US20060000244A1 - Drum washing machine - Google Patents
Drum washing machine Download PDFInfo
- Publication number
- US20060000244A1 US20060000244A1 US11/140,591 US14059105A US2006000244A1 US 20060000244 A1 US20060000244 A1 US 20060000244A1 US 14059105 A US14059105 A US 14059105A US 2006000244 A1 US2006000244 A1 US 2006000244A1
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- United States
- Prior art keywords
- tub
- front wall
- washing machine
- drum washing
- center
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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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
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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
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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
- D06F37/26—Casings; Tubs
- D06F37/265—Counterweights mounted to the tub; Mountings therefor
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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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/12—Casings; Tubs
- D06F39/125—Supporting arrangements for the casing, e.g. rollers or legs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Definitions
- the present invention relates to a drum washing machine, and more particularly, to a drum washing machine including a tub, and a drum rotatably mounted in the tub, wherein the mounting structure for balance weights mounted to a front wall of the tube for weight balance, taking into consideration the weight of a motor mounted to a rear wall of the tub, is improved.
- drum washing machines wash laundry, utilizing friction generated between the laundry and a drum, which is horizontally arranged, and is rotated by a drive force of a motor, under the condition in which detergent and washing water are placed into the drum, together with the laundry.
- a drum washing machine has a washing effect capable of washing laundry using beating and rubbing actions without causing damage and entanglement of the laundry.
- FIG. 1 is a sectional view illustrating a conventional drum washing machine.
- the conventional drum washing machine includes a cabinet 1 , a tub 3 arranged in the cabinet 1 to contain washing water, and a drum 4 rotatably arranged in the tub 3 to carry out a laundry washing function.
- a door 9 is hingably mounted to an opened front wall of the cabinet 1 by means of a door hinge assembly such that the door 9 is openable to allow laundry to be put into the interior of the drum washing machine through the front wall of the cabinet 1 .
- the tub 3 includes a tub body 3 b , and a tub cover 3 a adapted to cover the front side of the tub body 3 b , that is, to constitute a front wall of the tub body 3 b .
- a motor 8 is rotatably mounted to a rear wall of the tub 3 .
- the motor 8 includes a rotating shaft axially connected to the drum 4 , so as to rotate the drum 4 .
- Dampers 6 and springs 7 are mounted to the top and bottom sides of the tub 3 , in order to damp vibrations generated during a spin drying cycle of the drum washing machine, respectively.
- balance weights 5 are mounted to the front wall of the tub 3 , that is, the tub cover 3 a , as shown in FIGS. 1 and 2 .
- the balance weights 5 may be formed by pouring a cement material into a mold or a cavity formed in a hollow plastic molded product, and curing the cement material. Alternatively, the balance weights 5 may be formed using a casting method. The balance weights 5 are mounted to the front wall of the tub 3 by means of a plurality of bolts 5 a.
- the balance weights 5 are laterally symmetrically arranged on a lower portion of the front wall of the tub 3 .
- the tub 3 not only vibrates axially, but also vibrates vertically while swinging axially about an axially central portion of the tub 3 where the dampers 6 and springs 7 are mounted.
- the swing and vibration of the tub 3 increase as the operation of the drum washing machine is continued.
- the present invention is directed to a drum washing machine that substantially obviates one or more problems due to limitations and disadvantages of the related art.
- An object of the present invention is to provide a drum washing machine which includes a balance weight mounting structure capable of reducing vibration generated at a tub of the drum washing machine, thereby being capable of preventing the tub from being damaged at regions where bolts are fastened, during operation of the drum washing machine, while preventing the front wall of the tub from being damaged due to contact between the tub and a drum arranged in the tub.
- a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on a front wall of the tub with respect to a center of the front wall of the tub; and a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub.
- the drum washing machine may further comprise balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- the balance weights may have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
- the balance weights may be symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a third central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a fourth central line extending in perpendicular to the third central line through the center of the front wall of the tub along the front wall of the tub.
- a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on the front wall of the tub with respect to a center of a front wall of the tub; a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
- the drum washing machine may further comprise balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- the balance weights may have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
- the balance weights may be symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a third central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
- the balance weights may be symmetrically arranged with respect to a fourth central line extending in perpendicular to the third central line through the center of the front wall of the tub along the front wall of the tub.
- a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet to contain washing water; a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet to contain washing water; a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub; and a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
- FIG. 1 is a sectional view illustrating a conventional drum washing machine
- FIG. 2 is a front view illustrating a conventional balance weight mounting structure for mounting balance weights in the conventional drum washing machine
- FIG. 3 is a sectional view schematically illustrating a configuration of a drum washing machine to which first and second embodiments of the present invention are applied;
- FIG. 4 is a front view illustrating a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the first embodiment of the present invention
- FIG. 5 is a front view illustrating a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the second embodiment of the present invention.
