JP2024051930A - Air intake grill - Google Patents

Abstract

[Problem] To provide an air supply grille that can reduce the temperature difference between above and below a room and improve the comfort of occupants by setting the supply air flow in the optimal blowing direction while maintaining the aesthetic appearance of the installation space. [Solution] An air supply grille is provided that includes an outdoor opening for supplying air from the outside of the room and a main body having a fixing surface for fixing to a ceiling surface, an indoor opening for blowing out the air supplied from the outdoor opening approximately parallel to the fixing surface, a rectangular panel portion attached vertically below the main body portion, and a mounting portion to which the panel portion can be attached in four patterns arranged at 90 degree intervals around the periphery of the main body portion, and the indoor opening has four different blowing directions for each of the four patterns, with the four directions falling within a range of 90 degrees, by mounting the main body portion and the panel portion via the mounting portion. [Selected Figure] Figure 6

Description

The present invention relates to an air intake grill.

A conventional air intake grill will be described with reference to FIG. 14. Conventionally, an air intake grill 206 is known in which a duct drawn from another space is connected to a duct connection port 202, and conditioned air 201 generated by an air conditioner installed in the other space is transported (see, for example, Patent Document 1).

The air supply grille 206 blows the conditioned air 201 sent through the duct out of four air outlets 203 (two in the figure) provided along the ceiling surface 204 in a crisscross direction within the room, i.e., in all four directions, as an air supply flow 205 along the ceiling surface 204.

Since such a conventional air intake grille 206 blows out the conditioned air 201 along the ceiling surface 204, the intake air flow 205 of the conditioned air 201 is not directly directed at the occupants. This has the advantage of preventing the occupants from becoming cold or dry due to being directly exposed to the air flow, thereby reducing discomfort to the occupants. Furthermore, since this air intake grille 206 is formed in a rectangular shape, it can be installed so that the outer periphery of the air intake grille 206 is parallel to the wall surface of the installation space, which has the advantage of not spoiling the aesthetics of the installation space.

JP 2009-63211 A

When there is a temperature difference between the inside and outside of the room, for example in winter, the inside of the room where the conditioned air is supplied by the air supply grill forms a high-temperature area that is generally comfortable for the occupants, but low-temperature areas form in some areas (for example around the windows). This is because the heat balance between the inside and outside of the room is large in places with low insulation such as around the windows, and the outdoor temperature affects the temperature inside the room. It is also known that the density of air is correlated with temperature, and the lower the temperature, the greater the density. In other words, the low-temperature air formed around the window flows below the window because of its high density and spreads throughout the entire lower part of the room. As a result, even though conditioned air is being supplied to the room, the temperature at the bottom of the room is low, and the temperature difference between the top and bottom of the room becomes large. This has caused a problem of reduced comfort for the occupants.

To solve this problem, it is effective to blow conditioned air toward windows with a large heat balance, and transport the high-temperature conditioned air to the low-temperature area formed around the window. This reduces the flow of low-temperature air downwards in the room, and suppresses the occurrence of temperature differences between the top and bottom of the room.

On the other hand, the position of windows in a room varies depending on the layout of the room. In other words, in order to blow conditioned air from the air intake grille toward the window, it is necessary to adjust the blowing direction of the air intake grille depending on the construction environment, such as the window placement.

However, with conventional rectangular air intake grilles, if the periphery of the air intake grill is installed parallel to the wall of the installation space for aesthetic reasons, the air outlet direction will also be parallel to the wall, and depending on the layout of the room, it may not be possible to blow air towards the area around the window.

The present invention aims to solve the above-mentioned problems of the conventional system and provide an air intake grille that can improve the comfort of occupants while maintaining the aesthetic appearance of the installation space, even in a variety of layout environments.

To achieve this objective, the air intake grille of the present invention comprises a main body having an outdoor opening for supplying air from the outdoor side and a fixing surface for fixing to the ceiling surface, an indoor opening for blowing out the air supplied from the outdoor opening approximately parallel to the fixing surface, a rectangular panel portion attached vertically below the main body portion, and a mounting portion to which the panel portion can be attached in four patterns arranged at 90 degree intervals around the periphery of the main body portion, and the indoor opening has a relationship in which the four directions of blowing out are different for each of the four patterns by attaching the main body portion and the panel portion via the mounting portion, and the four directions are within a 90 degree range. This achieves the intended objective.

The objective of the present invention is to provide an air intake grill that can improve the comfort of occupants while maintaining the aesthetic appearance of the installation space, even in a variety of layout environments.

FIG. 1 is a bottom perspective view of an air intake grill according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view of the air intake grill. FIG. 3 is a bottom perspective view of a main body that constitutes the air intake grill. FIG. 4 is a top perspective view of a panel portion that constitutes the air intake grille. FIG. 5 is a top view showing an example of the blowing direction of the intake air flow of the intake air grill. FIG. 6 is a top view showing another example of the blowing direction of the intake air flow of the intake air grill. FIG. 7 is a side view simulating the temperature distribution and airflow in a conditioned room. FIG. 8 is a top view of the conditioned room in each of different relative positional relationships between the window and the air intake grille. FIG. 9 is a top view of the air-conditioned room in a symmetrical arrangement to FIG. FIG. 10 is a bottom perspective view of a main body portion and an top perspective view of a panel portion in the first modified example. FIG. 11 is a top view showing the blowing direction of the supply air flow of the air supply grill in the first modification. FIG. 12 is a bottom perspective view of a main body and an top perspective view of a panel in the second modification. FIG. 13 is a top view showing the blowing direction of the supply air flow of the air supply grill in the second modification. FIG. 14 is a perspective view and a central cross-sectional view of Patent Document 1.

The following describes an embodiment of the present invention with reference to the drawings. However, the embodiment described below is merely an example of an air intake grill structure to embody the technical concept of the present invention, and the present invention does not specify the air intake grill structure as described below. Furthermore, in the following description, the same names and symbols indicate the same or similar components, and detailed description will be omitted as appropriate. Also, the contents described in some of the examples and embodiments may be applicable to other examples, embodiments, etc.

(Embodiment)
First, the configuration of an air intake grille 1 according to an embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a bottom perspective view of the air intake grille 1 as seen from the indoor side, showing the state in which the air intake grille 1 is installed on a ceiling surface 5. Figure 2 is a cross-sectional perspective view of the air intake grille 1, showing the state in which the air intake grille 1 is connected to a heat-insulating duct 13. Here, a ceiling opening 8 that connects the ceiling space 11 to the indoor space is provided on the ceiling surface 5. Also, a heat-insulating duct 13 for transporting conditioned air 12 is extended near the ceiling opening 8 in the ceiling space 11.

The air intake grill 1 comprises a main body portion 2 and a panel portion 6.

