JPS5851436Y2 - Mounting structure of bell mouth for blower - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of mounting a bell mouth in, for example, an axial blower or an exhaust fan provided inside an air conditioner.

FIG. 1 is a schematic cross-sectional view of an air conditioner incorporating an axial blower, in which 1 is an impeller, 2 is a bell mouth, and 3 is a wall to which the bell mouth 2 is attached.

Conventionally, a structure as shown in FIG. 2 has been used.

In this figure, 2 is a bell mouth, 3 is a wall, and 4 is a cylindrical flange formed integrally with the wall 3 around a circular hole made in the wall 3 to allow the bell mouth 2 to pass through.

The bell mouth 2 was then attached to the wall 3 by welding to the 7-lunge 4.

However, this structure requires a lot of work and is not suitable for mass production, and in the case of materials that cannot be welded, it is necessary to fasten with bolts, which makes assembly work even more time-consuming.

This invention aims to eliminate the above-mentioned drawbacks.

Below, the structure of installing a bell mouth for a blower according to this invention will be explained with reference to Fig. 3 and below. 2 is a bell mouth, 2' is a bell mouth main body having a Y cylindrical shape with one end edge squeezed inward and folded back; 5 1 is a flange attached to the outer periphery near the other end of the bell mouth main body 2', 6 is a discontinuous portion of the flange 5 provided at a plurality of equal pitches, and 1 is a discontinuous portion of the flange 5 located at the center of the discontinuous portion 6. A wide-grain bullet is integrally folded outward from the edge of the bell mouth main body 2' on one side, and reference numeral 8 designates an outward-facing claw provided at the tip of the bullet 1.

The catching surface of this pawl 8 is made to be in the same plane as the surface of the flange 5 on the side where the bullet 7 is located.

Reference numeral 3 designates a wall to which the bell mouth 2 is attached; reference numeral 9 designates a circular hole through which the bell mouth main body 2'passes; and reference numeral 10 designates a plurality of notched holes provided around the circular hole 9 through which the bullets 7 pass.

In the device configured as described above, when the bell mouth 2 is pushed into the wall 3 while inserting the gun 7 into the notch 10, 7
The hooking surfaces of the lunge 5 and the claw 8 come into contact with the wall 3 and stop, and the bullet 7 pushes the bottom of the notch 10 with its elasticity and prevents the bell mouth 2 from being pulled out from the wall 3 due to its frictional force. prevent.

Further, the bell mouth 2 does not rotate due to the catch between the bullet I and the notch 10.

As described above, the structure of the bell mouth for a blower according to this invention is very easy to assemble, suitable for mass production, and no other parts are required regardless of the material, so it has great practical benefits.

In addition, since the bell mouth main body is fixed by the seven lunges formed on the outer periphery of the main body and the gunner's claw, for example,
Even if there is variation in the rigidity of the claw portion of the gun, the flange portion can limit the variation in the mounting center of the bell mouth body, and the influence on air blowing efficiency can be reduced.

[Brief explanation of the drawing]

Figure 1 is a schematic cross-sectional view of an air conditioner as an example of the use of an axial blower, Figure 2 is a cross-sectional view showing the structure of a conventional bell mouth installation, and Figure 3 is a cross-sectional view of the structure of a bell mouth installation for a blower according to this invention. The exploded perspective view shown in FIG. 4 is also a sectional view. The same reference numerals in the drawings indicate the same or equivalent parts, 2 is a bell mouth, 2' is a bell mouth main body, 3 is a wall, 5 is a flange,
6 is a discontinuous part, 7 is a bullet, 8 is a claw, 9 is a circular hole, 10
is a notch.

Claims (1)

[Scope of utility model registration request] A bell mouth main body 2' and a circumferentially discontinuous flange 5 are formed on the outer periphery of the main body 2', and a claw is integrally formed at the center of a plurality of discontinuous parts 6 that are discontinuous points of the flange 5. A bell mouth 2 formed with a bullet 7 having a bell mouth 8; The installation structure of the blower bell mouth is characterized by inserting and fixing the bell mouth into the wall 3.