- FIG. 6 is an exploded perspective view illustrating a balance weight mounting structure for mounting balance weights in a drum washing machine with a drying function in accordance with a third embodiment of the present invention.
- FIG. 3 schematically illustrates a configuration of a drum washing machine to which first and second embodiments of the present invention are applied.
- FIG. 4 illustrates a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the first embodiment of the present invention.
- FIG. 5 illustrates a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the second embodiment of the present invention.
- the drum washing machine to which the first and second embodiments of the present invention are applied, includes a cabinet 100 , a tub 30 arranged in the cabinet 100 to contain washing water, and a drum 40 rotatably arranged in the tub 30 to carry out a laundry washing function.
- a door 90 is hingably mounted to an opened front wall of the cabinet 100 by means of a hinge assembly such that the door 90 is openable to allow laundry to be put into the interior of the drum washing machine through the front wall of the cabinet 100 .
- the tub 30 includes a tub body 30 b , and a tub cover 30 a attached to the front side of the tub body 30 b to constitute a front wall of the tub body 30 b.
- a motor 80 is rotatably mounted to a rear wall of the tub 30 .
- the motor 80 is axially connected with the drum 40 to rotate the drum 40 .
- Dampers 60 and springs 70 are mounted to the top and bottom sides of the tub 30 , in order to damp vibrations generated during a spin drying cycle of the drum washing machine, respectively.
- balance weights 50 are mounted to the front wall of the tub 30 , that is, the tub cover 30 a.
- the balance weights 50 may be formed by pouring a cement material into a mold or a cavity formed in a hollow plastic molded product, and curing the cement material. Alternatively, the balance weights 50 may be formed using a casting method. The balance weights 50 are mounted to the front wall of the tub 30 by means of a plurality of bolts 50 a.
- FIG. 4 illustrates a balance weight mounting structure for mounting balance weights in a drum washing machine in accordance with a first embodiment of the present invention.
- the drum washing machine includes a cabinet 100 , which forms an outer appearance of the drum washing machine, a tub 30 arranged in the cabinet 100 to contain washing water, and a drum 40 rotatably arranged in the tub 30 to carry out a laundry washing function in accordance with rotation of a motor 80 mounted to a rear wall of the tub 30 .
- Balance weights 50 are mounted to a front wall of the tub 30 such that the balance weights 50 are symmetrical with respect to a first center line I-I extending vertically through the center c of the front wall of the tub 30 along the front wall of the tub 30 .
- the balance weights 50 are also symmetrical with respect to a second center line II-II extending through the center c of the front wall of the tub 30 in perpendicular to the first center line I-I along the front wall of the tub 30 .
- the front wall of the tub 30 mounted with the balance weights 50 is balanced in weight between positions opposing to each other with respect to the center c of the front wall of the tub 30 .
- the balance weights 50 may be typically mounted to the tub cover 30 a , which constitutes the front wall of the tub 30 , as shown in FIG. 3 .
- FIG. 4 illustrates a structure in which two balance weights are symmetrically arranged, an increased number of balance weights may be symmetrically arranged.
- FIG. 5 illustrates a balance weight mounting structure for mounting balance weights in a drum washing machine in accordance with a second embodiment of the present invention.
- balance weights 50 are mounted to the front wall of the tub 30 such that the balance weights 50 are symmetrical with respect to a third center line III-III extending diagonally through the center c of the front wall of the tub 30 along the front wall of the tub 30 .
- the balance weights 50 are also symmetrical with respect to a fourth center line IV-IV extending through the center c of the front wall of the tub 30 in perpendicular to the third center line III-III along the front wall of the tub 30 .
- the weight of each balance weight 50 is determined, taking into consideration the weight of the motor 80 mounted to the rear wall of the tub 30 . In either embodiment, it is preferred that the total weight of the balance weights 50 be equal to the weight of the motor 80 .
- the balance weights 50 are mounted to the peripheral portion of the front wall of the tub 30 such that balance is maintained between positions opposing to each other with respect to the center c of the front wall of the tub 30 , thereby causing the tub 30 to have the same weight distribution at portions of the tub 30 opposing to each other with respect to the center c of the front wall of the tub 30 .
- the center of gravity of the front wall of the tub 30 is shifted toward the center c of the front wall of the tub 30 from a lower position where the center of gravity of the front tub wall is positioned in the conventional case illustrated in FIG. 2 . Accordingly, the vertical and horizontal vibration of the tub 30 generated during the washing and spin drying operations of the drum washing machine is greatly reduced, as compared to the conventional case.
