JP2007061625A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine with an easily producible drive motor which can reduce the load in the power transmission of a rotary shaft along with an increase in utilizing a space. <P>SOLUTION: The washing machine comprises a tub 200, a drum 300 disposed in the tub 200, a permanent magnet disposed in the drum 300 and a stator which interacts with the permanent magnet to generate a rotation force for the drum 300. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a washing machine, and more particularly to a drum washing machine including a drive motor.

  In general, a washing machine refers to an apparatus that performs washing, rinsing, and dehydration processes using an electric motor as a main power and using detergent and water to remove dirt on clothes. Such a washing machine includes an electric motor of a power unit, a mechanical unit that transmits energy to washing water, a control unit that controls a washing process, a water supply device that supplies and discharges water, and a drainage device. The washing machines currently used are roughly classified into a drum type, a stirring type, and a whirling type.

  In a drum washing machine, water, detergent, or laundry is placed inside the drum on which many protrusions are formed, and then the drum is rotated at a low speed around the horizontal axis so that the laundry is raised by the protrusions. Laundry is performed by a downward impact.

  The drum is a space in which the laundry is accommodated, and is disposed in the tab. The tub is a space for storing washing water. The drum is rotated by a drive motor. The drive motor includes a stator having a permanent magnet attached to the inner peripheral surface, and a rotor having a winding portion around which a coil is wound.

  Conventionally, a drive motor is disposed outside the tab and connected to the drum by a rotating shaft. And the said stator is provided in the outer surface of the said tab, and the said rotor is arrange | positioned on the outer periphery of the said stator.

  According to the conventional method as described above, the drive motor occupies a separate space outside the tab. Therefore, the degree of space occupied by the drive motor and the size of the tabs and the drum are reduced, so that space utilization is reduced.

  Further, the driving force of the driving motor is transmitted to the drum through the rotating shaft. That is, since the rotating shaft serves as a main transmission means for driving force, there is a disadvantage that a large load is applied to the rotating shaft.

  Furthermore, a large number of parts are used, and a large number of assembly steps are required for the installation of such parts. Therefore, the manufacturing process becomes complicated and the manufacturing cost increases. In addition, there is a disadvantage that considerable vibration and noise are generated during the operation of the stator and the rotor.

  The objective of this invention is providing the washing machine which has the structure of the drive motor which can increase space utilization.

  Another object of the present invention is to provide a washing machine having a structure of a drive motor that can reduce the load of power transmission of a rotating shaft.

  Another object of the present invention is to provide a washing machine having a drive motor structure that is easy to manufacture.

  The washing machine according to the present invention includes a tab, a drum disposed in the tab, a permanent magnet disposed in the drum, and a stator that interacts with the permanent magnet to generate a rotational force on the drum. And including.

  A washing machine according to another aspect of the present invention includes a tab for storing washing water, a drum disposed in the tab, a permanent magnet disposed in the drum, a winding unit, and a winding unit wound around the winding unit. And a stator that interacts with the permanent magnet to generate a rotational force against the drum.

  A washing machine according to still another embodiment of the present invention includes a drum, a depressed portion formed in the drum, a permanent magnet disposed in the depressed portion, and the rotation with respect to the drum by interacting with the permanent magnet. And a stator that generates force.

  Preferably, the stator is installed on the tab. The stator is preferably resistant to washing water.

  Preferably, the permanent magnet and the stator interact in the radial direction of the drum. Optionally, the permanent magnet and the stator interact in the axial direction of the drum.

  In a preferred embodiment, the permanent magnet is formed in a closed loop shape.

  In a preferred embodiment, the drum is formed with a depression, and the permanent magnet is installed in the depression.

  Preferably, the entire permanent magnet is installed inside the depressed portion, and the depressed portion opens toward the stator.

  In a preferred embodiment, the stator includes a winding portion and a coil wound around the winding portion, and an end portion of the winding portion is exposed at a portion of the tab facing the permanent magnet. .

