JPH0395350A - Air flow deflector of air conditioner - Google Patents

Abstract

PURPOSE:To prevent the air flow from decreasing even when a louver is moved so as to let the air blow in the downward direction, by a method wherein the louver has a wing shape cross section with a large upward warp, and a shoulder, that has a larger thickness on the downstream side than on the upstream side, is formed on the upper or rear face. CONSTITUTION:A louver 7 is formed into a wing shape having a large warp projecting upward, and a shoulder 8, which has a larger thickness on the downstream side than on the upstream side, is provided on the upstream side of the middle part of the upper face in the longitudinal direction. In heating operation, the louver 7 is turned downward. When the air passes through the louver 7, air mainly flows along the rare face of the louver 7, that has a large warp, and flows downward. Thus, downward air blow becomes practical without an increase in resistance, so that an decrease in the air flow and an increase in noise can be prevented. In cooling operation, the louver 7 is turned upward so that the air tends to flow horizontally since the air stream leaves from the louver 7 due to the provision of the shoulder 8 having a larger thickness on the downstream side than on the upstream side.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air deflection device for an indoor unit of an air conditioner, particularly a wall-mounted indoor unit.

2. Description of the Related Art In general, a conventional wind deflection device for an air conditioner has a structure as shown in FIG.

That is, in the figure, 1 is the main body of the indoor unit, which has an inlet 2 on the front and an outlet 3 from the lower part of the front to the bottom. 4 is a ventilation passage formed in the indoor unit main body 1, which communicates with the inlet port 2 and the outlet port 3;
A heat exchanger 5 and a crossflow fan 6, which constitute a refrigeration cycle, are disposed inside. A louver 7 is shaped like a plate, and both ends of the louver are rotatably fixed to the outlet 3 via a shaft or the like.

The air sucked in from the suction port 2 by the cross-flow fan 6 passes through the heat exchanger 5, exchanges heat with the refrigerant, and passes through the gap of the looper 7 provided on the downstream side of the cross-flow fan 6 to the air outlet. It is blown out from 3. At this time, the original blowing direction of the blower is slightly downward from horizontal, so in order to further improve the comfort of air conditioning, for example, the looper is set so that the temperature when heating is blown downward, and the air when cooling is blown upward. It was supposed to change the direction of air blowing by rotating 7. In addition, during heating, it is necessary to blow air downward to remove floating warm air and to blow air at high wind speed.

Problems to be Solved by the Invention However, in the above-mentioned configuration, when the blowing direction is set downward during heating, the resistance of the louver increases.
As the air volume decreases, so does the noise, which, combined with the need for a high wind speed especially during heating, poses a problem in that the noise increases.

The present invention solves these problems, and aims to provide an indoor unit in which the air volume does not decrease even when the blowing direction of the louver is directed downward.

Means for Solving the Problems In order to solve the above problems, the wind direction deflection device of the present invention has the cross section of the louver that deflects the wind direction of the blowout by its rotation shaped like an airfoil with a large convex warp on the upper side. , a stepped portion is provided on at least one of the upper surface and the lower surface of the louver so that the thickness is thicker on the downstream side than on the upstream side.

Operation The present invention has the above-mentioned configuration. During cooling, the louver is directed to blow out cold air in a horizontal direction that almost matches the original blowing direction of the blower, and during cooling, the louver with a large warp is directed downward to minimize the increase in resistance. Since the blowing direction of hot air is directed downwards, a decrease in air volume and an increase in U noise can be avoided.As a result, the reach of hot air to the floor is increased, and the temperature distribution in the air-conditioned room is improved. can be improved.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In Figure 1, l is the main body of the indoor unit, with an inlet 2 and an outlet 3 on the front. Reference numeral 4 denotes a ventilation passage formed in the indoor unit main body 1, which communicates with the suction port 2 and the air outlet 3, and inside thereof a heat exchanger 5 and a cross flow fan 6 constituting a refrigeration cycle are arranged. It is set up. These are similar to existing air conditioners, and include a water tray that also serves as an air guide for the cross flow fan 6, and an air filter. Front grill. A fan motor (not shown) is also provided as is well known.

