WO2014147931A1 - Machine à laver - Google Patents

Machine à laver Download PDF

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Publication number
WO2014147931A1
WO2014147931A1 PCT/JP2014/000324 JP2014000324W WO2014147931A1 WO 2014147931 A1 WO2014147931 A1 WO 2014147931A1 JP 2014000324 W JP2014000324 W JP 2014000324W WO 2014147931 A1 WO2014147931 A1 WO 2014147931A1
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WO
WIPO (PCT)
Prior art keywords
washing
compression coil
laundry
coil spring
vibration
Prior art date
Application number
PCT/JP2014/000324
Other languages
English (en)
Japanese (ja)
Inventor
東山　義幸
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2014147931A1 publication Critical patent/WO2014147931A1/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
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical axis
    • 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
    • D06F37/24—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 vertical axis

Definitions

  • the present invention relates to a washing machine having a water tank supported by an outer frame in a vibration-proof manner.
  • Patent Document 1 In a conventional washing machine, there has been proposed one that reduces vibration of a water tank that is supported in a vibration-proof manner inside the outer frame (see, for example, Patent Document 1).
  • FIG. 3 is a view showing a longitudinal section of a conventional washing machine 200
  • FIG. 4 is a sectional view showing a main part of a vibration isolator of the conventional washing machine 200.
  • the conventional washing machine includes a water tank 120 that is elastically suspended from the upper part of the outer frame 128 via a suspension 129.
  • a power transmission mechanism 121 is fixed to the bottom of the water tank 120.
  • the power transmission mechanism 121 is connected to a motor 122 provided on the outer bottom portion of the water tank 120 via a belt.
  • a stirring blade 124 that is rotatably provided at the inner bottom portion of the washing and dewatering tub 126 is fixed.
  • a washing and dewatering tub 126 located in the water tub 120 is connected to the outer shaft 125.
  • a fluid balancer 127 for reducing vibration is provided at the upper part of the washing and dewatering tank 126.
  • the suspension 129 includes a suspension rod 130, a slider 131, a vibration isolation spring 132, and a spring support plate 133.
  • a hemispherical suspension rod support part 134 is provided on the upper part of the outer frame 128.
  • a sliding restriction wall 136 is provided on the outer periphery of the suspension rod support portion 134. The sliding regulation wall 136 is placed on the suspension rod support portion 134 and regulates the sliding range of the suspension rod support base 135 that slides on the spherical surface.
  • the water tank 120 tends to vibrate greatly due to the unbalanced state of the clothes that are offset in the washing and dehydrating tank 126 in the washing process.
  • the suspension rod support base 135 is restricted in movement by the sliding restriction wall 136 provided on the outer periphery of the suspension rod support portion 134. Thereby, the lateral vibration of the water tank 120 is reduced.
  • the present invention solves the conventional problems, and provides a vibration isolator capable of stably suppressing vibrations at the time of resonance of a vibration system, particularly vibrations in the vertical direction, regardless of whether the laundry is light or heavy. It is an object to provide a washing machine having the same.
  • a washing machine includes a washing / dehydrating tub for storing laundry, a water tub containing the washing / dehydrating tub, a vibration system including a vibration isolator for supporting the water tub on an outer frame, and an outer frame.
  • the vibration isolator has a suspension including a compression coil spring.
  • a compression coil spring has a long pitch part located in the center part of a compression coil spring, and a short pitch part located in the both ends of a compression coil spring.
  • the maximum amplitude in the vertical direction when the vibration system resonates when there is no laundry in the washing / dehydrating tub is when the laundry is contained in the washing / dehydrating tub It is larger than the maximum amplitude in the vertical direction during resonance of the vibration system.
  • FIG. 1 is a view showing a longitudinal section of a washing machine according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a main part of the suspension of the washing machine in the embodiment of the present invention.
  • FIG. 3 is a view showing a longitudinal section of a conventional washing machine.
  • FIG. 4 is a cross-sectional view showing a main part of a conventional vibration isolator of a washing machine.
  • FIG. 1 is a view showing a longitudinal section of a washing machine 100 according to an embodiment of the present invention.
  • the washing machine 100 includes an outer frame 1, a water tank 2, a washing and dewatering tank 3, a motor 7, a support bar 8, and a suspension 9.
  • the water tank 2 is supported by an anti-vibration device 19 including a support bar 8 and a suspension 9 from the corners of the outer frame 1.
  • a washing / dehydrating tub 3 having a large number of small holes 6 for draining water is provided in the water tub 2 so as to be rotatable.
  • the washing / dehydrating tub 3 includes a pulsator 4 for stirring clothes at the bottom of the center and a fluid balancer 5 for reducing dehydration vibration at the top.
  • the motor 7 is provided on the outer bottom of the water tank 2.
  • the motor 7 rotates the pulsator 4 during the washing process and the rinsing process, and rotates the washing / dehydrating tub 3 during the dehydration process.
  • a lid 12 that covers the laundry input port 11 so as to be openable and closable is provided at a substantially central portion of the upper frame 10 provided on the upper part of the outer frame 1.
  • FIG. 2 is a cross-sectional view showing a main part of the suspension 9 of the washing machine 100 according to the embodiment of the present invention.
  • the suspension 9 has a cap 13 disposed at the lower end of the support bar 8, and the support bar 8 passes through the center of the cap 13. Further, the suspension 9 is provided with a slider 14. The slider 14 is in frictional contact with the cap 13 at the inner peripheral portion of the slider 14, and a damper force is generated. An air hole 15 is provided in the upper part of the slider 14. As the slider 14 moves up and down, air escapes and enters the air hole 15, thereby exhibiting a viscous damping effect.
  • the suspension 9 includes an unequal pitch compression coil spring 16 positioned between the upper surface of the cap 13 and the inner upper surface of the slider 14.
  • Short pitch portions 17 are formed at both ends of the compression coil spring 16.
  • a long pitch portion 18 is formed in the central portion of the compression coil spring 16 in a range of about 1 ⁇ 2 of the total number of turns.
  • the vertical vibration of the entire vibration system including the water tank 2 supported by the outer frame 1 and the vibration isolator 19 is considered to be a forced vibration with damping.
  • the maximum amplitude A when the rotational speed of the dehydration reaches the resonance point of the vibration system is approximately expressed by (Equation 1) when the attenuation is considered to be small to some extent.
  • f is a force applied to the suspension 9 including the compression coil spring 16
  • k is a spring constant of the compression coil spring 16
  • ⁇ is a damping coefficient.
  • ⁇ c is a critical damping coefficient and is expressed by (Equation 2).
  • amplitude A 1 is represented by equation (4).
  • M is the weight of the unbalance
  • r is the distance from the center of rotation of the unbalance
  • (k / m) 1/2 is the angular velocity at the time of resonance
  • y is the ratio that the centrifugal force generated during the unbalance is applied to the suspension.
  • a 2 is A 1 or more.
  • the maximum amplitude in the vertical direction during resonance when the laundry is contained is equal to or greater than the maximum amplitude in the vertical direction during resonance when the laundry is not contained.
  • the vibration system reaches the bottom dead center, and a loud collision sound is emitted when the spring is in close contact.
  • the washing machine may move due to the impact force.
  • the washing machine 100 includes the washing / dehydrating tub 3 that accommodates the laundry, the water tub 2 that encloses the washing / dehydrating tub 3, and the vibration isolation that supports the water tub 2 on the outer frame 1.
  • a vibration system including the device 19 and the outer frame 1 are provided.
  • the vibration isolator 19 has a suspension 9 including a compression coil spring 16.
  • the compression coil spring 16 has a long pitch portion 18 located at the center of the compression coil spring 16 and a short pitch portion 17 located at both ends of the compression coil spring 16.
  • the spring constant of the compression coil spring 16 is k 1
  • the weight supported by the suspension 9 is m 1
  • the laundry is placed in the washing / dehydrating tub 3.
  • the spring constant of the compression coil spring 16 k2 the recommended weight for suspension 9 is supported upon a m 2, satisfy (k 2 / k 1) ⁇ (m 2 / m 1).
  • the spring constant of the long pitch portion 18 is larger than the spring constant of the short pitch portion 17.
  • the length of the long pitch portion 18 is 1 ⁇ 2 of the length of the compression coil spring 16.
  • the washing machine according to the present invention can stably suppress vibration at the time of resonance of the vibration system, in particular, vibration in the vertical direction, regardless of the weight of the laundry. Abnormal vibration can be suppressed. Therefore, the present invention can be applied to other types of washing machines having a vibration system supported by vibration isolation.