  According to the washing machine of the present invention, since the permanent magnet is provided on the drum and the stator is provided on the tab, the drum becomes the rotor without requiring a separate component such as a rotor frame. Therefore, the space formed for providing the drive motor in the related art can be used as the space for the drum and the tab, so that the capacity of the drum and the tab can be increased and the space utilization of the washing machine can be increased.

  Further, according to the washing machine, since a rotor frame or the like is not required separately, the number of parts is reduced. Therefore, there is an effect that the manufacturing process of the washing machine is simplified and the manufacturing cost can be reduced.

  Furthermore, according to the washing machine, a rotational force is generated by the interaction between the permanent magnet provided on the drum and the stator provided on the tab, so that the rotational force can directly act on the drum. Therefore, compared to the conventional method in which the rotational force generated by a separately installed drive motor is almost transmitted by the rotary shaft, the load applied to the rotary shaft is reduced, so that the reliability of drum driving can be increased. is there.

  FIG. 1 is a vertical sectional view showing a drum washing machine according to a first embodiment of the present invention, and FIG. 2 is an enlarged view of a portion A shown in FIG.

  Referring to FIGS. 1 and 2, a drum washing machine main body 100 is provided such that a cabinet 103 is fixed to an upper plate 101 and a lower plate 102 so that a space is formed therein, and a drum 300 is provided in the space. And a device such as a drive motor 201 is provided. The drum 300 is driven by a driving force generated by the driving motor 201. A driving force generated by the driving motor 201 is transmitted to the drum 300 through a rotating shaft 350.

  The drive motor 201 includes a permanent magnet 320 formed on the drum 300 and a stator 202 formed on the tab 200. The stator 202 is formed with a winding unit 220 in which the coil 230 is wound a plurality of times. When power is applied to the coil 230, the winding unit 220 is magnetized and interacts with the permanent magnet 320. Due to such interaction, a driving force is generated in the driving motor 201.

  The drum 300 is formed with a depressed portion 310 that is depressed at a predetermined depth. The depressed portion 310 includes a depressed portion bottom surface 311 and a depressed portion side surface 312. The depression 310 is opened in the direction of the stator 202.

  The depressed portion bottom surface 311 and the depressed portion side surface 312 may be formed by deforming a part of the drum 300. The permanent magnet 320 is provided on the depression side surface 312. A rotating shaft fixing unit 330 is provided to fix the rotating shaft 350 to the depressed portion 310. The rotating shaft fixing part 330 may be a predetermined projectile.

  The permanent magnet 320 has a single magnetized shape, and is continuously magnetized to a north pole and a south pole with a predetermined width. The permanent magnet 320 may be formed by magnetizing a material in which a strong magnetic rare earth metal and rubber are mixed in a long band shape having a predetermined length.

  The stator 202 is formed with a stator back panel 211, a stator front panel 210 that is spaced forward from the stator back panel 211 at a predetermined interval, and a stator side panel 212 that forms a side surface of the stator 202. Is done. The stator back panel 211, the stator front panel 210, and the stator side panel 212 are coupled to each other to form a sealed space with respect to the outside. A winding unit 220 and a coil 230 wound around the winding unit 220 a plurality of times are provided in the sealed space. One side of the winding unit 220 is supported by a support unit 222 and fixed to the stator 202. The end portion 221 of the winding unit 220 is coupled to the stator side panel 212 while being exposed to the outside. Accordingly, the end portion 221 interacts with the permanent magnet 320 after the coil 230 is powered on and magnetized. The winding unit 220 and the stator side panel 212 are sealed so that the cleaning water in the tab 200 does not flow into the stator 202.

  In this embodiment, the permanent magnet 320 is provided on the depressed portion side surface 312, and the winding portion 220 is provided in the radial direction of the drive motor 201 or the drum 300 so as to correspond to the permanent magnet 320. The end portion 221 is exposed to the outside from the stator side panel 212. Therefore, the permanent magnet 320 and the stator 202 interact in the radial direction.

