JPH0742042Y2 - Ceiling embedded air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a ceiling-embedded air conditioner installed inside a ceiling, and more particularly to improvement of its blowout air passage.

[Conventional technology]

FIG. 8 is a sectional view of a conventional ceiling-embedded air conditioner shown in, for example, Japanese Utility Model Laid-Open No. 59-91512.
Is a ceiling, (2) is a box-shaped main body installed in the ceiling (1), (3) is a ceiling exposed panel provided under the main body (2), and (4) is this ceiling exposed panel ( 3) is a suction port, (5) is a filter provided near the suction port (4), (6) is a blower provided in the main body (2), and (7) is also the main body ( 2) A heat exchanger provided inside, (8) is a blow-out air passage for guiding air from the heat exchanger (7), and (9) is horizontally provided on the lower surface of the ceiling-embedded air conditioner. The air outlets (10a) and (10b) are two guide walls facing each other and forming a part of the air passage (8) near the air outlet (9), both of which are about 30 in the vertical direction.
° tilted. Reference numeral (11) is a louver provided between the guide walls (10a) and (10b).

FIG. 9 is an enlarged sectional view of the vicinity of the air outlet (9).

Next, the operation will be described. By operating the blower (6), the guide air is guided from the suction port (4) to the filter (5).
Flows into the main body (2) through the heat exchanger (7) and is heat-exchanged by the heat exchanger (7), and then passes through the blowout air passageway (8) to the air outlet (9).
The air is blown into the room again and the room temperature is adjusted.

The air is blown out by changing the direction of the louver (11).

[Problems to be solved by the invention]

In the conventional ceiling-embedded air conditioner as described above, the louver provided in the blowout air passage is good in terms of design because it does not project from the ceiling exposed panel, but its blowing direction changing ability is low, and Even if the outlet is inclined about 30 ° from the horizontal plane as in the conventional example, the blowing direction necessary to improve the comfort of the indoor environment (when heating, the blowing direction is 65 ° downward from the horizontal plane). There was a problem that it was difficult to obtain 75 °, and 10 ° to 20 ° downward from the horizontal plane during cooling.

The present invention has been made to solve such a problem, and provides a ceiling-embedded air conditioner capable of obtaining an air blowing direction necessary for improving the comfort of the indoor environment and reducing pressure loss at the air outlet. The purpose is to get.

[Means for solving problems]

In the ceiling-embedded air conditioner according to the present invention, one of the two facing guide walls forming the vicinity of the outlet of the outlet air passage is formed so that one of the guide walls has a shape in which a cross section has a partially continuous curved line. The air passage has a gradually reducing structure toward the outlet, the other guide wall has a substantially straight shape toward the outlet, and both guide walls are formed so as to be flush with the opening surface, and the louver and the guide wall are formed. It has a length to reach the other guide wall with parallel rotating shafts, and the cross-sectional shape is bulging on the side facing the one guide wall and linear arcuate on the side facing the other guide wall. The radius of curvature of the cross-sectional curve in the one guide wall is equal to or greater than the length of the louver.

[Action]

In this invention, one guide wall of the two guide walls forming the vicinity of the outlet of the outlet air passage has a partially curved cross section so that the outlet air passage has a gradually reducing structure toward the outlet, and the louver is provided. Has a rotation axis parallel to the guide wall and reaches the other guide wall, so that if the tip of the louver is directed toward the outlet, the air passing through both sides of the louver is almost When the louver is blown out in the vertical direction and the tip of the louver is directed toward the other guide wall, the air flowing along between the louver and the one guide wall is blown out in a direction substantially horizontal to the air outlet. A wide variable range of the blown air flow can be obtained.

[Example of device]

FIG. 1 is a cross-sectional view of a ceiling-embedded air conditioner showing an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the vicinity of the air outlet thereof, in which (1), (2), ( 4) to (9) are the same as the above-mentioned conventional example. (12a) and (12b) are two guide walls that are close to each other and that are close to the air outlet (9) of the blowout air passage (8) and that are made of hard rubber or plastic resin having good heat insulation performance. (12b) is formed in a flat shape. (13) is a blow-out portion forming the blow-out port (9) side of the guide wall (12a) and has an arc-shaped cross section, and the blow-out air passage (8) is directed toward the blow-out port (9) by this blow-out portion (13). The structure is gradually reduced. (14) is the guide wall (12
a) A louver that is provided between the guide walls (12a) and (12b) and is pivotally supported by a rotating shaft (15) that is parallel to (12b) and has a length l of 22 mm. Is the guide wall (12
It reaches the guide wall (12b) when it turns to the b) side and the angle with the horizontal direction becomes about 40 °. Further, as shown in FIG. 6, the cross section of the louver (14) has a bulge on the side facing the one guide wall and a linear arcuate shape on the side facing the other guide wall. The radius of curvature R of the arc of the cross section of the blowout portion (13) is 24
mm, and the rotation axis (15) of the louver (14) is located at the center of this section arc. (16) is a thin ceiling exposed panel.

In the ceiling-embedded air conditioner thus configured, for example, when the louver (14) is brought into contact with the guide wall (12b) side as shown by the broken line in FIG. The air flowing through the blowout air passage (8) flows along the blowout part (13) and the lower surface of the louver (15) and is blown out from the blowout port (9), and the blowout direction becomes a substantially horizontal direction (broken line arrow), It is possible to cool the room evenly without blowing cold air directly on the residents. When the louver (14) is directed toward the air outlet (9) as shown by the solid line in FIG. 2 during heating, air flows between both sides of the louver (14) and the guide walls (12a) (12b) before being blown out. , Its blowing direction is 65 ° to 75 ° below horizontal (solid arrow)
As a result, the room can be heated uniformly.

