WO2024089938A1 - Lave-linge à tambour - Google Patents

Lave-linge à tambour Download PDF

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Publication number
WO2024089938A1
WO2024089938A1 PCT/JP2023/023895 JP2023023895W WO2024089938A1 WO 2024089938 A1 WO2024089938 A1 WO 2024089938A1 JP 2023023895 W JP2023023895 W JP 2023023895W WO 2024089938 A1 WO2024089938 A1 WO 2024089938A1
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Prior art keywords
outer tub
vibration damper
housing
vibration
tub
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PCT/JP2023/023895
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English (en)
Japanese (ja)
Inventor
瀛申 傅
優 金内
真 井村
真理 黒澤
康博 松井
昌 坂東
Original Assignee
日立グローバルライフソリューションズ株式会社
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Application filed by 日立グローバルライフソリューションズ株式会社 filed Critical 日立グローバルライフソリューションズ株式会社
Publication of WO2024089938A1 publication Critical patent/WO2024089938A1/fr

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis

Definitions

  • the present invention relates to a washing machine that washes clothes, and in particular to a drum-type washing machine with a horizontally positioned washing tub.
  • a drum-type washing machine is composed of an outer tub that holds water, a rotating drum that acts as a rotatable washing tub contained within the outer tub, and a housing that contains the outer tub and the rotating drum, and the outer tub is supported by vibration-proof structures such as vibration dampers and hanging springs from the housing.
  • the rotating drum is rotated at high speed to spin the clothes using centrifugal force, so if the distribution of clothes inside the rotating drum is uneven, vibrations will occur in the outer tub.
  • vibration dampers and suspension springs are used to suppress vibration of the outer tub.
  • vibration dampers that suppress vibration of the outer tub include those described in JP 2015-53947 A (Patent Document 1) and JP 5-84389 A (Patent Document 2).
  • the drum-type washing machine in Patent Document 1 comprises a first vibration damper disposed on the side in the direction in which the drum rotates, closer to the front than the center of gravity of the tub unit, and a second vibration damper disposed on the rear than the center of gravity of the tub unit, and the housing connection part to which the first and second vibration dampers are connected is attached to the washing machine housing via third cushioning material A and third cushioning material B.
  • the first and second vibration dampers, and third cushioning material A and third cushioning material B can also dampen vibrations of the tub unit in the front-back and left-right directions.
  • the drum-type washing machine in Patent Document 2 has a suspended water tub and a drum that rotates within the water tub, and is equipped with a pair of dampers that are installed between the bottom of the water tub and the washing machine body at an angle ⁇ between them and are inclined in the front-to-rear direction.
  • the pair of dampers also generate a damping force in the front-to-rear direction, suppressing vibration of the water tub.
  • vibration damper By increasing the damping performance of the vibration isolation mechanism (so-called vibration damper) that connects the outer tub to the housing, it is possible to suppress vibration of the outer tub at the rotation speed range where the outer tub resonates.
  • vibration isolation mechanism with high damping performance, the vibration of the outer tub is transmitted to the housing during high-speed rotation, causing the housing and the floor on which the drum washing machine is placed to vibrate. Since the vibration of the housing and the vibration of the floor on which the washing machine is placed can lead to discomfort for the user, it is necessary to simultaneously suppress the vibration of the outer tub and the vibration of the housing and the floor on which the washing machine is placed.
  • Patent Document 1 multiple vibration dampers are provided under the outer tub, and cushioning material is provided at the connection between the vibration dampers and the housing, suppressing vibration of the outer tub in the left-right, up-down, and front-back directions when viewed from the front of the washing machine.
  • the vibration damper is installed in a position that attenuates vibrations in the left-right and up-down directions of the outer tank, while vibrations in the front-back direction are mainly suppressed by the damping of the cushioning material.
  • This requires cushioning material with high damping performance, which may increase the vibrations transmitted to the housing and installation floor during high-speed rotation.
  • Patent Document 2 there are multiple vibration dampers attached to the bottom of the outer tub at an angle in the front-to-rear direction, and vibration in the outer tub is suppressed by damping the vibration in the front-to-rear direction.