The main body 2 is a member that holds the panel 6 while being fixed to the ceiling surface 5. The main body 2 includes a thin main body plate 3, a main body upper flange 9, and an exterior opening 10.

The thin body plate 3 is formed in a rectangular plate shape and is fixed to the ceiling surface 5 by a fixing jig or the like. In other words, the thin body plate 3 is fixed to the ceiling surface 5, and thus the main body part 2 is fixed to the ceiling surface 5. For aesthetic reasons, it is preferable that the thin body plate 3 be formed in a square shape, among rectangular shapes. The thin body plate 3 has a fixing surface 4.

The fixed surface 4 is the upper surface of the main body thin plate 3 and faces the ceiling surface 5. The fixed surface 4 abuts against the ceiling surface 5. Therefore, the ceiling surface 5 and the fixed surface 4 are in a substantially parallel relationship.

The main body upper flange 9 is formed in a generally cylindrical shape and protrudes vertically upward from the fixed surface 4. The main body upper flange 9 is inserted into the ceiling opening 8 when the fixed surface 4 is abutted against the ceiling surface 5. The main body upper flange 9 is fitted into the thermal insulation duct 13 with its outer periphery coinciding with the inner periphery of the thermal insulation duct 13.

The outdoor opening 10 is an opening provided at the protruding tip of the upper flange 9 of the main body. When the upper flange 9 of the main body is fitted into the insulated duct 13, the outdoor opening 10 ventilates the conditioned air 12 transported by the insulated duct 13 into the inside of the air supply grille 1.

The panel section 6 is a member that is attached vertically below the main body section 2. The panel section 6 rectifies the conditioned air 12 that is taken into the air supply grille 1 through the outdoor opening 10 in a direction approximately parallel to the fixed surface 4. The panel section 6 includes a thin panel plate 7.

The panel thin plate 7 is a part of the panel section 6 and is formed in a rectangular plate shape. The panel thin plate 7 is arranged facing the main body thin plate 3 with a certain gap between them. In other words, the panel thin plate 7 is approximately parallel to the main body thin plate 3 with a certain distance between them. For aesthetic reasons, the panel thin plate 7 is preferably formed in a square shape among rectangular shapes, and more preferably in a square shape that is the same size as the main body thin plate 3 or larger than the main body thin plate 3.

Next, the structure of the main body 2 will be described in more detail with reference to FIG. 3. FIG. 3 is a bottom perspective view of the main body 2. In the following description, the center defined on the main body 2 is referred to as the air intake grill center point 101a. Here, the air intake grill center point 101a is the intersection of the diagonals of the rectangular shape of the main body thin plate 3.

The main body 2 further includes a main body partition 14, an interior opening 15, a main body thin plate offset line 17, and a recess 18.

The main body partition wall 14 is a thin flange formed in an approximately cylindrical shape centered on the air intake grill center point 101a and protruding vertically downward from the main body thin plate 3. In this embodiment, the main body partition wall 14 is provided in an approximately 16-sided cylindrical shape with a hexagonal outer periphery and some faces removed. In other words, the main body partition wall 14 is formed by removing four consecutive adjacent sides of the approximately 16-sided cylindrical shape, and the part corresponding to the removed sides forms the indoor side opening 15 described below. As a result, the main body partition wall 14 is not strictly a 16-sided cylindrical shape because of the indoor side opening 15, but for the sake of understanding, the removed sides are expressed as being virtually present and are approximately 16-sided cylindrical. In addition, it is preferable that the main body partition wall 14 is provided so that one side of the approximately 16-sided cylindrical shape and one side of the rectangular shape of the main body thin plate 3 are parallel. The protruding tip of the main body partition wall 14 abuts against the panel thin plate 7 when the panel part 6 is attached to the main body part 2.

The indoor opening 15 is an opening for blowing out the conditioned air 12 supplied from the outdoor opening 10 in a direction substantially parallel to the fixed surface 4. The indoor opening 15 is provided by removing four consecutive adjacent side surfaces of the approximately 16-sided cylindrical body partition wall 14. The indoor opening 15 is composed of a first indoor opening 15a, a second indoor opening 15b, a third indoor opening 15c, and a fourth indoor opening 15d, which correspond to the four removed side surfaces, and four patterns of blowing directions can be realized. Note that since the indoor opening 15 is provided by removing four side surfaces, which are one-quarter of the total side surfaces of the approximately 16-sided cylindrical shape, the angle between the line connecting one end of the indoor opening 15 and the air intake grill center point 101a and the line connecting the other end of the indoor opening 15 and the air intake grill center point 101a is 90 degrees. Therefore, the indoor opening 15 can achieve four different air outlet directions within this 90-degree range by arranging the panel unit 6 in four different patterns, as will be described in detail later.

The main body thin plate offset line 17 is a virtual line that is provided in a rectangular shape on the outer periphery of the main body partition portion 14 on the main body thin plate 3, surrounding the main body partition portion 14. The main body thin plate offset line 17 is provided at a position that is a fixed distance 16 away from the outer periphery of the main body thin plate 3 toward the inner periphery.

The recess 18 is a recess for attaching the panel section 6 to the main body section 2. The recess 18 is formed as a circular recess of the same diameter, one at each of the four corner positions of the rectangular shape of the main body thin plate offset line 17. For convenience of the explanation described below, the recess 18 closest to the indoor opening 15 is referred to as the first recess 18a, and the recesses are referred to as the second recess 18b, the third recess 18c, and the fourth recess 18d in order clockwise along the main body thin plate offset line 17 when viewed from below. In addition, the corner of the main body thin plate 3 closest to the first recess 18a is referred to as the first main body corner 19a, the corner closest to the second recess 18b is referred to as the second main body corner 19b, the corner closest to the third recess 18c is referred to as the third main body corner 19c, and the corner closest to the fourth recess 18d is referred to as the fourth main body corner 19d.

Next, a more detailed structure of the panel section 6 will be described with reference to FIG. 4. FIG. 4 is an oblique view of the top of the panel section 6. In the following description, the center defined on the panel section 6 will be used as the air intake grill center point 101b. The air intake grill center point 101b is the intersection of diagonal lines on the panel thin plate 7. Note that the air intake grill center point 101b is located vertically below the air intake grill center point 101a when the panel section 6 is attached to the main body section 2.

The panel thin plate 7 has a panel partition portion 20, a panel partition opening 21, a panel thin plate offset line 22, and a protrusion 23.

