Clothing treatment apparatus

Abstract

A clothing treatment apparatus according to an embodiment of the present invention comprises a tub, a drum, and an induction module. The induction module includes a working coil and permanent magnets. The induction module is disposed such that the center thereof is located on a second reference surface forming a predetermined angle with a first reference surface. The induction module includes a first group, which is a combination of permanent magnets disposed in a first area, and a second group, which is a combination of permanent magnets disposed in a second area, with respect to the second reference surface, and the magnetic force of the second group is greater than the magnetic force of the first group. Each of the permanent magnets causes the magnetic field generated by the working coil to be concentrated in the direction of the drum. Even when the induction module is asymmetrically disposed with respect to the first reference surface, the asymmetry of a magnetic flux can be alleviated and the magnetic field and the magnetic flux can be concentrated toward the drum.

Description

Garment processing equipment

[0001] The present invention relates to a clothing treatment device that heats a drum containing clothing or laundry using an induction module, and more specifically, to a clothing treatment device that is provided with a permanent magnet so that a magnetic field by a working coil of an induction module can be concentrated toward the drum.

[0002] The garment treatment device may be configured to wash, dry and / or refresh garments, laundry, etc.

[0003] Washing machines for washing clothes, dryers for drying clothes, and refreshers for refreshing clothes are examples of clothing treatment devices.

[0004] There are also garment treatment devices that perform multiple processes—washing, drying, and refreshing—in a single device. A representative example is a garment treatment device capable of both washing and drying.

[0005] A clothing treatment device may be equipped with a heating means for heating the washing water, clothing or air inside the device.

[0006] Electric heaters, gas heaters, heat pumps, etc. can be used as heating means for the clothing treatment device.

[0007] Recently, a garment treatment device equipped with an induction module as a means for heating the drum of the garment treatment device has been disclosed.

[0008] The induction module heats the drum using induction heating, thereby effectively heating the washing water, clothes, or air inside the drum.

[0009] That is, by supplying current to the working coil of the induction module, the drum can be heated by electromagnetic induction. When a high-frequency alternating current flows through the working coil, a magnetic field is generated in the working coil, and an eddy current is induced in the drum, which is the heated object, by the electromagnetic induction effect caused by the magnetic field, and heat is generated in the resistance component of the drum by the eddy current, causing heating.

[0010] In this way, the drum is heated by the magnetic field generated by the working coil of the induction module, but since the magnetic field by the working coil can be formed toward the outside of the drum, electromagnetic interference (EMI) noise may be generated.

[0011] In a garment treatment device, the drum is configured to rotate, and the induction module is installed at a distance from the drum. Since the gap between the drum and the induction module is relatively large, more noise may be generated that is radiated to the outside.

[0012] Additionally, if the induction module is not placed at the center of the upper side of the drum, but is tilted in one direction (e.g., to the left or right), noise caused by a magnetic field in one direction may have a different value from noise caused by a magnetic field in the opposite direction.

[0013] Products using induction modules must pass radiation interference test standards for a certain frequency band (9kHz to 30MHz). However, if the induction module is not placed in the center of the drum but is tilted in one direction, there may be a problem of increased radiation noise in the opposite direction.

[0014] In this way, there is a problem that noise caused by a magnetic field in one direction of the clothing treatment device may become louder depending on the placement of the induction module in the clothing treatment device.

[0015] The problem to be solved by the present invention is to prevent an increase in magnetic field noise radiated to the outside of a clothing treatment device while minimizing an increase in the number or amount of permanent magnets, and to provide a clothing treatment device in which, when an induction module is not placed in the center of the left-right direction of the drum but is tilted in one direction, an increase in magnetic field noise in the opposite direction is prevented, and a magnetic field and magnetic flux can be concentrated toward the drum.

[0016] The problem to be solved by the present invention is to provide a clothes treatment device in which the induction module is not arranged in the center of the left and right direction of the drum, but is arranged to be tilted in one direction, and the permanent magnets arranged on opposite sides of the outer side of the working coil are formed to be identical to each other, thereby preventing an increase in magnetic field noise in one direction and allowing the magnetic field and magnetic flux to be concentrated toward the drum.

[0017] The clothing treatment device described in the present application comprises: a tub; a drum formed of a metal material and having a space therein for accommodating laundry, the drum being rotatable about a rotational axis in a first direction within the tub; and an induction module fixedly coupled to the tub, the induction module including a working coil configured to heat the drum through a magnetic field when current is applied thereto, and a plurality of permanent magnets provided adjacent to the outside of the working coil.

[0018] The above induction module is arranged so that its center is located on a second reference plane having a predetermined angle in the first rotational direction with respect to the rotational axis from a first reference plane that is vertical and passes through the rotational axis.

[0019] The induction module comprises a first group which is a combination of one or more permanent magnets arranged in a first region toward the first rotational direction with respect to the second reference plane; and a second group which is a combination of one or more permanent magnets arranged in a second region opposite to the first rotational direction with respect to the second reference plane.

[0020] The magnetic force of the second group is greater than the magnetic force of the first group.

[0021] When a plurality of the above permanent magnets are formed identically, the number of the above permanent magnets in the second group may be greater than the number of the above permanent magnets in the first group.

[0022] The above-mentioned working coil is formed along the second reference plane and is wound around a central axis passing through the center of the induction module, and a plurality of the above-mentioned permanent magnets can be arranged orthogonal to the direction in which the working coil is wound.

[0023] A plurality of the above permanent magnets can be arranged within an area formed by the working coil.

[0024] The plurality of permanent magnets may be symmetrical about a third reference plane that is perpendicular to the first reference plane and passes through the central axis.

[0025] The plurality of permanent magnets may include a first magnet and a second magnet.

[0026] The above first magnet is one or more permanent magnets belonging to the first group and aligned with the third reference plane.

[0027] The second magnet is one or more permanent magnets belonging to the second group and aligned with the third reference plane.

[0028] The first magnet and the second magnet may be formed identically to each other.

[0029] The ratio of the number of the second magnets to the number of the first magnets may be 2 to 4.

[0030] The plurality of permanent magnets may include a third magnet arranged on one side of the third reference plane; and a fourth magnet arranged on the opposite side of the third magnet with respect to the third reference plane.

[0031] In an embodiment of the present invention, the angle (θ) may be 5° to 15°.

[0032] In an embodiment of the present invention, the angle (θ) may be 5° and the magnification may be 2.5.

[0033] The clothing treatment device according to an embodiment of the present invention can be configured to satisfy a graph that passes through (10, 3) and has a slope of 1 / 10 when the size of the angle (deg) is the x-axis and the size of the magnification is the y-axis.

[0034] The above-mentioned working coil is arranged so that its center is located on a second reference plane having a predetermined angle in the first rotational direction with respect to the rotational axis from a first reference plane that is vertical and passes through the rotational axis.

