Compact-structure low-cost motor structure for range hood
By adopting the brushless motor structure of the outer rotor, the problem of high price of the range hood motor is solved, cost reduction, torque increase, volume reduction and efficiency improvement are achieved, ensuring the efficient operation and service life of the range hood.
Patent Information
- Application Number
- CN202421851607.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-01
AI Technical Summary
Existing range hood motors are generally expensive, and it is necessary to design a motor structure with a compact and low cost.
The new outer rotor brushless motor structure is adopted, including a stator bracket, front bracket, stator assembly, rotor assembly, lead wire, PCB circuit board, bearing, screw, waterproof sheath and sealing ring. The rotor assembly is composed of magnetic ring, injection molded rotor and shaft core. The stator assembly is composed of enameled wire and plasticized stator. The two-end bearing design achieves smooth operation of the rotor assembly and reduces energy loss.
Effectively reduces motor cost by more than 20%, the motor has greater torque, smaller volume, more compact structure, improves working efficiency and extends service life.
Smart Images
Figure CN223093562U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hood motors, and particularly relates to a motor structure for a range hood with a compact structure and low cost. Background Technique
[0002] A range hood is a household appliance mainly used in the kitchen, which can effectively extract oil fumes, peculiar smells and moisture in the kitchen, making the kitchen environment cleaner and more comfortable. The core power in the range hood is the motor of the range hood, and its performance directly affects the working efficiency of the range hood.
[0003] At present, the range hoods on the market generally adopt the structure of an inner-rotor brushless motor, and the prices of range hood motors are generally very high. Therefore, it is necessary to design a motor structure for a range hood with a compact structure and low cost to solve the above technical problems. Content of the Utility Model
[0004] The purpose of the utility model is to solve the technical problems that the range hoods on the market generally adopt the structure of an inner-rotor brushless motor and the prices of range hood motors are generally very high, and to provide a motor structure for a range hood with a compact structure and low cost to solve the above technical problems. By adopting a brand-new outer-rotor brushless motor structure, the product cost can be effectively reduced by more than 20%, the motor torque is larger, the motor volume is smaller, and the structure is more compact.
[0005] A motor structure for a range hood with a compact structure and low cost, characterized in that: it includes a motor, and the motor is composed of a stator bracket, a front bracket, a stator assembly, a rotor assembly, lead wires, a PCB circuit board, a front bearing, a rear bearing, screws, a waterproof sheath and a sealing ring. The stator assembly is assembled inside the rotor assembly. The rotor assembly is composed of a magnetic ring, an injection-molded rotor and a shaft core. The injection-molded rotor is assembled at the tail end of the shaft core, and the magnetic ring is assembled outside the injection-molded rotor. The stator assembly is composed of enameled wires and a plastic-coated stator. The enameled wires are assembled in the slots of the plastic-coated stator. The tail end of the shaft core is rotatably connected to the stator bracket through the rear bearing. The front end of the shaft core is rotatably connected to the front bracket through the front bearing, and the front end of the shaft core sequentially passes through the sealing ring and the front bracket, and the front end of the shaft core extends out of the front bracket. A shaft key pin is provided on the front end of the shaft core, and the front end of the shaft core is a threaded structure, and the length of the threaded structure is 9 mm - 9.1 mm. The sealing ring is located inside the front bracket. The stator bracket and the front bracket are fixedly assembled together by four screws or ultrasonic welding. The PCB circuit board is connected to the stator assembly by welding. The lead wires are electrically connected to the PCB circuit board. The lead wires are assembled on the side of the stator bracket, and a waterproof sheath is provided at the position where the lead wires contact the stator bracket.
[0006] Furthermore, the enameled wires are connected to the PCB circuit board, and the enameled wires are made of pure copper enameled wires.
[0007] Furthermore, the plastic-coated stator is provided with 12 slots or 18 slots, with an outer diameter of 65 - 80 mm. The plastic-coated stator is stacked by a number of silicon steel laminations with a thickness of 0.2 mm - 0.5 mm, and the stacking height is 10 - 30 mm.
[0008] Furthermore, the middle of the stator bracket is an aluminum alloy insert plastic structure, and the rear bearing is installed in the aluminum alloy insert plastic structure.
[0009] Furthermore, the front bracket is provided with a groove, the sealing ring is installed in the groove, and the IP rating of the motor reaches IP64.
[0010] Furthermore, the sealing ring is a rubber sealing ring.
