JP6212716B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that performs a series of operations of washing, rinsing, and dehydrating laundry in a washing and dewatering tub that is rotatably disposed in an outer tub.

Conventionally, in this type of washing machine, a plate-like vibration absorber having a specific natural frequency is attached to the side wall of the washing machine main body, and the vibration period and vibration of the vibration absorber due to resonance of the side wall of the washing machine main body during steady dehydration The vibration of the side wall of the washing machine body was canceled by shifting the period by half wavelength. (For example, see Patent Document 1)
FIG. 11A is a side sectional view of a conventional washing machine described in Patent Document 1, and FIG. 11B shows a configuration of a dynamic vibration absorber attached to a side wall of a conventional washing machine. It is. As shown in FIGS. 11 (a) and 11 (b), the vibration absorber 3 has a plate-like vibrating portion 4 attached to the side wall 2 of the washing machine body 1 via an attachment base 5. The plate-like vibration part 4 has a specific resonance frequency. When the vibration period of the side wall 2 of the washing machine main body 1 in the steady state of the dehydration operation matches the vibration period of the resonance vibration of the vibration part 4, the vibration part 4. Vibrates with a half-wave shift from the vibration period of the side wall 2 of the washing machine body 1. Therefore, the vibration of the side wall 2 of the washing machine body 1 is canceled out, and the vibration of the side wall 2 of the washing machine body 1 is reduced.

  In addition, there has been a case in which a dynamic vibration absorber composed of a weight and an elastic part is attached to the upper part of the washing machine body to reduce the resonance vibration of the washing machine body (for example, see Patent Document 2).

  In addition, there is a heat pump device disposed on the upper portion of the washing machine main body, and the vibration of the washing machine main body is suppressed by the weight of the heat pump device (for example, see Patent Document 3).

JP-A-4-352994 JP 2006-204564 A JP 2011-133604 A

  However, in the conventional configuration, since the vibration part 4 as the vibration absorber 3 is attached to the side wall 2 of the washing machine main body 1, it is effective when only the side wall 2 of the washing machine main body 1 is resonantly vibrated. This is less effective for the resonant vibration mode in which the entire washing machine main body 1 generated at the start of operation swings greatly with the bottom of the washing machine main body as a fulcrum. In addition, since the elastic body of the mounting base 5 can be deformed in the horizontal, front-rear, and vertical directions, the vibration part 4 vibrates simultaneously in each direction, and the vibration damping capability is dispersed, which is a resonance vibration mode of the washing machine body 1. There has been a problem that the damping capacity is reduced with respect to lateral vibration. And the thing which suppresses vibration with the weight of the heat pump device arranged in the upper part of the washing machine main body has a problem that the center of gravity of the washing machine main body is upward and may promote vibration of the washing machine main body at resonance. It was.

  The present invention solves the above-mentioned conventional problems, and provides a washing machine that is provided with a vibration damping device that effectively cancels the resonance vibration that the entire washing machine body largely shakes horizontally, and suppresses the resonance vibration of the washing machine body. The purpose is to do.

In order to solve the conventional problems, a washing machine of the present invention includes an outer tub elastically supported in a washing machine body, a washing / dehydrating tub rotatably provided in the outer tub, and the washing / dehydrating tub. comprising a drive for rotating the dewatering tank, and a vibration suppression apparatus suppresses vibration before Washer body, the damping device includes a movable portion movable in the transverse direction of the washing machine body, the washing machine main body The base is fixed to the base and movably supports the moving part, the weight provided on the moving part, and inserted into the support hole provided on the base to move the supporting part elastically from below. and an elastic support portion for limiting, configured such that the resonant frequency of the vibration system composed of the moving portion and the elastic support portion having a front Kitsumu becomes resonant frequency or near the washing machine main body a is washing machine, the elastic support portion, holding the mobile portion A fixing part, at least one space part on each of the left and right sides of the fixing part, a holding part and a connection part sandwiched between the space parts, and the fixing part is connected to the holding part and the connection part. It is comprised so that it may be hold | maintained by the part .

  As a result, the vibration of the washing machine main body is provided by providing a vibration damping device that exerts a vibration damping capability in the lateral direction on the upper part of the washing machine main body against the resonance vibration in which the upper part of the washing machine main body vibrates in the horizontal direction during operation. Energy can be efficiently transmitted to the moving body, and the vibration energy of the washing machine body can be converted into energy that vibrates the moving part having the weight, effectively reducing the resonance vibration of the washing machine body during operation. it can.

  The washing machine according to the present invention is a vibration damping device that exhibits a vibration damping capability by canceling lateral vibration, which is a resonance vibration mode of the washing machine body, and an upper portion of the washing machine body in which the amplitude of the resonance vibration of the washing machine body is increased. By providing in, the resonance vibration of a washing machine main body can be reduced effectively.

