JP7804282B2 - Air outlet components and air conditioning systems - Google Patents

Description

The present invention relates to an air outlet member and an air conditioning system.

One known air conditioning system for an indoor facility with multiple seats arranged on a stepped floor is one that provides air outlets at the stepped portions of the floor surface and causes air blown out from the outlets to rise along the backs of the seats, generating an upward airflow (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 7-247709

In recent years, there have been outbreaks of infectious diseases caused by the novel coronavirus, raising concerns about the spread of infection through droplets and airborne transmission in facilities where large numbers of people gather. Therefore, in order to prevent the spread of infectious diseases through droplets and airborne transmission in facilities where large numbers of people gather, it is necessary to build air conditioning systems that supply fresh air to users and prevent them from inhaling the exhaled air of other users.

The present invention therefore aims to provide an air outlet member and air conditioning system that can be used to create an air conditioning system that supplies fresh air to users and is less likely to inhale the exhaled air of other users.

In order to achieve the above object, the air outlet member of the present invention is attached to a supply port that supplies fresh air and is provided on a rising surface facing forward of a step in front of one of the seats in a facility where a plurality of seats are provided on a stepped floor that decreases in height from the rear to the front, and has: an intake port that takes in the fresh air; an outlet port that is provided above the intake port and blows the fresh air supplied to the intake port upward; a guide section that is provided above the outlet port and has a guide surface along which the fresh air blown out from the outlet port rises; and a diffusion section that has a diffusion surface that collides with the air that has been guided by the guide surface and rises and diffuses it horizontally, the guide surface being an arcuate surface that faces forward and has a vertical intermediate section that extends further forward than the upper and lower ends, the diffusion surface being a surface that is located in front of the guide surface and at the same height as the upper end of the guide surface and intersects with the guide surface, and the guide section is switchable between a first position in which the guide surface is located rearward and away from the diffusion surface, and a second position in which the guide surface is located forward and has its upper end continuous with the diffusion surface.

In order to achieve the above-mentioned objectives, the air conditioning system of the present invention has an air outlet member attached to a supply port that supplies fresh air and is provided on a rising surface facing forward of a step in front of one of the seats in a facility where multiple seats are provided on a stepped floor that becomes lower from the rear to the front, and the air outlet member has an intake port that takes in the fresh air, an outlet port that is provided above the intake port and blows the fresh air supplied to the intake port upward, and a guide member that is provided above the outlet port and has a guide surface along which the fresh air blown out from the outlet port rises. and a diffusion section equipped with a diffusion surface that collides with air that has been guided by the guide surface and rises, diffusing it horizontally. The guide surface is an arcuate surface that faces forward and whose vertical middle section extends further forward than the upper and lower ends. The diffusion surface is located in front of the guide surface and at the same height as the upper end of the guide surface, and is a surface that intersects with the guide surface. The guide section is switchable between a first position in which the guide surface is located rearward and away from the diffusion surface, and a second position in which the guide surface is located forward and its upper end is continuous with the diffusion surface.

In this invention, fresh air supplied from the supply port and drawn into the air outlet member through the intake port rises along the guide surface, which is a forward-projecting, i.e., forward-convex, arc-shaped surface. As the fresh air rises along the guide surface, it entrains air in front of the guide surface, increasing the airflow. This allows a large amount of fresh air to reach seated facility users, creating an air conditioning system that is less likely to inhale the exhaled air of other users. As a result, the ventilation efficiency of seated areas such as spectator areas is improved, preventing the spread of microdroplet and airborne infections in the facility.
When the guide unit is in the first position, the fresh air rising along the guide surface does not collide with the diffusion surface and diffuse, allowing the user seated in the seat to experience a sense of airflow from the jet of rising fresh air. When the guide unit is in the second position, the fresh air rising along the guide surface collide with the diffusion surface and diffuses, allowing the fresh air to be distributed over a wide area. When the guide unit is in the second position, the force of the fresh air reaching the user is weaker than when the guide unit is in the first position. Therefore, when the user wants to experience a sense of airflow from the jet of fresh air, it is preferable to set the guide surface to the first position, and when the user does not require a jet of fresh air, it is preferable to set the guide unit to the second position. The guide unit is switchable between the first position and the second position, allowing an airflow environment to be created that suits the user's preferences.

