JP2015096233A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-vibration drum type washing machine in which a vibration sensor is arranged by avoiding a position which becomes a node of vibration in a plurality of vibration modes of an outer tub, and in which highly accurate vibration detection is achieved.SOLUTION: A washing machine includes: a drum 3; an outer tub 2; a vibration-proof support mechanism 5; a drive mechanism; a control device; and a vibration detection device 30. The vibration detection device detects acceleration at least for two axes. The vibration detection device is arranged at one place which is in front of the outer tub, and also, in dewatering, which is in the direction in which clothes fall by a drum rotating with respect to the left and right direction when viewed from the front and also on a further lower side of a rotation center of the drum, or in the direction in which the clothes go up by the drum rotating with respect to the left and right direction and also on a further upper side of the rotation center of the drum. The drive mechanism is installed in the direction in which the clothes go up by the drum rotating with respect to the left and right direction in dewatering, and also on the further lower side of the rotation center of the drum. A drainage pump is provided on the opposite side in the left and right direction from the vibration detection device.

Description

  The present invention relates to a washing machine having a configuration in which an outer tub containing a drum and an outer frame are supported by an anti-vibration support mechanism.

  In a conventional drum type washing machine, a drum for storing laundry is connected to an outer tub for storing water via a shaft. Further, the drum is rotated by a motor via a shaft. The outer tub is supported on the outer frame by an anti-vibration support mechanism so that vibration generated in each process of washing, dehydration, and drying is not transmitted to the outer frame.

  In order to perform dehydration operation with low vibration and low noise in a drum-type washing machine, how to place the laundry evenly on the inner wall of the drum, and the rotational speed of the drum with little unbalance in the laundry The problem is to raise the water and perform dehydration. For that purpose, it is important to grasp the state of unbalance and redo the process of attaching clothing when the unbalance is large. Until now, the level of unbalance is detected by the output of the vibration detector installed in the outer tub or outer frame, and the rotation speed is increased to perform dehydration, or the rotation speed of the drum is decreased to equalize the laundry. There has been proposed a method for determining whether to start over from the process of attaching to the screen. However, since the vibration pattern of the outer tub varies depending on the amount and position of unbalance, it is difficult to grasp the amount and position of unbalance with a single-axis acceleration sensor.

  Therefore, a method has also been proposed in which the front and rear positions of unbalance are determined and a determination is made to increase the rotational speed according to the result. For example, the vibration detection means that can detect vibrations in multiple directions of two or more axes identifies the unbalance position in the front-rear direction of the laundry from the phase difference of each vibration component, and shifts to high-speed dehydration according to the unbalance position There has been proposed a method for individually setting the threshold value of the determination means (Patent Document 1).

JP 2006-311885 A

  In a drum-type washing machine, a plurality of vibration modes appear in the process of increasing the dewatering rotation speed, and there are positions where the displacement becomes small in each mode. When the vibration detection device is installed at such a position, the output of the vibration detection device is small and the outer tub vibrates because the outer tub vibrates but does not vibrate at the position of the vibration detection device. Otherwise there is a risk of false detection.

  The present invention solves the above-mentioned conventional problems, and proposes to avoid the installation of a vibration sensor at a location that becomes a vibration node in a plurality of vibration modes of the outer tub, and to perform highly accurate vibration detection. An object of the present invention is to provide a drum-type washing machine with low vibration.

  In order to solve the conventional problems, the present invention includes a drum for storing laundry, an outer tub containing the drum, an anti-vibration support mechanism for supporting the outer tub on an outer frame, and the anti-vibration mechanism. In the washing machine, comprising: a drive mechanism that is attached to the rear side of the vibration support mechanism and rotationally drives the drum; a control device that controls the drive mechanism; and a vibration detection device that detects vibration displacement of the outer tub. The detection device detects acceleration with at least two axes, and the drum rotates in front of the outer tub when viewed from the front when the vibration detection device is dehydrated. One direction is installed in the direction in which the clothes fall and below the rotation center of the drum, or in the direction in which the clothes lift by rotating the drum with respect to the left and right direction and above the rotation center of the drum, The drive mechanism drives the drum via a belt, and the drive mechanism is installed in a direction in which clothes are lifted by rotating the drum with respect to the left-right direction during dehydration and below the rotation center of the drum, A drainage pump is provided on the opposite side of the vibration detection device and the left-right direction.