Side surface sectional drawing of the washing machine in Embodiment 1 of this invention The top view of the state which removed the upper surface cover of the washing machine in this Embodiment 1. The principal part enlarged view of the vibration damping device vicinity of the washing machine in this Embodiment Front sectional drawing of the washing machine in Embodiment 2 of this invention The top view of the state which removed the upper surface cover of the washing machine in this Embodiment The top view of the state which removed the upper surface cover of the washing machine in Embodiment 3 of this invention (A) Main part enlarged view of the damping device of the washing machine in this Embodiment (b) AA sectional drawing of the damping device (A) The principal part enlarged view of the damping device of the washing machine in Embodiment 4 of this invention (b) BB sectional drawing of the damping device (A) The principal part enlarged view of the damping device of the washing machine in Embodiment 5 of this invention (b) CC sectional drawing of the damping device Side surface sectional drawing of the washing machine in Embodiment 6 of this invention (A) Side sectional view of a conventional washing machine (b) Configuration diagram of a vibration absorber of a conventional washing machine

A washing machine according to a first aspect of the present invention includes an outer tub elastically supported in a washing machine body, a washing / dehydration tub rotatably provided in the outer tub, and a drive device for rotating the washing / dehydration tub. comprises damping device and to suppress the vibration of the front Washer body, said vibration damping device, moving a movable portion movable, is fixed to the washing machine body to the movable portion in the lateral direction of the washing machine main body A base that can be supported; a weight provided in the moving part; and an elastic support part that is inserted into a support hole provided in the base and elastically supports the moving part from below to restrict movement. a, a said mobile unit and said elastic support portion and the washing machine in the resonance frequency of the vibration system formed is configured such that the resonant frequency or near the washing machine body in having a front Kitsumu,
The elastic support portion includes a fixed portion that holds the moving portion, at least one space portion on each of the left and right sides of the fixed portion, and a holding portion and a connection portion that are sandwiched between the space portions. The fixing portion is configured to be held by the holding portion and the connection portion .

As a result, the vibration of the washing machine main body is provided by providing a vibration damping device that exerts a vibration damping capability in the lateral direction on the upper part of the washing machine main body against the resonance vibration in which the upper part of the washing machine main body vibrates in the horizontal direction during operation. The energy can be efficiently transmitted to the moving part, and the vibration energy of the washing machine body can be converted into the energy to vibrate the moving part having the weight, effectively reducing the resonance vibration of the washing machine body during operation. it can.
In addition, the space provided in the elastic support part absorbs the displacement of the fixed part when the washing machine body vibrates and can move the moving part in the lateral direction, and the base and the moving part do not come into contact with each other. Therefore, there is no sliding sound, and the operation sound of the vibration control device can be reduced.

2nd invention has the reinforcement part which connects the upper part of the 1st side plate and 2nd side plate which oppose on the right and left of the said washing machine main body in the washing machine of 1st invention , The said damping device is The reinforcing portion is also configured to movably support the moving portion also serving as the base. Accordingly, the vibration damping device can be configured at a low cost by reducing the number of components without reducing the performance.

According to a third aspect of the present invention, in the washing machine of the first or second aspect , the connection portion is provided in the front-rear direction and is formed so that the height is greater than the width. As a result, the lateral rigidity of the viscoelastic support part is weaker than the longitudinal and vertical rigidity, and the elastic support part restricts the movement direction not only in the moving amount and moving speed of the moving part but also in the substantially horizontal direction. be able to. Therefore, the resonance frequency in the horizontal direction can be reliably separated from the resonance frequency in the front-rear and vertical directions, so that the vibration of the washing machine body that is the vibration in the horizontal direction can be reduced without the vibration damping capability of the vibration damping device being dispersed. It can be effectively reduced.

According to a fourth aspect of the present invention, in the washing machine according to any one of the first to third aspects, the vibration control device is provided with an intake / exhaust port through which the space portion is formed in a bag shape and air enters and exits the space portion. It is what was done. Thereby, when the moving part moves and the space part is deformed, air flows in or out from the intake / exhaust port, and the air flow resistance at this time becomes a damping force, and the damping force can be added to the vibration of the moving part. . And the frequency band of the resonant vibration of the horizontal direction of a moving part becomes wide, and it can respond even if the frequency of the resonant vibration of a washing machine main body shifts. In addition, the air flow resistance and damping force can be easily adjusted by changing the size and depth of the intake / exhaust port.

