JPH0634156A - Suction grille - Google Patents

Abstract

PURPOSE:To obtain a suction grille whose draft resistance or noise is small by slanting many sash bars of the suction grille in the same direction and denting the side of the end of the lee sash bars. CONSTITUTION:Suction grilles, to which two hooks 17 or reinforcing articles 18, 19 and 20 are mounted, are formed with a resin material, thereby forming frames 16a and sash bars 16b. The sash bars 16b are slanted to the side of a fan, and what is more, there are formed notched parts 16c which enlarge the clearance between the adjacent sash bars compared with the prior art rear end 50 on the rear end of the sash bars 16b on the suction side. The profile of the notched pars 16c on the lee end is dented by its formation. The dented portions increase the clearance between the adjacent sash bars or more precisely a draft passage of suction air, which makes it possible to minimize the draft resistance of the suction air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction grill in which a large number of crosspieces arranged in a suction portion of an exterior body are inclined in the same direction.

[0002]

2. Description of the Related Art A suction grill in which a large number of crosspieces are arranged in a suction portion of an exterior body is disclosed in, for example, Japanese Utility Model Publication No. 3-11622. The crosspiece described in this publication is inclined to the side opposite to the outlet, and the gap between the crosspieces is set to be substantially the same at the front end and the rear end of the suction side surface.

[0003]

In the above-mentioned bar of the suction grille, the rear end 50 of the suction side surface protrudes in a triangular shape toward the suction passage side with respect to the perpendicular to the exterior body as shown in FIG. The ventilation resistance of the intake air was large. Also, the noise was louder as the ventilation resistance was higher.

The present invention provides a suction grill with low ventilation resistance and low noise.

[0005]

According to the present invention, in a suction grill in which a large number of crosspieces are inclined in the same direction, the side surface of the leeward side end of the crosspieces is recessed.

[0006]

In this suction grill, since the side surface of the leeward side end of the crosspiece is recessed, the gap between adjacent crosspieces by the recess,
That is, the ventilation path for the intake air is large.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 2, reference numeral 1 denotes an exterior body that incorporates the heat exchanger 2, the drain pan 3, and the blower 4, and the exterior body is suspended in the ceiling space. Reference numeral 5 is a decorative panel that is airtightly attached to the lower portion of the exterior body and the ceiling plate 6.

In FIGS. 3 to 6, reference numeral 7 denotes a blowing device, which includes wind direction changing plates 8 and 9, an interlocking plate 10, a motor 11 for driving the wind direction changing plate 8, and a blowing frame 12 to which these are mounted. Composed of and. A display device 13 includes a mounting plate 14 having a brand name and a model name on its surface, and a display board 1 mounted on the mounting plate and having a display lamp and the like.
5 and. Reference numeral 16 is a suction grill to which two hooks 17 and metal reinforcing tools 18, 19 and 20 are attached. The suction grill is made of a resin material and has a frame 16a and a crosspiece 16b. And the support parts 18a and 20a into which the insertion part 21a of the air filter 21 is inserted and hooked in the reinforcement tools 18 and 20.
Are formed. In addition, the reinforcement 20 has a panel body 2
A pivotal support portion 20b that is hooked on the 2 is formed.

A suction port 22a and a blowout port 22b are formed in the panel body 22, and a female latch 23a into which a male latch described later is fitted is attached. Then, the blowout device 7 is screwed to the boss 22c so as to be continuous with the blowout port 22a. Further, the display device 13 is attached next to the blowing device 7. Further, the suction grille 16 is attached to the front side of the panel body 22.

In FIGS. 1 and 6, the crosspiece 16b is inclined toward the blower 4 side, and a gap between adjacent crosspieces is larger at the rear end of the suction side of the crosspiece 16b than in the rear end 50 of the conventional one. A cutout portion [recess] 16c is formed. Then, by forming the cutout portion 16c,
The side surface of the leeward end of 16c is recessed. Further, the cutout portion 16c is formed by a vertical portion 16d and a curved portion 16e that is smoothly continuous with the vertical portion. Further, 16f is a horizontal portion formed in the cutout portion 16c and is about 0.3 to 0.5 mm.
Because of this horizontal portion, burrs are less likely to occur during manufacturing with a mold.

