WO2023169155A1

WO2023169155A1 - Electromagnetic heating module and laundry treatment apparatus

Info

Publication number: WO2023169155A1
Application number: PCT/CN2023/075822
Authority: WO
Inventors: 刘凯; 于明亮; 刘晓春; 李方宇
Original assignee: 青岛海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2022-03-10
Filing date: 2023-02-14
Publication date: 2023-09-14
Also published as: CN116770565A

Abstract

An electromagnetic heating module, comprising a mounting bracket (240) and a coil (201) provided on the mounting bracket. The coil is provided with an annular structure for generating an alternating magnetic field radiating outwards. The inner periphery of the coil defines a hollow area, and an inner magnetic steel (210) used for enhancing the intensity of the alternating magnetic field is provided in the hollow area. The side of the inner magnetic steel facing the mounting bracket protrudes from the surface of the coil facing the mounting bracket, and the other side of the inner magnetic steel is at least flush with the surface of the other side of the coil. Further disclosed is a laundry treatment apparatus. According to the electromagnetic heating module, the inner magnetic steel is disposed at the inner periphery of the coil, and the inner magnetic steel at least forms a protruding structure relative to the surface of the coil on the side of the coil facing the mounting bracket, such that the intensity of the magnetic field generated in the hollow area can be enhanced, the alternating magnetic field radiating outwards of the electromagnetic heating module can cover not only an annular area of the coil but also the hollow area, and then the heating efficiency can be remarkably improved.

Description

An electromagnetic heating module and clothing processing device

Technical field

The present invention belongs to the technical field of clothing treatment devices, and specifically relates to an electromagnetic heating module and a clothing treatment device.

Background technique

In recent years, in order to solve the problem that dirt easily accumulates between the inner and outer drums of washing machines and is difficult to clean, the washing machine industry has developed non-porous inner drum washing machines, that is, there are no longer dewatering holes on the inner drum, so that the inner drum can It can hold wash water independently. Through the above method, water accumulation between the inner and outer cylinders can be avoided during the washing process, saving the amount of washing water. At the same time, it also largely avoids the accumulation of dirt between the inner and outer cylinders, thereby avoiding the inner and outer cylinders. The dirt between the outer cylinders enters the inner cylinder and contaminates the clothes, making laundry clean and hygienic. However, since there is no water between the inner cylinder and the outer cylinder during the washing process, the washing water cannot be heated by setting a heating pipe in the outer cylinder in a traditional washing machine.

In order to solve the above problems, the prior art has proposed the solution of applying an electromagnetic heating device in a washing machine to heat the wash water. For example, Chinese patent application number 201910767689.3 discloses a washing machine and a control method thereof. The washing machine includes: an inner cylinder with an independent washing chamber for holding wash water; an outer cylinder that is set outside the inner cylinder; an electromagnetic heating device. It is arranged on the side wall of the outer cylinder and corresponds to the side wall of the heated inner cylinder.

However, in the above solution, the electromagnetic heating device is energized through the internal electromagnetic coil, and then generates an alternating magnetic field that radiates outward to heat the inner cylinder to achieve the purpose of heating the wash water. However, the middle part of the electromagnetic coil is often hollowed out. The magnetic field lines of the alternating magnetic field are more concentrated in the range that the electromagnetic coil can project toward the inner cylinder. However, in the hollow area in the middle, the magnetic field lines are relatively sparse and alternating. The magnetic field strength is weak. In this case, the intensity of the alternating magnetic field acting on the inner cylinder is unevenly distributed, which affects the heating efficiency of the electromagnetic heating device.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an electromagnetic heating module and a clothes processing device that can enhance the intensity of the alternating magnetic field radiated in the hollow area of the coil.

In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

An electromagnetic heating module includes a mounting bracket and a coil arranged on the mounting bracket; the coil has an annular structure for generating an alternating magnetic field that radiates outward, and the inner periphery of the coil forms a hollow area, and the hollow An inner magnetic steel is provided in the area to enhance the intensity of the alternating magnetic field. The inner magnetic steel protrudes from the coil toward the mounting bracket on one side facing the mounting bracket. surface, the other side of the inner magnet is at least flush with the surface of the other side of the coil.

Further, the inner magnetic steel is a sheet structure with a certain thickness, and the coil is spirally wound around the outer periphery of the inner magnetic steel; the coil has a certain thickness in the thickness direction of the inner magnetic steel, and the The thickness of the inner magnetic steel is greater than the thickness of the coil.

Further, the inner magnetic steel has a certain extension length in a direction perpendicular to its thickness, and the inner magnetic steel includes:

The first inner magnetic steel piece includes two pieces, which are respectively arranged at both ends in the direction in which the length of the inner magnetic steel extends;

The second inner magnetic steel sheets include at least two pieces, are distributed along the length extension direction of the inner magnetic steel, and are arranged between the two first inner magnetic steel sheets.

Further, a bottom magnet is provided between the coil and the mounting bracket; the bottom magnet is laid on the bottom wall of the mounting bracket and has a hollow area corresponding to the hollow area on the inner circumference of the coil, and the inner magnet is convex. The part emerging from the coil surface is arranged in the hollow area of the bottom magnetic steel;

Preferably, the surface of the inner magnet facing the mounting bracket is flush with the surface of the bottom magnet facing the mounting bracket.