In addition, in the air outlet member according to the present invention, the front edge of the diffusion surface may be arc-shaped, with the middle portion projecting further forward than the side ends when viewed from the top-bottom direction.

This configuration allows the air that rises and hits the diffuser plate to travel in a wider direction, resulting in better diffusion.

Furthermore, in the air outlet member according to the present invention, a pair of side plate portions may be provided on both sides of the guide surface, and the guide surface may be disposed between the rear sides of the pair of side plate portions when in the first position, and between the front edges of the pair of side plate portions when in the second position.

With this configuration, when the guide portion is in the first position, the pair of side plates prevent the air rising along the guide surface from spreading out to the sides, allowing fresh air to reach the occupant seated in the seat.

In addition, in the air outlet member according to the present invention, the guide portion may be provided at the lower portion and configured to rotate about a rotation axis extending horizontally along the standing surface to switch between the first position and the second position.

This configuration allows the guide section to be easily switched between the first and second positions. The mechanism for switching the guide section between the first and second positions can be made simple in structure, making it easy to manufacture and maintain.

Furthermore, in the air outlet member according to the present invention, the guide portion may be switchable between the first position and the second position from above.

This configuration allows a seated user to easily switch the guide portion between the first and second positions from above the air outlet member.

Furthermore, the air outlet member according to the present invention may have a protruding plate located above the intake port and protruding forward beyond the intake port.

With this configuration, if dust or liquid gets inside the air outlet member, the dust or liquid will hit the protruding plate, preventing it from entering the supply port through the intake port.

Furthermore, the air outlet member according to the present invention may be provided at its lower end with a lower plate portion having a hole formed therethrough in the vertical direction.

With this configuration, if dust or liquid gets inside the air outlet member, the dust or liquid can be expelled from the hole to the outside of the air outlet member.

This invention makes it possible to create an air conditioning system that supplies fresh air to users and is less likely to inhale the exhaled air of other users.

1 illustrates an air conditioning system according to an embodiment of the present invention. FIG. FIG. 2 is a front view of the air outlet member as seen from the front. 4 is a cross-sectional view taken along line AA in FIG. 3, showing the air outlet member in the first position. FIG. 4 is a rear view of the air outlet member as seen from the rear. FIG. FIG. 10 is a cross-sectional view of the air outlet member in a second position. FIG. 1 is a diagram showing an outline of an experiment for evaluating the F value. FIG. 10 is a diagram showing an outline of an experiment for evaluating the degree of contribution. 10 is a graph showing experimental results of F-values. 10 is a graph showing experimental results of contribution degree. 1 is a table showing wind speed and temperature measurements. This is a contour diagram of wind speed distribution.

Hereinafter, an air outlet member and an air conditioning system according to an embodiment of the present invention will be described with reference to FIGS.
As shown in Fig. 1 , an air outlet member 1 according to this embodiment is provided at a supply port 13 of an air conditioning system 12 in an indoor facility 11. The indoor facility 11 is, for example, a facility that accommodates spectators, such as an indoor stadium or arena. The indoor facility 11 may also be a movie theater, a theater, or the like. The supply port 13 blows fresh air into a space in the indoor facility 11 where spectators are accommodated.