The hooking tool 17 has a hooking piece 17a hooked on the panel body 22, and an inclined surface 17b for facilitating the ride over the hooking portion of the panel body 22 when the suction grill 16 is pushed toward the exterior body 1 side. A bar 16b of the suction grill 16 and a knob 17c having the same cross section are formed. Then, when this knob is pushed, the hooking piece 17a is detached from the panel body 22. Reference numeral 17d is a spring fitted in the hooking tool 17, and pushes the hooking piece 17a toward the hooking portion side of the panel body 22. Then, this spring is fitted into a groove (not shown) of the panel body 22 and fixed at a predetermined position. Reference numeral 17e is a shaft for passing the spring 17d, and 17f is a stopper for preventing the spring 17d from coming off from the shaft. And this hook 1
Since the male latches 23b are provided between 7 and both ends of the suction grill 16, after the hook 17 is hooked on the panel main body 22, the suction grill 1 corresponding to the position of the male latch 23b.
When the front side of 6 is pushed to the exterior body 1 side, the male latch 23b fits into the female latch 23a on the panel body 22 side.

FIGS. 5 to 9 show an air filter, 21c is an air filter frame, and 21d is an air filter net. This net is formed in a corrugated form and has a suction passage even if a large amount of dust adheres. There is no blockage. Reference numeral 21e is a fixing piece that hits the inside of the mountain portion of the net 21d to prevent the net from slipping, and this fixing piece has an inclined surface 21f for smoothly guiding air. Two
1g and 21h are the escape portions of the latch 23b and the hook 17,
Reference numeral 21i is a reinforcing portion of the net 21d. The reinforcing portion has a surface inclined toward the mountain portion, and this surface is smoothly continuous with the mountain portion.

In FIG. 10, reference numerals 22d and 22e are mating claws formed on the panel body 22 and are fitted in the blowout frame 12. Then, on the suction grill side (right side in the figure), the blow-out frame 12 and the panel body 22 are fixed by the screw 25. Further, on the end side, the reinforcing metal fitting 26, the blowing frame 12, and the panel body 22 are integrally tightened with the screw 27, so that these parts are more firmly fixed. 22 g is a flock provided at the outlet of the panel body 22.

The air conditioner thus constructed is assembled as follows. In assembling the decorative panel, first, the blowing device 7, the display device 13, and the suction grill 16 are separately assembled.

The blowing device 7 can be assembled by attaching the wind direction changing plates 8 and 9 and the motor 11 to the blowing frame 12. The display device 13 can be assembled by attaching the display substrate 15 to the attachment plate 14. Then, the suction grill 16 can be assembled by attaching the reinforcing tools 18, 19, 20 and the hooking tool 17, and further inserting the insertion portion 21a into the supporting portions of both reinforcing tools 18, 20 and attaching the air filter 21. .

When the display device 13, the blowing device 7, and the suction grill 16 are assembled to the panel body 22, the decorative panel 5 is formed.
Is assembled.

As described above, since the blowing device 7, the display device 13 and the suction grill 16 are formed separately from the panel body 22, the blowing frame 12 and the wind direction plate 8 of the blowing device 7,
9, the change of the shape of the display device 13, the increase and decrease of the display lamp of the display device 13, the change of the model and brand name to be displayed, the suction grill 16
Even when the number and shape of the crosspieces 16b are changed, it is only necessary to newly redesign the changed portion, so that a different decorative panel can be designed and manufactured with a minimum necessary change. Further, in the conventional one in which the panel body is sequentially assembled with the parts, there is a fear that the large panel body has to be moved on the line and may be soiled or damaged. In order to assemble the assembled display device 13, blowing device 7 and suction grill 16,
Assembling time can be shortened, and the risk that the decorative panel 5 is soiled or damaged can be reduced. In addition, since the blowing device 7, the display device 13, and the suction grill 16 of the decorative panel 5 are configured separately from the panel body 22, replacement at the time of failure only needs to be performed at the failure point, and therefore the cost at the time of failure The burden and replacement work can be reduced.

When the decorative panel 5 is attached to the lower part of the exterior body 1 installed in the ceiling space, the installation of the air conditioner is completed.