7 shows the details in Figure 2. As shown in Figure 3, this louver has a cross section shaped like an airfoil with a large convex curvature, and is arranged so that it can rotate vertically across the width of the air outlet 3. Further, on the upper surface of the looper 7, a stepped portion 8 is formed in the longitudinal direction upstream from the center thereof and is thicker on the downstream side than on the upstream side. Both ends of the looper 7 are attached to approximately the center of the air outlet 3 via a rotating shaft. Then, the air sucked from the suction port 2 by the crossflow fan 6 passes through the heat exchanger 5,
The air is blown out from the air outlet 3 through a gap in the looper 7 provided on the downstream side of the cross flow fan 6.

In the above structure, when operating this indoor unit for heating,
As shown in FIG. 2, rotate the looper 7 so that it faces downward. Then, the air sucked in from the suction port 2 is converted into warm air by the heat exchanger 5, and then heated by the cross flow fan 6.
The air passes through the ventilation path 4 and is blown out from the air outlet 3 via the looper 7. At this time, the main stream of the air passing through the looper 7 flows along the curved lower surface of the looper 7 and heads downward, allowing downward blowing without increasing resistance, resulting in a decrease in air volume. This can prevent noise from increasing.

In addition, when performing cooling operation, rotate the louher 7 upward as shown in Figure 3 to blow out cold air horizontally in a horizontal direction that is almost the same as the original blowing direction of the blower. Because the air reaches the lower part sufficiently through natural convection, it is not necessary to use the same high flow velocity and air volume as when heating. moreover,
Since there is a stepped portion 8 on the upper surface side of the looper 7 that is thicker on the downstream side than on the upstream side, the airflow separates and tends to flow in the horizontal direction.

FIG. 4 shows a louver according to the present invention in which the size of the warp is 10% of the chord length, the maximum position of the warp is 60% of the chord length from the front end, and the position of the stepped portion 8 is 30% of the chord length from the front end. This is the result of an experiment comparing the blowout angle and air volume characteristics of conventional louvers. It can be seen that the wind direction deflection device according to the present invention can clearly increase the air volume during downward blowing compared to the conventional one.

In the above-mentioned embodiment, a stepped portion is provided on the upper surface of the looper 7 as an example, but it may be provided on either the upper or lower surface, or on both sides. An example of this is shown in FIG. show. Further, the step portion may be divided in the longitudinal direction (span direction) of the looper 7, or the present invention may be applied to a louver in which several blades are provided and interlocked. Examples are shown in FIGS. 6 and 7.

Effects of the Invention As described above, according to the wind direction deflection device of the present invention, when blowing out horizontally during cooling, the step part provided in the louver separates the airflow and makes it easier to direct the airflow horizontally, and when blowing hot air during heating. When the direction is set downward, the louver with a large warp is directed downward, and the direction of hot air blowing is directed downward without increasing resistance, resulting in a decrease in air volume. An increase in noise can be avoided, and as a result, the reach of hot air to the floor is increased, resulting in an air conditioner that can even out the temperature distribution within the air-conditioned room.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an air conditioner equipped with a wind direction deflection device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the air outlet portion of the air conditioner during heating, and FIG. Fig. 4 is an enlarged sectional view of the air outlet section of the air conditioner during cooling, and Fig. 5 is a graph of the air flow angle versus air volume characteristic of the same air conditioner and a conventional air conditioner. Figure 6. FIG. 7 is a perspective view of a wind direction deflection device according to another embodiment of the present invention, and FIG. 8 is a sectional view of an air conditioner showing a conventional example. 1... Indoor unit main body, 3... Air outlet, 7... Louver +, 3... Step portion.

Claims (1)

[Claims] A louver is provided at the air outlet of the air conditioner, and the louver deflects the direction of the air by its rotation, and the cross section of the louver is shaped like an airfoil with a large curvature convex to the upper side, and at least one of the upper surface and the lower surface of the louver is provided. A wind deflection device for an air conditioner that has a stepped portion that is thicker on the downstream side than on the upstream side.