The panel partition wall portion 20 is a thin flange formed in an approximately cylindrical shape centered on the air intake grill center point 101b and protruding vertically upward from the panel thin plate 7. In this embodiment, the panel partition wall portion 20 is formed in an approximately hexagonal cylindrical shape. The inner diameter of the panel partition wall portion 20 is formed to be slightly larger than the outer diameter of the main body partition wall portion 14. In other words, the inner circumference of the panel partition wall portion 20 abuts against the outer circumference of the main body partition wall portion 14 when the panel portion 6 is attached to the main body portion 2. Here, the panel partition wall portion 20 has a plurality of panel partition wall openings 21 by removing certain side surfaces from among the side surfaces of the approximately hexagonal cylindrical shape. In other words, the panel thin plate 7 is not strictly a hexagonal cylindrical shape because of the panel partition wall openings 21, but for the sake of understanding, the removed side surfaces are virtually present and are expressed as approximately hexagonal cylindrical shape. In addition, it is preferable that the panel partition wall portion 20 is formed so that one side surface of the approximately hexagonal cylindrical shape and one side of the rectangular panel thin plate 7 are parallel to each other. The protruding tip of the panel partition 20 abuts against the main body thin plate 3 when the panel section 6 is attached to the main body section 2. In this embodiment, the panel partition 20 and the main body partition 14 are the same height.

The panel partition opening 21 is an opening for limiting the blowing direction of the conditioned air 12 blown out from the indoor opening 15 to a specific direction. In other words, the panel partition opening 21 is an opening for selectively realizing one of the four possible blowing directions of the indoor opening 15 by the four patterns of arrangement of the panel section 6 to be described later. The panel partition opening 21 is provided by removing one or two side surfaces of each of four consecutive adjacent side surfaces of the approximately hexagonal cylindrical panel partition section 20. In other words, the panel partition openings 21 are provided in a plurality of positions in the circumferential direction centered on the air supply grill center point 101b, with the ends of the panel partition openings and the ends of other panel partition openings being equally spaced apart. In this embodiment, the plurality of panel partition openings 21 include one wide panel partition opening 21a provided by removing two side surfaces and two narrow panel partition openings 21b provided by removing one side surface.

The panel thin plate offset line 22 is a virtual line that is provided in a rectangular shape on the outer periphery of the panel partition section 20 on the panel thin plate 7, surrounding the panel partition section 20. The panel thin plate offset line 22 is provided at a position that is a fixed distance 16 away from the outer periphery of the panel thin plate 7 toward the inner periphery.

The convex portion 23 is a protrusion for mounting the panel portion 6 to the main body portion 2. The convex portion 23 is formed as a cylinder of the same diameter at each of the four corner positions of the rectangular shape of the panel thin plate offset line 22. The convex portion 23 has an outer diameter that matches the inner diameter of the recess 18 provided in the main body portion 2, and is provided to protrude vertically upward from the panel partition wall portion 20. For convenience of the description described later, the convex portion 23 closest to the wide panel partition wall opening 21a in FIG. 4 is referred to as the first convex portion 23a, and the convex portions 23b, 23c, and 23d are respectively referred to counterclockwise along the panel thin plate offset line 22 in the top view. In addition, the corner of the panel thin plate 7 closest to the first convex portion 23a is referred to as the first panel corner 25a, the corner closest to the second convex portion 23b is referred to as the second panel corner 25b, the corner closest to the third convex portion 23c is referred to as the third panel corner 25c, and the corner closest to the fourth convex portion 23d is referred to as the fourth panel corner 25d. All of the protrusions 23 are configured to fit into any of the recesses 18, and the panel 6 can be rotated 90 degrees at a time to attach it to the main body 2 in four different configurations.

The panel section 6 can be attached to the main body section 2 by fitting the protrusions 23 into the recesses 18, so the protrusions 23 and the recesses 18 can be called a pair of attachment parts. In this embodiment, the recesses 18 are provided on the main body section 2 side and the protrusions 23 are provided on the panel section 6, but the arrangement may be reversed, with the protrusions 23 provided on the main body section 2 side and the recesses 18 provided on the panel section 6. The important point is that the panel section 6 can be attached in four different arrangements at 90 degree intervals around the circumference of the main body section 2.

The above is the configuration of the air intake grill 1.

Next, we will explain the installation procedure for installing the air intake grill 1 configured as above on the ceiling surface 5.

The first step is to install an insulated duct 13 in the attic 11, which is connected to the air conditioner and the air conditioning room.

In the second step, a ceiling opening 8 is provided in the area on the ceiling surface 5 where the air intake grill 1 will be installed.

The third step is to pull the insulated duct 13 down through the ceiling opening 8 and pull it out into the room.

In the fourth step, the insulated duct 13 is fitted into the outdoor opening 10 of the main body 2 and connected and fixed.

In the fifth step, the upper flange 9 of the main body is inserted together with the heat-insulating duct 13 through the ceiling opening 8 into the ceiling space 11, and the fixing surface 4 is fixed to the ceiling surface 5. At this time, although not shown in the present embodiment, the main body 2 and the ceiling surface 5 are fixed together with screws, for example.

In the sixth step, the panel section 6 is pushed up from below onto the main body section 2 so that each protrusion 23 fits into one of the recesses 18. At this time, the panel partition section 20 covers the outer periphery of the main body partition section 14.

This completes the installation of the air intake grille 1. In the sixth step, all of the protrusions 23 are configured to be able to fit into any of the recesses 18, so the panel section 6 can be rotated 90 degrees at a time to be attached to the main body section 2 in four different arrangements. In addition, the indoor opening 15 can be selectively set to one of four directions for the blowing of the conditioned air 12, depending on the arrangement of the panel section 6.

This structure will be explained by dividing the sixth step into each pattern with reference to Figures 5 and 6. Figure 5 is a top view showing the blowing direction of the intake air flow from the intake grill in one of the combinations of the recessed portion 18 and the protruding portion 23 to be fitted, and Figure 6 is a top view showing the blowing direction of the intake air flow from the intake grill in a combination other than that shown in Figure 5, among the combinations of the recessed portion 18 and the protruding portion 23 to be fitted. In the following explanation, the direction of the intake grill center reference line 103 that passes through the midpoint of the side connecting the intake grill center point 101a to the first main body corner 19a and the fourth main body corner 19d is defined as the 0 degree direction.

Figure 5 illustrates the sixth step in which the first convex portion 23a is fitted into the fourth recess 18d, the second convex portion 23b into the first recess 18a, the third convex portion 23c into the second recess 18b, and the fourth convex portion 23d into the third recess 18c.

