WO2010026719A1 - Washing machine - Google Patents

Abstract

An elastic suspension unit (3), with which a receiving cylinder (2) is suspended from the top of a housing (5), suspends the receiving cylinder (2) from a position that is symmetrical to the rotation axis of a drum (1). An oscillation detection unit (11) detects the oscillation of the receiving cylinder (2), detecting the oscillation in the forward and rearward directions of the receiving cylinder (2). A rotational velocity control unit (13) changes the rotational velocity of a motor (6) according to the size of a frequency component for the forward and rearward oscillation that is calculated by a frequency component calculation unit (12); thus, the state of the clothes can be detected accurately, and the rotational velocity of the drum (1) can be controlled, enabling an improvement in the cleaning performance of a washing machine.

Description

Washing machine

The present invention relates to a drum-type washing machine that includes a rotatable drum in a receiving tube that is elastically supported, and performs washing, rinsing, and dehydration or drying of the laundry in the drum.

Conventionally, in such a drum type washing machine, the drum behavior during washing operation, such as unbalance detection control during dehydration and laundry movement amount detection control during washing, and the laundry behavior in the drum are measured.・ Estimated. By using this result to change the rotation speed of the drum, the laundry situation is appropriately improved by controlling the imbalance during dehydration and controlling the amount of movement of the laundry during washing. .

For example, in Patent Document 1, a semiconductor acceleration sensor is attached to a drum receiving cylinder, and, as shown in FIG. 6, a laundry garment (laundry) is obtained from a change amount 61 of an acceleration sensor output and a change amount 62 of a torque current component of a motor. The behavior of the object). The controller 63 changes the number of rotations of the motor that rotates the drum according to the estimated behavior of the laundry.

However, in the configuration of such a conventional washing machine, it is difficult to grasp the behavior of the laundry and appropriately control the number of revolutions of the drum in order to carry out washing with excellent washing characteristics. That is, there are various types of vibration applied to the receiving cylinder, and it is difficult to accurately grasp the behavior of clothing with a simple change amount of the output value of the acceleration sensor. For example, in addition to the behavior of clothing, it is also assumed that vibration due to the motor itself or vibration of the housing is applied to the receiving tube. Furthermore, the vibration of the receiving tube varies depending on the quantity, weight, and quality of the clothing, and it is difficult to accurately grasp the behavior of the laundry by simply changing the output value of the acceleration sensor.

It is also the same as grasping the behavior of the laundry by the current value indicating the torque component of the motor. For example, when there is a large amount of water during washing and the clothing is lightweight, such as synthetic fiber, there is a case where no correlation is observed between the amount of movement of the clothing by the baffle provided in the drum and the motor torque. Yes. Therefore, it may be difficult to accurately estimate the behavior of the laundry from the torque current component of the motor.

JP 2006-346270 A

The present invention provides a washing machine with excellent washing performance by accurately grasping the washing situation and rotating the drum at a rotation speed optimum for washing.

The present invention includes a drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, an elastic suspension that suspends the receiving cylinder from above the housing, and a vibration damper that supports the receiving tube from below the housing, And a motor for rotating the drum. Further, the present invention provides a vibration detection unit that detects vibration of the receiving cylinder, a frequency component calculation unit that calculates a frequency component for the vibration detected by the vibration detection unit, and a frequency component calculated by the frequency component calculation unit. And a rotation speed control unit that changes the rotation speed of the motor according to the size. Furthermore, the elastic suspension part suspends the receiving tube from a position symmetrical with respect to the rotation axis of the drum, and the vibration detection unit detects vibration in the front-rear direction of the receiving tube. Further, the rotation speed control unit changes the rotation speed of the motor according to the magnitude of the frequency component calculated for the vibration in the front-rear direction.