The indoor facility 11 has a stepped floor 14 and numerous seats 15 arranged on the stepped floor 14. The seats 15 are shown in Figure 1. The direction in which the steps of the stepped floor 14 are connected is referred to as the front-to-rear direction. In the front-to-rear direction, the lower side of the stepped floor 14 is referred to as the front side, and the higher side of the stepped floor 14 is referred to as the rear side. The horizontal part of the stepped floor 14 is referred to as the horizontal section 141, and the part extending in the vertical direction is referred to as the standing section 142. The surface of the standing section 142 is referred to as the standing surface 143. The front of the standing surface 143 faces forward. The horizontal direction perpendicular to the front-to-rear direction is referred to as the width direction. In the drawings, the width direction is indicated by arrow X, the front-to-rear direction is indicated by arrow Y, and the vertical direction is indicated by arrow Z.

The supply port 13 is provided on the standing surface 143. Fresh air is blown forward from the supply port 13. The air outlet member 1 is attached to the standing surface 143 and connected to the supply port 13. A seat 15 is installed in front of the air outlet member 1. The air conditioning system 12 is configured so that the air blown out from the air outlet member 1 flows upward to reach a user seated in the seat 15 installed on a horizontal section 141 that is continuous with the rear side of the standing surface 143 on which the air outlet member 1 is installed.
One supply port 13 is provided on the upright surface 143 in front of each seat 15. One air outlet member 1 is provided in front of each seat 15.
In the following description of the air outlet member 1, it is assumed that the air outlet member 1 is attached to the rising surface 143 of the step floor 14.

As shown in Figures 2 to 4, the air outlet member 1 has a back plate portion 2, a pair of side plate portions 3, 3, a lower plate portion 4, a front plate portion 5, a guide portion 6, and a diffusion portion 7. The back plate portion 2 is arranged along the upright surface 143. The pair of side plate portions 3, 3 are provided on both sides of the back plate portion 2 in the width direction. The lower plate portion 4 is provided between the lower ends of the pair of side plate portions 3, 3. The front plate portion 5 is provided between the lower sides of the front edges of the pair of side plate portions 3, 3. The guide portion 6 is provided between the pair of side plate portions 3, 3 so as to be movable in the front-to-rear direction. The diffusion portion 7 is provided between the upper ends of the pair of side plate portions 3, 3. The front view shape of the air outlet member 1 when viewed from the front-to-rear direction is a rectangle extending in the vertical direction.

As shown in Figure 5, the back panel 2 is flat and has a rectangular panel surface. The back panel 2 is fixed along the upright surface 143 with its panel surface facing the front-to-rear direction and extending in the up-down direction. The lower side of the back panel 2 overlaps with the supply port 13. An intake port 21 is provided at a position on the back panel 2 that overlaps with the supply port 13. Fresh air supplied from the supply port 13 is taken into the air outlet member 1 through the intake port 21. In this embodiment, the supply port 13 and the intake port 21 are rectangular, but are not limited to a rectangular shape and may be circular.

As shown in Figure 4, the pair of side plates 3, 3 are each flat and are arranged to protrude forward from the back plate 2 with their plate surfaces facing the width direction. The pair of side plates 3, 3 have approximately the same vertical dimensions as the back plate 2. The pair of side plates 3, 3 are positioned at the same height as the back plate 2. In this embodiment, the pair of side plates 3, 3 are fixed to the step floor 14 by being fixed to the upright surface 143 with L-shaped metal fittings 9. The metal fittings 9 are shown in Figure 3.

A notch 37 that opens toward the rear side is formed in the vertical middle of the side plate 3. The notch 37 penetrates the plate surface of the side plate 3.
The upper and lower rear edges 31 of the side plate 3, excluding the vertical intermediate portion where the notch 37 is formed, extend linearly in the vertical direction and are connected to the side edges of the back plate 2. The upper edge 32 and lower edge 33 of the side plate 3 extend linearly in the front-to-rear direction. The upper edge 32 of the side plate 3 extends further forward than the lower edge 33.