- the balance weight mounting structure of the present invention is applicable to a drum washing machine with a drying function, demand for which has recently increased.
- FIG. 6 a third embodiment of the present invention is illustrated in which the balance weight mounting structure of the present invention is applied to a drum washing machine with a drying function.
- the drum washing machine applied to the third embodiment of the present invention includes a cabinet (not shown), which forms an outer appearance of the drum washing machine, a tub 30 arranged in the cabinet to contain washing water, and a drum 40 rotatably arranged in the tub 30 to carry out a laundry washing function in accordance with rotation of a motor (not shown) mounted to a rear wall of the tub 30 .
- a suction duct 10 adapted to suck air into the drum 40 and an exhaust duct 20 adapted to exhaust air from the drum 40 are mounted to the tub 30 .
- An air inlet 31 is formed at the tub 30 in order to communicate the tub 30 with the suction duct 10 .
- Balance weights 50 are mounted to a front wall of the tub 30 in such a manner that the front wall of the tub 30 is balanced in weight between positions opposing to each other with respect to the center of the front wall of the tub 30 .
- this drum washing includes the suction duct 10 and exhaust duct 20 for sucking and exhausting air into and from the drum 40 , respectively, for the drying function.
- the balance weights 50 are mounted to the front wall of the tub 30 at positions other than the position of the air inlet 31 formed at an upper portion of the front wall of the tub 30 to communicate the tub 30 with the suction duct 10 .
- the balance weights 50 are arranged at positions other than the position of the air inlet 31 such that the front wall of the tub 30 is balanced in weight between positions opposing to each other with respect to the center of the front wall of the tub 30 , similarly to the first or second embodiment.
- the balance weights 50 are arranged symmetrically with respect to a first center line extending vertically through the center of the front wall of the tub 30 along the front wall of the tub 30 .
- the balance weights 50 are also symmetrical with respect to a second center line extending through the center of the front wall of the tub 30 in perpendicular to the first center line along the front wall of the tub 30 .
- the balance weights 50 may be arranged symmetrically with respect to a third center line extending diagonally through the center of the front wall of the tub 30 along the front wall of the tub 30 .
- the balance weights 50 are also symmetrical with respect to a fourth center line extending through the center of the front wall of the tub 30 in perpendicular to the third center line along the front wall of the tub 30 .
- the weight of each balance weight 50 is determined, taking into consideration not only the weight of the motor, but also the weights of the suction duct 10 and exhaust duct 20 . In this embodiment, it is preferred that the total weight of the balance weights 50 mounted to the front wall of the tub 30 be equal to the weight of the motor mounted to the rear wall of the tub 30 .
- the balance weights 50 are mounted to the peripheral portion of the front wall of the tub 30 such that the front wall of the tub 30 has a structure symmetrical with respect to the center of the front wall of the tub 30 . Accordingly, balance is maintained between positions of the front wall of the tub 30 opposing to each other with respect to the center of the front wall of the tub 30 .
- the center of gravity of the front wall of the tub 30 is shifted toward the center of the front wall of the tub 30 from a lower position where the center of gravity of the front tub wall is positioned in the conventional case. Accordingly, the vertical vibration of the tub 30 generated along with swing of the tub 30 about an approximately central portion of the tub 30 during operation of the drum washing machine is greatly reduced, as compared to the conventional case.
- the drum washing machine in which the balance weights according to one of the above-described embodiments of the present invention are installed, can greatly reduce vibration generated at the tub, thereby preventing cracks from being generated at regions where bolts for mounting the balance weights are fastened.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
A drum washing machine including an improved balance weight mounting structure is disclosed. The drum washing machine includes a cabinet which forms an outer appearance of the drum washing machine, a tub disposed in the cabinet such that the tub is balanced in weight between positions opposing to each other on a front wall of the tub with respect to a center of the front wall of the tub, and a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub. Balance weights are mounted to the front wall of the tub to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
Description
- This application claims the benefit of the Korean Patent Application No. 20074-39601, filed on Jun. 1, 2004, which is hereby incorporated by reference as if fully set forth herein.
- 1. Field of the Invention
- The present invention relates to a drum washing machine, and more particularly, to a drum washing machine including a tub, and a drum rotatably mounted in the tub, wherein the mounting structure for balance weights mounted to a front wall of the tube for weight balance, taking into consideration the weight of a motor mounted to a rear wall of the tub, is improved.
- 2. Discussion of the Related Art
- Generally, drum washing machines wash laundry, utilizing friction generated between the laundry and a drum, which is horizontally arranged, and is rotated by a drive force of a motor, under the condition in which detergent and washing water are placed into the drum, together with the laundry. Such a drum washing machine has a washing effect capable of washing laundry using beating and rubbing actions without causing damage and entanglement of the laundry.
