JP2017074188A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine capable of enhancing accuracy of vibration detection, which solves conventional problems.SOLUTION: A drum type washing machine includes: a rotary drum 17 for accommodating laundry; a water tub 18 for including the rotary drum 17; a motor 21 for rotationally driving the rotary drum 17; a body 23 for accommodating the water tub 18; a spring body 31 for supporting the water tub 18; a vibration-proof damper 26 mounted between the water tub 18 and the body 23, and for suppressing vibration of the water tub 18; a vibration detection device 30 provided at the water tub 18 and for detecting vibration; and a control device 31 for performing dewatering rotation control according to an output of the vibration detection device 30. The vibration detection device 30 is provided in front of the water tub 18, and in the vicinity position of a side wall of the water tub 18.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drum-type washing machine that controls the vibration of an entire water tank that is a vibration system.

  Conventionally, in order to control vibration, this type of drum type washing machine is provided with a vibration-damping damper at the bottom of the water tank, and the vibration of the water tank unit is suppressed by the damping thereof (see, for example, Patent Document 1).

  FIG. 6 shows a configuration diagram of a conventional washing machine.

  In FIG. 6, the drum 1 for storing the laundry is rotatably disposed in the water tank 3, and a motor 5 that rotates the drum 1 is provided at the bottom of the water tank 3. A lid 8 is provided at the opening of the drum 1 so as to be freely opened and closed. The water tank 3 is held in a posture by a spring body 10 provided between the water tank 3 and a vibration isolating damper 11 so that vibration during dehydration is not transmitted to the housing 9. Further, a seal packing 7 for connecting a gap is provided between the clothing inlet on the front surface of the water tank 3 and the lid 8.

  A vibration detection device 6 using an acceleration sensor is disposed in the center of the front of the aquarium 3, and the vibration of the motor 5 is controlled by controlling the operation of the motor 5 according to the output of the vibration detection device 6. Yes.

JP 2011-56040 A

  However, in the conventional drum-type washing machine, since the vibration detection device is arranged in the center of the front of the machine body, the vibration in the front-rear direction at the vibration detection device installation portion occurs at the time of resonance of the water tank (200 to 300 r / min). Since it is small and has poor detection accuracy in the front-rear direction, it cannot be detected even when clothes are highly biased, and the vibration of the water tank at the time of resonance and the vibration transmitted to the floor may increase.

  The present invention solves such a conventional problem and provides a drum type washing machine capable of increasing the accuracy of vibration detection.

  In order to solve the above-described conventional problems, a drum type washing machine of the present invention includes a rotating drum having a water passage hole on the outer periphery, a water tank that contains the rotating drum and stores washing water, and the rotating drum is driven to rotate. A motor that houses the water tank, a spring body that supports the water tank, an anti-vibration damper that is attached between the water tank and the main body to suppress vibrations of the water tank, and detects vibration provided in the water tank And a control device that performs dehydration rotation control according to the output of the vibration detection device, and the vibration detection device is provided at a front portion of the water tank and in a position near the side wall of the water tank. is there.

The drum type washing machine of the present invention can provide a drum type washing machine capable of increasing the accuracy of vibration detection.

The longitudinal cross-sectional view of the drum type washing machine which concerns on embodiment of this invention Front view showing the inside of the drum type washing machine Top view showing the inside of the drum type washing machine Top view showing the vibration state at the time of resonance of the water tank of the drum type washing machine Output diagram of the vibration detector Vertical section of a conventional drum-type washing machine

  According to a first aspect of the present invention, there is provided a rotating drum having a water passage hole on an outer periphery thereof, a water tank that encloses the rotating drum and stores washing water, a motor that rotationally drives the rotating drum, a main body that houses the water tank, A spring body that supports the water tank, a vibration-proof damper that is attached between the water tank and the main body and suppresses vibration of the water tank, a vibration detection device that detects vibration provided in the water tank, and an output of the vibration detection device The vibration detection device is provided at a position near the front of the water tank and the side wall of the water tank.

  As a result, the accuracy of vibration detection in each axial direction is improved, and by performing dehydration rotation control according to the unbalance position and unbalance amount in the drum, resonance vibration during the dehydration process or vibration transmitted to the floor surface can be obtained. A ram-type washing machine that can be minimized can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

  FIG. 1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention, FIG. 2 is a front view of the inside of the drum type washing machine as viewed from the front, and FIG. 3 is a top view of the rotary drum. It is.

  1, 2, and 3, the rotating drum 17 is formed in a bottomed cylindrical shape, provided with a large number of water passage holes 19 in the outer peripheral portion, and is provided in the water tank 18 through a bearing 15 attached to the water tank 18. It is rotatably arranged. A rotation axis (rotation center axis) 20 is provided at the rotation center of the rotary drum 17, and the axial center direction of the rotation drum 17 is inclined downward from the front side toward the back side. A drum pulley 28 is connected to the back side of the water tank 18 on the rotating shaft 20, and the rotating drum 17 is driven to rotate in the forward and reverse directions by the motor 21 connected by the belt 29 and the drum pulley 28. Several projection plates 22 for stirring clothes are provided on the inner wall surface of the rotating drum 17. The rotating drum 17, the water tank 18, the motor 21, the bearing 15, the drum pulley 28, etc. constitute a vibration water tank unit 37.