  • the vibration dampers since the front-to-rear vibration mode during resonance of the outer tub is not taken into consideration, even if large vibration in the front-to-rear direction occurs due to the swinging movement of the outer tub, the vibration dampers cannot stroke widely, and conversely, there is a risk that a vibration damper with low damping performance cannot sufficiently dampen the vibration. Therefore, in order to suppress vibration in the front-to-rear direction, it is necessary to use a vibration damper with high damping performance, which, like Patent Document 1, may result in an increase in vibration transmitted to the housing and installation floor during high-speed rotation.
  • the object of the present invention is to provide a drum-type washing machine that can suppress vibrations in the front-to-rear direction of the outer tub and suppress an increase in vibrations transmitted to the housing and installation floor.
  • the present invention provides a drum-type washing machine including a housing, an outer tub supported within the housing and capable of storing wash water therein, a rotary drum contained within the outer tub and rotated by an electric motor, and a plurality of vibration dampers connecting a lower portion of the outer tub to a bottom of the housing,
  • a dividing line is imaginarily set in the direction of gravity passing through the center of the clothes insertion opening, at least one of the plurality of vibration dampers is
  • the rotating drum rotates counterclockwise during the dehydration operation, the drum is installed in the area to the left of the dividing line, and when the rotating drum rotates clockwise during the dehydration operation, the drum is installed in the area to the right of the dividing line.
  • the outer tub side mounting portion between one vibration damper and the outer tub is positioned closer to the clothing insertion opening when viewed in the axial direction of the outer tub
  • the housing side mounting portion between one vibration damper and the housing is positioned farther from the clothing insertion opening than the outer tub side mounting portion when viewed in the axial direction of the outer tub.
  • FIG. 1 is a perspective view of a drum-type washing machine to which the present invention is applied;
  • FIG. 2 is a cross-sectional view showing a vertical cross section illustrating an internal configuration of the drum type washing machine.
  • FIG. 4 is a chart showing a control pattern of the rotation speed of the rotating drum during a dehydration process.
  • 10A and 10B are explanatory diagrams illustrating changes in vibration phase in each vibration direction of the outer tank.
  • 11 is an explanatory diagram illustrating a vibration trajectory as viewed from the side of the clothes insertion opening of the outer tub.
  • FIG. FIG. 11 is an explanatory diagram illustrating the swinging motion of the outer tub.
  • FIG. 1 is a configuration diagram showing the outer tub as viewed from the front, illustrating the positional relationship between the outer tub, the housing, and the vibration damper according to an embodiment of the present invention.
  • FIG. 1 is a configuration diagram seen from the side of the outer tank to explain the positional relationship between the outer tank, the housing, and the vibration damper according to an embodiment of the present invention.
  • FIG. 4A to 4C are explanatory diagrams for explaining a first behavior of the vibration damper in the present embodiment.
  • 10 is an explanatory diagram for explaining a second behavior of the vibration damper in the present embodiment.
  • FIG. 1 is a perspective view of a drum-type washing machine 100 to which the present invention is applied
  • FIG. 2 is a side view showing the internal structure of the drum-type washing machine 100. Below, the general configuration and operation of the drum-type washing machine 100 will be explained using FIG. 1 and FIG. 2.
  • the housing 1 that constitutes the outer shell of the drum-type washing machine 100 shown in FIG. 1 is attached to a housing base 1a and is composed of left and right side panels 1b (only the right side panel is shown in FIG. 1), a front cover 1c, a rear cover 1d (see FIG. 2), a top cover 1e, and a lower front cover 1f.
  • the top cover 1e is provided with a water supply hose connection port 30 for supplying water from a water tap to the drum-type washing machine 100.
  • the door 2 is used to cover a clothing insertion opening (not shown) located approximately in the center of the front cover 1c for inserting and removing clothing, and is supported so as to be openable and closable by a hinge (not shown) provided on the front cover 1c.
  • the door 2 is opened by pulling the door opening handle 2a towards the user, which releases a locking mechanism (not shown), and is closed by pressing the door 2 against the front cover 1c.
  • the front cover 1c has a circular clothing insertion opening for inserting and removing clothing, approximately concentric with the clothing insertion opening of the outer tub 11 described below.
