JPH11325499A - Fan casing of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To match the abutting parts surely by correcting deformation at the time of molding. SOLUTION: Since a first protrusion 12 formed at the first abutting part 8a of a substantially semicircular casing is fitted in a first recess 13 made in a semicircular casing cover, deformation of side wall is corrected at the time of molding while abutting the protrusion and the recess surely. Consequently, air leak is eliminated and abnormal noise due to hitting of Sirocco fan can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan casing for an air conditioner, and more particularly to a fan casing in which a deformation shape generated during molding is corrected to correct an assembled shape.

[0002]

2. Description of the Related Art Conventionally, as shown in a schematic diagram of FIG. 1, a centrifugal fan 3 arranged in a ventilation passage 2 connecting an inlet 1a and an outlet 1b of an air conditioner 1 is housed therein, and a partition plate 4 is provided. As shown in the main part perspective view of FIG. 6 and the main part sectional view of FIG.
A semicircular first suction portion 7a and a first mating portion 8a are provided on both side walls 6, a locking claw 9 is provided outside the first mating portion 8a, and an outlet is provided at a front portion. A substantially semicircular casing 5a;
An upper part is opened, and a semicircular second suction part 7b which is continuous with the first suction part 7a on both side walls 6 and a second fitting which is in contact with the inside of the first fitting part 8a. A semicircular casing cover 5b having a portion 8b, a rib 10 provided outside the second mating portion 8b, and a locking hole 11 in which the locking claw 9 is fitted. The motor 5 is supported by a bearing 4a provided on the partition plate 4 in the casing 5a.
The centrifugal fan 3 driven by the above is accommodated and the casing cover 5b is covered. However, in this configuration,
If the side wall bends inward and outward during molding, the two mating portions cannot be fitted well, and a gap is opened, air leaks, or the centrifugal fan hits, causing abnormal noise. Was.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fan casing of an air conditioner which solves the above-mentioned problems and corrects deformation at the time of molding so that a fitting portion can be securely fitted. The purpose is.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is arranged in an air passage connecting an intake port and an air outlet, accommodates a centrifugal fan therein, and opens the lower part and the front part. A substantially semicircular shape having a semicircular first suction portion and a first mating portion on both side walls, a locking claw provided outside the first mating portion, and a blowout portion at a front portion. A casing, a top opening, a semicircular second suction portion continuous with the first suction portion on both side walls, and a second fitting portion abutting inside the first fitting portion. A semicircular casing cover having a first rib provided on the outside of the second joining portion and having a locking hole for fitting the locking claw to the first rib. In a fan casing of a harmonic machine, a first projection is formed on a first mating portion of the casing, and the first projection is fitted on the casing cover. And to provide a first recess.

The fan of the air conditioner, wherein the first convex portion is formed at the end of the first mating portion adjacent to the locking claw, while the first concave portion is formed in the first rib. Has a casing.

[0006] While a second convex portion is provided at the tip of the second mating portion, a second rib is provided inside the first mating portion, and the second rib is provided on the second rib. Is provided as a fan casing of an air conditioner provided with a second concave portion.

A second convex portion is provided at the tip of the second joining portion, while a second rib is provided inside the first joining portion, and the second rib is provided on the second rib. Is provided as a fan casing of an air conditioner provided with a through-hole for inserting the same.

[0008] An L-shaped ridge is formed inside the first mating portion and bent upward to form a groove, and the tip of the second mating portion is fitted into the groove. It is used as a fan casing for an air conditioner.