The present invention also provides a drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, an elastic suspension that suspends the receiving cylinder from above the housing, and a vibration damping damper that supports the receiving tube from below the housing. And a motor for rotating the drum. Further, the present invention provides a vibration detection unit that detects vibration of the receiving cylinder, a frequency component calculation unit that calculates a frequency component for the vibration detected by the vibration detection unit, and a frequency component calculated by the frequency component calculation unit. And a rotation speed control unit that changes the rotation speed of the motor according to the size. Further, the elastic suspension unit suspends the receiving tube from a position on the rotation axis of the drum, and the vibration detection unit detects vibration in the left-right direction of the receiving tube. Further, the rotation speed control unit changes the rotation speed of the motor according to the magnitude of the frequency component calculated for the vibration in the left-right direction.

According to this configuration, the direction of the vibration component derived from the vibration of the receiving tube due to the movement of the laundry is determined by the difference in the support position of the receiving tube with respect to the housing. That is, the direction of the vibration component used for calculation value calculation in the frequency component calculation unit is determined. Accordingly, it is possible to accurately grasp the movement of the laundry in the drum, perform drum rotation control suitable for washing clothes, and improve the cleaning performance.

FIG. 1 is a schematic side view of a washing machine according to Embodiment 1 of the present invention. FIG. 2 is a schematic top view showing the washing machine support structure according to Embodiment 1 of the present invention. FIG. 3A is a graph showing the longitudinal component analysis results obtained from the vibration of the receiving cylinder of the washing machine in the first embodiment of the present invention. FIG. 3B is a graph showing a left-right direction component analysis result obtained from vibration of a receiving cylinder of the washing machine in the first embodiment of the present invention. FIG. 3C is a graph showing the vertical component analysis result obtained from the vibration of the receiving cylinder of the washing machine in the first embodiment of the present invention. FIG. 4 is an explanatory diagram of a washing state inside the drum of the washing machine according to the first embodiment of the present invention. FIG. 5 is a schematic top view showing the washing machine support structure according to Embodiment 2 of the present invention. FIG. 6 is a diagram for explaining the control of the motor rotation speed in a conventional washing machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic side view of the washing machine according to the first embodiment.

As shown in FIG. 1, in the washing machine according to the present embodiment, a receiving cylinder 2 containing a rotatable drum 1 is supported by a housing 5 by an elastic hanging portion 3 and a vibration damping damper 4. A motor 6 is fixed to the bottom of the receiving tube 2, and the drum 1 is rotated at a predetermined rotational speed via a belt 7.

The laundry garment 9 as the laundry put into the drum 1 through the garment loading / unloading port 8 provided in the front of the washing machine is scooped up by the baffle 10 provided in the drum 1 as the drum 1 rotates. And falls from the top to the bottom. The cleaning effect is enhanced by the kinetic energy when struck against the bottom. The vibration of the receiving tube 2 generated by the movement of the laundry 9 is detected by the vibration detection unit 11 and the detection result is transmitted to the frequency component calculation unit 12. Further, the value calculated by the frequency component calculation unit 12 is transmitted to the rotation speed control unit 13, and the motor 6 is corrected and controlled by the rotation speed control unit 13 to a rotation speed at which appropriate tapping is realized.

Here, it is desirable that the support position of the vibration isolating damper 4 is attached on the substantially vertical line or on the vertical line from the center of gravity when the drum 1 and the receiving cylinder 2 are combined. This is detected by the vibration detection unit 11 by stabilizing the bottom of the receiving tube 2 because the vibration at the bottom is large and the shock is continuously received when the laundry 9 falls from the top of the drum 1. This is so as not to include shaking other than the movement of the laundry 9 in the signal to be performed. Note that the vibration detection unit 11 of the present embodiment includes an acceleration sensor, and the acceleration sensor may be any of a semiconductor acceleration sensor, a piezoelectric acceleration sensor, and the like.

FIG. 2 shows an example of a schematic top view showing the support structure in the present embodiment. In FIG. 2, the center of gravity point 14 indicates the center of gravity in a state where the drum 1 and the receiving tube 2 are combined. The receiving tube 2 is supported by the elastic suspension 3 at two support points 15. The center axis 16 indicates the rotation axis of the drum 1.

