CN212875595U

CN212875595U - Motor, hot air assembly and cooking utensil

Info

Publication number: CN212875595U
Application number: CN202021419206.5U
Authority: CN
Inventors: 刘波; 李云龙; 孙炎军; 唐相伟
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-04-02
Anticipated expiration: 2030-07-17

Abstract

The present disclosure provides a motor, a hot air assembly and a cooking appliance. The motor comprises a stator, a rotor and radiating blades. The stator comprises a stator bracket and a stator winding, wherein the stator bracket comprises a fixing part and an installation part positioned on one side of the installation part; the stator winding is fixed on the fixing part, and the mounting part is used for mounting the stator bracket on an external support piece; the rotor is arranged corresponding to the stator winding; the rotor is rotatable relative to the stator; the heat dissipation blades are arranged on the rotor and rotate along with the rotor when the rotor rotates, so that heat dissipation is performed on the stator and the rotor. The scheme of the disclosure improves the self-heat-dissipation capacity of the motor.

Description

Motor, hot air assembly and cooking utensil

Technical Field

The utility model relates to a cooking utensil field, in particular to motor, hot-blast subassembly and cooking utensil.

Background

The hot air assembly of the cooking appliance generally includes a heat shield, a heating tube shield, a motor, a heating tube, a hot air fan, etc. The motor drives the hot-blast fan to rotate, high-speed air flow is generated, the air flow exchanges heat with the heating pipe, heat of the heating pipe is transferred into a heating cavity of the cooking appliance, and food materials in the cavity are heated.

In the related art, in order to radiate heat to the motor, the fan is usually disposed on the motor shaft of the motor, however, the thickness of the whole hot air component after assembly is thick, and the volume of the cooking appliance is relatively large.

SUMMERY OF THE UTILITY MODEL

One object of the present disclosure is to improve the self-heat dissipation performance of an electric machine.

In order to solve the technical problem, the following technical scheme is adopted in the disclosure:

according to one aspect of the present disclosure, there is provided an electric machine comprising:

the stator comprises a stator bracket and a stator winding, wherein the stator bracket comprises a fixing part and an installation part positioned on one side of the installation part; the stator winding is fixed on the fixing part, and the mounting part is used for mounting the stator bracket on an external support piece;

a rotor provided corresponding to the stator winding, the rotor being rotatable relative to the stator;

and the heat dissipation blades are arranged on the rotor, and when the rotor rotates, the heat dissipation blades rotate along with the rotor so as to dissipate heat of the stator and the rotor.

Optionally, the rotor includes a rotor housing, a rotor winding disposed in the housing; the rotor housing and the rotor winding rotate together relative to the stator;

the radiating blades are fixedly arranged on the rotor shell.

Optionally, the rotor housing is cylindrical, and the rotor housing includes a bottom wall and a cylindrical side wall; a motor shaft of the motor protrudes out of the bottom wall;

the radiating blades are fixedly arranged on the outer surface of the side wall.

Optionally, the heat dissipation blade is disposed on a side of the sidewall close to the fixing portion.

Optionally, the heat dissipation blade includes a first plate and a second plate connected to each other, and the first plate and the second plate are arranged at an included angle;

the included angle between the first plate body and the radial plane of the motor shaft of the motor is-15 degrees; the second plate body extends from the first plate body towards the direction departing from the fixing part.

Optionally, an included angle between the first plate body and the second plate body is 45-90 °.

Optionally, the heat dissipation blade and the rotor housing are integrally formed.

Optionally, the number of the mounting parts is multiple, and the mounting parts and the fixing part enclose to form an accommodating space;

the rotor and the stator winding are embedded in the accommodating space.

According to another aspect of the present disclosure, a hot air assembly is provided, including:

a heat shield;

the heating component is arranged on the inner side of the heat shield;

the motor is positioned on one side of the heat shield, which is far away from the heating component.

According to another aspect of the present disclosure, a cooking appliance is provided, which includes the motor, or the hot air assembly.

The embodiment of the disclosure provides a motor, which is characterized in that a rotor of the motor is provided with radiating blades, so that the radiating blades rotate along with the rotor when the rotor rotates, and thus ambient air is driven to carry out forced convection radiation so as to radiate heat of a stator and the rotor, and the self-radiating capacity of the motor is improved.

And when this motor was applied to in the hot-blast subassembly, the motor that has radiator vane not only can carry out self-radiating, can also dispel the heat to hot-blast subassembly's heat exchanger, was favorable to having improved whole hot-blast subassembly's heat-sinking capability. Moreover, the radiating blades and the motor rotor are integrated, so that an independent radiating fan is prevented from being arranged in the hot air assembly, the overall thickness of the hot air assembly is reduced, and the miniaturization development of the hot air assembly is facilitated.