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FIG. 1 is a sectional view illustrating a conventional drum washing machine. Referring toFIG. 1 , the conventional drum washing machine includes acabinet 1, atub 3 arranged in thecabinet 1 to contain washing water, and adrum 4 rotatably arranged in thetub 3 to carry out a laundry washing function. A door 9 is hingably mounted to an opened front wall of thecabinet 1 by means of a door hinge assembly such that the door 9 is openable to allow laundry to be put into the interior of the drum washing machine through the front wall of thecabinet 1. - The
tub 3 includes atub body 3 b, and atub cover 3 a adapted to cover the front side of thetub body 3 b, that is, to constitute a front wall of thetub body 3 b. Amotor 8 is rotatably mounted to a rear wall of thetub 3. Themotor 8 includes a rotating shaft axially connected to thedrum 4, so as to rotate thedrum 4.Dampers 6 andsprings 7 are mounted to the top and bottom sides of thetub 3, in order to damp vibrations generated during a spin drying cycle of the drum washing machine, respectively. - Since the
motor 8, which has a substantial weight, is mounted to the rear wall of thetub 3, the weight of thetub 3 is rearwardly off balance. As a result, thedrum 4 cannot be smoothly rotated during operation of the drum washing machine. In order to eliminate such a weight unbalance of thetub 3, balanceweights 5, each of which has a predetermined weight, are mounted to the front wall of thetub 3, that is, thetub cover 3 a, as shown inFIGS. 1 and 2 . - Generally, the
balance weights 5 may be formed by pouring a cement material into a mold or a cavity formed in a hollow plastic molded product, and curing the cement material. Alternatively, thebalance weights 5 may be formed using a casting method. Thebalance weights 5 are mounted to the front wall of thetub 3 by means of a plurality ofbolts 5 a. - Conventionally, the
balance weights 5 are laterally symmetrically arranged on a lower portion of the front wall of thetub 3. In this case, however, during operation of the drum washing machine, thetub 3 not only vibrates axially, but also vibrates vertically while swinging axially about an axially central portion of thetub 3 where thedampers 6 andsprings 7 are mounted. In particular, the swing and vibration of thetub 3 increase as the operation of the drum washing machine is continued. - As a result, where the
balance weights 5 are mounted to thetub 3 by means of thebolts 5 a, as in the above-mentioned case, cracks may be generated at regions around bolt holes, through which thebolts 5 a are fastened. Furthermore, when the axial swing and vertical vibration of thetub 3 increase, the front portion of thedrum 4 may strike the front wall of thetub 3, that is, the tub cover 3 a. In this case, thetub cover 3 a may be damaged because thetub cover 3 a is made of a plastic material. - Accordingly, the present invention is directed to a drum washing machine that substantially obviates one or more problems due to limitations and disadvantages of the related art.
- An object of the present invention is to provide a drum washing machine which includes a balance weight mounting structure capable of reducing vibration generated at a tub of the drum washing machine, thereby being capable of preventing the tub from being damaged at regions where bolts are fastened, during operation of the drum washing machine, while preventing the front wall of the tub from being damaged due to contact between the tub and a drum arranged in the tub.
- Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
- To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on a front wall of the tub with respect to a center of the front wall of the tub; and a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub.
- The drum washing machine may further comprise balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- The balance weights may have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
- The balance weights may be symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a third central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a fourth central line extending in perpendicular to the third central line through the center of the front wall of the tub along the front wall of the tub.
- In another aspect of the present invention, a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on the front wall of the tub with respect to a center of a front wall of the tub; a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
- The drum washing machine may further comprise balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- The balance weights may have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
- The balance weights may be symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a third central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
- The balance weights may be symmetrically arranged with respect to a fourth central line extending in perpendicular to the third central line through the center of the front wall of the tub along the front wall of the tub.
