JPH0131882Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an air blower, and particularly relates to an improvement in its air direction adjustment mechanism.

<Prior Art> In general, blowing devices in air conditioners, hot air heaters, etc. are often equipped with a wind direction adjustment mechanism for adjusting the wind direction.

Conventionally, the above-mentioned wind direction adjustment mechanism is equipped with a wind direction adjustment plate, generally called a louver, attached to the outlet of the blower, and the wind direction is adjusted by changing the angle of this louver. .

By the way, Fig. 1 is a structural diagram for explaining the wind speed distribution in the outlet flow path of an air blower using a cross flow fan, Fig. 2 is a structural diagram of a conventional air blower, and Fig. 3 is an air blower according to the present invention. This is a structural diagram of the device, and in the blower device using the cross flow fan 1, the wind speed distribution at the outlet 2 is the first.
It exhibits a distribution as shown by solid line A in the figure, and the stabilizer 3 (or the side wall of the air outlet 2)
High speed range B exists near the area.

However, conventionally, the above wind speed distribution was ignored and the second
As shown in the figure, a plate 4 called a horizontal louver (hereinafter referred to as a louver) for adjusting the wind direction in the vertical direction is provided in the outlet flow path 5, and by changing the angle θ ₁ of this louver 4, the wind direction can be adjusted up or down. I was adjusting.

However, with such a structure, the wind speed distribution is ignored. In other words, even though there is a high velocity part on the upper wall side of the outlet flow path 5, the louver 4 located in the center of the passage 5 In order to adjust the wind direction, it is necessary to arrange a plurality of relatively large louvers 4, and as a result, even if the angle of the louvers 4 is adjusted to the angle that provides the least resistance to the blowing wind, the thickness of the louvers 4 is too large. Therefore, there was a problem in that there was a very large resistance to the blowing air, resulting in a significant decrease in air volume.

In addition, since the louver 4 is arranged ignoring the wind speed distribution, when the angle of the louver 4 is changed to adjust the wind direction, the louver 4 becomes more likely to become an obstruction to the blowing wind, and the air volume decreases significantly. There was a problem.

<Purpose> In view of the above points, the present invention aims to solve the above-mentioned conventional problems by adjusting the wind direction by utilizing the so-called Coanda effect in which jets (airflows) adhere to adjacent walls.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

It should be noted that the same parts as those in the prior art will be given the same reference numerals and the explanation will be omitted.

FIG. 3 is a structural diagram of an embodiment of the present invention.

In this FIG. 3, 8 is a casing.
This casing 8 consists of an arcuate surface portion 9 arranged on the outside and a stabilizer 3 arranged inside and bent in the same direction as the arcuate surface portion 9. A substantially J-shaped outlet flow path 5 is formed between them, and the outlet end serves as the outlet 2, and the entire structure is formed in a J-shape.
The air outlet flow path 5 generates a blow-out air by passing the air flow discharged from the cross-flow fan 1.

The cross flow fan 1 is provided on the front side of the bent portion of the stabilizer 3 in the outlet flow path 5, and is provided in the arcuate surface portion 9.
The air outlet 2 rotates in a direction toward the stabilizer 3 (clockwise in FIG. 3), and air is blown from the outlet 2 at the outlet end of the outlet flow path 5.

Reference numeral 7 denotes a rotatable wind direction adjusting plate provided at the outlet 2 at the outlet end portion of the outlet flow path 5 where the high speed region B exists. The wind direction adjusting plate 7 has an arcuate side on the side that contacts the wall surface 6a which is recessed in an arc shape on the wall surface 6 on the stabilizer side, and a linear surface on the side that comes into contact with the blowing air. It is rotatably supported around a rotating shaft through which an imaginary axis O passes through the outlet flow path 5 .

The arc-shaped concave portion of the wall surface 6a is formed into a concave portion having a shape corresponding to the cross section of the wind direction adjustment plate 7, and is formed into a linear surface that comes into contact with the blowing air of the wind direction adjustment plate 7, as shown by the dotted line. When it is rotated in the direction along the blowing wind, the linear surface becomes flush with the wall surface 6, and the wind direction adjusting plate 7 fits into the recess and is completely submerged.

Therefore, as the wind direction adjustment plate 7 rotates about the rotation axis, its protrusion amount s changes from the zero state where the straight surface is flush with the wall surface 6 and is completely submerged, to the second state. The wind direction adjusting plate 7 protrudes by an amount s in the direction intersecting the air blowing direction at the outlet end. In the protruding state, the airflow follows the wind direction adjusting plate 7, which is the so-called Coanda effect, so that the airflow blows out downward at an airflow blowing angle θ ₂ .

That is, since the high-speed region B of the blowout flow exists on the side where the wind direction adjustment plate 7 is provided, when the wind direction adjustment plate 7 protrudes in the direction crossing the blowing direction as shown in the figure, the air Due to the Coanda effect, in which the flow (especially in the high-speed region B) comes into contact with the wind direction adjusting plate 7 in the relevant direction, and as a result, the air flow adheres to (follows) the adjacent wall, the blowing direction of the blowing air changes at an angle of θ ₂
It will be changed by that amount.