Further, a raised isolating rib is provided on the inside of the bottom wall of the mounting bracket. The isolating rib is arranged around the outer circumference of the inner magnet. The coil and the bottom magnet are both arranged outside the area surrounded by the isolating rib.

Further, the hollow area of the bottom magnet steel has a certain extension length, and the bottom magnet steel is composed of a plurality of bottom magnet steel sheets, and the plurality of bottom magnet steel sheets include:

The first bottom magnetic steel sheet includes four pieces, two pieces are respectively provided outside the two ends of the hollow area, and the two first bottom magnetic steel sheets located at the same end of the hollow area are axially symmetrical with respect to the length extension direction of the hollow area. distributed;

The second bottom magnetic steel sheets, including at least four pieces, are symmetrically arranged on both sides of the length extension direction of the hollow area, and the second bottom magnet steel sheets located on the same side are distributed along the length extension direction of the hollow area, and the two bottom magnet steel sheets are arranged on the same side. between the first bottom magnetic steel pieces.

Further, it also includes an outer magnetic steel arranged on the outer circumference of the coil. The outer magnetic steel includes a plurality of magnetic steel blocks with the same shape and size. The plurality of magnetic steel blocks are distributed around the outer periphery of the coil; the side wall of the mounting bracket A plurality of mounting slots are provided on the upper body, and the magnetic steel blocks are arranged in the mounting slots in one-to-one correspondence.

Further, it also includes a protective layer, the protective layer is connected to the mounting bracket, and the coil and the inner magnetic steel are packaged between the protective layer and the mounting bracket;

Preferably, the protective layer is formed by injection molding of epoxy resin on the mounting bracket.

Another object of the present invention is to provide a laundry treatment device, including an inner cylinder, at least part of which is made of a metal material that can generate eddy currents in an alternating magnetic field, and the above-mentioned electromagnetic heating module.

Further, it also includes an outer cylinder, the inner cylinder is arranged inside the outer cylinder, and the electromagnetic heating module is arranged below the outer cylinder and connected to the wall of the outer cylinder, wherein at least one side of the inner magnet and the coil is facing the outer cylinder. barrel wall setting.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

In the present invention, inner magnetic steel is arranged in the hollow area formed by the coil, and the thickness of the inner magnetic steel is greater than the thickness of the coil, which can effectively strengthen the intensity of the magnetic field radiated outward in the hollow area, and then the interaction of the electromagnetic heating module radiating outward. The variable magnetic field can not only cover the annular area covered by the coil of the annular structure, but also cover the hollow area in the middle of the coil. The intensity of the alternating magnetic field generated by the electromagnetic heating module is enhanced, which can improve the heating efficiency of the electromagnetic heating module. At the same time, the magnetic field intensity is more evenly distributed, which is conducive to providing a uniform heating effect.

In the present invention, a bottom magnet with a hollow area is arranged between the coil and the mounting bracket. The bottom magnet can shield the magnetic induction lines, so that the alternating magnetic field generated by the coil radiates in a direction away from the mounting bracket, reducing the risk of By eliminating the leakage of magnetic field, the heating efficiency can be further improved. The hollow area of the bottom magnet can avoid the part of the inner magnet that protrudes from the coil surface. At the same time, the part of the inner magnet that protrudes from the coil is surrounded by the bottom magnet. The bottom magnet can weaken the direction of the inner magnet towards the mounting bracket. The magnetic field radiated on one side makes the alternating magnetic field radiated back to the mounting bracket more concentrated.

In the present invention, the inner magnetic steel and the bottom magnetic steel are each composed of multiple magnetic steel sheets, which can reduce the size of a single magnetic steel sheet and make production easier. By designing the distribution of multiple magnetic steel sheets in the electromagnetic heating module, the number of types of magnetic steel sheets of different shapes can be minimized, thereby reducing the number of different molds required to produce magnetic steel sheets, which is beneficial to saving production costs.

In the present invention, by cooperating with the protective layer and the mounting bracket to encapsulate the coil, the internal space of the electromagnetic heating module can be sealed, thereby isolating the outside air and preventing the electromagnetic heating module from catching fire when the coil is short-circuited and ignited. Potential safety hazards and improve the working safety of the electromagnetic heating module.

Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of the drawings

The drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts. In the attached picture:

Figure 1 is an exploded view of the electromagnetic heating module in the embodiment of the present invention;

Figure 2 is a schematic structural diagram of an electromagnetic heating module in an embodiment of the present invention;

Figure 3 is a schematic structural diagram of the mounting bracket in the embodiment of the present invention;

Figure 4 is an enlarged schematic diagram of position A in Figure 3 of the present invention;

Figure 5 is an exploded view of the clothes treatment device in Embodiment 2 of the present invention.

