JPH0443178B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air blowing control device for an air conditioner that controls the direction of air blowing from an air outlet using the Coanda effect.

BACKGROUND ART Conventionally, an air conditioner having a configuration for controlling ventilation in a ventilation circuit by opening and closing a damper has been known, for example, from Japanese Utility Model Publication No. 57-53301.

Problems to be Solved by the Invention However, with this configuration, the air is forced to collide with the air deflection plate, changing the air direction, resulting in large noise, an insufficient maximum deflection angle, and a problem with comfort. Ta.

Furthermore, in the closed operation state of the damper, since sealing performance must be ensured, a sufficient contact area with the ventilation circuit wall surface must be ensured, and the configuration for this purpose becomes complicated.

The present invention solves the above-mentioned problems, and makes it possible to efficiently change the direction of air blowing by generating the colander phenomenon, and also has a structure for this purpose that also serves as a structure for ensuring the sealing performance of the damper. This is intended to simplify the configuration.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a stepped portion that attracts air from the blower on opposing side walls near the outlet in the ventilation circuit of an air conditioner. The side wall of the air outlet is formed to gradually widen from the step in the air blowing direction, and a damper is rotatably provided between the step and the air outlet, the damper having both ends abutting the step. .

Effect: With this means, a Coanda phenomenon occurs at the stepped portion when the damper is opened, and acts to spread the air. . As a result, the angle at which the air blowing direction can be changed can be increased.
Moreover, it generates less noise. Furthermore, when the damper is closed, the end of the damper comes into contact with the stepped portion, so sealing performance can be ensured and the stepped portion can be used effectively.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

First, the schematic structure of the air conditioner will be explained with reference to FIGS. 2 and 3.

In the figure, 1 is the main body of the air conditioner, which has a suction port 2 in the center on the front and a lower air outlet 3 at the bottom.
A front grill 4 having a diameter is attached. Reference numeral 5 denotes an upper air outlet provided at the upper part of the air conditioner main body 1. 6 is a ventilation circuit formed inside the air conditioner main body 1, which includes a heat exchanger 7, a blower 8,
A blowout grill 9 which also serves as a water tray for the heat exchanger 7 is provided. Reference numeral 10 denotes a rotatable damper that closes the outlet grille 9, and is driven by a motor (not shown).

Next, the configuration of the damper 10 section will be explained with reference to FIGS. 1 and 4.

The outlet grille 9 in the ventilation circuit 6 has a side wall 9a that is curved so as to gradually widen toward the lower outlet 3.
It has a stepped portion 11 at the minimum width portion. Both ends of the damper 10 come into contact with the stepped portion 11 when the damper 10 is closed, thereby ensuring sealing performance at that time. In addition,
Reference numeral 12 designates a plurality of left-right wind direction changing blades provided between the front grille 4 and the blow-off grille 9, each of which has a curved shape so that air is smoothly branched left and right.

In the above configuration, when the damper 10 is opened, the wind flows through the outlet grille 9 as shown by arrow A in FIG. However, negative pressure is generated in the stepped portion 11, and a Coanda phenomenon occurs. As a result, the wind is attracted toward the side wall 9a and is blown out while spreading. The left and right wind direction changing blades 12 facilitate this effect and increase the changing angle.

On the other hand, when the damper 10 is closed, both ends of the damper 10 abut against the stepped portion 11, as shown by the two-dot chain line in FIG. As a result, sealing performance is ensured by the surface contact.

Effects of the Invention As described above, in the present invention, the stepped portion that causes the Coanda phenomenon is also used as a structure to ensure sealing performance when the damper is closed. It is possible to ensure sealing performance in the event of blockage, and the functional quality of the air conditioner is improved.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of a damper section of an air conditioner according to an embodiment of the present invention, FIG. 2 is a perspective view of the air conditioner, and FIG. 3 is a partially cutaway side view of the air conditioner. FIG. 4 is a plan sectional view of the lower outlet portion of the air conditioner. 1...Air conditioner body, 2...Suction port, 3...
Lower air outlet, 6... Ventilation circuit, 8... Blower, 9
a... Side wall, 10... Damper, 11... Step portion.

Claims (1)

[Claims] 1. A ventilation circuit communicating with the suction port and a blower located within the ventilation circuit are provided in an air conditioner main body having an inlet and an air outlet, and further, on opposing side walls near the air outlet in the ventilation circuit,
A step is provided to attract air from the blower, and the side wall of the outlet is formed to gradually expand from the step in the air blowing direction, and between the step and the outlet, both ends are connected to the step. A blower control device for an air conditioner that has a rotatable damper that comes into contact with it.