Motor for range hood and range hood

Abstract

The utility model discloses a motor used for a range hood and the range hood. The motor used for the range hood comprises a housing; the rotating shaft extends out of the shell from the interior of the shell; the first motor sub-module comprises a first rotor, a stator iron core arranged on the periphery of the first rotor in a sleeving mode and a first winding arranged in the stator iron core, and the rotating shaft penetrates through the first rotor and is fixed to the first rotor; the motor further comprises second motor sub-modules which are arranged at the two ends, in the axial direction of the motor, of the first motor sub-module respectively, each second motor sub-module comprises a second winding and a second rotor matched with the second winding, and the rotating shaft penetrates through the second motor sub-modules and is fixed to the second rotors.

Description

TECHNICAL FIELD

[0001] The utility model relates to power device especially a kind of motor for range hood and range hood applied with the motor. BACKGROUND

[0002] Range hood has become one of indispensable kitchen household appliances in modern family. Range hood works by using fluid dynamics principle, and oil fume is sucked and discharged by centrifugal fan installed inside range hood, and filter screen is used to filter part of oil particles.

[0003] Fan of range hood is commonly driven by motor. For example, a motor for a household appliance disclosed in Chinese patent with application number 202421209270.9 includes: a shaft; a stator fixedly arranged around the shaft; a rotor arranged to be able to rotate around the stator and the shaft, the rotor includes a first end wall located axially outside the stator, the first end wall is provided with a first rotor opening, the shaft passes through the first rotor opening; and a blocking piece fixedly arranged around the shaft and enclosing the first rotor opening, which can prevent oil fume from entering and accumulating in the motor for the household appliance implemented as a range hood. For example, a low-noise plastic-sealed motor for range hood disclosed in Chinese patent with application number 202321283526.6 includes a motor plastic-sealed shell and upper and lower cover plates respectively arranged above and below the motor plastic-sealed shell, the upper cover plate is provided with a rotating shaft, the rotating shaft is connected with a rotor assembly in the middle, and a stator core is installed on the inner surface of the motor plastic-sealed shell outside the rotor assembly.

[0004] The above-mentioned conventional motor for range hood is single inner rotor or outer rotor to realize conversion of electric energy and mechanical energy, and motor performance is proportional to motor volume. If high-performance motor is needed, high core height or large core cross-sectional area must be added, which is manifested as motor strip shape or disc shape, and requires sufficient space for installation. However, first, range hood has developed to a certain stage, and in addition to the function of sucking oil fume, it also has the function of decorating kitchen, and needs to release more cooking space, so that the new form of range hood is destined to have small volume; second, the volume of range hood is reduced, and the performance demand is improved, which requires that the performance of motor must be improved a lot to meet the index; finally, the overall cost of motor needs to be controlled, and the maximum power is improved with the least resources.

[0005] Therefore, further improvement of motor is needed. UTILITY MODEL CONTENTS

[0006] The first technical problem to be solved by the utility model is to provide a motor for range hood to improve power density of motor and meet performance requirements in view of the above-mentioned deficiencies of prior art.

[0007] The second technical problem to be solved by the utility model is to provide a range hood using the above motor.

[0008] The utility model solves the above first technical problem adopts the technical scheme of a motor for range hood, including:

[0009] The shell;

[0010] The rotating shaft extends from the shell to the outside of the shell;

[0011] The first motor sub-module includes a first rotor, a stator core sleeved on the outer periphery of the first rotor, and a first winding arranged inside the stator core, and the rotating shaft passes through the first rotor and is fixed with each other; characterized in that:

[0012] The motor further includes a second motor sub-module arranged at both ends of the first motor sub-module along the motor axial direction respectively, and each second motor sub-module includes a second winding and a second rotor matched with the second winding, and the rotating shaft passes through the second motor sub-module and is fixed with the second rotor.

[0013] By adding two modules, a composite three-rotor motor is formed, torque is output through the same rotating shaft, and the whole still presents as an internal rotor motor to the outside, which plays a good protection on the inside, and is equivalent to three motors working together in terms of motor performance, so that the power density is improved on the basis of the original, and the performance is improved.

[0014] Preferably, the structure of the first rotor is that the first rotor includes a first rotor disc and a first magnetic steel, and the first magnetic steel is fixedly installed inside the first rotor disc.