That is, in the present embodiment, the elastic suspension part 3 suspends the receiving tube 2 from a position symmetrical with respect to the central axis 16 line of the drum 1. More specifically, the elastic suspension portion 3 is a position on a plane including the center of gravity 14 in a state where the drum 1 and the receiving cylinder 2 are combined, and includes the center axis 16 of the drum 1 and extends in the vertical direction. The receiving tube 2 is suspended from a position symmetrical with respect to the plane.

When the elastic suspension part 3 which connects the receiving cylinder 2 and the upper part of the housing | casing 5 is supported by the substantially symmetrical position or the symmetrical position centering on the gravity center point 14 on the center axis | shaft 16 like this Embodiment There is a balanced suspended state. Therefore, periodic vibration is generated according to the movement of the laundry clothes 9 inside the drum 1. This vibration is detected by the vibration detector 11, and the result is transmitted to the frequency component calculator 12 shown in FIG. Here, the vibration detection unit 11 detects at least one vibration component of the upper, lower, left, and right of the receiving cylinder 2, and the detected acceleration in the direction is sent to the frequency component calculation unit 12 as a signal value, and then the rotational speed control is performed. Used as output to the unit 13.

The frequency component calculation unit 12 performs discrete Fourier transform (DFT) or fast Fourier transform (FFT) from the received acceleration value to calculate the magnitude of the frequency component (Fourier amplitude spectrum, power spectrum). The rotation speed control unit 13 can increase or decrease the number of rotations of the drum according to the size of the specific frequency component calculated by the frequency component calculation unit 12 or the sum of the frequency components, thereby improving the washing performance of the laundry. Become.

Here, in the case of the support structure as shown in FIG. 2, the movement of the laundry garment 9 is received with a specific cycle that occurs when the laundry 9 is placed in a tapping state that is effective for removing dirt during washing. The vibration from the cylinder 2 is alleviated by the elastic suspension portion 3 in the left-right direction, and is alleviated by the vibration-proof damper 4 in the up-down direction. Therefore, it becomes impossible to grasp the exact frequency component. Accordingly, in this case, the vibration in the front-rear direction reflects the movement of the laundry garment 9 moving inside the drum 1 with the least relaxation. Therefore, in the present embodiment, it is sufficient to attach an acceleration sensor of the vibration detection unit 11 that can detect only in the front-rear direction, but vibration in three axes (front-rear, left-right, up-down) can be detected, and the front and rear A configuration may be adopted in which only vibration in the direction is employed.

3A to 3C, as in the present embodiment shown in FIG. 2, the elastic suspension portion 3 that connects the receiving tube 2 and the upper portion of the housing 5 is in a symmetrical position with the center of gravity 14 on the central axis 16 as the center. The analysis result when the vibration from the receiving cylinder 2 is decomposed into each direction component in the supported state is shown. In FIG. 3A to FIG. 3C, cleaning evaluation was performed with the drum 1 rotating at 45 rpm and the weight of the laundry garment 9 being 2.0 kg. 3A is a graph showing the analysis result of the longitudinal component obtained from the vibration of the receiving cylinder 2, FIG. 3B is a graph showing the analysis result of the horizontal component, and FIG. 3C is the analysis result of the analytic component in the vertical direction. It is a graph which shows.

Further, the frequency peak as an index for controlling the rotation speed so as to improve the cleaning performance will be described with reference to FIG. The circle in FIG. 4 represents the opening of the drum 1, and the bottom surface is represented as 0 ° and the upper portion is represented as 180 °. Since rotation of the drum is reversed at 90 ° and 270 °, there is no problem even if reversed left and right. Now, in order to improve the cleaning performance, it is most suitable to tap the washing garment 9 with the baffle 10 (see FIG. 1) and drop it from the top (trajectory b). When the laundry clothes 9 sticks to the drum 1 and moves (trajectory c), or when the laundry clothes 9 rotate around the bottom of the drum 1 (trajectory a), it is unsuitable for improving the cleaning performance. is there.