In the picture: 100, outer cylinder; 110, cylinder wall; 200, electromagnetic heating module; 201, coil; 201A, hollow area; 210, inner magnetic steel; 211, first inner magnetic steel sheet; 212, second inner magnetic steel piece; 220, bottom magnetic steel piece; 221, first bottom magnetic steel piece; 222, second bottom magnetic steel piece; 230, outer magnet steel; 231, magnetic steel block; 240, mounting bracket; 241, bottom wall; 242. Side wall; 243. Installation groove; 244. Reinforcement groove; 245. Installation part; 246. Installation hole; 247. Wiring groove; 251. Isolation rib; 252. First separation rib; 253. Second separation rib; 260. Protection layer; 261, reinforced part; 271, first ladder; 272, second ladder; 273, third ladder.

It should be noted that these drawings and text descriptions are not intended to limit the scope of the invention in any way, but are intended to illustrate the concept of the invention for those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following examples are used to illustrate the present invention. , but are not used to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", etc. indicate the orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Embodiment 1

As shown in FIGS. 1 to 4 , this embodiment provides an electromagnetic heating module 200 that can be used in laundry processing devices such as washing machines.

Specifically, the electromagnetic heating module 200 of this embodiment includes a mounting bracket 240 and a coil 201 provided on the mounting bracket 240 . When the electromagnetic heating module 200 is working, high-frequency alternating current is passed into the coil 201, and the coil 201 can generate a high-frequency alternating magnetic field that radiates outward. The electromagnetic heating module 200 is installed in the clothes treatment device to generate a high-frequency alternating magnetic field. It can stimulate the eddy current effect in the metal clothes processing tube or other water-holding containers, causing the clothes treatment tube or other water-holding containers to heat themselves, thereby heating the water under non-contact conditions. The mounting bracket 240 is made of an insulating material that is not excited by magnetic fields, such as plastic, and will not affect the magnetic field generated by the coil 201 .

In this embodiment, the coil 201 has an annular structure, and the inner periphery of the coil 201 forms a hollow area 201A. An inner magnet 210 for enhancing the intensity of the alternating magnetic field is disposed in the hollow area 201A. The side of the inner magnet 210 facing the mounting bracket 240 protrudes from the surface of the coil 201 facing the mounting bracket 240 , and the other side of the inner magnet 210 is flush with the other side surface of the coil 201 , or also protrudes from the surface of the coil 201 other side surface.

The alternating magnetic field generated by the coil 201 itself is mainly concentrated in the annular area covered by the coil 201 and radiates to the upper and lower sides of the coil 201 . As for the hollow area 201A in the middle of the coil 201, the magnetic field intensity is significantly weakened. In the above solution, an inner magnet 210 is provided inside the hollow area 201A. The inner magnet 210 can be excited by the alternating magnetic field generated by the coil 201, so that an alternating magnetic field that radiates outward can also be generated in the hollow area 201A. The alternating magnetic field at 201A plays an enhancing role.

When the electromagnetic heating module 200 of this embodiment is working, the heated component is arranged on the side of the coil 201 facing away from the mounting bracket 240 . The upper side of the inner magnet 210 is set to be at least flush with the upper surface of the coil 201, and the lower side protrudes from the lower surface of the coil 201, so that the alternating magnetic field generated at the hollow area 201A can radiate to the upper and lower sides of the space, instead of It is enhanced only in the plane in which the coil 201 is located. In this way, the coverage area of the alternating magnetic field radiated by the electromagnetic heating module 200 on the heated component can be increased, and the heating efficiency of the electromagnetic heating module 200 can be improved. At the same time, it also makes the magnetic field intensity distribution in the coverage area more uniform, which is conducive to providing a more uniform heating effect through the electromagnetic heating module 200 .

In a further solution of this embodiment, the inner magnetic steel 210 is a sheet structure with a certain thickness, and the coil 201 is spirally wound around the outer circumference of the inner magnetic steel 210 . The coil 201 also has a certain thickness, and the thickness of the inner magnetic steel 210 is greater than the thickness of the coil 201, so that the lower surface of the inner magnetic steel 210 protrudes from the lower surface of the coil 201, and the upper surface of the inner magnetic steel 210 is at least flush with the upper surface of the coil 201. Qi structure.

In another solution of this embodiment, the inner magnetic steel can also be set in other shapes, or set up as a hollow structure inside, as long as the lower surface of the inner magnetic steel protrudes beyond the lower surface of the coil, and the upper surface is at least as close as the upper surface of the coil. Just be flush.

In this embodiment, the inner magnetic steel 210 is arranged to fill the hollow area 201A in the middle of the coil 201, and the upper surface of the inner magnetic steel 210 is preferably flush with the upper surface of the coil 201. It should be noted that the “flush” specifically means that the outer circumference of the inner magnet 210 and the inner circumference of the coil 201 are at the same level at the same position in the circumferential direction of the coil 201 .

In this arrangement, as long as the surface of the heated component is between the upper surface integrally formed by the inner magnetic steel 210 and the coil 201 If the distance between them is equal everywhere, the intensity of the magnetic field acting on the surface of the heated component can be basically consistent everywhere, thus ensuring a uniform heating effect to the greatest extent.

In this embodiment, a bottom magnet 220 is also provided between the coil 201 of the electromagnetic heating module 200 and the mounting bracket 240 . The bottom magnet 220 can shield the alternating magnetic field radiated to the lower side, reduce the leakage of the alternating magnetic field, and make the generated alternating magnetic field radiate to the upper side more concentratedly, which can further improve the heating efficiency.