According to a fifth invention, in the washing machine according to any one of the first to fourth inventions, the vibration damping device is sealed so that the space portion does not circulate to the outside, and the plurality of spaces are formed in the connection portion. A passage communicating with each other is provided, and a working fluid is sealed inside. Thereby, when the moving part moves and the space part is deformed, the working fluid flows through the passage, and the flow resistance of the working fluid generated at this time becomes a damping force, and the damping force can be added to the vibration of the moving part. And the frequency band of the resonant vibration of the horizontal direction of a moving part becomes wide, and it can respond even if the frequency of the resonant vibration of a washing machine main body shifts.

According to a sixth aspect of the present invention, in the washing machine according to any one of the first to fifth aspects of the present invention, the washing machine further includes a heat pump device that circulates warm air to perform a drying operation, and the vibration damping device uses the weight of the heat pump device. It consists of components. As a result, existing parts can be used for the weight of the vibration damping device, and the vibration damping device can be configured at a lower cost. Also, since the heat pump device having a large mass is used for the weight, the vibration damping capability is increased. Therefore, the resonance vibration of the washing machine main body during operation can be reduced more effectively at a lower cost.

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

(Embodiment 1)
1 is a cross-sectional view of a washing machine according to Embodiment 1 of the present invention. FIG. 2 is a plan view of the washing machine according to the present embodiment with the top cover removed. FIG. 3 is an enlarged view of a main part in the vicinity of the vibration damping device of the washing machine in the present embodiment.

  1 to 3, a washing machine main body 30 includes an outer tub 33, a washing / dehydrating tub 34 provided in the outer tub 33 for storing objects to be cleaned such as clothes, and a washing / dehydrating tub 34. A drive device 35 that rotates and a vibration control device 43 that suppresses vibration of the washing machine body 30 are provided. The washing machine body 30 elastically supports the lower part of the outer tub 33 by two compression springs 31 and two dampers 32. A tension spring 31 a provided between the washing machine body 30 and the upper part of the outer tub 33 ensures the posture of the outer tub 33. The washing / dehydrating tub 34 is rotatably provided in the outer tub 33. The direction of the rotation axis of the washing and dewatering tub 34 is slightly inclined in the horizontal direction or the front side (left side in FIG. 1) of the washing machine body 30 upward as shown in FIG. The drive device 35 is composed of a brushless DC motor, and is controlled by an inverter so that the rotation speed can be freely changed. The driving device 35 is disposed below the outer tub 33 and rotates the washing / dehydrating tub 34 via a motor pulley 35a, a driving belt 35b, and a washing / dehydrating tub pulley 34a.

  The water supply device 36 is provided in the upper part of the washing machine main body 30 and supplies water into the outer tub 33 and the washing / dehydrating tub 34. The water level detection device 37 detects the water level of the washing liquid in the outer tub 33. The drainage device 38 is provided below the outer tub 33 and drains the washing liquid in the outer tub 33. The operation display device 40 for displaying the setting and setting contents of the driving course is provided at the upper part of the front surface of the washing machine body 30 (the left surface in FIG. 1), and the control device 39 is provided at the upper part in the washing machine body 30. It has been. The control device 39 controls the drive device 35, the water supply device 36, the drainage device 38, and the like based on the setting content input by the operation display device 40, and performs a series of operations of washing, rinsing, and dehydration.

  Both ends of the reinforcing portion 41 are fixed to the upper rear portions of the first side plate 30a and the second side plate 30b facing each other on the left and right of the washing machine body 30. The strength of the rear part of the washing machine body 30 is improved by connecting the upper portions of the first side plate 30 a and the second side plate 30 b with the reinforcing portion 41. The front reinforcement 42 is fixed at both ends of the front upper portion of the first side plate 30a and the second side plate 30b, and improves the strength of the front portion of the washing machine body 30.

  The vibration damping device 43 is fixed on the reinforcing portion 41 provided in the washing machine main body 30 and is disposed on the upper portion of the washing machine main body 30. The vibration damping device 43 is movable in a lateral direction (depth and near side in FIGS. 1 and 3 and up and down in FIG. 2) on the left and right sides of the washing machine body 30 and the movable unit 44 is movable. A base 45 to be supported, a weight 46 provided on the moving part 44, and an elastic support part 47 that elastically supports the moving part 44 and restricts the moving amount and moving speed of the moving part 44. . Specifically, the moving portion 44 has a protruding portion 44a on the bottom surface, and the protruding portion 44a fits into a concave portion 45a formed in the lateral direction on the base 45 and is smoothly stabilized in the lateral direction along the concave portion 45a. Slide. The base 45 is firmly fixed to the reinforcing portion 41 by a general method (not shown). The elastic support portion 47 elastically supports the moving portion 44 and limits the moving amount and moving speed of the moving portion 44. For this purpose, the elastic support part 47 has one end 47a fixed to the moving part 44 and the other end 47b fixed to the back plate 30c of the washing machine body 30 to connect the moving part 44 and the washing machine body 30 to each other. The horizontal movement of 44 deforms in the shear direction and exhibits elasticity.