  The drum type washing machine of the present invention can accurately detect imbalance according to the biased state of the laundry for a plurality of vibration modes, and appropriately controls the drum rotation speed according to the result. Thus, a dehydrating operation with small vibration can be performed.

It is a figure which shows the external appearance of the drum type washing machine which concerns on one Embodiment of this invention, (a) is a top view, (b) is a front view. It is a side view which shows the structure inside the drum type washing machine of this invention. It is a front view which shows the structure inside the drum type washing machine of this invention. It is a schematic diagram which shows the vibration mode of an outer tank. It is a schematic diagram which shows the state of the vibration of the rotational speed from which the rotational motion of the y-axis becomes resonance. It is a schematic diagram which shows the installation position of the vibration detection means of this invention, (a) is a front view, (b) is a side view. It is a front view which shows the internal structure of the drum type washing machine of 2nd Embodiment. It is a front view which shows the internal structure of the drum type washing machine of 3rd Embodiment. It is a front view which shows the internal structure of the drum type washing machine of 4th Embodiment. It is a rear view which shows the internal structure of the drum type washing machine of 4th Embodiment. It is a front view which shows the internal structure of the drum type washing machine of 5th Embodiment. It is a rear view which shows the internal structure of the drum type washing machine of 5th Embodiment.

  Hereinafter, examples will be described with reference to the drawings.

  Embodiments of the present invention will be described below with reference to the drawings.

  1A and 1B are views showing an external appearance of a drum type washing machine 100 according to an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a front view. FIG. 2 is a side view showing an internal structure of the drum type washing machine 100 shown in FIG. FIG. 3 is a front view showing an internal structure of the drum type washing machine 100. For the sake of clarity, the front and rear, left and right, and up and down directions are set as shown in FIG. Moreover, the arrow of FIG. 3 shows the rotation direction of the drum at the time of dehydration.

  As shown in FIG. 1, the drum-type washing machine 100 has an outer frame 1 whose outer shell is configured by combining a steel plate and a resin molded product. The outer frame 1 includes a base 1f, and left and right side plates 1a, 1b, a front cover 1c, a back cover 1d, and a top cover 1e are attached above the base 1f to form a box-shaped outer frame 1. ing.

  At the approximate center of the front cover 1c, there is formed an inlet (not shown) through which laundry such as clothes is taken in and out of the drum 3 (see FIG. 2). A door 7 that is opened and closed is attached to be openable and closable by a hinge mechanism (not shown). A handle 7 a for releasing a lock mechanism (not shown) of the door 7 is provided on the right side of the door 7. By pulling the handle 7a forward, the locking mechanism is released and the door 7 is opened, and the door 7 is pressed against the front cover 1c to be locked and closed.

  An operation panel 6 including a power switch, an operation switch, a course setting dial, a display device, and the like is provided on the outer frame 1. On the left side of the operation panel 6, a drawer-type detergent box (detergent throwing section) 11 for placing a detergent, a finishing agent and the like is arranged.

  As shown in FIG. 2, the drum-type washing machine 100 includes a drum 3 in the outer frame 1 as an inner tub that can store laundry. The drum 3 is rotatable around a shaft 20 coupled to the drum 3. An opening 3a for taking in and out the laundry is formed on the front end surface of the drum 3, and a fluid balancer 3b integrated with the drum 3 is provided outside the opening 3a in the radial direction.

  The shaft 20 connected to the drum 3 is set horizontally here. However, the rotation axis of the drum 3 may be inclined so that the opening 3a side becomes higher. In such a case, below or above the rotation axis of the drum is based on the position when the rotation axis of the drum 3 is projected onto the side surface of the outer frame 1. 2 shows a state in which the left side plate 1a, the back cover 1d (not shown), and the top cover 1e of the drum type washing machine 100 are removed.

  As shown in FIG. 2, the drum type washing machine 100 includes a cylindrical outer tub 2 having a drum 3 disposed therein and having a closed rear surface for storing water, coaxially with the drum 3. 2 is supported by the outer frame 1. A motor 4 for rotationally driving the shaft 20 is attached to the center on the back side of the outer tub 2, and the shaft 20 penetrates the outer tub 2 and is coupled to the drum 3.