The front edge 34 of the side plate 3 is shaped like two arcs connected vertically. The lower portion of the front edge 34 of the side plate 3 is referred to as the first curved edge 35, and the upper portion of the front edge 34 is referred to as the second curved edge 36. The arcs of the first curved edge 35 and the second curved edge 36 both extend forward. The first curved edge 35 gradually extends forward from the bottom to the top. The upper end 35b of the first curved edge 35 is positioned further forward than the lower end 35a. The lower end 36a of the second curved edge 36 is positioned vertically below the upper end 36b of the second curved edge 36. The lower end 36a of the second curved edge 36 is connected to the upper end 35b of the first curved edge 35. The upper end 36b of the second curved edge 36 is connected to the front end 32a of the upper edge 32 of the side plate 3.

The front edge 371 of the cutout 37 (the edge opposite the side facing the upright surface 143) is arc-shaped and protrudes forward when viewed in the width direction. As described above, the cutout 37 penetrates the side plate 3 in the width direction. Therefore, one side of the side plate 3 in the width direction and the other side are connected via the cutout 37.

The lower plate portion 4 is flat. The lower plate portion 4 is oriented so that its plate surface is horizontal. The edge on one widthwise side of the lower plate portion 4 is connected to the lower edge portion 33 of the side plate portion 3 arranged on one side in the widthwise direction. The edge on the other widthwise side of the lower plate portion 4 is connected to the lower edge portion 33 of the side plate portion 3 arranged on the other side in the widthwise direction. The rear edge portion of the lower plate portion 4 is connected to the lower edge portion of the back plate portion 2. The front edge portion of the lower plate portion 4 is connected to the lower edge portion of the front plate portion 5.

The front panel 5 is provided along and between the first curved edge 35, which is the lower side of the front edge 34 of each of the pair of side panel sections 3. The front panel 5 is an arc-shaped plate corresponding to the first curved edge 35. The front panel 5 is positioned in front of and spaced from the intake port 21 of the back panel section 2.

As shown in Figures 2 to 4 and 6, the diffusion section 7 has a fixed plate section 71 connected near the upper ends of the front edges 34 of the pair of side plate sections 3, i.e., near the upper ends of the second curved edges 36, and a protruding plate section 72 protruding forward from the upper edges of the fixed plate section 71. The fixed plate section 71 has a rectangular, flat plate-like surface. One widthwise edge of the fixed plate section 71 is connected to the second curved edges 36 of the side plate section 3 on one widthwise side. The other widthwise edge of the fixed plate section 71 is connected to the second curved edges 36 of the side plate section 3 on the other widthwise side. The upper end of the fixed plate section 71 is located slightly below the upper edges 32 of the side plate sections 3. The protruding plate section 72 extends obliquely from the upper end of the fixed plate section 71 toward the front, gradually moving upward. The downward-facing surface of the protruding plate section 72 is referred to as the diffusion surface 73.

The front plate 5 and the diffusion section 7 are spaced apart in the vertical direction. Therefore, an opening that opens in the front-to-rear direction is provided between the front plate 5 and the diffusion section 7 between the pair of side plate sections 3. The front edge 731 of the diffusion surface 73 is arc-shaped, with the center in the width direction projecting further forward than both sides in the width direction.

As shown in Figures 2 and 4, the guide portion 6 is formed in the shape of an arc plate. The guide portion 6 is arranged so that its plate surface faces forward and backward. When viewed in the width direction, the guide portion 6 is arranged in an arc shape that protrudes forward. The guide portion 6 is arranged so that the lower end of a shaft portion 61 provided at the lower portion can rotate around a rotation shaft 611 of the shaft portion 61 attached to the pair of side plates 3, 3. The rotation shaft 611 extends in the width direction. The shaft portion 61 is arranged slightly above the intake port 21 of the back plate portion 2. The lower end of the guide portion 6 is arranged slightly above the intake port 21 of the back plate portion 2, i.e., slightly above the supply port 13. The lower end 6b of the guide portion 6 is arranged between the back plate portion 2 and the front plate portion 5.
The upper end 6 b of the guide portion 6 is disposed at approximately the same height as the upper ends of the pair of side plate portions 3 , 3 .

