JPH07158584A - Cross flow fan - Google Patents

Abstract

PURPOSE:To provide a cross flow fan which is constituted to reduce the occurrence of bending during rotation, provide excellent damping ability, and reduce the generation of noise. CONSTITUTION:Formation of a cross flow fan is such that partition plates 3 are arranged at intervals of a proper distance between end plates 1 and 2 at two ends and blades 4 are arranged between the end plates 1 and 2 and the partition plate 3 and between the partition plate 3 and the partition plate 3 at a portion closer to a central part than the two end parts. The end plates 1 and 2 are formed of a material softer than a material of which the partition plate 3 and the blade 4 are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow fan which has little deflection during high speed rotation and is excellent in vibration damping.

[0002]

2. Description of the Related Art As a conventional cross flow fan, for example, the one disclosed in Japanese Utility Model Laid-Open No. 4-119386 is known. That is, partition plates are provided at appropriate intervals between the end plates at both ends, between the end plate and the partition plate at both ends, and at the part closer to the center than both ends, the partition plate and the partition plate are separated from each other. Blades in between,
The end plate on one end side is the motor end plate, the end plate on the other end side is the bearing end plate, and the motor end plate is provided with a rubber boss and a mounting shaft for vibration absorption and mounting. The shaft is attached to. The motor end plate is fixed to the driving motor by screws, and the bearing end plate has a shaft rotatably supported by the bearing.

In the cross-flow fan constructed as described above, the upper blade, the supporting plate and the end plate are made of the same synthetic resin material, and the restriction is defined by the strength of the fan and mainly the deflection during rotation. Especially when the fan diameter is large or the fan is long in the axial direction, a hard material must be used.

[0004]

However, in such a cross flow fan, the end plate, the partition plate and the blade are made of the same material, and since it is a hard material, the electric vibration noise generated by the drive motor is generated. Is transmitted to the motor end plate and the blade through the rubber boss, and resonates to generate a large noise, resulting in a very bad sense of hearing.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cross-flow fan that has less deflection during rotation, excellent vibration damping properties, and less noise.

[0006]

In order to solve this problem, the present invention provides partition plates at appropriate intervals between the end plates at both ends, and at both ends, between the end plates and the partition plate, A cross-flow fan in which a blade is provided between a partition plate and a partition plate in a portion closer to the center than both ends, wherein the end plates are made of a material softer than the blade and the partition plate. Is.

[0007]

As described above, by constructing the end plate with a material softer than the blade and the partition plate, it is possible to provide a cross flow fan that has less deflection during rotation, excellent vibration damping properties, and less noise. .

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6, the cross flow fan is provided with partition plates 3 made of synthetic resin at appropriate intervals between the end plates 1 and 2 made of synthetic resin at both ends, and the end plates 1 and 2 are separated from each other at both ends. A blade 4 made of a synthetic resin is provided between the partition plate 3 and the partition plate 3 between the partition plate 3 and the partition plate 3 at a portion closer to the center than both ends. It is connected in the axial direction by a method such as ultrasonic fusion. The end plate 1 on one end side is a motor end plate, the end plate 2 on the other end side is a bearing end plate, and the motor end plate 1 is provided with a rubber boss 5 and a mounting shaft 6 for absorbing and mounting vibrations. A shaft 7 is attached to the bearing end plate 2. Further, the motor end plate 1 is fixed to a driving motor 8 with a screw 9, and the bearing end plate 2 has a shaft 7 rotatably supported by a bearing 10.

The motor end plate 1 and the bearing end plate 2 of the cross flow fan having such a structure are made of a material softer than the partition plate 3 and the blade 4. With this configuration, it is possible to provide a cross-flow fan that has less deflection during high-speed rotation, has excellent vibration damping properties, and has less noise.

By the way, in order to configure the motor end plate 1 and the bearing end plate 2 with a material softer than the partition plate 3 and the blade 4, in this embodiment, the motor end plate 1, the bearing end plate 2 and the partition Glass fibers are mixed into the plate 3 and the blade 4 so that the weight ratio of the glass fibers contained in the end plates 1 and 2 is lower than the weight ratio of the glass fibers contained in the partition plate 3 and the blade 4.

More specifically, the base material of the motor end plate 1, the bearing end plate 2, the partition plate 3 and the blade 4 is AS (acrylonitrile-styrene resin), and glass fiber is mixed into the base material, Both end plates 1,
The weight ratio of the glass fibers contained in 2 is less than 30%, and the weight ratio of the glass fibers contained in the partition plate 3 and the blade 4 is 30% or more.

[0012]

As described above, according to the present invention, since the end plate is made of a material softer than the blade and the partition plate, the cross flow has less deflection during rotation, excellent vibration damping property, and less noise. A fan can be provided.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a cross flow fan according to an embodiment of the present invention.

FIG. 2 is an overall cross-sectional view of the same cross flow fan.

FIG. 3 is a perspective view of a blade mounting portion on the motor end plate side.

FIG. 4 is a sectional view of a blade mounting portion on the motor end plate side.

FIG. 5 is a perspective view of a blade mounting portion on the bearing end plate side.

FIG. 6 is a sectional view of a blade mounting portion on the bearing end plate side.

[Explanation of symbols]

 1 Motor End Plate 2 Bearing End Plate 3 Partition Plate 4 Blade 5 Rubber Boss 6 Mounting Axis 7 Axis 8 Motor 9 Screw 10 Bearing

Claims (3)

[Claims] 1. A partition plate is provided between the end plates at both ends at appropriate intervals, the partition plate and the partition plate are provided between the end plate and the partition plate at both ends, and at the part closer to the center than both end parts. A cross flow fan in which a blade is provided between each of the plates and the plate, wherein the end plate is made of a material softer than the blade and the partition plate. 2. The glass fiber is mixed into the end plate, the partition plate and the blade, and the weight ratio of the glass fiber contained in the end plate is lower than the weight ratio of the glass fiber contained in the blade and the partition plate. Cross flow fan. 3. A base material for an end plate, a partition plate and a blade constituting a cross flow fan is AS, glass fibers are mixed into this base material, and a weight ratio of the glass fibers contained in the end plate is less than 30%. The cross flow fan according to claim 1, wherein the weight ratio of the glass fibers contained in the partition plate and the blade is 30% or more.