In conclusion, the technical scheme of the disclosure improves the self-heat-dissipation capability of the motor.

Drawings

FIG. 1 is a schematic diagram of a structure of a motor according to one embodiment;

FIG. 2 is a side view of FIG. 1;

fig. 3 is a schematic structural diagram of a motor in the related art.

The reference numerals are explained below:

1. a stator; 11. a stator support; 111. a fixed part; 112. an installation part; 2. a rotor; 21. a rotor housing; 211. a bottom wall; 212. a side wall; 22. a motor shaft; 3. a heat dissipating fin; 31. a first plate body; 32. a second plate body; 4. a fan.

Detailed Description

While this disclosure may be susceptible to embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present description is to be considered as an exemplification of the principles of the disclosure and is not intended to limit the disclosure to that as illustrated herein.

Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the disclosure, and not to imply that every embodiment of the disclosure must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as upper, lower, left, right, front and rear) are used to explain the structure and movement of the various elements of the disclosure not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

Preferred embodiments of the present disclosure are described in further detail below with reference to the accompanying drawings of the present specification.

The present disclosure provides a motor that may be used in a hot air assembly of a cooking appliance. The cooking appliance can be a microwave oven, an oven, a steam box or an electric cooker, etc.

In the following embodiments, structural embodiments of the motor will be described in conjunction with embodiments in which the motor is applied within a hot air assembly.

In one embodiment, the hot air assembly includes a heat shield, a heat generating assembly, and a motor. Wherein, the heating component is arranged at the inner side of the heat shield; the motor is located the heat exchanger and deviates from one side of heating element. The heating component can comprise a heating pipe cover, a heating pipe and a hot air fan. The heating pipe cover is positioned on the inner side of the heat insulation cover; the heating tube is arranged on the inner side of the heating tube cover; the motor is located the outside of heat exchanger, and the motor shaft and the hot-blast fan fixed connection of motor. When the hot air component works, the motor drives the hot air fan to rotate to generate high-speed airflow, and the high-speed airflow exchanges heat with the heating tube, so that heat of the heating tube is transferred into the cavity to heat food materials in the cavity of the microwave oven.

The heat shield is provided with a bottom plate and a surrounding edge positioned around the bottom plate, and the bottom plate and the surrounding edge jointly enclose a cavity forming the heat shield. The inner side of the heat shield refers to the side of the heat shield where the cavity is located, and it should be noted that the bottom plate of the heat shield does not mean that the bottom plate is located at the bottom of the heat shield. The position of the bottom plate can be different according to the arrangement position of the whole hot air assembly.

The motor is located outside the heat shield, i.e. the motor is not in the cavity formed by the heat shield. The motor shaft of the motor needs to penetrate through the heat insulation cover and the heating pipe cover to be fixedly connected with the hot air fan. In the work, the motor needs to drive hot-blast fan work continuously, therefore motor self can produce more heat to the motor receives to separate the influence of heat that the heat exchanger radiated comes, also can lead to motor work in higher temperature environment. Therefore, the temperature rise of the motor is generally high in the hot air unit. Based on this, the present embodiment provides a motor with a heat dissipation effect to improve the self-heat dissipation capability of the motor and improve the heat dissipation effect of the whole hot air assembly.

Please refer to fig. 1 and fig. 2. FIG. 1 is a schematic diagram of a structure of a motor according to one embodiment; fig. 2 is a side view of fig. 1. In one embodiment, the motor includes a stator 1, a rotor 2, and heat dissipating blades 3. The stator 1 comprises a stator bracket 11 and a stator winding, wherein the stator bracket 11 comprises a fixing part 111 and a mounting part 112 positioned on one side of the mounting part 112; the stator winding is fixed on the fixing part 111, and the mounting part 112 is used for mounting the stator bracket 11 on an external support; the rotor 2 is arranged corresponding to the stator winding; the rotor 2 is rotatable relative to the stator 1; the heat radiating blades 3 are arranged on the rotor 2, and the heat radiating blades 3 rotate along with the rotor 2 when the rotor 2 rotates so as to radiate heat to the stator 1 and the rotor 2.

In a specific embodiment, the fixing portion 111 has a substantially circular plate shape and is used for fixing the stator winding. The mounting portion 112 may be provided in plural, for example, three, and is disposed around the fixing portion 111. The mounting portion 112 may have screw holes for fixing the stator bracket 11 to the heat shield of the hot air module by screw coupling. The mounting portion 112 may protrude from the fixing portion 111, so that the fixing portion 111 and the mounting portion 112 cooperate to form a receiving space.