  • the operation and display panel 3 provided on the top of the housing 1 includes a power switch 4, an operation switch 5, and a display 6.
  • the operation and display panel 3 is electrically connected to a control unit 7 (see FIG. 2) provided on an upper reinforcing member 13 (see FIG. 2) provided on the top of the housing 1.
  • a cooling fan (not shown) is attached to the control unit 7.
  • the control unit 7 also includes a memory capable of recording the operation of the drum washing machine.
  • a drain hose 14 for draining water is attached near the housing base 1a.
  • the housing 1 of the drum-type washing machine 100 shown in FIG. 2 is provided with an outer tub 11 for storing water.
  • the upper part of the outer tub 11 is connected by two sets of suspension means 8 consisting of coil springs in order to maintain the position of the outer tub 11.
  • the lower part of the outer tub 11 is connected by a number of vibration dampers 24a-24d attached to the housing 1.
  • the connection parts between both ends of the vibration dampers 24a-24d and the outer tub 11 and housing 1 are attached in a state where they can swing in the vibration direction of the outer tub 11.
  • the number of vibration dampers 24 may be two or more, and the configuration is not limited. In this embodiment, there are four, as described above. Note that this embodiment is characterized by the arrangement of vibration dampers 24d, which are provided in a position closer to the door 2 side of the outer tub 11, when the door 2 side is the front. This will be explained using Figures 7A and 7B.
  • the outer tub 11 contains a rotating drum 21 for washing clothes.
  • An electric motor 22 for rotating the rotating drum 21 is provided at the rear of the outer tub 11.
  • the electric motor 22 has a shaft 22a that serves as the rotation axis, which passes through the outer tub 11 and is mechanically connected to the rotating drum 21.
  • the rotating drum 21 is driven to rotate in both forward (counterclockwise when viewed from the front of the door 2 of the drum type washing machine 100) and reverse (clockwise when viewed from the front of the door of the drum type washing machine 100).
  • the rotation axis Az of the rotating drum 21 shown in FIG. 2 is horizontal from the front to the rear on the door 2 side of the drum-type washing machine 100, or is inclined so that the rear side is downwards (FIG. 2 shows the rear side inclined so that the rear side is downwards).
  • the electric motor 21 is provided with a rotation speed detection device 10 that detects the rotation speed.
  • the inner circumferential surface of the rotating drum 21 is provided with a number of dewatering holes 21b for draining the washing water in the rotating drum 21 into the outer tub 11, and a number of baffles 23 (only one is shown in FIG. 2) spaced apart around the circumference of the rotating drum 21 for lifting clothes placed in the rotating drum 21.
  • the baffles 23 extend in the front-to-rear direction of the rotating drum 21.
  • a cylindrical fluid balancer 21c is provided at the front end (door 2 side) of the rotating drum 21.
  • the outer tub 11 is roughly cylindrical with an opening at the front and a closed rear, and has a bottom.
  • the clothes insertion opening of the outer tub 11 and the clothes insertion opening of the housing 1 are connected by a bellows 16 that easily expands and contracts in the front-to-rear direction.
  • the bellows 16 is an annular packing that seals the rotating drum 21 against water when the door 2 is closed.
  • the clothing insertion opening of the housing 1, the clothing insertion opening of the outer tub 11, and the clothing insertion opening of the rotating drum 21 are all connected to each other, and opening the door 2 makes it possible to put clothes in and take them out of the rotating drum 21.
  • the outer tub 11 can also be divided into a side that includes the clothing insertion opening and a side where the electric motor 22 is attached.
  • the drain port 19 provided at the bottom of the outer tub 11 is connected to the internal drain hose 14.
  • the lint collection box 17 is provided with a circulation pump 20 for circulating the wash water, and the wash water is sprayed into the rotating drum 21 via a circulation path 20a.
  • the external drain hose 15 is provided with a drain valve 15a, and water is stored in the outer tub 11 by closing the drain valve 15a and supplying water, and the water in the outer tub 11 is discharged outside the machine by opening the drain valve 15a.