The resonance frequency of the vibration system constituted by the moving part 44 having the weight 46 as the vibration damping device 43 and the elastic support part 47 is, for example, 8 Hz to 10 Hz or the vicinity of the resonance frequency of the washing machine body 30. It is set to resonate with the vibration of the washing machine body 30. The range near the resonance frequency is a range in which the vibration damping device 43 can resonate even a little near the resonance frequency to reduce the vibration of the washing machine body 30. In the present embodiment, rubber is used for the elastic support portion 47 as an elastic body with less vibration noise.

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

  After putting clothes and detergent into the washing and dewatering tub 34, the user operates the operation display device 40 to start operation of the washing machine. Accordingly, the control device 39 controls the water supply device 36 and supplies water into the outer tub 33. At the same time, the drive device 35 is controlled to start the rotation of the washing and dewatering tub 34. The control device 39 stops water supply when a specified amount of water is supplied. The detergent is dissolved in water by the rotation of the washing and dewatering tank 34 and becomes a washing liquid and penetrates into the clothes. The control device 39 rotates the washing / dehydrating tub 34 at a low speed of about 30 r / min, and performs washing for lifting and dropping clothes for a predetermined time based on the setting. After the washing is finished, the drainage device 38 is operated, and the washing liquid containing dirt is drained out of the outer tub 33.

  After the drainage is completed, the rotation of the washing and dewatering tank 34 is gradually increased. At this time, the clothes that are biased in the washing and dewatering tub 34 are vibrated to vibrate the outer tub 33. This vibration energy is transmitted through the compression spring 31, the damper 32, and the tension spring 31a, and the washing machine body 30 is vibrated. This vibration is generated in the circumferential direction of the rotating shaft of the washing / dehydrating tub 34. And since a rotating shaft is substantially horizontal, it generate | occur | produces mainly in a horizontal direction and an up-down direction, but since the vibration of an up-down direction is suppressed by the weight of the washing machine main body 30, especially a horizontal direction vibration becomes large.

  For example, in the present embodiment, when the rotation speed of the washing and dewatering tub 34 becomes 480 r / min to 600 r / min which is the resonance rotation speed of the washing machine body 30 at the start of the dehydration operation, the washing machine body 30 is moved in the horizontal direction. Resonance vibration. In this vibration mode, the amplitude of the upper part of the washing machine body 30 is maximized. Therefore, the resonance frequency of the vibration damping device 43 fixed to the reinforcing portion 41 is set at or near this vibration frequency. Therefore, the moving part 44 of the vibration damping device 43 slides and resonates in the lateral direction in the opposite phase due to the vibration of the washing machine body 30, and the vibration energy of the washing machine body 30 slides on the moving part 44 of the vibration damping device 43. The vibration of the washing machine body 30 is canceled and reduced.

  As described above, the vibration energy of the washing machine body 30 is converted into the kinetic energy of the moving unit 44 having the weight 46, so that the vibration energy of the washing machine body 30 is reduced and the vibration of the washing machine body 30 is reduced. . Further, since the moving unit 44 is configured to slide only in the lateral direction, the vibration damping ability of the vibration damping device 43 is prevented from being dispersed, and the vibration energy of the lateral vibration that is the resonance vibration mode of the washing machine body 30 is reduced. It can be absorbed efficiently. Furthermore, by providing the vibration damping device 43 on the upper part of the washing machine body 30, vibration energy of the washing machine body 30 can be efficiently transmitted to the moving unit 44, and vibration energy can be absorbed more effectively. .

  As described above, in the present embodiment, the vibration damping device 43 is fixed to the washing machine body 30, the moving unit 44 slides only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is configured to be. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

In the present embodiment, the moving unit 44 and the weight 46 of the vibration damping device 43 are separated from each other. However, they may be configured integrally. If constructed separately, the weight 46 can be replaced and the resonance frequency of the damping device 43 can be changed, but if constructed integrally, the number of components constituting the damping device 43 is reduced. The resonance vibration of the washing machine main body 30 can be reduced at a low cost.

  In the present embodiment, rubber is used for the elastic support portion 47 as an elastic body with less vibration sound. However, the elastic support portion 47 is not limited to this and may be an elastic body other than rubber. In addition to the elastic body, a viscoelastic body may be used. In the case of a viscoelastic body, for example, if the ratio of the mass of the washing machine body 30 to the mass of the weight 46 is 0.1, the damping ratio of the viscoelastic body is set to about 0.2, so that washing is performed in a wide range. The resonance vibration of the machine body 30 can be reduced. And even if the resonance frequency of the washing machine main body 30 shifts, it can cope with a wider range than the elastic body.