- In another aspect of the present invention, a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet to contain washing water; a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
- In another aspect of the present invention, a drum washing machine comprises: a cabinet which forms an outer appearance of the drum washing machine; a tub disposed in the cabinet to contain washing water; a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub; and a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
- It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
-
FIG. 1 is a sectional view illustrating a conventional drum washing machine; -
FIG. 2 is a front view illustrating a conventional balance weight mounting structure for mounting balance weights in the conventional drum washing machine; -
FIG. 3 is a sectional view schematically illustrating a configuration of a drum washing machine to which first and second embodiments of the present invention are applied; -
FIG. 4 is a front view illustrating a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the first embodiment of the present invention; -
FIG. 5 is a front view illustrating a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the second embodiment of the present invention; and -
FIG. 6 is an exploded perspective view illustrating a balance weight mounting structure for mounting balance weights in a drum washing machine with a drying function in accordance with a third embodiment of the present invention. - Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
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FIG. 3 schematically illustrates a configuration of a drum washing machine to which first and second embodiments of the present invention are applied.FIG. 4 illustrates a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the first embodiment of the present invention.FIG. 5 illustrates a balance weight mounting structure for mounting balance weights in the drum washing machine in accordance with the second embodiment of the present invention. - Referring to
FIG. 3 , the drum washing machine, to which the first and second embodiments of the present invention are applied, includes acabinet 100, atub 30 arranged in thecabinet 100 to contain washing water, and adrum 40 rotatably arranged in thetub 30 to carry out a laundry washing function. - A
door 90 is hingably mounted to an opened front wall of thecabinet 100 by means of a hinge assembly such that thedoor 90 is openable to allow laundry to be put into the interior of the drum washing machine through the front wall of thecabinet 100. Thetub 30 includes atub body 30 b, and atub cover 30 a attached to the front side of thetub body 30 b to constitute a front wall of thetub body 30 b. - A
motor 80 is rotatably mounted to a rear wall of thetub 30. Themotor 80 is axially connected with thedrum 40 to rotate thedrum 40.Dampers 60 and springs 70 are mounted to the top and bottom sides of thetub 30, in order to damp vibrations generated during a spin drying cycle of the drum washing machine, respectively. - Since the
motor 80, which has a substantial weight, is mounted to the rear wall of thetub 30, the weight of thetub 30 is rearwardly off balance. As a result, thedrum 40 cannot be smoothly rotated during operation of the drum washing machine. In order to eliminate such a weight unbalance of thetub 30,balance weights 50, each of which has a predetermined weight, are mounted to the front wall of thetub 30, that is, thetub cover 30 a. - Generally, the
balance weights 50 may be formed by pouring a cement material into a mold or a cavity formed in a hollow plastic molded product, and curing the cement material. Alternatively, thebalance weights 50 may be formed using a casting method. Thebalance weights 50 are mounted to the front wall of thetub 30 by means of a plurality ofbolts 50 a. -
FIG. 4 illustrates a balance weight mounting structure for mounting balance weights in a drum washing machine in accordance with a first embodiment of the present invention. In this case, the drum washing machine includes acabinet 100, which forms an outer appearance of the drum washing machine, atub 30 arranged in thecabinet 100 to contain washing water, and adrum 40 rotatably arranged in thetub 30 to carry out a laundry washing function in accordance with rotation of amotor 80 mounted to a rear wall of thetub 30. -
Balance weights 50 are mounted to a front wall of thetub 30 such that thebalance weights 50 are symmetrical with respect to a first center line I-I extending vertically through the center c of the front wall of thetub 30 along the front wall of thetub 30. Thebalance weights 50 are also symmetrical with respect to a second center line II-II extending through the center c of the front wall of thetub 30 in perpendicular to the first center line I-I along the front wall of thetub 30. Accordingly, the front wall of thetub 30 mounted with thebalance weights 50 is balanced in weight between positions opposing to each other with respect to the center c of the front wall of thetub 30. In this case, thebalance weights 50 may be typically mounted to thetub cover 30 a, which constitutes the front wall of thetub 30, as shown inFIG. 3 . - Although
FIG. 4 illustrates a structure in which two balance weights are symmetrically arranged, an increased number of balance weights may be symmetrically arranged. - Meanwhile,
FIG. 5 illustrates a balance weight mounting structure for mounting balance weights in a drum washing machine in accordance with a second embodiment of the present invention. In this case,balance weights 50 are mounted to the front wall of thetub 30 such that thebalance weights 50 are symmetrical with respect to a third center line III-III extending diagonally through the center c of the front wall of thetub 30 along the front wall of thetub 30. Thebalance weights 50 are also symmetrical with respect to a fourth center line IV-IV extending through the center c of the front wall of thetub 30 in perpendicular to the third center line III-III along the front wall of thetub 30. - In both the first and second embodiments illustrated in
FIGS. 4 and 5 , the weight of eachbalance weight 50 is determined, taking into consideration the weight of themotor 80 mounted to the rear wall of thetub 30. In either embodiment, it is preferred that the total weight of thebalance weights 50 be equal to the weight of themotor 80. - Hereinafter, functions and effects according to the above-described first and second embodiments of the present invention will be described.