The guide portion 6 can rotate around the rotation axis 611 between a first position shown in Figure 4 in which the upper end portion 6b contacts the upper end portion of the back plate portion 2, and a second position shown in Figure 7 in which the vicinity of the upper end portion 6b contacts the diffusion portion 7. The front surface of the guide portion 6 is referred to as the guide surface 62.

The guide unit 6 can be switched between the first and second positions by the manager or user of the indoor facility 11 grasping the upper end of the guide unit 6 from above the air outlet member 1 or by moving it back and forth with their feet.

The guide portion 6 is positioned so that its lower side overlaps the rear of the front plate portion 5. Whether the guide portion 6 is in the first or second position, the lower side of the guide portion 6 and the front plate portion 5 are separated from each other in the front-to-rear direction. Fresh air is supplied from the supply port 13 and taken into the air outlet member 1 through the intake port 21, and is blown upward from the gap between the lower side of the guide portion 6 and the front plate portion 5. The gap between the lower side of the guide portion 6 and the front plate portion 5 forms the air outlet 8 of the air outlet member 1. The air outlet 8 opens in the vertical direction and is sandwiched between a pair of side plates 3, 3 in the width direction.

When the guide portion 6 is in the first position, it is positioned rearward of the front edge portions 34 of the pair of side plates 3, 3. At this time, the pair of side plates 3, 3 protrude forward of the guide portion 6. When the guide portion 6 is in the second position, it is positioned between the front edge portions 34 of the pair of side plates 3, 3. The distance between the guide portion 6 and the front plate portion 5 in the first position is greater than the distance between the guide portion 6 and the front plate portion 5 in the second position. In other words, when the guide portion 6 is in the first position, the air outlet 8 has a larger opening area than the air outlet 8 when the guide portion 6 is in the second position.

As shown in Figure 4, fresh air A1 taken into the air outlet member 1 through the air inlet 21 collides with the rear surface of the front panel 5, travels upward, and is blown upward from the air outlet 8. Air A2 blown upward from the air outlet 8 rises along the guide surface 62 due to the Coanda effect. At this time, air A3 in front of it is entrained in air A2 rising along the guide surface 62, so the volume of air rising along the guide surface 62 is greater than the volume of air blown out from the air outlet 8.

When the guide portion 6 is in the first position, air A2 rising along the guide surface 62 is discharged obliquely upward and rearward from the upper end portion 6b of the guide portion 6. The air outlet member 1 of this embodiment is configured so that, when the guide portion 6 is in the first position and the volume and speed of fresh air supplied to the air outlet member 1 are at predetermined positions, the air discharged obliquely upward and rearward from the upper end portion 6b of the guide portion 6 reaches the height of the mouths of a seat 15 installed behind the air outlet member 1.

When the guide unit 6 is in the second position, air A2 rising along the guide surface 62 collides with the diffusion surface 73 of the diffusion unit 7. The fresh air that rises along the guide surface 62 and collides with the diffusion surface 73 is diffused diagonally upward. In this embodiment, the front edge 731 of the diffusion surface 73 is arc-shaped and protrudes forward, so that the air that collides with the diffusion surface 73 is diffused forward and to the side. When the guide unit 6 is in the second position, the air that rises along the guide surface 62 can be diffused in a substantially horizontal direction.

In this embodiment, one air outlet member 1 is provided in front of each of the many seats 15. Therefore, a user sitting in a seat 15 can adjust the speed of the air supplied to them by switching the guide portion 6 of the air outlet member 1 in front of them.

As shown in Figure 4, a protruding plate 22 is provided along the upper and side edges of the intake port 21 of the back plate 2 and protrudes forward from the back plate 2. The portion of the protruding plate 22 that is provided along the upper edge of the intake port 21 is gradually inclined upward from the rear side to the front side. A slit 41 is formed in the lower plate 4, extending in the width direction and penetrating in the vertical direction. The slit 41 corresponds to a hole in the present invention.
If dust or liquid gets inside the air outlet member 1, the dust or liquid hits the protruding plate 22, preventing it from entering the supply port 13 through the inlet 21. The protruding plate 22 is provided as a drain. If dust or liquid falls below the protruding plate 22, it is discharged downward through the slits 41 formed in the lower plate 4.

