CN112491199A - External rotor motor and cooking appliance - Google Patents
External rotor motor and cooking appliance Download PDFInfo
- Publication number
- CN112491199A CN112491199A CN202011319850.XA CN202011319850A CN112491199A CN 112491199 A CN112491199 A CN 112491199A CN 202011319850 A CN202011319850 A CN 202011319850A CN 112491199 A CN112491199 A CN 112491199A
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- CN
- China
- Prior art keywords
- rotor
- blades
- housing
- shell
- external
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0664—Accessories
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides an external rotor motor and a cooking electric appliance, the external rotor motor comprises a rotor, a stator, a rotating shaft, a support and a rotor shell, the rotor is arranged in the rotor shell, the stator is arranged in the rotor and fixed on the support, the rotating shaft is fixed at one end of the rotor and penetrates through a central through hole of the stator and a through hole of the support, the rotor shell rotates along with the rotor, a plurality of corresponding blades and ventilation holes are arranged on the peripheral wall or/and the end wall of a shell of the rotor shell, when the rotor shell rotates, the blades play a role of the blades to introduce external wind into the rotor shell through the ventilation holes to form air convection, and heat is actively radiated by heating elements in a fan, so that the heat radiation efficiency is improved.
Description
Technical Field
The invention relates to the field of household appliances, in particular to an outer rotor motor and a cooking appliance.
Background
The existing household electric oven has higher requirement on the operating environment temperature of the motor due to higher temperature in the inner container, and a common household electric oven can be set with a heating temperature of more than 200 ℃, as shown in fig. 1, a coaxial double-fan-blade motor is usually adopted for oven products, namely, a main fan blade 30 is arranged in the inner container 100 to execute the functions of heating convection and uniform temperature field in the inner container 100, and another auxiliary fan blade 80 is arranged outside the inner container 100 and fixed on the same rotating shaft 50 for synchronous operation. The auxiliary fan 80 is a reverse fan for cooling the rotor 10, the stator 60, and the coil of the motor. The scheme needs to add parts, and has a complex structure and poor reliability.
As shown in fig. 2, for the steaming and baking integrated machine, since a large amount of steam is in the inner container 100, a high sealing requirement is required, and the motor is fixed outside the inner container wall through the support 40 when being installed, the rotating shaft 50 needs to penetrate through the inner container wall to connect the main fan blade 30 and the motor, and the rotating shaft 50 and the inner container 100 cannot be fitted too tightly to avoid being locked, so that heat, oil vapor and the like in the inner container 100 can enter the outside of the inner container 100 through the gap, and therefore, a sealing structure 70 must be designed outside the shaft on the support 40, and the auxiliary fan blade 80 cannot be installed any more, thereby bringing a serious heat dissipation problem to the motor.
As shown in fig. 3, in order to solve the heat dissipation problem, a hollow design is often adopted for the rotor housing 20, and passive heat dissipation is performed through heat dissipation holes, which is low in heat dissipation efficiency.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an outer rotor motor and a cooking appliance so as to improve the heat dissipation efficiency of the motor.
The invention provides an outer rotor motor which comprises a rotor, a stator, a rotating shaft, a support and a rotor shell, wherein the rotor is arranged in the rotor shell, the stator is arranged in the rotor and fixed on the support, the rotating shaft is fixed at one end of the rotor and penetrates through a central through hole of the stator and a through hole of the support, the rotor shell rotates along with the rotor, a plurality of corresponding blades and ventilation holes are arranged on the peripheral wall or/and the end wall of a shell of the rotor shell, and when the rotor shell rotates, the blades play a role of blades to introduce external wind into the rotor shell through the ventilation holes.
Further, the peripheral wall or/and the end wall of the housing of the rotor casing is/are stamped and flanged to form the blades and the ventilation holes.
Furthermore, the blades are uniformly distributed in a circumference manner by taking the center of the shell as a circle center.
Further, the plurality of blades are radial around the center of the housing.
Further, the planes of the vanes are perpendicular to the end wall of the housing, and the planes of the plurality of vanes collectively intersect the centerline of the rotor.
Furthermore, the ventilation holes and the blades are arranged on the circumferential wall of the shell of the rotor shell, and the end wall of the shell is provided with heat dissipation holes.
Furthermore, the number of the heat dissipation holes is multiple, and the heat dissipation holes are circumferentially distributed by taking the center of the shell as a circle center.
