JPH0131881Y2 - - 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 a blower using a cross-flow fan, and Fig. 2 is a structural diagram of a conventional blower using cross-flow fan 1. In the blower device, the wind speed distribution at the outlet 2 has a distribution as shown by the solid line A in FIG. There is.

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, 7 is a casing.
The casing 7 consists of an arcuate surface portion 8 disposed on the outside, and a stabilizer 3 arranged on the inside and bent in the same direction as the arcuate surface portion 8. 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 airflow discharged from the crossflow fan 1 passes through the outlet flow path 5 to generate a blowout wind.

The cross flow fan 1 is provided in front of the bent portion of the stabilizer 3 in the outlet flow path 5, and is provided in the arcuate surface portion 8.
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 6 denotes a wind direction adjustment plate provided at the outlet 2 at the outlet end portion of the outlet flow path 5 where the high speed region B exists.
This wind direction adjusting plate 6 is connected to the air outlet 2 at the outlet end portion.
By linear protrusion and retraction in the direction intersecting the air blowing direction at By adjusting the protrusion amount l of the wind direction adjusting plate 6 as described above, the airflow blowing angle θ ₂ can be adjusted by the so-called Coanda effect, in which the blowing air follows the wind direction adjusting plate 6. There is.

That is, since the high-speed region B of the blowout flow exists on the side where the wind direction adjustment plate 6 is provided, when the wind direction adjustment plate 6 protrudes in the direction crossing the blowing direction as shown by the dotted line, the air Due to the Coanda effect in which the high-speed region B of the flow contacts the wind direction adjusting plate 6 in that direction, and as a result the air flow adheres to (follows) the adjacent wall, the direction of the blowing air is changed by an angle of θ ₂ . It will be changed. 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 6 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 6 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 2 without considering the wind speed distribution, the pressure loss is small, the air volume is large, and the wind direction can be changed with low noise.

In addition, as shown by the dotted line, when the protrusion amount of the wind direction adjustment plate 6 is 0, the air blows out in the direction along the wall surface due to the Coanda effect along the wall surface of the stabilizer 3 of the air outlet flow path 5. However, since there are no obstructions to the blowout airflow in the blowout outlet channel 5, it is possible to change the wind direction with lower pressure loss, larger air volume, and lower noise, especially compared to the conventional method.

FIG. 4 shows the relationship between the protrusion amount l of the wind direction adjusting plate 6 and the airflow blowing angle θ ₂ from the horizontal line. As can be seen from this figure, the protrusion amount l
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.

<Effects> As described above, the present invention consists of an arcuate surface portion placed on the outside and a stabilizer placed inside and bent in the same direction as the arcuate surface portion. A J-shaped air outlet flow path is formed, with the outlet end being the air outlet and the entire area being approximately J-shaped.
A casing formed in a letter shape is provided, and a cross flow fan that rotates in a direction from the arcuate surface portion side toward the stabilizer side is provided on the front side of the bent portion of the stabilizer in the outlet flow path, and the above-mentioned In devices that blow air from the outlet at the outlet end of the outlet flow path, the air outlet at the outlet end of the outlet flow path where a high-speed region exists is caused by linear protrusion and retrieval in a direction that intersects with the air blowing direction in that part. This is a blower device that is provided with a wind direction adjustment plate that adjusts the protrusion amount l.

Therefore, by changing the protrusion amount l of this wind direction adjustment 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.

[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: Cross flow fan, 2: Air outlet, 3: Stabilizer, 5: Air outlet channel, 6: Wind direction adjustment plate,
7: Casing.

Claims (1)

[Claims for Utility Model Registration] Consisting 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, there is approximately a portion between the arcuate surface portion and the stabilizer. A J-shaped outlet flow path is formed, and a casing is provided which is formed approximately in a J-shape as a whole with the outlet end as an outlet, and the above-mentioned In the case where a cross-flow fan is provided that rotates in a direction from the arcuate surface portion side toward the stabilizer side and blows air from the outlet at the outlet end of the outlet channel, the outlet of the outlet channel where a high-speed region exists. A blower device comprising a wind direction adjusting plate that adjusts the protrusion amount l by linear protrusion and retraction in a direction intersecting the blowing direction at the end portion of the blower outlet.