  As shown in FIGS. 2 and 3, the outer tub 2 is supported in a vibration-proof manner by a vibration-proof support mechanism 5 whose lower side is fixed to the base 1f. The anti-vibration support mechanism 5 includes a suspension 5 a that supports the weight of the outer tub 2 and a damper 5 b that attenuates vibration of the outer tub 2. A drain port (not shown) is provided at the lowermost part of the outer tub 2. The drain port is connected to the drain pump 12 via a drain pipe (not shown), and the washing water in the outer tub 2 is configured to be discharged from the drain port to the outside of the machine through the drain pipe. Yes. In addition, a vibration detection device 30 that detects vibration displacement of the outer tub 2 is installed in the lower left portion of the outer tub 2. When the displacement of the outer tub 2 detected by the vibration detection device 30 is larger than a predetermined value, the rotation of the drum 3 is stopped and restarted. By doing in this way, it becomes possible to start the drum type washing machine 100 safely. If the drainage pump 12 is located near the vibration detection device 30, it may cause noise. Therefore, the drainage pump 12 is installed on the opposite side of the vibration detection device 30 in the left-right direction. In FIG. 3, the vibration detection device 30 is installed on the left side, and the drainage pump 12 is installed on the right side.

  On the upper left side in the outer frame 1, a liquid supply unit 10 for supplying water, a detergent, a finishing agent and the like into the outer tub 2 is provided. A water supply hose connection port 8 from a water tap is provided on the upper left side of the back surface of the outer frame 1. The water supply hose connection port 8 is connected to the water supply valve 9.

  As shown in FIG. 2, an outer tank cover 21 is attached to the front end of the outer tank 2. An opening 21 a is provided on the front end surface of the outer tub cover 21, and the outer tub 2 is sealed with water by closing the door 7.

  Next, the vibration of the drum type washing machine 100 will be described with reference to FIG. In the drum type washing machine 100, a plurality of vibration modes appear before reaching the final dewatering rotation speed. A sensor that detects vibration needs to detect accurately all these vibration modes.

  FIG. 4 shows changes in the vibration mode of the outer tub 2 when the rotational speed of the drum 3 is increased. Here, the horizontal direction is the x-axis, the vertical direction is the y-axis, and the front-back direction is the z-axis. First, a vibration mode (FIG. 4A) that translates in the front-rear direction when the rotational speed of the drum 3 is about 150 r / min appears, and a vibration mode (FIG. 4B) that translates in the left-right direction at substantially the same rotational speed appears. appear. Since the translational vibration in the front-rear direction is a direction in which the excitation force is difficult to be transmitted, it is unlikely to be a large vibration in actual operation. When the rotational speed of the drum 3 is further increased, translational vibration in the vertical direction (FIG. 4C) and rotational movement about the axis parallel to the y axis (FIG. 4D) appear near 200 r / min. A in the figure is the central axis of the rotational movement. When the rotational speed of the drum 3 is increased, a rotational motion around an axis parallel to the x axis appears at about 300 r / min (FIG. 4E). B in the figure is the central axis of the rotational motion. Since the rotational motion around the axis parallel to the y-axis and the rotational motion around the axis parallel to the x-axis are close to each other in the structure of the support, the rotational speeds of resonance are close. A rotational movement around an axis parallel to the y-axis often appears at a lower rotational speed. Furthermore, when the rotational speed of the drum 3 is increased, the displacement of the outer tub 2 gradually decreases. As described above, when the rotational speed of the drum 3 is increased, a plurality of vibration modes appear. Therefore, it is desirable to install the vibration detection device 30 at a detectable position in all of these vibration modes.

  In the case of the rotational motion as shown in FIGS. 4D and 4E, there is a position that becomes a rotational axis of vibration. For example, as shown in FIG. 5A, when only a rotational motion around an axis parallel to the y-axis occurs, all of the x-axis direction, the y-axis direction, and the z-axis direction at points on the central axis of the rotational motion. This is a vibration node in which almost no displacement (acceleration) occurs. Therefore, although the outer tub 2 vibrates, no acceleration is generated at the position of the vibration detection device 30, so it is difficult to detect the vibration of the outer tub 2. On the other hand, as the position is farther from the rotation axis, the displacement becomes larger and the detection becomes easier. Therefore, it is important to obtain an output without becoming a rotation axis of vibration in all rotation speed regions to be used.