Furthermore, a plurality of louvres are evenly distributed on the end wall of the shell in a circumferential manner, so that the end wall of the shell is of a hollow structure.
Further, the ventilation holes and the vanes are provided on the end wall of the rotor case.
The invention also provides an active heat dissipation motor for the steaming and baking oven, which comprises the external rotor motor, the external rotor motor further comprises a main fan blade, the main fan blade is arranged in the inner container of the cooking appliance, one end of a rotating shaft of the external rotor motor is fixedly connected with the main fan blade, the other end of the rotating shaft extends out of the inner container and penetrates through a stator center through hole of the external rotor motor and a through hole of a support of the external rotor motor, and the support is fixed on the wall of the inner container.
The external rotor motor and the cooking appliance have the following technical effects:
one, rotor case follows the rotor and rotates together, be provided with a plurality of blades and the ventilation hole that correspond on rotor case's the casing perisporium or/and the end wall, when rotor case is rotatory, the blade plays the effect of flabellum, introduce the rotor case with outside wind in through the ventilation hole, form the air convection, heat dissipation takes the initiative to the heating element of motor inside, improve the radiating efficiency, this kind of mode need not increase new part, only reform transform current rotor case and can become passive heat dissipation for the initiative heat dissipation, the effect is showing, and simple structure.
And secondly, the circumferential wall or/and the end wall of the shell of the rotor shell is/are stamped and flanged to form the blades and the vent holes, the manufacturing process is simple, the manufacturing efficiency is high, and the structure of the rotor shell is simple.
And thirdly, the blades and the ventilation holes are arranged on the circumferential wall of the shell of the rotor shell, so that the turning radius is increased, and the air convection effect is improved.
Fourthly, the heat dissipation holes are formed in the end wall of the rotor shell, so that the heating element inside the motor is communicated with the outside, when the motor rotates, the air enters the motor through the heat dissipation holes along with the suction effect generated by the rotation of the rotor, and then is drawn out from the air dissipation holes to form directional air flow, and further the active heat dissipation effect is improved.
Fifthly, the radiating holes are uniformly distributed to ensure that the areas of all the positions inside the motor and the outside are communicated are the same, and when the motor rotates to radiate, the air flow entering all the positions inside the motor is approximately the same, so that the cooling effect of all the positions inside the motor is approximately the same.
Sixthly, when the size of the motor is smaller, the blades and the ventilation holes can be formed in the end wall of the rotor shell, and when the rotor shell rotates, the blades play a role of the fan blades and can play a role in strengthening convection and forcibly dissipating heat.
Drawings
FIG. 1 is a schematic view of a prior art dual-vane motor;
FIG. 2 is a schematic diagram of a motor for a steaming and baking integrated machine in the prior art;
FIG. 3 is a schematic perspective view of the rotor casing of FIG. 2 with heat dissipating holes;
fig. 4 is a schematic front view of a motor according to a first embodiment of the present invention;
FIG. 5 is a perspective view of the motor of FIG. 4;
FIG. 6 is a perspective view of the rotor housing of FIG. 4;
FIG. 7 is a schematic front view of the rotor housing of FIG. 4;
FIG. 8 is a perspective view of a rotor housing according to a second embodiment of the present invention;
FIG. 9 is a schematic front view of the rotor housing of FIG. 8;
10. a rotor; 20. a rotor housing; 21. a vent hole; 22. a blade; 23. heat dissipation holes; 30. a main fan blade; 40. a support; 50. a rotating shaft; 60. a stator; 70. a sealing structure; 80. auxiliary fan blades; 100. an inner container.
Detailed Description
To clearly illustrate the idea of the present invention, the present invention is described below with reference to examples.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is described clearly and completely below with reference to the drawings in the examples of the present invention, and it is obvious that the described examples are only a part of examples of the present invention, and not all examples. All other embodiments obtained by a person skilled in the art based on examples of the present invention without inventive step shall fall within the scope of protection of the present invention.
In the description of the present embodiments, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do 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 thus should not be construed as limiting the present invention.
The invention provides an outer rotor motor and a cooking appliance, which aim to improve the heat dissipation efficiency of the motor.