[0035] The above working coil can be divided into a first coil portion facing the first rotational direction with respect to the second reference plane and a second coil portion facing the opposite direction of the first rotational direction with respect to the second reference plane.

[0036] The area shielded by the permanent magnet in the second coil section may be larger than the area shielded by the permanent magnet in the first coil section.

[0037] The plurality of permanent magnets are all formed identically, and the number of permanent magnets provided on the outside of the second coil part may be greater than the number of permanent magnets provided on the outside of the first coil part.

[0038] The above drum is formed in a cylindrical shape centered on the rotation axis, and the induction module can be fixed to the outer surface of the tub.

[0039] In the clothing treatment device according to an embodiment of the present invention, the first direction may be parallel to the forward-backward direction or may be a direction having an incline of 15° or less with respect to the forward-backward direction.

[0040] The above induction module may be located on the upper side of the drum.

[0041] In a garment treatment device according to an embodiment of the present invention, the working coil may be configured to intersect the first reference surface.

[0042] The above induction module may include a base housing and a magnetic base.

[0043] The above base housing is fixedly connected to the outer surface of the tub, and the working coil is accommodated in the base housing.

[0044] The magnet base is formed with a support groove in which each of the plurality of permanent magnets is accommodated, and the magnet base can be fixedly coupled to the outside of the base housing.

[0045] A clothes treatment device according to an embodiment of the present invention includes a tub, a drum, and an induction module. The induction module includes a working coil and permanent magnets. The induction module is arranged so that its center is located on a second reference plane having a predetermined angle from a first reference plane. The induction module includes a first group, which is a combination of permanent magnets arranged in a first area with respect to the second reference plane, and a second group, which is a combination of permanent magnets arranged in a second area, wherein the magnetic force of the second group is greater than the magnetic force of the first group. Each permanent magnet causes a magnetic field generated by the working coil to be concentrated in the direction of the drum, and even when the induction module is arranged asymmetrically with respect to the first reference plane, the asymmetry of the magnetic flux can be alleviated and the magnetic field and magnetic flux can be concentrated toward the drum.

[0046] In a garment treatment device according to an embodiment of the present invention, when the induction module is arranged to be inclined to one side from the upper side of the drum, noise can be prevented from increasing in the opposite direction to the inclined side.

[0047] In a garment treatment device according to an embodiment of the present invention, when a plurality of permanent magnets are formed identically, the number of permanent magnets in the second group is greater than the number of permanent magnets in the first group. The permanent magnets in the second group can concentrate the magnetic field and magnetic flux of the working coil toward the drum more than the permanent magnets in the first group, and can prevent noise from increasing due to the magnetic field.

[0048] According to a garment treatment device according to an embodiment of the present invention, when designing a garment treatment device, the constraint of having to place the induction module at the exact center of the vertical upper side of the drum can be eliminated, and the degree of freedom in the design of the garment treatment device can be improved.

[0049] FIG. 1 is a cross-sectional view schematically illustrating a garment treatment device according to one embodiment of the present invention.

[0050] FIG. 2 is a cross-sectional view schematically illustrating a garment treatment device according to one embodiment of the present invention.

[0051] FIG. 3 is a schematic drawing showing an induction module installed on the upper side of a tub in a clothing treatment device according to one embodiment of the present invention.

[0052] FIG. 4 is a diagram illustrating a partial configuration of an induction module according to one embodiment of the present invention.

[0053] FIG. 5 is a drawing showing the arrangement between a drum and an induction module in a clothing treatment device according to one embodiment of the present invention.

[0054] FIG. 6 is a drawing simulating the appearance of a magnetic field when a drum and a working coil are provided according to one embodiment of the present invention and a permanent magnet (M) is provided on the outside of the working coil.

[0055] Fig. 7a is a drawing simulating the magnetic field action when a drum and a working coil are provided as in Fig. 6 without a permanent magnet.

[0056] Fig. 7b is a drawing simulating the magnetic field applied when a drum and a working coil are provided as in Fig. 6 and permanent magnets are provided on both the left and right sides of the outer side of the working coil.

[0057] Fig. 7c is a drawing simulating the magnetic field applied when a drum and a working coil are provided as in Fig. 6 and a permanent magnet is provided only on the left side of the outer side of the working coil.

[0058] FIG. 8 is a drawing simulating the magnetic field action when a drum and a working coil are provided as in FIG. 6, and permanent magnets are provided on the left and right sides of the outer side of the working coil, but the magnetic force of the permanent magnet on the left is less than the magnetic force of the permanent magnet on the right.

[0059] FIG. 9a is a drawing simulating the magnetic field action when a drum and a working coil are provided as in FIG. 6, and permanent magnets are provided on the left and right sides of the outer side of the working coil, and the magnetic force of the permanent magnet on the left is greater than the magnetic force of the permanent magnet on the right.

[0060] Fig. 9b is a drawing that simulates the magnetic field action when a drum, a working coil, and a permanent magnet are provided as in Fig. 9a, but the magnetic force of the permanent magnet on the left is greater than in the case of Fig. 9a.

[0061] Fig. 9c is a drawing that simulates the magnetic field action when a drum, a working coil, and a permanent magnet are provided as in Fig. 9b, but the magnetic force of the permanent magnet on the left is greater than in the case of Fig. 9b.

[0062] Figure 10 is a schematic drawing showing how each permanent magnet is arranged in an induction module.

[0063] Figure 11 is a drawing showing the ratio of the number of second magnets to the number of first magnets according to the inclination angle of the induction module.

[0064] Fig. 12 is a schematic diagram illustrating a method of measuring noise of a clothing treatment device according to an embodiment of the present invention.

[0065] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, in describing the present invention, descriptions of functions or configurations already known will be omitted to clarify the gist of the present invention.

[0066] FIG. 1 is a cross-sectional view schematically illustrating a clothing treatment device (1) according to one embodiment of the present invention.

[0067] Figure 2 is a cross-sectional view schematically illustrating a clothing treatment device (1) according to one embodiment of the present invention.

[0068] FIG. 3 is a schematic drawing showing an induction module (300) installed on the upper side of a tub (100) in a clothing treatment device (1) according to one embodiment of the present invention.

[0069] A clothing treatment device (1) according to an embodiment of the present invention comprises a tub (100), a drum (200), and an induction module (300). The clothing treatment device (1) may comprise a casing (10).

[0070] In the garment treatment device (1) according to an embodiment of the present invention, the induction module (300) is configured to heat the drum (200), thereby heating water, clothing, laundry, and / or air contained inside the drum (200). Such a garment treatment device (1) may also be used under other names. For example, the garment treatment device (1) according to an embodiment of the present invention may be used as a washing machine, or as a dryer, or as a washing machine with a dryer, or as a garment manager.

[0071] The casing (10) forms the exterior of the garment treatment device (1). The casing (10) may be formed in an overall hexahedral shape. The casing (10) may be formed in various shapes other than a hexahedral shape.