  • the lower part of the outer tub 11 is provided with an outer tub vibration detection unit 18 that detects the vibration of the outer tub 11.
  • the vibration of the outer tub 11 exceeds a preset threshold, the rotation of the rotating drum 21 is temporarily stopped, the clothes are corrected, and the spin-drying process is restarted. Only when the vibration is below the threshold is the rotation speed of the rotating drum 21 increased to prevent excessive vibration.
  • the operation of the drum type washing machine 100 configured as above will be described.
  • the user first presses the power switch 4, which starts the drum type washing machine 100.
  • the user pulls the door opening handle 2a to open the door 2 and place the clothes into the rotating drum 21. After closing the door 2, the user operates the operation switch 5 to start operation.
  • the rotating drum 21 rotates to calculate the laundry volume before water is poured in.
  • the laundry volume is calculated based on the rotation speed and current value of the electric motor 22.
  • the greater the laundry volume the greater the load on the electric motor 22, and therefore the greater the current value, so the laundry volume is determined from the current value.
  • the amount of detergent to be added is displayed on the display 6 based on the laundry volume.
  • the greater the calculated laundry volume the greater the amount of detergent to be added.
  • the water supply valve 32 is opened, and water supplied from the water supply hose connection port 30 is supplied into the outer tub 11 together with detergent via the internal water supply hose 31 and detergent container 12.
  • the greater the calculated volume of clothes the greater the amount of water supplied in the washing process.
  • undissolved detergent and water are agitated in the circulation pump 20. This efficiently dissolves the detergent and produces a highly concentrated detergent solution.
  • a washing operation is performed for a predetermined time in which the rotating drum 21 is rotated forward, stopped, reversed, and stopped repeatedly. At this time, the clothes are lifted by the baffle 23 and dropped repeatedly, thereby washing the clothes.
  • FIG. 3 shows the control pattern of the rotation speed of the rotating drum 21 in the spin-drying process.
  • the rotation speed of the rotating drum 21 is increased to the target rotation speed range (t5-t6) while passing through a low rotation speed range (t1-t2) in which the clothes are spread and attached to the inner surface of the rotating drum 21, a resonance range (t2-t3) of the outer tub 11, a resonance range (t3-t4) of the housing 1, and a post-resonance range (t4-t5) of the housing 1, thereby centrifugally spinning off the moisture contained in the clothes.
  • the rotation speed of the rotating drum 21 is increased to ⁇ 0 (e.g., 50 r/min). At this time, clothes that have absorbed moisture during the washing process are lifted by the baffle 23 as the rotating drum 21 rotates, and as the clothes fall, they are spread out on the inner circumferential surface of the rotating drum 21.
  • ⁇ 0 e.g., 50 r/min
  • the rotating drum 21 is operated at ⁇ 0 for a time T1 (e.g., 10 seconds) in order to detect the uneven distribution of the clothes at ⁇ 0 .
  • Detection of uneven distribution of clothes in the low rotation speed range is determined based on the magnitude of rotation fluctuation.
  • the rotation fluctuation is calculated, for example, from the difference between the speed at which clothes are lifted from the bottom of the rotating drum 21 to the top (minimum speed) and the speed at which clothes are lowered from the top of the rotating drum 21 to the bottom (maximum speed) when the rotating drum 21 makes one rotation.
  • the smaller the rotation fluctuation the less uneven distribution of clothes can be confirmed.
  • the rotation speed of the rotating drum 21 is increased from ⁇ 0 to ⁇ 1 (e.g., 80 r/min).
  • ⁇ 0 and ⁇ 1 are rotation speeds for detecting the degree of adhesion of the clothes, with ⁇ 0 being the rotation speed at which the clothes start to adhere to the inner circumferential surface of the rotating drum 21 and ⁇ 1 being the rotation speed at which the clothes completely adhere to the inner circumferential surface of the rotating drum 21.
  • the rotation speed of the rotating drum 21 is increased to ⁇ 2 (e.g., 400 r/min) to pass through the resonance zone of the outer tub 11. If the vibration amplitude of the outer tub 11 is smaller than a predetermined value when passing through the resonance zone of the outer tub 11, the rotation speed of the rotating drum 21 is increased to ⁇ 3 (e.g., 600 r/min) to pass through the resonance zone of the housing 1.