When the decorative panel 5 is attached to the lower portion of the outer casing 1, the suction grill has a slender shape made of resin and is formed thin, so that it is particularly easy to hang down.
However, since the metallic reinforcements 18, 19, 20 are attached to the back surface of the suction grill 16 of the decorative panel 5, the suction grill 1 is formed by these reinforcements 18, 19, 20.
Since the deformation and bending of 6 are suppressed, the suction grill 16 is prevented from hanging down as much as possible. Further, since the rotating side (reinforcing tool 18 side) of the suction grill 16 is stopped by the panel main body 22 by the hooking tools 17 at two locations and the male latches 23b at three locations, the suction grille 16 at the reinforcing tool 18 side. Is prevented from hanging under its own weight.

The suction grill 16 of this air conditioner
When the knob 17c is pushed toward the reinforcing member 18 to remove the hooking piece 17a from the panel body 22, and the front side of the suction grill 16 corresponding to the position of the male latch 23b is pushed to the exterior body 1, the suction grill 16 and the panel body 22 are pulled. Since the hook is removed, the suction grill 16 can be rotated.

Further, in this air conditioner, when the air conditioner is in operation, the air flows into the bar 16b of the suction grill 16 as shown in FIG.
Flowing through the gap. The air near the crosspiece 16bα close to the reinforcing member 18 is almost straight up as shown in FIG.
The air in the vicinity of β flows obliquely upward to the left, and the air in the vicinity of the reinforcement 20 flows obliquely upward in the left direction substantially along the inclined direction of the crosspiece 16bγ.

The air near the crosspiece 16bα has a small ventilation resistance because it passes through a gap [suction passage] L larger than the gap of the conventional lattice. Moreover, since the curved surface portion 16e of the crosspiece 16b is formed into a round shape, the air flowing along the vertical portion 16d easily separates from the curved surface portion 16e, and the air flow is less likely to be disturbed, so that the ventilation resistance is less likely to increase. Also, the crosspiece 16
Air around bβ has a larger gap than the conventional gap,
Since it passes through this large gap [suction passage], the ventilation resistance is small. Furthermore, the air near the crosspiece 16bγ is almost the same as the crosspiece 16b.
Since it flows along γ, the ventilation resistance is small. in this way,
Since the ventilation resistance of the intake air passing through the crosspieces 16bα, 16bβ, 16bγ can be reduced, the noise generated due to the ventilation resistance can also be reduced.

Incidentally, it was confirmed that the air conditioner equipped with the suction grill 16 reduced the noise by about 2.5 dB as compared with the air conditioner equipped with the conventional suction grill having the crosspieces 50.

Further, the air filter 21 also has a fixed piece 21.
Since e, etc. guide the intake air smoothly, the ventilation resistance is small,
The noise is also small.

[0025]

According to the present invention, since the side surface of the leeward side end of the crosspiece is recessed in the suction grill in which a large number of crosspieces are inclined in the same direction, the gap between adjacent crosspieces, that is, the suction Since the air ventilation path is large, the ventilation resistance of the suction air can be reduced. Moreover,
Since the ventilation resistance is small, the noise accompanying the ventilation resistance can also be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a lattice of a suction grill showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an air conditioner including the suction grill.

FIG. 3 is a perspective view showing a panel body of the air conditioner.

FIG. 4 is a perspective view showing a blowout grill and a display device of the air conditioner.

FIG. 5 is a perspective view showing a suction grill of the air conditioner.

FIG. 6 is a sectional view of a suction grill of the air conditioner.

FIG. 7 is a plan view showing an air filter of the air conditioner.

FIG. 8 shows an air filter of the air conditioner shown in FIG. 7.
It is a VIII-VIII sectional view taken on the line.

FIG. 9 is a sectional view taken along line IX-IX of the air filter of the air conditioner.

FIG. 10 is a main-portion cross-sectional view showing the vicinity of the blowing device of the air conditioner.

[Explanation of symbols]

 1 Exterior body 16 Suction grill 16b Crosspiece 16c Notch [Dimple]

Claims (1)

[Claims] 1. A suction grill in which a large number of crosspieces are inclined in the same direction, wherein a side surface of an end portion on the leeward side of the crosspiece is recessed.