The rotor 2 comprises a rotor winding and a rotor housing 21. The rotor winding can be assembled with the stator winding through a bearing, the rotor shell 21 is wrapped on the outer side of the rotor winding, when the motor works, the stator winding is kept still, and the rotor winding drives the rotor shell 21 to rotate relative to the stator winding.

In the present embodiment, in order to improve the self-heat dissipation effect of the motor, the rotor 2 is provided with the heat dissipation blades 3. When the rotor 2 rotates, the heat dissipation blades 3 rotate along with the rotor, so that surrounding air is driven to carry out forced convection heat dissipation, and the effect of heat dissipation of the stator 1, the rotor 2, the heat shield and other parts of the motor is achieved.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a motor in the related art. Generally, in the hot air unit, a separate heat dissipation fan 4 is provided to dissipate heat from the motor. In the present embodiment, the heat dissipation fan 4 is integrated with the rotor case 21 to form one unit. This component may be used as the rotor case 21 to protect the rotor windings, or as the heat radiation fan 4 to radiate heat to the motor. Therefore, an independent radiating fan 4 is not required to be arranged in the hot air assembly, the radiating effect of the hot air assembly is guaranteed, meanwhile, the thickness of the hot air assembly is reduced, the structural compactness of the radiating assembly is improved, and the size of the hot air assembly is reduced.

In addition, in the present embodiment, the thickness of the hot air component is further reduced by jointly embedding and mounting the stator winding, the rotor winding and the rotor housing 21 into the accommodating space. In the related art, the stator bracket 11 needs to be limited by the motor shaft 22, and the stator winding, the rotor winding and the rotor housing 21 are assembled. In the present embodiment, the stator winding is fixed to the fixing portion 111 of the stator frame 11, and the rotor winding may be assembled with the stator 1 through a bearing, so that the rotor 2 rotates and the stator 1 is fixed. At the same time, the rotor 2 drives the rotor housing 21, thereby driving the heat-dissipating blades to rotate. The rotor housing 21 may be connected to the rotor winding by welding or key connection, or may be connected to the motor shaft 22 (i.e., the shaft of the rotor 2) by welding or key connection. This avoids the need for assembly by means of the motor shaft 22, thereby further reducing the thickness of the hot air assembly.

Specifically, the heat dissipation blades 3 may be fixedly disposed on the rotor housing 21, or may be fixedly disposed on the rotor winding. When the rotor 2 is free of the rotor housing 21, the cooling blades 3 can be fastened directly to the rotor winding. In this embodiment, the heat dissipating fins 3 are fixedly provided on the rotor case 21.

The rotor housing 21 has a cavity therein for accommodating the rotor windings. In one embodiment, the rotor housing 21 has a hollow cylindrical shape, and the rotor housing 21 includes a circular bottom wall 211 and a cylindrical side wall 212; the motor shaft 22 protrudes out of the bottom wall 211; the heat dissipating fins 3 are fixedly disposed on the outer surface of the sidewall 212. Specifically, the motor shaft 22 correspondingly penetrates out from the center of the bottom wall 211 to improve the symmetry of the whole motor.

In order to improve the heat dissipation effect of the heat dissipation blades 3 on the motor, in an embodiment, the heat dissipation blades 3 are disposed on the side wall 212 near the fixing portion 111 of the stator frame 11. Therefore, the heat dissipation range of the heat dissipation blades 3 approximately covers the whole rotor shell 21, so that heat dissipated from the rotor shell 21 is taken away more, and the temperature rise of the motor is effectively reduced.

The cooling blades 3 can be designed as centrifugal blades or axial blades. The centrifugal fan blade can suck air from the axial direction of the fan blade and then throw fluid out from the circumferential direction by utilizing centrifugal force. The axial flow fan blades can flow air along the axial direction of the fan blades. Thus, each of the two blades has different heat dissipation advantages.

In an embodiment, the heat dissipating blade 3 includes a first plate 31 and a second plate 32 connected to each other, and the first plate 31 and the second plate 32 are disposed at an included angle; the included angle between the first plate body 31 and the radial plane of the motor shaft 22 is-15 to 15 degrees; the second plate 32 extends from the first plate 31 in a direction away from the stator 1.