In FIG. 4, it is optimal to improve the cleaning performance by dropping between 90 ° and 180 ° and colliding with the lower drum 1 surface. Therefore, in the present embodiment, a frequency component corresponding to a rotational speed different from the rotational speed of the drum 1 is detected, and the rotational speed of the drum 1 is controlled in accordance with the magnitude. Specifically, in the washing machine of the present embodiment, the rotation number obtained by multiplying the rotation number of the drum 1 by the number obtained by adding 1 to the number of the baffles 10, and the rotation number of the drum 1 from the number of the baffles 10. A large change in the frequency component of the rotational speed within the range of the rotational speed multiplied by the number obtained by subtracting 1 is detected. In the present embodiment, the number of rotations of the drum 1 is 45 rpm, and three baffles 10 are provided. Therefore, the amplitude component (amplitude spectrum) that appears when the frequency is between 45 × 2/60 = 1.5 Hz and 45 × 4/60 = 3.0 Hz is mainly a calculated value necessary for controlling the rotational speed.

As is apparent from the results of FIGS. 3A to 3C, in the results in the horizontal direction (FIG. 3B) and the vertical direction (FIG. 3C) other than the front-rear direction (FIG. 3A), the above frequency range (1.5 Hz to 3 Hz) as a whole. Many peaks are also observed in regions other than .0 Hz). That is, from the result of the frequency analysis in the left-right direction and the up-down direction, the change in the frequency component due to the characteristic movement of the laundry 9 is mixed between many peaks and cannot be observed. Therefore, it is difficult to grasp the state of clothing from these frequency patterns and control the rotational speed of the drum 1 based on the result. However, according to the result of frequency analysis in the front-rear direction, a large change in the frequency component can be observed. Therefore, the rotation speed of the drum 1 can be easily controlled based on this result.

As shown in the above description, in the washing condition where the laundry garment 9 shown in FIGS. 3A to 3C is 2.0 kg and the drum rotation speed is 45 rpm, the condition that the garment can be washed is a frequency of 1. 5 Hz to 3.0 Hz. If the frequency is less than 1.5 Hz, the laundry garment 9 rotates at the bottom and the laundry garment 9 is attached to the drum 1 at a frequency higher than 3.0 Hz.

Here, for each component in the vibration direction, the sum of the peak values for each specific frequency interval (for example, 0.15 Hz) in each frequency region is the peak value for each specific frequency interval (for example, 0.15 Hz) in all frequency regions. As a percentage of the total. As a result, when the vibration direction was the front-rear direction, the state of washing was 48%, the grooving state was 16%, and the sticking state was 36%. When the vibration direction was the left-right direction, the state of washing was 35%, the grooving state was 33%, and the sticking state was 32%. When the vibration direction was the vertical direction, the washing state was 36%, the grooving state was 39%, and the sticking state was 25%.

From this result, it can be judged that the vibration component in the front-rear direction largely reflects the signal of the washing state and can be clearly distinguished from signals in other areas. Therefore, even when the value fluctuates with time, it can be determined that the vibration component in the front-rear direction corresponds to the movement of the clothes in the drum.

In the control of the rotational speed of the drum 1 of the present embodiment, the control is performed so that the amplitude spectrum of the frequency component resulting from the washing is increased as described above. If there are many components with a frequency longer than the frequency component region (for example, 1.5 Hz to 3.0 Hz when the drum rotational speed is 45 rpm) due to the washing with a beat, the drum It is considered that the laundry garment 9 is attached to the wall surface of the drum 1 and is rotating without falling at the upper part of the drum 1. Therefore, it is predicted that the frequency of vibration applied to the drum 1 is reduced. Therefore, control is performed such that the laundry 1 is dropped from the wall surface of the drum 1 by reducing the rotation speed of the drum 1.