In this case, all of the indoor openings 15 except the first indoor opening 15a are blocked by the panel partition wall portion 20. Here, as shown in the enlarged view in the upper right of FIG. 5, the fourth indoor opening 15d on the inner periphery side is blocked by the panel partition wall portion 20 on the outer periphery side. The second indoor opening 15b and the third indoor opening 15c are also blocked on the outer periphery side by the panel partition wall portion 20. Therefore, only the first indoor opening 15a is opened by the large panel partition wall opening 21a. As a result, the conditioned air 12 conveyed from the air conditioner flows into the air supply grille 1 via the thermal insulation duct 13 and the outdoor opening 10, and is then blown out into the room as the supply air flow 28 from the first indoor opening 15a. Here, the blowing direction of the supply air flow 28 blown out from the first indoor opening 15a is the direction of the open indoor reference line 102a, which is the perpendicular bisector of the first indoor opening 15a when viewed from above, and the angle (first reference angle 104) with the reference air supply grill center reference line 103 is 0 degrees. In addition, in order to improve visibility, the open indoor reference line 102a and the air supply grill center reference line 103 are shown shifted in position in FIG. 5. Therefore, when the first convex portion 23a is fitted into the fourth recess 18d, the second convex portion 23b is fitted into the first recess 18a, the third convex portion 23c is fitted into the second recess 18b, and the fourth convex portion 23d is fitted into the third recess 18c, only the first indoor opening 15a is opened, and the supply air flow 28 is blown out so that the angle with the reference air supply grill center reference line 103 is 0 degrees.

Similarly, as shown in FIG. 6(a), in the sixth step, the first convex portion 23a is fitted into the third recess 18c, the second convex portion 23b into the fourth recess 18d, the third convex portion 23c into the first recess 18a, and the fourth convex portion 23d into the second recess 18b are fitted.

In this case, all of the indoor openings 15 except the second indoor opening 15b are blocked by the panel partition section 20. In other words, only the second indoor opening 15b is opened by the narrow panel partition opening 21b. Here, the blowing direction of the supply air flow 28 blown out from the second indoor opening 15b is the direction of the open indoor reference line 102b, which is the perpendicular bisector of the second indoor opening 15b, when viewed from above, as shown in Figure 6 (a), and the angle (first reference angle 104) with the reference air supply grill center reference line 103 is 22.5 degrees. Therefore, when the first convex portion 23a is fitted into the third recess 18c, the second convex portion 23b into the fourth recess 18d, the third convex portion 23c into the first recess 18a, and the fourth convex portion 23d into the second recess 18b, only the second indoor opening 15b opens, and the intake air flow 28 is blown out at an angle of 22.5 degrees with the reference intake air grill center reference line 103.

Similarly, as shown in FIG. 6(b), in the sixth step, the first convex portion 23a is fitted into the second recess 18b, the second convex portion 23b into the third recess 18c, the third convex portion 23c into the fourth recess 18d, and the fourth convex portion 23d into the first recess 18a will be described.

In this case, all of the indoor openings 15 except the third indoor opening 15c are blocked by the panel partition section 20. In other words, only the third indoor opening 15c is opened by the narrow panel partition opening 21b. Here, the blowing direction of the supply air flow 28 blown out from the third indoor opening 15c is the direction of the open indoor reference line 102c, which is the perpendicular bisector of the third indoor opening 15c, when viewed from above, as shown in Figure 6 (b), and the angle it makes with the reference air supply grill center reference line 103 is 45 degrees. Therefore, when the first convex portion 23a is fitted into the second recess 18b, the second convex portion 23b is fitted into the third recess 18c, the third convex portion 23c is fitted into the fourth recess 18d, and the fourth convex portion 23d is fitted into the first recess 18a, only the third indoor opening 15c opens, and the intake air flow 28 is blown out so that the angle it makes with the reference intake grill center reference line 103 (first reference angle 104) is 45 degrees.

Similarly, as shown in FIG. 6(c), in the sixth step, the first convex portion 23a is fitted into the first recess 18a, the second convex portion 23b into the second recess 18b, the third convex portion 23c into the third recess 18c, and the fourth convex portion 23d into the fourth recess 18d are described.

In this case, all of the indoor openings 15 except the fourth indoor opening 15d are blocked by the panel partition section 20. In other words, only the fourth indoor opening 15d is opened by the large panel partition opening 21a. Here, the blowing direction of the supply air flow 28 blown out from the fourth indoor opening 15d is the direction of the open indoor reference line 102d, which is the perpendicular bisector of the fourth indoor opening 15d, when viewed from above, as shown in Figure 6 (c), and the angle it makes with the reference air supply grill center reference line 103 is 67.5 degrees. Therefore, when the first convex portion 23a is fitted into the first recess 18a, the second convex portion 23b into the second recess 18b, the third convex portion 23c into the third recess 18c, and the fourth convex portion 23d into the fourth recess 18d, only the fourth indoor opening 15d opens, and the intake air flow 28 is blown out so that the angle it makes with the reference intake grill center reference line 103 (first reference angle 104) is 67.5 degrees.

As described above, by rotating the panel portion 6 in 90 degree increments to change the combination of the recessed portion 18 and the protruding portion 23 that are fitted together, it is possible to set the blowing direction of the intake air flow 28 (the angle with the intake air grill center reference line 103) from the four patterns shown in Figures 5 and 6.

It is desirable to determine which of the four directions the air outlet should be set to, based on the positional relationship between the position of the air intake grille 1 and the area with low insulation. The reason for this will be explained with reference to FIG. 7. In the following explanation, a window 29 is set as an example of an area with low insulation. FIG. 7(a) is a side view simulating the temperature distribution and airflow of the conditioned room 30 in which the air intake flow 28 of the conditioned air is not directed toward the area around the window 29, and FIG. 7(b) is a side view simulating the temperature distribution and airflow of the conditioned room 30 in which the air intake flow 28 of the conditioned air is directed toward the area around the window 29.

First, generally, when there is a temperature difference between the inside and outside of the room due to air conditioning or the like, a temperature area close to the temperature of the outside of the room is formed around the window 29 in the air-conditioned room 30, which has a large heat balance between the inside and outside of the room due to its low insulation. That is, in winter, as shown in FIG. 7(a), a high temperature area 31 that is suitable for the occupants is formed overall in the air-conditioned room 30, but a main low temperature area 32 is formed around the window 29. It is also known that the density of air is correlated with temperature, and the lower the temperature, the higher the density. In other words, the low temperature air 33 in the main low temperature area 32 flows downward from the window 29 periphery toward the floor 34 due to its high density. After that, the low temperature air 33 flows toward the center of the air-conditioned room 30 and the wall surface 35 facing the window 29, crawling along the floor 34, and a sub-low temperature area 36 is formed on the floor 34. As a result, the temperature above the floor 34 of the air-conditioned room 30 drops, creating a large temperature difference between the top and bottom of the air-conditioned room 30, resulting in a problem of reduced comfort for the occupants.

As a means of solving these problems, a method can be considered in which conditioned high-temperature air 37 is sent to the main low-temperature area 32 formed around the window 29 to suppress the formation of the main low-temperature area 32, as shown in Figure 7(b). This suppresses the amount of low-temperature air 33 flowing downward from the area around the window 29 toward the floor 34, and mitigates the formation of the sub-low-temperature area 36 above the floor 34 due to the density difference as described above. As a result, the temperature above the floor 34 of the air-conditioned room 30 is suppressed from decreasing, and the temperature difference between the top and bottom of the air-conditioned room 30 is also reduced, improving the comfort of the occupants.