  • the rotation speed of the rotating drum 21 is increased to a target (e.g., 900 r/min).
  • a target e.g., 900 r/min
  • the rotating drum 21 is operated for a predetermined time at T3 (e.g., 180 seconds), and then the rotation speed of the rotating drum 21 is decreased to 0 r/min (t6 to t7) to end the dehydration process.
  • the rinsing cycle is performed.
  • the water supply valve 32 is opened and tap water supplied from the water supply hose connection port 30 is supplied into the outer tub 11 via the water supply hose 31 and detergent container 12.
  • the greater the calculated laundry volume the greater the amount of water supplied.
  • the rotating drum 21 repeatedly rotates forward, stops, reverses, and stops. At this time, an agitation operation is performed for a predetermined period of time, in which the clothes lifted by the baffle 23 fall.
  • the operating time in the target rotation speed range for this final spin-drying process is set longer than that for the spin-drying process (e.g., 300 seconds).
  • Figure 4 shows the changes in the rotation speed of the rotating drum 21 and the vibration phase in each direction (up and down, left and right, front and back) in the resonance range of the outer tub (e.g., 100 r/min to 400 r/min).
  • vertical vibration means vibration in the direction of gravity in a plan view with the door 2 facing forward when the drum washing machine is installed on the installation floor of a house
  • left-right vibration means vibration in a direction perpendicular to the direction of gravity in a plan view with the door 2 facing forward
  • front-rear vibration means vibration in the direction in which the rotation axis Az (see Figure 2) of the rotating drum 21 extends, and also in the direction around the center of gravity.
  • the reference for the vibration phase is "0°" when the clothes are biased to the far right of the outer tub 11 (the right part that intersects with the X-X dividing line in Figure 5).
  • Figure 5 shows the vibration trajectory when the outer tub 11 is viewed from the front (clothing opening side) when a resonant mode of vibration in the front-to-rear direction occurs
  • Figure 6 shows the vibration trajectory when the outer tub 11 is viewed obliquely.
  • the clothing opening 11op is virtually divided into four areas, the "upper right area”, “lower right area”, “upper left area”, and “lower left area”, by a Y-Y dividing line in the vertical direction (gravity direction) that passes through the center C of the clothing opening 11op, and an X-X dividing line that is perpendicular to this and passes through the center C in the horizontal direction.
  • the clothing opening 11op is shown without showing related parts such as the bellows 16.
  • the phase difference between the left-to-right and up-to-down vibration phases of the outer tub 11 is significantly smaller than 90°; for example, in Figure 4, the phase difference is approximately 25°. Therefore, when the rotating drum 21 performs a spin-dry operation in the forward direction (left rotation), the outer tub 11 vibrates along an elliptical vibration locus that slopes upward to the right, spanning from the lower left region to the upper right region when viewed from the front of the clothing insertion opening 11op of the outer tub 11.
  • the upper right and lower left areas of the outer tub 11 were subjected to large swinging vibrations.
  • the upper right part of the upper right region and the lower left part of the lower left region at the front end side (the side where the clothes insertion opening 11op is formed) of the outer tub 11 oscillate widely back and forth, as shown in Fig. 6.
  • the rotating drum 21 performs a spin-drying operation in the reverse direction (clockwise rotation)
  • the upper left part of the upper left region and the lower right part of the lower right region at the front end side of the outer tub 11 oscillate widely.
  • this embodiment proposes a vibration damper arrangement that suppresses this swaying vibration.
  • a friction damper is used as the vibration damper
  • an oil damper filled with oil may also be used, and various other dampers may also be used as required.
  • Figures 7A and 7B show the arrangement of vibration dampers 24 (four dampers used) that suppress vertical and horizontal vibrations, including swaying vibrations, of the outer tub 11.
  • Figure 7A shows the configuration as seen from the side of the clothes insertion opening 11op on the front of the outer tub 11
  • Figure 7B shows the configuration as seen from the side of the outer tub 11.
