JPH10185238A - Blowing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase an air volume by mounting a centrifugal fan having a large air volume in the same space. SOLUTION: Corners of inner peripheral edges of front ends of blades 10b of a centrifugal fan 10 are cut into a curved shape or into a straight shape, and the ends of the blades are overlapped with a bell-mouth 12a forming a suction port 20, whereby the length (width) of the blades of the centrifugal fan can be made longer to increase an air volume. Accordingly, a blowing apparatus mounted with a centrifugal fan having more of an air volume in the same space can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower, and more particularly, to a blower used on the indoor side of an integrated air conditioner.

[0002]

2. Description of the Related Art As shown in FIG. 1, for example, a conventional blower has an air conditioner having a partition plate 4 erected substantially at the center of a base 1 and divided into an indoor side 2 and an outdoor side 3. The blower disposed on the indoor side 2 of the indoor heat exchanger 1 is disposed on the lower back side of the front panel 17 attached to the front side of the indoor side 2.
3, a centrifugal fan 10 in which one end of a plurality of blades 10b is fixed to a peripheral edge of one side of a circular end plate 10a, and the outer periphery of the other end of the blade 10b is connected; A spiral casing 11 for guiding air sucked in from the front of the centrifugal fan 10 upward, and the centrifugal fan 10 at the center of a vertically arranged flat plate as shown in FIG. A bell mouth 12a whose corresponding peripheral portion is curved in a bell shape to form the suction port 20
Is located away from the tip of the centrifugal fan 10, and the upper portion is bent forward to form a suction wall 12b having a blowing wall 12b.
And a blow-off frame 15 and the like, which open above the spiral casing 11 and lead the air led out from the spiral casing 11 to the upper front, and the like.
From the lower suction port 17a of the indoor heat exchanger 13
The conditioned air that has passed through the
7b. In recent years, it has been desired to cope with space saving and high efficiency, and it is indispensable to mount a centrifugal fan with a large air volume in a limited space. Therefore, as a method of increasing the air volume of the centrifugal fan, it is conceivable to increase the diameter of the centrifugal fan or to lengthen the axial length (width) of the centrifugal fan. Therefore, the above object could not be achieved.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a blower in which a centrifugal fan having a large air flow is mounted in the same space to increase the air flow.

[0004]

According to the present invention, there is provided a centrifugal fan in which one end of a plurality of blades is fixed to a peripheral edge of one side of a circular end plate and the outer periphery of the other end of the blade is connected.
In a blower that houses the centrifugal fan and a spiral casing that draws out air sucked from a front suction port of the centrifugal fan in a centrifugal direction, a corner of the inner peripheral edge of the other end of the blade of the centrifugal fan is cut out. Then, the tip of the blade was overlapped with the bell mouth forming the suction port. Also,
The notch was formed into a curved shape or a straight shape.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS With the above construction, in the blower of the present invention, the corner of the inner peripheral edge at the other end of the blade of the centrifugal fan is cut off in a curved or linear shape, and the tip of the blade is cut off. Is superposed on the bell mouth forming the suction port, so that the length (width) of the blades of the centrifugal fan can be increased to increase the air volume, and a centrifugal fan with a larger air volume can be installed in the same space. Can be provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A blower according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side sectional view showing a main part of an integrated air conditioner according to the present invention, and FIG. 2 is a side sectional view showing a main part of an embodiment of a blower according to the present invention. Since FIG. 1 has been described in the section of the prior art, the description thereof will be omitted. As shown in FIG. 2, the length (width) of each of the blades 10b of the centrifugal fan 10 in which one end of the plurality of blades 10b is fixed to the peripheral edge of one side of the circular end plate 10a and the outer periphery of the other end of the blade 10b is connected. L0 is extended by L1, and an overlapping interference portion with the bell mouth 12a forming the suction port 20 is cut out to provide a curved notch 10c or a straight notch 10d, and the bell mouth of the blade 10b and the suction plate 12 is provided. The bell mouth 12a of the suction plate 12 is prevented from hitting the inner peripheral edge of the front surface of the blade 10b of the centrifugal fan 10 by superimposing 12a.

[0007]

As described above, according to the blower according to the present invention, the corner of the inner peripheral edge of the other end of the blade of the centrifugal fan is cut off in a curved shape or a straight shape, and the tip of the blade is sucked into the suction port. By polymerizing with the bell mouth that forms the mouth,
The length (width) of the blades of the centrifugal fan can be increased to increase the air volume, and a blower having a centrifugal fan with a larger air volume installed in the same space can be provided.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an air conditioner according to the present invention.

FIG. 2 is a sectional side view of a main part showing one embodiment of a blower according to the present invention.

FIG. 3 is a sectional side view of a main part showing a conventional blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Indoor side 3 Outdoor side 4 Partition plate 5 Fan motor 6 Compressor 10 Centrifugal fan 10a Circular end plate 10b Blade 10c Curved notch 10d Linear notch 11 Spiral casing 12 Suction plate 12a Bell mouth 12b Blowing wall 13 Indoor heat exchanger 15 Outlet frame 17 Front panel 17a Lower inlet 17b Upper outlet 20 Inlet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokihiko Tanaka 1116 Suenaga, Takatsu-ku, Kawasaki City Fujitsu General Limited

Claims (3)

[Claims] 1. A centrifugal fan in which one end of a plurality of blades is fixed to a peripheral edge of one surface of a circular end plate and the other end of the blade is connected, and the centrifugal fan is housed. In a blower comprising a spiral casing for drawing out sucked air in a centrifugal direction, a corner of the inner peripheral edge of the other end of the blade of the centrifugal fan is cut off, and a tip of the blade forms the suction port. A blower characterized by being superposed on a mouse. 2. The blower according to claim 1, wherein the notch has a curved shape. 3. The blower according to claim 1, wherein the notch has a linear shape.