  In the case of a vibration system such as the drum type washing machine 100, the vibration mode shown in FIG. 4 rarely appears alone, and a plurality of vibration modes often appear at the same time. FIG. 5 shows the state of vibration when the drum 3 is rotating at about 200 r / min. Here, 200 r / min is the resonance rotational speed of the rotational motion around the axis parallel to the y-axis. The rotation direction of the drum 3 is counterclockwise. The direction of rotation of the drum 3 at the time of dehydration refers to the direction of rotation at a rotational speed that finally rises. Consider a rotational motion around an axis parallel to the y-axis and a rotational motion around an axis parallel to the x-axis.

  FIGS. 5A and 5B show the state of rotational movement around an axis parallel to the y-axis. FIG. 5A is a top view and FIG. 5B is a perspective view. C shown in FIG. 5 is a central axis of rotational movement. In the case of the drum type washing machine 100, the motor 4 that drives the drum 3 is often installed at the rear part of the outer tub 2. Furthermore, in order to support the drum 3 and the outer tub 2 rearward by the shaft 20, a member for increasing the strength is installed at the rear part of the drum 3 and the outer tub 2. Further, the front of the outer tub 2 and the drum 3 are opened for putting clothes. In this way, the rear of the outer tub 2 is heavy and the front is small, so that the center of gravity of the vibrating part including the outer tub 2 and the drum 3 is rearward. As a result, the rotation axis of the vibration is behind the vibration part as shown by a position C in FIG. The arrows in the figure indicate the magnitude and direction of vibration. The solid line arrow indicates the vibration direction in the unbalanced state shown in FIG. 5B, and the dotted line arrow indicates the vibration direction when the drum 3 rotates 180 degrees from FIG. 5B.

  In general, when the rotational speed is sufficiently lower than the resonance, the phase difference between the excitation force and the vibration displacement is small. As the resonance rotational speed is approached, the phase of the vibration displacement is gradually delayed with respect to the excitation force, and the resonance rotational speed is delayed by 90 degrees. When the rotational speed is further increased, the phase delay increases, and at a sufficiently high rotational speed, it is delayed by 180 degrees. Since 200 r / min is near the resonance rotational speed of the vibration in the left-right direction, the displacement is delayed by 90 degrees with respect to the unbalanced position. Therefore, as shown in FIG. 5B, when the front imbalance comes to the lower part, the front of the outer tub 2 is greatly displaced to the left. In order to detect this vibration, the rotation angle can be obtained by detecting the left-right vibration in front of the outer tub 2 away from the central axis of the rotational movement, or the front-back vibration near the left and right ends of the outer tub 2. . On the other hand, in the vicinity of the central axis of the rotational motion, a vibration node with almost no acceleration is generated, so that the vibration detection means 30 cannot detect it.

  Next, FIGS. 5C and 5D show the rotational motion around the axis parallel to the x-axis. D shown in FIG. 5 is the central axis of the rotational motion. FIG. 5C shows the vibration of the lower part of the outer tub 2 when the outer tub 2 is viewed from above. FIG. 5D is a perspective view showing the position of unbalance and the direction of vibration. Since the resonance rotational speed of the rotational motion around the x-axis is around 300 r / min, it is sufficiently small if the rotational speed of the drum 3 is 200 r / min, and the difference between the unbalanced position and the phase of the vibration displacement is small. That is, when the front unbalance is at the lower part, the lower part of the outer tub 2 is largely displaced later. In order to detect this displacement, it is obtained by detecting the longitudinal displacement near the upper and lower ends of the outer tub 2 or the vertical displacement of the front end of the outer tub 2.