FIG. 4 shows the relationship between the protrusion amount s of the wind direction adjustment plate 7 and the airflow blowing angle θ ₂ from the horizontal line. As can be seen from this FIG.
As this increases, the airflow blowing angle θ ₂ increases, that is, the blowing airflow is adjusted in a downward direction as shown in FIG. The air flow blown out at this angle θ ₂ has a substantially uniform wind speed distribution.

In this way, if the wind direction is changed by the Coanda effect by the wind direction adjustment plate 7 in the above-mentioned part where the high speed region B exists, the wind direction can be changed greatly and efficiently even with the small wind direction adjustment plate 7 as shown in the figure, which is different from the conventional method. Compared to the case where a large louver is placed in the center of the outlet without considering the wind speed distribution, the pressure loss is smaller, the air volume is larger, and the wind direction can be changed with less noise.

In particular, when the wind direction adjustment plate 7 is completely submerged and the protrusion amount s is 0, the air is blown in the direction along the wall surface due to the Coanda effect along the wall surface of the stabilizer 3 of the outlet flow path 5. However, since there are no obstructions to the blowout airflow in the blowout outlet flow path 5, it is particularly noticeable that compared to the conventional method, pressure loss is small, air volume is large, and wind direction can be changed with low noise. .

Further, in the above embodiment, the wind direction adjustment plate 7 is
Since the protrusion amount s is changed by rotation,
As the surface that comes into contact with the blown air rotates, the angle with the wall surface 6, that is, the angle at which it intersects with the direction of the air blowing along the wall surface 6, gradually increases. Therefore, as the protrusion amount s of the wind direction adjusting plate 7 increases, the angle at which the wind direction adjusting plate intersects with the blowing direction gradually increases, thereby increasing the airflow blowing angle _θ2 . Even if the adjustment plate 7 is made to protrude, the wind direction can be changed smoothly.

<Effects> As described above, the present invention consists of an arcuate surface portion arranged on the outside and a stabilizer arranged on the inside and bent in the same direction as the arcuate surface portion, and between the arcuate surface portion and the stabilizer. A substantially J-shaped outlet flow path is formed, and a casing is provided whose entire body is approximately J-shaped with the outlet end as the outlet, and in front of the bent portion of the stabilizer in this outlet flow path, A cross-flow fan rotating in a direction from the arcuate surface portion side toward the stabilizer side is provided to blow air from the outlet at the outlet end of the outlet flow path, in which the air outlet flow path has a high-speed region. A wind direction adjustment plate is installed at the outlet at the outlet end portion, and rotates around a rotating shaft whose virtual axis passes through the outlet flow path, and adjusts its protrusion amount s so that it can move in and out in a direction intersecting the air blowing direction at the outlet. This is a blower device that is provided with a blower.

Therefore, by changing the protrusion amount s of this wind direction adjusting plate, the wind direction can be efficiently changed in accordance with the wind speed distribution by utilizing the Coanda effect. Therefore, compared to the conventional structure in which louvers are installed that ignore the wind speed distribution, there is less pressure loss, less decrease in air volume, and it is possible to adjust the wind direction with less noise.

Particularly in the case of the present invention, the wind direction adjustment plate changes its protrusion amount s by rotation. Therefore, as the protrusion amount s of the wind direction adjustment plate increases due to rotation, the angle at which the surface that contacts the blowing air intersects with the blowing direction gradually increases, so that the airflow passing through the blowout outlet flow path is suddenly increased. The wind direction can be changed smoothly by rotating the wind direction adjustment plate without having to change the wind direction. Therefore, by changing the protrusion amount s due to the rotation of the wind direction adjustment plate, the wind direction can be changed with low noise without reducing the amount of air blown.

[Brief explanation of the drawing]

Figure 1 is a structural diagram for explaining the wind speed distribution in the outlet flow path of a blower using a cross-flow fan, Figure 2 is a structural diagram of a conventional blower, and Figure 3 is a structural diagram of a conventional blower.
FIG. 4 is a structural diagram of a blower device according to the present invention, and FIG. 4 is an explanatory diagram of changes in wind direction according to an embodiment of the present invention. 1: Crossflow fan, 2: Air outlet, 3: Stabilizer, 5: Air outlet flow path, 6: Air outlet flow path wall, 7: Wind direction adjustment plate, 8: Casing.

Claims (1)

[Claims for Utility Model Registration] Consisting of an arcuate surface portion arranged on the outside and a stabilizer arranged inside and bent in the same direction as the arcuate surface portion, and between the arcuate surface portion and the stabilizer. Forming a nearly J-shaped outlet flow path,
A casing having a generally J-shape as a whole is provided with the outlet end as the outlet, and a casing is provided on the front side of the bent part of the stabilizer in the outlet flow path in a direction from the arcuate surface part side to the stabilizer side. In a device that is equipped with a rotating crossflow fan and blows air from the outlet at the outlet end of the outlet flow path, the blower outlet at the outlet end of the outlet flow path where the high-speed region exists is placed in the outlet flow path. An air blowing device comprising a wind direction adjustment plate that rotates around a rotation axis through which a virtual axis passes, and adjusts its protrusion amount s so as to be able to come out and go in a direction intersecting the air blowing direction at the relevant part.