However, the location of the intake grille 1, which is the source of this hot air 37, varies depending on the environment inside the building. This is because the insulated duct 13 connected to the intake grille 1 has a certain outer diameter and is difficult to bend due to the need to reduce noise and power consumption and to be equipped with insulating material to provide the insulating properties of the insulated duct 13. Therefore, if there are obstacles such as building equipment or pillars other than the insulated duct 13 under the floor, in the attic 11, behind the wall, etc. where the insulated duct 13 is to be installed, it is necessary to install the insulated duct 13 while avoiding these. For this reason, the intake grille 1 will be installed in various locations depending on the environment inside the building. Furthermore, the windows 29 will also be installed in various locations depending on the layout of the room.

In other words, to improve the comfort of the occupants, it is necessary to blow the hot air 37 from the air intake grille 1 toward the window 29. However, the optimal air outlet direction varies depending on the construction environment, such as the internal building environment and the placement of the windows 29, and there was an issue that conventional air intake grilles could not accommodate this.

One specific means for solving this problem is the present embodiment. In this embodiment, even if the relative positions of the window 29 and the air intake grille 1 change, it is possible to set the appropriate airflow direction by rotating the panel portion 6 in 90 degree increments to change the combination of the recessed portion 18 and the protruding portion 23 that fit together.

This structure will be explained using Figure 8. Figure 8(a) is a top view of the conditioned room 30 in which the window 29 is located to the right of the air intake grill 1 when viewed from above. Figure 8(b) is a top view of the conditioned room 30 in which the window 29 is located to the right of the air intake grill 1 and slightly higher than in Figure 8(a) when viewed from above. Figure 8(c) is a top view of the conditioned room 30 in which the window 29 is located to the right of the air intake grill 1 and even higher than in Figure 8(b) when viewed from above. Figure 8(d) is a top view of the conditioned room 30 in which the window 29 is located above the air intake grill 1 when viewed from above.

First, as shown in FIG. 8(a), when the window 29 is located to the right of the air intake grill 1 in top view, specifically, when the second reference angle 107 formed by the window reference line 106, which is a straight line passing through the window center point 105, which is the center of the window 29 in top view, and the air intake grill center point 101, and the air intake grill center reference line 103, is about 0 degrees. In this case, as shown in FIG. 5, in the sixth step, it is preferable to fit the first convex portion 23a into the fourth recess 18d, the second convex portion 23b into the first recess 18a, the third convex portion 23c into the second recess 18b, and the fourth convex portion 23d into the third recess 18c. As a result, the air intake flow 28 is blown out in a blowing direction in which the angle with respect to the air intake grill center reference line 103 is about 0 degrees, as shown in FIG. 8(a).

Next, as shown in FIG. 8(b), the case where the window 29 is located to the right of the air intake grill 1 and slightly higher than in FIG. 8(a) in top view will be described, specifically, the case where the second reference angle 107 is about 22.5 degrees. In this case, as shown in FIG. 6(a), in the sixth step, the first convex portion 23a is fitted into the third recess 18c, the second convex portion 23b into the fourth recess 18d, the third convex portion 23c into the first recess 18a, and the fourth convex portion 23d into the third recess 18c. As a result, the air intake flow 28 is blown out in a blowing direction that forms an angle of about 22.5 degrees with respect to the air intake grill center reference line 103, as shown in FIG. 8(b).

As shown in FIG. 8(c), when viewed from above, the window 29 is located to the right of the air intake grill 1 and further up than in FIG. 8(b), specifically, when the second reference angle 107 is about 45 degrees, will be described. In this case, as shown in FIG. 6(b), in the sixth step, the first convex portion 23a is fitted into the second recess 18b, the second convex portion 23b into the third recess 18c, the third convex portion 23c into the fourth recess 18d, and the fourth convex portion 23d into the first recess 18a. As a result, the air intake flow 28 is blown out in a blowing direction that is at an angle of about 45 degrees with respect to the air intake grill center reference line 103, as shown in FIG. 8(c).

As shown in FIG. 8(d), the case where the window 29 is located above the air intake grill 1 in top view, specifically, the case where the second reference angle 107 is approximately 67.5 degrees, will be described. In this case, as shown in FIG. 8(d), in the sixth step, the first convex portion 23a is fitted into the first recess 18a, the second convex portion 23b into the second recess 18b, the third convex portion 23c into the third recess 18c, and the fourth convex portion 23d into the fourth recess 18d. As a result, the air intake flow 28 is blown out in a blowing direction that forms an angle of approximately 67.5 degrees with respect to the air intake grill center reference line 103, as shown in FIG. 6(c).

As described above, in the sixth step, the blowing direction of the air intake grille 1 can be set toward the window 29 by the simple procedure of selecting a combination of the recessed portion 18 and the protruding portion 23 such that the angle with the reference air intake grille center reference line 103 is close to the second reference angle 107 in the construction environment. As a result, as shown in FIG. 7, the main low-temperature area 32 formed around the window 29 can be suppressed by sending the conditioned high-temperature air 37 along the ceiling surface 5 to the main low-temperature area 32 formed around the window 29. In addition, since the high-temperature air 37 is blown out along the ceiling surface 5 at this time, it is possible to prevent the occupants from being directly exposed to the high-temperature air 37, and to suppress the discomfort felt by the occupants.

Furthermore, in this embodiment, in any of the cases shown in Figures 8(a) to 8(d), the air intake grille 1 is attached to the ceiling surface 5 so that its outer periphery is parallel to the wall surface of the air-conditioned room 30. Therefore, it is possible to set the air intake flow 28 in the optimal blowing direction while maintaining the aesthetic appearance of the installation space.

As shown in Fig. 3, the indoor opening 15 provided in the main body 2 is provided by removing four sides, which are one-quarter of the total sides of the approximately hexagonal cylindrical shape, so that the angle between the line connecting one end of the indoor opening 15 and the air intake grill center point 101a and the line connecting the other end of the indoor opening 15 and the air intake grill center point 101a is 90 degrees. In addition, in the case of Fig. 5, the air intake grill 1 blows out the air intake flow 28 so that the angle with the reference air intake grill center reference line 103 is 0 degrees, and in the case of Fig. 6 (d), the air intake flow 28 blows out so that the angle with the reference air intake grill center reference line 103 is 67.5 degrees. In other words, in this embodiment, the angle between the blowing direction having the smallest angle and the blowing direction having the largest angle with respect to the air intake grill center reference line 103 is 67.5 degrees. Therefore, the angle between the blowing direction with the smallest angle and the blowing direction with the largest angle relative to the air intake grill center reference line 103 is set to be within a range of 90 degrees.