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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 une machine à laver (100) qui comprend : un système de vibration qui comporte une cuve de lavage et d'essorage (3) qui contient le linge, une cuve d'eau (2) qui entoure la cuve de lavage et d'essorage (3), et un dispositif d'amortissement de vibration (19) qui soutient la cuve d'eau (2) dans un cadre extérieur (1) ; et le cadre extérieur (1). Le dispositif d'amortissement de vibration (19) a une suspension (9) qui comprend un ressort hélicoïdal de compression (16). Le ressort hélicoïdal de compression (16) a une partie pas allongé (18) au niveau de la partie centrale du ressort hélicoïdal de compression (16), et des parties pas court (17) aux deux extrémités du ressort hélicoïdal de compression (16). Lorsque le système de vibration réalise une vibration qui comprend la direction verticale, l'amplitude maximale dans la direction verticale à un temps de résonance du système de vibration, s'il n'y a pas de linge dans la cuve de lavage et d'essorage (3), est supérieure à l'amplitude maximale dans la direction verticale à un temps de résonance du système de vibration s'il y a du linge dans la cuve de lavage et d'essorage (3).
PCT/JP2014/000324 2013-03-22 2014-01-23 Machine à laver WO2014147931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-059511 2013-03-22
JP2013059511A JP2014183889A (ja) 2013-03-22 2013-03-22 洗濯機

Publications (1)

Publication Number Publication Date
WO2014147931A1 true WO2014147931A1 (fr) 2014-09-25

Family

ID=51579638

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/000324 WO2014147931A1 (fr) 2013-03-22 2014-01-23 Machine à laver

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JP (1) JP2014183889A (fr)
WO (1) WO2014147931A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160010259A1 (en) * 2014-07-11 2016-01-14 Lg Electronics Inc. Washing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7170172B2 (ja) * 2018-12-21 2022-11-14 パナソニックＩｐマネジメント株式会社 洗濯機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04144594A (ja) * 1990-10-03 1992-05-19 Matsushita Electric Ind Co Ltd 洗濯機の防振装置
JPH11253690A (ja) * 1998-03-11 1999-09-21 Toshiba Corp 全自動洗濯機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04144594A (ja) * 1990-10-03 1992-05-19 Matsushita Electric Ind Co Ltd 洗濯機の防振装置
JPH11253690A (ja) * 1998-03-11 1999-09-21 Toshiba Corp 全自動洗濯機

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160010259A1 (en) * 2014-07-11 2016-01-14 Lg Electronics Inc. Washing machine
US9951454B2 (en) * 2014-07-11 2018-04-24 Lg Electronics Inc. Washing machine

Also Published As

Publication number Publication date
JP2014183889A (ja) 2014-10-02

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