  The stator 202 is provided with a first bearing 250 and a second bearing 251. The first bearing 250 and the second bearing 251 rotatably couple the rotating shaft 350 to the stator 202. The rotating shaft 350 is stably supported by being spaced apart from the first bearing 250 and the second bearing 251 at a predetermined interval.

  A sealing member 240 is provided on the front surface of the first bearing 250. The sealing member 240 seals between the rotating shaft 350 and the stator front panel 210 so that the cleaning water in the tab 200 does not flow into the bearings 250 and 251. Therefore, the lubricating oil generally used for the bearings 250 and 251 is not mixed with cleaning water. The washing water is prevented from flowing into the stator 202 to prevent leakage.

  On the other hand, the tab 200 provided in the main body 100 and having one side communicating with the air duct 130 has a substantially cylindrical shape, has a structure in which a front surface is opened and a rotating shaft 350 is penetrated in the rear. Further, the tab 200 is a place where washing water is collected at the time of washing, so that the airtightness is maintained.

  A number of through holes 141 are formed in the drum 300, and washing water is supplied from a water supply port 125 to supply water to a predetermined portion of the drum 200. Further, the washing water is smoothly drained from the drum 300 rotated during dehydration after the washing process by the through-hole 141. Then, when hot air supplied from the air duct 130 at the time of drying flows into the tab 200, the laundry is dried through the through holes 141 formed in the drum 300.

  One side of the tab 200 communicates with the air duct 130. A blower fan 132 is provided inside the blower duct 130 to generate air flow. The air duct 130 may provide hot air into the tub 200 to perform a drying function. An exhaust duct 140 is formed on the other side of the tab 200. The hot air supplied from the air duct 130 to the tab 200 is exhausted to the outside of the washing machine through the exhaust duct 140. The exhaust duct 140 is extended outside the washing machine.

  On the other hand, the detergent charging box 120 is positioned in the lower part of the upper plate 101 on the front surface of the washing machine, is formed in a box shape with one side opened, and has a structure that can be attached and detached. The detergent charging box 120 is connected to a water supply pipe 180 for supplying cold / hot water on the other side. Accordingly, the cold / hot water flowing in from the water supply pipe 180 is mixed with the detergent and the fiber softener and supplied to the tab 200 through the water supply port 125 connected to the detergent charging box 120.

  FIG. 3 is a perspective view showing the back surface of the drum in the first embodiment of the present invention.

  Referring to FIG. 3, a depressed portion 310 that is depressed at a predetermined depth is formed at the center of the drum 300. A side surface of the depression 310 is provided with a permanent magnet 320 having a long band shape in which N poles and S stations are alternately magnetized. The depressed portion 310 includes a depressed portion bottom surface 311 and a depressed portion side surface 312. In this embodiment, the permanent magnet 320 is formed on the depressed portion side surface 312. A rotating shaft 350 is fixed to the central portion of the depressed portion 310 by a rotating shaft fixing portion 330.

  As described above, when the permanent magnet 320 is provided in the depressed portion 310 which is a part of the drum 300, the drum 300 can perform the function of the rotor without requiring a separate rotor. Therefore, a space in which a rotor is conventionally provided and thus a drive motor including a rotor and a stator is provided can be a part of the drum 300. Therefore, the capacity of the drum 300 can be increased with the washing machine 100 having the same size. Since no separate parts such as a rotor frame are required, the manufacturing process of the washing machine 100 can be simplified and the manufacturing cost can be reduced.

  In addition, when the depressed portion 310 is formed as described above and the permanent magnet 320 is provided on the depressed portion side surface 312, the drum 300 is required to have only a minimum space for installing the drive motor 201. The Therefore, the capacity of the drum 300 can be maximized.