  When the vibrations shown in FIGS. 5A and 5C appear at the same time, the vibration in the lower part of the outer tub 2 becomes the vibration shown in FIG. Paying attention to the vibration displacement in the front-rear direction, the left side of the outer tub 2 is displaced later and the right side is displaced forward by the rotational movement around the axis parallel to the y-axis. On the other hand, the lower part of the outer tub 2 is displaced later by the rotational movement around the x-axis. Accordingly, the right side of the outer tub 2 is less displaced because the longitudinal displacement due to the two vibration modes cancels out. On the other hand, since the vibration directions of the two vibration modes are the same on the left side, the displacement increases. Therefore, when the vibration detection device 30 is projected on the left side of the outer tub 2 and the rotation axis of the drum 3 and the vibration detection device 30 are projected onto the side surface of the outer frame 1, the vibration detection device 30 is positioned below the rotation axis of the drum 3. Acceleration can be easily detected by installing as described above.

  Furthermore, in order to separate the above two vibrations, it is necessary to detect the top and bottom or the left and right direction in front of the outer tub 2 in addition to the longitudinal vibration, so the vibration detecting means 30 is installed in front of the outer tub 2. Is desirable. In this way, vibration can be separated by detecting acceleration on at least two axes, for example, the x-axis and the z-axis.

  If the vibration detector 30 cannot be installed in the lower part of the outer tub 2, it will be installed in the upper part of the outer tub 2. However, the upper part of the outer tub 2 has the opposite direction of vibration in the front-rear direction. It is desirable to install in the direction in which the clothes are lifted.

  In the present embodiment, the vibration detection device 30 is installed on the side surface of the outer tub 2 as shown in FIGS. 2 and 3, but it is not necessarily installed on the side surface of the outer tub 2, and is viewed from the front. You may install in the back surface of the outer tank 2 or the outer tank cover 21 if it is the position proposed sometimes. Furthermore, in order to reduce the vibration of the outer tub 2, you may install in the weight installed in the outer tub 2 and the outer tub cover 21, the air path for drying attached to the outer tub 2, etc.

  Further, the support of the outer tub 2 is often left-right symmetric, and the vibration detection device 30 is located between the left and right connecting portions of the outer tub 2 and the anti-vibration support mechanism 5 at or near the central axis of the rotational motion. It is not desirable as the installation position. Therefore, it is desirable that the vibration detection device 30 be installed outside the left and right connection portions of the image stabilization support mechanism 5.

  FIG. 6 shows an installation position of the vibration detection means 30 for detecting the vibration of the outer tub 2 with high accuracy. FIG. 6A is a front view, and FIG. 6B is a side view. The range of F in the figure is the installation position of the vibration detection device 30 proposed in the present invention. The arrows in the figure indicate the direction of rotation of the drum 3. When the rotation direction of the drum 3 is reverse, the position where the range F in FIG.

  By doing in this way, the vibration detection apparatus 30 can be installed avoiding the position which becomes a vibration node, and it can detect with high precision.

  In this embodiment, the detection accuracy is improved by installing the vibration detection device 30 at a position where the displacement is large. If the vibration detection device 30 is installed at a position where the detection range is small and the vibration displacement is large, the vibration detection device 30 is saturated and cannot be measured correctly. Thus, a position where the displacement of the outer tub 2 is small is measured, and the vibration detection device 30 can be prevented from being saturated.

  The drum type washing machine 100 of the present embodiment has a drain pump 13 for discharging water used for washing and the like out of the machine body. The drainage pump 13 is operated at the start of dehydration or when the rotation of the drum 3 is raised during dehydration, and discharges water accumulated in the outer tub 2. Therefore, since it operates also when the vibration detection device 30 detects the vibration of the outer tub 2, it is affected by noise due to the operation of the drainage pump. Therefore, it is necessary to install the drain pump 13 at a position opposite to the left and right direction away from the position where the vibration detection device 30 is installed. By doing in this way, the influence of the noise at the time of operation | movement of the drainage pump 13 can be reduced, and it becomes possible to detect a vibration with high precision.

  FIG. 7 is a schematic view showing a method for supporting the outer tub 2 of another embodiment. The outer tub 2 has an upper portion supported by a pair of left and right suspensions 41 and a lower portion supported by a damper 42 that is a damping mechanism. The inner side of the suspension 41 and the damper 42 of the outer tub 2 in the left-right direction is a central axis of rotational movement around an axis parallel to the y-axis or a vibration node near the axis, and therefore vibration is small. Therefore, if the vibration detection device 30 is installed at that position, the vibration is output small and the actual vibration cannot be measured correctly. Therefore, it is desirable to install the vibration detection device 30 outside the suspension 41 and the damper 42. Here, when the suspension 43 is installed coaxially with the damper 42 and supported from the lower part of the outer tub 2, it is desirable that the suspension 43 is installed outside the connecting portion between the suspension 41 and the outer tub 2 in the left-right direction.