[0072] An inlet for inserting clothes, laundry, etc. is formed on one side (e.g., the front) of the casing (10).

[0073] A tub (100) is arranged inside the casing (10). The tub (100) is formed in a cylindrical shape that forms a predetermined space. The tub (100) may be formed in a generally circular cylindrical shape, a polygonal cylindrical shape, etc. One side (e.g., the front) of the tub (100) is opened at a position corresponding to the inlet of the casing (10) to form an inlet.

[0074] The inside of the tub (100) can contain water.

[0075] The inlet of the tub (100) and the inlet of the casing (10) are connected to each other by a gasket (11), and the two can be sealed by the gasket (11).

[0076] The tub (100) is suspended from the upper side of the casing (10) by a spring (40) and can be supported on the lower side of the casing (10) by a damper (45). When the clothing treatment device (1) is in operation, the vibration of the tub (100) can be alleviated by the spring (40) and damper (45).

[0077] A door (20) for opening and closing the input port of the casing (10) may be provided in the clothing treatment device (1). The door (20) may be hingedly connected to the casing (10).

[0078] The garment treatment device (1) according to an embodiment of the present invention may be equipped with an adjacent component (30). The adjacent component (30) described in the embodiment of the present invention may be a component provided adjacent to the induction module (300) of the garment treatment device (1).

[0079] In designing and manufacturing a garment treatment device (1) according to an embodiment of the present invention, both the induction module (300) and the adjacent component (30) are provided at the upper portion of the garment treatment device (1), and the induction module (300) is generally located at the center portion, and the adjacent component (30) may be provided at the left or right side from the center. At this time, when the induction module (300) and the adjacent component (30) are formed to a predetermined size, they must be designed and manufactured so as not to interfere with each other.

[0080] This is an example, and there may be various design and manufacturing cases in which the induction module (300) in the clothing treatment device (1) cannot be formed at the upper center of the tub (100) and the drum (200). Even in cases where such a situation occurs, the clothing treatment device (1) according to the embodiment of the present invention ensures that the magnetic field generated by the induction module (300) is generally concentrated toward the drum (200), and also prevents noise from the working coil (310) from increasing on either side in the lateral direction. A more detailed description of this will be provided later.

[0081] In an embodiment of the present invention, the adjacent component (30) may be a dispenser.

[0082] In a garment treatment device (1), a dispenser may be provided to supply additives such as laundry detergent, fabric softener, or bleach to a tub (100). When the adjacent component (30) is a dispenser, the dispenser may include a detergent box containing the additives and a dispenser housing in which the detergent box is retractably stored.

[0083] The drum (200) is rotatably positioned inside the tub (100). The drum (200) is provided with a space (210) therein for accommodating laundry, etc. The drum (200) may be formed in a generally cylindrical shape.

[0084] The drum (200) is made of a metal material. The drum (200) may be made of a metal material. The drum (200) is made of a material that is heated in a non-contact manner by the induction module (300). That is, the drum (200) is made of a material in which a current is induced by the magnetic field (or magnetic force) of the working coil (310) of the induction module (300). The drum (200) may be made of iron. The drum (200) may be made of stainless steel.

[0085] In the garment treatment device (1) according to an embodiment of the present invention, the drum (200) may be of a front-loading type that rotates around a (generally) horizontal axis (rotation axis (a1)). However, the present invention is not limited thereto, and in the case of a top-loading type, the drum (200) may be configured to rotate around a (generally) vertical axis.

[0086] The drum (200) is rotated by a driving unit (50). The driving unit (50) may include a motor capable of controlling the direction and speed of rotation. The motor may be formed of a BLDC (Brushless Direct Current electric motor).

[0087] An induction module (300) according to an embodiment of the present invention comprises an induction heater. An induction heater is a heater that uses an induced current generated by a magnetic field as a heat source. When a drum (200) (metal) is positioned within a magnetic field generated by an induction module (300) (induction heater), an eddy current is generated in the drum (200) due to an electromagnetic induction phenomenon, and the drum (200) can be heated by Joule heat.

[0088] The induction module (300) is fixed to the tub (100) while being spaced apart from the drum (200). When the induction module (300) operates, the drum (200), which is made of metal, is heated. The tub (100) is made of a material (e.g., synthetic resin) through which a magnetic field can pass, and the induction module (300) is placed on the outside of the tub (100).

[0089] According to an embodiment, the induction module (300) may be placed inside the tub (100).

[0090] The induction module (300) can be fixedly installed on the outer surface of the tub (100), and the drum (200) inside the tub (100) can be heated by the operation of the induction module (300). When the drum (200) rotates inside the tub (100), the entire circumference of the drum (200) can be evenly heated by the induction module (300).

[0091] The drum (200) is provided to be rotatable around a rotation axis (a1) in a first direction (X) inside the tub (100). The drum (200) may be formed in a cylindrical shape around the rotation axis (a1) in the first direction (X).

[0092] In an embodiment of the present invention, the first direction (X) may be a direction substantially parallel to the horizontal direction. The first direction (X) may be completely parallel to the horizontal direction, or may be inclined at a predetermined angle with the horizontal direction. The first direction (X) may be a direction parallel to the forward-backward direction or inclined at an angle of 15° or less with the forward-backward direction.

[0093] The first direction (X), the second direction (Y), and the third direction (Z) described in the embodiment of the present invention may be directions that are orthogonal to each other.

[0094] The first direction (X) and the second direction (Y) may be directions that are generally parallel to the horizontal direction, respectively, and the third direction (Z) may be a direction that is generally parallel to the vertical direction. The first direction (X) may be a direction that is generally parallel to the front-back direction, the second direction (Y) may be a direction that is generally parallel to the left-right direction, and the third direction (Z) may be a direction that is generally parallel to the up-down direction.

[0095] FIG. 4 is a drawing showing a partial disassembled configuration of an induction module (300) according to one embodiment of the present invention.

[0096] FIG. 5 is a drawing showing the arrangement between a drum (200) and an induction module (300) in a clothing treatment device (1) according to one embodiment of the present invention.

[0097] The induction module (300) includes a working coil (310) and a plurality of permanent magnets (320). The induction module (300) may include a base housing (330) and a magnet base (340).

[0098] The working coil (310) is configured to be applied with current.

[0099] The working coil (310) may be formed in a form in which the conductor is wound around a central axis (a2) passing through the center of the working coil (310). At this time, the entire conductor forming the working coil (310) may be wound so as to be placed on a single plane or curved surface, thereby forming the working coil (310). In addition, at this time, the surface formed by the working coil (310) may be formed parallel to the outer surface of the drum (200). That is, the working coil (310) may be formed along a surface that forms a concentric circle with the drum (200).

[0100] The overall wound shape of the working coil (310) may be formed in a circular, oval, track-like shape, or may be formed in a generally rectangular shape as shown in FIGS. 4 and 5.