[0015] Preferably, in order to reduce the overall height of the motor, the second winding includes a PCB board and a printed winding generating axial magnetic flux, the printed winding is printed on the PCB board, and the second rotor and the second winding are arranged along the motor axial direction.

[0016] Preferably, in order to reduce the mutual interference of the stators, the printed winding is located on the side of the second winding away from the stator core, the second rotor includes a second rotor disc and a second magnetic steel arranged on the side of the second rotor disc facing the second winding.

[0017] In order to facilitate the fixation of the stator core and the second winding, the motor further includes an inner machine shell arranged in the shell, and the stator core and the second winding are fixed in the inner machine shell respectively.

[0018] Preferably, the structure of the shell is that the shell comprises a first end cover and a second end cover, the first end cover comprises a first end plate, a first peripheral wall formed at the periphery of the first end plate, and a first skirt formed at the periphery of the first peripheral wall, the first skirt is located at the end of the first peripheral wall away from the first end plate and extends radially outward from the end of the first peripheral wall, the second end cover comprises a second end plate, a second peripheral wall formed at the periphery of the second end plate, and a second skirt formed at the periphery of the second peripheral wall, the second skirt is located at the end of the second peripheral wall away from the second end plate and extends radially outward from the end of the second peripheral wall, the first peripheral wall and the second peripheral wall extend oppositely and have the same radial dimension, and the first skirt and the second skirt are fitted, thereby forming a space for accommodating the first motor sub-module and the second motor sub-module between the first end plate, the first peripheral wall, the second end plate and the second peripheral wall.

[0019] Preferably, in order to facilitate stable rotation of the rotating shaft, a through hole is formed in the middle of the first end plate for the one end of the rotating shaft to pass out, the other end of the rotating shaft abuts against the inner side of the second end plate, a first bearing is arranged at the position where the rotating shaft cooperates with the first end plate, a second bearing is arranged at the position where the rotating shaft cooperates with the second end plate, the first bearing is located at the inner side of the first end plate, and the second bearing is located at the inner side of the second end plate.

[0020] The technical scheme adopted by the utility model to solve the second technical problem is: a range hood characterized by application of the motor as described above.

[0021] Compared with the prior art, the utility model has the advantages that: two modules are additionally arranged to form a composite three-rotor motor, torque is output through the same rotating shaft, the whole still presents as one internal rotor motor to the outside, good protection is provided to the inside, three motors work together in terms of motor performance, power density is improved on the basis of the original, and performance is improved; the additionally arranged axial flux motor sub-module uses PCB winding to form a disc motor module, power density of the motor can be improved without changing the volume much, and performance requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 FIG. 1 is a schematic diagram of the motor of the utility model embodiment;

[0023] Fig. 2 FIG. 2 is an exploded structural schematic diagram of the motor of the utility model embodiment;

[0024] Fig. 3 FIG. 3 is a sectional view of the motor of the utility model embodiment. DETAILED DESCRIPTION

[0025] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and since the embodiments disclosed in the present application can be arranged in different directions, these orientation-indicating terms are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0027] Referring to Figs. 1-3 A motor, mainly used in a range hood, as a driving power of a fan of the range hood.

[0028] The motor comprises a first end cover 1, a second end cover 2, a rotating shaft 3, a stator core 4, a first winding 51, a first rotor 52, a second winding 61, a second rotor 62 and an inner machine shell 7, the stator core 4, the first winding 51, the first rotor 52, the second winding 61, the second rotor 62 and the inner machine shell 7 are arranged in a containing space formed by the first end cover 1 and the second end cover 2, and the rotating shaft 3 extends from the containing space to the outside of the containing space.

