JPH0542696U - Small blower - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a small blower capable of reducing the cost of materials by reducing the number of parts and reducing the number of assembly steps. An anti-suction side plate 3 provided on the anti-suction side of a spiral fan casing 2 having a suction port 2a surrounding the impeller 1, an anti-load side electric motor housing 4 and a load side electric motor housing 11 are provided. The anti-load side electric motor housing 4 or the load side electric motor housing 11 is integrally formed with the anti-suction side side plate 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small blower used for an air conditioner or the like.

[0002]

[Prior Art]

 Conventionally, this type of small blower generally has a configuration as shown in FIGS.

That is, as shown in the figure, a stator 101 of an electric motor is equipped with an electric winding 102 and is press-fitted and fixed inside an electric motor housing A 103. The stator 101 has a rotor 104 and a rotary shaft 105 press-fitted into the rotor 104, and bearings 106 and 107 are provided on both sides of the rotary shaft 105.

Further, the electric motor housing B108 is mounted in a direction opposite to the electric motor housing A103 so as to cover the stator 101 and the like to form an electric motor 109. Each part is provided with a flange 110 in the outer peripheral direction.

Further, a blade core plate 112 of the impeller 111 has a bowl-shaped portion 113, and the impeller is surrounded by a fan casing 114. An electric motor mounting hole, which is slightly larger than the outer diameter of the electric motor housing, is formed in the non-suction side plate 115 of the fan casing 114. And was attached to the non-suction side plate 115 by the mounting screw 116 at the flange 110 portion.

[0006]

[Problems to be solved by the device]

 In such a conventional small blower, two types of motor housings A103 and B108 are required, the number of parts is large, it is difficult to manage parts, and the number of assembling steps is also large. In addition, the molds for molding the motor housings A103 and B108 require two kinds of complicated shapes, so that the mold cost becomes very high.

The present invention solves the above problems, and it is a first object of the present invention to provide a small blower capable of reducing the number of parts to reduce the material cost and the assembly man-hours to reduce the cost. To aim.

A second object is to facilitate the processing of parts and reduce the die cost.

[0009]

[Means for Solving the Problems]

 In order to achieve the first object, the small blower of the present invention has a first means, which is a spiral casing having a suction port surrounding an impeller, and an anti-suction side of the fan casing. A suction side plate, and a load side motor housing and a non-load side electric motor housing that house a stator and a rotor wound with electric windings, and the load side electric motor housing or the anti-load side electric motor housing is the anti-suction side. The structure is formed integrally with the side plates.

Further, in order to achieve the above-mentioned second object, the second means has a support portion for supporting the bearing at the center, and has a brim portion attached to the non-suction side plate at the end with a U-shaped cross section. The formed bearing supporting member is used as a load-side motor housing.

[0011]

[Action]

 According to the present invention, the anti-suction side plate of the fan casing and the load side motor housing or the anti-load side motor housing of the electric motor are integrally formed by the configuration of the above-mentioned first means, so that the number of parts can be reduced and the parts can be managed. It will be easier, the assembly will be simplified, and the cost will be lower.

Further, according to the structure of the second means, by making the load side electric motor housing a bearing supporting member of a simpler shape that supports only the bearing, the temperature rise of the electric motor is mitigated and the electric motor is The housing can be easily processed, and the die cost can be reduced.

[0013]

【Example】

 First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in the figure, the impeller 1 is surrounded by a spiral fan casing 2 having a suction port 2a, and the anti-suction side plate 3 of the fan casing 2 has a cylindrical anti-load having a bearing house at the bottom. The side electric motor housing 4 is integrally formed, and a stator 6 having an electric winding 5 is press-fitted and fixed inside the anti-load side electric motor housing 4. Inside the stator 6, a rotor 7, a rotary shaft 8 press-fitted and fixed to the rotor 7, and bearings 9 and 10 on both sides of the rotary shaft 8 are provided. Then, the load side motor housing 11 is attached and fixed to the inner surface of the non-suction side side plate 3 of the fan casing 2 from the load attachment side so as to cover the electric winding 5 by the attachment screws 12. Further, a bowl-shaped portion 14 is provided in the center of the blade core plate 13 of the impeller 1 in the suction direction, and a part of the load-side electric motor housing 11 is housed inside the bowl-shaped portion 14. It

As described above, according to the small blower of the first embodiment of the present invention, since the anti-load side electric motor housing 4 is integrally formed with the anti-suction side side plate 3 of the fan casing 2, the anti-load side electric motor housing 4 is formed. Since it is not necessary to provide a separate member, the number of parts can be reduced, parts management can be facilitated, and assembly can be simplified and costs can be reduced.

Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. As shown in the figure, the bearing support has a support portion 15 for supporting the bearing 10 in the center and a flange portion 17 having a U-shaped cross section and an attachment hole 16 for attaching to the non-suction side plate 3 at the end portion. The member 18 constitutes a load-side electric motor housing.

As described above, according to the small blower of the second embodiment of the present invention, since the electric winding 5 is exposed inside the fan casing 2, the heat dissipation effect of the electric motor is improved and the temperature rise of the electric motor is reduced. In addition, by using the bearing supporting member 18 having a simple shape that supports only the bearing 10, it is possible to reduce the die cost for molding the anti-load side motor housing.

Although the anti-load side electric motor housing 4 is integrally formed with the anti-suction side side plate 3 in the first embodiment, it goes without saying that the load side electric motor housing 11 may be integrally formed.

[0018]

[Effect of the device]

 As apparent from the above-described embodiments, according to the present invention, the anti-suction side plate of the fan casing and the anti-load side motor housing or the load side motor housing of the electric motor are integrally formed, so that the number of parts can be reduced. In addition, it is possible to provide a small blower that facilitates component management, simplifies assembly, and reduces costs.

Further, by making the load-side motor housing a bearing supporting member that is simplified to support only the bearing, machining can be facilitated, die cost can be reduced, and the heat radiation effect of the motor can be reduced. It is possible to provide a small blower that can reduce the temperature rise of the electric motor.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a small-sized blower according to a first embodiment of the present invention.

FIG. 2 is a bottom plan view of the same.

FIG. 3 is a partially cutaway side view of the small blower of the second embodiment.

FIG. 4 is a bottom plan view of the same.

FIG. 5 is a perspective view of a bearing supporting member of the same load side.

FIG. 6 is a perspective view of a load side electric motor housing of a conventional small blower.

FIG. 7 is a partially cutaway side view of the same small blower.

FIG. 8 is a bottom plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impeller 2 Fan casing 2a Suction port 3 Anti-suction side plate 4 Anti-load side electric motor housing 5 Electric winding 6 Stator 7 Rotor 9,10 Bearing 11 Load side electric motor housing 15 Support part 17 Collar part 18 Bearing support member

Claims (2)

[Scope of utility model registration request] 1. A spiral fan casing which surrounds an impeller and has a suction port, an anti-suction side plate provided on the anti-suction side of the fan casing, a stator around which an electric winding is wound, and A small blower comprising a load-side electric motor housing having a rotor built-in and an anti-load-side electric motor housing, wherein the load-side electric motor housing or the anti-load-side electric motor housing is formed integrally with the anti-suction side plate. 2. The load side electric motor housing is a bearing supporting member having a support portion for supporting a bearing in the center and a collar portion having a U-shaped cross section and an end portion formed with a collar portion to be attached to the side plate on the non-suction side. Small blower described.