[0101] The length (width) of the working coil (310) in the first direction (X) may be longer (larger) than the length (width) in the first rotational direction (R1). In addition, the length (width) of the induction module (300) in the first direction (X) may be longer (larger) than the length (width) in the first rotational direction (R1).

[0102] The heating performance of the drum (200) by the working coil (310) may vary depending on the number of times the working coil (310) is wound, the gap between the working coil (310) and the drum (200), the arrangement of the permanent magnet (320), etc.

[0103] A plurality of permanent magnets (320) can be arranged close to the outside of the working coil (310) to focus the magnetic field generated by the working coil (310) toward the drum (200).

[0104] When the permanent magnets (320) are coupled to one side (e.g., the outer side) of the working coil (310), they can serve to shield a certain portion of the magnetic field leaking to the coupled side. In the garment treatment device (1) according to the embodiment of the present invention, in order to effectively heat the drum (200), the permanent magnets (320) are arranged adjacent to the outer side of the working coil (310), and when the induction module (300) is provided on the upper side of the drum (200), the permanent magnets (320) are coupled adjacent to the upper surface of the working coil (310).

[0105] The permanent magnet (320) is coupled to the opposite side of the drum (200) with respect to the working coil (310). Accordingly, the permanent magnet (320) can shield the magnetic field leaking outward from the drum (200), and the drum (200) can be effectively heated.

[0106] In an embodiment of the present invention, the permanent magnets (320) are ferromagnetic. The permanent magnets (320) may be formed by including ferrite. The permanent magnets (320) may be formed by ferrite. Since the magnetic field of the working coil (310) does not induce current in the permanent magnets (320), which are ferromagnetic, current can be concentrated in the drum (200) located on the inside (bottom) of the working coil (310), and the drum (200) can be effectively heated.

[0107] If the permanent magnet (320) is installed to shield the entire outer side of the working coil (310), the magnetic field leaking outward may be better shielded, but in this case, there are problems such as increased material costs, so the clothing treatment device (1) according to the embodiment of the present invention is configured to effectively prevent leakage of the magnetic field while minimizing an increase in the number or amount of permanent magnets (320).

[0108] The permanent magnets (320) can be arranged perpendicular to the direction in which the working coil (310) is wound. That is, the longitudinal direction of the permanent magnets (320) can be arranged so that they are perpendicular to the direction of the electric wires of each part of the working coil (310).

[0109] When current is applied to the working coil (310), a magnetic field is formed according to Ampere's law. The formed magnetic field tends to proceed in a direction generally perpendicular to the longitudinal direction of the drum (200). At this time, the direction of the magnetic field can be changed by the permanent magnet (320) of the induction module (300) mounted on the tub (100).

[0110] When the permanent magnet (320) is positioned adjacent to the outside of the working coil (310), the magnetic field formed in the working coil (310) can be influenced by the magnetic force of the permanent magnet (320). The direction in which the magnetic field changes can vary depending on the direction of the magnetic force lines of the permanent magnet (320).

[0111] It is preferable that the permanent magnet (320) be arranged perpendicular to the longitudinal direction of each wire of the working coil (310) in order to concentrate the magnetic field of the working coil (310) toward the drum (200).

[0112] Each permanent magnet (320) may be provided as a bar magnet of the same size. If the sizes of each of the permanent magnets (320) are all different, it may be difficult for the circumference of the drum (200) to be heated uniformly due to differences in magnetic force.

[0113] Each of the permanent magnets (320) may be arranged to be spaced apart from each other by a predetermined distance along the winding direction of the working coil (310). The permanent magnets (320) may be arranged to be distributed in all directions of front, back, left, and right along the winding direction of the working coil (310). If the permanent magnets (320) are arranged only at specific locations of the working coil (310), the amount of magnetic field radiated to the drum (200) may vary for each part of the outer periphery of the drum (200), making it difficult to achieve uniform heating.

[0114] The length of the permanent magnet (320) can be formed to be the same as the width of the working coil (310) (the gap between the innermost conductor and the outermost conductor of the wound working coil (310), and at this time, with respect to the center (301) of the induction module (300), the outer end of the permanent magnet (320) can be positioned directly above the outermost conductor of the working coil (310), and the inner end of the permanent magnet (320) can be positioned directly above the innermost conductor of the working coil (310). Accordingly, the efficient use of the permanent magnet (320) and the improvement of the heating performance of the drum (200) by the working coil (310) can be achieved.

[0115] The base housing (330) is configured to accommodate the working coil (310) and is fixedly connected to the tub (100).

[0116] A receiving groove (331) that fits the wound shape of the working coil (310) is formed in the base housing (330) and is fixed to the outer surface of the tub (100) using a fixing means (bolt, rivet, etc.).

[0117] The magnet base (340) is fixedly connected to the outside of the base housing (330). A plurality of support grooves (341) are formed in the magnet base (340). Each support groove (341) can be formed to suit the size and shape of each permanent magnet (320).

[0118] The base housing (330) and the magnet base (340) may be made of plastic.

[0119] On the outside of the magnet base (340), an induction cover (350) that shields the permanent magnet (320) and is fixedly connected to the magnet base (340) can be connected.

[0120] In an embodiment of the present invention, the induction module (300) may be arranged so that its center is located on a second reference plane (RS2) having a predetermined angle (θ) in the first rotational direction (R1) with respect to the rotational axis (a1) from a first reference plane (RS1) in a vertical direction (direction of gravity) passing through the rotational axis (a1) of the drum (200).

[0121] The first rotation direction (R1) may be the rotation direction of the drum (200).

[0122] The first reference plane (RS1) is an imaginary plane in the vertical direction.

[0123] The first reference plane (RS1) is a plane passing through the rotation axis (a1). That is, the rotation axis (a1) of the drum (200) is formed along the first reference plane (RS1) above the first reference plane (RS1).

[0124] When the first rotation axis (a1) is formed along the forward-backward direction (first direction (X)), the first reference plane (RS1) is a plane in the vertical direction (third direction (Z)) parallel to the forward-backward direction (first direction (X)).

[0125] The second reference plane (RS2) is an imaginary plane rotated by a predetermined angle (θ) in the first rotational direction (R1) about the rotational axis (a1) from the first reference plane (RS1). The first rotational direction (R1) may be clockwise or counterclockwise about the rotational axis (a1).

[0126] When the first rotation axis (a1) is formed along the front-back direction (first direction (X)), the first reference plane (RS1) is a plane perpendicular to the ground on which the clothing treatment device (1) is placed, and the second reference plane (RS2) is a plane that forms an incline with the ground.

[0127] The rotation angle (θ) of the second reference plane (RS2) with respect to the first reference plane (RS1) can be any angle from 3 to 20°. The rotation angle (θ) of the second reference plane (RS2) with respect to the first reference plane (RS1) can be any angle from 5 to 15°.