  The aquarium unit 37 has a damping damper 26 for damping vibration isolation attached to the base 24 of the washing machine housing 23, and a spring body 31 provided between the upper surface of the washing machine housing 23 and the upper portion of the water tub 18. It is supported in an elastic and vibration-proof manner. A vibration detection device 30 is attached to the front of the water tank unit in the vicinity of the front side wall. In this embodiment, the vibration amplitude of the water tank unit 37 is detected using an acceleration sensor as the vibration detection device 30. The control device 31 receives the signal from the vibration detection device 30 and controls the motor 24 and the like.

  Hereinafter, the operation of the present embodiment will be described. At the time of the washing process, the rotating drum 17 is driven to rotate at a low speed by the motor 21, and the laundry in the rotating drum 17 is washed by being lifted and dropped onto the water surface. During the rinsing process, the rotary drum 17 is driven to rotate at a low speed as in the washing process. At the time of the dehydration process, the rotary drum 17 is rotationally driven at a high speed to centrifugally dehydrate the laundry that has been washed.

  In the drum type washing machine, the vibration amplitude of the water tank unit 37 is maximized when the rotation speed of the rotating drum 17 is gradually increased after the dehydration process is started and the resonance state is obtained. After the resonance state, as the dehydration proceeds and the dehydration of the water contained in the laundry proceeds, the vibration amplitude of the water tank unit 37 gradually decreases and becomes the minimum at a predetermined dehydration speed. In the present embodiment, at the start of the dehydration process, the rotation of the rotating drum 17 is gradually increased to minimize the unbalance of the laundry, i.e., the imbalance, and the laundry is made to rotate by the centrifugal force to the inner wall of the rotating drum 17. The balance cycle is applied evenly. Thereby, the imbalance of the laundry is made as small as possible to suppress vibration due to resonance during dehydration.

  Hereinafter, suppression of vibration will be described in detail. In general, the vibration of the aquarium unit 37 changes according to the amount of unbalance and the position of the unbalance caused by the bias of the laundry, and the vibration due to the translational motion and the rotational motion centered on the center of gravity of the aquarium unit 37. Occur. In particular, when an imbalance occurs diagonally with respect to the rotating drum 17, the load in the direction of rotating the water tank unit 37 increases, and at resonance (around 200 to 300 r / min), as shown in FIG. The vibration in the rotation direction around the center of gravity of the water tank unit 37 is increased.

  In the present embodiment, the vibration detection device 30 is attached to the front portion of the water tank unit 37 and in the vicinity of the side wall, so that when the rotational motion occurs, not only the vertical and horizontal directions but also the longitudinal vibrations are generated. Can be detected.

  FIG. 5 shows the vibration of the water tank unit 37 detected by the vibration detection device 30 of the present embodiment and the conventional vibration detection device. Solid unbalance 600g is disposed at diagonal positions on the inside front and rear of the rotating drum 17, and the vertical axis indicates the amplitude of the water tank unit 37 and the horizontal axis indicates the dehydrating speed as vibration during dehydrating rotation. In particular, at the time of resonance (around 200 to 300 r / min), the vibration detection device 30 according to the present embodiment can detect vibration in the front-rear direction more accurately than the position where the conventional vibration detection device is disposed. I understand that.

  Therefore, if the vibration detection device 30 of the present embodiment is used to detect the vibration of the water tank unit 37, it is possible to accurately detect not only the vertical and horizontal directions but also the large vibration in the front and rear direction. When the unbalance amount is large, the unbalance amount can be reduced by executing the aforementioned balance cycle. As a result, the vibration at the time of resonance of the water tank unit 37 can be greatly reduced, and even when the final rotational speed of dehydration is reached, the amount of unbalance is small and the vibration transmitted to the floor surface is minimized. be able to.

  If the vibration detection of the aquarium unit 37 according to the present embodiment is performed in a state that is greater than or equal to the resonance rotational speed and less than or equal to the predetermined dehydration rotational speed, and the aforementioned balance cycle is performed when the unbalance amount is large, the predetermined dehydration rotational speed The vibration transmitted to the floor surface can be further reduced when reaching the value.

  Since the present invention can improve the accuracy of vibration detection, it can be adopted not only for home use but also for business-use drum-type washing machines.

17 Rotating drum 18 Water tank 26 Anti-vibration damper 31 Spring body 30 Vibration detection device 31 Control device 37 Water tank unit

Claims (1)

A rotating drum provided with a water passage hole on the outer periphery, a water tank that contains the rotating drum and stores washing water, a motor that rotationally drives the rotating drum, a main body that houses the water tank, and a spring body that supports the water tank An anti-vibration damper that is attached between the water tank and the main body and suppresses vibration of the water tank, a vibration detection device that detects vibration provided in the water tank, and dehydration rotation according to the output of the vibration detection device A drum type washing machine, comprising: a control device that performs control; and the vibration detection device is provided at a front portion of the water tank and in a vicinity of a side wall of the water tank.

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