Next, the operation and effects of the air outlet member 1 and the air conditioning system 12 according to the present embodiment will be described.
In the air outlet member 1 and air conditioning system 12 according to the present embodiment, fresh air supplied from the supply port 13 and taken into the air outlet member 1 through the inlet port 21 rises along the guide surface 62, which is a forward-convex arcuate surface. As the fresh air rises along the guide surface 62, air in front of the guide surface 62 is drawn in, increasing the air volume. This allows more fresh air to reach the users of the indoor facility 11 seated in the seats 15, and creates an air conditioning system 12 that is less likely to inhale the exhaled air of other users. As a result, the ventilation efficiency of spectator seats and other areas where the seats 15 are located is improved, preventing the spread of microdroplet and airborne infections of infectious diseases in the indoor facility 11.

When the guide unit 6 is in the first position, the fresh air rising along the guide surface 62 does not collide with the diffusion surface 73 and diffuse, allowing the seated user to experience a sense of airflow from the rising jet of fresh air. When the guide unit 6 is in the second position, the fresh air rising along the guide surface 62 collides with the diffusion surface 73 and diffuses, allowing the fresh air to be distributed over a wide area. When the guide unit 6 is in the second position, the force of the fresh air reaching the user is weaker than when the guide unit 6 is in the first position. Therefore, if the user wants to experience a sense of airflow from the jet of fresh air, it is preferable to set the guide surface to the first position, and if the user does not require a jet of fresh air, it is preferable to set the guide unit 6 to the second position. A situation in which a jet of fresh air A1 is not required occurs when the user prefers a situation without wind, such as when the user feels cold when exposed to fresh air.
The guide portion 6 can be switched between the first position and the second position, so that an airflow environment can be created that suits the user's preference.

In addition, in the air outlet member 1 according to this embodiment, the front edge 731 of the diffusion surface 73 has an arc shape in which the middle part projects further forward than the side end parts when viewed from the top-bottom direction.
With this configuration, the air that rises and collides with the diffusion surface 73 moves in a wider direction, allowing for better diffusion.

In addition, in the air outlet member 1 according to this embodiment, a pair of side plate portions 3, 3 are provided on both sides of the guide surface 62, and when the guide surface 62 is in the first position, it is positioned between the rear sides of the pair of side plate portions 3, 3, and when it is in the second position, it is positioned between the front edge portions of the pair of side plate portions 3, 3.
With this configuration, when the guide portion 6 is in the first position, the pair of side plate portions 3, 3 can prevent the air rising along the guide surface 62 from spreading sideways, allowing fresh air to reach the user sitting in the seat.

In addition, in the air outlet member 1 according to this embodiment, the guide portion 6 is provided at the lower portion and is configured to rotate around a rotation axis 611 extending horizontally along the standing surface 143 to switch between the first position and the second position.
With this configuration, the guide portion 6 can be easily switched between the first position and the second position. The mechanism for switching the guide portion 6 between the first position and the second position can be made to have a simple structure, which makes it easy to manufacture and maintain.

Furthermore, in the air outlet member 1 according to this embodiment, the guide portion 6 can be switched between the first position and the second position from above the air outlet member 1 .
With this configuration, a user sitting on the seat 15 can easily switch the guide portion 6 between the first position and the second position from above the air outlet member 1.

Furthermore, the air outlet member 1 according to this embodiment is provided with a protruding plate 22 that is provided along the upper edge and side edge of the inlet 21 and protrudes forward from the back plate portion 2 .
With this configuration, if dust or the like gets inside the air outlet member 1, the dust or the like hits the protruding plate 22, so that the dust or the like can be prevented from entering the supply port 13 through the intake port 21.

