JPH0571766A - Front grill for outdoor machine for air-conditioner - Google Patents

Abstract

PURPOSE:To reduce the generation of noise of interference with the flow of air discharged from an impeller and the generation of peel noise owing to peel by a method wherein the sectional shape in an axial direction of the impeller of a grill forms a vane shape and a mounting angle is caused to match with a main flow direction. CONSTITUTION:The sectional shape in an axial direction of the impeller of a grill 7 forms a vane shape and a horizontal beam row where a mounting angel is matched with a main flow direction. Noise of interference with the flow of air discharged from an impeller 3 is suppressed and the occurrence of peel is reduced and the generation of peel noise is suppressed. Further, resistance of the swirl component of the flow of air discharged through the impeller 3 is reduced, and a grill beam in the shape of a vane is aligned in a rectangular shape to improved flow rate performance. Simultaneously, a mounting angle is caused to match with a main flow direction to suppress the generation of interference noise and the occurrence of peel is reduced to suppress the generation of peel noise.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an outdoor unit for an air conditioner,
The present invention relates to a grill used for devices that must surround a blower fan for security reasons.

[0002]

2. Description of the Related Art An outdoor unit of an air conditioner having a conventional outlet front grille will be described with reference to the drawings.

As shown in FIG. 6, an impeller 3 and a motor 4 are housed in a space surrounded by a heat exchanger 1 and an exterior plate 2,
An orifice 5 is provided around the impeller 3. The exterior plate 2 facing the downstream side of the impeller 3 is provided with a blowout port 6, and a grill 7 is attached to the outside thereof. The motor 4 is fixed to the exterior plate 2 by a motor support base 8.

In such a structure, the rotation of the impeller 3 directly connected to the motor 4 sucks in air from the heat exchanger 1 side and discharges it from the grill 7 through the outlet 6 to the outside.

The grill 7 is made of the same material as that of the exterior plate 2, and has a circular cross-sectional shape in the axial direction of the impeller, which is arranged in a grid pattern on a parallel plane at a distance from the front surface of the exterior plate 2. ing.

[0006]

However, in the case of the above-mentioned grill shape, the interference sound with the flow of the air discharged from the impeller 3 and the separation sound become high, which promotes the noise level of the outdoor unit as a whole. Had a problem.

The present invention is intended to solve the above-mentioned problems of the conventional example, and it is an object of the present invention to suppress the above-mentioned interference noise and peeling noise as much as possible and reduce the noise level of the outdoor unit as a whole.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a horizontal cross row in which the cross-sectional shape of the above-mentioned grille in the axial direction of the impeller is a wing shape, and the attachment angle is adjusted to the mainstream direction to reduce ventilation resistance. Is.

Further, since the flow of air discharged from the rotating impeller has diffusion and swirling components, the cross-sectional shape of the grille in the axial direction of the impeller is made into a wing shape, and the mounting angle is adjusted to the mainstream direction. Further, the crosspieces are arranged in a rectangular shape in order to further reduce the resistance of the swirling component of the flow.

Further, in the case of the rectangular crosspiece, the flow is disturbed at the corners to increase the sound, or the ventilation resistance becomes large, which leads to a loss of the flow rate, so that the corners are not connected in a blade shape.

Further, in order to reduce the resistance of the diffusion and swirling components, the cross-sectional shape of the grille in the axial direction of the impeller is a wing shape, and the mounting angle is aligned with the mainstream direction to form a circular row.

[0012]

According to the present invention, the cross-sectional shape of the grill in the axial direction of the impeller is made into a wing shape, and the horizontal crosswise row is arranged so that the mounting angle is aligned with the mainstream direction. It is also possible to suppress peeling and reduce peeling noise to suppress peeling noise.

Further, in order to reduce the resistance of the swirling component of the flow of the air discharged from the impeller, the blade-shaped grille bars are arranged in a rectangular shape to improve the flow rate performance, and at the same time, the mounting angle is adjusted to the mainstream direction to cause interference. The sound can be suppressed and the peeling can be reduced to suppress the peeling noise.

Further, a part of the blade shape at the corner portion is cut out to reduce the turbulence of the flow to reduce the generation of sound and at the same time improve the flow rate performance.

Further, by forming the circular crosspiece, the resistance of the swirling component is further reduced to improve the flow rate performance, and at the same time, by adjusting the mounting angle to the mainstream direction, the interference noise is suppressed and the peeling noise is also suppressed to reduce the peeling noise. be able to.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, but the description will be omitted because the air blowing path to the air outlet is the same as the conventional one. FIG. 1 is a front view and a cross-sectional view of a horizontal grill in which the mounting angle is adjusted to the mainstream direction in the first embodiment.
(1,1) to (24,6) are attached. The solid line in the outer frame indicates the horizontal rail. The broken line in the cross-sectional view shows the mounting angle aligned with the mainstream direction. The AA cross section, that is, the mounting angles of the horizontal bars 11 (1, 5) to (24, 5) are shown. BB cross section, that is, horizontal crosspiece 11 (1, 2) ~
The mounting angle of (24, 2) is shown. FIG. 2 is a sectional view of the horizontal rail.