  In particular, in order to maximize the capacity of the drum 300, the entire permanent magnet 320 may be provided inside the depressed portion 310. Therefore, since the permanent magnet 320 does not protrude outside the depressed portion 310, the installation space of the drive motor 201 of the drum 300 can be minimized.

  On the other hand, since the permanent magnet 320 has a continuous belt shape, the permanent magnet 320 is uniformly magnetized as a whole. Therefore, the vibration and noise generated by the nonuniform magnetization due to the conventional permanent magnet section can be reduced.

  FIG. 4 is a perspective view showing the front surface of a part of the tab in the first embodiment of the present invention.

  Referring to FIG. 4, the center portion of the tab 200 protrudes at a predetermined height, and the components of the stator 202 are provided on the back surface of the protruding portion. The protruding upper surface becomes the stator front panel 210, and the protruding side surface becomes the stator side panel 212. A hole is formed in the central portion of the stator front panel 210 and the rotating shaft 350 passes therethrough. A sealing member 240 is provided between the rotating shaft 350 and the stator front panel 210.

  The end portions 221 of the plurality of winding portions 220 protrude from the side surface of the stator side panel 212. Only the end portion 221 is exposed on the side surface of the stator side panel 212, and the body portion of the winding portion 220 and the coil 23 wound thereon are not exposed. Therefore, the washing water accommodated in the tub 200 does not affect the internal parts of the stator 202 such as the winding unit 220 and the coil 230. And the leakage current that can be induced by the inflow of washing water can be prevented by the coil 230 through which the current flows.

  Hereinafter, the operation of the washing machine 100 will be described with the drive motor 201 as the center.

  First, when a power source is applied to the coil 230, the winding unit 220 is magnetized. Therefore, an attractive force / reaction force is generated between the permanent magnet 320 and the stator 202 due to the magnetism of the winding unit 220 and the magnetism of the permanent magnet 320. The drum 300 provided with the permanent magnet 320 rotates by the attractive force / reactive force. Therefore, the laundry in the drum 300 is washed.

  5 to 8 are views illustrating a washing machine according to a second embodiment of the present invention. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In the description of the present embodiment, the description overlapping the portion described in the first embodiment is omitted, and here, the description will focus on the features of the present embodiment.

  FIG. 5 is a vertical sectional view showing a drum washing machine according to a second embodiment of the present invention, and FIG. 6 is an enlarged view of a portion B shown in FIG.

  Referring to FIGS. 5 and 6, the drum 300 is formed with a depressed portion 310 including a depressed portion bottom surface 311 and a depressed portion side surface 312. The tab 200 is provided with a stator 202. The stator 202 is hermetically sealed against washing water by a stator front panel 210, a stator back panel 211, and a stator side panel 212, and a winding unit 224, a coil 231, and the like are sealed in the sealed space. Parts are provided.

  In this embodiment, a permanent magnet 321 is provided on the depressed portion bottom surface 311. The winding unit 224 is provided in the length direction of the rotating shaft 350 so as to correspond to the position of the permanent magnet 321. The coil 231 is wound around the winding unit 224. Accordingly, the end portion 223 of the winding unit 224 is exposed to the outside of the stator front panel 210 and faces the permanent magnet 321. Of course, the gap between the end 223 and the stator front panel 210 is sealed.

  When arranged as described above, the permanent magnet 321 and the stator 202 interact in the axial direction to generate a rotational force.

  By providing the permanent magnet 321 and the stator 210 as described above, the space of the drum 300 is increased, and space utilization can be increased. The permanent magnet 321 is continuously magnetized alternately in the north and south poles, and becomes uniform in magnetization, so that noise and vibration during rotation are reduced.

  FIG. 7 is a perspective view showing the rear surface of the drum in the second embodiment of the present invention, and FIG. 8 is a perspective view showing the front surface of a part of the tab in the second embodiment of the present invention.

  Referring to FIGS. 7 and 8, the depressed portion 310 of the drum 300 includes a depressed portion bottom surface 311 and a depressed portion side surface 312. A permanent magnet 321 is provided on the depressed portion bottom surface 311.