Specifically, the mounting bracket 240 has a bottom wall 241 and a side wall 242 surrounding the periphery of the bottom wall 241 . The bottom magnetic steel 220 has a sheet structure and is laid on the bottom wall 241 of the mounting bracket 240 . The middle part of the bottom magnet 220 has a hollow area corresponding to the hollow area 201A on the inner circumference of the coil 201. The portion of the inner magnet 210 that protrudes from the lower surface of the coil 201 is disposed in the hollow area of the bottom magnet 220.

In the above solution, the hollow area of the bottom magnet 220 can avoid the inner magnet 210 to ensure that the upper surface of the coil 201 and the inner magnet 210 can be flush after being assembled on the mounting bracket 240 . On the other hand, the lower part of the inner magnet 210 that protrudes from the lower surface of the coil 201 is surrounded by the bottom magnet 220. The magnetic flux lines passing through the lower surface of the inner magnet 210 are guided toward the outer circumference by the bottom magnet 220, thereby weakening the The intensity of the magnetic field radiated downward by the inner magnet steel 210 is reduced, and the leakage of the magnetic field is further reduced, so that the alternating magnetic field radiated upwardly of the electromagnetic heating module 200 is further concentrated.

In the preferred solution of this embodiment, the lower surface of the inner magnet 210 is flush with the lower surface of the bottom magnet 220 , and the respective lower surfaces of the inner magnet 210 and the bottom magnet 220 are respectively attached to the bottom of the mounting bracket 240 The inner surface of wall 241. The inner surface of the bottom wall 241 of the mounting bracket 240 can be a flat surface, and there is no need to set up undulations to support the bottom magnet 220 and the inner magnet 210 respectively.

In this embodiment, a raised isolation rib 251 is provided on the inside of the bottom wall 241 of the mounting bracket 240. The isolation rib 251 is arranged around the outer periphery of the inner magnet 210. The coil 201 and the bottom magnet 220 are both arranged in the area surrounded by the isolation rib 251. outside.

In the above solution, the coil 201 is formed by winding a copper wire whose surface is covered with an insulating layer. The arrangement of the isolation rib 251 separates the coil 201 and the inner magnetic steel 210 into two independent areas. Even if the insulation on the surface of the copper wire is If the layer is damaged, the isolation ribs 251 can also be used to prevent the copper wires forming the coil 201 from coming into contact with the inner magnetic steel 210 and affecting the operation of the electromagnetic heating module 200 . At the same time, the inner magnet 210 and the bottom magnet 220 are respectively arranged on the inner and outer sides of the isolation bar 251 to facilitate positioning during the assembly process.

In a further solution of this embodiment, the inner magnet 210 and the bottom magnet 220 are both composed of a plurality of magnetic steel sheets of the same shape or different sizes. Multiple magnetic steel sheets are laid on the bottom wall 241 of the mounting bracket 240 respectively, instead of the inner magnet steel or bottom magnet steel of the entire structure. The size of a single magnetic steel sheet is reduced, which reduces the difficulty of production.

In this embodiment, the inner magnetic steel 210 is in a direction perpendicular to its thickness (specifically, the left and right directions shown in FIGS. 1 to 3 ). (above) has a certain extension length, and the overall shape of the inner magnet 210 is a long sheet with arc-shaped edges at both ends. The inner magnetic steel 210 specifically includes two magnetic steel sheets of different shapes and sizes, namely a first inner magnetic steel sheet 211 and a second inner magnetic steel sheet 212.

Among them, the first inner magnetic steel piece 211 includes two pieces, which are respectively arranged at both ends in the length extension direction of the inner magnetic steel 210. The outer profile of the first inner magnetic steel piece 211 is close to an arc shape. The second inner magnetic steel sheet 212 is a rectangular magnetic steel sheet and is disposed between the two first inner magnetic steel sheets 211. According to the overall size of the electromagnetic heating module 200 and the size of the second inner magnetic steel sheet 212, the second inner magnetic steel sheet 212 is At least two magnetic steel sheets 212 are distributed along the length direction of the inner magnetic steel 210 . In the electromagnetic heating module 200 of this embodiment, two second inner magnetic steel sheets 212 are provided.

The middle part of the bottom magnet 220 has a hollow area that matches the overall shape of the inner magnet 210 , and the hollow area also has a certain extension length along the length extension direction of the inner magnet 210 . The bottom magnet 220 is composed of a plurality of bottom magnet sheets distributed around the hollow area, specifically including two bottom magnet sheets of different shapes and sizes, namely a first bottom magnet sheet 221 and a second bottom magnet sheet 222. .

Among them, the first bottom magnetic steel sheet 221 includes four pieces, and two pieces are respectively provided outside the two ends of the hollow area. The outer profile of the first bottom magnetic steel sheet 221 is close to a quarter ring. The two first bottom magnetic steel sheets 221 located at the same end of the hollow area are axially symmetrically distributed with respect to the length extension direction of the hollow area, so that the two first bottom magnetic steel sheets 221 are axially symmetrical. The first bottom magnetic steel sheet 221 forms a half-ring shape.