  • Figure 7A shows the Y-Y dividing line in the vertical direction and the X-X dividing line perpendicular to this in the horizontal direction, just like Figure 5. Note that the following will explain the case where the rotating drum 21 is rotated in the forward direction.
  • two vibration dampers 24a, 24b are provided in the front-to-rear direction of the outer tub 11 along the axis of the outer tub 11 (corresponding to the rotation axis Az) in the lower right part of the lower right region of the outer tub 11.
  • the outer tub 11 can be divided into a front region and a rear region in the axial direction, with the center line Cc of the outer tub 11 shown in Figure 7B as the boundary.
  • the right front vibration damper 24a is attached to the front region of the outer tub 11, and similarly the right rear vibration damper 24b is attached to the rear region of the outer tub 11.
  • the vibration dampers 24a, 24b are attached in the same manner to the attachment parts (outer tank side attachment parts) 11a, 11b of the vibration dampers 24a, 24b to the outer tank 11, and to the attachment parts (casing side attachment parts) 1a, 1b of the vibration dampers 24a, 24b to the housing 1.
  • the vibration dampers 24a, 24b are attached in a state where they can oscillate mainly in response to vibrations in the left-right and up-down directions.
  • the mounting parts 11a, 11b of the outer tub 11 and the mounting parts 1a, 1b of the housing 1 are provided with a pair of flanges extending in a direction perpendicular to the axis of the outer tub 11, which sandwich both ends of the vibration dampers 24a, 24b. Both ends of the vibration dampers 24a, 24b are sandwiched between the pair of flanges and fixed in place by inserting bolts.
  • the vibration dampers 24a, 24b swing about the bolt in response to vibrations on a plane perpendicular to the axis of the outer tub 11.
  • the mounting angle of the right front vibration damper 24a relative to the horizontal is " ⁇ a”
  • the mounting angle of the right rear vibration damper 24b is " ⁇ b”
  • These mounting angles are appropriately selected depending on the direction and magnitude of the vibrations, mainly in the left-right and up-down directions.
  • two vibration dampers 24c, 24d are provided in the front-rear direction along the axis of the outer tub 11 (corresponding to the rotation axis Az) in the lower left part of the lower left region of the outer tub 11.
  • the left rear vibration damper 24c is attached to the rear region of the outer tub 11
  • the left front vibration damper 24d is attached to the front region of the outer tub 11, with the center line Cc of the outer tub 11 as the boundary in the axial direction.
  • the mounting portion (outer tank side mounting portion) 11c of the left rear vibration damper 24c to the outer tank 11 and the mounting portion (casing side mounting portion) 1c of the left rear vibration damper 24c to the housing 1 are attached in the same manner as the vibration dampers 24a and 24b described above.
  • the left rear vibration damper 24c is attached in a state where it can oscillate mainly in response to vibrations in the left-right and up-down directions.
  • the mounting part 11c of the outer tub 11 and the mounting part 1c of the housing 1 are provided with a pair of flanges extending in a direction perpendicular to the axis of the outer tub 11, which sandwich both ends of the vibration damper 24c. Both ends of the left rear vibration damper 24c are sandwiched between the pair of flanges and fixed in place by inserting bolts.
  • the vibration damper 24c This allows the vibration damper 24c to swing around the bolt in response to vibrations on a plane perpendicular to the axis of the outer tub 11.
  • the mounting angle of the left rear vibration damper 24c is " ⁇ c", and is set to a relationship of " ⁇ a ⁇ ⁇ b ⁇ ⁇ c". These angles are appropriately selected depending on the direction and magnitude of the vibrations, mainly in the left-right and up-down directions.
  • the left front vibration damper 24d is attached with its mounting direction rotated 90° relative to the left rear vibration damper 24c.
  • the mounting portion (outer tub side mounting portion) 11d of the left front vibration damper 24d to the outer tub 11 and the mounting portion (casing side mounting portion) 1d of the left front vibration damper 24d to the housing 1 are attached in a state rotated 90° relative to the mounting portions 11a-11c on the outer tub 11 side of the vibration dampers 24a-24c described above, and the mounting portions 1a-1c on the housing 1 side.