  Further, the vibration in the lateral direction is not limited to when the dehydrating operation is started, and the setting of the resonance frequency of the vibration control device 43 may be performed in accordance with an arbitrary operation state according to the operation characteristics of the washing machine.

(Embodiment 2)
FIG. 4 is a front sectional view of the washing machine in the second embodiment of the present invention. FIG. 5 is a plan view of the washing machine according to the present embodiment with the top cover removed. In the first embodiment, in the vibration damping device 43, the base 45 that slidably supports the moving portion 44 is fixed to the reinforcing portion 41. However, in the present embodiment, the reinforcing portion 41 supports the base 45. The difference is that the movable portion 44 is also movably supported.

  4 and 5, the vibration damping device 43 a includes a moving portion 44 having a weight 46, a protruding portion 48 provided on the bottom surface of the moving portion 44, and a left and right direction of the washing machine body 30 provided on the reinforcing portion 41. Are provided with long through holes 49. And while the protrusion part 48 is inserted in the through-hole 49, the stop component 50 which prevents the moving part 44 from removing is provided in the front-end | tip of the protrusion part 48, and slides to a horizontal direction. Other configurations are the same as those of the first embodiment.

  The operation of the washing machine configured as described above will be described below.

  For example, in the present embodiment, when the rotation speed of the washing and dewatering tub 34 becomes 480 r / min to 600 r / min which is the resonance rotation speed of the washing machine body 30 at the start of the dehydration operation, the washing machine body 30 is moved in the horizontal direction. Vibrates greatly. In this vibration mode, the vibration amplitude at the top of the washing machine body 30 is maximized. Therefore, the resonance frequency of the vibration damping device 43a including the reinforcing portion 41 is set at or near this vibration frequency. Therefore, the moving part 44 of the vibration damping device 43a slides and resonates in the lateral direction in the opposite phase due to the vibration of the washing machine body 30, and the vibration energy of the washing machine body 30 slides on the moving part 44 of the vibration damping device 43a. The vibration of the washing machine body 30 is canceled and reduced.

  As described above, in the present embodiment, the vibration damping device 43a is fixed to the washing machine body 30, the moving unit 44 slides only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is configured to be. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

  Furthermore, according to this configuration, the damping device 43a can be configured at a low cost by reducing the number of components without reducing the performance.

In the first embodiment, the moving portion 44 slides on the base 45 with the protruding portion 44a fitted into the concave portion 45a. In the second embodiment, the moving portion 44 moves on the reinforcing portion 41. 48 is configured to slide through the through hole 49, but the configuration for sliding the moving portion 44 is not limited to this. For example, the arrangement positions of the protrusion and the recess may be reversed up and down, a rail and a roller may be combined, or a lubricating material may be used for the sliding surface. In short, it is only necessary that the moving unit 44 is configured to smoothly and stably slide or move so as to resonate in response to the vibration of the washing machine body 30.

(Embodiment 3)
FIG. 6 is a plan view of the washing machine according to Embodiment 3 of the present invention with the top cover removed. Fig.7 (a) is a principal part enlarged view of the damping device of the washing machine in this Embodiment, and is the state seen from the downward direction. FIG.7 (b) is AA sectional drawing of the damping device of Fig.7 (a). 6 and 7 (a) and 7 (b), the vibration damping device 51 is provided on the reinforcing portion 41 serving as a base, the moving portion 44, the weight 46 provided on the moving portion 44, and the reinforcing portion 41. And a plurality of elastic support portions 53 inserted into the plurality of support holes 52 to support the moving portion 44 from below.

  The elastic support portion 53 has a cylindrical shape having a flange 53a at the upper portion and is made of an elastic body or a viscoelastic body. The fixing portion 54 is fitted into the central hole 53b. A bolt 56 that fixes the moving part 44 having the weight 46 is screwed to the fixing part 54, and the moving part 44 is held. In the present embodiment, four elastic support portions 53 are provided, and a fixing hole 44 b is provided in the moving portion 44 and a fixing hole 46 a is provided in the weight 46 so that the fixing bolt 56 passes therethrough.