Next, using FIG. 9, we will explain a case where the positions of the window and the air intake grill are different from those in FIG. 8. FIG. 9 is a diagram assuming a construction environment that is bilaterally symmetrical to FIG. 8, with the opposing wall surface 35 in FIG. 8 as the symmetrical plane. In detail, FIG. 9(a) is a top view of the air-conditioned room 30 in which the window 29 is located to the left of the air intake grill 1 when viewed from above. FIG. 9(b) is a top view of the air-conditioned room 30 in which the window 29 is located to the left of the air intake grill 1 and slightly higher than in FIG. 9(a) when viewed from above. FIG. 9(c) is a top view of the air-conditioned room 30 in which the window 29 is located to the left of the air intake grill 1 and further higher than in FIG. 9(b) when viewed from above. FIG. 9(d) is a top view of the air-conditioned room 30 in which the window 29 is located above the air intake grill 1 when viewed from above.

In either case, the outer periphery of the thin body plate 3 connecting the first body corner 19a and the second body corner 19b is attached so that it faces the wall surface on which the window 29 is installed in the cases of Figures 8(a) to 8(c) when viewed from above. In other words, the main body 2 is attached in a state rotated 90 degrees counterclockwise around the air intake grill center point 101a from the mounting orientation in Figure 8. Therefore, the reference air intake grill center reference line 103 is also located at a position rotated 90 degrees counterclockwise around the air intake grill center point 101a.

9(a), when the window 29 is located to the left of the air intake grill 1 in top view, specifically, when the second reference angle 107 formed by the window reference line 106, which is a straight line passing through the window center point 105, which is the center of the window 29 in top view, and the air intake grill center point 101a, and the air intake grill center reference line 103, is approximately 67.5 degrees. In this case, as shown in FIG. 6(c), in the sixth step, the first convex portion 23a may be fitted into the first recess 18a, the second convex portion 23b into the second recess 18b, the third convex portion 23c into the third recess 18c, and the fourth convex portion 23d into the fourth recess 18d.

As shown in FIG. 9(b), when the window 29 is located to the left of the air intake grill 1 and slightly higher than in FIG. 9(a) in top view, specifically, when the second reference angle 107 formed by the window reference line 106, which is a straight line passing through the window center point 105, which is the center of the window 29 in top view, and the air intake grill center point 101, and the air intake grill center reference line 103, is about 45 degrees. In this case, as shown in FIG. 6(b), in the sixth step, it is preferable to fit the first convex portion 23a into the second recess 18b, the second convex portion 23b into the third recess 18c, the third convex portion 23c into the fourth recess 18d, and the fourth convex portion 23d into the first recess 18a.

As shown in FIG. 9(c), when the window 29 is located to the left of the air intake grill 1 and further up than in FIG. 9(b) in top view, specifically, when the second reference angle 107 formed by the window reference line 106, which is a straight line passing through the window center point 105, which is the center of the window 29 in top view, and the air intake grill center point 101, and the air intake grill center reference line 103, is about 22.5 degrees. In this case, as shown in FIG. 6(a), in the sixth step, it is preferable to fit the first convex portion 23a into the third recess 18c, the second convex portion 23b into the fourth recess 18d, the third convex portion 23c into the first recess 18a, and the fourth convex portion 23d into the third recess 18c.

9(d), a case will be described in which the window 29 is located above the air intake grill 1 in top view, specifically, a second reference angle 107 formed by a window reference line 106, which is a straight line passing through a window center point 105 that is the center of the window 29 in top view and the air intake grill center point 101, and the air intake grill center reference line 103, is approximately 0 degree. In this case, as shown in FIG. 5, in the sixth step, the first convex portion 23a may be fitted into the third recess 18c, the second convex portion 23b into the fourth recess 18d, the third convex portion 23c into the first recess 18a, and the fourth convex portion 23d into the third recess 18c.
As described above, by changing the direction of the indoor opening 15 while ensuring that the outer periphery of the main body 2 is parallel to the wall surface of the air-conditioned room 30, it is possible to accommodate any construction environment while maintaining the aesthetic appearance of the installation space.

In addition, in this embodiment, the main body partition 14 is formed integrally with the main body thin plate 3, and the panel partition 20 is formed integrally with the panel thin plate 7, but the main body partition 14 and the panel partition 20 may be separate members. However, by forming them integrally as in this embodiment, the blowing direction can be set with a simple structure and method, which simplifies construction and shortens construction time.

In general, the larger the area of the outlet from which the air is blown out, the lower the wind speed of the air being blown out. Therefore, as in this embodiment, by selecting and opening only the direction corresponding to the direction of the window 29 from the first indoor opening 15a, the second indoor opening 15b, the third indoor opening 15c, and the fourth indoor opening 15d, the area of the outlet becomes smaller, and air can be blown out at a sufficient wind speed.

In this embodiment, the main body partition section 14 and the panel partition section 20 are approximately hexagonal cylindrical, but there are no limitations on the shape of either, as long as four different air outlet directions can be achieved by attaching the panel sections in four patterns at 90 degree intervals around the circumference of the main body section 2. The following modified examples explain other shapes that the main body partition section 14 and the panel partition section 20 can take.

(Variation 1)
Using Figure 10, we will explain the case of the air supply grill 1 in which the main body partition 14 and the panel partition 20 have a shape other than a substantially hexagonal cylindrical shape. Figure 10(a) is a bottom perspective view of the main body 2 in the case of Modification 1, and Figure 10(b) is a bottom perspective view of the panel 6 in the case of Modification 1. Note that descriptions of parts having the same structure as in the embodiment will be omitted.

As shown in FIG. 10(a), the main body partition wall 14 is a thin flange formed in a substantially rectangular cylindrical shape and protruding vertically downward from the main body thin plate 3. The substantially rectangular cylindrical shape here refers to a shape that has a square periphery with four corners chamfered, centered on the air intake grill center point 101a of the main body thin plate 3, and that is parallel to the four sides of the main body thin plate 3. The main body partition wall 14 is provided with an indoor opening 15 by removing the side surface that exists between the line connecting the other midpoint of the rectangular adjacent two sides of the main body thin plate 3 and the air intake grill center point 101a, based on the line connecting the other midpoint of the other side and the air intake grill center point 101a. In other words, no flange is provided in a quarter of the area of all the side surfaces of the substantially rectangular cylindrical shape. In other words, the main body partition wall 14 is not strictly a rectangular cylindrical shape because of the indoor opening 15, but for the sake of understanding, the removed side surface is virtually present and is expressed as a substantially rectangular cylindrical shape.