  • the left front vibration damper 24d is attached in a state where it can swing mainly in response to swinging vibrations in the front-to-rear direction.
  • the mounting part 11d of the outer tub 11 and the mounting part 1d of the housing 1 are provided with a pair of flanges extending in the axial direction of the outer tub 11 that sandwich both ends of the vibration damper 24d. Both ends of the vibration damper 24d are sandwiched between the pair of flanges and fixed by inserting a bolt. This allows the left front vibration damper 24d to swing around the bolt in response to the swaying vibration on a plane along the axis of the outer tub 11.
  • the mounting portion 11d on the outer tub 11 side and the mounting portion 1d on the housing 1 side are positioned as follows. As shown in FIG. 7B, the mounting portion 11d of the outer tub 11 is positioned closer to the clothing insertion opening 11op in the front area of the outer tub 11, and the mounting portion 1d of the housing 1 is positioned farther away from the clothing insertion opening 11op of the outer tub 11 than the mounting portion 11d. At this time, the mounting angle of the left front vibration damper 24d is " ⁇ d", and this angle is appropriately selected depending on the direction and magnitude of the vibration in the front-rear direction.
  • the left front vibration damper 24d which is inclined in the forward/rearward direction along the axis of the outer tub 11, can provide sufficient damping force to the swinging motion of the outer tub 11 and suppress forward/rearward vibration by being placed at the lower left rather than the lower right of the outer tub 11.
  • the resonance range of the housing 1 e.g., 450 r/min
  • the vibration of the outer tub 11 tends to converge to a constant value regardless of the arrangement of the vibration dampers 24a to 24d.
  • the vibration transmitted from the outer tub 11 to the installation floor depends on the damping performance of the vibration dampers 24a to 24d24, and converges to the same value regardless of the arrangement of the vibration dampers 24a to 24d.
  • vibrations in the front-back direction as well as the up-down and left-right directions of the outer tank 11 can be effectively suppressed, and vibrations transmitted to the installation floor can also be effectively suppressed.
  • the positioning of the left front vibration damper 24d, which is inclined in the front-rear direction along the axis of the outer tub 11, will be described.
  • the center of gravity 11g is described as being located at the rear of the center line Cc of the outer tub 11.
  • the electric motor 22 is located on the opposite side of the clothes insertion opening 11op of the outer tub 11, as shown in FIG. 2.
  • the oscillating vibration of the outer tub 11 is greater at positions farther away from the center of gravity 11g (closer to the clothing insertion opening), so the oscillating vibration is greater at the front than at the rear of the outer tub 11. Furthermore, when the clothes are biased towards the front of the rotating drum 21 (closer to the clothing insertion opening), the moment arm with respect to the center of rotation of the oscillating vibration is larger and the oscillating vibration is greater than when the clothes are biased towards the rear (closer to the electric motor) under the same conditions, so it is better to attach the attachment part 11d to the outer tub 11 at the front (closer to the clothing insertion opening).
  • Figures 8A and 8B show the relative positions of the outer tub 11 and the left front vibration damper 24d. We will explain the cases where the attachment part 11d is closer to the clothes insertion opening 11op relative to the center of gravity 11g of the outer tub 11, the cases where the attachment part 11d is closer to the center of gravity 11g of the outer tub 11, and the cases where it is located nearby.
  • the stroke dx of the left front vibration damper 24d increases according to the magnitude of the oscillating vibration of the outer tub 11, and the damping performance is exerted, so that the oscillating vibration of the outer tub 11 can be effectively suppressed.
  • the mounting portion 11d of the left front vibration damper 24d can be more effectively suppressed by locating it as close as possible to the clothing insertion opening 11op.
  • the mounting portion 11d of the left front vibration damper 24d is located between near the center of the front area of the outer tub 11 and the clothing insertion opening 11op of the outer tub 11, but most preferably at the clothing insertion opening 11op.
  • the left front vibration damper 24d is attached so that the mounting part 11d of the outer tub 11 is at the rear side of the outer tub 11 and the mounting part 1d of the housing 1 is at the front side of the outer tub 11, the left front vibration damper 24d will rotate mainly around the mounting connection part 11d, making it difficult to apply damping force to the oscillating movement. Therefore, it is preferable to attach the left front vibration damper 24d so that the mounting part 11d of the outer tub 11 is at the front side and the mounting part 1d of the housing 1 is at the rear side, as shown in Figures 8A and 8B.