[0011] Furthermore, the enameled wire and the plastic-coated stator adopt an insulated plastic-coated structure. The plastic-coated end of the plastic-coated stator adopts a pin structure for winding the enameled wire. The plastic-coated end is connected to the PCB circuit board by welding, and the stator assembly is connected to the driver by lead wires.
[0012] Furthermore, the injection-molded rotor and the shaft core are injection-molded into an integral structure.
[0013] Furthermore, the material of the magnetic ring is ferrite, magnetic strip or neodymium iron boron material. The magnetic ring has 5 - 20 pairs of poles, the height of the magnetic ring is 10 mm - 40 mm, and the outer diameter is 70 mm - 90 mm.
[0014] Compared with the prior art, the advantages of the present utility model include: designing the range hood motor into a brand-new outer rotor structure, that is, changing the design of the rotor of the range hood motor to an external rotation and internal stator method. One end of the rotor assembly is rotatably installed with the stator bracket through a bearing, and the other end is rotatably installed with the front bracket through a bearing, realizing the smooth operation of the rotor assembly. With the design of the two end bearings, when the motor drives the shaft core to move, the energy loss is almost zero, greatly improving the overall performance and working efficiency of the motor. The range hood can effectively extract the oil fume, peculiar smell and moisture in the kitchen, making the kitchen environment cleaner and more comfortable.
[0015] During the operation of the range hood motor provided by the present utility model, the motor torque T is directly proportional to the rotor diameter D. For the outer rotor motor designed by the present utility model, under the condition of ensuring the normal operation of the electric toothbrush motor, since the motor power P is directly proportional to the volume, the total length of the motor is shortened to 135.7 mm - 136.3 mm. Since Pin = Pout + P (iron loss) + P (eddy current) + P (copper loss) + P (mechanical), after the motor length is reduced, P (iron loss) + P (eddy current) + P (copper loss) will all decrease, the efficiency of the motor is greatly improved, the cost of the motor is greatly reduced, the cost is reduced by 20%, the motor torque is larger, the motor volume is smaller, and the structure is more compact. Brief Description of the Drawings
[0016] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the accompanying drawings required for the description of the embodiments will be briefly introduced below.
[0017] Figure 1 is an exploded view of the structure of a motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model;
[0018] Figure 2 is a three-dimensional view of the structure of a motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model;
[0019] Figure 3 is a three-dimensional view of the stator assembly in the motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model;
[0020] Figure 4 is a three-dimensional view of the front bracket in the motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model;
[0021] Figure 5 is a three-dimensional view of the stator bracket in the motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model;
[0022] In the drawings: 1, motor; 2, stator bracket; 3, front bracket; 4, stator assembly; 5, rotor assembly; 6, lead wire; 7, PCB circuit board; 8, front bearing; 9, screw; 10, waterproof sheath; 11, sealing ring; 12, rear bearing; 501, magnetic ring; 502, injection-molded rotor; 503, shaft core; 401, enameled wire; 402, plastic-coated stator; 5031, shaft key pin; 5032, threaded structure. Detailed Embodiments
[0023] In view of the deficiencies in the prior art, through long-term research and a large number of practices in this case, the technical solutions of the present utility model have been proposed. The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 is an exploded view of the structure of a motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model; Figure 2 is a three-dimensional view of the structure of a motor structure for a compact and low-cost range hood provided in an embodiment of the present utility model; Figure 3It is a three-dimensional structure diagram of the stator assembly in the motor structure for a compact and low-cost range hood provided in the embodiment of the present utility model; Figure 4 It is a three-dimensional structure diagram of the front bracket in the motor structure for a compact and low-cost range hood provided in the embodiment of the present utility model; Figure 5 It is a three-dimensional structure diagram of the stator bracket in the motor structure for a compact and low-cost range hood provided in the embodiment of the present utility model, as Figures 1 to 5As shown in the figure, a motor structure for a compact and low-cost range hood, characterized by comprising a motor 1, the motor 1 is composed of a stator bracket 2, a front bracket 3, a stator assembly 4, a rotor assembly 5, lead wires 6, a PCB circuit board 7, a front bearing 8, a rear bearing 12, screws 9, a waterproof sheath 10 and a sealing ring 11. There are two bearings 8. The stator assembly 4 is assembled inside the rotor assembly 5. When the motor works, the rotor assembly 5 