  FIG. 8 is a schematic diagram showing the internal structure of another embodiment. A heating means 43 for heating water is provided at the lower part of the outer tub 2, and the washing performance is improved by heating the water when washing and rinsing. When the outer tub 2 is warmed by high-temperature water, the temperature of the vibration detection device 30 installed in the outer tub 2 will also rise. In general, when the vibration detection device 30 reaches a predetermined temperature or higher, a change in sensitivity, a decrease in life, and the like occur, which is not desirable. Therefore, it is desirable to install the vibration detection device 30 away from the portion that the heating means 43 and the hot water of the outer tub 2 touch. Therefore, the vibration detection device 30 is installed on the rib 44 (not shown) of the outer tub 2 and the protrusion 44 provided on the surface that is touched by the hot water. By doing in this way, the temperature rise of the vibration detection apparatus 30 can be suppressed, and it becomes possible to ensure detection accuracy irrespective of the operating conditions.

  9 and 10 show the internal structure of the drum type washing machine that transmits the power of the motor 52 to the drum 3 by connecting the belt 51 to the pulley 53 fixed to the motor 52 and the shaft (not shown) of the drum 3. FIG. FIG. 9 is a front view with the front cover 1c and the operation panel 6 removed so that the internal structure can be seen, and FIG. 10 is a rear view with the rear cover 1d removed so that the internal structure can be seen. The arrows in the figure indicate the direction of rotation of the drum 3 during dehydration. Since the motor 52 does not need to be installed on the back surface of the outer tub 2 through the belt 51, the installation space in the front-rear direction can be reduced. In such a case, the motor 52 is installed on the side surface of the outer tub 2. In a drum-type washing machine having a configuration via the belt 51, a commutator motor is often used for the motor 52. In the commutator motor, the vibration detection device 54 is often not installed in view of cost reduction. In order to rotate the drum at high speed at the time of dehydration, it is necessary to grasp the unbalanced state in the drum 3, and therefore, high-speed dehydration is not performed. However, in order to improve the dewatering performance, it is necessary to rotate the drum 3 at a high speed, and it is necessary to employ the vibration detection device 54 even in a drum type washing machine using a commutator motor. If the commutator motor rotates at a high speed, it causes noise in the vibration detection device 54. Therefore, it is desirable to install the commutator motor in a position that avoids the installation position of the vibration detection device 54.

  As shown in FIG. 9, the detergent box 11, the substrate 55, and the like are arranged on the upper part of the outer frame 1, so it is desirable to install the motor 52 at the lower part of the outer tub 2. Furthermore, in order to use the inside of the outer frame 1 effectively, it is shifted to the right and left instead of directly under the outer tub 2. By doing in this way, the height of the main body can be reduced. Since the motor 52 causes noise of the vibration detection device 54, it is not desirable to install the motor 52 nearby. Therefore, since it is desirable to install the vibration detection device 54 in the lower part on the side where the clothes fall with respect to the rotation direction of the drum 3, the motor 52 rotates the drum 3 during dehydration on the opposite side of the vibration detection device 54. It is desirable to install on the side where the clothes are lifted with respect to the direction. By doing in this way, the influence of the noise by the motor 52 can be reduced, and vibration can be detected with high accuracy.

  In this embodiment, the vibration detection device 54 is installed at a position on the lower left side of the outer tub 2, but if it is installed directly on the cylindrical portion of the outer tub 2, the screw for fixing the vibration detection device 54 does not penetrate. It is necessary to increase the plate thickness of the outer tub 2. Therefore, as shown in FIG. 9, by providing the outer tank 2 with the protrusion 54a and installing the vibration detecting device 54 on the protrusion 54a, the plate thickness of the outer tank 2 is not increased more than necessary. Further, when the vibration detection device 54 is fixed in the radial direction of the outer tub 2 at the position shown in FIG. 9, the detection direction of the vibration detection device 54 is not substantially horizontal and vertical, and thus it is difficult to detect the vibration of the outer tub 3. Become. Therefore, it is desirable that the protrusion 54a provided in the outer tub 2 is in a substantially horizontal direction or a substantially vertical direction, and in this embodiment, the protrusion 54a is installed in a substantially horizontal direction.