- The
balance weights 50 are mounted to the peripheral portion of the front wall of thetub 30 such that balance is maintained between positions opposing to each other with respect to the center c of the front wall of thetub 30, thereby causing thetub 30 to have the same weight distribution at portions of thetub 30 opposing to each other with respect to the center c of the front wall of thetub 30. - That is, in accordance with the present invention, the center of gravity of the front wall of the
tub 30 is shifted toward the center c of the front wall of thetub 30 from a lower position where the center of gravity of the front tub wall is positioned in the conventional case illustrated inFIG. 2 . Accordingly, the vertical and horizontal vibration of thetub 30 generated during the washing and spin drying operations of the drum washing machine is greatly reduced, as compared to the conventional case. - Thus, it is possible to prevent cracks from being generated due to the vibration of the
tub 30 during operation of the drum washing machine at regions where thebolts 50 a are fastened. Also, it is possible to prevent thetub 30 from coming into contact with thedrum 40, and thus, to enable the drum washing machine to operate more stably. - Meanwhile, although the first and second embodiments of the present invention have been illustrated and described in conjunction with a general drum washing machine, the balance weight mounting structure of the present invention is applicable to a drum washing machine with a drying function, demand for which has recently increased. Referring to
FIG. 6 , a third embodiment of the present invention is illustrated in which the balance weight mounting structure of the present invention is applied to a drum washing machine with a drying function. - As shown in
FIG. 6 , the drum washing machine applied to the third embodiment of the present invention includes a cabinet (not shown), which forms an outer appearance of the drum washing machine, atub 30 arranged in the cabinet to contain washing water, and adrum 40 rotatably arranged in thetub 30 to carry out a laundry washing function in accordance with rotation of a motor (not shown) mounted to a rear wall of thetub 30. - A
suction duct 10 adapted to suck air into thedrum 40 and anexhaust duct 20 adapted to exhaust air from thedrum 40 are mounted to thetub 30. Anair inlet 31 is formed at thetub 30 in order to communicate thetub 30 with thesuction duct 10.Balance weights 50 are mounted to a front wall of thetub 30 in such a manner that the front wall of thetub 30 is balanced in weight between positions opposing to each other with respect to the center of the front wall of thetub 30. - As described above, this drum washing includes the
suction duct 10 andexhaust duct 20 for sucking and exhausting air into and from thedrum 40, respectively, for the drying function. For this reason, thebalance weights 50 are mounted to the front wall of thetub 30 at positions other than the position of theair inlet 31 formed at an upper portion of the front wall of thetub 30 to communicate thetub 30 with thesuction duct 10. - Although not shown, the
balance weights 50 are arranged at positions other than the position of theair inlet 31 such that the front wall of thetub 30 is balanced in weight between positions opposing to each other with respect to the center of the front wall of thetub 30, similarly to the first or second embodiment. - That is, similarly to the first embodiment, the
balance weights 50 are arranged symmetrically with respect to a first center line extending vertically through the center of the front wall of thetub 30 along the front wall of thetub 30. Thebalance weights 50 are also symmetrical with respect to a second center line extending through the center of the front wall of thetub 30 in perpendicular to the first center line along the front wall of thetub 30. - Alternately, similarly to the second embodiment, the
balance weights 50 may be arranged symmetrically with respect to a third center line extending diagonally through the center of the front wall of thetub 30 along the front wall of thetub 30. In this case, thebalance weights 50 are also symmetrical with respect to a fourth center line extending through the center of the front wall of thetub 30 in perpendicular to the third center line along the front wall of thetub 30. - In the third embodiment, the weight of each
balance weight 50 is determined, taking into consideration not only the weight of the motor, but also the weights of thesuction duct 10 andexhaust duct 20. In this embodiment, it is preferred that the total weight of thebalance weights 50 mounted to the front wall of thetub 30 be equal to the weight of the motor mounted to the rear wall of thetub 30. - Hereinafter, functions and effects according to the above-described third embodiment of the present invention will be described. Similarly to the first and second embodiments, the
balance weights 50 are mounted to the peripheral portion of the front wall of thetub 30 such that the front wall of thetub 30 has a structure symmetrical with respect to the center of the front wall of thetub 30. Accordingly, balance is maintained between positions of the front wall of thetub 30 opposing to each other with respect to the center of the front wall of thetub 30. - That is, in accordance with the present invention, the center of gravity of the front wall of the
tub 30 is shifted toward the center of the front wall of thetub 30 from a lower position where the center of gravity of the front tub wall is positioned in the conventional case. Accordingly, the vertical vibration of thetub 30 generated along with swing of thetub 30 about an approximately central portion of thetub 30 during operation of the drum washing machine is greatly reduced, as compared to the conventional case. - Thus, it is possible to prevent cracks from being generated at regions where the bolts are fastened. Also, it is possible to prevent the
tub 30 from coming into contact with thedrum 40, and thus, to enable the drum washing machine to operate more stably. - As apparent from the above description, in accordance with the present invention, it is possible to perform a washing operation through a more stable structure, as compared to the conventional case. That is, the drum washing machine, in which the balance weights according to one of the above-described embodiments of the present invention are installed, can greatly reduce vibration generated at the tub, thereby preventing cracks from being generated at regions where bolts for mounting the balance weights are fastened. In addition, it is possible to prevent contact between the tub and the drum, and thus, to prevent generation of noise caused by the contact between the tub and the drum.