FIG. 3 is a front view and a sectional view of a rectangular grill in which the mounting angle is adjusted to the mainstream direction in the second embodiment, and the crosspiece 11 (1) is attached to the outer frame 9 and the support rods 10-a to 10-h. ，
1) to (8, 11) are attached. The solid line in the outer frame indicates the crosspiece. The broken line in the cross-sectional view shows the mounting angle aligned with the mainstream direction. A-A cross section, that is, crosspiece (2, 4)
The installation angles of (2, 9) are shown. The BB cross section, that is, the mounting angles of the crosspieces (8, 4) to (8, 9) are shown. The cross section of the crosspiece is the same as that of the first embodiment and is shown in FIG.

FIG. 4 is a perspective view of the third embodiment, and the second embodiment
The vicinity of the arrow in FIG. Cross (5,7)
And connecting rod 12 from the ends of crosspieces (6, 7) to support rod 1
Connect to 0.

FIG. 5 is a front view and a cross-sectional view of a circular grill in which the mounting angle is adjusted to the mainstream direction in the fourth embodiment. The outer frame 9 and the supporting rods 10-a to 10-h have circular bars 11-.
a to 11-k are attached. The broken line in the cross-sectional view shows the mounting angle aligned with the mainstream direction. The AA cross section, that is, the attachment angles of the circular bars 11-b to 11-g are shown. The cross section of the circular crosspiece is the same as that of the first embodiment and is shown in FIG.

[0020]

As is apparent from the above description, the present invention has the following advantages.
By setting the cross-sectional shape of the grille in the axial direction of the impeller to be a wing shape and adjusting the mounting angle to the mainstream direction, the impeller 3
The noise of interference with the flow of air discharged from the chamber and the peeling noise caused by peeling can be suppressed to be lower than the conventional shape, and the noise level when the grill is attached to the exterior plate 2, that is, noise as an outdoor unit. The level can be lower than the conventional one with the same air volume.

Further, by arranging the grille bars in a rectangular shape, the resistance of the swirling component of the flow is reduced and the flow rate performance is improved. At the same time, the mounting angle can be adjusted to the mainstream direction to suppress the interfering sound and reduce the peeling to suppress the peeling noise.

Further, by notching a part of the blade shape at the corner portion, the resistance in the radial direction (diffusion component) is reduced and the flow rate performance is improved. At the same time, it reduces the turbulence of the flow and reduces the generation of sound.

Further, by forming the circular crosspiece, the resistance of the swirling component is further reduced and the flow rate performance is improved.
At the same time, interference noise can be suppressed by adjusting the mounting angle to the mainstream direction, and peeling noise can be suppressed by reducing peeling.

[Brief description of drawings]

FIG. 1 (a) is a front view of a horizontal cross-section grill with an airfoil cross-sectional shape according to a first embodiment of the present invention (b) is a cross-sectional view taken along the line AA, and (c) is a cross-sectional view taken along the line BB.

FIG. 2 is a cross-sectional view of the horizontal rail of the first embodiment.

FIG. 3 (a) is a front view of a rectangular cross-section grill having a blade-shaped cross section according to the second embodiment of the present invention (b) is a sectional view taken along line AA of FIG. 3 (c) is a sectional view taken along line BB thereof.

FIG. 4 is an enlarged front view of a corner portion of a rectangular bar grill having a wing shape in section according to a third embodiment of the present invention.

FIG. 5 (a) is a front view of a circular bar grill with an airfoil cross-sectional shape according to a fourth embodiment of the present invention. FIG.

FIG. 6A is a cross-sectional view of a conventional air conditioner, and FIG. 6B is an enlarged view of the relevant part.

[Explanation of symbols]

 1 Heat Exchanger 2 Exterior Plate 3 Impeller 4 Motor 5 Orifice 6 Outlet 7 Grill 8 Motor Support 9 Outer Frame 10 Support Bar 11 Horizontal Bar 12 Connecting Rod

Claims (4)

[Claims] 1. An air blower for discharging air from an impeller to the outside through an outlet, provided on the downstream side of the outlet, and the impeller has an axial cross-sectional shape of a wing shape and its mounting angle is adjusted to the mainstream direction. Front grille for outdoor unit of air conditioner, which is composed of horizontal horizontal rows. 2. The front grill for an outdoor unit of an air conditioner according to claim 1, wherein the front grille has an airfoil shape and is composed of a rectangular row of rows whose mounting angles are aligned with the mainstream direction. 3. The front grill for an outdoor unit of an air conditioner according to claim 2, wherein a notch is formed in a corner portion with a rectangular crosspiece. 4. The front grill for an outdoor unit of an air conditioner according to claim 1, wherein the front grille has an airfoil shape and is composed of circular rows whose mounting angles are aligned with the mainstream direction.