  11 and 12, the belt 51 is connected to a pulley 53 fixed to a motor 52 and a shaft (not shown) of the drum 3 to detect vibrations in a drum type washing machine that transmits the power of the motor 52 to the drum 3. The internal structure of a drum-type washing machine when the apparatus 54 is installed on the upper part is shown. 11 is a front view with the front cover 1c and the operation panel 6 removed so that the internal structure can be seen, and FIG. 12 is a rear view with the rear cover 1d removed so that the internal structure can be seen. The arrows in the figure indicate the direction of rotation of the drum 3 during dehydration. The operation panel 6 is desirably installed on the upper part of the outer frame 1 from the viewpoint of operability. In order to electrically connect the operation panel 6 and the substrate 55, it is necessary to connect them with the wiring 56. Since the length of the wiring 56 can be shortened by installing it at a close position, it is desirable to install the substrate 55 on the outer frame 1. In addition, if the wiring 56 connecting the vibration detection device 54 and the substrate 55 is long, the wiring 56 is easily affected by noise. Therefore, the wiring 56 can be shortened by installing the vibration detection device 54 in the upper part of the outer tub 2. Further, as described in the other embodiments, when the vibration detection device 54 is installed on the upper part of the outer tub 2, it should be installed on the side where the clothes rise in the left-right direction with respect to the rotation direction of the drum 2 during dehydration. Is desirable. As shown in FIG. 9, when the rotation direction of the drum 2 is counterclockwise, it is the upper right. Therefore, by installing the substrate 55 on the right side of the outer frame 1, the wiring 56 connecting the vibration detecting device 54 and the substrate 55 can be shortened, and the influence of noise can be reduced.

  Furthermore, it is desirable to install the detergent box 11 on the upper part of the outer frame 1 for ease of use and ease of water supply. Since the substrate 55 is installed on the side where the clothes rise with respect to the rotation direction of the drum 3 during dehydration, the upper side on the side where the clothes fall with respect to the rotation direction of the drum 3 during dehydration, which is the opposite side. By installing in, the space in the outer frame 1 can be used effectively, and the size of the main body can be reduced.

  In this embodiment, the drum type washing machine that transmits the power of the motor 52 to the drum 3 through the belt 51 is described as an example. However, the present invention is not limited to the drum type washing machine that transmits the power of the motor 52 through the belt 51. The same applies to a drum-type washing machine in which 52 is installed so as to be coaxial with the rotation axis of the drum 3 and is directly driven.

DESCRIPTION OF SYMBOLS 1 Outer frame 2 Outer tank 3 Drum 4, 52 Motor 5 Anti-vibration support mechanism 6 Operation panel 7 Door 8 Water supply hose connection port 9 Water supply valve 10 Liquid supply unit 11 Detergent box 12 Drain pump 20 Shaft 21 Outer tank cover 30, 53 Vibration Detection device 41 Suspension 42 Damper 51 Belt 54 Drying air passage 55 Substrate 56 Wiring 100 Drum-type washing machine

Claims (1)

A drum for storing laundry, an outer tub containing the drum, an anti-vibration support mechanism for supporting the outer tub on an outer frame, and an anti-vibration support mechanism attached to the rear side of the anti-vibration support mechanism for rotationally driving the drum In a washing machine comprising: a drive mechanism that performs control; a control device that controls the drive mechanism; and a vibration detection device that detects vibration displacement of the outer tub.
The vibration detection device detects acceleration with at least two axes,
The vibration detection device is in front of the outer tub, and at the time of dehydration, the direction in which the clothes fall by rotating the drum with respect to the left-right direction when viewed from the front and below the rotation center of the drum, Or one place is installed above the rotation center of the drum in the direction in which the clothes are lifted by rotating the drum with respect to the left-right direction,
The drive mechanism drives the drum via a belt, and the drive mechanism is installed in a direction in which clothes are lifted by rotating the drum with respect to the left-right direction during dehydration and below the rotation center of the drum,
A drum-type washing machine, wherein a drainage pump is provided on a side opposite to the vibration detection device in the left-right direction.