Example one
As shown in fig. 4 and 5, the outer rotor includes a rotor 10, a stator 60, a rotating shaft 50, a support 40 and a rotor housing 20, the rotor 10 is disposed in the rotor housing 20, the stator 60 is disposed inside the rotor 10 and fixed on the support 40, the rotating shaft 50 is fixed at one end of the rotor 10 and passes through a central through hole of the stator 60 and a through hole of the support 40, the rotor housing 20 rotates along with the rotor 10, a plurality of corresponding blades 22 and ventilation holes 21 are disposed on a peripheral wall of a housing of the rotor housing 20, and when the rotor housing 20 rotates, the blades 22 function as fan blades to introduce external wind into the rotor housing 20 through the ventilation holes 21.
As shown in fig. 5 to 7, a plurality of ventilation holes 21 and blades are provided along the circumferential wall of the rotor case 20, the blades 22 are radially arranged around the center of the rotor case 20 and circumferentially arranged around the center of the rotor case 20, and the blades 22 function as blades when the rotor case 20 rotates. In this embodiment, the circumferential wall of the rotor housing 20 is stamped and flanged to form the blades 22 and the ventilation holes 21, the manufacturing process is simple, the manufacturing efficiency is high, and the structure of the rotor housing 20 is simple.
In the present embodiment, the cross-sectional shape of the rotor housing 20 is circular in order to form a stable rotating airflow. The number of the ventilation holes 21 and the number of the blades 22 are determined according to the size of the rotor housing 20, in this embodiment, the number of the ventilation holes 21 is nine, the number of the corresponding blades 22 is also nine, the blades 22 are circumferentially and uniformly distributed on the circumferential wall of the housing of the rotor housing 20, and the circle center of the circumference coincides with the center of the rotor housing 20 and also coincides with the center of the rotor 10. The blades 22 and the ventilation holes 21 are provided on the case peripheral wall of the rotor case 20 to increase the radius of gyration, thereby enhancing the effect of air convection.
As shown in fig. 6 and 7, nine blades 22 are disposed on the circumferential wall of the rotor housing 20, the surfaces of the blades 22 are perpendicular to the end wall of the rotor housing 20, and the surfaces of the nine blades 22 intersect with the center line of the rotor 10, and when the blades 22 are disposed in this way, the effective windward area of the blades 22 is the largest and the air convection is the strongest during the rotation of the rotor housing 20 around the center thereof. Alternatively, blades 22 may be modified to the curved shape of the fan blades to account for energy consumption.
As shown in fig. 7, the heat dissipation holes 23 are formed in the end wall of the rotor housing 20, so that the heating elements inside the motor are communicated with the outside, when the motor rotates, a suction effect is generated along with the rotation of the rotor 10, air enters the motor through the heat dissipation holes 23 and is then drawn out from the air vents 21, directional air flow is formed, and the active heat dissipation effect is further improved.
As shown in fig. 7, in the present embodiment, the number of the heat dissipation holes 23 is three, and the heat dissipation holes are circumferentially distributed around the center of the rotor housing 20 and evenly distributed on the end wall of the rotor housing 20, and the end wall of the rotor housing 20 is equally divided into three parts, so that the end wall of the rotor housing 20 is in a hollow structure. Hollow out construction is formed by evenly distributed's louvre 23 on the rotor housing 20 end wall, and the louvre 23 of equipartition guarantees that the inside each position of motor is the same with the area of external intercommunication, and when the rotatory radiating in-process of motor, the air mass flow that gets into inside each position of motor is roughly the same to the cooling effect that makes inside each position of motor is roughly the same, prevents the inside too big condition of difference in temperature that appears in the motor.
As shown in fig. 4, the embodiment further provides a steaming and baking integrated machine, which includes the above external rotor motor, the external rotor motor further includes a main fan blade 30 and a sealing structure 70, the main fan blade 30 is disposed in an inner container 100 of the cooking appliance, a free end of a rotating shaft 50 of the external rotor motor extends into the inner container 100 to be fixedly connected with the main fan blade 30, a support 40 is fixed on a wall of the inner container 100, and the sealing structure 70 is disposed at a position where the main shaft 50 extends out of the inner container 100.
The seal structure 70 is provided at a position where the main shaft 50 extends out of the inner container 100. The provision of the sealing structure 70 can prevent heat and oil vapor inside the inner container 100 from entering the outside of the inner container 100.
