External rotor motor suitable for range hood and range hood

Abstract

The utility model provides an external rotor motor suitable for a smoke exhaust ventilator, which relates to the field of driving equipment, and comprises a stretching shell, an external rotor is fixed in the stretching shell, end covers are arranged at the end parts of the two sides of the stretching shell, and the stretching shell is sealed by the two end covers in the axial direction of the stretching shell; the center shaft penetrates through the stretching shell and the end covers on the two sides, an inner stator is arranged on the center shaft, and the outer rotor rotates around the center shaft; the stretching shell and the end cover are made of metal materials with high thermal conductivity, the stretching shell and the end cover are riveted, and the metal with high thermal conductivity is used for replacing a stretching shell of an existing outer rotor motor, so that heat in the outer rotor motor can be timely led out through the stretching shell and the end cover; and the stretching shell and the end cover which are made of metal materials can be repeatedly riveted and connected, so that the stretching shell and the end cover can be dismantled, overhauled and reassembled and formed when the interior of the outer rotor motor breaks down.

Description

Technical Field

[0001] This utility model relates to the field of drive equipment, and in particular to an external rotor motor suitable for range hoods and a range hood. Background Technology

[0002] Currently, the motors in range hoods typically use a plastic-encapsulated casing. This material has the following drawbacks: First, it has poor heat dissipation. During prolonged operation, heat is not easily dissipated, leading to overheating and reduced motor efficiency. Second, the plastic casing cannot be restored after damage, resulting in waste. If a potential problem is discovered after motor assembly, requiring disassembly and rework, the damaged casing must be replaced promptly.

[0003] In view of the above-mentioned defects of the motor, this application provides a motor that can reduce the operating temperature during operation and facilitates rework and repair of the motor. Utility Model Content

[0004] This utility model provides an external rotor motor and a range hood suitable for use in range hoods. Its purpose is to replace existing motors made of plastic sealing materials and to overcome the problems of motors that cannot be reworked and have low heat dissipation efficiency.

[0005] To achieve the above objectives, embodiments of this utility model provide an external rotor motor, comprising:

[0006] A stretching shell, wherein an outer rotor is fixed inside the stretching shell, and end caps are provided at both ends of the stretching shell, the two end caps closing the stretching shell from the axial direction;

[0007] A central shaft passes through the tension housing and the end caps on both sides. An inner stator is provided on the central shaft, and the outer rotor rotates around the central shaft.

[0008] The stretching shell and end cap are made of a metal material with high thermal conductivity, and the stretching shell and the end cap are riveted together.

[0009] Preferably, a fan wheel is tightly fitted onto the outside of the stretching shell, and the fan wheel rotates synchronously with the stretching shell.

[0010] Preferably, the impeller includes an inner disk and an outer disk arranged coaxially. The inner disk is used to be tightly fitted to the outside of the stretching shell. The outer disk is fixedly connected to the inner disk. Several fan blades are respectively arranged on both sides of the outer disk along the length of the central axis. The impeller generates negative pressure when it rotates.

[0011] Preferably, the outer disk is further provided with auxiliary rings on both sides along the length of the central axis, and the auxiliary rings are fixed to the middle of the fan blade to fix the fan blade.

[0012] Preferably, the thermal conductivity of the stretch shell and end cap is not less than 50 W / m·K.

[0013] Preferably, the material of the stretching shell is cast iron, and the material of the end cap is aluminum alloy.

[0014] Preferably, each of the two end caps is provided with a central hole for the central shaft to pass through, and a bearing for reducing the friction between the central shaft and the end cap is provided between the central shaft and the central hole.

[0015] Preferably, the central shaft is provided with a shaft hole along the axial direction, and the shaft hole is used for the cable of the inner stator to pass through.

[0016] This application also provides a range hood, including the aforementioned external rotor motor.

[0017] The above-mentioned solution of this utility model has the following beneficial effects:

[0018] By replacing the existing stretched housing of the external rotor motor with a metal with high thermal conductivity, not only can the heat inside the external rotor motor be discharged in a timely manner through the stretched housing and end caps, but the metal stretched housing and end caps can also be repeatedly riveted together. When a fault occurs inside the external rotor motor, it can be disassembled, repaired, and reassembled.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of an external rotor motor;

[0022] Figure 3 This is a schematic diagram of a wind turbine.

[0023] [Explanation of Labels in the Attached Image]

[0024] 11-Stretch shell, 12-End cap, 13-Central shaft,

[0025] 20-Wind wheel, 21-Inner disc, 22-Outer disc, 23-Fan blade, 24-Auxiliary ring. Detailed Implementation

[0026] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1-3 As shown, an embodiment of this utility model provides an external rotor motor suitable for a range hood, including a stretching housing 11. An external rotor is fixed inside the stretching housing 11. End caps 12 are provided at both ends of the stretching housing 11. It is understood that the stretching housing 11 has a columnar structure, and the two end caps 12 close the two ends of the stretching housing 11 axially. A central shaft 13 is also provided axially through the stretching housing, and an inner stator is provided on the central shaft 13. The external rotor interacts with the inner stator, allowing the external rotor to rotate around the center, thus forming a working mode where the central shaft 13 does not rotate, but the stretching housing rotates. The two end caps 12 extend from both ends of the aforementioned central shaft 13, facilitating the installation of the central shaft 13 in the working position. In this application, the stretching housing 11 and the end caps 12 are made of a metal material with high thermal conductivity, and the stretching housing 11 and the end caps 12 are connected by riveting.