[0029] The first end cover 1 is an integral structure, comprising a first end plate 11 in a substantially circular shape, a first peripheral wall 12 formed on the periphery of the first end plate 11, and a first skirt 13 formed on the periphery of the first peripheral wall 12, the first skirt 13 being located at the end of the first peripheral wall 12 away from the first end plate 11 and extending radially outward from the end of the first peripheral wall 12. The second end cover 2 is also an integral structure, comprising a second end plate 21 in a substantially circular shape, a second peripheral wall 22 formed on the periphery of the second end plate 21, and a second skirt 23 formed on the periphery of the second peripheral wall 22, the second skirt 23 being located at the end of the second peripheral wall 22 away from the second end plate 21 and extending radially outward from the end of the second peripheral wall 22. The first end plate 11 and the second end plate 21 are arranged at intervals, the first peripheral wall 12 and the second peripheral wall 22 extend towards each other and have the same radial dimension, and the first skirt 13 and the second skirt 23 are in abutment, thereby forming a space for accommodating other components of the motor between the first end plate 11, the first peripheral wall 12, the second end plate 21 and the second peripheral wall 22. The two skirts in abutment are used for external mounting, such as fixing with the volute of the fan. Thus, the first end cover 1 and the second end cover 2 form the outer shell of the motor.

[0030] A through hole 111 is formed in the middle of the first end plate 11 for the one end of the rotating shaft 3 to pass through. The other end of the rotating shaft 3 abuts against the inner side of the second end plate 21. The rotating shaft 3 is provided with a first bearing 31 at the position where it cooperates with the first end plate 11, and a second bearing 32 at the position where it cooperates with the second end plate 21, so that the rotating shaft 3 can stably rotate relative to the two end covers. The first bearing 31 is located on the inner side of the first end plate 11, and the second bearing 32 is located on the inner side of the second end plate 21, the inner side being the side facing the accommodating space.

[0031] The stator core 4 is in a substantially hollow cylindrical shape, and the first winding 51 has multiple groups and is fixedly installed inside the stator core 4, which can be achieved by forming multiple holes for accommodating the first winding 51 on the stator core 4 in the circumferential direction. The first rotor 52 comprises a first rotor disc 521 and first magnetic steel 522, the first rotor disc 521 is in a substantially hollow cylindrical shape, and the first magnetic steel 522 is fixedly installed inside the first rotor disc 521, which can also be achieved by forming multiple holes for accommodating the first magnetic steel 522 on the first rotor disc 521 in the circumferential direction. The rotating shaft 3 passes through the middle of the first rotor disc 521, the inner diameter of the first rotor disc 521 is adapted to the outer diameter of the rotating shaft 3, and the two are fixed. The stator core 4 is sleeved on the outer periphery of the first rotor disc 521, the outer diameter of the first rotor disc 521 is adapted to the inner diameter of the stator core 4, and there can only be a movement gap between the two. The inner motor shell 7 is in a hollow cylindrical shape, the outer periphery of the stator core 4 can be in abutment and fixed with the inner wall of the inner motor shell 7, and the inner motor shell 7 can be in abutment and fixed with the first peripheral wall 12 and the second peripheral wall 22.

[0032] Thus, the stator core 4, the first winding 51, and the first rotor 52 constitute the first motor sub-module, similar to the existing conventional internal rotor radial flux motor module.

[0033] The second winding 61 and the second rotor 62 constitute a second motor submodule. There are two of these submodules, respectively arranged on both axial sides of the stator core 4. Stepped portions 71 are formed on the inner sides of both axial ends of the inner housing 7. The second winding 61 is a PCB winding, including a disc-shaped or annular PCB board 611 and a printed winding 612 printed on the PCB board 611. The printed winding 612 is located on the side of the PCB board 611 away from the stator core 4. The periphery of the PCB board 611 can abut against the stepped portions 71 for axial positioning and is fixed to the inner housing 7. One second winding 61 is close to the first end plate 11 of the first end cover 1, and the other second winding 61 is close to the second end plate 21 of the second end cover 2. Each second winding 61 generates axial magnetic flux (the axial direction is the same as the extension direction of the shaft 3, i.e., the axial direction of the motor, such as...). Fig. 3 The vertical direction shown is the radial direction centered on the shaft 3 on a plane perpendicular to the extension direction of the shaft 3 (the magnetic flux direction is determined by the winding direction of the winding coil). The second rotor 62 is an outer rotor, located on the side of the second winding 61 away from the stator core 4. The second rotor 62 includes a disc-shaped second rotor disk 621 and a second magnet 622 located on the side of the second rotor disk 621 facing the second winding 61. The axial magnetic flux generated by the second winding 61 interacts with the second magnet 622 of the second rotor 62. Each second motor submodule is an axial flux motor module (also in the form of a disc motor module), thereby increasing motor power and minimizing the overall height of the motor. The aforementioned shaft 3 passes through the two second rotors 62 respectively, and each rotor is fixed to the shaft 3.

