therein a reduction gear (not shown) for washing and a switching clutch (not shown) for washing and dewatering shafts. The motor 9 is attached to the bottom of the receiving cylinder 3 and rotates the pulsator 7 and the dewatering tank 5 via the transmission mechanism 8. On the outer surface of the receiving tube 3, an acceleration sensor 10 that measures the acceleration of three orthogonal axes in the rotation axis direction, the direction perpendicular to the rotation axis, and the receiving tube tangential direction is attached.

  FIG. 2 is a block diagram showing a configuration of vibration detection means using an acceleration sensor. An acceleration sensor, an A / D converter, and a serial communication function are mounted on the sensor unit. The control means communicates with the sensor unit by using an internal serial communication function, acquires triaxial acceleration data at a constant period, and delivers it to the vibration detection unit. In addition, a non-volatile storage device (not shown) is connected to the control means inside or outside.

  FIG. 3 is a block diagram showing a detailed configuration of the vibration detection unit inside the control means. The vibration detection unit consists of two parts, low speed side and high speed side, which have different vibration and rotational speed accuracy, and each has a noise filter part, which is an acceleration detection unit on the low speed side and an amplitude detection unit on the high speed side. ing.

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

  The control means records in the storage device whether or not vibration is detected at least once by the vibration detection means during each washing operation. If the installation condition is poor, the probability of detecting vibrations is higher than usual. Think about it, and display it when the power is turned on.

  In addition, you may perform alerting | reporting at the time of completion | finish of a driving | operation, or the time of an imbalance detection.

  As described above, the washing machine according to the present invention corrects the installation by notifying the customer of the installation state, reduces the probability of entering an unbalance correction operation, and starts dehydration with a high probability. Useful for success.

DESCRIPTION OF SYMBOLS 1 Main body 2 Suspension 3 Receptacle 4 Washing / dehydration shaft 5 Dehydration tank 7 Pulsator 9 Motor 10 Acceleration sensor 11 Leg

Claims (1)

A main body, a leg that supports the main body by grounding, a receiving cylinder supported by a plurality of suspensions inside the main body, a dehydration tank rotatably supported by the receiving cylinder, and a pulsator with a rotation axis as a vertical direction A washing / dehydrating shaft having the pulsator attached to the bottom of the dewatering tank, a motor linked to the washing / dehydrating shaft, fixed to the receiving cylinder, an acceleration sensor attached to the receiving cylinder, and a memory A washing machine comprising a device and having a control means for notifying abnormality based on vibration detection results of at least one acceleration sensor.

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