[0128] In an embodiment of the present invention, the induction module (300) is configured such that its center (301) is positioned on the second reference plane (RS2). As illustrated in FIG. 2, the induction module (300) may not be positioned at the exact center of the upper side of the drum (200), but may be positioned at a point rotated at a predetermined angle (θ) in the clockwise direction. At this time, the working coil (310) of the induction module (300) is positioned so as to be inclined to one side (the right side with reference to FIG. 2).

[0129] The working coil (310) is positioned so that its center is located on the second reference plane (RS2).

[0130] The working coil (310) can be divided into a first coil portion (311) and a second coil portion (312).

[0131] The first coil portion (311) is half of the working coil (310) forming the first rotation direction (F1) with respect to the second reference plane (RS2).

[0132] The second coil portion (312) is half of the working coil (310) that forms the side opposite to the first rotation direction (F1) with respect to the second reference plane (RS2).

[0133] As described above, in order to avoid interference with adjacent parts (30) when the induction module (300) is formed to a predetermined size in the clothing treatment device (1), the induction module (300) may be formed so that its center (301) is located at the second reference plane (RS2) rather than the first reference plane (RS1).

[0134] In addition, the center (301) of the induction module (300) in the clothing treatment device (1) may be located at the second reference plane (RS2) for various design reasons.

[0135] In the clothing treatment device (1) according to an embodiment of the present invention, the center of the working coil (310) may be the same point as the center (301) of the induction module (300).

[0136] In the clothing treatment device (1) according to an embodiment of the present invention, the length of the first rotation direction (R1) of the working coil (310) can be made shorter than the length of the first direction (X).

[0137] In the clothing treatment device (1) according to an embodiment of the present invention, the working coil (310) of the induction module (300) may be configured to intersect the first reference plane (RS1). At this time, the second coil portion (312) of the working coil (310) intersects the first reference plane (RS1). Even if the induction module (300) is positioned at a point rotated at a predetermined angle (θ) from the upper center of the drum (200), the working coil (310) may be configured to be positioned over the upper center of the drum (200) without departing from this point. Accordingly, the left-right imbalance of noise caused by the working coil (310) of the induction module (300) can be minimized.

[0138] In the induction module (300), the permanent magnets (320) can be divided into a first group (320a) and a second group (320b). The first group (320a) and the second group (320b) are each a combination of one or more permanent magnets (320) among the plurality of permanent magnets (320) constituting the induction module (300), and the permanent magnets (320) of the first group (320a) and the permanent magnets (320) of the second group (320b) are distinguished from each other.

[0139] The first group (320a) is a combination of one or more permanent magnets (320) arranged in a first region (t1) toward the first rotation direction (R1) with respect to the second reference plane (RS2), and the second group (320b) is a combination of one or more permanent magnets (320) arranged in a second region (t2) opposite to the first rotation direction (R1) with respect to the second reference plane (RS2).

[0140] The first group (320a) is arranged on the outside of the first coil section (311) to shield a portion of the first coil section (311).

[0141] The second group (320b) is arranged on the outside of the second coil section (312) to shield a portion of the second coil section (312).

[0142] When the first direction (X) is the forward / backward direction and the first rotational direction (R1) is clockwise, when viewed from above, the first region (t1) is the right side of the induction module (300) from the second reference plane (RS2), and the second region (t2) is the left side of the induction module (300) from the second reference plane (RS2).

[0143] In an embodiment of the present invention, the induction module (300) is tilted to one side from the first reference plane (RS1), and at this time, the first region (t1) is an region relatively farther from the first reference plane (RS1) and the second region (t2) is an region relatively closer to the first reference plane (RS1).

[0144] In an embodiment of the present invention, the magnetic force of the second group (320b) is greater than the magnetic force of the first group (320a).

[0145] In an embodiment of the present invention, the area shielded by the permanent magnet (320) in the second coil part (312) may be larger than the area shielded by the permanent magnet (320) in the first coil part (311). The area shielded by the permanent magnet (320) in the first coil part (311) is the area of ​​the first coil part (311) that is shielded by the permanent magnets (320) when viewed from the radially outer side from the rotation axis (a1). The area shielded by the permanent magnet (320) in the second coil part (312) is the area of ​​the second coil part (312) that is shielded by the permanent magnets (320) when viewed from the radially outer side from the rotation axis (a1).

[0146] In an embodiment of the present invention, the permanent magnet (320) of the induction module (300) can be formed in various ways within a range where the magnetic force of the second group (320b) is greater than the magnetic force of the first group (320a). In one embodiment, a magnet having a relatively large magnetic force may be placed in the second group (320b), and a magnet having a relatively small magnetic force may be placed in the first group (320a).

[0147] In a clothing treatment device (1) according to an embodiment of the present invention, when a plurality of permanent magnets (320) of an induction module (300) are formed to be identical to each other, the number of permanent magnets (320) of the second group (320b) may be greater than the number of permanent magnets (320) of the first group (320a).

[0148] In the clothing treatment device (1) according to an embodiment of the present invention, the plurality of permanent magnets (320) are all formed identically, and the number of permanent magnets (320) provided on the outside of the second coil part (312) may be greater than the number of permanent magnets (320) provided on the outside of the first coil part (311).

[0149] Accordingly, the radiation noise problem can be solved simply and easily.

[0150] When a plurality of permanent magnets (320) of an induction module (300) are formed identically, the combination of the number of permanent magnets (320) of the first group (320a) and the number of permanent magnets (320) of the second group (320b) may be provided as (6, 7), (6, 8), (6, 9), (7, 9), or (8, 9).

[0151] As described above, the working coil (310) can be wound around a central axis (a2) passing through the center (301) of the induction module (300).

[0152] Here, the central axis (a2) of the induction module (300) is a line passing through the second reference plane (RS2). The central axis (a2) of the induction module (300) is formed along the second reference plane (RS2) from the second reference plane (RS2) and is a line orthogonal to the rotation axis (a1).

[0153] In the induction module (300), a plurality of permanent magnets (320) may be arranged within an area formed by a working coil (310). The area formed by the working coil (310) may be a space formed by the outermost conductor of the working coil (310), or may be a space formed by the outermost conductor and the innermost conductor of the working coil (310).

[0154] In an embodiment of the present invention, a plurality of permanent magnets (320) provided in the induction module (300) can be symmetrical with respect to the third reference plane (RS3).

[0155] The third reference plane (RS3) is an imaginary plane that is perpendicular to the first reference plane (RS1) and passes through the central axis (a2).

[0156] When the first direction (X) is a direction parallel to the forward-backward direction, the first reference plane (RS1) and the third reference plane (RS3) can both be vertical planes, but the first reference plane (RS1) is parallel to the forward-backward direction and the third reference plane (RS3) is parallel to the left-right direction.

[0157] Since a plurality of permanent magnets (320) are provided symmetrically around the third reference plane (RS3), uniform heating can be achieved on the front and rear sides of the drum (200) in the axial direction.