[0034] In this embodiment, the disc motor generates magnetic flux directly through the printed windings 612 on the PCB board 611, which interacts with the second magnets 622 of the corresponding second rotor 62 to generate rotation. Therefore, it can be made very thin without significantly changing the size of the original motor.

[0035] This composite three-rotor motor, consisting of one radial flux motor module and two axial flux motor modules, can be synchronously controlled and move synchronously, or independently controlled and move synchronously, through certain control logic, achieving more precise motion control. Externally, through the assembly of front and rear end covers, it remains an internal rotor motor, providing excellent protection for the internal components. In terms of motor performance, it is equivalent to three motors working together, increasing power density and achieving improved performance.

Claims

1. A motor for a range hood, comprising: a housing; a rotating shaft (3) extending from inside the housing to outside the housing; a first motor sub-module comprising a first rotor (52), a stator core (4) sleeved on the periphery of the first rotor (52), and a first winding (51) disposed inside the stator core (4), the rotating shaft (3) penetrating the first rotor (52) and being fixed therewith; characterized in that: the motor further comprises a second motor sub-module arranged at each end of the first motor sub-module along the axial direction of the motor, each second motor sub-module comprising a second winding (61) and a second rotor (62) cooperating with the second winding (61), the rotating shaft (3) penetrating the second motor sub-module and being fixed with the second rotor (62).

2. The motor for a range hood according to claim 1, characterized in that: the first rotor (52) comprises a first rotor disc (521) and a first magnetic steel (522), the first magnetic steel (522) being fixedly installed inside the first rotor disc (521).

3. The motor for a range hood according to claim 1, characterized in that: the second winding (61) comprises a PCB board (611) and an axial magnetic flux generating printed winding (612), the printed winding (612) being printed on the PCB board (611), the second rotor (62) being arranged with the second winding (61) along the axial direction of the motor.

4. The motor for a range hood according to claim 3, characterized in that: the printed winding (612) is located on the side of the second winding (61) away from the stator core (4) and is disposed on the side of the PCB board away from the second rotor (62), the second rotor (62) comprises a second rotor disc (621) and a second magnetic steel (622) disposed on the side of the second rotor disc (621) facing the second winding (61).

5. The motor for a range hood according to claim 1, characterized in that: the motor further comprises an inner housing (7) disposed in the housing, the stator core (4) and the second winding (61) being fixed in the inner housing (7) respectively.

6. The motor for a range hood according to any one of claims 1 to 5, characterized in that: the housing comprises a first end cover (1) and a second end cover (2), the first end cover (1) comprising a first end plate (11), a first peripheral wall (12) formed on the periphery of the first end plate (11), and a first skirt (13) formed on the periphery of the first peripheral wall (12), the first skirt (13) being located at the end of the first peripheral wall (12) away from the first end plate (11) and extending radially outward from the end of the first peripheral wall (12); the second end cover (2) comprising a second end plate (21), a second peripheral wall (22) formed on the periphery of the second end plate (21), and a second skirt (23) formed on the periphery of the second peripheral wall (22), the second skirt (23) being located at the end of the second peripheral wall (22) away from the second end plate (21) and extending radially outward from the end of the second peripheral wall (22), the first peripheral wall (12) and the second peripheral wall (22) extending towards each other and having the same radial dimension, the first skirt (13) and the second skirt (23) being in abutment, thereby forming a space between the first end plate (11), the first peripheral wall (12), the second end plate (21), and the second peripheral wall (22) to accommodate the first motor sub-module and the second motor sub-module.

7. The motor for a range hood according to claim 6, characterized in that: The first end plate (11) is formed with a through hole (111) in the middle for the one end of a rotating shaft (3) to pass through, the other end of the rotating shaft (3) abuts against the inner side of a second end plate (21), the rotating shaft (3) is provided with a first bearing (31) at the position where the rotating shaft (3) cooperates with the first end plate (11), the rotating shaft (3) is provided with a second bearing (32) at the position where the rotating shaft (3) cooperates with the second end plate (21), the first bearing (31) is located at the inner side of the first end plate (11), and the second bearing (32) is located at the inner side of the second end plate (21).

8. A range hood characterized by: The application has the motor as claimed in any one of claims 1-7.

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