[0009]

As described above, in the fan casing of the air conditioner of the present invention, the first projection is formed on the first joining portion of the casing, and the first casing is formed on the casing cover. Since the first concave portion for fitting the convex portion is provided, the deformation of the side wall at the time of molding is corrected by fitting the first convex portion to the first concave portion, and the fitting portion is securely fitted. It is possible to prevent air leakage and prevent contact with the centrifugal fan. Also, an L-shaped ridge is formed on the inside of the first mating portion so as to be bent upward to form a groove, and the tip of the second mating portion is fitted into the groove. Deformation during molding is more corrected, preventing air leakage,
The contact of the centrifugal fan can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fan casing of an air conditioner according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an example of an air conditioner using a fan casing of an air conditioner according to the present invention. FIG. 2 is an exploded perspective view of a main part showing an example of a fan casing of the air conditioner according to the present invention. 3 is an enlarged perspective view of an essential part showing an embodiment of a fan casing of an air conditioner according to the present invention, FIG. 4 is an enlarged sectional view of an essential part showing an embodiment of a fan casing of an air conditioner according to the present invention, and FIG. Main part enlarged sectional view showing another embodiment of the fan casing of the air conditioner according to the present invention. FIG. 7 is a main part sectional view showing attachment of a centrifugal fan. As shown in the schematic diagram of FIG. 1, the inlet 1 a and the outlet 1
A partition 4 having a ventilation opening is defined in a ventilation path 2 connecting b, a fan casing 5 is attached to the partition 4, and the centrifugal fan 3 is accommodated in the fan casing 5. As shown in FIG. 7, the centrifugal fan 3 is supported by a bearing 4 a provided on the partition plate 4, is driven by a motor 20, and rotates inside the fan casing 5.

As shown in FIG. 3, the fan casing 5 is open downward and forward, and has a semicircular first suction portion 7a and a first joining portion 8a on both side walls 6. 1 is provided with a locking claw 9 outside the joining portion 8a, a substantially semicircular casing 5a provided with an outlet at the front part, and an upper side opened, and the side wall 6 is connected to the first suction part 7a. A second suction portion 7b having a semicircular shape and a second suction portion 7b abutting inside the first joining portion 8a.
A first rib 10 is provided outside the second fitting portion 8b, and the first claw 9 is attached to the first rib 10.
And a semicircular casing cover 5b formed with a locking hole 11 into which the cover is fitted.

FIG. 4 is an enlarged sectional view of an essential part showing an embodiment of the fan casing of the air conditioner according to the present invention.
In the figure, reference numeral 12 denotes a first convex portion, and the casing 5a
Is formed at the distal end of the first mating portion 8a adjacent to the locking claw 9. Reference numeral 13 denotes a first concave portion provided on the first rib 10 of the casing cover 5b so that the first convex portion 12 is fitted.

FIG. 5 is an enlarged sectional view of a main part of a fan casing of the air conditioner. In FIG. 5, reference numeral 14 denotes a second convex portion formed at the tip of the second joining portion 8b.
Reference numeral 15 denotes a second rib provided inside the first joining portion 8a. Reference numeral 16 denotes a second concave portion formed in the second rib 15 so that the second convex portion 14 is fitted. Also, 17 shown in FIG. 5- (B) is the second rib 1.
The second convex portion 14 is fitted into the through hole 5 formed in the hole 5. Reference numeral 18 shown in FIG. 5- (C) denotes an L-shaped ridge which is bent upward to form a groove 19 inside the first joining portion 8a. The tip of the second mating portion 8b is fitted into a groove 19 formed by the ridge portion 18.

Next, a description will be given of the assembling procedure of the embodiment shown in FIG. First, the casing 5a is attached to the partition plate 4, and the centrifugal fan 3 supported by the bearing 4a and connected to the motor 20 is housed in the casing 5a. Next, the casing 5a is covered with the casing cover 5b. First, the semicircular first suction portion 7a and the first mating portion 8a of the casing 5a are placed on the semicircular second suction portion of the casing cover 5b. 7b and the second fitting portion 8b are fitted together, and the locking claw 9 is fitted into the locking hole 11 formed in the first rib 10. At this time, the first convex portion 12 is fitted into the first concave portion 13 to correct deformation such as warpage generated during molding. For example, when the side wall 6 of the casing 5a is warped outward, the locking claw 9 is fitted into the locking hole 11 while pressing the side wall 6 inward, so that the first projection 12 Are fitted, and the warp is corrected and fixed.