[0158] Fig. 6 is a drawing simulating the behavior of a magnetic field when a drum (200) and a working coil (310) are provided according to one embodiment of the present invention, and a permanent magnet (M) is provided on the outside of the working coil (310). Fig. 6 is a cross-sectional drawing, and in Fig. 6, it is assumed that the drum (200) rotates clockwise.

[0159] Fig. 7a is a drawing simulating the magnetic field action when a drum (200) and a working coil (310) are provided as in Fig. 6 without a permanent magnet.

[0160] FIG. 7b is a drawing simulating the magnetic field applied when a drum (200) and a working coil (310) are provided as in FIG. 6 and permanent magnets are provided on both the left and right sides of the outer side of the working coil (310).

[0161] FIG. 7c is a drawing simulating the magnetic field applied when a drum (200) and a working coil (310) are provided as in FIG. 6 and a permanent magnet is provided only on the left side of the outer side of the working coil (310).

[0162] FIG. 8 is a drawing simulating the magnetic field action when a drum (200) and a working coil (310) are provided as in FIG. 6, and permanent magnets are provided on the left and right sides of the outer side of the working coil (310), but the magnetic force of the permanent magnet on the left is less than the magnetic force of the permanent magnet on the right.

[0163] FIG. 9a is a drawing simulating the magnetic field action when a drum (200) and a working coil (310) are provided as in FIG. 6, and permanent magnets are provided on the left and right sides of the outer side of the working coil (310), but the magnetic force of the permanent magnet on the left is greater than the magnetic force of the permanent magnet on the right.

[0164] Fig. 9b is a drawing that simulates the magnetic field action when a drum (200), a working coil (310), and a permanent magnet are provided as in Fig. 9a, but the magnetic force of the permanent magnet on the left is greater than in the case of Fig. 9a.

[0165] Fig. 9c is a drawing simulating the magnetic field action when a drum (200), a working coil (310), and a permanent magnet are provided as in Fig. 9b, but the magnetic force of the permanent magnet on the left is greater than in the case of Fig. 9b.

[0166] In each of the drawings of FIGS. 7a to 9c, the working coil (310) is positioned in the same position as in FIG. 6.

[0167] In each of the drawings of FIGS. 7a to 9c, magnetic flux lines (FL) are indicated with the working coil (310) as the center, and changes in magnetic flux density (MD) are indicated by differences in shade. The magnetic flux density (MD) is highest in the area adjacent to the working coil (310), and decreases toward the outside thereof.

[0168] In each of the drawings of FIGS. 7a to 9c, the inner lower side and lower side of the drum (200) are indicated in dark color, but this is because the distribution results of the magnetic flux density (MD) in each of the drawings of FIGS. 7a to 9c are expressed as black and white images, and as mentioned above, the magnetic flux density (MD) decreases toward the outer side of the working coil (310).

[0169] Figure 10 is a schematic drawing showing how each permanent magnet (320) is arranged in an induction module (300).

[0170] Figure 11 is a drawing showing the ratio of the number of second magnets (322) to the number of first magnets (321) according to the inclination angle of the induction module (300).

[0171] Fig. 12 is a schematic diagram illustrating a method of measuring noise of a clothing treatment device (1) according to an embodiment of the present invention.

[0172] As illustrated in Fig. 6, a working coil (310) is placed on the outside of the drum (200), and at this time, the working coil (310) is placed so that its center is located on a second reference plane (RS2) that forms a predetermined angle with the first reference plane (RS1). The working coil (310) is wound around the center (301) of the induction module (300), and the first coil part (311) on the right side of the working coil (310) and the second coil part (312) on the left side are located on both sides of the second reference plane (RS2).

[0173] The magnetic flux inside the drum (200) is affected by the rotation direction of the drum (200), and when looking at the magnetic flux lines acting inside the drum (200) in Fig. 6, it can be seen that the magnetic flux at point A and the magnetic flux at point B show different forms.

[0174] When a permanent magnet (M) is provided on the outside of the second coil portion (312) on the left side of the working coil (310), it can be seen that the magnetic flux on the outside (point C) of the permanent magnet (M) is reduced, and accordingly, it can be seen that the magnetic field can be concentrated toward the drum (200).

[0175] When a permanent magnet is not provided as in Fig. 7a and the working coil (310) is provided inclined to the right from the upper side of the drum (200), the line segment (L1) connecting the corresponding left magnetic flux line and the corresponding right magnetic flux line is inclined downward in the right direction, and the line segment (L2) connecting the corresponding left magnetic flux density point and the corresponding right magnetic flux density point is inclined downward in the right direction.

[0176] As shown in FIG. 7b, when permanent magnets are provided on both the second coil part (312) on the left side and the first coil part (311) on the right side of the outer side of the working coil (310) as compared to FIG. 7a, the radius of the magnetic flux line is reduced, and it can be seen that the line segment (L3) connecting the corresponding left magnetic flux line and the corresponding right magnetic flux line moves downwards more than the line segment (L1), and the line segment (L4) connecting the corresponding left magnetic flux density point and the corresponding right magnetic flux density point also moves downwards more than the line segment (L2).

[0177] That is, in the case of FIG. 7b, when permanent magnets are provided on both the second coil part (312) on the left side and the first coil part (311) on the right side of the outer side of the working coil (310), it can be seen that the magnetic field can be blocked from being radiated outward, compared to the case of FIG. 7a.

[0178] And when comparing the magnetic flux line (FL2) formed on the lower side of the drum (200) in the case of Fig. 7b with the magnetic flux line (FL1) formed on the lower side of the drum (200) in the case of Fig. 7a, it can be seen that the radius of the magnetic flux line (FL) has been reduced.

[0179] As shown in Fig. 7c, when a permanent magnet is provided only in the second coil portion (312) on the left side of the outer side of the working coil (310) compared to Fig. 7a, it can be seen that the line segment (L5) connecting the corresponding left magnetic flux line and the corresponding right magnetic flux line has an improved slope (closer to horizontal) than the line segment (L1), and the line segment (L6) connecting the corresponding left magnetic flux density point and the right magnetic flux density point also has an improved slope (closer to horizontal) than the line segment (L2). That is, it can be seen that the left-right imbalance of the magnetic field can be resolved.

[0180] And when comparing the magnetic flux line (FL3) formed on the lower side of the drum (200) in the case of Fig. 7c with the magnetic flux line (FL1) formed on the lower side of the drum (200) in the case of Fig. 7a, it can be seen that the radius of the magnetic flux line (FL) is further reduced.