  One arc-shaped space portion 55 is formed on each of the left and right sides of the fixing portion 54, and the fixing portion 54 is held by a holding portion 57 and a connection portion 58 sandwiched between the space portions 55. The space portion 55 is opened in the vertical direction of the elastic support portion 53, and can absorb the displacement of the fixing portion 54 when the washing machine body 30 vibrates and can move the moving portion 44 in the lateral direction. The connecting portion 58 is provided in the front-rear direction of the washing machine body 30 and is formed so that the height H is larger than the width W. With this configuration, the lateral rigidity of the elastic support portion 53 is weaker than the longitudinal and vertical rigidity, and the elastic support portion 53 moves not only in the moving amount and moving speed of the moving portion 44 but also in the moving direction only in the lateral direction. Limit. Accordingly, since the resonance frequency in the horizontal direction and the resonance frequency in the front-rear and vertical directions can be reliably separated, the vibration damping capability of the vibration damping device 51 is not dispersed, and the washing machine main body 30 that is the vibration in the horizontal direction is not dispersed. Resonance vibration can be effectively reduced.

  And the moving part 44 is fixed to the fixed part 54 with the bolt 56, and the lateral resonance frequency of the vibration system composed of the moving part 44 having the weight 46 and the elastic support part 53 is the resonance frequency of the washing machine body 30. For example, it is set so as to resonate with the vibration of the washing machine body 30 at or around 8 Hz to 10 Hz. Other configurations are the same as those of the first embodiment.

  The operation of the washing machine configured as described above will be described below.

  For example, in the present embodiment, when the rotation speed of the washing and dewatering tub 34 becomes 480 r / min to 600 r / min which is the resonance rotation speed of the washing machine body 30 at the start of the dehydration operation, the washing machine body 30 is moved in the horizontal direction. Vibrates greatly. In this vibration mode, the vibration amplitude at the top of the washing machine body 30 is maximized. Therefore, the resonance frequency of the vibration damping device 51 including the reinforcing portion 41 is set at or near this vibration frequency. Accordingly, the moving unit 44 of the vibration damping device 51 moves and resonates in the lateral direction in the opposite phase due to the vibration of the washing machine body 30, and the vibration energy of the washing machine body 30 vibrates the moving unit 44 of the vibration damping device 51. Therefore, the vibration of the washing machine body 30 is offset and reduced.

As described above, in the present embodiment, the vibration damping device 51 is fixed to the washing machine body 30, the moving unit 44 moves only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is comprised so that it may become. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

  Furthermore, according to this configuration, since the bottom surface of the moving part 44 is supported by the elastic support part 53, the reinforcing part 41 serving as the base does not come into contact with the moving part 44, so there is no sliding noise, and the vibration damping device 51 The operation sound can be reduced. Moreover, since the moving part 44 is attached to the reinforcement part 41 via the elastic support part 53, the elastic support part 47 which connects the moving part 44 and the back plate 30c of the washing machine body 30 can be eliminated, and it is inexpensive and reliable. A high vibration damping device 51 can be configured.

  In the present embodiment, the elastic support portion 53 has a cylindrical shape and the space portion 55 has an arc shape. However, the present invention is not limited to this, and may be a rectangular shape or other free shapes. Further, the number of the space portions 55 is not limited to one each on the left and right, and may be plural, but it is preferable that the displacement of the fixing portion 54 can be absorbed equally on the left and right. Further, although the position of the hole 53b into which the fixing portion 54 is fitted is set as the center, the hole 53b may be moved within a range in which the space portion 55 can be provided. Further, although the elastic support portions 53 are provided at four places, the number is not limited to this number. Further, depending on the state of vibration, there is only one elastic support portion, and other support portions do not use elastic bodies. Alternatively, the configuration may be such that only the moving direction is limited.

(Embodiment 4)
Fig.8 (a) is a principal part enlarged view of the damping device of the washing machine in Embodiment 4 of this invention, and is the state seen from the downward direction. FIG.8 (b) is BB sectional drawing of the damping device of Fig.8 (a). 8A and 8B, the vibration damping device 51a is different from the vibration damping device 51 of the third embodiment in the configuration of the space portion 55 of the elastic support portion 53. Although the space portion 55 of the third embodiment is open at the top and bottom, the space portion 59 of the present embodiment is formed in a bag shape, and air intake / exhaust ports 59a through which air enters and exits the lower portions of the two space portions 59 are provided. Is provided.

  With this configuration, when the moving portion 44 having the weight 46 moves and the two space portions 59 are deformed, air flows into the one enlarged space portion 59 from the intake / exhaust port 59a, and the other reduced space portion. The air flows out from the intake / exhaust port 59 a to 59. The air flow resistance at this time becomes a damping force, and the damping force is added to the vibration system composed of the moving portion 44 and the elastic support portion 53. Further, the air flow resistance and damping force can be easily adjusted by changing the size and depth of the intake / exhaust port 59a.

  The lateral resonance frequency of the vibration system composed of the moving portion 44 having the weight 46 and the elastic support portion 53 is, for example, 8 Hz to 10 Hz, which is the resonance frequency of the washing machine body 30, or the vicinity thereof. It is set to resonate with 30 vibrations. Other configurations and operations are the same as those in the third embodiment.