On the other hand, when there are many components with a frequency shorter than the frequency component region resulting from tapping (that is, a frequency region smaller than 1.5 Hz), the rotational speed of the drum 1 is slow and the weight of the wet laundry 9 is heavy. The baffle 10 cannot be lifted sufficiently against this, and the laundry garment 9 is considered to move while rotating around the bottom of the drum 1 as the drum 1 rotates. Therefore, it is predicted that the drum 1 is vibrated many times in a short time. Therefore, the rotational speed of the drum 1 is increased so that the laundry 9 is sufficiently lifted by the baffle 10 as the drum 1 moves.

By controlling the rotational speed of the drum 1 in this way, it is possible to drop the laundry garment 9 from a high position and realize tapping that enhances the cleaning performance.

As described above, the present embodiment includes a drum 1 that accommodates and rotates laundry, a receiving cylinder 2 that accommodates the drum 1, and an elastic suspension portion 3 that suspends the receiving cylinder 2 from above the housing 5. The vibration isolating damper 4 that supports the receiving tube 2 from below the housing 5, the motor 6 that rotates the drum 1, the vibration detecting unit 11 that detects the vibration of the receiving tube 2, and the vibration detected by the vibration detecting unit 11 A frequency component calculation unit 12 that calculates the frequency component, and a rotation speed control unit 13 that changes the rotation speed of the motor 6 according to the magnitude of the frequency component calculated by the frequency component calculation unit 12, and an elastic suspension unit 3 suspends the receiving tube 2 from a position symmetrical with respect to the rotation axis 16 of the drum 1, the vibration detecting unit 11 detects vibration in the front-rear direction of the receiving tube 2, and the rotational speed control unit 13 Calculated for vibration in direction Having the configuration of changing the rotational speed of the motor 6 according to the magnitude of the frequency component.

According to such a configuration, the clothes rotate with the rotation of the drum 1, and when the clothes are lifted and dropped from above, they collide with the lower drum and generate vibration. The elastic suspension part 3 suspends the receiving tube 2 from a position symmetrical with respect to the rotation axis 16 line of the receiving tube 2. For this reason, the movement of the receiving tube in the left-right direction is alleviated by the elastic force of the elastic suspension part 3, resulting in vibration unrelated to the movement of the clothing. Similarly, the movement of the receiving cylinder 2 in the vertical direction is also mitigated by the elastic force and damping force of the vibration damping damper 4. However, the vibration in the front-rear direction of the receiving tube 2 can be sufficiently detected without being buffered by the elastic suspension part 3 or the vibration damping damper 4.

This makes it possible to accurately grasp the vibration of the receiving cylinder 2 that is linked to the movement of clothing in the drum 1. Therefore, the optimal number of washing when washing is insufficient or when the clothes are rotating while the clothes are stuck to the drum, the number of rotations is controlled to maintain the optimum washing state when washing. A washing machine with excellent cleaning performance can be obtained.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. FIG. 5 is a schematic top view showing a support structure according to Embodiment 2 of the present invention. The same reference numerals are used for the same components as in the first embodiment, and description thereof is omitted.

In the present embodiment, unlike the first embodiment, as shown in FIG. 5, the elastic suspension part 3 that connects the receiving tube 2 and the upper part of the housing 5 includes a center of gravity point 14 on a substantially central axis 16. Alternatively, it is supported at a support point 15 on the central axis 16. In this case, the suspension is balanced with the vibration damping damper 4 that supports the lower portion of the receiving tube 2. Therefore, periodic vibration is generated according to the movement of the laundry clothes 9 inside the drum 1. Other configurations of the washing machine are the same as those in the first embodiment.

This vibration is detected by the vibration detector 11 and the result is transmitted to the frequency component calculator 12 in FIG. Here, the vibration detection unit 11 detects at least one vibration component of the upper, lower, left, and right of the receiving cylinder 2, and the detected acceleration in the direction is sent to the frequency component calculation unit 12 as a signal value, and then the rotational speed control is performed. Used as output to the unit 13. The frequency component calculator 12 performs discrete Fourier transform (DFT) or fast Fourier transform (FFT) from the received acceleration value to calculate the magnitude of the frequency component (Fourier amplitude spectrum, power spectrum). The rotational speed control unit 13 can improve the cleaning performance of the laundry garment 9 by increasing or decreasing the number of rotations of the drum according to the calculated magnitude of the specific frequency component and the sum of the frequency components.