The second bottom magnetic steel sheet 222 is a rectangular magnetic steel sheet, which can be divided into two groups symmetrically arranged on both sides of the length extension direction of the hollow area. The second bottom magnetic steel sheet 222 belonging to the same group is arranged on the two ends of the same side. between the first bottom magnetic steel pieces 221. According to the overall size of the electromagnetic heating module 200 and the size of the second bottom magnetic steel sheets 222, each group of second bottom magnetic steel sheets 222 is provided with at least two pieces distributed along the length extension direction of the hollow area. In the electromagnetic heating module 200 of this embodiment, two second bottom magnetic steel sheets 222 are respectively provided on both sides of the hollow area, that is, a total of four second bottom magnetic steel sheets 222 are provided.

In this embodiment, the above-mentioned distribution method of the magnetic steel sheets is adopted, so that only four magnetic steel sheets of different shapes and sizes are needed to form the inner magnet 210 and the bottom magnet 220, and only four specifications of molds are needed during production. Helps save production costs.

Furthermore, in this embodiment, there is a gap between the first inner magnetic steel sheet 211 and the second inner magnetic steel sheet 212, and there is also a gap between the first bottom magnetic steel sheet 221 and the second bottom magnetic steel sheet 222, and The above two intervals are flush.

In this embodiment, protruding partition ribs are also provided on the bottom wall 241 of the mounting bracket 240 . Specifically, the separation ribs include first separation ribs 252 and second separation ribs 253 , the extension directions of both of which are perpendicular to the length extension direction of the inner magnetic steel 210 .

Among them, the first dividing bar 252 is arranged inside the area surrounded by the isolating bar 251, dividing the inside of the isolating bar 251 into four mutually independent areas, and each of the first inner magnetic steel sheet 211 and the second inner magnetic steel sheet 212 is independently Assembled in one of the inside the area. The second separating rib 253 is disposed between the isolating rib 251 and the side wall 242 of the mounting bracket 240 to separate the annular area between the two into eight mutually independent areas. Each of the first bottom magnetic steel sheet 221 and the second bottom magnetic steel sheet 221 The magnetic steel sheets 222 are independently assembled inside one of the regions.

In the above solution, through the arrangement of the first dividing ribs 252 and the second dividing ribs 253, multiple independent installation spaces are separated on the bottom wall 241 of the mounting bracket 240. When installing each magnetic steel sheet, each magnetic steel sheet can be aligned separately. By positioning, it is easier to accurately assemble the multiple magnetic steel sheets that make up the inner magnet 210 and the bottom magnet 220 .

In a further solution of this embodiment, the electromagnetic heating module 200 further includes an outer magnet 230 arranged on the outer periphery of the coil 201 . By surrounding the outer circumference of the coil 201, the outer magnetic steel 230 can shield the alternating magnetic field radiated to the outer circumference of the coil 201, reduce the leakage of the magnetic field to the outer circumference of the coil 201, and make the alternating magnetic field more concentrated towards the electromagnetic heating module 200. Radiating from the upper side.

Specifically, the outer magnet 230 includes a plurality of magnet steel blocks 231 with the same shape and size. The magnet steel blocks 231 are specifically in the shape of a rectangular parallelepiped. The plurality of magnet steel blocks 231 are distributed around the periphery of the coil 201 . A plurality of mounting slots 243 are provided on the side wall 242 of the mounting bracket 240, and the magnetic steel blocks 231 are arranged in the mounting slots 243 in one-to-one correspondence.

In the above solution, the outer magnet 230 is composed of multiple small-volume magnet steel blocks 231, and the shape and size of each magnet steel block 231 are uniform, and can be produced using molds of the same specifications, avoiding the need to follow the outer peripheral shape of the coil 201. The trouble of designing multiple molds.

In this embodiment, the side wall 242 of the mounting bracket 240 has a certain thickness, the mounting groove 243 is disposed between the inner periphery and the outer periphery of the side wall 242 , and the opening of the mounting groove 243 is disposed on the upper surface of the side wall 242 . At the left and right ends of the mounting bracket 240, the inner peripheral surface of the side wall 242 is a smooth arc surface, which matches the outer periphery of the internal coil 201. The outer peripheral surface of the side wall 242 is formed by a plurality of connected planes that are deflected at a certain angle in sequence, thereby matching the shape of the plurality of magnetic steel blocks 231 .

Further, the wiring terminals (not shown in the figure) connected to the coil 201 pass out of the electromagnetic heating module 200 from the side wall 242 of the mounting bracket 240 . Specifically, the side wall 242 is provided with a notch, and a wiring groove 247 connecting the inner and outer sides of the side wall 242 is provided at the notch. Correspondingly, the magnetic steel block 231 constituting the outer magnetic steel 230 is not installed at the position corresponding to the wiring groove 247 on the outer periphery of the coil 201 .

In a further solution of this embodiment, the electromagnetic heating module 200 also includes a protective layer 260. The protective layer 260 is disposed above the coil 201 and is connected to the mounting bracket 240. The coil 201 is connected to the inner magnetic steel 210, the bottom magnetic steel 220 and the outer magnetic steel. Steel 230 is encapsulated between protective layer 260 and mounting bracket 240 .