  As described above, in the present embodiment, the vibration damping device 51a is fixed to the washing machine body 30, the moving unit 44 moves only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is comprised so that it may become. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

  Further, according to this configuration, when the resonance frequency is set by the elastic support portion 53, in addition to selection of an elastic body or a viscoelastic body as a material of the elastic support portion 53, adjustment by the intake / exhaust port 59a is also possible. . Further, the frequency band of the resonance vibration in the lateral direction of the moving unit 44 that can cope with the damping force of the air flow resistance is widened, so that it is possible to cope with the deviation of the resonance frequency of the washing machine body 30.

(Embodiment 5)
Fig.9 (a) is a principal part enlarged view of the damping device of the washing machine in Embodiment 5 of this invention, and is the state seen from the downward direction. FIG.9 (b) is CC sectional drawing of the damping device of Fig.9 (a). 9 (a) and 9 (b), the vibration damping device 51b differs from the vibration damping device 51a of the fourth embodiment in the configuration of the space portion 59 of the elastic support portion 53. The first space 60 and the second space 61 are assumed. Although the space 59 of the fourth embodiment is configured in a bag shape and has an intake / exhaust port 59a through which air enters and exits, a first space 60 and a second space 61 of the present embodiment are formed. Is hermetically sealed at both the top and bottom to prevent circulation to the outside. Further, a connecting portion 58 that partitions the first space portion 60 and the second space portion 61 is provided with a passage 63 that communicates the two space portions, and a liquid working fluid 62 is sealed inside.

  With this configuration, if the moving part 44 having the weight 46 moves, and the first space part 60 is reduced and the second space part 61 is enlarged, for example, the working fluid 62 inside passes through the passage 63. To move from the first space portion 60 to the second space portion 61. The flow path resistance through which the working fluid 62 flows through the passage 63 at this time becomes a damping force, and the damping force is added to the vibration system constituted by the moving portion 44 and the elastic support portion 53.

  The lateral resonance frequency of the vibration system composed of the moving portion 44 having the weight 46 and the elastic support portion 53 is, for example, 8 Hz to 10 Hz, which is the resonance frequency of the washing machine body 30, or the vicinity thereof. It is set to resonate with 30 vibrations. Other configurations and operations are the same as those in the third embodiment.

  As described above, in the present embodiment, the vibration damping device 51b is fixed to the washing machine body 30, the moving unit 44 moves only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is comprised so that it may become. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

  Further, according to this configuration, the frequency band of the resonance vibration in the lateral direction of the moving unit 44 is widened, and it is possible to cope with the deviation of the frequency of the resonance vibration of the washing machine body 30. If the working fluid 62 is incompressible, only the damping force is generated without generating a spring component due to the deformation of the first space portion 60 and the second space portion 61. The lateral resonance frequency of the vibration system constituted by the portion 53 is not greatly affected. And since there is no air supply / exhaust sound which air distribute | circulates with the exterior, the operating sound of the damping device 51b can be reduced.

  Although the liquid working fluid 62 is used in the present embodiment, the liquid is not particularly limited. Further, not only liquid but also gas such as air can be used although it has a certain degree of compressibility.

(Embodiment 6)
FIG. 10 is a side sectional view of the washing machine in the sixth embodiment of the present invention. In FIG. 10, the washing machine further includes a heat pump device 65 that performs a drying operation by circulating hot air. The heat pump device 65 accommodates a compressor 65b, a heat exchanger 65c, a blower fan 65d, and a filter 65e inside a heat pump case 65a. The heat pump device 65 is connected to the outer tub 33 by an ejection duct 66 and a suction duct 67. As a result, warm air is blown into the outer tub 33 from the ejection duct 66, and moist air after drying the laundry 68 is sucked in from the suction duct 67, and foreign matters such as dust are removed by the filter 65e. The hot air dehumidified and heated in 65c is blown out again and blown into the outer tub 33 from the duct 66 to circulate drying air in the direction of the arrow, thereby drying the laundry 68 inside the outer tub 33. doing.

  The vibration damping device 64 includes a heat pump device 65 that uses a weight for drying the laundry 68. The heat pump device 65 constitutes a weight and a moving part together with the heat pump case 65a, and is attached to the reinforcing part 41 with bolts 56 at a plurality of positions via an elastic support part 53. And the resonance frequency of the vibration system comprised by the heat pump apparatus 65 and the elastic support part 53 is set to the resonance frequency of the washing machine main body 30, for example, 8 Hz-10 Hz, or its vicinity.