10(b), the panel partition wall portion 20 is a thin flange formed in a substantially rectangular tubular shape protruding vertically upward from the panel thin plate 7. The substantially rectangular tubular shape here refers to a shape having a square outer periphery with four chamfered corners centered on the air intake grill center point 101b in the panel thin plate 7, and the outer periphery is parallel to the four sides of the panel thin plate 7. Here, the inner diameter of the panel partition wall portion 20 is formed to be slightly larger than the outer diameter of the main body partition wall portion 14. In other words, the inner periphery of the panel partition wall portion 20 abuts against the outer periphery of the main body partition wall portion 14 when the panel portion 6 is attached to the main body portion 2. The panel partition wall portion 20 is provided with one large panel partition wall opening 21a and two narrow panel partition wall openings 21b smaller than the large panel partition wall opening 21a. In other words, the panel thin plate 7 is not strictly a rectangular cylinder because of the panel partition opening 21, but for ease of understanding, it is expressed as having an approximately rectangular cylinder shape, assuming that the removed side surface exists virtually.

The blowing direction of the intake air flow 28 of the intake air grill 1 having the main body partition 14 and panel partition 20 as shown in FIG. 10 will be explained using FIG. 11. FIG. 11 is a top view showing the blowing direction of the intake air flow of the intake air grill 1 in the case of the first modified example.

Figure 11 (a) shows the first convex portion 23a fitted into the fourth recess 18d, the second convex portion 23b fitted into the first recess 18a, the third convex portion 23c fitted into the second recess 18b, and the fourth convex portion 23d fitted into the third recess 18c.

In this case, all of the indoor openings 15 except the first indoor opening 15a are blocked by the panel partition section 20. In other words, only the first indoor opening 15a is opened by the large panel partition opening 21a. Here, the blowing direction of the supply air flow 28 blown out from the first indoor opening 15a is the direction of the open indoor reference line 102a, which is the perpendicular bisector of the first indoor opening 15a, when viewed from above, as shown in FIG. 11(a). In the embodiment, the angle (first reference angle 104) with the reference air supply grill center reference line 103 was 0 degrees, but in the first modified example, the supply air flow 28 is blown out so that it is 11.25 degrees.

Figure 11 (b) shows the first convex portion 23a fitted into the third recess 18c, the second convex portion 23b fitted into the fourth recess 18d, the third convex portion 23c fitted into the first recess 18a, and the fourth convex portion 23d fitted into the second recess 18b.

In this case, the panel partition section 20 blocks all of the indoor openings 15 except the second indoor opening 15b. In other words, the narrow panel partition opening 21b opens only the second indoor opening 15b. Here, the blowing direction of the supply air flow 28 blown out from the second indoor opening 15b is the direction of the open indoor reference line 102b, which is the perpendicular bisector of the second indoor opening 15b, as shown in FIG. 11(b) when viewed from above. In the embodiment, the angle (first reference angle 104) with the reference air supply grill center reference line 103 was 22.5 degrees, but in the first modification, the supply air flow 28 is blown out so that it is 33.75 degrees.

Figure 11 (c) shows the first convex portion 23a fitted into the second recess 18b, the second convex portion 23b fitted into the third recess 18c, the third convex portion 23c fitted into the fourth recess 18d, and the fourth convex portion 23d fitted into the first recess 18a.

In this case, all of the indoor openings 15 except the third indoor opening 15c are blocked by the panel partition section 20. In other words, only the third indoor opening 15c is opened by the narrow panel partition opening 21b. Here, the blowing direction of the supply air flow 28 blown out from the third indoor opening 15c is the direction of the open indoor reference line 102c, which is the perpendicular bisector of the third indoor opening 15c, when viewed from above, as shown in FIG. 11(c). In the embodiment, the angle (first reference angle 104) with the reference air supply grill center reference line 103 was 45 degrees, but in the first modified example, the supply air flow 28 is blown out so that it is 56.25 degrees.

Figure 11 (d) shows the first convex portion 23a fitted into the first recess 18a, the second convex portion 23b fitted into the second recess 18b, the third convex portion 23c fitted into the third recess 18c, and the fourth convex portion 23d fitted into the fourth recess 18d.

In this case, all of the indoor openings 15 except the fourth indoor opening 15d are blocked by the panel partition section 20. In other words, only the fourth indoor opening 15d is opened by the large panel partition opening 21a. Here, the blowing direction of the supply air flow 28 blown out from the fourth indoor opening 15d is the direction of the open indoor reference line 102d, which is the perpendicular bisector of the fourth indoor opening 15d, as shown in FIG. 6(c) when viewed from above. In the embodiment, the angle (first reference angle 104) with the reference air supply grill center reference line 103 was 67.5 degrees, but in the first modified example, the supply air flow 28 is blown out so that it is 78.75 degrees.

As described above, in variant 1, by making the main body partition section 14 and the panel partition section 20 into an approximately rectangular cylindrical shape, the angle that the blowing direction of the intake air flow 28 makes with the intake air grill center reference line 103 can be set to four patterns: 11.25 degrees, 33.75 degrees, 56.25 degrees, and 78.75 degrees. In this way, the angle of the blowing direction can be set appropriately depending on the shape of the main body partition section 14 and the panel partition section 20.

(Variation 2)
A case where the number of panel partition openings 21 is changed will be described with reference to Fig. 12. Fig. 12(a) is a bottom perspective view of the main body in the case of Modification 2, and Fig. 12(b) is an top perspective view of the panel. Note that the main body 2 in Fig. 12(a) has the same shape as that in Fig. 10(a), and therefore the description thereof will be omitted.

As shown in FIG. 12(b), four panel partition wall openings 21 are provided in the panel partition wall 20. Specifically, in this embodiment and variant 1, one large panel partition wall opening 21a and two narrow panel partition wall openings 21b that are smaller than the large panel partition wall opening 21a are provided, but in variant 2, only four narrow panel partition wall openings 21b are provided.

As shown in FIG. 13, these four narrow panel partition openings 21b can selectively open one of the indoor side openings 15a, 15b, 15c, and 15d by rotating the panel portion 6 by 90 degrees. As described above, even if four panel partition openings 21 are provided in the panel partition 20, the blowing direction of the intake air flow 28 can be set to four patterns, such as angles of 11.25 degrees, 33.75 degrees, 56.25 degrees, and 78.75 degrees with respect to the intake grill center reference line 103, as in variant example 2. In this way, if four different blowing directions can be realized by rotating the panel portion 6 by 90 degrees, the arrangement and number of the panel partition openings 21 can be freely set.

In addition, in this embodiment and in the two examples in which the shapes of the main body partition section 14 and the panel partition section 20 are different, the recessed section 18 and the protruding section 23 are formed on the outer periphery of the main body partition section 14 and the panel partition section 20, but they may be formed on the inner periphery. However, in either case, attention must be paid to the structure, size, and position to prevent an increase in pressure loss in the air intake grille 1 and a negative impact on the stability of the blowing direction.