In the specific solution of this implementation, the protective layer 260 is made of high-temperature resistant epoxy resin. During installation, first assemble the coil 201, the inner magnet 210, the bottom magnet 220 and the outer magnet 230 at the corresponding positions on the installation bracket 240, and then inject epoxy into the upper layer. The resin is encapsulated, and after the epoxy resin is cured, a protective layer 260 covering the mounting bracket 240 is formed.

In the above solution, the coil 201 and various magnets inside the mounting bracket 240 are packaged by the protective layer 260 , thereby realizing the sealing of the space between the protective layer 260 and the mounting bracket 240 , so that the inside of the electromagnetic heating module 200 The space is isolated from the outside air. In this case, even if a short-circuit fault occurs in the coil 201 and ignition occurs, since the air inside the electromagnetic heating module 200 is extremely thin, combustion will basically not occur, thereby avoiding a fire accident in the electromagnetic heating module 200 . The arrangement of the protective layer 260 eliminates possible safety hazards, improves the working safety of the electromagnetic heating module 200, and makes the electromagnetic heating module 200 comply with safety standards.

Furthermore, in this embodiment, a reinforcing groove 244 that is concave in the inner surface of the mounting groove 243 is provided on the inner wall of the mounting groove 243 on the mounting bracket 240. The reinforcing groove 244 is specifically provided on the outer peripheral surface close to the side wall 242 of the mounting bracket 240. side. The epoxy resin used to form the protective layer 260 can penetrate into and fill each reinforcing groove 244 before curing, so that the cured protective layer 260 has a plurality of reinforced portions 261 spaced around its periphery.

In the above solution, a reinforcing groove 244 is provided on the mounting bracket 240, and the epoxy resin penetrates into the reinforcing groove 244 to form a reinforcing portion 261, thereby increasing the contact area between the protective layer 260 and the mounting bracket 240, making the protective layer 260 and the mounting bracket 240 It is more firmly connected into one body and avoids the protective layer 260 from falling off.

Furthermore, the side wall 242 of the mounting bracket 240 has a stepped structure along its thickness direction. Specifically, the side close to the outer peripheral surface of the side wall 242 is the first step 271 with the highest height, and the entire protective layer 260 is located within the area surrounded by the first step 271 . There is a second step 272 whose height is reduced to a certain extent on the inside of the first step 271 , and the upper opening of the reinforcing groove 244 is located on the upper surface of the second step 272 . There is a third step 273 with a further reduced height inside the second step 272. The upper opening of the installation groove 243 is located on the upper surface of the third step 273. When the magnetic steel block 231 is assembled in the installation groove 243, the magnetic steel block 231 is The upper surface is flush with the upper surface of the third step 273 .

In the electromagnetic heating module 200 of this embodiment, an inner magnetic steel 210 with a thickness greater than the thickness of the coil 201 is provided in the middle hollow area 201A of the coil 201, which can strengthen the alternating magnetic field intensity in the hollow area 201A and enhance the heating efficiency of the electromagnetic heating module 200. At the same time, the inner magnetic steel 210 can also improve the uniformity of the alternating magnetic field intensity distribution, which is conducive to the electromagnetic heating module 200 providing a uniform heating effect.

Bottom magnets 220 and outer magnets 230 are respectively provided below and around the coil 201, which can shield the magnets radiating to the lower and outer sides of the coil 201, reduce magnetic field leakage, and make the alternating magnetic field radiate to the upper side more concentratedly, thus Acts more concentrated on the heated parts. By optimizing the distribution of the inner magnetic steel 210, the bottom magnetic steel 220 and the outer magnetic steel 230, the trouble of producing a whole large volume of magnetic steel can be avoided, and the number of required molds of different specifications can also be reduced, which is beneficial to saving production costs. .

The uppermost layer of the electromagnetic heating module 200 is encapsulated by injecting high-temperature resistant epoxy resin to isolate the internal coil 201 from the external ambient air. This can prevent the electromagnetic heating module 200 from catching fire and improve work safety.

Embodiment 2

As shown in FIGS. 1 to 5 , this embodiment provides a clothes treatment device, including the electromagnetic heating module 200 described in the first embodiment. The clothes processing device described in this embodiment includes but is not limited to a washing machine, an all-in-one washer-dryer, and the like.

Specifically, the laundry treatment device includes an inner cylinder (not shown in the figure), at least part of which is made of a metal material that can generate eddy currents in an alternating magnetic field. When the electromagnetic heating module 200 is powered on, it generates an alternating magnetic field that radiates toward the inner cylinder, causing the inner cylinder to heat up, thereby achieving the purpose of heating the wash water in the inner cylinder.

In detail, the electromagnetic heating module 200 is arranged below the inner cylinder. The cylinder wall of the inner cylinder is at least partially made of metal material. The part of the cylinder wall made of metal material generates heat due to the eddy current effect under the excitation of the electromagnetic heating module 200, thereby causing The wash water in the inner cylinder is heated. Preferably, the walls of the inner cylinder are all made of metal materials. During the rotation of the inner cylinder, when each part of the cylinder wall rotates to a position close to the electromagnetic heating module 200, it can be excited by the electromagnetic heating module 200 and generate heat. This results in higher heating efficiency.