In the case of FIGS. 5A and 5B, the second projection 14 is formed by the same procedure as in the case of FIGS.
Into the recess 16 or the through hole 17 of the second member. Also, FIG.
In the case of (C), the tip of the second joining portion 8b is fitted into the groove 19 by assembling in the same procedure. In the case of the embodiment shown in FIG. 4, the tip of the first joining portion 8a of the casing 5a is connected to the second joining portion 8 of the casing cover 5b.
In the case of the embodiment shown in FIG. 5, the tip of the first joining portion 8a of the casing 5a is brought into close contact with the second joining portion 8b of the casing cover 5b. Since the tip of the second mating portion 8b of the cover 5b is in close contact with the first mating portion 8a of the casing 5a, deformation during molding such as warpage can be more effectively corrected.

[0016]

As described above, according to the fan casing of the air conditioner according to the present invention, the first casing is formed.
While the first convex portion is formed in the joint portion of the above, the first concave portion for fitting the first convex portion is provided in the casing cover, so that the first convex portion is formed in the first concave portion. By the fitting, the deformation of the side wall at the time of molding is corrected, the fitting portion can be securely fitted, the air leakage can be prevented, and the contact of the centrifugal fan can be prevented. Also, an L-shaped ridge is formed inside the first joining portion to bend upward to form a groove,
Since the tip of the second mating portion is fitted into the groove, deformation during molding is further corrected, air leakage is eliminated, and a centrifugal fan is prevented from hitting, thereby preventing generation of abnormal noise. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of an air conditioner using a fan casing of an air conditioner according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of an embodiment of a fan casing of an air conditioner according to the present invention.

FIG. 3 is an enlarged perspective view of a main part showing one embodiment of a fan casing of the air conditioner according to the present invention.

FIG. 4 is an enlarged sectional view of a main part showing an embodiment of a fan casing of an air conditioner according to the present invention.

FIG. 5 is an enlarged sectional view of a main part showing another embodiment of the fan casing of the air conditioner according to the present invention.

FIG. 6 is a perspective view of a main part showing a fan casing of a conventional air conditioner.

FIG. 7 is a sectional view of a main part showing attachment of a centrifugal fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 1a Suction port 1b Outlet 2 Air path 3 Centrifugal fan 4 Partition plate 4a Bearing part 5 Fan casing 5a Casing 5b Casing cover 6 Side wall 7a First suction part 7b Second suction part 8a First joining Part 8b Second mating part 9 Locking claw 10 First rib 11 Locking hole 12 First convex part 13 First concave part 14 Second convex part 15 Second rib 16 Second concave part 17 Through Hole 18 L-shaped ridge 19 Groove 20 Motor

Claims (5)

[Claims] 1. A centrifugal fan is disposed in an air passage connecting an inlet and an outlet, and a centrifugal fan is accommodated in the air passage. And a substantially semicircular casing having a locking claw provided on the outside of the first mating portion and having a blow-out portion at the front, and an upper opening, and the first wall is formed on both side walls. A semicircular second suction portion continuous with the suction portion, and a second mating portion abutting on the inside of the first mating portion, and a first mating portion on the outside of the second mating portion; And a semicircular casing cover having a locking hole for fitting the locking claw into the first rib. A first joining of the casing An air conditioner, wherein a first concave portion is provided in the casing cover while the first convex portion is formed in the casing cover. Of the fan casing. 2. The method according to claim 1, wherein the convex portion is formed at a tip of a portion of the first mating portion adjacent to the locking claw, while the first concave portion is formed in the first rib. Item 7. A fan casing of the air conditioner according to item 1. 3. A second projection is provided at the tip of the second mating portion, while a second rib is provided inside the first mating portion, and the second rib is provided on the second rib. The fan casing for an air conditioner according to claim 1 or 2, further comprising a second concave portion for fitting the convex portion. 4. A second projection is provided at the tip of the second mating portion, while a second rib is provided inside the first mating portion, and the second rib is provided on the second rib. The fan casing for an air conditioner according to claim 1 or 2, wherein a through-hole through which the projection is inserted is provided. 5. An L-shaped ridge, which is bent upward to form a groove, is provided inside the first joining portion, and the second groove is provided in the groove.
The fan casing of an air conditioner according to claim 1 or 2, wherein a front end of the joining portion is fitted.