[0181] As shown in Fig. 8, when permanent magnets are provided in the second coil part (312) on the left side and the first coil part (311) on the right side of the outer side of the working coil (310), but the magnetic force of the permanent magnet on the left side is smaller than the magnetic force of the permanent magnet on the right side, it can be seen that the slope of the line segment (L7) connecting the corresponding left magnetic flux line and the right magnetic flux line is worsened (turned on) than that of the line segment (L1), and the slope of the line segment (L8) connecting the corresponding left magnetic flux density point and the right magnetic flux density point is also worsened (turned on) than that of the line segment (L2). That is, it can be seen that the left-right imbalance of the magnetic field is more severe.

[0182] And when comparing the magnetic flux line (FL4) formed on the lower side of the drum (200) in the case of FIG. 8 with the magnetic flux line (FL2) formed on the lower side of the drum (200) in the case of FIG. 7b, it can be seen that the radius of the magnetic flux line (FL) has further increased.

[0183] As shown in Fig. 9a, when permanent magnets are provided in the second coil part (312) on the left side and the first coil part (311) on the right side of the outer side of the working coil (310), and the magnetic force of the permanent magnet on the left side is greater than the magnetic force of the permanent magnet on the right side, it can be seen that the slope of the line segment (L9) connecting the corresponding magnetic flux lines on the left side and the magnetic flux lines on the right side is improved (closer to the horizontal) than that of the line segment (L1), and the slope of the line segment (L10) connecting the corresponding points of the magnetic flux density on the left side and the magnetic flux density on the right side is also improved (closer to the horizontal) than that of the line segment (L2).

[0184] Additionally, it can be seen that the case of Fig. 9b is more improved than the case of Fig. 9a, and that Fig. 9c is more improved than Fig. 9b.

[0185] When comparing the magnetic flux line (FL5) formed on the lower side of the drum (200) in FIG. 9a, the magnetic flux line (FL6) formed on the lower side of the drum (200) in FIG. 9b, and the magnetic flux line (FL7) formed on the lower side of the drum (200) in FIG. 9c with the magnetic flux line (FL2) formed on the lower side of the drum (200) in FIG. 7b, it can be seen that the radius of the magnetic flux line (FL) is gradually reduced.

[0186] In the clothing treatment device (1) according to an embodiment of the present invention, the permanent magnet (320) of the induction module (300) is formed taking these points into consideration.

[0187] In an embodiment of the present invention, the plurality of permanent magnets (320) of the induction module (300) may include a first magnet (321) and a second magnet (322).

[0188] The first magnet (321) belongs to the first group (320a) and is one or more permanent magnets (320) that are parallel to the third reference plane (RS3).

[0189] The second magnet (322) belongs to the second group (320b) and is one or more permanent magnets (320) that are parallel to the third reference plane (RS3).

[0190] The first magnet (321) and the second magnet (322) can be formed identically to each other.

[0191] In an embodiment of the present invention, the ratio of the number of second magnets (322) to the number of first magnets (321) may be 2 to 4.

[0192] In an embodiment of the present invention, the plurality of permanent magnets (320) of the induction module (300) may include a third magnet (323) and a fourth magnet (324).

[0193] The third magnets (323) are magnets placed on one side of the third reference plane (RS3), and the fourth magnets (324) are magnets placed on the opposite side of the third magnets (323) with respect to the third reference plane (RS3).

[0194] In an embodiment of the present invention, the angle (deg) between the first reference plane (RS1) and the second reference plane (RS2) may be 5° to 15°.

[0195] In an embodiment of the present invention, the angle (deg) between the first reference plane (RS1) and the second reference plane (RS2) may be 5°, and the ratio of the number of second magnets (322) to the number of first magnets (321) may be 2.5. In an embodiment of the present invention, the angle (deg) between the first reference plane (RS1) and the second reference plane (RS2) may be 10°, and the ratio of the number of second magnets (322) to the number of first magnets (321) may be 3. In an embodiment of the present invention, the angle (deg) between the first reference plane (RS1) and the second reference plane (RS2) may be 15°, and the ratio of the number of second magnets (322) to the number of first magnets (321) may be 3.5.

[0196] The clothing treatment device (1) according to an embodiment of the present invention can be configured to satisfy a graph that passes through (10, 3) and has a slope of 1 / 10 when the size of the angle (deg) between the first reference plane (RS1) and the second reference plane (RS2) is the x-axis and the size of the ratio of the number of second magnets (322) to the number of first magnets (321) is the y-axis.

[0197] As shown in Fig. 12, by positioning an antenna (2) on one side of the clothing treatment device (1) and rotating the clothing treatment device (1) around a vertical rotation axis (a3), the peak noise radiated from the clothing treatment device (1) can be measured.

[0198] [Table 1] below is the result value of measuring the noise radiated when each permanent magnet (320) of the induction module (300) in the clothing treatment device (1) according to an embodiment of the present invention is arranged as in (a) to (g) of FIG. 10, and when the center (301) of the induction module (300) is arranged at an angle so as to be placed on the second reference plane (RS2) as in FIG. 2 and FIG. 5. The result value of each case of (a) to (g) of FIG. 10 is the value of each of (a) to (g) of [Table 1].

[0199] Number and arrangement of permanent magnets 1st measurement value [dB] 2nd measurement value [dB] (a) 64.57 1.7 (b) 60.47 0.4 (c) 61.46 6.4 (d) 65.76 5.8 (e) 58.86 7.1 (f) 58.27 0.2 (g) 65.67 1.4

[0200] In each of (a) to (g) of Fig. 10, each permanent magnet (320) is formed identically. If the number (n1) of the first magnet (321) and the number (n2) of the second magnet (322) in each of (a) to (g) of Fig. 10 are represented as (n1, n2), then in the case of Fig. 10(a) it is (2, 2), in the case of Fig. 10(b) it is (2, 3), in the case of Fig. 10(c) it is (2, 4), in the case of Fig. 10(d) it is (2, 5), in the case of Fig. 10(e) it is (3, 5), in the case of Fig. 10(f) it is (4, 5), and in the case of Fig. 10(g) it is (5, 5).

[0201] In the above [Table 1], the first measurement value is a value measured at a point spaced apart in the right direction based on each of the drawings (a) to (g) of FIG. 10 (for example, a value measured at a point spaced apart in the second direction (Y) (for example, 3 m away) from the drum (200) and the working coil (310) in FIG. 5), and the second measurement value is a value measured at a point spaced apart in the left direction based on each of the drawings (a) to (g) of FIG. 10 (for example, a value measured at a point spaced apart in the opposite direction of the second direction (Y) (for example, 3 m away) from the drum (200) and the working coil (310) in FIG. 5).

[0202] In the case of (a) of Fig. 10, the first measured value (64.5 dB) is below the required good reference value (e.g., 69 dB according to the radiation interference test standard), but the second measured value (71.7 dB) exceeds the required good reference value (e.g., 69 dB according to the radiation interference test standard), and therefore, its reduction is necessary.