  The compressor 65b and the heat exchanger 65c are supported in a vibration-proof manner in the heat pump case 65a, and the resonance frequency thereof is set to a frequency higher than the resonance frequency of the washing machine body 30. The heat pump device 65 vibrates greatly when the machine body 30 resonates. However, since the compressor 65b and the heat exchanger 65c vibrate in the same phase as the heat pump device 65, a refrigerant circulation pipe 69 connecting the compressor 65b and the heat exchanger 65c. It will not be damaged by vibration load. Other configurations and operations are the same as those of the third embodiment.

  As described above, in the present embodiment, the vibration damping device 64 is fixed to the washing machine body 30, the moving unit 44 moves only in the lateral direction, and the resonance frequency is at or near the resonance frequency of the washing machine body 30. It is comprised so that it may become. Therefore, the vibration energy of the transverse vibration which is the resonance vibration mode of the washing machine main body 30 can be efficiently absorbed, and in particular, the resonance vibration of the washing machine main body 30 at the start of the dehydration operation is offset to greatly reduce the vibration. The dehydration operation can be started with little quietness.

  Furthermore, according to this configuration, the mass of the heat pump device 65 is about 8 kg, and when the heat pump device 65 vibrates with an amplitude of 2 mm to 3 mm, the amplitude of the resonance vibration of the washing machine body 30 can be reduced to less than half, for example, about 1 mm. it can. Thereby, the existing components can be used for the weight of the vibration damping device 64, the installation space can be used effectively, and the vibration damping device 64 can be configured at low cost. Furthermore, since the heat pump device 65 having a large mass is used as a weight, the vibration damping capability is increased, and the resonance vibration of the washing machine body 30 can be reduced more effectively at a lower cost.

  In the present embodiment, all the components of the heat pump device 65 are substituted for the weight. However, not all the components are necessary, and some components of the heat pump device 65 can be appropriately adjusted so as to be used for the weight. Moreover, it does not prevent using the weight for adjustment according to required mass. The same effect can be obtained even if the heat pump device 65 is a drying device using an electric heater.

  As described above, the washing machine according to the present invention is provided with a vibration damping device in the washing machine body to cancel and reduce the resonance vibration during operation. It can be applied to reduce the resonance vibration of the main body.

DESCRIPTION OF SYMBOLS 30 Washing machine main body 30a 1st side plate 30b 2nd side plate 31 Compression spring 31a Tension spring 32 Damper 33 Outer tank 34 Washing and dehydration tank 35 Drive apparatus 41 Reinforcement part 43, 43a Damping apparatus 44 Moving part 44a Protrusion part 45 Base 45a Concave part 46 Weight 47 Elastic support part 48 Projection part 49 Through hole 50 Stop part 51, 51a, 51b Damping device 52 Support hole 53 Elastic support part 54 Fixing part 55 Space part 57 Holding part 58 Connection part 59 Space part 59a Intake and exhaust Port 60 First space portion 61 Second space portion 62 Working fluid 63 Passage 64 Damping device 65 Heat pump device

Claims (6)

An outer tub which is resiliently supported in the washing machine body, and washing and drying tub rotatably provided in the outer tub, and a driving device for rotating the washing and dewatering tank, a vibration before Washer body A damping unit that suppresses the moving unit in a lateral direction of the washing machine body, a base that is fixed to the washing machine body and supports the moving unit so as to be movable, and the movement. has a weight provided in the part, and an elastic support portion which is inserted into the support hole provided in said base to restrict movement and supported from below said moving portion elastically, said having a leading Kitsumu A washing machine configured such that a resonance frequency of a vibration system constituted by a moving part and the elastic support part is at or near the resonance frequency of the washing machine body ,
The elastic support portion includes a fixed portion that holds the moving portion, at least one space portion on each of the left and right sides of the fixed portion, and a holding portion and a connection portion that are sandwiched between the space portions. The washing machine is configured such that the fixing part is held by the holding part and the connection part . The first and second side plates facing the left and right of the washing machine main body have a reinforcing portion that connects upper portions of the second side plate, and the vibration control device includes the reinforcing portion that serves as the base and the moving portion. The washing machine according to claim 1, wherein the washing machine is configured to be movably supported. The washing machine according to claim 1 or 2 , wherein the connection portion is provided in the front-rear direction and is formed to have a height larger than a width. The washing machine according to any one of claims 1 to 3, wherein the vibration control device has the space portion formed in a bag shape, and an intake / exhaust port through which air enters and exits the space portion. The vibration damping apparatus, the space portion is sealed such that there is no circulation of the outside, the plurality of space portions in the connecting portion of claims 1, passage provided with working fluid therein is enclosed communicating The washing machine according to any one of 4 . The washing machine according to any one of claims 1 to 5 , further comprising a heat pump device that circulates warm air to perform a drying operation, wherein the vibration control device includes the weight as a component of the heat pump device.

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