  The permanent magnet 321 has a continuous belt shape. It is made of a rare earth metal which is a ferromagnetic material, and can be formed as described above by being mixed with rubber or the like. The permanent magnet 321 is alternately magnetized to N and S poles. Therefore, the permanent magnet 321 can be uniformly magnetized as a whole due to continuous characteristics.

  The stator 202 provided on the tab 200 is sealed by the stator front panel 210, the stator back panel 211, and the stator side panel 212. The end portion 223 of the winding unit 224 is exposed on the stator front panel 210.

  In this embodiment, the end portion 223 exposed as described above faces the permanent magnet 321. When power is applied and the winding part 224 is magnetized, the magnetism of the winding part 224 interacts with the permanent magnet 321 through the end part 223. Accordingly, the permanent magnet 321 and the stator 202 interact in the axial direction to generate a rotational force.

  According to the washing machine of the present invention configured as described above, since the drum is provided with a permanent magnet and the stator is provided on the tab, the drum rotates without the need for a separate item such as a rotor frame. Become a child. Accordingly, a conventional drive motor including a rotor and a stator is manufactured separately from the drum and the tab, and the installation space for the drive motor that is separately required can be used as a space for the drum and the tab. Therefore, there is an effect that the capacity of the drum and the tab is increased and the space utilization of the washing machine can be increased.

  Further, according to the washing machine, since a rotor frame or the like is not required separately, the number of parts is reduced. Therefore, there is an effect that the manufacturing process of the washing machine is simplified and the manufacturing cost can be reduced.

  Furthermore, according to the washing machine, a rotational force is generated by the interaction between the permanent magnet provided on the drum and the stator provided on the tab, so that the rotational force can directly act on the drum. Therefore, the load applied to the rotating shaft is reduced as compared with the conventional method in which the rotational force generated by the drive motor separately installed is transmitted by the rotating shaft, so that the reliability of drum driving can be increased. is there.

1 is a vertical sectional view showing a drum washing machine according to a first embodiment of the present invention. FIG. 2 is an enlarged view of a portion A illustrated in FIG. 1. In the first embodiment of the present invention, it is a perspective view showing the back of the drum. In 1st Example of this invention, it is a perspective view which shows the front surface of a part of tab. It is a vertical sectional view showing a drum washing machine according to a second embodiment of the present invention. FIG. 6 is an enlarged view of a portion B illustrated in FIG. 5. In 2nd Example of this invention, it is a perspective view which shows the back surface of a drum. In 2nd Example of this invention, it is a perspective view which shows the front surface of a part of tab.

Explanation of symbols

200 Tab 202 Stator 220 Winding part 221 Terminal part 230 Coil 300 Drum 310 Depressed part 320 Permanent magnet 350 Rotating shaft

Claims (10)

Tabs,
A drum installed in the tab;
A permanent magnet installed on the drum;
A stator that interacts with the permanent magnet to generate a rotational force on the drum;
A washing machine comprising:   The washing machine according to claim 1, wherein the stator is installed on the tab.   The washing machine according to claim 1, wherein the stator is water resistant to washing water.   The washing machine according to claim 1, wherein the permanent magnet and the stator interact in a radial direction of the drum.   The washing machine according to claim 1, wherein the permanent magnet and the stator interact in an axial direction of the drum.   The washing machine according to claim 1, wherein the permanent magnet is formed in a closed loop shape.   The washing machine according to claim 1, wherein the drum has a depressed portion, and the permanent magnet is installed in the depressed portion.   The washing machine according to claim 7, wherein the entire permanent magnet is installed inside the depressed portion.   The washing machine according to claim 7, wherein the depressed portion is open in the direction of the stator.   The stator includes a winding unit and a coil wound around the winding unit, and an end portion of the winding unit is exposed at a portion of the tab facing the permanent magnet. The washing machine according to claim 1.

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