- It will be apparent to those skilled in the art that various modifications and varitations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention covers the modifications and varitations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (16)
1. A drum washing machine comprising:
a cabinet which forms an outer appearance of the drum washing machine;
a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on a front wall of the tub with respect to a center of the front wall of the tub; and
a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub.
2. The drum washing machine according to claim 1 , further comprising:
balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
3. The drum washing machine according to claim 2 , wherein the balance weights have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
4. The drum washing machine according to claim 2 , wherein the balance weights are symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
5. The drum washing machine according to claim 4 , wherein the balance weights are symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
6. The drum washing machine according to claim 2 , wherein the balance weights are symmetrically arranged with respect to a first central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
7. The drum washing machine according to claim 6 , wherein the balance weights are symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
8. A drum washing machine comprising:
a cabinet which forms an outer appearance of the drum washing machine;
a tub disposed in the cabinet, the tub being balanced in weight between positions opposing to each other on the front wall of the tub with respect to a center of a front wall of the tub;
a drum rotatably disposed in the tub, and adapted to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and
a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
9. The drum washing machine according to claim 8 , further comprising:
balance weights mounted to the front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
10. The drum washing machine according to claim 9 , wherein the balance weights have a total weight equal to a weight of the motor mounted to the rear wall of the tub.
11. The drum washing machine according to claim 9 , wherein the balance weights are symmetrically arranged with respect to a first central line extending vertically through the center of the front wall of the tub along the front wall of the tub.
12. The drum washing machine according to claim 11 , wherein the balance weights are symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
13. The drum washing machine according to claim 9 , wherein the balance weights are symmetrically arranged with respect to a first central line extending diagonally through the center of the front wall of the tub along the front wall of the tub.
14. The drum washing machine according to claim 13 , wherein the balance weights are symmetrically arranged with respect to a second central line extending in perpendicular to the first central line through the center of the front wall of the tub along the front wall of the tub.
15. A drum washing machine comprising:
a cabinet which forms an outer appearance of the drum washing machine;
a tub disposed in the cabinet to contain washing water;
a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub; and
a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub.
16. A drum washing machine comprising:
a cabinet which forms an outer appearance of the drum washing machine;
a tub disposed in the cabinet to contain washing water;
a drum rotatably disposed in the tub to perform a washing function in accordance with a rotation of a motor attached to a rear wall of the tub;
a pair of balance weights mounted to a front wall of the tub, and adapted to cause the tub to be balanced in weight between positions opposing to each other on the front wall of the tub with respect to the center of the front wall of the tub; and
a suction duct and an exhaust duct respectively connected to the front and rear walls of the tub, the suction duct having a heater and a blowing fan.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KRP2004-39601 | 2004-06-01 | ||
KR1020040039601A KR101055727B1 (en) | 2004-06-01 | 2004-06-01 | Drum washing machine |
Publications (1)
Publication Number | Publication Date |
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US20060000244A1 true US20060000244A1 (en) | 2006-01-05 |
Family
ID=35512506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/140,591 Abandoned US20060000244A1 (en) | 2004-06-01 | 2005-05-31 | Drum washing machine |
Country Status (2)
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US (1) | US20060000244A1 (en) |