[0203] Compared to the case of (a) in Fig. 10, it can be seen that (b), (c), (e), and (f) in Fig. 10 are improved by reducing the first measurement value, and it can be seen that (b), (c), (d), (e), (f), and (g) in Fig. 10 are all improved by reducing the second measurement value.

[0204] Compared to the case of (a) of Fig. 10, in the case of (d) of Fig. 10, the first measurement value slightly increased, but the first measurement value (65.7 dB) and the second measurement value (65.8 dB) show values ​​that are close to each other, so it can be seen that the imbalance has been resolved, and the first measurement value (65.7 dB) is a good value in itself.

[0205] Accordingly, as in case (d) of Fig. 10, it can be seen that excellent results are obtained when the number (n1) of the first magnet (321) and the number (n2) of the second magnet (322) are arranged as (2, 5).

[0206] As described above, the induction module (300) includes a first group (320a), which is a combination of permanent magnets (320) arranged in the first region (t1) with respect to the second reference plane (RS2), and a second group (320b), which is a combination of permanent magnets (320) arranged in the second region (t2), and the magnetic force of the second group (320b) is greater than the magnetic force of the first group (320a). Each permanent magnet (320) causes the magnetic field generated from the working coil (310) to be concentrated in the direction of the drum (200), and even when the induction module (300) is asymmetrically arranged with respect to the first reference plane (RS1), the asymmetry of the magnetic flux can be alleviated and the magnetic field and magnetic flux can be concentrated toward the drum (200).

[0207] And as described above, when the induction module (300) is placed tilted (lowered) to one side from the upper side of the drum (200), it is possible to prevent noise from increasing in the opposite direction to the tilted (lowered) side.

[0208] In addition, in an embodiment of the present invention, when all of the plurality of permanent magnets (320) are formed identically, the number of permanent magnets (320) of the second group (320b) is greater than the number of permanent magnets (320) of the first group (320a), and the permanent magnets (320) of the second group (320b) can cause the magnetic field and magnetic flux of the working coil (310) to be concentrated toward the drum (200) more than the permanent magnets (320) of the first group (320a), and can prevent noise due to the magnetic field from increasing on one side.

[0209] In addition, when designing a clothing treatment device (1), it is possible to escape the constraint of having to place the induction module (300) at the exact center of the vertical upper side of the drum (200), and to improve the degree of freedom in designing the clothing treatment device (1).

[0210] While specific embodiments of the present invention have been described and illustrated above, it will be apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should not be understood individually from the technical spirit or perspective of the present invention, and such modified embodiments should fall within the scope of the claims of the present invention.

[0211] The garment treatment device according to an embodiment of the present invention has remarkable industrial applicability in that it alleviates the asymmetry of magnetic flux and concentrates the magnetic field and magnetic flux toward the drum even when the induction modules are arranged asymmetrically.

Claims

1. Tub; A drum comprising a metal material, having a space for accommodating laundry inside, and being rotatable around a first rotational axis inside the tub; and An induction module fixedly connected to the tub, comprising a working coil configured to heat the drum through a magnetic field when current is applied, and a plurality of permanent magnets provided adjacent to the outside of the working coil; The above induction module is arranged so that its center is located on a second reference plane having a predetermined angle in the first rotational direction with respect to the rotational axis from a first reference plane that is vertical and passes through the rotational axis, The above induction module is, A first group which is a combination of one or more permanent magnets arranged in a first region toward the first rotational direction based on the second reference plane; and A second group comprising one or more permanent magnets arranged in a second region opposite to the first rotation direction based on the second reference plane; The magnetic force of the second group is greater than the magnetic force of the first group. Garment processing device.

2. In paragraph 1, When a plurality of the above permanent magnets are formed identically to each other, the number of the permanent magnets of the second group is greater than the number of the permanent magnets of the first group. Garment processing device.

3. In paragraph 1, The above working coil is formed along the second reference plane and wound around a central axis passing through the center of the induction module, A plurality of the above permanent magnets are arranged orthogonal to the direction in which the working coil is wound. Garment processing device.

4. In paragraph 3, A plurality of the above permanent magnets are arranged within the area formed by the working coil. Garment processing device.

5. In paragraph 3, The plurality of permanent magnets are symmetrical about a third reference plane that is perpendicular to the first reference plane and passes through the central axis. Garment processing device.

6. In paragraph 5, A plurality of the above permanent magnets, One or more first magnets belonging to the first group and parallel to the third reference plane; and one or more second magnets belonging to the second group and parallel to the third reference plane; The first magnet and the second magnet are each formed identically to each other, The ratio of the number of the second magnets to the number of the first magnets is 2 to 4. Garment processing device.

7. In paragraph 5, A plurality of the above permanent magnets, A third magnet placed on one side of the third reference plane; and including a fourth magnet arranged on the opposite side of the third magnet based on the third reference plane; Garment processing device.

8. In paragraph 6, The above angle (θ) is 5° to 15°, Garment processing device.

9. In paragraph 6, The above angle (θ) is 5° and the above magnification is 2.5, Garment processing device.

10. In paragraph 6, When the size of the above angle (deg) is on the x-axis and the size of the above magnification is on the y-axis, it is made to satisfy a graph that passes through (10, 3) and has a slope of 1 / 10. Garment processing device.

11. Tub; A drum comprising a metal material, having a space for accommodating laundry inside, and being rotatable around a first rotational axis inside the tub; and An induction module fixedly connected to the tub, comprising a working coil configured to heat the drum through a magnetic field when current is applied, and a plurality of permanent magnets provided adjacent to the outside of the working coil; The above-mentioned working coil is arranged so that its center is located on a second reference plane having a predetermined angle in the first rotational direction with respect to the rotational axis from a first reference plane perpendicular to the rotational axis, The above working coil is, A first coil portion facing the first rotational direction based on the second reference plane; and It is divided into a second coil part opposite to the first rotation direction based on the second reference plane; The area shielded by the permanent magnet in the second coil section is larger than the area shielded by the permanent magnet in the first coil section. Garment processing device.

12. In paragraph 11, All of the above permanent magnets are made identically, The number of permanent magnets provided on the outside of the second coil part is greater than the number of permanent magnets provided on the outside of the first coil part. Garment processing device.

13. In any one of paragraphs 1 to 12, The above drum is formed in a cylindrical shape centered on the rotation axis, The above induction module is fixed to the outer surface of the above tub, Garment processing device.

14. In any one of paragraphs 1 to 12, The above first direction is a direction parallel to the forward-backward direction or a direction having an incline of 15° or less with respect to the forward-backward direction, The above induction module is located on the upper side of the drum, Garment processing device.

15. In paragraph 14, The above-mentioned working coil intersects the first reference plane, Garment processing device.

16. In any one of paragraphs 1 to 12, The above induction module is, A base housing fixedly connected to the outer surface of the tub and housing the working coil; and A magnet base having a support groove formed to accommodate each of the plurality of permanent magnets and fixedly coupled to the outside of the base housing; Garment processing device.

Images