In this embodiment, the elastic suspension part 3 suspends the receiving tube 2 from a position on the rotation axis 16 line of the drum 1 as shown in FIG. More specifically, the elastic suspension part 3 suspends the receiving tube 2 from the position of a plane including the rotation axis 16 line of the drum 1 and extending in the vertical direction. Here, the number of supporting portions of the elastic suspension part 3 may be one as shown in FIG. 5 or may be two in the front-rear direction at the position of the plane. It is not limited.

Here, in the case of the support structure of the present embodiment as shown in FIG. 5, the movement of the laundry garment 9 has a specific cycle that occurs when placed in a tapping state that is effective in removing dirt. The vibration from the receiving cylinder 2 is relieved by the elastic suspension part 3 in the front-rear direction, and is relieved by the vibration-proof damper 4 in the up-down direction. Therefore, in this case, the vibration in the left-right direction reflects the movement of the laundry 9 that is moving inside the drum 1 without being relaxed. Therefore, in the present embodiment, it is sufficient to attach an acceleration sensor of the vibration detection unit 11 that can detect only in the left-right direction. However, vibrations in three axes (front-rear, left-right, up-down) can be detected, and left and right of them can be detected. A structure that employs only vibration in the direction may be employed.

In addition, when the laundry 9 rotates with the drum 1 during washing and is struck from the upper part or rotates around, the vertical direction and the left and right are actually relative to the central axis 16 of the drum 1. In both directions, vibration is relatively greater than in the front-rear direction. Therefore, detecting the vibration in the left-right direction is advantageous in this case in order to grasp the movement of the laundry 9 in the drum 1. Therefore, in the case where the support structure is as shown in FIG. 5, the cleaning performance is enhanced by controlling the rotational speed of the drum using the vibration component in the horizontal direction of the receiving tube 2 as in the first embodiment. It becomes possible.

That is, when there are a lot of components having a frequency longer than the frequency component region caused by tapping, the rotation speed of the drum 1 is decreased to control the laundry 9 to drop from the drum 1 wall surface.

On the other hand, when there are many components having a frequency shorter than the frequency component region resulting from tapping, the rotational speed of the drum 1 is increased so that the laundry garment 9 is sufficiently lifted by the baffle 10 as the drum 1 moves. .

By controlling the rotational speed of the drum 1 in this way, it is possible to drop the laundry garment 9 from a high position and realize tapping that enhances the cleaning performance.

As described above, the present embodiment includes a drum 1 that accommodates and rotates laundry, a receiving cylinder 2 that accommodates the drum 1, and an elastic suspension portion 3 that suspends the receiving cylinder 2 from above the housing 5. The vibration isolating damper 4 that supports the receiving tube 2 from below the housing 5, the motor 6 that rotates the drum 1, the vibration detecting unit 11 that detects the vibration of the receiving tube 2, and the vibration detected by the vibration detecting unit 11 A frequency component calculation unit 12 that calculates the frequency component, and a rotation speed control unit 13 that changes the rotation speed of the motor 6 according to the magnitude of the frequency component calculated by the frequency component calculation unit 12, and an elastic suspension unit 3 suspends the receiving tube 2 from a position on the rotation axis 16 of the drum 1, the vibration detecting unit 11 detects left-right vibration of the receiving tube 2, and the rotational speed control unit 13 detects vibration in the left-right direction. Frequency calculated for Having the configuration of changing the rotational speed of the motor 6 in accordance with the divided size.