[0028] The outer rotor motor stretch housing 11 and end cover 12 are both made of metal, which can quickly dissipate the heat of the outer rotor motor, thereby further reducing the size of the outer rotor motor. Moreover, the stretch housing 11 and end cover 12 are connected by riveting, which allows the outer rotor to be disassembled and the stretch housing 11 and end cover 12 to be reused.

[0029] Preferably, the two ends of the stretching shell 11 have inwardly bent edges, and the edges and the end cap 12 are respectively provided with riveting holes. Rivets are inserted through the two riveting holes to realize the riveting of the end cap 12 and the stretching shell 11.

[0030] Preferably, a shaft hole for the central shaft 13 to pass through is provided at the center of the end cover 12, and a bearing is provided in the shaft hole, with the central shaft 13 and the inner ring of the bearing having an interference fit. The bearing can reduce the friction between the central shaft 13 and the end cover 12.

[0031] Preferably, the central shaft 13 has an axial hole and a radial inlet hole connected to the axial hole, through which the inner stator cable passes and exits the outer rotor motor.

[0032] Furthermore, an impeller 20 is axially mounted on the outer side of the stretching shell. The impeller 20 is tightly fitted to the stretching shell, allowing it to rotate around the central axis 13 under the drive of the outer rotor. The impeller 20 is used to generate negative pressure.

[0033] Specifically, the impeller 20 includes an inner disk 21 and an outer disk 22 coaxially arranged. The inner disk 21 is tightly fitted onto the outer circumferential surface of the tension housing 11, and the outer disk 22 is fixedly connected to the inner disk 21. Fan blades 23 are respectively arranged on both sides of the outer disk 22, and the fan blades 23 are used to generate negative pressure during rotation. In the impeller 20, the two sides of the outer disk 22 refer to the two sides along the length of the central axis 13. Several fan blades 23 are symmetrically arranged on both sides, and the fan blades 23 are arranged in a ring around the central axis 13.

[0034] Preferably, in order to fix the fan blades 23, auxiliary rings 24 are also provided on both sides of the fan blades 23, and the auxiliary rings 24 on the same side are fixed to the fan blades 23 on the same side respectively.

[0035] In this application, the thermal conductivity of the stretch shell 11 and the end cap 12 is not less than 50 W / m·K, meaning that a metal material with a thermal conductivity of not less than 50 W / m·K is considered a high thermal conductivity metal material. In this embodiment, the material of the stretch shell 11 is cast iron, and the material of the end cap 12 is aluminum alloy.

[0036] This application also provides a range hood that uses the aforementioned external rotor motor.

[0037] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An external rotor motor suitable for use in a range hood, characterized in that, Including: The stretch shell (11) is fixed with the outer rotor, and the end cover (12) is arranged at both side ends of the stretch shell (11), and the two end covers (12) are closed from the axial direction of the stretch shell (11) to the stretch shell (11). The center shaft (13) is arranged in the stretch shell (11) and the end cover (12) on both sides, and the inner stator is arranged on the center shaft (13), and the outer rotor rotates around the center shaft (13). The stretch shell (11) and the end cover (12) are made of metal material with high thermal conductivity, and the stretch shell (11) and the end cover (12) are riveted.

2. The external rotor motor suitable for use in a range hood according to claim 1, characterized in that: The stretch shell is tightly fitted with a wind wheel (20), and the wind wheel (20) rotates synchronously with the stretch shell.

3. The external rotor motor suitable for use in a range hood according to claim 2, characterized in that: The wind wheel (20) includes coaxially arranged inner disc (21) and outer disc (22), the inner disc (21) is used for tightly fitting and installing outside the stretch shell (11), the outer disc (22) is fixedly connected with the inner disc (21), and a plurality of fan blades (23) are arranged on both sides of the outer disc (22) along the length direction of the center shaft (13), and the wind wheel (20) generates negative pressure when rotating.

4. The external rotor motor suitable for use in a range hood according to claim 3, characterized in that: The outer disc (22) is further provided with an auxiliary ring (24) on both sides along the length direction of the center shaft (13), and the auxiliary ring (24) is fixed in the middle of the fan blade (23) to fix the fan blade (23).

5. The external rotor motor suitable for use in a range hood according to claim 1, characterized in that: The thermal conductivity of the stretch shell (11) and the end cover (12) is not less than 50W / m·K.

6. An external rotor motor suitable for use in a cooker hood according to claim 5, characterised in that: The material of the stretch shell (11) is cast iron, and the material of the end cover (12) is aluminum alloy.

7. The external rotor motor suitable for use in a range hood according to claim 1, characterized in that: The two end covers (12) are respectively provided with a center hole for the center shaft (13) to pass through, and a bearing is arranged between the center shaft (13) and the center hole for reducing the friction between the center shaft (13) and the end cover (12).

8. The external rotor motor suitable for use in a range hood according to claim 1, characterized in that: The center shaft (13) is provided with an axial hole along the axial direction, and the axial hole is used for the cable of the inner stator to pass through.

9. An extractor hood, characterized in that The outer rotor motor of any one of claims 1-8 is included.

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