In another solution of this embodiment, the wall of the inner cylinder can be made of insulating material, and lifting ribs or other additional modules made of metal materials are provided on the wall of the inner cylinder. The lifting ribs or other The additional module generates heat under the stimulation of the electromagnetic heating module 200 to heat the wash water in the inner cylinder.

Furthermore, the clothes treatment device of this embodiment further includes an outer cylinder 100, and the inner cylinder is disposed inside the outer cylinder 100. Preferably, the inner tub of the washing machine of this embodiment can independently hold wash water during washing. Specifically, there is no dewatering hole on the wall of the inner cylinder, which is closed during the washing process and can independently hold wash water. A drainage hole is provided on the wall of the inner cylinder. The drainage hole is blocked by the sealing component during the washing process. When the inner cylinder reaches a certain rotation speed, the sealing component can open the drainage hole under the action of centrifugal force to discharge the wash water. The outer cylinder 100 is connected with the drainage structure, and the water discharged from the inner cylinder enters the outer cylinder 100 and then is discharged from the washing machine through the drainage structure.

In this embodiment, the wall of the inner cylinder is made of metal, and the outer cylinder 100 is made of plastic material that does not induce eddy current effects in a magnetic field. An electromagnetic heating module 200 is installed on the outside of the outer cylinder 100, and a high-frequency alternating magnetic field can be generated by passing high-frequency alternating current to the coil 201 inside the outer cylinder 100. The electromagnetic induction lines of the high-frequency alternating magnetic field can penetrate the outer cylinder 100 and act on the inner cylinder wall made of metal, causing the inner cylinder wall to generate eddy currents under the action of electromagnetic induction. The eddy currents overcome the force of the inner cylinder wall. When the internal resistance flows, the conversion of electrical energy into thermal energy is completed, and the inner cylinder wall is heated, thereby heating the washing water in it.

In a further solution of this embodiment, the electromagnetic heating module 200 is arranged below the outer cylinder 100 and connected with the cylinder wall of the outer cylinder 100 110 connections.

Specifically, the bottom wall 241 of the mounting bracket 240 has a mounting portion 245 extending toward the outer circumferential direction of the side wall 242 of the mounting bracket 240. The mounting portion 245 is provided with a mounting hole 246. The mounting portions 245 are provided at the left and right ends of the side wall 242 and further extend toward both ends respectively. Each mounting portion 245 is provided with a mounting hole 246 at the front and rear. The electromagnetic heating module 200 is connected to the cylinder wall 110 of the outer cylinder 100 through the mounting hole 246 on the mounting part 245, so that the electromagnetic heating module 200 is installed on the outer cylinder 100.

In the above solution, the electromagnetic heating module 200 is arranged below the outer barrel 100 and does not come into direct contact with the washing water during operation of the washing machine, which reduces the safety hazard caused by the contact between the coil 201 and the water. On the other hand, the electromagnetic heating module 200 can focus on heating the bottom area of the inner cylinder, that is, the part where the wash water is concentrated, and the heating efficiency is higher.

In this embodiment, the side of the inner magnet 210 and the coil 201 in the electromagnetic heating module 200 is arranged toward the cylinder wall 110 of the outer cylinder 100, and the overall upper surface formed by the coil 201 and the inner magnet 210 is in line with the inner cylinder. The arc surface of the cylinder wall is coaxial. In this case, the distance between the entire upper surface and the wall of the inner cylinder is equal, which is conducive to uniform heating of the wall of the inner cylinder.

In the preferred solution of this embodiment, the extension length of the electromagnetic heating module 200 along the circumferential direction of the outer cylinder 100 is greater than its extension length along the radial direction of the outer cylinder 100 . The electromagnetic heating module 200 extends along the circumferential direction of the outer cylinder 100 to increase the heating area, thereby eliminating the need to occupy a large area in the radial direction of the outer cylinder 100 .

In this embodiment, the electromagnetic heating module 200 is installed at the lowest position of the cylinder wall 110 of the outer cylinder 100 to achieve optimal heating effect, and some other structures, such as the drain outlet on the outer cylinder 100, also need to be installed at the lowest position of the cylinder wall 110. By reducing the extension length of the electromagnetic heating module 200 along the radial direction of the outer cylinder 100, it can be prevented from occupying too much space at the lowest part of the cylinder wall 110 of the outer cylinder 100 and affecting the arrangement of structures such as drainage outlets. The electromagnetic heating module 200 extends upward around the outer cylinder 100 to provide a larger heating area, thereby achieving higher heating efficiency.