In the air outlet member 1 according to this embodiment, the lower plate portion 4 is formed with a slit 41 penetrating in the up-down direction.
With this configuration, if dust or the like gets inside the air outlet member 1, the dust or the like can be discharged to the outside of the air outlet member 1 through the slits 41. The inside of the air outlet member 1 can be kept clean at all times.

An experiment was conducted to evaluate the ventilation performance of an air conditioning system provided with the air outlet member according to this embodiment.
In the experiment, _CO2 was used as the tracer gas. The following F values and contributions were evaluated:
F value: How much of someone else's breath you are inhaling.
Contribution: How much fresh air is being drawn in from the air outlet?

The F-value is expressed by the following formula (1). Figure 8 shows the experimental method for determining the F-value.

The contribution rate (ε) is expressed by the following equation (2). Figure 9 shows the experimental method for the F value.

The F-value was compared between an air conditioning system employing the air outlet member 1 of this embodiment and a jet system in which the guide portion 6 is in the first position, and a conventional system in which air is supplied from above the seat.
Regarding the degree of contribution, a comparison was made between an air conditioning system employing the air outlet member 1 of this embodiment, in which the guide portion 6 is in the first position, a diffusion system in which the guide portion 6 is in the second position, and a conventional system in which air is supplied from above the seat.

As shown in FIG. 10, by using the jet flow method, the F-number can be reduced by 25% to 40% compared to the conventional method, and it is clear that the exhaled air of other spectators is less likely to be inhaled.
As shown in FIG. 11, by using the jet flow method and the diffusion method, the contribution can be increased by 1.6 to 2 times compared to the conventional method, and it can be seen that fresh air can be supplied efficiently.

The environmental change performance was confirmed by measuring the airflow distribution.
Figure 12 shows the results of the wind speed distribution measurement and the temperature distribution measurement. Figure 13 shows a contour diagram of the wind speed distribution measurement. As shown in Figures 12 and 13, it can be seen that in the air conditioning systems employing the air outlet member 1 of this embodiment, both the jet system and the diffusion system can supply fresh air to the height of the user's mouth. In particular, it can be seen that the jet system can supply fresh air closer to the user's mouth than the diffusion system.

Although the embodiments of the air outlet member according to the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate within the scope of the invention.
For example, in the above embodiment, the front edge 731 of the diffusion surface 73 has an arc shape with the middle part projecting further forward than the side end parts when viewed from the top-bottom direction, but it may have a shape other than an arc shape, such as a linear shape extending in the width direction or a shape with multiple recesses or protrusions. The orientation and size of the diffusion surface 73 may be set as appropriate.

In the above embodiment, the guide surface 62 is positioned between the rear sides of the pair of side plate portions 3, 3 in the first position, and between the front edges of the pair of side plate portions 3, 3 in the second position, but it may also be positioned between the rear sides of the pair of side plate portions 3, 3 even in the second position. The pair of side plate portions 3, 3 may always protrude forward of the guide surface 62.

In the above embodiment, the guide unit 6 is configured to rotate about the rotation shaft 611 to switch between the first position and the second position, but the position at which the guide unit 6 switches between the first position and the second position may be other than the above. For example, the guide unit 6 may slide to switch between the first position and the second position.
The guide portion 6 may be configured to be able to switch between the first position and the second position from the side or below the air outlet member 1 instead of from above.

In the above embodiment, protruding plates 22 protruding forward from the back panel 2 are provided along the upper and side edges of the intake port 21 to prevent dust and other particles that have gotten inside the air outlet member 1 from entering the supply port 13. The mechanism for preventing dust and other particles that have gotten inside the air outlet member 1 from entering the supply port 13 may be other than the above, or may not be provided at all. The protruding plates 22 may be provided only along the upper edge of the intake port 21. The protruding plates 22 may also be provided above the upper edge of the intake port 21 and to the side of the side edge.