rotates at a high speed outside, and the stator assembly 4 does not rotate. The rotor assembly 5 is composed of a magnetic ring 501, an injection-molded rotor 502 and a shaft core 503. The injection-molded rotor 502 is assembled at the tail end of the shaft core 503, and the magnetic ring 501 is assembled outside the injection-molded rotor 502. The stator assembly 4 is composed of enameled wire 401 and a plastic-coated stator 402. The enameled wire 401 is assembled in the slots of the plastic-coated stator 402. The tail end of the shaft core 503 is rotatably connected to the stator bracket 2 through the rear bearing 12. The front end of the shaft core 503 is rotatably connected to the front bracket 3 through the front bearing 8, and the front end of the shaft core 503 sequentially passes through the sealing ring 11 and the front bracket 3, and the front end of the shaft core 503 extends out of the front bracket 3. This design enables one end of the rotor assembly 5 to be rotatably installed on the front bracket 3 through the bearing 8, and the other end to be rotatably installed on the stator bracket 2 through the bearing 8, realizing the smooth operation of the rotor assembly 5. With the design of bearings at both ends, when the motor drives the shaft core 503 to move, the energy loss is almost zero, greatly improving the working efficiency of the motor, thereby greatly improving the efficiency of oil fume adsorption and discharge, effectively exhausting the oil fume, odor and moisture in the kitchen, and making the kitchen environment cleaner and more comfortable. A shaft key pin 5031 is provided at the front end of the shaft core 503, and a threaded structure 5032 is provided at the front end of the shaft core 503. The length of the threaded structure 5032 is 9 mm - 9.1 mm. The threaded structure is screwed together with the impeller on the range hood. When the motor rotates, it drives the shaft core to rotate, and the shaft core drives the impeller to rotate, thus completing the adsorption and discharge of oil fume by the range hood. The sealing ring 11 is located inside the front bracket 3. The front bracket 3 is provided with a groove for installing the sealing ring. A rubber sealing ring is provided at the front end of the front bracket 3 for installing the front bearing to seal the output end of the shaft core 503, so that the IP rating of the motor reaches IP64. The sealing ring 11 seals the motor to prevent external oil and water from entering the motor, extending the service life of the range hood motor. The front bracket 3 and the stator bracket 2 are concentrically aligned through the mating surface. If the stator bracket 2 and the front bracket 3 are assembled together by locking with four screws 9, the screw torque ≥ 8 Kg.f. For screw locking, screw glue is used. The front bracket 3 and the stator bracket 2 are firmly locked, so that the motor will not loosen during long-term operation, ensuring the overall sealing performance of the motor and extending the service life of the motor. The stator bracket 2 and the front bracket 3 can also be assembled together by ultrasonic welding. The front bracket 3 and the stator bracket 2 are firmly locked, so that the motor will not loosen during long-term operation, ensuring the overall sealing performance of the motor and extending the service life of the motor. The PCB circuit board 7 is connected to the stator assembly 4 by welding. The lead wire 6 is electrically connected to the PCB circuit board 7. The lead wire 6 is assembled on the side of the stator bracket 2, and a waterproof sheath 10 is provided at the position where the lead wire 6 contacts the stator bracket 2. The waterproof sheath 10 plays a role in waterproof sealing, preventing external oil or water from entering and extending the service life of the motor. The total length of the motor 1 is 135.7 mm - 136.3 mm. After the motor 1 is assembled, the distance from the front end face of the shaft core 503 to the rear end face of the front bracket 3 is 93.5 mm - 94.5 mm. Since the motor power P is proportional to the volume, and because Pin = Pout + P (iron loss) + P (eddy current) + P (copper loss) + P (mechanical), after the motor length is reduced, P (iron loss) + P (eddy current) + P (copper loss) will all decrease, the efficiency of the motor is greatly improved, the cost of the motor is greatly reduced, the cost is reduced by 20%, the motor torque is greater, the motor volume is smaller, and the structure is more compact.
[0025] Preferably, the enameled wire 401 is connected to the PCB circuit board 7. The enameled wire 401 is an enameled wire made of pure copper. The plastic-coated stator 402 has 12 slots or 18 slots. The plastic-coated stator 402 is stacked by a number of silicon steel sheets with a thickness of 0.2 mm - 0.5 mm, and the stacking height is 10 mm - 30 mm. The materials selected are silicon steel cores and pure copper with excellent performance, ensuring the working efficiency and service performance of the range hood motor.
[0026] Preferably, the middle of the stator bracket is an aluminum alloy insert plastic structure, and the rear bearing is assembled in the aluminum alloy insert plastic structure to support the rotor assembly and provide heat dissipation for the motor stator at the same time.