The clothes processing device of this embodiment is provided with an electromagnetic heating module 200 to heat the wash water, thereby achieving a non-contact heating effect with the wash water. The electromagnetic heating module 200 is arranged below the outer cylinder 100. It never comes into contact with the washing water during operation of the washing machine, which reduces the safety hazard caused by the contact of the coil 201 with the washing water. At the same time, it can heat the part of the bottom of the inner cylinder that is in contact with the washing water, improving the heating efficiency. higher. The coil 201 inside the electromagnetic heating module 200 and the inner magnetic steel 210 form an upward arc surface, which is parallel to the surface of the inner cylinder wall, which can achieve a uniform heating effect. The electromagnetic heating module 200 extends in the circumferential direction of the outer cylinder 100 to provide a larger heating area, and does not have an excessively long extension length in the radial direction of the outer cylinder 100 to avoid occupying too much space at the lowest part of the cylinder wall 110 of the outer cylinder 100 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Preferred embodiments have been disclosed above, but this is not intended to limit the present invention. Any skilled person familiar with this patent can make some changes or modifications using the technical content of the above tips without departing from the scope of the technical solution of the present invention. Equivalent embodiments with equivalent changes, but any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the present invention, as long as they do not deviate from the content of the technical solution of the present invention.

Claims

An electromagnetic heating module includes a mounting bracket and a coil arranged on the mounting bracket; the coil has an annular structure for generating an alternating magnetic field that radiates outward, and the inner periphery of the coil forms a hollow area, characterized in that , an inner magnetic steel is provided in the hollow area to enhance the intensity of the alternating magnetic field. One side of the inner magnetic steel facing the mounting bracket protrudes from the surface of the coil facing the mounting bracket, and the other side of the inner magnet is at least in contact with the coil. The other side surface is flush.
The electromagnetic heating module according to claim 1, wherein the inner magnetic steel is a sheet structure with a certain thickness, and the coil is spirally wound around the outer periphery of the inner magnetic steel; the coil is spirally wound around the inner magnetic steel. The steel has a certain thickness in the thickness direction, and the thickness of the inner magnetic steel is greater than the thickness of the coil.
The electromagnetic heating module according to claim 2, characterized in that the inner magnetic steel has a certain extension length in a direction perpendicular to its thickness, and the inner magnetic steel includes:

The first inner magnetic steel piece includes two pieces, which are respectively arranged at both ends in the direction in which the length of the inner magnetic steel extends;

The second inner magnetic steel sheets include at least two pieces, are distributed along the length extension direction of the inner magnetic steel, and are arranged between the two first inner magnetic steel sheets.
The electromagnetic heating module according to claim 2 or 3, characterized in that a bottom magnetic steel is provided between the coil and the mounting bracket; the bottom magnetic steel is laid on the bottom wall of the mounting bracket and has an inner circumference with the coil. The hollow area corresponding to the hollow area, the part of the inner magnetic steel protruding from the coil surface is arranged in the hollow area of the bottom magnetic steel;

Preferably, the surface of the inner magnet facing the mounting bracket is flush with the surface of the bottom magnet facing the mounting bracket.
The electromagnetic heating module according to claim 4, characterized in that a raised isolating rib is provided on the inside of the bottom wall of the mounting bracket, the isolating rib is arranged around the outer circumference of the inner magnetic steel, and the coil and the bottom magnetic steel are evenly spaced. Set outside the area enclosed by the isolation ribs.
The electromagnetic heating module according to claim 4 or 5, characterized in that the hollow area of the bottom magnet steel has a certain extension length, and the bottom magnet steel is composed of a plurality of bottom magnet steel sheets, and the plurality of bottom magnet steel sheets include:

The first bottom magnetic steel sheet includes four pieces, two pieces are respectively provided outside the two ends of the hollow area, and the two first bottom magnetic steel sheets located at the same end of the hollow area are axially symmetrical with respect to the length extension direction of the hollow area. distributed;

The second bottom magnetic steel sheets, including at least four pieces, are symmetrically arranged on both sides of the length extension direction of the hollow area, and the second bottom magnet steel sheets located on the same side are distributed along the length extension direction of the hollow area, and the two bottom magnet steel sheets are arranged on the same side. between the first bottom magnetic steel pieces.
The electromagnetic heating module according to any one of claims 1 to 6, characterized in that it also includes an outer magnetic steel arranged on the outer circumference of the coil, and the outer magnetic steel includes a plurality of magnetic steel blocks with the same shape and size, A plurality of magnetic steel blocks are distributed around the outer circumference of the coil; a plurality of mounting slots are provided on the side wall of the mounting bracket, and the magnetic steel blocks are arranged in the mounting slots in one-to-one correspondence. Inside.
The electromagnetic heating module according to any one of claims 1 to 7, further comprising a protective layer connected to the mounting bracket, and the coil and the inner magnetic steel are encapsulated between the protective layer and the mounting bracket. ;

Preferably, the protective layer is formed by injection molding of epoxy resin on the mounting bracket.
A laundry treatment device, including an inner cylinder, at least part of which is made of a metal material that can generate eddy currents in an alternating magnetic field, characterized in that it also includes the method described in any one of claims 1-8. Electromagnetic heating module.
The clothes processing device according to claim 9, further comprising an outer cylinder, the inner cylinder is disposed inside the outer cylinder, and the electromagnetic heating module is disposed below the outer cylinder and connected to the cylinder wall of the outer cylinder, wherein the inner magnetic At least one side of the steel and the coil that is flush with the coil is positioned toward the cylinder wall of the outer cylinder.