In addition, in this embodiment, a fitting structure of the recess 18 and the protrusion 23 is set as a pair of mounting parts, but there is no particular specification. However, it is preferable to set it to a structure that simplifies construction and shortens construction time.

In addition, although the purpose of this embodiment is to increase the comfort of occupants in the air-conditioned room 30 in which the air intake grille is installed, there is no particular purpose specified. This embodiment is characterized by the ability to appropriately set the air blowing direction with a simple structure and simple construction while maintaining the aesthetic appeal of the space in which the air intake grille 1 is installed, so it may be used, for example, as an air intake grille that sets the direction of clean air blowing that is optimal for the layout of each room so as to shorten the age of the air in the room.

The present invention has been described above based on the embodiments, but the present invention is in no way limited to the above embodiments, and it can be easily imagined that various improvements and modifications are possible within the scope of the invention without departing from its spirit.

(Summary of the Invention)
The air supply grille of the present invention comprises a main body having an outdoor opening for supplying air from the outside of the room and a fixing surface for fixing to a ceiling surface, an indoor opening for blowing out the air supplied from the outdoor opening approximately parallel to the fixing surface, a rectangular panel portion attached vertically below the main body portion, and a mounting portion capable of mounting the panel portion in four arrangement patterns at 90 degree increments around the periphery of the main body portion, and the indoor opening has a relationship in which, by mounting the main body portion and the panel portion via the mounting portion, there are four different blowing directions for each of the four arrangement patterns, and the four directions fall within a 90 degree range.

With this configuration, by adjusting the orientation of the panel section as needed and attaching it to the mounting section, it is possible to set the optimal supply air blowing direction for the installation environment while maintaining an aesthetic look. In other words, it is possible to increase the comfort of occupants by using a simple method to suppress the temperature difference between above and below the room, without forcing them to become cold or dry due to direct contact with the supply air flow.

In addition, in the air supply grille according to the present invention, the 90-degree range may be set based on the relationship between the center defined on the main body and the direction of one of the four patterns of indoor openings, and the angle with the other indoor opening that has the maximum angle with respect to the one indoor opening may be within 90 degrees.

In addition, in the air supply grille according to the present invention, the main body part may have a generally cylindrical main body partition part formed on the outer periphery of the outdoor opening, extending vertically downward from the fixed surface, and having an indoor opening, and the panel part may have a generally cylindrical panel partition part formed covering the main body partition part and the indoor opening, and extending vertically upward from the panel part, and the panel partition part may have a panel partition opening that selectively opens in one of four directions at the indoor opening for each of the four pattern arrangements.

This allows both the main body and panel sections to be manufactured as a single unit with simple structures, simplifying construction and shortening construction time.

In addition, in the air intake grill according to the present invention, the indoor opening may be configured such that the angle between the line connecting one end of the indoor opening and the center defined on the main body and the line connecting the other end of the indoor opening and the center is 90 degrees.

In addition, in the air supply grille according to the present invention, the indoor opening may be formed between a line connecting the midpoint of one of two adjacent rectangular sides of the panel section and the center defined on the main body section, and a line connecting the midpoint of the other of the two sides and the center.

In addition, the air supply grille according to the present invention may be configured so that multiple panel partition openings are provided at equal intervals in the circumferential direction of the generally cylindrical panel partition portion.

The air intake grille of the present invention can be used as an air intake grille that is connected to a duct that transports conditioned air.

REFERENCE SIGNS LIST 1 Air intake grille 2 Main body section 3 Main body thin plate 4 Fixing surface 5 Ceiling surface 6 Panel section 7 Panel thin plate 8 Ceiling opening 9 Main body upper flange 10 Outdoor opening 11 Ceiling space 12 Conditioned air 13 Insulated duct 14 Main body partition section 15 Indoor opening 15a First indoor opening 15b Second indoor opening 15c Third indoor opening 15d Fourth indoor opening 16 Fixed distance 17 Main body thin plate offset line 18 Recess 18a First recess 18b Second recess 18c Third recess 18d Fourth recess 19a First main body corner 19b Second main body corner 19c Third main body corner 19d Fourth main body corner 20 Panel partition section 21 Panel partition opening 22 Panel thin plate offset line 23 Convex portion 23a First convex portion 23b Second convex portion 23c Third convex portion 23d Fourth convex portion 25a First panel corner 25b Second panel corner 25c Third panel corner 25d Fourth panel corner 28 Intake air flow 29 Window 30 Conditioned room 31 High temperature area 32 Main low temperature area 33 Low temperature air 34 Above floor 35 Opposing wall surface 36 Second low temperature area 37 High temperature air 101 Intake air grill center point 102 Open room inside reference line 103 Intake air grill center reference line 104 First reference angle 105 Window center point 106 Window reference line 107 Second reference angle 201 Conditioned air 202 Duct connection port 203 Air outlet 204 Ceiling surface 205 Intake air flow 206 Intake air grill

Claims (6)

a main body having an outdoor opening for supplying air from the outdoor side and a fixing surface for fixing to a ceiling surface;
an indoor opening for blowing out the air supplied from the outdoor opening in a direction substantially parallel to the fixed surface;
A rectangular panel portion attached vertically below the main body portion;
a mounting portion capable of mounting the panel portion in four patterns arranged at 90 degree intervals in the circumferential direction of the main body portion,
The indoor opening is
An air supply grille in which, by attaching the main body portion and the panel portion via the attachment portion, four different blowing directions are achieved for each of the four arrangement patterns, and the four directions fall within a range of 90 degrees. The 90 degree range is:
An air intake grill as described in claim 1, wherein the angle between the one indoor side opening and the other indoor side opening having the maximum angle with respect to the one indoor side opening is within 90 degrees, based on the relationship between the center defined on the main body and the direction of the one indoor side opening among the four patterns. The main body portion is
a substantially cylindrical main body partition wall portion extending vertically downward from the main body portion on the outer circumferential side of the outdoor side opening and having the outdoor side opening;
The panel portion includes:
A substantially cylindrical panel partition wall portion is provided to cover the main body partition wall portion and the indoor side opening and extend vertically upward from the panel portion,
The panel partition portion is
2. The air supply grille according to claim 1, further comprising a panel partition opening that selectively opens in one of the four directions at the indoor side opening for each of the four arrangement patterns. The indoor opening is
The air supply grille of claim 3, wherein the angle between a line connecting one end of the indoor side opening and the center defined on the main body and a line connecting the other end of the indoor side opening and the center is 90 degrees. The indoor opening is
The air intake grille of claim 3, wherein the air intake grille is formed between a line connecting the midpoint of one of the two adjacent rectangular sides of the main body and a center defined on the main body, and a line connecting the midpoint of the other of the two sides and the center. The panel partition opening is
The air supply grille according to claim 3 , wherein a plurality of the air supply grilles are provided at equal intervals in a circumferential direction of the generally cylindrical panel partition portion.

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