  • the center of gravity 11g of the outer tub 11 may be located in front of the center line Cc of the outer tub 11.
  • the left front vibration damper 24d shown in FIG. 7B is replaced with the left rear vibration damper 24c, and the left rear vibration damper 24c is replaced with the left front vibration damper 24d.
  • the inclination direction of the left front vibration damper 24d is also reversed.
  • the vibration dampers 24a to 24c are installed with inclinations at angles ⁇ a to ⁇ c in the left-right direction (the horizontal plane is 0°), which makes it possible to suppress vibrations caused by resonance mainly in the left-right and up-down directions.
  • Anti-vibration damper 24c is provided on the left side of outer tub 11, and anti-vibration dampers 24a and 24b are provided on the right side, and are configured to support outer tub 11. As mentioned above, the lower left region of outer tub 11 vibrates more than the lower right region, so it is desirable to make the damping force of anti-vibration damper 24 stronger on the lower left side than on the lower right side.
  • the above-described arrangement of the vibration dampers 24 is an example and should not be considered limiting.
  • the front left vibration damper 24d inclined in the front-to-rear direction may be provided with multiple vibration dampers 24d rather than a single one.
  • the rear left vibration damper 24c may also be installed with an incline in the front-to-rear direction to increase the damping force of vibration in the front-to-rear direction, resulting in a configuration that further suppresses swaying vibration.
  • the present invention is not limited to the above-mentioned embodiments, but includes various modified examples.
  • the above-mentioned embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described.
  • it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace other configurations with respect to the configuration of each embodiment.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

L'invention concerne un lave-linge à tambour permettant de réduire à un minimum les éventuelles vibrations longitudinales d'une cuve, et de réduire à un minimum une éventuelle augmentation des vibrations transmises à un boîtier et à un plancher d'installation. Dans une vue en plan d'une ouverture de chargement de vêtements (11op) d'une cuve (11) par l'avant, lorsqu'une droite de séparation Y-Y est définie virtuellement dans la direction de la pesanteur et passant par le centre de l'ouverture de chargement de vêtements, au moins un amortisseur anti-vibrations (24d) d'une pluralité d'amortisseurs anti-vibrations (24) est installé dans la zone à gauche de la droite de séparation lorsque le sens de rotation d'un tambour rotatif (21) pendant l'opération d'évacuation de l'eau se fait dans le sens contraire des aiguilles d'une montre, et l'amortisseur anti-vibrations (24d) est installé dans la zone à droite de la droite de séparation lorsque le sens de rotation du tambour rotatif pendant l'opération d'évacuation de l'eau se fait dans le sens des aiguilles d'une montre. En outre, une partie de fixation côté cuve (11d) de l'amortisseur anti-vibrations (24d) et de la cuve (11) est disposée plus près de l'ouverture de chargement de vêtements lorsqu'elle est observée dans la direction axiale de la cuve, et une partie de fixation côté boîtier (1d) de l'amortisseur anti-vibrations (24d) et du boîtier est disposée plus loin de l'ouverture de chargement de vêtements (11op) que la partie de fixation côté cuve (11d) lorsqu'elle est observée dans la direction axiale de la cuve (11).
PCT/JP2023/023895 2022-10-28 2023-06-28 Lave-linge à tambour WO2024089938A1 (fr)

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JP2022-173148 2022-10-28
JP2022173148A JP2024064511A (ja) 2022-10-28 2022-10-28 ドラム式洗濯機

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009028290A (ja) * 2007-07-27 2009-02-12 Panasonic Corp 洗濯機
US20110023554A1 (en) * 2009-07-31 2011-02-03 Bsh Home Appliances Corporation Damping system for a household appliance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009028290A (ja) * 2007-07-27 2009-02-12 Panasonic Corp 洗濯機
US20110023554A1 (en) * 2009-07-31 2011-02-03 Bsh Home Appliances Corporation Damping system for a household appliance

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