KR (1) | KR101055727B1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US20060174666A1 (en) * | 2005-02-04 | 2006-08-10 | Lg Electronics Inc. | Tub for washing machines |
US20110162442A1 (en) * | 2008-09-10 | 2011-07-07 | Prof. Dr. Lars Bertil Carnehammar | Method, system and device for reducing vibration in an article processing machine, such as a washing machine |
CN103459705A (en) * | 2011-03-28 | 2013-12-18 | 大宇电子株式会社 | Drum washing machine |
CN103459704A (en) * | 2011-03-28 | 2013-12-18 | 大宇电子株式会社 | Drum washing machine |
LT6002B (en) | 2012-07-16 | 2014-03-25 | Ažd Praha S. R. O. | Apparatus for automatic switching between computer with the help of a common mouse and a common keyboard and method of this automatic switching |
CN104278473A (en) * | 2013-07-09 | 2015-01-14 | 海尔集团公司 | Double-drum washing machine |
CN104278481A (en) * | 2013-07-09 | 2015-01-14 | 海尔集团公司 | Double-drum washing machine |
US20160326687A1 (en) * | 2015-05-08 | 2016-11-10 | Lg Electronics Inc. | Washing machine |
CN106637791A (en) * | 2016-11-29 | 2017-05-10 | 无锡小天鹅股份有限公司 | Washing machine |
US10060070B2 (en) * | 2015-05-08 | 2018-08-28 | Lg Electronics Inc. | Washing machine |
US20190013642A1 (en) * | 2016-03-14 | 2019-01-10 | Osram Opto Semiconductors Gmbh | Semiconductor Light Source |
CN109267287A (en) * | 2017-07-18 | 2019-01-25 | 青岛海尔洗衣机有限公司 | Clothes treatment device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101245137B1 (en) * | 2006-01-26 | 2013-03-25 | 삼성전자주식회사 | Drum type washing machine |
KR102411843B1 (en) * | 2015-05-08 | 2022-06-22 | 엘지전자 주식회사 | Washing machine |
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US5289703A (en) * | 1989-06-16 | 1994-03-01 | Mitsubishi Jukogyo Kabushiki Kaisha | Drum type washing machine |
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TW381135B (en) | 1996-06-03 | 2000-02-01 | Samsung Electronics Co Ltd | Washing machine with ball balancer |
KR100387558B1 (en) * | 1999-12-30 | 2003-06-25 | 유한회사 대동 | Balancer for washing machine |
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US3373962A (en) * | 1965-12-29 | 1968-03-19 | Gen Steel Wares Ltd | Washing machine support structure |
US3359760A (en) * | 1966-11-21 | 1967-12-26 | Gen Electric | Control for automatic washer |
US5289703A (en) * | 1989-06-16 | 1994-03-01 | Mitsubishi Jukogyo Kabushiki Kaisha | Drum type washing machine |
Cited By (17)
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US20060174666A1 (en) * | 2005-02-04 | 2006-08-10 | Lg Electronics Inc. | Tub for washing machines |
US20110162442A1 (en) * | 2008-09-10 | 2011-07-07 | Prof. Dr. Lars Bertil Carnehammar | Method, system and device for reducing vibration in an article processing machine, such as a washing machine |
EP2692933A4 (en) * | 2011-03-28 | 2015-01-14 | Dongbu Daewoo Electronics Corp | Drum washing machine |
CN103459705A (en) * | 2011-03-28 | 2013-12-18 | 大宇电子株式会社 | Drum washing machine |
CN103459704A (en) * | 2011-03-28 | 2013-12-18 | 大宇电子株式会社 | Drum washing machine |
EP2692933A2 (en) * | 2011-03-28 | 2014-02-05 | Daewoo Electronics Corporation | Drum washing machine |
EP2692934A2 (en) * | 2011-03-28 | 2014-02-05 | Daewoo Electronics Corporation | Drum washing machine |
EP2692934A4 (en) * | 2011-03-28 | 2015-01-07 | Dongbu Daewoo Electronics Corp | Drum washing machine |
LT6002B (en) | 2012-07-16 | 2014-03-25 | Ažd Praha S. R. O. | Apparatus for automatic switching between computer with the help of a common mouse and a common keyboard and method of this automatic switching |
CN104278473A (en) * | 2013-07-09 | 2015-01-14 | 海尔集团公司 | Double-drum washing machine |
CN104278481A (en) * | 2013-07-09 | 2015-01-14 | 海尔集团公司 | Double-drum washing machine |
US20160326687A1 (en) * | 2015-05-08 | 2016-11-10 | Lg Electronics Inc. | Washing machine |
US10060070B2 (en) * | 2015-05-08 | 2018-08-28 | Lg Electronics Inc. | Washing machine |
US10100457B2 (en) * | 2015-05-08 | 2018-10-16 | Lg Electronics Inc. | Washing machine |
US20190013642A1 (en) * | 2016-03-14 | 2019-01-10 | Osram Opto Semiconductors Gmbh | Semiconductor Light Source |
CN106637791A (en) * | 2016-11-29 | 2017-05-10 | 无锡小天鹅股份有限公司 | Washing machine |
CN109267287A (en) * | 2017-07-18 | 2019-01-25 | 青岛海尔洗衣机有限公司 | Clothes treatment device |
Also Published As
Publication number | Publication date |
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KR101055727B1 (en) | 2011-08-11 |
KR20050114391A (en) | 2005-12-06 |
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Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JONG MIN;NO, YANG HWAN;CHO, HAN KI;AND OTHERS;REEL/FRAME:016925/0331 Effective date: 20050822 |
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