Specifically, the first plate 31 may extend outward from the surface of the side wall 212, the second plate 32 is disposed on the surface or edge of the first plate 31, and the second plate 32 has a gap from the surface of the side wall 212. Illustratively, the heat dissipating fins 3 are generally L-shaped or T-shaped. The first plate 31 may be substantially parallel to a radial plane of the motor shaft 22, and the second plate 32 may be substantially perpendicular to the radial plane of the motor shaft 22. When the heat dissipating blades 3 rotate, the airflow flows along the first blade surface to the second blade surface, and the second blade guides the airflow so that the wind blown from the heat dissipating blades 3 is blown toward the motor and the area between the motor and the heat shield substantially in the direction of the motor shaft 22.

Further, in some embodiments, the included angle between the first plate 31 and the second plate 32 is 45 ° to 90 °. When the included angle between the first plate 31 and the second plate 32 is too small, the air intake and the air output of the heat dissipation blades 3 are reduced. When the first plate 31 and the second plate 32 are too large, the air outlet distance is reduced, and the heat dissipation effect is affected.

In another embodiment, the heat dissipating blades 3 are sheet-shaped, and the included angle between the surface of the heat dissipating blades 3 and the radial plane of the motor shaft 22 is 45-90 °.

In the above embodiment, only one or a plurality of the heat dissipating fins 3 may be provided. Optionally, the number of the fan heating blades is 3-8, and the number of the fan heating blades can be designed by combining the size of the rotor shell 21.

In the above embodiment, the heat dissipating blades 3 may be integrally provided with the rotor case 21, thereby increasing the stability of the connection of the heat dissipating blades 3 with the rotor case 21 and reducing the amount of welding. Of course, the heat dissipating blades 3 may be a separate component from the rotor housing 21 and fixedly connected by welding, screwing, or the like.

The embodiment of the disclosure provides a motor, through set up cooling blade 3 on rotor 2 at the motor to cooling blade 3 rotates when rotor 2 rotates, thereby drives the forced convection heat dissipation of air around, with the heat dissipation to stator 1 and rotor 2, thereby has improved the self-heat-sinking capability of motor.

And, when this motor was applied to in the hot-blast subassembly, the motor that has cooling fin 3 not only can dispel the heat by oneself, can also dispel the heat to the heat exchanger that separates of hot-blast subassembly, was favorable to having improved whole hot-blast subassembly's heat-sinking capability. Moreover, through integrating cooling blade 3 and electric motor rotor 2, avoid setting up solitary radiator fan 4 in hot-blast subassembly, reduced hot-blast subassembly's whole thickness from this, be favorable to hot-blast subassembly towards miniaturized development.

The present disclosure further provides a hot air assembly having the motor, and the hot air assembly has all the above beneficial effects by providing the motor structure of the present disclosure, which is not described herein again.

The present disclosure still further provides a cooking appliance having the above hot air assembly. The cooking appliance can be a separate microwave oven, an oven, a steam box or an electric cooker, and can also be a micro-steaming and baking integrated machine. By being provided with the above-mentioned hot-blast subassembly of this disclosure, this cooking utensil has foretell all beneficial effect, and the no longer repeated description here.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An electric machine, comprising:

the stator comprises a stator bracket and a stator winding, wherein the stator bracket comprises a fixing part and an installation part positioned on one side of the fixing part; the stator winding is fixed on the fixing part, and the mounting part is used for mounting the stator bracket on an external support piece;

2. The electric machine of claim 1, wherein the rotor comprises a rotor housing, a rotor winding disposed within the housing; the rotor housing and the rotor winding rotate together relative to the stator;

the radiating blades are fixedly arranged on the rotor shell.

3. The electric machine of claim 2, wherein the rotor housing is cylindrical, the rotor housing including a bottom wall and a cylindrical side wall; a motor shaft of the motor protrudes out of the bottom wall;

4. The electric machine according to claim 3, wherein the heat dissipating fins are provided on a side of the side wall adjacent to the fixing portion.

5. The motor of claim 1, wherein the heat dissipation blade comprises a first plate body and a second plate body which are connected, and the first plate body and the second plate body are arranged at an included angle;

6. The motor of claim 5, wherein the included angle between the first plate and the second plate is 45 ° to 90 °.

7. The electric machine of claim 2, wherein the cooling fins are integrally formed with the rotor housing.

8. The motor according to any one of claims 1 to 7, wherein the mounting portion is provided in plurality, and a plurality of mounting portions and the fixing portion enclose a receiving space;

the rotor and the stator winding are embedded in the accommodating space.

9. A hot air assembly, comprising:

a heat shield;

the heating component is arranged on the inner side of the heat shield;

an electric machine as claimed in any one of claims 1 to 8, located on a side of the heat shield facing away from the heat generating component.

10. A cooking appliance comprising a motor according to any one of claims 1 to 8, or a hot air assembly according to claim 9.