In the above embodiment, slits 41 are formed in the lower plate portion 4, and are configured so that dust and other particles that have entered the interior of the air outlet member 1 can be discharged through the slits 41. The mechanism for discharging dust and other particles that have entered the interior of the air outlet member 1 to the outside may be other than the above, or may not be provided at all. Instead of the slits 41 extending in the width direction, the lower plate portion 4 may be formed with round holes or the like for discharging dust and other particles to the outside.

In the above embodiment, the side plate portion 3 has a cutout portion 37 formed therein, but the side plate portion 3 does not necessarily have to have a cutout portion 37 formed therein.

1 Air outlet member 3 Side plate portion 4 Lower plate portion 6 Guide portion 7 Diffusion portion 8 Air outlet 11 Indoor facility 12 Air conditioning system 13 Supply port 14 Step floor 15 Seat 21 Intake port 22 Protruding plate 41 Slit (hole portion)
62 Guide surface 73 Diffusion surface 143 Standing surface 611 Rotation shaft 731 Front edge portion

Claims (8)

In a facility where a plurality of seats are provided on a stepped floor that becomes lower from the rear to the front, the supply port is attached to a supply port that supplies fresh air and is provided on a rising surface facing forward of the step in front of one of the seats,
an intake port for taking in the fresh air;
an air outlet provided above the intake port and blowing the fresh air supplied to the intake port upward;
a guide portion provided above the air outlet and including a guide surface along which the fresh air blown out from the air outlet rises;
a diffusion unit having a diffusion surface that collides with the air that has been guided by the guide surface and rises, and diffuses the air in a horizontal direction,
the guide surface is an arcuate surface facing forward, with a vertically intermediate portion thereof projecting further forward than an upper end portion and a lower end portion,
the diffusion surface is a surface located in front of the guide surface and at the same height as an upper end of the guide surface, and intersects with the guide surface,
The guide portion is an air outlet member that can be switched between a first position in which the guide surface is located rearward and away from the diffusion surface, and a second position in which the guide surface is located forward and its upper end is continuous with the diffusion surface. An air outlet member as described in claim 1, wherein the front edge of the diffusion surface has an arc shape with the middle portion extending further forward than the side ends when viewed from the top-bottom direction. A pair of side plates are provided on both sides of the guide surface,
The air outlet member according to claim 1 or 2, wherein the guide surface is positioned between the rear sides of the pair of side plate portions when in the first position, and between the front edge portions of the pair of side plate portions when in the second position. An air outlet member according to any one of claims 1 to 3, wherein the guide portion is provided at the lower portion and rotates around a rotation axis extending horizontally along the upright surface to switch between the first position and the second position. An air outlet member according to any one of claims 1 to 4, wherein the guide portion can be switched between the first position and the second position from above. An air outlet member according to any one of claims 1 to 5, which has a protruding plate located above the intake port and protruding forward of the intake port. An air outlet member according to any one of claims 1 to 6, wherein a lower plate portion having a hole extending vertically therethrough is provided at the lower end. The air outlet member is attached to a supply port that supplies fresh air and is provided on a rising surface facing forward of a step in front of one of the seats in a facility where a plurality of seats are provided on a stepped floor that becomes lower from the rear to the front,
The air outlet member is
an intake port for taking in the fresh air;
an air outlet provided above the intake port and blowing the fresh air supplied to the intake port upward;
a guide portion provided above the air outlet and including a guide surface along which the fresh air blown out from the air outlet rises;
a diffusion unit having a diffusion surface that collides with the air that has been guided by the guide surface and rises, and diffuses the air in a horizontal direction,
the guide surface is an arcuate surface facing forward, with a vertically intermediate portion thereof projecting further forward than an upper end portion and a lower end portion,
the diffusion surface is a surface located in front of the guide surface and at the same height as an upper end of the guide surface, and intersects with the guide surface,
An air conditioning system in which the guide portion is switchable between a first position in which the guide surface is located rearward and away from the diffusion surface, and a second position in which the guide surface is located forward and its upper end is continuous with the diffusion surface.