Example two
As shown in fig. 8 and 9, the main difference between the present embodiment and the first embodiment is that only the ventilation holes 21 and the blades 22 are provided on the rotor housing 20, and the ventilation holes 21 are provided on the end wall of the rotor housing 20, and the blades 22 are circumferentially distributed around the center of the rotor housing 20. When the peripheral wall of the rotor housing 20 is not convenient to open, the ventilation hole 21 is formed in the end wall of the rotor housing 20, in order to maximize the radius of rotation of the blades 22, the ventilation hole 21 and the blades 22 are formed in the edge of the end wall of the rotor housing 20, and when the rotor housing 20 rotates, the blades function as fan blades and can also have the effects of enhancing convection and forcibly dissipating heat.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as within the scope of the invention.
Claims (10)
1. An outer rotor motor comprises a rotor (10), a stator (60), a rotating shaft (50), a support (40) and a rotor shell (20), characterized in that the rotor (10) is arranged in a rotor housing (20), the stator (60) is arranged inside the rotor (10) and fixed on the support (40), the rotating shaft (50) is fixed at one end of the rotor (10) and penetrates through a central through hole of the stator (60) and a through hole of the support (40), the rotor shell (20) rotates along with the rotor (10), a plurality of corresponding blades (22) and vent holes (21) are arranged on the peripheral wall or/and the end wall of the shell of the rotor shell (20), when the rotor housing (20) rotates, the blades (22) function as fan blades, and external wind is introduced into the rotor housing (20) through the ventilation holes (21).
2. The external rotor electric machine according to claim 1, characterised in that the housing circumferential wall or/and the end wall of the rotor housing (20) is/are stamped with a flanging to form the blades (22) and the ventilation openings (21).
3. The external rotor electric machine according to claim 1, characterised in that a plurality of blades (22) are distributed uniformly circumferentially around the centre of the rotor housing (20).
4. The external rotor electric machine according to claim 1, characterized in that the blades (22) are radial centered on the center of the rotor housing (20).
5. The external rotor electric machine according to claim 1, characterized in that the planes of the blades (22) are perpendicular to the end wall of the rotor housing (20), and the planes of a plurality of the blades (22) intersect in common at the center line of the rotor.
6. The external rotor motor according to claim 1, wherein the ventilation holes (21) and the blades (22) are disposed on a circumferential wall of the rotor housing (20), and the end wall of the rotor housing (20) is provided with heat dissipation holes (23).
7. The external rotor electric machine according to claim 6, wherein the number of the heat dissipation holes (23) is multiple, and the heat dissipation holes (23) are circumferentially distributed around the center of the rotor housing (20).
8. The external rotor motor according to claim 7, wherein the heat dissipation holes (23) are circumferentially and uniformly distributed on the end wall of the rotor housing (20) so that the end wall of the rotor housing (20) is in a hollow structure.
9. The external rotor electric machine according to claim 1, characterised in that the ventilation holes (21) and the blades (22) are provided on the end wall of the rotor housing (20).
10. An external rotor electric machine as recited in any one of claims 1 to 9, further comprising main fan blades (30), wherein the main fan blades (30) are disposed in an inner container (100) of the cooking appliance, a free end of a rotating shaft (50) of the external rotor electric machine extends into the inner container (100) and is fixedly connected with the main fan blades (30), and the support (40) is fixed on a wall of the inner container (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319850.XA CN112491199A (en) | 2020-11-23 | 2020-11-23 | External rotor motor and cooking appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319850.XA CN112491199A (en) | 2020-11-23 | 2020-11-23 | External rotor motor and cooking appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112491199A true CN112491199A (en) | 2021-03-12 |
Family
ID=74933365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011319850.XA Pending CN112491199A (en) | 2020-11-23 | 2020-11-23 | External rotor motor and cooking appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112491199A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114287789A (en) * | 2021-12-14 | 2022-04-08 | 宁波方太厨具有限公司 | Steaming and baking integrated machine |
| CN116388432A (en) * | 2023-01-05 | 2023-07-04 | 宁波意卡德电器科技有限公司 | Special motor of air fryer |
-
2020
- 2020-11-23 CN CN202011319850.XA patent/CN112491199A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114287789A (en) * | 2021-12-14 | 2022-04-08 | 宁波方太厨具有限公司 | Steaming and baking integrated machine |
| CN116388432A (en) * | 2023-01-05 | 2023-07-04 | 宁波意卡德电器科技有限公司 | Special motor of air fryer |
| CN116388432B (en) * | 2023-01-05 | 2024-04-26 | 宁波意卡德电器科技有限公司 | Special motor of air fryer |
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