Motor, axial fan using said motor, and axial fan used for indoor machine of air conditioner

Abstract

A motor 56 is provided with a stator, a supporting shaft fixed to the stator concentrically, a cup-shaped rotor arranged outside virtually in the radial direction with respect to the stator and driven to rotate around the stator, and a rotation support member that is arranged between the supporting shaft and the rotor to support the rotor, in such a way as to be freely rotatable to the support shaft. The axial fan 23, one end of the direction of the axial line of which is fixed, for a room unit 55 of the air conditioner is fixed coaxially with the rotor. Thus the object of the invention is to increase the capability of the room unit of an air conditioner by reducing the number of parts and by shortening the length in the direction of the axial line of a motor.

Description

technical field [0001] The present invention relates to a motor in which a rotor is disposed radially outward of a stator and driven to rotate around the stator, an axial fan using the motor, and an axial fan for an indoor unit of an air conditioner. Background technique [0002] Figure 12 It is a cross-sectional view of a conventional thin outer rotor brushless DC motor (hereinafter referred to as a motor) 1 . Below, refer to Figure 12 The configuration of the motor 1 will be described. [0003] In the motor 1 , a coil is wound around an iron core 2 to form a substantially cylindrical stator 4 . [0004] A substantially cylindrical rotor 5 made of permanent magnet pieces or the like is arranged radially outward of the stator 4 at a distance from the stator 4 . One end portion in the axial direction of the rotor 5 constitutes a connecting portion 6 extending radially inward, and a sleeve 7 is provided integrally with the connecting portion 6 in the hollow portion of the ...

AI Technical Summary

Problems solved by technology

[0005] In such a motor 1, the sleeve 7 is required as a component to realize the rotor 5, and there is a problem of increasing the number of components and complicating the configuration.

[0006] In addition, this motor 1 is provided with the bearings 10 and 11 arranged at intervals in the axial direction from the stator 4 and the rotor 5 at both ends in the axial direction of the casing 9 surrounding the stator 4 and the rotor 5 from the outside as described above. Therefore, There is a problem that the axial length of the motor 1 is increased and the structure is enlarged

[0007] In addition, when the motor 1 is connected to, for example, an axial flow fan, etc., it is necessary to connect to the connection portion protruding from the above-mentioned bearing 11 of the rotary shaft 8. Therefore, there is a problem that the structure including the axial flow fan becomes larger.

[0008] In addition, as the above-mentioned axial flow fan, in the case of an indoor unit of an air conditioner, the axial length of the motor 1 is increased so that the axial length of the axial flow fan is limited, and the generated air volume is reduced to reduce the performance of the indoor unit.

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