FIG. 3 is an observation diagram of the air flow during heating and cooling in the ceiling-embedded air conditioner of this embodiment by the tracer method (smoke of incense sticks), and as shown in this figure, during cooling (FIG. 3 (a)). )
Shows a good result that air is blown out substantially in the horizontal direction, and at the time of heating (FIG. 3 (b)), the air is blown out in the direction of 65 ° to 75 ° below the horizontal. FIG. 4 is an indoor temperature distribution diagram of the ceiling-embedded air conditioner during heating. The solid line represents the embodiment of the present invention and the broken line represents the conventional example, respectively. According to the method, a good indoor environment with a constant temperature distribution regardless of the height above the floor can be obtained.

Further, FIG. 5 shows the air outlet (9) when the radius of curvature of the air outlet (13) is changed while arranging so that the air outlets (9) always have the same size in the above embodiment. It is a characteristic diagram showing a change in pressure loss, the horizontal axis is (radius of curvature R)
/ (Louver length 1). In this invention, since the radius of curvature R is equal to or longer than the length 1 of the louver, the pressure loss is reduced during both cooling and heating as shown in FIG.

FIG. 6 shows a cross section of the louver (14) of the present invention. The louver (14) has a bow-shaped cross section in which the surface facing the guide wall (12a) is inflated. In the case of the louver having the bow-shaped cross section, when the air is blown downward during heating, the collision of the air flowing on both sides of the louver (14) does not become large, and the turbulence of the air flow is small, so that the air outlet (9 The pressure loss at) is further reduced. FIG. 7 is a characteristic diagram showing the pressure loss of the air outlet with respect to the angle of the louver when the length of the louver (14) is fixed to 22 mm and the shape is changed in the above embodiment, and the solid line shows the cross section bow. When a louver having a shape is used, a broken line shows a case where a louver having an airfoil shape is used. As shown in this figure, the angle of the louver (14) is around 50 °, that is, the pressure loss is about the same when the air is blown out in the horizontal direction, but it is shown by the solid line as the angle of the louver (14) increases. The bow-shaped cross section has less pressure loss.

Further, in the above-mentioned embodiment, the blow-out portion (13) has a shape of an arc in cross section, but the blow-out portion (13a) has a curved cross section, and the blow-out air passage (8) is directed toward the blow-out port (9). The same effect can be obtained as long as it has a gradually reducing structure.

Further, in the above-mentioned embodiment, when the louver (14) reaches the guide wall (12b), the angle formed by the louver (14) and the horizontal direction is 40 °, but this angle may be 0 °. Is. However, this angle is preferably 35 ° to 45 ° for the most effective blowing direction changeability.

[Effect of device]

As described above, according to the present invention, of the two guide walls forming the vicinity of the outlet of the outlet air duct, one of the guide walls has a shape in which the cross section has a partially continuous curved line, and the outlet air passage is blown. While having a gradually reducing structure toward the outlet, the louver has a rotation axis that is parallel to the guide wall and reaches the other guide wall, and the cross-sectional shape bulges on the side facing the one guide wall, The side opposite to the other guide wall has a straight arcuate shape and the radius of curvature of the cross-sectional curve in the one guide wall is set to be equal to or longer than the length of the louver, so that a wide variable range in the air blowing direction can be obtained and the air outlet Pressure loss,
In particular, there is an effect that it is reduced as the angle at which the air flow is blown downward increases.

[Brief description of drawings]

FIG. 1 is a sectional view of a ceiling-embedded air conditioner showing an embodiment of the present invention, and FIG. 2 is a sectional view near the air outlet in FIG.
3 (a) and 3 (b) are observation views of the blown air flow during cooling and heating,
Fig. 4 is an indoor temperature distribution diagram of a ceiling-embedded air conditioner during heating, Fig. 5 is a characteristic diagram of pressure loss at the air outlet depending on the ratio of the radius of curvature and louver length, and Fig. 6 is the louver of the present invention. FIG. 7 is a sectional view of the vicinity of the outlet for showing the shape, FIG. 7 is a characteristic diagram showing the difference in pressure loss of the outlet due to the louver shape,
FIG. 8 is a cross-sectional view of a conventional ceiling-embedded air conditioner, and FIG. 9 is a cross-sectional view near the outlet. In the figure, (2) is a main body, (4) is a blow port, (6) is a blower, (7) is a heat exchanger, (8) is a blowout air passage, and (9).
Is an outlet, (12a) and (12b) are guide walls, (13) is an outlet,
(14) is a louver and (15) is a rotating shaft. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A main body having a heat exchanger and a blower, which is installed in a ceiling, an air outlet provided on the lower surface of the main body, and an air outlet for introducing air from the heat exchanger to the outlet. In a ceiling-embedded air conditioner comprising two opposing guide walls that constitute the vicinity of the outlet of the outlet air passage and a louver provided between the guide walls to change the outlet air flow direction, One of them has a shape in which a cross section has a partially continuous curve, and the blowout air passage has a gradually reducing structure toward the outlet, and the other guide wall has a substantially linear shape toward the outlet, and both guide walls are The tip of the louver is formed so as to be flush with the opening surface, and the louver has a rotation axis that is parallel to the guide wall, and has a length that reaches the other guide wall by rotating, and the cross-sectional shape is The side opposite the one guide wall bulges, and the other guide wall Against the side is a linear arcuate shape, further ceiling type air conditioner, characterized in that the radius of curvature of the profile curve in one of the guide wall above was more than the length of the louver.