According to such a configuration, the clothes rotate with the rotation of the drum 1, and when the clothes are lifted and dropped from above, they collide with the lower drum 1 to generate vibration. The elastic suspension part 3 suspends the receiving tube 2 from a position on the rotation axis 16 line of the receiving tube 2. For this reason, the movement of the receiving tube 2 in the front-rear direction is alleviated by the elastic force of the elastic suspension part 3, and the vibration is not related to the movement of the clothes. Similarly, the movement of the receiving cylinder 2 in the vertical direction is also mitigated by the elastic force and damping force of the vibration damping damper 4. However, the vibration in the left-right direction of the receiving cylinder 2 can be sufficiently detected without being buffered by the elastic suspension part 3 or the vibration damping damper 4.

This makes it possible to accurately grasp the vibration of the receiving cylinder 2 that is linked to the movement of clothing in the drum 1. Therefore, when the optimal tapping washing is insufficient when washing, or when the clothes are rotating with the drum 1 attached to the drum 1, the number of rotations is controlled to maintain the optimum tapping washing state during washing. A washing machine with excellent cleaning performance can be obtained.

As described above, according to the present invention, the direction of the vibration component derived from the vibration of the receiving tube due to the movement of the laundry is determined by the difference in the support position of the receiving tube with respect to the housing. That is, the direction of the vibration component used for calculation value calculation in the frequency component calculation unit is determined. Accordingly, it is possible to accurately grasp the movement of the laundry in the drum, perform drum rotation control suitable for washing clothes, and improve the cleaning performance.

As described above, the washing machine of the present invention can improve the washing performance by controlling the rotation speed of the drum in accordance with the washing state of the clothes. This is widely applicable not only to a home-use washing machine but also to a washing / drying machine and a commercial washing machine.

DESCRIPTION OF SYMBOLS 1 Drum 2 Receptacle 3 Elastic suspension part 4 Anti-vibration damper 5 Case 6 Motor 7 Belt 8 Clothing input / exit port 9 Washing clothes (laundry)
DESCRIPTION OF SYMBOLS 10 Baffle 11 Vibration detection part 12 Frequency component calculation part 13 Rotational speed control part 14 Center of gravity point 15 Support point 16 Center axis (rotation axis)

Claims (4)

A drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, an elastic suspension that suspends the receiving cylinder from above the housing, and a vibration damper that supports the receiving tube from below the housing; A motor that rotates the drum, a vibration detection unit that detects the vibration of the receiving cylinder, a frequency component calculation unit that calculates a frequency component for the vibration detected by the vibration detection unit, and a calculation performed by the frequency component calculation unit A rotation speed control unit that changes the rotation speed of the motor according to the magnitude of the frequency component that is generated, and the elastic suspension unit suspends the receiving tube from a position symmetrical with respect to the rotation axis of the drum. The vibration detection unit detects vibration in the front-rear direction of the receiving cylinder, and the rotational speed control unit follows the magnitude of the frequency component calculated for the vibration in the front-rear direction. Washing machine for changing the rotational speed of the motor. The elastic suspension portion is a position on a plane including a center of gravity in a state where the drum and the receiving cylinder are combined, and is symmetrical from a plane including the rotation axis of the drum and extending in the vertical direction. The washing machine according to claim 1, wherein the receiving tube is suspended. A drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, an elastic suspension that suspends the receiving cylinder from above the housing, and a vibration damper that supports the receiving tube from below the housing; A motor that rotates the drum, a vibration detection unit that detects the vibration of the receiving cylinder, a frequency component calculation unit that calculates a frequency component for the vibration detected by the vibration detection unit, and a calculation performed by the frequency component calculation unit A rotation speed control unit that changes the rotation speed of the motor according to the magnitude of the frequency component that is generated, and the elastic suspension unit suspends the receiving tube from a position on the rotation axis of the drum, The vibration detection unit detects left-right vibration of the cylinder, and the rotational speed control unit detects the mode according to the magnitude of the frequency component calculated for the left-right vibration. Washing machine for changing the rotational speed. The washing machine according to claim 3, wherein the elastic suspension part suspends the receiving tube from a position of a plane including a rotation axis of the drum and extending in a vertical direction.

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