[0027] Preferably, the enameled wire and the plastic-coated stator adopt an insulated plastic-coated structure. The plastic-coated end of the plastic-coated stator adopts a pin structure for winding the enameled wire; the plastic-coated end is connected to the PCB circuit board by welding, and the stator assembly is connected to the driver through the lead wire. In actual production and processing, the three-phase wires of the stator assembly are connected to the driver through the lead wire; this structure is not limited to the hall-less structure and the hall structure, and is not limited to the built-in and external drivers.
[0028] Preferably, the threaded structure 5032 is an M6 threaded structure, and the shaft key pin is used to stabilize the combination of the shaft core and the motor, preventing the motor from loosening during operation.
[0029] Preferably, the rotor assembly is integrally formed by injection molding of the shaft core and the housing, which is simple to assemble and further reduces the production cost. The material of the magnetic ring is ferrite, magnetic strip or neodymium iron boron material. The magnetic ring has 5-20 pairs of poles, the height of the magnetic ring is 10mm-40mm, and the outer diameter is 70mm-90mm.
[0030] A motor structure for a range hood with a compact structure and low cost provided by the present utility model. It should be understood that the above embodiments are only used to illustrate the technical concept and characteristics of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. It cannot be used to limit the protection scope of the present utility model. Any simple modification and replacement made using the content of the present utility model are included in the protection scope of the present utility model.
Claims
1. A motor structure for a compact and low-cost range hood, characterized in that: It includes a motor, which is composed of a stator bracket, a front bracket, a stator assembly, a rotor assembly, lead wires, a PCB circuit board, a front bearing, a rear bearing, screws, a waterproof sheath and a sealing ring. The stator assembly is assembled inside the rotor assembly. The rotor assembly is composed of a magnetic ring, an injection-molded rotor and a shaft core. The injection-molded rotor is assembled at the tail end of the shaft core, and the magnetic ring is assembled outside the injection-molded rotor. The stator assembly is composed of enameled wire and a plastic-coated stator. The enameled wire is assembled in the slots of the plastic-coated stator. The tail end of the shaft core is rotatably connected to the stator bracket through the rear bearing. The front end of the shaft core is rotatably connected to the front bracket through the front bearing, and the front end of the shaft core sequentially passes through the sealing ring and the front bracket, and the front end of the shaft core extends out of the front bracket. There is a shaft key pin on the front end of the shaft core, and the front end of the shaft core is a threaded structure, and the length of its threaded structure is 9 mm - 9.1 mm. The sealing ring is located inside the front bracket. The stator bracket and the front bracket are fixedly assembled together by four screws or ultrasonic welding. The PCB circuit board is connected to the stator assembly by welding. The lead wires are electrically connected to the PCB circuit board. The lead wires are assembled on the side of the stator bracket, and a waterproof sheath is provided at the position where the lead wires contact the stator bracket.
2. The motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The enameled wire is connected to the PCB circuit board, and the enameled wire is an enameled wire made of pure copper.
3. The motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The plastic-coated stator has 12 slots or 18 slots, with an outer diameter of 65 - 80 mm. The plastic-coated stator is stacked by a number of silicon steel chips with a thickness of 0.2 mm - 0.5 mm, and the stacking height is 10 - 30 mm.
4. A motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The middle of the stator bracket is an aluminum alloy insert plastic structure, and the rear bearing is installed in the aluminum alloy insert plastic structure.
5. The motor structure for a compact and low-cost range hood according to claim 1, characterized in that: There is a groove on the front bracket, and the sealing ring is installed in the groove. The IP rating of the motor reaches IP64.
6. The motor structure for a compact and low-cost range hood according to claim 1, wherein: The sealing ring is a rubber sealing ring.
7. A motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The enameled wire and the plastic-coated stator adopt an insulated plastic-coated structure. The plastic-coated end of the plastic-coated stator adopts a pin structure for winding the enameled wire. The plastic-coated end is connected to the PCB circuit board by welding. The stator assembly is connected to the driver through the lead wires.
8. A motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The injection-molded rotor and the shaft core are an injection-molded integral forming structure.
9. A motor structure for a compact and low-cost range hood according to claim 1, characterized in that: The material of the magnetic ring is ferrite, magnetic strip or neodymium iron boron material. The magnetic ring has 5 - 20 pole pairs. The height of the magnetic ring is 10 mm - 40 mm, and the outer diameter is 70 mm - 90 mm.